From: rich Date: Wed, 27 Sep 2006 14:44:08 +0000 (+0000) Subject: mmalloc from last version to be included in gdb. X-Git-Tag: 0.9.0~23 X-Git-Url: http://git.annexia.org/?a=commitdiff_plain;h=d70485fb7a2776fbfeccdabc568aa98ab3a80225;p=ocaml-ancient.git mmalloc from last version to be included in gdb. --- diff --git a/mmalloc/.cvsignore b/mmalloc/.cvsignore new file mode 100644 index 0000000..c166791 --- /dev/null +++ b/mmalloc/.cvsignore @@ -0,0 +1,5 @@ +Makefile +autom4te.cache +config.cache +config.log +config.status \ No newline at end of file diff --git a/mmalloc/COPYING.LIB b/mmalloc/COPYING.LIB new file mode 100644 index 0000000..eb685a5 --- /dev/null +++ b/mmalloc/COPYING.LIB @@ -0,0 +1,481 @@ + GNU LIBRARY GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1991 Free Software Foundation, Inc. + 675 Mass Ave, Cambridge, MA 02139, USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + +[This is the first released version of the library GPL. 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Support DESTDIR. + (install): Likewise. + +2002-11-28 Elena Zannoni + + * Makefile.in (install): Move install-info to here... + (all): ...from here. + +2002-11-26 Elena Zannoni + + * Makefile.in (INFO_DEPS): Define. + (all): Add install-info to the rule. + (info): Unse INFO_DEPS. + (install-info): Rewrite. + (uninstall-info): New. + (uninstall): New. + +2002-04-07 Andrew Cagney + + From 2002-03-05 Scott Pakin + * mmap-sup.c (MAP_PRIVATE_OR_SHARED): Define. + (__mmalloc_mmap_morecore): Use. + (__mmalloc_remap_core): Use. + +2000-05-17 Eli Zaretskii + + * Makefile.in (install-info): Make sure $(infodir) exists. Run + install-info program on the installed Info files. + +2000-03-20 Eli Zaretskii + + * Makefile.in (install): Append "n", not ".n" to libmmalloc.a, + since the latter loses on DOS 8+3 filesystems. + +Mon Feb 28 10:33:51 2000 Andrew Cagney + + * MAINTAINERS: New file. + +2000-02-18 Frank Ch. Eigler + + From Jason "crash" Molenda : + * configure.in: Check for getpagesize declaration. + * mvmalloc.c, mmap-sup.c: Conditionally declare getpagesize. + * configure: Regenerated. + +Fri Feb 18 11:42:21 2000 Andrew Cagney + + * configure.in: Check for . + * configure: Regenerate. + + From 2000-02-17 RodneyBrown@pmsc.com: + * mm.c, attach.c, mmap-sup.c, sbrk-sup.c: Include for + sbrk and lseek declarations. Update copyright. + +2000-02-04 Kevin Buettner (kevinb@cygnus.com) + + * acinclude.m4, aclocal.m4: New files. + * configure.in (sbrk): Use BFD_NEED_DECLARATION to test for + presence of a suitable declaration in the system headers. + * configure: Regenerated. + * sbrk-sup.c (sbrk): Ifdef'd with NEED_DECLARATION_SBRK. + +1999-01-04 Jason Molenda (jsm@bugshack.cygnus.com) + + * configure.in: Requires autoconf 2.12.1 or higher. + * configure: Regenerated. + +1998-07-24 Jim Blandy + + * mcalloc.c: #include before . HP/UX 11.0 + needs this. + +Thu Apr 23 12:19:22 1998 Philippe De Muyter + + * mmalloc.h: Include sys/types.h and stdio.h #ifndef HAVE_STDDEF_H. + * mmprivate.h: Do not handle HAVE_STDDEF_H here, since we include + mmalloc.h. + +Tue Mar 24 17:07:02 1998 Stu Grossman + + * Makefile.in: Get SHELL from configure. + * configure: Regenerate with autoconf 2.12.1 to fix shell issues for + NT native builds. + +Mon Feb 7 13:06:45 1997 Philippe De Muyter + + * mmalloc/detach.c: Do not include fcntl.h. + +Thu Aug 28 13:15:07 1997 Andrew Cagney + + * mrealloc.c (realloc): Store result in local variable before + returning it. Makes debugging much easier at negligible cost. + +Tue Feb 4 16:30:59 1997 Ian Lance Taylor + + * mvalloc.c (cache_pagesize): Rename from pagesize, so that if we + are building mm.o, it does not conflict with the variable of the + same name in mmap-sup.c. + +Sat Dec 28 12:48:32 1996 Fred Fish + + * Makefile.in (mm.o): New target that combines all the functions + into a single object module. This avoids client programs picking + up part of the allocation routines from mmalloc and part from libc, + which can lead to undefined behavior. + (CFILES): Add mm.c + (TARGETOBJS): Define to be either the individual objects or the + single combined object. + (TARGETLIB): Create the archive using TARGETOBJS. + * mm.c: New file that simply #includes the other source C files. + +Thu Oct 3 15:45:23 1996 Jason Molenda (crash@godzilla.cygnus.co.jp) + + * Makefile.in (maintainer-clean): Depend on distclean, remove + duplication. + +Tue Sep 10 17:52:06 1996 Fred Fish + + * mmcheck.c (checkhdr): Add prototype. + (mfree_check): Ditto. + (mmalloc_check): Ditto. + (mrealloc_check): Ditto. + * mmtrace.c (tr_break): Ditto. + (tr_freehook): Ditto. + (tr_mallochook): Ditto. + (tr_reallochook): Ditto. + * sbrk-sup.c (sbrk_morecore): Ditto. + +Wed Sep 4 18:02:45 1996 Stu Grossman (grossman@critters.cygnus.com) + + * configure configure.in: Don't default CC to cc. It causes problems + when starting a compile in the mmalloc directory. + +Wed Jul 24 00:53:34 1996 Fred Fish + + * mmalloc.h (mmalloc_findbase): Add prototype. + +Fri Jul 12 18:35:34 1996 Fred Fish + + * mmap-sup.c (mmalloc_findbase): Change to not require /dev/zero + if MMAP_ANONYMOUS is available. + +Wed Jul 10 23:53:42 1996 Fred Fish + + * detach.c (mmalloc_detach): Fix bug in computation of negative + brk value. + * mmcheck.c (mmcheckf): Renamed from mmcheck and new FORCE argument + added. Replaced hack that always allowed checking routines to be + installed and enforce restriction that they have to be installed + prior to allocating any memory on the used heap or the FORCE argument + has to be non-NULL. + (mmcheck): New function that calls mmcheckf with FORCE set to zero, + for backwards compatibility. + * mmalloc.c (malloc): Store result in local variable before + returning it. Makes debugging much easier at negligible cost. + * mmalloc.h (mmcheckf): Declare. + * attach.c (reuse): Call mmcheckf rather than mmcheck. + * mmap-sup.c (__mmalloc_mmap_morecore): Improve to allow mmap + to select a base mapping address if none is otherwise given. + (mmalloc_findbase): New function that user can call to find + an available mapping address of a given size. + +Tue Jun 25 22:54:06 1996 Jason Molenda (crash@godzilla.cygnus.co.jp) + + * Makefile.in (bindir, libdir, datadir, mandir, infodir, includedir): + Use autoconf-set values. + (docdir): Removed. + * configure.in (AC_PREREQ): autoconf 2.5 or higher. + * configure: Rebuilt. + +Tue May 28 13:51:22 1996 Fred Fish + + From: Thomas A Peterson + * Makefile.in (install-info): Apply patch to install + mmalloc.info from srcdir if not found in build dir. + +Sun Apr 7 20:55:30 1996 Fred Fish + + From: Miles Bader + * configure.in: Use AC_CHECK_TOOL to find AR & RANLIB. + * configure: Regenerate with autoconf. + * Makefile.in: Use AR set by configure substitution. + +Fri Mar 29 09:57:36 1996 Fred Fish + + * mmalloc.h (mmtrace): Add prototype. + +Sat Feb 3 12:41:00 1996 Fred Fish + + From H.J. Lu (hjl@gnu.ai.mit.edu): + * mvalloc.c (valloc): new. + * mmemalign.c: Allocate (SIZE + ALIGNMENT - 1) and then trim + if possible. + (memalign): don't put the node on the _aligned_blocks list more + than once. + +Mon Nov 20 12:04:32 1995 Fred Fish + + * Makefile.in (OFILES): Make objects depend upon Makefile, + since Makefile sets DEFS which can definitely affect how + objects are to be compiled. + +Mon Nov 6 14:12:13 1995 Jason Molenda (crash@phydeaux.cygnus.com) + + * configure.in (AC_CHECK_HEADERS): add limits.h. + (AC_HEADER_STDC): remove. + + * mmalloc.h: document necessity of defining size_t before + including mmalloc.h. + + * mmprivate.h: add check for limits.h, remove definition of + NULL and size_t. + +Sun Nov 5 00:27:36 1995 Jason Molenda (crash@phydeaux.cygnus.com) + + * configure.in: AC_CHECK_HEADERS, not AC_CHECK_HEADER. + +Sun Nov 5 00:14:13 1995 Jason Molenda (crash@phydeaux.cygnus.com) + + * configure.in: add check for stddef.h + * mmalloc.h: include stddef.h if HAVE_STDDEF_H is defined. + +Sat Nov 4 19:10:13 1995 Jason Molenda (crash@phydeaux.cygnus.com) + + * configure.in: add AC_HEADER_STDC check. + + * mmalloc.h: check if STDC_HEADERS instead of __STDC__. + + * mmprivate.h: check if STDC_HEADERS instead of __STDC__. + +Tue Oct 24 13:17:44 1995 Stan Shebs + + * mmprivate.h: Remove declarations (PTR, etc) that are already + provided by ansidecl.h, include mmalloc.h earlier in file. + +Tue Oct 10 11:04:47 1995 Fred Fish + + * Makefile.in (BISON): Remove macro. + +Wed Sep 20 12:51:13 1995 Ian Lance Taylor + + * Makefile.in (maintainer-clean): New target, synonym for + realclean. Add GNU standard maintainer-clean echos. + +Thu Aug 3 10:45:37 1995 Fred Fish + + * Update all FSF addresses except those in COPYING* files + and shar archive of original FSF files. + +Mon Jun 12 12:11:57 1995 J.T. Conklin + + * Makefile.in (distclean, realclean): Remove config.cache and + config.log. + +Wed May 17 17:47:44 1995 J.T. Conklin + + * Makefile.in (Makefile): Added config.status to dependency list. + (config.status): New target. + +Fri May 5 15:17:53 1995 J.T. Conklin + + * mmap-sup.c: Removed munmap prototype. Some systems have a + slightly different prototype. + +Wed May 3 17:18:13 1995 J.T. Conklin + + * Makefile.in, configure.in: Converted to use autoconf. + * configure: New file, generated with autoconf 2.3. + * config/{mh-go32, mh-irix, mh-ncr3000, mh-sunos4, + mh-sysv4}: Removed. + +Thu Nov 3 23:55:21 1994 Ian Lance Taylor (ian@tweedledumb.cygnus.com) + + * Makefile.in (install-info): Name destination file correctly, + rather than using undefined shell variable. + +Fri Oct 28 16:46:58 1994 Stan Shebs (shebs@andros.cygnus.com) + + * mmprivate.h: New file, was mmalloc.h. + (mmalloc.h): Include. + * mmalloc.h: Remove all but declarations of mmalloc functions. + (ansidecl.h): Include. + * attach.c, et al: Include mmprivate.h instead of mmalloc.h. + +Wed Aug 24 12:55:33 1994 Ian Lance Taylor (ian@sanguine.cygnus.com) + + * configure.in: Change i[34]86 to i[345]86. + +Mon Aug 22 11:36:40 1994 Stan Shebs (shebs@andros.cygnus.com) + + * Makefile.in (distclean): Separate from realclean. + (realclean): Remove mmalloc.info. + +Fri May 6 13:04:25 1994 Steve Chamberlain (sac@cygnus.com) + + * config/go32.mh: New file + * configure.in (host==go32): Use new fragment. + +Tue Feb 8 00:32:28 1994 Peter Schauer (pes@regent.e-technik.tu-muenchen.de) + + * mmtrace.c (tr_freehook, tr_mallochook, tr_reallochook): + Cast addresses put out via fprintf to unsigned long and use %lx. + +Tue Nov 16 20:33:17 1993 Jim Kingdon (kingdon@deneb.cygnus.com) + + * COPYING.LIB: New file (standard version 2 LGPL, as already cited + by the source files). + +Fri Nov 5 11:47:33 1993 Jim Kingdon (kingdon@lioth.cygnus.com) + + * Makefile.in (info dvi install-info): Actually make the manual. + +Mon Nov 1 14:20:25 1993 Jim Kingdon (kingdon@lioth.cygnus.com) + + * mmalloc.texi: Fix typo ("for for" -> "for"). + +Fri Jul 16 15:27:08 1993 Jim Kingdon (kingdon@rtl.cygnus.com) + + * test1.c: New file which tests for bug fixed below. + * Makefile.in (check): Put in commands to run it (but commented out + because it won't work for Canadian cross). + + * mmalloc.c (mmalloc): When extending a free block at the end of the + heap, check whether which block is at the end changed. + + * Makefile.in (TAGS): make work when srcdir != objdir. + +Thu Jul 15 07:56:47 1993 Jim Kingdon (kingdon@lioth.cygnus.com) + + * attach.c, detach.c: Include before . + +Wed Jun 30 11:00:53 1993 Jim Kingdon (kingdon@lioth.cygnus.com) + + * Makefile.in: Add mostlyclean and realclean targets. + +Wed Mar 24 01:58:12 1993 david d `zoo' zuhn (zoo at poseidon.cygnus.com) + + * Makefile.in: add dvi and installcheck targets + +Fri Mar 12 18:35:43 1993 david d `zoo' zuhn (zoo at cirdan.cygnus.com) + + * configure.in: recognize *-*-solaris2* instead of *-*-solaris* (a + number of people want to call SunOS 4.1.2 "solaris1.0" and get it right) + +Mon Feb 22 18:08:53 1993 John Gilmore (gnu@cygnus.com) + + * Makefile.in (distclean): Add. + +Tue Feb 16 08:09:15 1993 Fred Fish (fnf@cygnus.com) + + * Makefile.in, attach.c, detach.c, keys.c, mmap-sup.c, mmtrace.c, + sbrk-sup.c: Use GNU Library General Public License, like other + files. + +Wed Nov 18 19:18:59 1992 John Gilmore (gnu@cygnus.com) + + * configure.in: Regularize list of host configs. + +Fri Oct 30 00:59:46 1992 John Gilmore (gnu@cygnus.com) + + * mmalloc.texi: Add missing doubled @. Bugfix by Paul Eggert. + +Fri Oct 23 01:50:52 1992 Stu Grossman (grossman at cygnus.com) + + * configure.in: Handle solaris same as sysv4. + +Thu Oct 1 23:34:20 1992 david d `zoo' zuhn (zoo at cirdan.cygnus.com) + + * configure.in: use cpu-vendor-os triple instead of nested cases + +Sun Aug 23 11:09:46 1992 Fred Fish (fnf@cygnus.com) + + * sbrk-sup.c (__mmalloc_brk_init): Ensure base of sbrk'd region + is aligned. Bug reported by Andrew Heybey (ath@lcs.mit.edu). + +Wed Aug 19 14:49:23 1992 Ian Lance Taylor (ian@cygnus.com) + + * Makefile.in: always create installation directories. + +Mon Jul 20 21:15:44 1992 Fred Fish (fnf@cygnus.com) + + * mrealloc.c: Minor code format style changes for consistency. + +Fri Jul 3 20:25:30 1992 Fred Fish (fnf@cygnus.com) + + * attach.c, detach.c, mcalloc.c, mmalloc.c, mmtrace.c, mrealloc.c, + sbrk-sup.c: Remove "(void)" casts from function calls where the + return value is ignored, in accordance with GNU coding standards. + +Tue Jun 30 16:44:41 1992 Fred Fish (fnf@cygnus.com) + + * mmalloc.h (struct mdesc): Add FIXME comments to point out the + need to save some data on a per-process basis for mapped regions + that are shared. + * attach.c (reuse): Update the morecore field for reused mapped + regions to be correct for the current process. + +Mon Jun 29 10:45:25 1992 Fred Fish (fnf at cygnus.com) + + * mmtrace.c: Lint. + +Mon Jun 15 12:20:16 1992 Fred Fish (fnf@cygnus.com) + + * mmalloc.h (struct mdesc): Change member "errno" to + "saved_errno" to avoid possible conflict with ANSI C environments, + where it is allowed to be a macro. + * config/mh-ncr3000 (INSTALL): Don't use /usr/ucb/install, + it is broken on ncr 3000's. + * config/mh-ncr3000 (RANLIB): Use RANLIB=true. + +Fri Jun 12 21:34:21 1992 John Gilmore (gnu at cygnus.com) + + * mmap-sup.c: Avoid ANSI C "empty translation unit" idiocy. + +Tue Jun 9 17:29:04 1992 Fred Fish (fnf@cygnus.com) + + * config/{mh-ncr3000, mh-sysv4}: Add definition for INSTALL using + /usr/ucb/install. + +Thu Apr 30 22:36:31 1992 Fred Fish (fnf@cygnus.com) + + * sbrk-sup.c (sbrk_morecore): Fix sbrk() error return test. + +Mon Apr 20 21:03:30 1992 K. Richard Pixley (rich@cygnus.com) + + * Makefile.in: rework CFLAGS so that they can be passed from the + command line. remove MINUS_G. Default CFLAGS to -g. + +Thu Apr 16 20:00:21 1992 Fred Fish (fnf@cygnus.com) + + * TODO: New file. + * attach.c, mcalloc.c, mfree.c, mmalloc.c, mmalloc.h, mmap-sup.c, + mmcheck.c, mtrace.c, mrealloc.c, mvalloc.c, sbrk-sup.c: Lint. + +Fri Apr 10 22:59:17 1992 Fred Fish (fnf@cygnus.com) + + * configure.in: Recognize new ncr3000 config. + * config/mh-ncr3000: New config file. + * Makefile.in (MINUS_G): Add macro and default to -g. + +Wed Apr 8 09:34:53 1992 Fred Fish (fnf@cygnus.com) + + * mmalloc.c: Minor fix to comment. + * mmalloc.texi: Update to match actual implementation + * mmalloc.h (morecore): Change prototype's 2nd arg to int. + +Tue Apr 7 22:16:09 1992 Fred Fish (fnf@cygnus.com) + + * mmalloc.h (size_t, CHAR_BIT): Only redefine if not already + defined. + +Mon Apr 6 20:49:33 1992 Fred Fish (fnf@cygnus.com) + + * mmalloc.h: Remove include of . This also gets rid + of the ugly kludge installed on 1-Apr-92. + +Mon Apr 6 16:33:37 1992 Stu Grossman (grossman at cygnus.com) + + * detach.c (mmalloc_detach): Arg should be PTR, not void *. + Fixes complaints from non __STDC__ systems. + +Wed Apr 1 11:47:02 1992 Fred Fish (fnf@cygnus.com) + + * mcalloc.c, mfree.c, mmalloc.c, mrealloc.c: Minor comment + change. + * mmalloc.h: Add ugly kludge to band-aid over problems with + bogus vendor files. + +Sun Mar 29 12:41:31 1992 John Gilmore (gnu at cygnus.com) + + * attach.c, mmalloc.c, mmcheck.c: Lint. + +Thu Mar 26 17:06:04 1992 Fred Fish (fnf@cygnus.com) + + * attach.c (reuse): Explicitly discard return value of mmcheck. + * mmcheck.c (mmcheck): Document requirements for installing + corruption checking hooks and set up to enforce restrictions. + +Tue Mar 24 23:41:10 1992 K. Richard Pixley (rich@cygnus.com) + + * config/mh-irix4: new file. + + * Makefile.in: added standard targets, fixed install directories. + +Sat Mar 14 17:34:59 1992 Fred Fish (fnf@cygnus.com) + + * Initial release, incorporated into gdb. + + diff --git a/mmalloc/MAINTAINERS b/mmalloc/MAINTAINERS new file mode 100644 index 0000000..0904867 --- /dev/null +++ b/mmalloc/MAINTAINERS @@ -0,0 +1,5 @@ +The mmalloc directory is maintained by the GDB group's Host +maintainers. + +This code is in a maintain-only phase - only configury patches fixing +host compile problems are generally accepted. diff --git a/mmalloc/Makefile.in b/mmalloc/Makefile.in new file mode 100644 index 0000000..b05aea7 --- /dev/null +++ b/mmalloc/Makefile.in @@ -0,0 +1,247 @@ +# Copyright (C) 1992 Free Software Foundation, Inc. +# This file is part of the GNU C Library. + +# The GNU C Library is free software; you can redistribute it and/or +# modify it under the terms of the GNU Library General Public License as +# published by the Free Software Foundation; either version 2 of the +# License, or (at your option) any later version. + +# The GNU C Library is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +# Library General Public License for more details. + +# You should have received a copy of the GNU Library General Public +# License along with the GNU C Library; see the file COPYING.LIB. If +# not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, +# Boston, MA 02111-1307, USA. + +# +# Makefile for mmalloc directory +# + +# Directory containing source files. Don't clean up the spacing, +# this exact string is matched for by the "configure" script. + +VPATH = @srcdir@ +srcdir = @srcdir@ + +prefix = @prefix@ +exec_prefix = @exec_prefix@ + +bindir = @bindir@ +libdir = @libdir@ + +datadir = @datadir@ +mandir = @mandir@ +man1dir = $(mandir)/man1 +man2dir = $(mandir)/man2 +man3dir = $(mandir)/man3 +man4dir = $(mandir)/man4 +man5dir = $(mandir)/man5 +man6dir = $(mandir)/man6 +man7dir = $(mandir)/man7 +man8dir = $(mandir)/man8 +man9dir = $(mandir)/man9 +infodir = @infodir@ +includedir = @includedir@ + +SHELL = @SHELL@ + +INSTALL = @INSTALL@ +INSTALL_PROGRAM=@INSTALL_PROGRAM@ +INSTALL_DATA = @INSTALL_DATA@ + +AR = @AR@ +AR_FLAGS = qv +CFLAGS = -g +MAKEINFO = makeinfo +RANLIB = @RANLIB@ +RM = rm + +# where to find makeinfo +MAKEINFO=makeinfo + +SET_TEXINPUTS = TEXINPUTS=${TEXIDIR}:.:$(srcdir):$(READLINE_DIR):$$TEXINPUTS + +# Files which should be generated via 'info' and installed by 'install-info' +INFO_DEPS = mmalloc.info + +# The TeX formatter +TEX = tex + +TARGETLIB = libmmalloc.a + +CFILES = mcalloc.c mfree.c mmalloc.c mmcheck.c mmemalign.c mmstats.c \ + mmtrace.c mrealloc.c mvalloc.c mmap-sup.c attach.c detach.c \ + keys.c sbrk-sup.c mm.c + +HFILES = mmalloc.h + +OFILES = mcalloc.o mfree.o mmalloc.o mmcheck.o mmemalign.o mmstats.o \ + mmtrace.o mrealloc.o mvalloc.o mmap-sup.o attach.o detach.o \ + keys.o sbrk-sup.o + +DEFS = @DEFS@ + +# The current default is to build a single object module with all the mmalloc +# functions. To build a more traditional library, flip this macro definition. +#TARGETOBJS = $(OFILES) +TARGETOBJS = mm.o + +.c.o: + $(CC) -c $(CFLAGS) $(DEFS) -I. -I$(srcdir)/../include $< + +# Do we want/need any config overrides? +# + +STAGESTUFF = $(TARGETLIB) *.o + +all: $(TARGETLIB) + +info: $(INFO_DEPS) +dvi: mmalloc.dvi +clean-info: +installcheck: + +mmalloc.info: mmalloc.texi + $(MAKEINFO) -I $(srcdir) -o ./mmalloc.info mmalloc.texi + +# This file doesn't need texindex currently. +mmalloc.dvi: mmalloc.texi + $(SET_TEXINPUTS) $(TEX) mmalloc.texi + rm -f mmalloc.?? mmalloc.??s mmalloc.log mmalloc.aux mmalloc.toc + +install-info: info + $(SHELL) $(srcdir)/../mkinstalldirs $(DESTDIR)$(infodir) + @list='$(INFO_DEPS)'; \ + for file in $$list; do \ + if test -f $$file; then d=.; else d=$(srcdir); fi; \ + for ifile in `cd $$d && echo $$file $$file-[0-9] $$file-[0-9][0-9]`; do \ + if test -f $$d/$$ifile; then \ + echo " $(INSTALL_DATA) $$d/$$ifile $(DESTDIR)$(infodir)/$$ifile"; \ + $(INSTALL_DATA) $$d/$$ifile $(DESTDIR)$(infodir)/$$ifile; \ + else : ; fi; \ + done; \ + done + $(POST_INSTALL) + @if $(SHELL) -c 'install-info --version | sed 1q | fgrep -s -v -i debian' >/dev/null 2>&1; then \ + list='$(INFO_DEPS)'; \ + for file in $$list; do \ + echo " install-info --info-dir=$(DESTDIR)$(infodir) $(DESTDIR)$(infodir)/$$file";\ + install-info --info-dir=$(DESTDIR)$(infodir) $(DESTDIR)$(infodir)/$$file || :;\ + done; \ + else : ; fi + +uninstall-info: + $(PRE_UNINSTALL) + @if $(SHELL) -c 'install-info --version | sed 1q | fgrep -s -v -i debian' >/dev/null 2>&1; then \ + ii=yes; \ + else ii=; fi; \ + list='$(INFO_DEPS)'; \ + for file in $$list; do \ + test -z "$$ii" \ + || install-info --info-dir=$(DESTDIR)$(infodir) --remove $$file; \ + done + $(NORMAL_UNINSTALL) + list='$(INFO_DEPS)'; \ + for file in $$list; do \ + (cd $(DESTDIR)$(infodir) && rm -f $$file $$file-[0-9] $$file-[0-9][0-9]); \ + done + +check: test1.c +# $(CC) -g $(srcdir)/test1.c libmmalloc.a +# This loses for Canadian cross (building mmalloc with a cross-compiler). +# There is probably some dejagnu-ish solution (such as what we are doing +# for gdb, perhaps). +# ./a.out + +install: all install-info + $(SHELL) $(srcdir)/../mkinstalldirs $(DESTDIR)$(libdir) + $(INSTALL_DATA) $(TARGETLIB) $(DESTDIR)$(libdir)/$(TARGETLIB)n + $(RANLIB) $(DESTDIR)$(libdir)/$(TARGETLIB)n + mv -f $(DESTDIR)$(libdir)/$(TARGETLIB)n $(DESTDIR)$(libdir)/$(TARGETLIB) + +uninstall: uninstall-info + +$(TARGETLIB): $(TARGETOBJS) + $(RM) -rf $@ + $(AR) $(AR_FLAGS) $@ $(TARGETOBJS) + $(RANLIB) $@ + +$(OFILES) : $(HFILES) Makefile + +mm.o: $(HFILES) $(CFILES) + $(CC) -c $(CFLAGS) $(DEFS) -I. -I$(srcdir)/../include $(srcdir)/mm.c + +.always.: +# Do nothing. + +.PHONEY: all etags tags ls clean stage1 stage2 .always. + +stage1: force + -mkdir stage1 + -mv -f $(STAGESTUFF) stage1 + +stage2: force + -mkdir stage2 + -mv -f $(STAGESTUFF) stage2 + +stage3: force + -mkdir stage3 + -mv -f $(STAGESTUFF) stage3 + +stage4: force + -mkdir stage4 + -mv -f $(STAGESTUFF) stage4 + +against=stage2 + +comparison: force + for i in *.o ; do cmp $$i $(against)/$$i || exit 1 ; done + +de-stage1: force + -(cd stage1 ; mv -f * ..) + -rmdir stage1 + +de-stage2: force + -(cd stage2 ; mv -f * ..) + -rmdir stage2 + +de-stage3: force + -(cd stage3 ; mv -f * ..) + -rmdir stage3 + +de-stage4: force + -(cd stage4 ; mv -f * ..) + -rmdir stage4 + +etags tags: TAGS + +TAGS: $(CFILES) + etags `for i in $(HFILES) $(CFILES); do echo $(srcdir)/$$i ; done` + +ls: + @echo Makefile $(HFILES) $(CFILES) + +# Need to deal with profiled libraries, too. + +mostlyclean clean: + rm -f *.a *.o core errs *~ \#* TAGS *.E a.out errors + +distclean: clean + rm -f config.cache config.log config.status + rm -f Makefile depend + +maintainer-clean realclean: distclean clean + @echo "This command is intended for maintainers to use;" + @echo "it deletes files that may require special tools to rebuild." + rm -f mmalloc.info + +force: + +Makefile: Makefile.in config.status + $(SHELL) config.status + +config.status: configure + $(SHELL) config.status --recheck diff --git a/mmalloc/TODO b/mmalloc/TODO new file mode 100644 index 0000000..9412043 --- /dev/null +++ b/mmalloc/TODO @@ -0,0 +1,17 @@ +Things that still need attention: + + * Make implementation changes necessary to allow multiple processes + to use the mmalloc managed region simultaneously. This requires, + at the minimum, some sort of cooperative locking that ensures that + only one process at a time is changing any of the mmalloc managed + data structures (its ok for the mmalloc managed data regions to be + changed at any time since we don't care about their contents). + + * In order to support multiple processes using the mmalloc managed + region, the malloc descriptor needs to be broken into two parts, + one part which is specific to the given process and is maintained + separately on a per process basis, and another part which is common + to all processes. As an example, the file descriptor is specific + to a given process, as are the morecore and abortfunc pointers. + However magic[], the version number, the flags field, etc are + common to all processes. diff --git a/mmalloc/ansidecl.h b/mmalloc/ansidecl.h new file mode 100644 index 0000000..a1a765d --- /dev/null +++ b/mmalloc/ansidecl.h @@ -0,0 +1,371 @@ +/* ANSI and traditional C compatability macros + Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001 + Free Software Foundation, Inc. + This file is part of the GNU C Library. + +This program is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program; if not, write to the Free Software +Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ + +/* ANSI and traditional C compatibility macros + + ANSI C is assumed if __STDC__ is #defined. + + Macro ANSI C definition Traditional C definition + ----- ---- - ---------- ----------- - ---------- + ANSI_PROTOTYPES 1 not defined + PTR `void *' `char *' + PTRCONST `void *const' `char *' + LONG_DOUBLE `long double' `double' + const not defined `' + volatile not defined `' + signed not defined `' + VA_START(ap, var) va_start(ap, var) va_start(ap) + + Note that it is safe to write "void foo();" indicating a function + with no return value, in all K+R compilers we have been able to test. + + For declaring functions with prototypes, we also provide these: + + PARAMS ((prototype)) + -- for functions which take a fixed number of arguments. Use this + when declaring the function. When defining the function, write a + K+R style argument list. For example: + + char *strcpy PARAMS ((char *dest, char *source)); + ... + char * + strcpy (dest, source) + char *dest; + char *source; + { ... } + + + VPARAMS ((prototype, ...)) + -- for functions which take a variable number of arguments. Use + PARAMS to declare the function, VPARAMS to define it. For example: + + int printf PARAMS ((const char *format, ...)); + ... + int + printf VPARAMS ((const char *format, ...)) + { + ... + } + + For writing functions which take variable numbers of arguments, we + also provide the VA_OPEN, VA_CLOSE, and VA_FIXEDARG macros. These + hide the differences between K+R and C89 more + thoroughly than the simple VA_START() macro mentioned above. + + VA_OPEN and VA_CLOSE are used *instead of* va_start and va_end. + Immediately after VA_OPEN, put a sequence of VA_FIXEDARG calls + corresponding to the list of fixed arguments. Then use va_arg + normally to get the variable arguments, or pass your va_list object + around. You do not declare the va_list yourself; VA_OPEN does it + for you. + + Here is a complete example: + + int + printf VPARAMS ((const char *format, ...)) + { + int result; + + VA_OPEN (ap, format); + VA_FIXEDARG (ap, const char *, format); + + result = vfprintf (stdout, format, ap); + VA_CLOSE (ap); + + return result; + } + + + You can declare variables either before or after the VA_OPEN, + VA_FIXEDARG sequence. Also, VA_OPEN and VA_CLOSE are the beginning + and end of a block. They must appear at the same nesting level, + and any variables declared after VA_OPEN go out of scope at + VA_CLOSE. Unfortunately, with a K+R compiler, that includes the + argument list. You can have multiple instances of VA_OPEN/VA_CLOSE + pairs in a single function in case you need to traverse the + argument list more than once. + + For ease of writing code which uses GCC extensions but needs to be + portable to other compilers, we provide the GCC_VERSION macro that + simplifies testing __GNUC__ and __GNUC_MINOR__ together, and various + wrappers around __attribute__. Also, __extension__ will be #defined + to nothing if it doesn't work. See below. + + This header also defines a lot of obsolete macros: + CONST, VOLATILE, SIGNED, PROTO, EXFUN, DEFUN, DEFUN_VOID, + AND, DOTS, NOARGS. Don't use them. */ + +#ifndef _ANSIDECL_H +#define _ANSIDECL_H 1 + +/* Every source file includes this file, + so they will all get the switch for lint. */ +/* LINTLIBRARY */ + +/* Using MACRO(x,y) in cpp #if conditionals does not work with some + older preprocessors. Thus we can't define something like this: + +#define HAVE_GCC_VERSION(MAJOR, MINOR) \ + (__GNUC__ > (MAJOR) || (__GNUC__ == (MAJOR) && __GNUC_MINOR__ >= (MINOR))) + +and then test "#if HAVE_GCC_VERSION(2,7)". + +So instead we use the macro below and test it against specific values. */ + +/* This macro simplifies testing whether we are using gcc, and if it + is of a particular minimum version. (Both major & minor numbers are + significant.) This macro will evaluate to 0 if we are not using + gcc at all. */ +#ifndef GCC_VERSION +#define GCC_VERSION (__GNUC__ * 1000 + __GNUC_MINOR__) +#endif /* GCC_VERSION */ + +#if defined (__STDC__) || defined (_AIX) || (defined (__mips) && defined (_SYSTYPE_SVR4)) || defined(_WIN32) || (defined(__alpha) && defined(__cplusplus)) +/* All known AIX compilers implement these things (but don't always + define __STDC__). The RISC/OS MIPS compiler defines these things + in SVR4 mode, but does not define __STDC__. */ +/* eraxxon@alumni.rice.edu: The Compaq C++ compiler, unlike many other + C++ compilers, does not define __STDC__, though it acts as if this + was so. (Verified versions: 5.7, 6.2, 6.3, 6.5) */ + +#define ANSI_PROTOTYPES 1 +#define PTR void * +#define PTRCONST void *const +#define LONG_DOUBLE long double + +/* PARAMS is often defined elsewhere (e.g. by libintl.h), so wrap it in + a #ifndef. */ +#ifndef PARAMS +#define PARAMS(ARGS) ARGS +#endif + +#define VPARAMS(ARGS) ARGS +#define VA_START(VA_LIST, VAR) va_start(VA_LIST, VAR) + +/* variadic function helper macros */ +/* "struct Qdmy" swallows the semicolon after VA_OPEN/VA_FIXEDARG's + use without inhibiting further decls and without declaring an + actual variable. */ +#define VA_OPEN(AP, VAR) { va_list AP; va_start(AP, VAR); { struct Qdmy +#define VA_CLOSE(AP) } va_end(AP); } +#define VA_FIXEDARG(AP, T, N) struct Qdmy + +#undef const +#undef volatile +#undef signed + +/* inline requires special treatment; it's in C99, and GCC >=2.7 supports + it too, but it's not in C89. */ +#undef inline +#if __STDC_VERSION__ > 199901L +/* it's a keyword */ +#else +# if GCC_VERSION >= 2007 +# define inline __inline__ /* __inline__ prevents -pedantic warnings */ +# else +# define inline /* nothing */ +# endif +#endif + +/* These are obsolete. Do not use. */ +#ifndef IN_GCC +#define CONST const +#define VOLATILE volatile +#define SIGNED signed + +#define PROTO(type, name, arglist) type name arglist +#define EXFUN(name, proto) name proto +#define DEFUN(name, arglist, args) name(args) +#define DEFUN_VOID(name) name(void) +#define AND , +#define DOTS , ... +#define NOARGS void +#endif /* ! IN_GCC */ + +#else /* Not ANSI C. */ + +#undef ANSI_PROTOTYPES +#define PTR char * +#define PTRCONST PTR +#define LONG_DOUBLE double + +#define PARAMS(args) () +#define VPARAMS(args) (va_alist) va_dcl +#define VA_START(va_list, var) va_start(va_list) + +#define VA_OPEN(AP, VAR) { va_list AP; va_start(AP); { struct Qdmy +#define VA_CLOSE(AP) } va_end(AP); } +#define VA_FIXEDARG(AP, TYPE, NAME) TYPE NAME = va_arg(AP, TYPE) + +/* some systems define these in header files for non-ansi mode */ +#undef const +#undef volatile +#undef signed +#undef inline +#define const +#define volatile +#define signed +#define inline + +#ifndef IN_GCC +#define CONST +#define VOLATILE +#define SIGNED + +#define PROTO(type, name, arglist) type name () +#define EXFUN(name, proto) name() +#define DEFUN(name, arglist, args) name arglist args; +#define DEFUN_VOID(name) name() +#define AND ; +#define DOTS +#define NOARGS +#endif /* ! IN_GCC */ + +#endif /* ANSI C. */ + +/* Define macros for some gcc attributes. This permits us to use the + macros freely, and know that they will come into play for the + version of gcc in which they are supported. */ + +#if (GCC_VERSION < 2007) +# define __attribute__(x) +#endif + +/* Attribute __malloc__ on functions was valid as of gcc 2.96. */ +#ifndef ATTRIBUTE_MALLOC +# if (GCC_VERSION >= 2096) +# define ATTRIBUTE_MALLOC __attribute__ ((__malloc__)) +# else +# define ATTRIBUTE_MALLOC +# endif /* GNUC >= 2.96 */ +#endif /* ATTRIBUTE_MALLOC */ + +/* Attributes on labels were valid as of gcc 2.93. */ +#ifndef ATTRIBUTE_UNUSED_LABEL +# if (!defined (__cplusplus) && GCC_VERSION >= 2093) +# define ATTRIBUTE_UNUSED_LABEL ATTRIBUTE_UNUSED +# else +# define ATTRIBUTE_UNUSED_LABEL +# endif /* !__cplusplus && GNUC >= 2.93 */ +#endif /* ATTRIBUTE_UNUSED_LABEL */ + +#ifndef ATTRIBUTE_UNUSED +#define ATTRIBUTE_UNUSED __attribute__ ((__unused__)) +#endif /* ATTRIBUTE_UNUSED */ + +/* Before GCC 3.4, the C++ frontend couldn't parse attributes placed after the + identifier name. */ +#if ! defined(__cplusplus) || (GCC_VERSION >= 3004) +# define ARG_UNUSED(NAME) NAME ATTRIBUTE_UNUSED +#else /* !__cplusplus || GNUC >= 3.4 */ +# define ARG_UNUSED(NAME) NAME +#endif /* !__cplusplus || GNUC >= 3.4 */ + +#ifndef ATTRIBUTE_NORETURN +#define ATTRIBUTE_NORETURN __attribute__ ((__noreturn__)) +#endif /* ATTRIBUTE_NORETURN */ + +/* Attribute `nonnull' was valid as of gcc 3.3. */ +#ifndef ATTRIBUTE_NONNULL +# if (GCC_VERSION >= 3003) +# define ATTRIBUTE_NONNULL(m) __attribute__ ((__nonnull__ (m))) +# else +# define ATTRIBUTE_NONNULL(m) +# endif /* GNUC >= 3.3 */ +#endif /* ATTRIBUTE_NONNULL */ + +/* Attribute `pure' was valid as of gcc 3.0. */ +#ifndef ATTRIBUTE_PURE +# if (GCC_VERSION >= 3000) +# define ATTRIBUTE_PURE __attribute__ ((__pure__)) +# else +# define ATTRIBUTE_PURE +# endif /* GNUC >= 3.0 */ +#endif /* ATTRIBUTE_PURE */ + +/* Use ATTRIBUTE_PRINTF when the format specifier must not be NULL. + This was the case for the `printf' format attribute by itself + before GCC 3.3, but as of 3.3 we need to add the `nonnull' + attribute to retain this behavior. */ +#ifndef ATTRIBUTE_PRINTF +#define ATTRIBUTE_PRINTF(m, n) __attribute__ ((__format__ (__printf__, m, n))) ATTRIBUTE_NONNULL(m) +#define ATTRIBUTE_PRINTF_1 ATTRIBUTE_PRINTF(1, 2) +#define ATTRIBUTE_PRINTF_2 ATTRIBUTE_PRINTF(2, 3) +#define ATTRIBUTE_PRINTF_3 ATTRIBUTE_PRINTF(3, 4) +#define ATTRIBUTE_PRINTF_4 ATTRIBUTE_PRINTF(4, 5) +#define ATTRIBUTE_PRINTF_5 ATTRIBUTE_PRINTF(5, 6) +#endif /* ATTRIBUTE_PRINTF */ + +/* Use ATTRIBUTE_FPTR_PRINTF when the format attribute is to be set on + a function pointer. Format attributes were allowed on function + pointers as of gcc 3.1. */ +#ifndef ATTRIBUTE_FPTR_PRINTF +# if (GCC_VERSION >= 3001) +# define ATTRIBUTE_FPTR_PRINTF(m, n) ATTRIBUTE_PRINTF(m, n) +# else +# define ATTRIBUTE_FPTR_PRINTF(m, n) +# endif /* GNUC >= 3.1 */ +# define ATTRIBUTE_FPTR_PRINTF_1 ATTRIBUTE_FPTR_PRINTF(1, 2) +# define ATTRIBUTE_FPTR_PRINTF_2 ATTRIBUTE_FPTR_PRINTF(2, 3) +# define ATTRIBUTE_FPTR_PRINTF_3 ATTRIBUTE_FPTR_PRINTF(3, 4) +# define ATTRIBUTE_FPTR_PRINTF_4 ATTRIBUTE_FPTR_PRINTF(4, 5) +# define ATTRIBUTE_FPTR_PRINTF_5 ATTRIBUTE_FPTR_PRINTF(5, 6) +#endif /* ATTRIBUTE_FPTR_PRINTF */ + +/* Use ATTRIBUTE_NULL_PRINTF when the format specifier may be NULL. A + NULL format specifier was allowed as of gcc 3.3. */ +#ifndef ATTRIBUTE_NULL_PRINTF +# if (GCC_VERSION >= 3003) +# define ATTRIBUTE_NULL_PRINTF(m, n) __attribute__ ((__format__ (__printf__, m, n))) +# else +# define ATTRIBUTE_NULL_PRINTF(m, n) +# endif /* GNUC >= 3.3 */ +# define ATTRIBUTE_NULL_PRINTF_1 ATTRIBUTE_NULL_PRINTF(1, 2) +# define ATTRIBUTE_NULL_PRINTF_2 ATTRIBUTE_NULL_PRINTF(2, 3) +# define ATTRIBUTE_NULL_PRINTF_3 ATTRIBUTE_NULL_PRINTF(3, 4) +# define ATTRIBUTE_NULL_PRINTF_4 ATTRIBUTE_NULL_PRINTF(4, 5) +# define ATTRIBUTE_NULL_PRINTF_5 ATTRIBUTE_NULL_PRINTF(5, 6) +#endif /* ATTRIBUTE_NULL_PRINTF */ + +/* Attribute `sentinel' was valid as of gcc 3.5. */ +#ifndef ATTRIBUTE_SENTINEL +# if (GCC_VERSION >= 3005) +# define ATTRIBUTE_SENTINEL __attribute__ ((__sentinel__)) +# else +# define ATTRIBUTE_SENTINEL +# endif /* GNUC >= 3.5 */ +#endif /* ATTRIBUTE_SENTINEL */ + + +#ifndef ATTRIBUTE_ALIGNED_ALIGNOF +# if (GCC_VERSION >= 3000) +# define ATTRIBUTE_ALIGNED_ALIGNOF(m) __attribute__ ((__aligned__ (__alignof__ (m)))) +# else +# define ATTRIBUTE_ALIGNED_ALIGNOF(m) +# endif /* GNUC >= 3.0 */ +#endif /* ATTRIBUTE_ALIGNED_ALIGNOF */ + +/* We use __extension__ in some places to suppress -pedantic warnings + about GCC extensions. This feature didn't work properly before + gcc 2.8. */ +#if GCC_VERSION < 2008 +#define __extension__ +#endif + +#endif /* ansidecl.h */ diff --git a/mmalloc/attach.c b/mmalloc/attach.c new file mode 100644 index 0000000..2bd70bf --- /dev/null +++ b/mmalloc/attach.c @@ -0,0 +1,221 @@ +/* Initialization for access to a mmap'd malloc managed region. + Copyright 1992, 2000 Free Software Foundation, Inc. + + Contributed by Fred Fish at Cygnus Support. fnf@cygnus.com + +This file is part of the GNU C Library. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. */ + +#include +#include /* After sys/types.h, at least for dpx/2. */ +#include +#include +#ifdef HAVE_UNISTD_H +#include /* Prototypes for lseek */ +#endif +#include "mmprivate.h" + +#ifndef SEEK_SET +#define SEEK_SET 0 +#endif + + +#if defined(HAVE_MMAP) + +/* Forward declarations/prototypes for local functions */ + +static struct mdesc *reuse PARAMS ((int)); + +/* Initialize access to a mmalloc managed region. + + If FD is a valid file descriptor for an open file then data for the + mmalloc managed region is mapped to that file, otherwise "/dev/zero" + is used and the data will not exist in any filesystem object. + + If the open file corresponding to FD is from a previous use of + mmalloc and passes some basic sanity checks to ensure that it is + compatible with the current mmalloc package, then it's data is + mapped in and is immediately accessible at the same addresses in + the current process as the process that created the file. + + If BASEADDR is not NULL, the mapping is established starting at the + specified address in the process address space. If BASEADDR is NULL, + the mmalloc package chooses a suitable address at which to start the + mapped region, which will be the value of the previous mapping if + opening an existing file which was previously built by mmalloc, or + for new files will be a value chosen by mmap. + + Specifying BASEADDR provides more control over where the regions + start and how big they can be before bumping into existing mapped + regions or future mapped regions. + + On success, returns a "malloc descriptor" which is used in subsequent + calls to other mmalloc package functions. It is explicitly "void *" + ("char *" for systems that don't fully support void) so that users + of the package don't have to worry about the actual implementation + details. + + On failure returns NULL. */ + +PTR +mmalloc_attach (fd, baseaddr) + int fd; + PTR baseaddr; +{ + struct mdesc mtemp; + struct mdesc *mdp; + PTR mbase; + struct stat sbuf; + + /* First check to see if FD is a valid file descriptor, and if so, see + if the file has any current contents (size > 0). If it does, then + attempt to reuse the file. If we can't reuse the file, either + because it isn't a valid mmalloc produced file, was produced by an + obsolete version, or any other reason, then we fail to attach to + this file. */ + + if (fd >= 0) + { + if (fstat (fd, &sbuf) < 0) + { + return (NULL); + } + else if (sbuf.st_size > 0) + { + return ((PTR) reuse (fd)); + } + } + + /* We start off with the malloc descriptor allocated on the stack, until + we build it up enough to call _mmalloc_mmap_morecore() to allocate the + first page of the region and copy it there. Ensure that it is zero'd and + then initialize the fields that we know values for. */ + + mdp = &mtemp; + memset ((char *) mdp, 0, sizeof (mtemp)); + strncpy (mdp -> magic, MMALLOC_MAGIC, MMALLOC_MAGIC_SIZE); + mdp -> headersize = sizeof (mtemp); + mdp -> version = MMALLOC_VERSION; + mdp -> morecore = __mmalloc_mmap_morecore; + mdp -> fd = fd; + mdp -> base = mdp -> breakval = mdp -> top = baseaddr; + + /* If we have not been passed a valid open file descriptor for the file + to map to, then open /dev/zero and use that to map to. */ + + if (mdp -> fd < 0) + { + if ((mdp -> fd = open ("/dev/zero", O_RDWR)) < 0) + { + return (NULL); + } + else + { + mdp -> flags |= MMALLOC_DEVZERO; + } + } + + /* Now try to map in the first page, copy the malloc descriptor structure + there, and arrange to return a pointer to this new copy. If the mapping + fails, then close the file descriptor if it was opened by us, and arrange + to return a NULL. */ + + if ((mbase = mdp -> morecore (mdp, sizeof (mtemp))) != NULL) + { + memcpy (mbase, mdp, sizeof (mtemp)); + mdp = (struct mdesc *) mbase; + } + else + { + if (mdp -> flags & MMALLOC_DEVZERO) + { + close (mdp -> fd); + } + mdp = NULL; + } + + return ((PTR) mdp); +} + +/* Given an valid file descriptor on an open file, test to see if that file + is a valid mmalloc produced file, and if so, attempt to remap it into the + current process at the same address to which it was previously mapped. + + Note that we have to update the file descriptor number in the malloc- + descriptor read from the file to match the current valid one, before + trying to map the file in, and again after a successful mapping and + after we've switched over to using the mapped in malloc descriptor + rather than the temporary one on the stack. + + Once we've switched over to using the mapped in malloc descriptor, we + have to update the pointer to the morecore function, since it almost + certainly will be at a different address if the process reusing the + mapped region is from a different executable. + + Also note that if the heap being remapped previously used the mmcheckf() + routines, we need to update the hooks since their target functions + will have certainly moved if the executable has changed in any way. + We do this by calling mmcheckf() internally. + + Returns a pointer to the malloc descriptor if successful, or NULL if + unsuccessful for some reason. */ + +static struct mdesc * +reuse (fd) + int fd; +{ + struct mdesc mtemp; + struct mdesc *mdp = NULL; + + if ((lseek (fd, 0L, SEEK_SET) == 0) && + (read (fd, (char *) &mtemp, sizeof (mtemp)) == sizeof (mtemp)) && + (mtemp.headersize == sizeof (mtemp)) && + (strcmp (mtemp.magic, MMALLOC_MAGIC) == 0) && + (mtemp.version <= MMALLOC_VERSION)) + { + mtemp.fd = fd; + if (__mmalloc_remap_core (&mtemp) == mtemp.base) + { + mdp = (struct mdesc *) mtemp.base; + mdp -> fd = fd; + mdp -> morecore = __mmalloc_mmap_morecore; + if (mdp -> mfree_hook != NULL) + { + mmcheckf ((PTR) mdp, (void (*) PARAMS ((void))) NULL, 1); + } + } + } + return (mdp); +} + +#else /* !defined (HAVE_MMAP) */ + +/* For systems without mmap, the library still supplies an entry point + to link to, but trying to initialize access to an mmap'd managed region + always fails. */ + +/* ARGSUSED */ +PTR +mmalloc_attach (fd, baseaddr) + int fd; + PTR baseaddr; +{ + return (NULL); +} + +#endif /* defined (HAVE_MMAP) */ + diff --git a/mmalloc/configure b/mmalloc/configure new file mode 100755 index 0000000..71331d0 --- /dev/null +++ b/mmalloc/configure @@ -0,0 +1,4351 @@ +#! /bin/sh +# Guess values for system-dependent variables and create Makefiles. +# Generated by GNU Autoconf 2.59. +# +# Copyright (C) 2003 Free Software Foundation, Inc. +# This configure script is free software; the Free Software Foundation +# gives unlimited permission to copy, distribute and modify it. +## --------------------- ## +## M4sh Initialization. ## +## --------------------- ## + +# Be Bourne compatible +if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then + emulate sh + NULLCMD=: + # Zsh 3.x and 4.x performs word splitting on ${1+"$@"}, which + # is contrary to our usage. Disable this feature. + alias -g '${1+"$@"}'='"$@"' +elif test -n "${BASH_VERSION+set}" && (set -o posix) >/dev/null 2>&1; then + set -o posix +fi +DUALCASE=1; export DUALCASE # for MKS sh + +# Support unset when possible. +if ( (MAIL=60; unset MAIL) || exit) >/dev/null 2>&1; then + as_unset=unset +else + as_unset=false +fi + + +# Work around bugs in pre-3.0 UWIN ksh. +$as_unset ENV MAIL MAILPATH +PS1='$ ' +PS2='> ' +PS4='+ ' + +# NLS nuisances. +for as_var in \ + LANG LANGUAGE LC_ADDRESS LC_ALL LC_COLLATE LC_CTYPE LC_IDENTIFICATION \ + LC_MEASUREMENT LC_MESSAGES LC_MONETARY LC_NAME LC_NUMERIC LC_PAPER \ + LC_TELEPHONE LC_TIME +do + if (set +x; test -z "`(eval $as_var=C; export $as_var) 2>&1`"); then + eval $as_var=C; export $as_var + else + $as_unset $as_var + fi +done + +# Required to use basename. +if expr a : '\(a\)' >/dev/null 2>&1; then + as_expr=expr +else + as_expr=false +fi + +if (basename /) >/dev/null 2>&1 && test "X`basename / 2>&1`" = "X/"; then + as_basename=basename +else + as_basename=false +fi + + +# Name of the executable. +as_me=`$as_basename "$0" || +$as_expr X/"$0" : '.*/\([^/][^/]*\)/*$' \| \ + X"$0" : 'X\(//\)$' \| \ + X"$0" : 'X\(/\)$' \| \ + . : '\(.\)' 2>/dev/null || +echo X/"$0" | + sed '/^.*\/\([^/][^/]*\)\/*$/{ s//\1/; q; } + /^X\/\(\/\/\)$/{ s//\1/; q; } + /^X\/\(\/\).*/{ s//\1/; q; } + s/.*/./; q'` + + +# PATH needs CR, and LINENO needs CR and PATH. +# Avoid depending upon Character Ranges. +as_cr_letters='abcdefghijklmnopqrstuvwxyz' +as_cr_LETTERS='ABCDEFGHIJKLMNOPQRSTUVWXYZ' +as_cr_Letters=$as_cr_letters$as_cr_LETTERS +as_cr_digits='0123456789' +as_cr_alnum=$as_cr_Letters$as_cr_digits + +# The user is always right. +if test "${PATH_SEPARATOR+set}" != set; then + echo "#! /bin/sh" >conf$$.sh + echo "exit 0" >>conf$$.sh + chmod +x conf$$.sh + if (PATH="/nonexistent;."; conf$$.sh) >/dev/null 2>&1; then + PATH_SEPARATOR=';' + else + PATH_SEPARATOR=: + fi + rm -f conf$$.sh +fi + + + as_lineno_1=$LINENO + as_lineno_2=$LINENO + as_lineno_3=`(expr $as_lineno_1 + 1) 2>/dev/null` + test "x$as_lineno_1" != "x$as_lineno_2" && + test "x$as_lineno_3" = "x$as_lineno_2" || { + # Find who we are. Look in the path if we contain no path at all + # relative or not. + case $0 in + *[\\/]* ) as_myself=$0 ;; + *) as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + test -r "$as_dir/$0" && as_myself=$as_dir/$0 && break +done + + ;; + esac + # We did not find ourselves, most probably we were run as `sh COMMAND' + # in which case we are not to be found in the path. + if test "x$as_myself" = x; then + as_myself=$0 + fi + if test ! -f "$as_myself"; then + { echo "$as_me: error: cannot find myself; rerun with an absolute path" >&2 + { (exit 1); exit 1; }; } + fi + case $CONFIG_SHELL in + '') + as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in /bin$PATH_SEPARATOR/usr/bin$PATH_SEPARATOR$PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for as_base in sh bash ksh sh5; do + case $as_dir in + /*) + if ("$as_dir/$as_base" -c ' + as_lineno_1=$LINENO + as_lineno_2=$LINENO + as_lineno_3=`(expr $as_lineno_1 + 1) 2>/dev/null` + test "x$as_lineno_1" != "x$as_lineno_2" && + test "x$as_lineno_3" = "x$as_lineno_2" ') 2>/dev/null; then + $as_unset BASH_ENV || test "${BASH_ENV+set}" != set || { BASH_ENV=; export BASH_ENV; } + $as_unset ENV || test "${ENV+set}" != set || { ENV=; export ENV; } + CONFIG_SHELL=$as_dir/$as_base + export CONFIG_SHELL + exec "$CONFIG_SHELL" "$0" ${1+"$@"} + fi;; + esac + done +done +;; + esac + + # Create $as_me.lineno as a copy of $as_myself, but with $LINENO + # uniformly replaced by the line number. The first 'sed' inserts a + # line-number line before each line; the second 'sed' does the real + # work. The second script uses 'N' to pair each line-number line + # with the numbered line, and appends trailing '-' during + # substitution so that $LINENO is not a special case at line end. + # (Raja R Harinath suggested sed '=', and Paul Eggert wrote the + # second 'sed' script. Blame Lee E. McMahon for sed's syntax. :-) + sed '=' <$as_myself | + sed ' + N + s,$,-, + : loop + s,^\(['$as_cr_digits']*\)\(.*\)[$]LINENO\([^'$as_cr_alnum'_]\),\1\2\1\3, + t loop + s,-$,, + s,^['$as_cr_digits']*\n,, + ' >$as_me.lineno && + chmod +x $as_me.lineno || + { echo "$as_me: error: cannot create $as_me.lineno; rerun with a POSIX shell" >&2 + { (exit 1); exit 1; }; } + + # Don't try to exec as it changes $[0], causing all sort of problems + # (the dirname of $[0] is not the place where we might find the + # original and so on. 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then + srcdir=.. + fi +else + ac_srcdir_defaulted=no +fi +if test ! -r $srcdir/$ac_unique_file; then + if test "$ac_srcdir_defaulted" = yes; then + { echo "$as_me: error: cannot find sources ($ac_unique_file) in $ac_confdir or .." >&2 + { (exit 1); exit 1; }; } + else + { echo "$as_me: error: cannot find sources ($ac_unique_file) in $srcdir" >&2 + { (exit 1); exit 1; }; } + fi +fi +(cd $srcdir && test -r ./$ac_unique_file) 2>/dev/null || + { echo "$as_me: error: sources are in $srcdir, but \`cd $srcdir' does not work" >&2 + { (exit 1); exit 1; }; } +srcdir=`echo "$srcdir" | sed 's%\([^\\/]\)[\\/]*$%\1%'` +ac_env_build_alias_set=${build_alias+set} +ac_env_build_alias_value=$build_alias +ac_cv_env_build_alias_set=${build_alias+set} +ac_cv_env_build_alias_value=$build_alias +ac_env_host_alias_set=${host_alias+set} +ac_env_host_alias_value=$host_alias +ac_cv_env_host_alias_set=${host_alias+set} +ac_cv_env_host_alias_value=$host_alias +ac_env_target_alias_set=${target_alias+set} +ac_env_target_alias_value=$target_alias +ac_cv_env_target_alias_set=${target_alias+set} +ac_cv_env_target_alias_value=$target_alias +ac_env_CC_set=${CC+set} +ac_env_CC_value=$CC +ac_cv_env_CC_set=${CC+set} +ac_cv_env_CC_value=$CC +ac_env_CFLAGS_set=${CFLAGS+set} +ac_env_CFLAGS_value=$CFLAGS +ac_cv_env_CFLAGS_set=${CFLAGS+set} +ac_cv_env_CFLAGS_value=$CFLAGS +ac_env_LDFLAGS_set=${LDFLAGS+set} +ac_env_LDFLAGS_value=$LDFLAGS +ac_cv_env_LDFLAGS_set=${LDFLAGS+set} +ac_cv_env_LDFLAGS_value=$LDFLAGS +ac_env_CPPFLAGS_set=${CPPFLAGS+set} +ac_env_CPPFLAGS_value=$CPPFLAGS +ac_cv_env_CPPFLAGS_set=${CPPFLAGS+set} +ac_cv_env_CPPFLAGS_value=$CPPFLAGS +ac_env_CPP_set=${CPP+set} +ac_env_CPP_value=$CPP +ac_cv_env_CPP_set=${CPP+set} +ac_cv_env_CPP_value=$CPP + +# +# Report the --help message. +# +if test "$ac_init_help" = "long"; 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See below for descriptions of some of the useful variables. + +Defaults for the options are specified in brackets. + +Configuration: + -h, --help display this help and exit + --help=short display options specific to this package + --help=recursive display the short help of all the included packages + -V, --version display version information and exit + -q, --quiet, --silent do not print \`checking...' messages + --cache-file=FILE cache test results in FILE [disabled] + -C, --config-cache alias for \`--cache-file=config.cache' + -n, --no-create do not create output files + --srcdir=DIR find the sources in DIR [configure dir or \`..'] + +_ACEOF + + cat <<_ACEOF +Installation directories: + --prefix=PREFIX install architecture-independent files in PREFIX + [$ac_default_prefix] + --exec-prefix=EPREFIX install architecture-dependent files in EPREFIX + [PREFIX] + +By default, \`make install' will install all the files in +\`$ac_default_prefix/bin', \`$ac_default_prefix/lib' etc. You can specify +an installation prefix other than \`$ac_default_prefix' using \`--prefix', +for instance \`--prefix=\$HOME'. + +For better control, use the options below. + +Fine tuning of the installation directories: + --bindir=DIR user executables [EPREFIX/bin] + --sbindir=DIR system admin executables [EPREFIX/sbin] + --libexecdir=DIR program executables [EPREFIX/libexec] + --datadir=DIR read-only architecture-independent data [PREFIX/share] + --sysconfdir=DIR read-only single-machine data [PREFIX/etc] + --sharedstatedir=DIR modifiable architecture-independent data [PREFIX/com] + --localstatedir=DIR modifiable single-machine data [PREFIX/var] + --libdir=DIR object code libraries [EPREFIX/lib] + --includedir=DIR C header files [PREFIX/include] + --oldincludedir=DIR C header files for non-gcc [/usr/include] + --infodir=DIR info documentation [PREFIX/info] + --mandir=DIR man documentation [PREFIX/man] +_ACEOF + + cat <<\_ACEOF +_ACEOF +fi + +if test -n "$ac_init_help"; then + + cat <<\_ACEOF + +Some influential environment variables: + CC C compiler command + CFLAGS C compiler flags + LDFLAGS linker flags, e.g. -L if you have libraries in a + nonstandard directory + CPPFLAGS C/C++ preprocessor flags, e.g. -I if you have + headers in a nonstandard directory + CPP C preprocessor + +Use these variables to override the choices made by `configure' or to help +it to find libraries and programs with nonstandard names/locations. + +_ACEOF +fi + +if test "$ac_init_help" = "recursive"; then + # If there are subdirs, report their specific --help. + ac_popdir=`pwd` + for ac_dir in : $ac_subdirs_all; do test "x$ac_dir" = x: && continue + test -d $ac_dir || continue + ac_builddir=. + +if test "$ac_dir" != .; then + ac_dir_suffix=/`echo "$ac_dir" | sed 's,^\.[\\/],,'` + # A "../" for each directory in $ac_dir_suffix. + ac_top_builddir=`echo "$ac_dir_suffix" | sed 's,/[^\\/]*,../,g'` +else + ac_dir_suffix= ac_top_builddir= +fi + +case $srcdir in + .) # No --srcdir option. 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We remove comments because anyway the quotes in there +# would cause problems or look ugly. +# WARNING: Be sure not to use single quotes in there, as some shells, +# such as our DU 5.0 friend, will then `close' the trap. +trap 'exit_status=$? + # Save into config.log some information that might help in debugging. + { + echo + + cat <<\_ASBOX +## ---------------- ## +## Cache variables. ## +## ---------------- ## +_ASBOX + echo + # The following way of writing the cache mishandles newlines in values, +{ + (set) 2>&1 | + case `(ac_space='"'"' '"'"'; set | grep ac_space) 2>&1` in + *ac_space=\ *) + sed -n \ + "s/'"'"'/'"'"'\\\\'"'"''"'"'/g; + s/^\\([_$as_cr_alnum]*_cv_[_$as_cr_alnum]*\\)=\\(.*\\)/\\1='"'"'\\2'"'"'/p" + ;; + *) + sed -n \ + "s/^\\([_$as_cr_alnum]*_cv_[_$as_cr_alnum]*\\)=\\(.*\\)/\\1=\\2/p" + ;; + esac; +} + echo + + cat <<\_ASBOX +## ----------------- ## +## Output variables. ## +## ----------------- ## +_ASBOX + echo + for ac_var in $ac_subst_vars + do + eval ac_val=$`echo $ac_var` + echo "$ac_var='"'"'$ac_val'"'"'" + done | sort + echo + + if test -n "$ac_subst_files"; then + cat <<\_ASBOX +## ------------- ## +## Output files. ## +## ------------- ## +_ASBOX + echo + for ac_var in $ac_subst_files + do + eval ac_val=$`echo $ac_var` + echo "$ac_var='"'"'$ac_val'"'"'" + done | sort + echo + fi + + if test -s confdefs.h; then + cat <<\_ASBOX +## ----------- ## +## confdefs.h. ## +## ----------- ## +_ASBOX + echo + sed "/^$/d" confdefs.h | sort + echo + fi + test "$ac_signal" != 0 && + echo "$as_me: caught signal $ac_signal" + echo "$as_me: exit $exit_status" + } >&5 + rm -f core *.core && + rm -rf conftest* confdefs* conf$$* $ac_clean_files && + exit $exit_status + ' 0 +for ac_signal in 1 2 13 15; do + trap 'ac_signal='$ac_signal'; { (exit 1); exit 1; }' $ac_signal +done +ac_signal=0 + +# confdefs.h avoids OS command line length limits that DEFS can exceed. +rm -rf conftest* confdefs.h +# AIX cpp loses on an empty file, so make sure it contains at least a newline. +echo >confdefs.h + +# Predefined preprocessor variables. + +cat >>confdefs.h <<_ACEOF +#define PACKAGE_NAME "$PACKAGE_NAME" +_ACEOF + + +cat >>confdefs.h <<_ACEOF +#define PACKAGE_TARNAME "$PACKAGE_TARNAME" +_ACEOF + + +cat >>confdefs.h <<_ACEOF +#define PACKAGE_VERSION "$PACKAGE_VERSION" +_ACEOF + + +cat >>confdefs.h <<_ACEOF +#define PACKAGE_STRING "$PACKAGE_STRING" +_ACEOF + + +cat >>confdefs.h <<_ACEOF +#define PACKAGE_BUGREPORT "$PACKAGE_BUGREPORT" +_ACEOF + + +# Let the site file select an alternate cache file if it wants to. +# Prefer explicitly selected file to automatically selected ones. +if test -z "$CONFIG_SITE"; then + if test "x$prefix" != xNONE; then + CONFIG_SITE="$prefix/share/config.site $prefix/etc/config.site" + else + CONFIG_SITE="$ac_default_prefix/share/config.site $ac_default_prefix/etc/config.site" + fi +fi +for ac_site_file in $CONFIG_SITE; do + if test -r "$ac_site_file"; then + { echo "$as_me:$LINENO: loading site script $ac_site_file" >&5 +echo "$as_me: loading site script $ac_site_file" >&6;} + sed 's/^/| /' "$ac_site_file" >&5 + . "$ac_site_file" + fi +done + +if test -r "$cache_file"; then + # Some versions of bash will fail to source /dev/null (special + # files actually), so we avoid doing that. + if test -f "$cache_file"; then + { echo "$as_me:$LINENO: loading cache $cache_file" >&5 +echo "$as_me: loading cache $cache_file" >&6;} + case $cache_file in + [\\/]* | ?:[\\/]* ) . $cache_file;; + *) . ./$cache_file;; + esac + fi +else + { echo "$as_me:$LINENO: creating cache $cache_file" >&5 +echo "$as_me: creating cache $cache_file" >&6;} + >$cache_file +fi + +# Check that the precious variables saved in the cache have kept the same +# value. +ac_cache_corrupted=false +for ac_var in `(set) 2>&1 | + sed -n 's/^ac_env_\([a-zA-Z_0-9]*\)_set=.*/\1/p'`; do + eval ac_old_set=\$ac_cv_env_${ac_var}_set + eval ac_new_set=\$ac_env_${ac_var}_set + eval ac_old_val="\$ac_cv_env_${ac_var}_value" + eval ac_new_val="\$ac_env_${ac_var}_value" + case $ac_old_set,$ac_new_set in + set,) + { echo "$as_me:$LINENO: error: \`$ac_var' was set to \`$ac_old_val' in the previous run" >&5 +echo "$as_me: error: \`$ac_var' was set to \`$ac_old_val' in the previous run" >&2;} + ac_cache_corrupted=: ;; + ,set) + { echo "$as_me:$LINENO: error: \`$ac_var' was not set in the previous run" >&5 +echo "$as_me: error: \`$ac_var' was not set in the previous run" >&2;} + ac_cache_corrupted=: ;; + ,);; + *) + if test "x$ac_old_val" != "x$ac_new_val"; then + { echo "$as_me:$LINENO: error: \`$ac_var' has changed since the previous run:" >&5 +echo "$as_me: error: \`$ac_var' has changed since the previous run:" >&2;} + { echo "$as_me:$LINENO: former value: $ac_old_val" >&5 +echo "$as_me: former value: $ac_old_val" >&2;} + { echo "$as_me:$LINENO: current value: $ac_new_val" >&5 +echo "$as_me: current value: $ac_new_val" >&2;} + ac_cache_corrupted=: + fi;; + esac + # Pass precious variables to config.status. + if test "$ac_new_set" = set; then + case $ac_new_val in + *" "*|*" "*|*[\[\]\~\#\$\^\&\*\(\)\{\}\\\|\;\<\>\?\"\']*) + ac_arg=$ac_var=`echo "$ac_new_val" | sed "s/'/'\\\\\\\\''/g"` ;; + *) ac_arg=$ac_var=$ac_new_val ;; + esac + case " $ac_configure_args " in + *" '$ac_arg' "*) ;; # Avoid dups. 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then + # Extract the first word of "${ac_tool_prefix}gcc", so it can be a program name with args. +set dummy ${ac_tool_prefix}gcc; ac_word=$2 +echo "$as_me:$LINENO: checking for $ac_word" >&5 +echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6 +if test "${ac_cv_prog_CC+set}" = set; then + echo $ECHO_N "(cached) $ECHO_C" >&6 +else + if test -n "$CC"; then + ac_cv_prog_CC="$CC" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + ac_cv_prog_CC="${ac_tool_prefix}gcc" + echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done +done + +fi +fi +CC=$ac_cv_prog_CC +if test -n "$CC"; then + echo "$as_me:$LINENO: result: $CC" >&5 +echo "${ECHO_T}$CC" >&6 +else + echo "$as_me:$LINENO: result: no" >&5 +echo "${ECHO_T}no" >&6 +fi + +fi +if test -z "$ac_cv_prog_CC"; then + ac_ct_CC=$CC + # Extract the first word of "gcc", so it can be a program name with args. +set dummy gcc; ac_word=$2 +echo "$as_me:$LINENO: checking for $ac_word" >&5 +echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6 +if test "${ac_cv_prog_ac_ct_CC+set}" = set; then + echo $ECHO_N "(cached) $ECHO_C" >&6 +else + if test -n "$ac_ct_CC"; then + ac_cv_prog_ac_ct_CC="$ac_ct_CC" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + ac_cv_prog_ac_ct_CC="gcc" + echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done +done + +fi +fi +ac_ct_CC=$ac_cv_prog_ac_ct_CC +if test -n "$ac_ct_CC"; then + echo "$as_me:$LINENO: result: $ac_ct_CC" >&5 +echo "${ECHO_T}$ac_ct_CC" >&6 +else + echo "$as_me:$LINENO: result: no" >&5 +echo "${ECHO_T}no" >&6 +fi + + CC=$ac_ct_CC +else + CC="$ac_cv_prog_CC" +fi + +if test -z "$CC"; then + if test -n "$ac_tool_prefix"; then + # Extract the first word of "${ac_tool_prefix}cc", so it can be a program name with args. +set dummy ${ac_tool_prefix}cc; ac_word=$2 +echo "$as_me:$LINENO: checking for $ac_word" >&5 +echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6 +if test "${ac_cv_prog_CC+set}" = set; then + echo $ECHO_N "(cached) $ECHO_C" >&6 +else + if test -n "$CC"; then + ac_cv_prog_CC="$CC" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + ac_cv_prog_CC="${ac_tool_prefix}cc" + echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done +done + +fi +fi +CC=$ac_cv_prog_CC +if test -n "$CC"; then + echo "$as_me:$LINENO: result: $CC" >&5 +echo "${ECHO_T}$CC" >&6 +else + echo "$as_me:$LINENO: result: no" >&5 +echo "${ECHO_T}no" >&6 +fi + +fi +if test -z "$ac_cv_prog_CC"; then + ac_ct_CC=$CC + # Extract the first word of "cc", so it can be a program name with args. +set dummy cc; ac_word=$2 +echo "$as_me:$LINENO: checking for $ac_word" >&5 +echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6 +if test "${ac_cv_prog_ac_ct_CC+set}" = set; then + echo $ECHO_N "(cached) $ECHO_C" >&6 +else + if test -n "$ac_ct_CC"; then + ac_cv_prog_ac_ct_CC="$ac_ct_CC" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + ac_cv_prog_ac_ct_CC="cc" + echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done +done + +fi +fi +ac_ct_CC=$ac_cv_prog_ac_ct_CC +if test -n "$ac_ct_CC"; then + echo "$as_me:$LINENO: result: $ac_ct_CC" >&5 +echo "${ECHO_T}$ac_ct_CC" >&6 +else + echo "$as_me:$LINENO: result: no" >&5 +echo "${ECHO_T}no" >&6 +fi + + CC=$ac_ct_CC +else + CC="$ac_cv_prog_CC" +fi + +fi +if test -z "$CC"; then + # Extract the first word of "cc", so it can be a program name with args. +set dummy cc; ac_word=$2 +echo "$as_me:$LINENO: checking for $ac_word" >&5 +echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6 +if test "${ac_cv_prog_CC+set}" = set; then + echo $ECHO_N "(cached) $ECHO_C" >&6 +else + if test -n "$CC"; then + ac_cv_prog_CC="$CC" # Let the user override the test. +else + ac_prog_rejected=no +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + if test "$as_dir/$ac_word$ac_exec_ext" = "/usr/ucb/cc"; then + ac_prog_rejected=yes + continue + fi + ac_cv_prog_CC="cc" + echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done +done + +if test $ac_prog_rejected = yes; then + # We found a bogon in the path, so make sure we never use it. + set dummy $ac_cv_prog_CC + shift + if test $# != 0; then + # We chose a different compiler from the bogus one. + # However, it has the same basename, so the bogon will be chosen + # first if we set CC to just the basename; use the full file name. + shift + ac_cv_prog_CC="$as_dir/$ac_word${1+' '}$@" + fi +fi +fi +fi +CC=$ac_cv_prog_CC +if test -n "$CC"; then + echo "$as_me:$LINENO: result: $CC" >&5 +echo "${ECHO_T}$CC" >&6 +else + echo "$as_me:$LINENO: result: no" >&5 +echo "${ECHO_T}no" >&6 +fi + +fi +if test -z "$CC"; then + if test -n "$ac_tool_prefix"; then + for ac_prog in cl + do + # Extract the first word of "$ac_tool_prefix$ac_prog", so it can be a program name with args. +set dummy $ac_tool_prefix$ac_prog; ac_word=$2 +echo "$as_me:$LINENO: checking for $ac_word" >&5 +echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6 +if test "${ac_cv_prog_CC+set}" = set; then + echo $ECHO_N "(cached) $ECHO_C" >&6 +else + if test -n "$CC"; then + ac_cv_prog_CC="$CC" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + ac_cv_prog_CC="$ac_tool_prefix$ac_prog" + echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done +done + +fi +fi +CC=$ac_cv_prog_CC +if test -n "$CC"; then + echo "$as_me:$LINENO: result: $CC" >&5 +echo "${ECHO_T}$CC" >&6 +else + echo "$as_me:$LINENO: result: no" >&5 +echo "${ECHO_T}no" >&6 +fi + + test -n "$CC" && break + done +fi +if test -z "$CC"; then + ac_ct_CC=$CC + for ac_prog in cl +do + # Extract the first word of "$ac_prog", so it can be a program name with args. +set dummy $ac_prog; ac_word=$2 +echo "$as_me:$LINENO: checking for $ac_word" >&5 +echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6 +if test "${ac_cv_prog_ac_ct_CC+set}" = set; then + echo $ECHO_N "(cached) $ECHO_C" >&6 +else + if test -n "$ac_ct_CC"; then + ac_cv_prog_ac_ct_CC="$ac_ct_CC" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + ac_cv_prog_ac_ct_CC="$ac_prog" + echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done +done + +fi +fi +ac_ct_CC=$ac_cv_prog_ac_ct_CC +if test -n "$ac_ct_CC"; then + echo "$as_me:$LINENO: result: $ac_ct_CC" >&5 +echo "${ECHO_T}$ac_ct_CC" >&6 +else + echo "$as_me:$LINENO: result: no" >&5 +echo "${ECHO_T}no" >&6 +fi + + test -n "$ac_ct_CC" && break +done + + CC=$ac_ct_CC +fi + +fi + + +test -z "$CC" && { { echo "$as_me:$LINENO: error: no acceptable C compiler found in \$PATH +See \`config.log' for more details." >&5 +echo "$as_me: error: no acceptable C compiler found in \$PATH +See \`config.log' for more details." >&2;} + { (exit 1); exit 1; }; } + +# Provide some information about the compiler. +echo "$as_me:$LINENO:" \ + "checking for C compiler version" >&5 +ac_compiler=`set X $ac_compile; echo $2` +{ (eval echo "$as_me:$LINENO: \"$ac_compiler --version &5\"") >&5 + (eval $ac_compiler --version &5) 2>&5 + ac_status=$? + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); } +{ (eval echo "$as_me:$LINENO: \"$ac_compiler -v &5\"") >&5 + (eval $ac_compiler -v &5) 2>&5 + ac_status=$? + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); } +{ (eval echo "$as_me:$LINENO: \"$ac_compiler -V &5\"") >&5 + (eval $ac_compiler -V &5) 2>&5 + ac_status=$? + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); } + +cat >conftest.$ac_ext <<_ACEOF +/* confdefs.h. */ +_ACEOF +cat confdefs.h >>conftest.$ac_ext +cat >>conftest.$ac_ext <<_ACEOF +/* end confdefs.h. */ + +int +main () +{ + + ; + return 0; +} +_ACEOF +ac_clean_files_save=$ac_clean_files +ac_clean_files="$ac_clean_files a.out a.exe b.out" +# Try to create an executable without -o first, disregard a.out. +# It will help us diagnose broken compilers, and finding out an intuition +# of exeext. +echo "$as_me:$LINENO: checking for C compiler default output file name" >&5 +echo $ECHO_N "checking for C compiler default output file name... $ECHO_C" >&6 +ac_link_default=`echo "$ac_link" | sed 's/ -o *conftest[^ ]*//'` +if { (eval echo "$as_me:$LINENO: \"$ac_link_default\"") >&5 + (eval $ac_link_default) 2>&5 + ac_status=$? + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); }; then + # Find the output, starting from the most likely. This scheme is +# not robust to junk in `.', hence go to wildcards (a.*) only as a last +# resort. + +# Be careful to initialize this variable, since it used to be cached. +# Otherwise an old cache value of `no' led to `EXEEXT = no' in a Makefile. +ac_cv_exeext= +# b.out is created by i960 compilers. +for ac_file in a_out.exe a.exe conftest.exe a.out conftest a.* conftest.* b.out +do + test -f "$ac_file" || continue + case $ac_file in + *.$ac_ext | *.xcoff | *.tds | *.d | *.pdb | *.xSYM | *.bb | *.bbg | *.o | *.obj ) + ;; + conftest.$ac_ext ) + # This is the source file. + ;; + [ab].out ) + # We found the default executable, but exeext='' is most + # certainly right. + break;; + *.* ) + ac_cv_exeext=`expr "$ac_file" : '[^.]*\(\..*\)'` + # FIXME: I believe we export ac_cv_exeext for Libtool, + # but it would be cool to find out if it's true. Does anybody + # maintain Libtool? --akim. + export ac_cv_exeext + break;; + * ) + break;; + esac +done +else + echo "$as_me: failed program was:" >&5 +sed 's/^/| /' conftest.$ac_ext >&5 + +{ { echo "$as_me:$LINENO: error: C compiler cannot create executables +See \`config.log' for more details." >&5 +echo "$as_me: error: C compiler cannot create executables +See \`config.log' for more details." >&2;} + { (exit 77); exit 77; }; } +fi + +ac_exeext=$ac_cv_exeext +echo "$as_me:$LINENO: result: $ac_file" >&5 +echo "${ECHO_T}$ac_file" >&6 + +# Check the compiler produces executables we can run. If not, either +# the compiler is broken, or we cross compile. +echo "$as_me:$LINENO: checking whether the C compiler works" >&5 +echo $ECHO_N "checking whether the C compiler works... $ECHO_C" >&6 +# FIXME: These cross compiler hacks should be removed for Autoconf 3.0 +# If not cross compiling, check that we can run a simple program. +if test "$cross_compiling" != yes; then + if { ac_try='./$ac_file' + { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5 + (eval $ac_try) 2>&5 + ac_status=$? + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); }; }; then + cross_compiling=no + else + if test "$cross_compiling" = maybe; then + cross_compiling=yes + else + { { echo "$as_me:$LINENO: error: cannot run C compiled programs. +If you meant to cross compile, use \`--host'. +See \`config.log' for more details." >&5 +echo "$as_me: error: cannot run C compiled programs. +If you meant to cross compile, use \`--host'. +See \`config.log' for more details." >&2;} + { (exit 1); exit 1; }; } + fi + fi +fi +echo "$as_me:$LINENO: result: yes" >&5 +echo "${ECHO_T}yes" >&6 + +rm -f a.out a.exe conftest$ac_cv_exeext b.out +ac_clean_files=$ac_clean_files_save +# Check the compiler produces executables we can run. If not, either +# the compiler is broken, or we cross compile. +echo "$as_me:$LINENO: checking whether we are cross compiling" >&5 +echo $ECHO_N "checking whether we are cross compiling... $ECHO_C" >&6 +echo "$as_me:$LINENO: result: $cross_compiling" >&5 +echo "${ECHO_T}$cross_compiling" >&6 + +echo "$as_me:$LINENO: checking for suffix of executables" >&5 +echo $ECHO_N "checking for suffix of executables... $ECHO_C" >&6 +if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5 + (eval $ac_link) 2>&5 + ac_status=$? + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); }; then + # If both `conftest.exe' and `conftest' are `present' (well, observable) +# catch `conftest.exe'. For instance with Cygwin, `ls conftest' will +# work properly (i.e., refer to `conftest.exe'), while it won't with +# `rm'. +for ac_file in conftest.exe conftest conftest.*; do + test -f "$ac_file" || continue + case $ac_file in + *.$ac_ext | *.xcoff | *.tds | *.d | *.pdb | *.xSYM | *.bb | *.bbg | *.o | *.obj ) ;; + *.* ) ac_cv_exeext=`expr "$ac_file" : '[^.]*\(\..*\)'` + export ac_cv_exeext + break;; + * ) break;; + esac +done +else + { { echo "$as_me:$LINENO: error: cannot compute suffix of executables: cannot compile and link +See \`config.log' for more details." >&5 +echo "$as_me: error: cannot compute suffix of executables: cannot compile and link +See \`config.log' for more details." >&2;} + { (exit 1); exit 1; }; } +fi + +rm -f conftest$ac_cv_exeext +echo "$as_me:$LINENO: result: $ac_cv_exeext" >&5 +echo "${ECHO_T}$ac_cv_exeext" >&6 + +rm -f conftest.$ac_ext +EXEEXT=$ac_cv_exeext +ac_exeext=$EXEEXT +echo "$as_me:$LINENO: checking for suffix of object files" >&5 +echo $ECHO_N "checking for suffix of object files... $ECHO_C" >&6 +if test "${ac_cv_objext+set}" = set; then + echo $ECHO_N "(cached) $ECHO_C" >&6 +else + cat >conftest.$ac_ext <<_ACEOF +/* confdefs.h. */ +_ACEOF +cat confdefs.h >>conftest.$ac_ext +cat >>conftest.$ac_ext <<_ACEOF +/* end confdefs.h. */ + +int +main () +{ + + ; + return 0; +} +_ACEOF +rm -f conftest.o conftest.obj +if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5 + (eval $ac_compile) 2>&5 + ac_status=$? + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); }; then + for ac_file in `(ls conftest.o conftest.obj; ls conftest.*) 2>/dev/null`; do + case $ac_file in + *.$ac_ext | *.xcoff | *.tds | *.d | *.pdb | *.xSYM | *.bb | *.bbg ) ;; + *) ac_cv_objext=`expr "$ac_file" : '.*\.\(.*\)'` + break;; + esac +done +else + echo "$as_me: failed program was:" >&5 +sed 's/^/| /' conftest.$ac_ext >&5 + +{ { echo "$as_me:$LINENO: error: cannot compute suffix of object files: cannot compile +See \`config.log' for more details." >&5 +echo "$as_me: error: cannot compute suffix of object files: cannot compile +See \`config.log' for more details." >&2;} + { (exit 1); exit 1; }; } +fi + +rm -f conftest.$ac_cv_objext conftest.$ac_ext +fi +echo "$as_me:$LINENO: result: $ac_cv_objext" >&5 +echo "${ECHO_T}$ac_cv_objext" >&6 +OBJEXT=$ac_cv_objext +ac_objext=$OBJEXT +echo "$as_me:$LINENO: checking whether we are using the GNU C compiler" >&5 +echo $ECHO_N "checking whether we are using the GNU C compiler... $ECHO_C" >&6 +if test "${ac_cv_c_compiler_gnu+set}" = set; then + echo $ECHO_N "(cached) $ECHO_C" >&6 +else + cat >conftest.$ac_ext <<_ACEOF +/* confdefs.h. */ +_ACEOF +cat confdefs.h >>conftest.$ac_ext +cat >>conftest.$ac_ext <<_ACEOF +/* end confdefs.h. */ + +int +main () +{ +#ifndef __GNUC__ + choke me +#endif + + ; + return 0; +} +_ACEOF +rm -f conftest.$ac_objext +if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5 + (eval $ac_compile) 2>conftest.er1 + ac_status=$? + grep -v '^ *+' conftest.er1 >conftest.err + rm -f conftest.er1 + cat conftest.err >&5 + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); } && + { ac_try='test -z "$ac_c_werror_flag" || test ! -s conftest.err' + { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5 + (eval $ac_try) 2>&5 + ac_status=$? + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); }; } && + { ac_try='test -s conftest.$ac_objext' + { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5 + (eval $ac_try) 2>&5 + ac_status=$? + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); }; }; then + ac_compiler_gnu=yes +else + echo "$as_me: failed program was:" >&5 +sed 's/^/| /' conftest.$ac_ext >&5 + +ac_compiler_gnu=no +fi +rm -f conftest.err conftest.$ac_objext conftest.$ac_ext +ac_cv_c_compiler_gnu=$ac_compiler_gnu + +fi +echo "$as_me:$LINENO: result: $ac_cv_c_compiler_gnu" >&5 +echo "${ECHO_T}$ac_cv_c_compiler_gnu" >&6 +GCC=`test $ac_compiler_gnu = yes && echo yes` +ac_test_CFLAGS=${CFLAGS+set} +ac_save_CFLAGS=$CFLAGS +CFLAGS="-g" +echo "$as_me:$LINENO: checking whether $CC accepts -g" >&5 +echo $ECHO_N "checking whether $CC accepts -g... $ECHO_C" >&6 +if test "${ac_cv_prog_cc_g+set}" = set; then + echo $ECHO_N "(cached) $ECHO_C" >&6 +else + cat >conftest.$ac_ext <<_ACEOF +/* confdefs.h. */ +_ACEOF +cat confdefs.h >>conftest.$ac_ext +cat >>conftest.$ac_ext <<_ACEOF +/* end confdefs.h. */ + +int +main () +{ + + ; + return 0; +} +_ACEOF +rm -f conftest.$ac_objext +if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5 + (eval $ac_compile) 2>conftest.er1 + ac_status=$? + grep -v '^ *+' conftest.er1 >conftest.err + rm -f conftest.er1 + cat conftest.err >&5 + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); } && + { ac_try='test -z "$ac_c_werror_flag" || test ! -s conftest.err' + { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5 + (eval $ac_try) 2>&5 + ac_status=$? + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); }; } && + { ac_try='test -s conftest.$ac_objext' + { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5 + (eval $ac_try) 2>&5 + ac_status=$? + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); }; }; then + ac_cv_prog_cc_g=yes +else + echo "$as_me: failed program was:" >&5 +sed 's/^/| /' conftest.$ac_ext >&5 + +ac_cv_prog_cc_g=no +fi +rm -f conftest.err conftest.$ac_objext conftest.$ac_ext +fi +echo "$as_me:$LINENO: result: $ac_cv_prog_cc_g" >&5 +echo "${ECHO_T}$ac_cv_prog_cc_g" >&6 +if test "$ac_test_CFLAGS" = set; then + CFLAGS=$ac_save_CFLAGS +elif test $ac_cv_prog_cc_g = yes; then + if test "$GCC" = yes; then + CFLAGS="-g -O2" + else + CFLAGS="-g" + fi +else + if test "$GCC" = yes; then + CFLAGS="-O2" + else + CFLAGS= + fi +fi +echo "$as_me:$LINENO: checking for $CC option to accept ANSI C" >&5 +echo $ECHO_N "checking for $CC option to accept ANSI C... $ECHO_C" >&6 +if test "${ac_cv_prog_cc_stdc+set}" = set; then + echo $ECHO_N "(cached) $ECHO_C" >&6 +else + ac_cv_prog_cc_stdc=no +ac_save_CC=$CC +cat >conftest.$ac_ext <<_ACEOF +/* confdefs.h. */ +_ACEOF +cat confdefs.h >>conftest.$ac_ext +cat >>conftest.$ac_ext <<_ACEOF +/* end confdefs.h. */ +#include +#include +#include +#include +/* Most of the following tests are stolen from RCS 5.7's src/conf.sh. */ +struct buf { int x; }; +FILE * (*rcsopen) (struct buf *, struct stat *, int); +static char *e (p, i) + char **p; + int i; +{ + return p[i]; +} +static char *f (char * (*g) (char **, int), char **p, ...) +{ + char *s; + va_list v; + va_start (v,p); + s = g (p, va_arg (v,int)); + va_end (v); + return s; +} + +/* OSF 4.0 Compaq cc is some sort of almost-ANSI by default. It has + function prototypes and stuff, but not '\xHH' hex character constants. + These don't provoke an error unfortunately, instead are silently treated + as 'x'. The following induces an error, until -std1 is added to get + proper ANSI mode. Curiously '\x00'!='x' always comes out true, for an + array size at least. It's necessary to write '\x00'==0 to get something + that's true only with -std1. */ +int osf4_cc_array ['\x00' == 0 ? 1 : -1]; + +int test (int i, double x); +struct s1 {int (*f) (int a);}; +struct s2 {int (*f) (double a);}; +int pairnames (int, char **, FILE *(*)(struct buf *, struct stat *, int), int, int); +int argc; +char **argv; +int +main () +{ +return f (e, argv, 0) != argv[0] || f (e, argv, 1) != argv[1]; + ; + return 0; +} +_ACEOF +# Don't try gcc -ansi; that turns off useful extensions and +# breaks some systems' header files. +# AIX -qlanglvl=ansi +# Ultrix and OSF/1 -std1 +# HP-UX 10.20 and later -Ae +# HP-UX older versions -Aa -D_HPUX_SOURCE +# SVR4 -Xc -D__EXTENSIONS__ +for ac_arg in "" -qlanglvl=ansi -std1 -Ae "-Aa -D_HPUX_SOURCE" "-Xc -D__EXTENSIONS__" +do + CC="$ac_save_CC $ac_arg" + rm -f conftest.$ac_objext +if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5 + (eval $ac_compile) 2>conftest.er1 + ac_status=$? + grep -v '^ *+' conftest.er1 >conftest.err + rm -f conftest.er1 + cat conftest.err >&5 + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); } && + { ac_try='test -z "$ac_c_werror_flag" || test ! -s conftest.err' + { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5 + (eval $ac_try) 2>&5 + ac_status=$? + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); }; } && + { ac_try='test -s conftest.$ac_objext' + { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5 + (eval $ac_try) 2>&5 + ac_status=$? + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); }; }; then + ac_cv_prog_cc_stdc=$ac_arg +break +else + echo "$as_me: failed program was:" >&5 +sed 's/^/| /' conftest.$ac_ext >&5 + +fi +rm -f conftest.err conftest.$ac_objext +done +rm -f conftest.$ac_ext conftest.$ac_objext +CC=$ac_save_CC + +fi + +case "x$ac_cv_prog_cc_stdc" in + x|xno) + echo "$as_me:$LINENO: result: none needed" >&5 +echo "${ECHO_T}none needed" >&6 ;; + *) + echo "$as_me:$LINENO: result: $ac_cv_prog_cc_stdc" >&5 +echo "${ECHO_T}$ac_cv_prog_cc_stdc" >&6 + CC="$CC $ac_cv_prog_cc_stdc" ;; +esac + +# Some people use a C++ compiler to compile C. Since we use `exit', +# in C++ we need to declare it. In case someone uses the same compiler +# for both compiling C and C++ we need to have the C++ compiler decide +# the declaration of exit, since it's the most demanding environment. +cat >conftest.$ac_ext <<_ACEOF +#ifndef __cplusplus + choke me +#endif +_ACEOF +rm -f conftest.$ac_objext +if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5 + (eval $ac_compile) 2>conftest.er1 + ac_status=$? + grep -v '^ *+' conftest.er1 >conftest.err + rm -f conftest.er1 + cat conftest.err >&5 + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); } && + { ac_try='test -z "$ac_c_werror_flag" || test ! -s conftest.err' + { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5 + (eval $ac_try) 2>&5 + ac_status=$? + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); }; } && + { ac_try='test -s conftest.$ac_objext' + { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5 + (eval $ac_try) 2>&5 + ac_status=$? + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); }; }; then + for ac_declaration in \ + '' \ + 'extern "C" void std::exit (int) throw (); using std::exit;' \ + 'extern "C" void std::exit (int); using std::exit;' \ + 'extern "C" void exit (int) throw ();' \ + 'extern "C" void exit (int);' \ + 'void exit (int);' +do + cat >conftest.$ac_ext <<_ACEOF +/* confdefs.h. */ +_ACEOF +cat confdefs.h >>conftest.$ac_ext +cat >>conftest.$ac_ext <<_ACEOF +/* end confdefs.h. */ +$ac_declaration +#include +int +main () +{ +exit (42); + ; + return 0; +} +_ACEOF +rm -f conftest.$ac_objext +if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5 + (eval $ac_compile) 2>conftest.er1 + ac_status=$? + grep -v '^ *+' conftest.er1 >conftest.err + rm -f conftest.er1 + cat conftest.err >&5 + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); } && + { ac_try='test -z "$ac_c_werror_flag" || test ! -s conftest.err' + { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5 + (eval $ac_try) 2>&5 + ac_status=$? + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); }; } && + { ac_try='test -s conftest.$ac_objext' + { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5 + (eval $ac_try) 2>&5 + ac_status=$? + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); }; }; then + : +else + echo "$as_me: failed program was:" >&5 +sed 's/^/| /' conftest.$ac_ext >&5 + +continue +fi +rm -f conftest.err conftest.$ac_objext conftest.$ac_ext + cat >conftest.$ac_ext <<_ACEOF +/* confdefs.h. */ +_ACEOF +cat confdefs.h >>conftest.$ac_ext +cat >>conftest.$ac_ext <<_ACEOF +/* end confdefs.h. */ +$ac_declaration +int +main () +{ +exit (42); + ; + return 0; +} +_ACEOF +rm -f conftest.$ac_objext +if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5 + (eval $ac_compile) 2>conftest.er1 + ac_status=$? + grep -v '^ *+' conftest.er1 >conftest.err + rm -f conftest.er1 + cat conftest.err >&5 + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); } && + { ac_try='test -z "$ac_c_werror_flag" || test ! -s conftest.err' + { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5 + (eval $ac_try) 2>&5 + ac_status=$? + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); }; } && + { ac_try='test -s conftest.$ac_objext' + { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5 + (eval $ac_try) 2>&5 + ac_status=$? + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); }; }; then + break +else + echo "$as_me: failed program was:" >&5 +sed 's/^/| /' conftest.$ac_ext >&5 + +fi +rm -f conftest.err conftest.$ac_objext conftest.$ac_ext +done +rm -f conftest* +if test -n "$ac_declaration"; then + echo '#ifdef __cplusplus' >>confdefs.h + echo $ac_declaration >>confdefs.h + echo '#endif' >>confdefs.h +fi + +else + echo "$as_me: failed program was:" >&5 +sed 's/^/| /' conftest.$ac_ext >&5 + +fi +rm -f conftest.err conftest.$ac_objext conftest.$ac_ext +ac_ext=c +ac_cpp='$CPP $CPPFLAGS' +ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5' +ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5' +ac_compiler_gnu=$ac_cv_c_compiler_gnu + +if test -n "$ac_tool_prefix"; then + # Extract the first word of "${ac_tool_prefix}ar", so it can be a program name with args. +set dummy ${ac_tool_prefix}ar; ac_word=$2 +echo "$as_me:$LINENO: checking for $ac_word" >&5 +echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6 +if test "${ac_cv_prog_AR+set}" = set; then + echo $ECHO_N "(cached) $ECHO_C" >&6 +else + if test -n "$AR"; then + ac_cv_prog_AR="$AR" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + ac_cv_prog_AR="${ac_tool_prefix}ar" + echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done +done + +fi +fi +AR=$ac_cv_prog_AR +if test -n "$AR"; then + echo "$as_me:$LINENO: result: $AR" >&5 +echo "${ECHO_T}$AR" >&6 +else + echo "$as_me:$LINENO: result: no" >&5 +echo "${ECHO_T}no" >&6 +fi + +fi +if test -z "$ac_cv_prog_AR"; then + ac_ct_AR=$AR + # Extract the first word of "ar", so it can be a program name with args. +set dummy ar; ac_word=$2 +echo "$as_me:$LINENO: checking for $ac_word" >&5 +echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6 +if test "${ac_cv_prog_ac_ct_AR+set}" = set; then + echo $ECHO_N "(cached) $ECHO_C" >&6 +else + if test -n "$ac_ct_AR"; then + ac_cv_prog_ac_ct_AR="$ac_ct_AR" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + ac_cv_prog_ac_ct_AR="ar" + echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done +done + +fi +fi +ac_ct_AR=$ac_cv_prog_ac_ct_AR +if test -n "$ac_ct_AR"; then + echo "$as_me:$LINENO: result: $ac_ct_AR" >&5 +echo "${ECHO_T}$ac_ct_AR" >&6 +else + echo "$as_me:$LINENO: result: no" >&5 +echo "${ECHO_T}no" >&6 +fi + + AR=$ac_ct_AR +else + AR="$ac_cv_prog_AR" +fi + +if test -n "$ac_tool_prefix"; then + # Extract the first word of "${ac_tool_prefix}ranlib", so it can be a program name with args. +set dummy ${ac_tool_prefix}ranlib; ac_word=$2 +echo "$as_me:$LINENO: checking for $ac_word" >&5 +echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6 +if test "${ac_cv_prog_RANLIB+set}" = set; then + echo $ECHO_N "(cached) $ECHO_C" >&6 +else + if test -n "$RANLIB"; then + ac_cv_prog_RANLIB="$RANLIB" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + ac_cv_prog_RANLIB="${ac_tool_prefix}ranlib" + echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done +done + +fi +fi +RANLIB=$ac_cv_prog_RANLIB +if test -n "$RANLIB"; then + echo "$as_me:$LINENO: result: $RANLIB" >&5 +echo "${ECHO_T}$RANLIB" >&6 +else + echo "$as_me:$LINENO: result: no" >&5 +echo "${ECHO_T}no" >&6 +fi + +fi +if test -z "$ac_cv_prog_RANLIB"; then + ac_ct_RANLIB=$RANLIB + # Extract the first word of "ranlib", so it can be a program name with args. +set dummy ranlib; ac_word=$2 +echo "$as_me:$LINENO: checking for $ac_word" >&5 +echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6 +if test "${ac_cv_prog_ac_ct_RANLIB+set}" = set; then + echo $ECHO_N "(cached) $ECHO_C" >&6 +else + if test -n "$ac_ct_RANLIB"; then + ac_cv_prog_ac_ct_RANLIB="$ac_ct_RANLIB" # Let the user override the test. +else +as_save_IFS=$IFS; IFS=$PATH_SEPARATOR +for as_dir in $PATH +do + IFS=$as_save_IFS + test -z "$as_dir" && as_dir=. + for ac_exec_ext in '' $ac_executable_extensions; do + if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then + ac_cv_prog_ac_ct_RANLIB="ranlib" + echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5 + break 2 + fi +done +done + + test -z "$ac_cv_prog_ac_ct_RANLIB" && ac_cv_prog_ac_ct_RANLIB=":" +fi +fi +ac_ct_RANLIB=$ac_cv_prog_ac_ct_RANLIB +if test -n "$ac_ct_RANLIB"; then + echo "$as_me:$LINENO: result: $ac_ct_RANLIB" >&5 +echo "${ECHO_T}$ac_ct_RANLIB" >&6 +else + echo "$as_me:$LINENO: result: no" >&5 +echo "${ECHO_T}no" >&6 +fi + + RANLIB=$ac_ct_RANLIB +else + RANLIB="$ac_cv_prog_RANLIB" +fi + + + +ac_ext=c +ac_cpp='$CPP $CPPFLAGS' +ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5' +ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5' +ac_compiler_gnu=$ac_cv_c_compiler_gnu +echo "$as_me:$LINENO: checking how to run the C preprocessor" >&5 +echo $ECHO_N "checking how to run the C preprocessor... $ECHO_C" >&6 +# On Suns, sometimes $CPP names a directory. +if test -n "$CPP" && test -d "$CPP"; then + CPP= +fi +if test -z "$CPP"; then + if test "${ac_cv_prog_CPP+set}" = set; then + echo $ECHO_N "(cached) $ECHO_C" >&6 +else + # Double quotes because CPP needs to be expanded + for CPP in "$CC -E" "$CC -E -traditional-cpp" "/lib/cpp" + do + ac_preproc_ok=false +for ac_c_preproc_warn_flag in '' yes +do + # Use a header file that comes with gcc, so configuring glibc + # with a fresh cross-compiler works. + # Prefer to if __STDC__ is defined, since + # exists even on freestanding compilers. + # On the NeXT, cc -E runs the code through the compiler's parser, + # not just through cpp. "Syntax error" is here to catch this case. + cat >conftest.$ac_ext <<_ACEOF +/* confdefs.h. */ +_ACEOF +cat confdefs.h >>conftest.$ac_ext +cat >>conftest.$ac_ext <<_ACEOF +/* end confdefs.h. */ +#ifdef __STDC__ +# include +#else +# include +#endif + Syntax error +_ACEOF +if { (eval echo "$as_me:$LINENO: \"$ac_cpp conftest.$ac_ext\"") >&5 + (eval $ac_cpp conftest.$ac_ext) 2>conftest.er1 + ac_status=$? + grep -v '^ *+' conftest.er1 >conftest.err + rm -f conftest.er1 + cat conftest.err >&5 + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); } >/dev/null; then + if test -s conftest.err; then + ac_cpp_err=$ac_c_preproc_warn_flag + ac_cpp_err=$ac_cpp_err$ac_c_werror_flag + else + ac_cpp_err= + fi +else + ac_cpp_err=yes +fi +if test -z "$ac_cpp_err"; then + : +else + echo "$as_me: failed program was:" >&5 +sed 's/^/| /' conftest.$ac_ext >&5 + + # Broken: fails on valid input. +continue +fi +rm -f conftest.err conftest.$ac_ext + + # OK, works on sane cases. Now check whether non-existent headers + # can be detected and how. + cat >conftest.$ac_ext <<_ACEOF +/* confdefs.h. */ +_ACEOF +cat confdefs.h >>conftest.$ac_ext +cat >>conftest.$ac_ext <<_ACEOF +/* end confdefs.h. */ +#include +_ACEOF +if { (eval echo "$as_me:$LINENO: \"$ac_cpp conftest.$ac_ext\"") >&5 + (eval $ac_cpp conftest.$ac_ext) 2>conftest.er1 + ac_status=$? + grep -v '^ *+' conftest.er1 >conftest.err + rm -f conftest.er1 + cat conftest.err >&5 + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); } >/dev/null; then + if test -s conftest.err; then + ac_cpp_err=$ac_c_preproc_warn_flag + ac_cpp_err=$ac_cpp_err$ac_c_werror_flag + else + ac_cpp_err= + fi +else + ac_cpp_err=yes +fi +if test -z "$ac_cpp_err"; then + # Broken: success on invalid input. +continue +else + echo "$as_me: failed program was:" >&5 +sed 's/^/| /' conftest.$ac_ext >&5 + + # Passes both tests. +ac_preproc_ok=: +break +fi +rm -f conftest.err conftest.$ac_ext + +done +# Because of `break', _AC_PREPROC_IFELSE's cleaning code was skipped. +rm -f conftest.err conftest.$ac_ext +if $ac_preproc_ok; then + break +fi + + done + ac_cv_prog_CPP=$CPP + +fi + CPP=$ac_cv_prog_CPP +else + ac_cv_prog_CPP=$CPP +fi +echo "$as_me:$LINENO: result: $CPP" >&5 +echo "${ECHO_T}$CPP" >&6 +ac_preproc_ok=false +for ac_c_preproc_warn_flag in '' yes +do + # Use a header file that comes with gcc, so configuring glibc + # with a fresh cross-compiler works. + # Prefer to if __STDC__ is defined, since + # exists even on freestanding compilers. + # On the NeXT, cc -E runs the code through the compiler's parser, + # not just through cpp. "Syntax error" is here to catch this case. + cat >conftest.$ac_ext <<_ACEOF +/* confdefs.h. */ +_ACEOF +cat confdefs.h >>conftest.$ac_ext +cat >>conftest.$ac_ext <<_ACEOF +/* end confdefs.h. */ +#ifdef __STDC__ +# include +#else +# include +#endif + Syntax error +_ACEOF +if { (eval echo "$as_me:$LINENO: \"$ac_cpp conftest.$ac_ext\"") >&5 + (eval $ac_cpp conftest.$ac_ext) 2>conftest.er1 + ac_status=$? + grep -v '^ *+' conftest.er1 >conftest.err + rm -f conftest.er1 + cat conftest.err >&5 + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); } >/dev/null; then + if test -s conftest.err; then + ac_cpp_err=$ac_c_preproc_warn_flag + ac_cpp_err=$ac_cpp_err$ac_c_werror_flag + else + ac_cpp_err= + fi +else + ac_cpp_err=yes +fi +if test -z "$ac_cpp_err"; then + : +else + echo "$as_me: failed program was:" >&5 +sed 's/^/| /' conftest.$ac_ext >&5 + + # Broken: fails on valid input. +continue +fi +rm -f conftest.err conftest.$ac_ext + + # OK, works on sane cases. Now check whether non-existent headers + # can be detected and how. + cat >conftest.$ac_ext <<_ACEOF +/* confdefs.h. */ +_ACEOF +cat confdefs.h >>conftest.$ac_ext +cat >>conftest.$ac_ext <<_ACEOF +/* end confdefs.h. */ +#include +_ACEOF +if { (eval echo "$as_me:$LINENO: \"$ac_cpp conftest.$ac_ext\"") >&5 + (eval $ac_cpp conftest.$ac_ext) 2>conftest.er1 + ac_status=$? + grep -v '^ *+' conftest.er1 >conftest.err + rm -f conftest.er1 + cat conftest.err >&5 + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); } >/dev/null; then + if test -s conftest.err; then + ac_cpp_err=$ac_c_preproc_warn_flag + ac_cpp_err=$ac_cpp_err$ac_c_werror_flag + else + ac_cpp_err= + fi +else + ac_cpp_err=yes +fi +if test -z "$ac_cpp_err"; then + # Broken: success on invalid input. +continue +else + echo "$as_me: failed program was:" >&5 +sed 's/^/| /' conftest.$ac_ext >&5 + + # Passes both tests. +ac_preproc_ok=: +break +fi +rm -f conftest.err conftest.$ac_ext + +done +# Because of `break', _AC_PREPROC_IFELSE's cleaning code was skipped. +rm -f conftest.err conftest.$ac_ext +if $ac_preproc_ok; then + : +else + { { echo "$as_me:$LINENO: error: C preprocessor \"$CPP\" fails sanity check +See \`config.log' for more details." >&5 +echo "$as_me: error: C preprocessor \"$CPP\" fails sanity check +See \`config.log' for more details." >&2;} + { (exit 1); exit 1; }; } +fi + +ac_ext=c +ac_cpp='$CPP $CPPFLAGS' +ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5' +ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5' +ac_compiler_gnu=$ac_cv_c_compiler_gnu + + +echo "$as_me:$LINENO: checking for egrep" >&5 +echo $ECHO_N "checking for egrep... $ECHO_C" >&6 +if test "${ac_cv_prog_egrep+set}" = set; then + echo $ECHO_N "(cached) $ECHO_C" >&6 +else + if echo a | (grep -E '(a|b)') >/dev/null 2>&1 + then ac_cv_prog_egrep='grep -E' + else ac_cv_prog_egrep='egrep' + fi +fi +echo "$as_me:$LINENO: result: $ac_cv_prog_egrep" >&5 +echo "${ECHO_T}$ac_cv_prog_egrep" >&6 + EGREP=$ac_cv_prog_egrep + + +echo "$as_me:$LINENO: checking for ANSI C header files" >&5 +echo $ECHO_N "checking for ANSI C header files... $ECHO_C" >&6 +if test "${ac_cv_header_stdc+set}" = set; then + echo $ECHO_N "(cached) $ECHO_C" >&6 +else + cat >conftest.$ac_ext <<_ACEOF +/* confdefs.h. */ +_ACEOF +cat confdefs.h >>conftest.$ac_ext +cat >>conftest.$ac_ext <<_ACEOF +/* end confdefs.h. */ +#include +#include +#include +#include + +int +main () +{ + + ; + return 0; +} +_ACEOF +rm -f conftest.$ac_objext +if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5 + (eval $ac_compile) 2>conftest.er1 + ac_status=$? + grep -v '^ *+' conftest.er1 >conftest.err + rm -f conftest.er1 + cat conftest.err >&5 + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); } && + { ac_try='test -z "$ac_c_werror_flag" || test ! -s conftest.err' + { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5 + (eval $ac_try) 2>&5 + ac_status=$? + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); }; } && + { ac_try='test -s conftest.$ac_objext' + { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5 + (eval $ac_try) 2>&5 + ac_status=$? + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); }; }; then + ac_cv_header_stdc=yes +else + echo "$as_me: failed program was:" >&5 +sed 's/^/| /' conftest.$ac_ext >&5 + +ac_cv_header_stdc=no +fi +rm -f conftest.err conftest.$ac_objext conftest.$ac_ext + +if test $ac_cv_header_stdc = yes; then + # SunOS 4.x string.h does not declare mem*, contrary to ANSI. + cat >conftest.$ac_ext <<_ACEOF +/* confdefs.h. */ +_ACEOF +cat confdefs.h >>conftest.$ac_ext +cat >>conftest.$ac_ext <<_ACEOF +/* end confdefs.h. */ +#include + +_ACEOF +if (eval "$ac_cpp conftest.$ac_ext") 2>&5 | + $EGREP "memchr" >/dev/null 2>&1; then + : +else + ac_cv_header_stdc=no +fi +rm -f conftest* + +fi + +if test $ac_cv_header_stdc = yes; then + # ISC 2.0.2 stdlib.h does not declare free, contrary to ANSI. + cat >conftest.$ac_ext <<_ACEOF +/* confdefs.h. */ +_ACEOF +cat confdefs.h >>conftest.$ac_ext +cat >>conftest.$ac_ext <<_ACEOF +/* end confdefs.h. */ +#include + +_ACEOF +if (eval "$ac_cpp conftest.$ac_ext") 2>&5 | + $EGREP "free" >/dev/null 2>&1; then + : +else + ac_cv_header_stdc=no +fi +rm -f conftest* + +fi + +if test $ac_cv_header_stdc = yes; then + # /bin/cc in Irix-4.0.5 gets non-ANSI ctype macros unless using -ansi. + if test "$cross_compiling" = yes; then + : +else + cat >conftest.$ac_ext <<_ACEOF +/* confdefs.h. */ +_ACEOF +cat confdefs.h >>conftest.$ac_ext +cat >>conftest.$ac_ext <<_ACEOF +/* end confdefs.h. */ +#include +#if ((' ' & 0x0FF) == 0x020) +# define ISLOWER(c) ('a' <= (c) && (c) <= 'z') +# define TOUPPER(c) (ISLOWER(c) ? 'A' + ((c) - 'a') : (c)) +#else +# define ISLOWER(c) \ + (('a' <= (c) && (c) <= 'i') \ + || ('j' <= (c) && (c) <= 'r') \ + || ('s' <= (c) && (c) <= 'z')) +# define TOUPPER(c) (ISLOWER(c) ? ((c) | 0x40) : (c)) +#endif + +#define XOR(e, f) (((e) && !(f)) || (!(e) && (f))) +int +main () +{ + int i; + for (i = 0; i < 256; i++) + if (XOR (islower (i), ISLOWER (i)) + || toupper (i) != TOUPPER (i)) + exit(2); + exit (0); +} +_ACEOF +rm -f conftest$ac_exeext +if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5 + (eval $ac_link) 2>&5 + ac_status=$? + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); } && { ac_try='./conftest$ac_exeext' + { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5 + (eval $ac_try) 2>&5 + ac_status=$? + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); }; }; then + : +else + echo "$as_me: program exited with status $ac_status" >&5 +echo "$as_me: failed program was:" >&5 +sed 's/^/| /' conftest.$ac_ext >&5 + +( exit $ac_status ) +ac_cv_header_stdc=no +fi +rm -f core *.core gmon.out bb.out conftest$ac_exeext conftest.$ac_objext conftest.$ac_ext +fi +fi +fi +echo "$as_me:$LINENO: result: $ac_cv_header_stdc" >&5 +echo "${ECHO_T}$ac_cv_header_stdc" >&6 +if test $ac_cv_header_stdc = yes; then + +cat >>confdefs.h <<\_ACEOF +#define STDC_HEADERS 1 +_ACEOF + +fi + +# On IRIX 5.3, sys/types and inttypes.h are conflicting. + + + + + + + + + +for ac_header in sys/types.h sys/stat.h stdlib.h string.h memory.h strings.h \ + inttypes.h stdint.h unistd.h +do +as_ac_Header=`echo "ac_cv_header_$ac_header" | $as_tr_sh` +echo "$as_me:$LINENO: checking for $ac_header" >&5 +echo $ECHO_N "checking for $ac_header... $ECHO_C" >&6 +if eval "test \"\${$as_ac_Header+set}\" = set"; then + echo $ECHO_N "(cached) $ECHO_C" >&6 +else + cat >conftest.$ac_ext <<_ACEOF +/* confdefs.h. */ +_ACEOF +cat confdefs.h >>conftest.$ac_ext +cat >>conftest.$ac_ext <<_ACEOF +/* end confdefs.h. */ +$ac_includes_default + +#include <$ac_header> +_ACEOF +rm -f conftest.$ac_objext +if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5 + (eval $ac_compile) 2>conftest.er1 + ac_status=$? + grep -v '^ *+' conftest.er1 >conftest.err + rm -f conftest.er1 + cat conftest.err >&5 + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); } && + { ac_try='test -z "$ac_c_werror_flag" || test ! -s conftest.err' + { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5 + (eval $ac_try) 2>&5 + ac_status=$? + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); }; } && + { ac_try='test -s conftest.$ac_objext' + { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5 + (eval $ac_try) 2>&5 + ac_status=$? + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); }; }; then + eval "$as_ac_Header=yes" +else + echo "$as_me: failed program was:" >&5 +sed 's/^/| /' conftest.$ac_ext >&5 + +eval "$as_ac_Header=no" +fi +rm -f conftest.err conftest.$ac_objext conftest.$ac_ext +fi +echo "$as_me:$LINENO: result: `eval echo '${'$as_ac_Header'}'`" >&5 +echo "${ECHO_T}`eval echo '${'$as_ac_Header'}'`" >&6 +if test `eval echo '${'$as_ac_Header'}'` = yes; then + cat >>confdefs.h <<_ACEOF +#define `echo "HAVE_$ac_header" | $as_tr_cpp` 1 +_ACEOF + +fi + +done + + + + +for ac_header in stdlib.h unistd.h +do +as_ac_Header=`echo "ac_cv_header_$ac_header" | $as_tr_sh` +if eval "test \"\${$as_ac_Header+set}\" = set"; then + echo "$as_me:$LINENO: checking for $ac_header" >&5 +echo $ECHO_N "checking for $ac_header... $ECHO_C" >&6 +if eval "test \"\${$as_ac_Header+set}\" = set"; then + echo $ECHO_N "(cached) $ECHO_C" >&6 +fi +echo "$as_me:$LINENO: result: `eval echo '${'$as_ac_Header'}'`" >&5 +echo "${ECHO_T}`eval echo '${'$as_ac_Header'}'`" >&6 +else + # Is the header compilable? +echo "$as_me:$LINENO: checking $ac_header usability" >&5 +echo $ECHO_N "checking $ac_header usability... $ECHO_C" >&6 +cat >conftest.$ac_ext <<_ACEOF +/* confdefs.h. */ +_ACEOF +cat confdefs.h >>conftest.$ac_ext +cat >>conftest.$ac_ext <<_ACEOF +/* end confdefs.h. */ +$ac_includes_default +#include <$ac_header> +_ACEOF +rm -f conftest.$ac_objext +if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5 + (eval $ac_compile) 2>conftest.er1 + ac_status=$? + grep -v '^ *+' conftest.er1 >conftest.err + rm -f conftest.er1 + cat conftest.err >&5 + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); } && + { ac_try='test -z "$ac_c_werror_flag" || test ! -s conftest.err' + { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5 + (eval $ac_try) 2>&5 + ac_status=$? + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); }; } && + { ac_try='test -s conftest.$ac_objext' + { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5 + (eval $ac_try) 2>&5 + ac_status=$? + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); }; }; then + ac_header_compiler=yes +else + echo "$as_me: failed program was:" >&5 +sed 's/^/| /' conftest.$ac_ext >&5 + +ac_header_compiler=no +fi +rm -f conftest.err conftest.$ac_objext conftest.$ac_ext +echo "$as_me:$LINENO: result: $ac_header_compiler" >&5 +echo "${ECHO_T}$ac_header_compiler" >&6 + +# Is the header present? +echo "$as_me:$LINENO: checking $ac_header presence" >&5 +echo $ECHO_N "checking $ac_header presence... $ECHO_C" >&6 +cat >conftest.$ac_ext <<_ACEOF +/* confdefs.h. */ +_ACEOF +cat confdefs.h >>conftest.$ac_ext +cat >>conftest.$ac_ext <<_ACEOF +/* end confdefs.h. */ +#include <$ac_header> +_ACEOF +if { (eval echo "$as_me:$LINENO: \"$ac_cpp conftest.$ac_ext\"") >&5 + (eval $ac_cpp conftest.$ac_ext) 2>conftest.er1 + ac_status=$? + grep -v '^ *+' conftest.er1 >conftest.err + rm -f conftest.er1 + cat conftest.err >&5 + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); } >/dev/null; then + if test -s conftest.err; then + ac_cpp_err=$ac_c_preproc_warn_flag + ac_cpp_err=$ac_cpp_err$ac_c_werror_flag + else + ac_cpp_err= + fi +else + ac_cpp_err=yes +fi +if test -z "$ac_cpp_err"; then + ac_header_preproc=yes +else + echo "$as_me: failed program was:" >&5 +sed 's/^/| /' conftest.$ac_ext >&5 + + ac_header_preproc=no +fi +rm -f conftest.err conftest.$ac_ext +echo "$as_me:$LINENO: result: $ac_header_preproc" >&5 +echo "${ECHO_T}$ac_header_preproc" >&6 + +# So? What about this header? +case $ac_header_compiler:$ac_header_preproc:$ac_c_preproc_warn_flag in + yes:no: ) + { echo "$as_me:$LINENO: WARNING: $ac_header: accepted by the compiler, rejected by the preprocessor!" >&5 +echo "$as_me: WARNING: $ac_header: accepted by the compiler, rejected by the preprocessor!" >&2;} + { echo "$as_me:$LINENO: WARNING: $ac_header: proceeding with the compiler's result" >&5 +echo "$as_me: WARNING: $ac_header: proceeding with the compiler's result" >&2;} + ac_header_preproc=yes + ;; + no:yes:* ) + { echo "$as_me:$LINENO: WARNING: $ac_header: present but cannot be compiled" >&5 +echo "$as_me: WARNING: $ac_header: present but cannot be compiled" >&2;} + { echo "$as_me:$LINENO: WARNING: $ac_header: check for missing prerequisite headers?" >&5 +echo "$as_me: WARNING: $ac_header: check for missing prerequisite headers?" >&2;} + { echo "$as_me:$LINENO: WARNING: $ac_header: see the Autoconf documentation" >&5 +echo "$as_me: WARNING: $ac_header: see the Autoconf documentation" >&2;} + { echo "$as_me:$LINENO: WARNING: $ac_header: section \"Present But Cannot Be Compiled\"" >&5 +echo "$as_me: WARNING: $ac_header: section \"Present But Cannot Be Compiled\"" >&2;} + { echo "$as_me:$LINENO: WARNING: $ac_header: proceeding with the preprocessor's result" >&5 +echo "$as_me: WARNING: $ac_header: proceeding with the preprocessor's result" >&2;} + { echo "$as_me:$LINENO: WARNING: $ac_header: in the future, the compiler will take precedence" >&5 +echo "$as_me: WARNING: $ac_header: in the future, the compiler will take precedence" >&2;} + ( + cat <<\_ASBOX +## ------------------------------------------ ## +## Report this to the AC_PACKAGE_NAME lists. ## +## ------------------------------------------ ## +_ASBOX + ) | + sed "s/^/$as_me: WARNING: /" >&2 + ;; +esac +echo "$as_me:$LINENO: checking for $ac_header" >&5 +echo $ECHO_N "checking for $ac_header... $ECHO_C" >&6 +if eval "test \"\${$as_ac_Header+set}\" = set"; then + echo $ECHO_N "(cached) $ECHO_C" >&6 +else + eval "$as_ac_Header=\$ac_header_preproc" +fi +echo "$as_me:$LINENO: result: `eval echo '${'$as_ac_Header'}'`" >&5 +echo "${ECHO_T}`eval echo '${'$as_ac_Header'}'`" >&6 + +fi +if test `eval echo '${'$as_ac_Header'}'` = yes; then + cat >>confdefs.h <<_ACEOF +#define `echo "HAVE_$ac_header" | $as_tr_cpp` 1 +_ACEOF + +fi + +done + + +for ac_func in getpagesize +do +as_ac_var=`echo "ac_cv_func_$ac_func" | $as_tr_sh` +echo "$as_me:$LINENO: checking for $ac_func" >&5 +echo $ECHO_N "checking for $ac_func... $ECHO_C" >&6 +if eval "test \"\${$as_ac_var+set}\" = set"; then + echo $ECHO_N "(cached) $ECHO_C" >&6 +else + cat >conftest.$ac_ext <<_ACEOF +/* confdefs.h. */ +_ACEOF +cat confdefs.h >>conftest.$ac_ext +cat >>conftest.$ac_ext <<_ACEOF +/* end confdefs.h. */ +/* Define $ac_func to an innocuous variant, in case declares $ac_func. + For example, HP-UX 11i declares gettimeofday. */ +#define $ac_func innocuous_$ac_func + +/* System header to define __stub macros and hopefully few prototypes, + which can conflict with char $ac_func (); below. + Prefer to if __STDC__ is defined, since + exists even on freestanding compilers. */ + +#ifdef __STDC__ +# include +#else +# include +#endif + +#undef $ac_func + +/* Override any gcc2 internal prototype to avoid an error. */ +#ifdef __cplusplus +extern "C" +{ +#endif +/* We use char because int might match the return type of a gcc2 + builtin and then its argument prototype would still apply. */ +char $ac_func (); +/* The GNU C library defines this for functions which it implements + to always fail with ENOSYS. Some functions are actually named + something starting with __ and the normal name is an alias. */ +#if defined (__stub_$ac_func) || defined (__stub___$ac_func) +choke me +#else +char (*f) () = $ac_func; +#endif +#ifdef __cplusplus +} +#endif + +int +main () +{ +return f != $ac_func; + ; + return 0; +} +_ACEOF +rm -f conftest.$ac_objext conftest$ac_exeext +if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5 + (eval $ac_link) 2>conftest.er1 + ac_status=$? + grep -v '^ *+' conftest.er1 >conftest.err + rm -f conftest.er1 + cat conftest.err >&5 + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); } && + { ac_try='test -z "$ac_c_werror_flag" || test ! -s conftest.err' + { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5 + (eval $ac_try) 2>&5 + ac_status=$? + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); }; } && + { ac_try='test -s conftest$ac_exeext' + { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5 + (eval $ac_try) 2>&5 + ac_status=$? + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); }; }; then + eval "$as_ac_var=yes" +else + echo "$as_me: failed program was:" >&5 +sed 's/^/| /' conftest.$ac_ext >&5 + +eval "$as_ac_var=no" +fi +rm -f conftest.err conftest.$ac_objext \ + conftest$ac_exeext conftest.$ac_ext +fi +echo "$as_me:$LINENO: result: `eval echo '${'$as_ac_var'}'`" >&5 +echo "${ECHO_T}`eval echo '${'$as_ac_var'}'`" >&6 +if test `eval echo '${'$as_ac_var'}'` = yes; then + cat >>confdefs.h <<_ACEOF +#define `echo "HAVE_$ac_func" | $as_tr_cpp` 1 +_ACEOF + +fi +done + +echo "$as_me:$LINENO: checking for working mmap" >&5 +echo $ECHO_N "checking for working mmap... $ECHO_C" >&6 +if test "${ac_cv_func_mmap_fixed_mapped+set}" = set; then + echo $ECHO_N "(cached) $ECHO_C" >&6 +else + if test "$cross_compiling" = yes; then + ac_cv_func_mmap_fixed_mapped=no +else + cat >conftest.$ac_ext <<_ACEOF +/* confdefs.h. */ +_ACEOF +cat confdefs.h >>conftest.$ac_ext +cat >>conftest.$ac_ext <<_ACEOF +/* end confdefs.h. */ +$ac_includes_default +/* malloc might have been renamed as rpl_malloc. */ +#undef malloc + +/* Thanks to Mike Haertel and Jim Avera for this test. + Here is a matrix of mmap possibilities: + mmap private not fixed + mmap private fixed at somewhere currently unmapped + mmap private fixed at somewhere already mapped + mmap shared not fixed + mmap shared fixed at somewhere currently unmapped + mmap shared fixed at somewhere already mapped + For private mappings, we should verify that changes cannot be read() + back from the file, nor mmap's back from the file at a different + address. (There have been systems where private was not correctly + implemented like the infamous i386 svr4.0, and systems where the + VM page cache was not coherent with the file system buffer cache + like early versions of FreeBSD and possibly contemporary NetBSD.) + For shared mappings, we should conversely verify that changes get + propagated back to all the places they're supposed to be. + + Grep wants private fixed already mapped. + The main things grep needs to know about mmap are: + * does it exist and is it safe to write into the mmap'd area + * how to use it (BSD variants) */ + +#include +#include + +#if !STDC_HEADERS && !HAVE_STDLIB_H +char *malloc (); +#endif + +/* This mess was copied from the GNU getpagesize.h. */ +#if !HAVE_GETPAGESIZE +/* Assume that all systems that can run configure have sys/param.h. */ +# if !HAVE_SYS_PARAM_H +# define HAVE_SYS_PARAM_H 1 +# endif + +# ifdef _SC_PAGESIZE +# define getpagesize() sysconf(_SC_PAGESIZE) +# else /* no _SC_PAGESIZE */ +# if HAVE_SYS_PARAM_H +# include +# ifdef EXEC_PAGESIZE +# define getpagesize() EXEC_PAGESIZE +# else /* no EXEC_PAGESIZE */ +# ifdef NBPG +# define getpagesize() NBPG * CLSIZE +# ifndef CLSIZE +# define CLSIZE 1 +# endif /* no CLSIZE */ +# else /* no NBPG */ +# ifdef NBPC +# define getpagesize() NBPC +# else /* no NBPC */ +# ifdef PAGESIZE +# define getpagesize() PAGESIZE +# endif /* PAGESIZE */ +# endif /* no NBPC */ +# endif /* no NBPG */ +# endif /* no EXEC_PAGESIZE */ +# else /* no HAVE_SYS_PARAM_H */ +# define getpagesize() 8192 /* punt totally */ +# endif /* no HAVE_SYS_PARAM_H */ +# endif /* no _SC_PAGESIZE */ + +#endif /* no HAVE_GETPAGESIZE */ + +int +main () +{ + char *data, *data2, *data3; + int i, pagesize; + int fd; + + pagesize = getpagesize (); + + /* First, make a file with some known garbage in it. */ + data = (char *) malloc (pagesize); + if (!data) + exit (1); + for (i = 0; i < pagesize; ++i) + *(data + i) = rand (); + umask (0); + fd = creat ("conftest.mmap", 0600); + if (fd < 0) + exit (1); + if (write (fd, data, pagesize) != pagesize) + exit (1); + close (fd); + + /* Next, try to mmap the file at a fixed address which already has + something else allocated at it. If we can, also make sure that + we see the same garbage. */ + fd = open ("conftest.mmap", O_RDWR); + if (fd < 0) + exit (1); + data2 = (char *) malloc (2 * pagesize); + if (!data2) + exit (1); + data2 += (pagesize - ((long) data2 & (pagesize - 1))) & (pagesize - 1); + if (data2 != mmap (data2, pagesize, PROT_READ | PROT_WRITE, + MAP_PRIVATE | MAP_FIXED, fd, 0L)) + exit (1); + for (i = 0; i < pagesize; ++i) + if (*(data + i) != *(data2 + i)) + exit (1); + + /* Finally, make sure that changes to the mapped area do not + percolate back to the file as seen by read(). (This is a bug on + some variants of i386 svr4.0.) */ + for (i = 0; i < pagesize; ++i) + *(data2 + i) = *(data2 + i) + 1; + data3 = (char *) malloc (pagesize); + if (!data3) + exit (1); + if (read (fd, data3, pagesize) != pagesize) + exit (1); + for (i = 0; i < pagesize; ++i) + if (*(data + i) != *(data3 + i)) + exit (1); + close (fd); + exit (0); +} +_ACEOF +rm -f conftest$ac_exeext +if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5 + (eval $ac_link) 2>&5 + ac_status=$? + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); } && { ac_try='./conftest$ac_exeext' + { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5 + (eval $ac_try) 2>&5 + ac_status=$? + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); }; }; then + ac_cv_func_mmap_fixed_mapped=yes +else + echo "$as_me: program exited with status $ac_status" >&5 +echo "$as_me: failed program was:" >&5 +sed 's/^/| /' conftest.$ac_ext >&5 + +( exit $ac_status ) +ac_cv_func_mmap_fixed_mapped=no +fi +rm -f core *.core gmon.out bb.out conftest$ac_exeext conftest.$ac_objext conftest.$ac_ext +fi +fi +echo "$as_me:$LINENO: result: $ac_cv_func_mmap_fixed_mapped" >&5 +echo "${ECHO_T}$ac_cv_func_mmap_fixed_mapped" >&6 +if test $ac_cv_func_mmap_fixed_mapped = yes; then + +cat >>confdefs.h <<\_ACEOF +#define HAVE_MMAP 1 +_ACEOF + +fi +rm -f conftest.mmap + + + + +for ac_header in limits.h stddef.h unistd.h +do +as_ac_Header=`echo "ac_cv_header_$ac_header" | $as_tr_sh` +if eval "test \"\${$as_ac_Header+set}\" = set"; then + echo "$as_me:$LINENO: checking for $ac_header" >&5 +echo $ECHO_N "checking for $ac_header... $ECHO_C" >&6 +if eval "test \"\${$as_ac_Header+set}\" = set"; then + echo $ECHO_N "(cached) $ECHO_C" >&6 +fi +echo "$as_me:$LINENO: result: `eval echo '${'$as_ac_Header'}'`" >&5 +echo "${ECHO_T}`eval echo '${'$as_ac_Header'}'`" >&6 +else + # Is the header compilable? +echo "$as_me:$LINENO: checking $ac_header usability" >&5 +echo $ECHO_N "checking $ac_header usability... $ECHO_C" >&6 +cat >conftest.$ac_ext <<_ACEOF +/* confdefs.h. */ +_ACEOF +cat confdefs.h >>conftest.$ac_ext +cat >>conftest.$ac_ext <<_ACEOF +/* end confdefs.h. */ +$ac_includes_default +#include <$ac_header> +_ACEOF +rm -f conftest.$ac_objext +if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5 + (eval $ac_compile) 2>conftest.er1 + ac_status=$? + grep -v '^ *+' conftest.er1 >conftest.err + rm -f conftest.er1 + cat conftest.err >&5 + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); } && + { ac_try='test -z "$ac_c_werror_flag" || test ! -s conftest.err' + { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5 + (eval $ac_try) 2>&5 + ac_status=$? + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); }; } && + { ac_try='test -s conftest.$ac_objext' + { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5 + (eval $ac_try) 2>&5 + ac_status=$? + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); }; }; then + ac_header_compiler=yes +else + echo "$as_me: failed program was:" >&5 +sed 's/^/| /' conftest.$ac_ext >&5 + +ac_header_compiler=no +fi +rm -f conftest.err conftest.$ac_objext conftest.$ac_ext +echo "$as_me:$LINENO: result: $ac_header_compiler" >&5 +echo "${ECHO_T}$ac_header_compiler" >&6 + +# Is the header present? +echo "$as_me:$LINENO: checking $ac_header presence" >&5 +echo $ECHO_N "checking $ac_header presence... $ECHO_C" >&6 +cat >conftest.$ac_ext <<_ACEOF +/* confdefs.h. */ +_ACEOF +cat confdefs.h >>conftest.$ac_ext +cat >>conftest.$ac_ext <<_ACEOF +/* end confdefs.h. */ +#include <$ac_header> +_ACEOF +if { (eval echo "$as_me:$LINENO: \"$ac_cpp conftest.$ac_ext\"") >&5 + (eval $ac_cpp conftest.$ac_ext) 2>conftest.er1 + ac_status=$? + grep -v '^ *+' conftest.er1 >conftest.err + rm -f conftest.er1 + cat conftest.err >&5 + echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); } >/dev/null; then + if test -s conftest.err; then + ac_cpp_err=$ac_c_preproc_warn_flag + ac_cpp_err=$ac_cpp_err$ac_c_werror_flag + else + ac_cpp_err= + fi +else + ac_cpp_err=yes +fi +if test -z "$ac_cpp_err"; then + ac_header_preproc=yes +else + echo "$as_me: failed program was:" >&5 +sed 's/^/| /' conftest.$ac_ext >&5 + + ac_header_preproc=no +fi +rm -f conftest.err conftest.$ac_ext +echo "$as_me:$LINENO: result: $ac_header_preproc" >&5 +echo "${ECHO_T}$ac_header_preproc" >&6 + +# So? What about this header? +case $ac_header_compiler:$ac_header_preproc:$ac_c_preproc_warn_flag in + yes:no: ) + { echo "$as_me:$LINENO: WARNING: $ac_header: accepted by the compiler, rejected by the preprocessor!" >&5 +echo "$as_me: WARNING: $ac_header: accepted by the compiler, rejected by the preprocessor!" >&2;} + { echo "$as_me:$LINENO: WARNING: $ac_header: proceeding with the compiler's result" >&5 +echo "$as_me: WARNING: $ac_header: proceeding with the compiler's result" >&2;} + ac_header_preproc=yes + ;; + no:yes:* ) + { echo "$as_me:$LINENO: WARNING: $ac_header: present but cannot be compiled" >&5 +echo "$as_me: WARNING: $ac_header: present but cannot be compiled" >&2;} + { echo "$as_me:$LINENO: WARNING: $ac_header: check for missing prerequisite headers?" >&5 +echo "$as_me: WARNING: $ac_header: check for missing prerequisite headers?" >&2;} + { echo "$as_me:$LINENO: WARNING: $ac_header: see the Autoconf documentation" >&5 +echo "$as_me: WARNING: $ac_header: see the Autoconf documentation" >&2;} + { echo "$as_me:$LINENO: WARNING: $ac_header: section \"Present But Cannot Be Compiled\"" >&5 +echo "$as_me: WARNING: $ac_header: section \"Present But Cannot Be Compiled\"" >&2;} + { echo "$as_me:$LINENO: WARNING: $ac_header: proceeding with the preprocessor's result" >&5 +echo "$as_me: WARNING: $ac_header: proceeding with the preprocessor's result" >&2;} + { echo "$as_me:$LINENO: WARNING: $ac_header: in the future, the compiler will take precedence" >&5 +echo "$as_me: WARNING: $ac_header: in the future, the compiler will take precedence" >&2;} + ( + cat <<\_ASBOX +## ------------------------------------------ ## +## Report this to the AC_PACKAGE_NAME lists. ## +## ------------------------------------------ ## +_ASBOX + ) | + sed "s/^/$as_me: WARNING: /" >&2 + ;; +esac +echo "$as_me:$LINENO: checking for $ac_header" >&5 +echo $ECHO_N "checking for $ac_header... $ECHO_C" >&6 +if eval "test \"\${$as_ac_Header+set}\" = set"; then + echo $ECHO_N "(cached) $ECHO_C" >&6 +else + eval "$as_ac_Header=\$ac_header_preproc" +fi +echo "$as_me:$LINENO: result: `eval echo '${'$as_ac_Header'}'`" >&5 +echo "${ECHO_T}`eval echo '${'$as_ac_Header'}'`" >&6 + +fi +if test `eval echo '${'$as_ac_Header'}'` = yes; then + cat >>confdefs.h <<_ACEOF +#define `echo "HAVE_$ac_header" | $as_tr_cpp` 1 +_ACEOF + +fi + +done + + + + ac_config_files="$ac_config_files Makefile" +cat >confcache <<\_ACEOF +# This file is a shell script that caches the results of configure +# tests run on this system so they can be shared between configure +# scripts and configure runs, see configure's option --config-cache. +# It is not useful on other systems. If it contains results you don't +# want to keep, you may remove or edit it. +# +# config.status only pays attention to the cache file if you give it +# the --recheck option to rerun configure. +# +# `ac_cv_env_foo' variables (set or unset) will be overridden when +# loading this file, other *unset* `ac_cv_foo' will be assigned the +# following values. + +_ACEOF + +# The following way of writing the cache mishandles newlines in values, +# but we know of no workaround that is simple, portable, and efficient. +# So, don't put newlines in cache variables' values. +# Ultrix sh set writes to stderr and can't be redirected directly, +# and sets the high bit in the cache file unless we assign to the vars. +{ + (set) 2>&1 | + case `(ac_space=' '; set | grep ac_space) 2>&1` in + *ac_space=\ *) + # `set' does not quote correctly, so add quotes (double-quote + # substitution turns \\\\ into \\, and sed turns \\ into \). + sed -n \ + "s/'/'\\\\''/g; + s/^\\([_$as_cr_alnum]*_cv_[_$as_cr_alnum]*\\)=\\(.*\\)/\\1='\\2'/p" + ;; + *) + # `set' quotes correctly as required by POSIX, so do not add quotes. + sed -n \ + "s/^\\([_$as_cr_alnum]*_cv_[_$as_cr_alnum]*\\)=\\(.*\\)/\\1=\\2/p" + ;; + esac; +} | + sed ' + t clear + : clear + s/^\([^=]*\)=\(.*[{}].*\)$/test "${\1+set}" = set || &/ + t end + /^ac_cv_env/!s/^\([^=]*\)=\(.*\)$/\1=${\1=\2}/ + : end' >>confcache +if diff $cache_file confcache >/dev/null 2>&1; then :; else + if test -w $cache_file; then + test "x$cache_file" != "x/dev/null" && echo "updating cache $cache_file" + cat confcache >$cache_file + else + echo "not updating unwritable cache $cache_file" + fi +fi +rm -f confcache + +test "x$prefix" = xNONE && prefix=$ac_default_prefix +# Let make expand exec_prefix. +test "x$exec_prefix" = xNONE && exec_prefix='${prefix}' + +# VPATH may cause trouble with some makes, so we remove $(srcdir), +# ${srcdir} and @srcdir@ from VPATH if srcdir is ".", strip leading and +# trailing colons and then remove the whole line if VPATH becomes empty +# (actually we leave an empty line to preserve line numbers). +if test "x$srcdir" = x.; then + ac_vpsub='/^[ ]*VPATH[ ]*=/{ +s/:*\$(srcdir):*/:/; +s/:*\${srcdir}:*/:/; +s/:*@srcdir@:*/:/; +s/^\([^=]*=[ ]*\):*/\1/; +s/:*$//; +s/^[^=]*=[ ]*$//; +}' +fi + +# Transform confdefs.h into DEFS. +# Protect against shell expansion while executing Makefile rules. +# Protect against Makefile macro expansion. +# +# If the first sed substitution is executed (which looks for macros that +# take arguments), then we branch to the quote section. Otherwise, +# look for a macro that doesn't take arguments. +cat >confdef2opt.sed <<\_ACEOF +t clear +: clear +s,^[ ]*#[ ]*define[ ][ ]*\([^ (][^ (]*([^)]*)\)[ ]*\(.*\),-D\1=\2,g +t quote +s,^[ ]*#[ ]*define[ ][ ]*\([^ ][^ ]*\)[ ]*\(.*\),-D\1=\2,g +t quote +d +: quote +s,[ `~#$^&*(){}\\|;'"<>?],\\&,g +s,\[,\\&,g +s,\],\\&,g +s,\$,$$,g +p +_ACEOF +# We use echo to avoid assuming a particular line-breaking character. +# The extra dot is to prevent the shell from consuming trailing +# line-breaks from the sub-command output. A line-break within +# single-quotes doesn't work because, if this script is created in a +# platform that uses two characters for line-breaks (e.g., DOS), tr +# would break. +ac_LF_and_DOT=`echo; echo .` +DEFS=`sed -n -f confdef2opt.sed confdefs.h | tr "$ac_LF_and_DOT" ' .'` +rm -f confdef2opt.sed + + +ac_libobjs= +ac_ltlibobjs= +for ac_i in : $LIBOBJS; do test "x$ac_i" = x: && continue + # 1. Remove the extension, and $U if already installed. + ac_i=`echo "$ac_i" | + sed 's/\$U\././;s/\.o$//;s/\.obj$//'` + # 2. Add them. + ac_libobjs="$ac_libobjs $ac_i\$U.$ac_objext" + ac_ltlibobjs="$ac_ltlibobjs $ac_i"'$U.lo' +done +LIBOBJS=$ac_libobjs + +LTLIBOBJS=$ac_ltlibobjs + + + +: ${CONFIG_STATUS=./config.status} +ac_clean_files_save=$ac_clean_files +ac_clean_files="$ac_clean_files $CONFIG_STATUS" +{ echo "$as_me:$LINENO: creating $CONFIG_STATUS" >&5 +echo "$as_me: creating $CONFIG_STATUS" >&6;} +cat >$CONFIG_STATUS <<_ACEOF +#! $SHELL +# Generated by $as_me. +# Run this file to recreate the current configuration. +# Compiler output produced by configure, useful for debugging +# configure, is in config.log if it exists. + +debug=false +ac_cs_recheck=false +ac_cs_silent=false +SHELL=\${CONFIG_SHELL-$SHELL} +_ACEOF + +cat >>$CONFIG_STATUS <<\_ACEOF +## --------------------- ## +## M4sh Initialization. ## +## --------------------- ## + +# Be Bourne compatible +if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then + emulate sh + NULLCMD=: + # Zsh 3.x and 4.x performs word splitting on ${1+"$@"}, which + # is contrary to our usage. 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Generated by config.status. */ + if test x"$ac_file" = x-; then + configure_input= + else + configure_input="$ac_file. " + fi + configure_input=$configure_input"Generated from `echo $ac_file_in | + sed 's,.*/,,'` by configure." + + # First look for the input files in the build tree, otherwise in the + # src tree. + ac_file_inputs=`IFS=: + for f in $ac_file_in; do + case $f in + -) echo $tmp/stdin ;; + [\\/$]*) + # Absolute (can't be DOS-style, as IFS=:) + test -f "$f" || { { echo "$as_me:$LINENO: error: cannot find input file: $f" >&5 +echo "$as_me: error: cannot find input file: $f" >&2;} + { (exit 1); exit 1; }; } + echo "$f";; + *) # Relative + if test -f "$f"; then + # Build tree + echo "$f" + elif test -f "$srcdir/$f"; then + # Source tree + echo "$srcdir/$f" + else + # /dev/null tree + { { echo "$as_me:$LINENO: error: cannot find input file: $f" >&5 +echo "$as_me: error: cannot find input file: $f" >&2;} + { (exit 1); exit 1; }; } + fi;; + esac + done` || { (exit 1); exit 1; } + + if test x"$ac_file" != x-; then + { echo "$as_me:$LINENO: creating $ac_file" >&5 +echo "$as_me: creating $ac_file" >&6;} + rm -f "$ac_file" + fi +_ACEOF +cat >>$CONFIG_STATUS <<_ACEOF + sed "$ac_vpsub +$extrasub +_ACEOF +cat >>$CONFIG_STATUS <<\_ACEOF +:t +/@[a-zA-Z_][a-zA-Z_0-9]*@/!b +s,@configure_input@,$configure_input,;t t +s,@srcdir@,$ac_srcdir,;t t +s,@abs_srcdir@,$ac_abs_srcdir,;t t +s,@top_srcdir@,$ac_top_srcdir,;t t +s,@abs_top_srcdir@,$ac_abs_top_srcdir,;t t +s,@builddir@,$ac_builddir,;t t +s,@abs_builddir@,$ac_abs_builddir,;t t +s,@top_builddir@,$ac_top_builddir,;t t +s,@abs_top_builddir@,$ac_abs_top_builddir,;t t +" $ac_file_inputs | (eval "$ac_sed_cmds") >$tmp/out + rm -f $tmp/stdin + if test x"$ac_file" != x-; then + mv $tmp/out $ac_file + else + cat $tmp/out + rm -f $tmp/out + fi + +done +_ACEOF + +cat >>$CONFIG_STATUS <<\_ACEOF + +{ (exit 0); exit 0; } +_ACEOF +chmod +x $CONFIG_STATUS +ac_clean_files=$ac_clean_files_save + + +# configure is writing to config.log, and then calls config.status. +# config.status does its own redirection, appending to config.log. +# Unfortunately, on DOS this fails, as config.log is still kept open +# by configure, so config.status won't be able to write to it; its +# output is simply discarded. So we exec the FD to /dev/null, +# effectively closing config.log, so it can be properly (re)opened and +# appended to by config.status. When coming back to configure, we +# need to make the FD available again. +if test "$no_create" != yes; then + ac_cs_success=: + ac_config_status_args= + test "$silent" = yes && + ac_config_status_args="$ac_config_status_args --quiet" + exec 5>/dev/null + $SHELL $CONFIG_STATUS $ac_config_status_args || ac_cs_success=false + exec 5>>config.log + # Use ||, not &&, to avoid exiting from the if with $? = 1, which + # would make configure fail if this is the last instruction. + $ac_cs_success || { (exit 1); exit 1; } +fi + diff --git a/mmalloc/configure.in b/mmalloc/configure.in new file mode 100644 index 0000000..2b5430e --- /dev/null +++ b/mmalloc/configure.in @@ -0,0 +1,35 @@ +dnl Autoconf configure script for MMALLOC, the GNU mmemory allocator. +dnl Copyright 2000 Free Software Foundation, Inc. +dnl +dnl This file is part of GDB. +dnl +dnl This program is free software; you can redistribute it and/or modify +dnl it under the terms of the GNU General Public License as published by +dnl the Free Software Foundation; either version 2 of the License, or +dnl (at your option) any later version. +dnl +dnl This program is distributed in the hope that it will be useful, +dnl but WITHOUT ANY WARRANTY; without even the implied warranty of +dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +dnl GNU General Public License for more details. +dnl +dnl You should have received a copy of the GNU General Public License +dnl along with this program; if not, write to the Free Software +dnl Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. +dnl Process this file with autoconf to produce a configure script. + +AC_PREREQ(2.12.1)dnl +AC_INIT(mmalloc.c) + +AC_PROG_CC +dnl AC_PROG_INSTALL +AC_CHECK_TOOL(AR, ar) +AC_CHECK_TOOL(RANLIB, ranlib, :) + +AC_FUNC_MMAP +AC_CHECK_HEADERS(limits.h stddef.h unistd.h) + +dnl BFD_NEED_DECLARATION(sbrk) +dnl BFD_NEED_DECLARATION(getpagesize) + +AC_OUTPUT(Makefile) diff --git a/mmalloc/detach.c b/mmalloc/detach.c new file mode 100644 index 0000000..1780679 --- /dev/null +++ b/mmalloc/detach.c @@ -0,0 +1,71 @@ +/* Finish access to a mmap'd malloc managed region. + Copyright 1992 Free Software Foundation, Inc. + + Contributed by Fred Fish at Cygnus Support. fnf@cygnus.com + +This file is part of the GNU C Library. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. */ + +#include +#include "mmprivate.h" + +/* Terminate access to a mmalloc managed region by unmapping all memory pages + associated with the region, and closing the file descriptor if it is one + that we opened. + + Returns NULL on success. + + Returns the malloc descriptor on failure, which can subsequently be used + for further action, such as obtaining more information about the nature of + the failure by examining the preserved errno value. + + Note that the malloc descriptor that we are using is currently located in + region we are about to unmap, so we first make a local copy of it on the + stack and use the copy. */ + +PTR +mmalloc_detach (md) + PTR md; +{ + struct mdesc mtemp; + + if (md != NULL) + { + + mtemp = *(struct mdesc *) md; + + /* Now unmap all the pages associated with this region by asking for a + negative increment equal to the current size of the region. */ + + if ((mtemp.morecore (&mtemp, mtemp.base - mtemp.breakval)) == NULL) + { + /* Deallocating failed. Update the original malloc descriptor + with any changes */ + *(struct mdesc *) md = mtemp; + } + else + { + if (mtemp.flags & MMALLOC_DEVZERO) + { + close (mtemp.fd); + } + md = NULL; + } + } + + return (md); +} diff --git a/mmalloc/keys.c b/mmalloc/keys.c new file mode 100644 index 0000000..35f00d1 --- /dev/null +++ b/mmalloc/keys.c @@ -0,0 +1,66 @@ +/* Access for application keys in mmap'd malloc managed region. + Copyright 1992 Free Software Foundation, Inc. + + Contributed by Fred Fish at Cygnus Support. fnf@cygnus.com + +This file is part of the GNU C Library. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. */ + +/* This module provides access to some keys that the application can use to + provide persistent access to locations in the mapped memory section. + The intent is that these keys are to be used sparingly as sort of + persistent global variables which the application can use to reinitialize + access to data in the mapped region. + + For the moment, these keys are simply stored in the malloc descriptor + itself, in an array of fixed length. This should be fixed so that there + can be an unlimited number of keys, possibly using a multilevel access + scheme of some sort. */ + +#include "mmprivate.h" + +int +mmalloc_setkey (md, keynum, key) + PTR md; + int keynum; + PTR key; +{ + struct mdesc *mdp = (struct mdesc *) md; + int result = 0; + + if ((mdp != NULL) && (keynum >= 0) && (keynum < MMALLOC_KEYS)) + { + mdp -> keys [keynum] = key; + result++; + } + return (result); +} + +PTR +mmalloc_getkey (md, keynum) + PTR md; + int keynum; +{ + struct mdesc *mdp = (struct mdesc *) md; + PTR keyval = NULL; + + if ((mdp != NULL) && (keynum >= 0) && (keynum < MMALLOC_KEYS)) + { + keyval = mdp -> keys [keynum]; + } + return (keyval); +} diff --git a/mmalloc/mcalloc.c b/mmalloc/mcalloc.c new file mode 100644 index 0000000..c9fcc07 --- /dev/null +++ b/mmalloc/mcalloc.c @@ -0,0 +1,54 @@ +/* Copyright (C) 1991, 1992 Free Software Foundation, Inc. +This file is part of the GNU C Library. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. */ + +#include /* GCC on HP/UX needs this before string.h. */ +#include /* Prototypes for memcpy, memmove, memset, etc */ + +#include "mmprivate.h" + +/* Allocate an array of NMEMB elements each SIZE bytes long. + The entire array is initialized to zeros. */ + +PTR +mcalloc (md, nmemb, size) + PTR md; + register size_t nmemb; + register size_t size; +{ + register PTR result; + + if ((result = mmalloc (md, nmemb * size)) != NULL) + { + memset (result, 0, nmemb * size); + } + return (result); +} + +/* When using this package, provide a version of malloc/realloc/free built + on top of it, so that if we use the default sbrk() region we will not + collide with another malloc package trying to do the same thing, if + the application contains any "hidden" calls to malloc/realloc/free (such + as inside a system library). */ + +PTR +calloc (nmemb, size) + size_t nmemb; + size_t size; +{ + return (mcalloc ((PTR) NULL, nmemb, size)); +} diff --git a/mmalloc/mfree.c b/mmalloc/mfree.c new file mode 100644 index 0000000..c509ac6 --- /dev/null +++ b/mmalloc/mfree.c @@ -0,0 +1,247 @@ +/* Free a block of memory allocated by `mmalloc'. + Copyright 1990, 1991, 1992 Free Software Foundation + + Written May 1989 by Mike Haertel. + Heavily modified Mar 1992 by Fred Fish. (fnf@cygnus.com) + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. + + The author may be reached (Email) at the address mike@ai.mit.edu, + or (US mail) as Mike Haertel c/o Free Software Foundation. */ + +#include "mmprivate.h" + +/* Return memory to the heap. + Like `mfree' but don't call a mfree_hook if there is one. */ + +void +__mmalloc_free (mdp, ptr) + struct mdesc *mdp; + PTR ptr; +{ + int type; + size_t block, blocks; + register size_t i; + struct list *prev, *next; + + block = BLOCK (ptr); + + type = mdp -> heapinfo[block].busy.type; + switch (type) + { + case 0: + /* Get as many statistics as early as we can. */ + mdp -> heapstats.chunks_used--; + mdp -> heapstats.bytes_used -= + mdp -> heapinfo[block].busy.info.size * BLOCKSIZE; + mdp -> heapstats.bytes_free += + mdp -> heapinfo[block].busy.info.size * BLOCKSIZE; + + /* Find the free cluster previous to this one in the free list. + Start searching at the last block referenced; this may benefit + programs with locality of allocation. */ + i = mdp -> heapindex; + if (i > block) + { + while (i > block) + { + i = mdp -> heapinfo[i].free.prev; + } + } + else + { + do + { + i = mdp -> heapinfo[i].free.next; + } + while ((i != 0) && (i < block)); + i = mdp -> heapinfo[i].free.prev; + } + + /* Determine how to link this block into the free list. */ + if (block == i + mdp -> heapinfo[i].free.size) + { + /* Coalesce this block with its predecessor. */ + mdp -> heapinfo[i].free.size += + mdp -> heapinfo[block].busy.info.size; + block = i; + } + else + { + /* Really link this block back into the free list. */ + mdp -> heapinfo[block].free.size = + mdp -> heapinfo[block].busy.info.size; + mdp -> heapinfo[block].free.next = mdp -> heapinfo[i].free.next; + mdp -> heapinfo[block].free.prev = i; + mdp -> heapinfo[i].free.next = block; + mdp -> heapinfo[mdp -> heapinfo[block].free.next].free.prev = block; + mdp -> heapstats.chunks_free++; + } + + /* Now that the block is linked in, see if we can coalesce it + with its successor (by deleting its successor from the list + and adding in its size). */ + if (block + mdp -> heapinfo[block].free.size == + mdp -> heapinfo[block].free.next) + { + mdp -> heapinfo[block].free.size + += mdp -> heapinfo[mdp -> heapinfo[block].free.next].free.size; + mdp -> heapinfo[block].free.next + = mdp -> heapinfo[mdp -> heapinfo[block].free.next].free.next; + mdp -> heapinfo[mdp -> heapinfo[block].free.next].free.prev = block; + mdp -> heapstats.chunks_free--; + } + + /* Now see if we can return stuff to the system. */ + blocks = mdp -> heapinfo[block].free.size; + if (blocks >= FINAL_FREE_BLOCKS && block + blocks == mdp -> heaplimit + && mdp -> morecore (mdp, 0) == ADDRESS (block + blocks)) + { + register size_t bytes = blocks * BLOCKSIZE; + mdp -> heaplimit -= blocks; + mdp -> morecore (mdp, -bytes); + mdp -> heapinfo[mdp -> heapinfo[block].free.prev].free.next + = mdp -> heapinfo[block].free.next; + mdp -> heapinfo[mdp -> heapinfo[block].free.next].free.prev + = mdp -> heapinfo[block].free.prev; + block = mdp -> heapinfo[block].free.prev; + mdp -> heapstats.chunks_free--; + mdp -> heapstats.bytes_free -= bytes; + } + + /* Set the next search to begin at this block. */ + mdp -> heapindex = block; + break; + + default: + /* Do some of the statistics. */ + mdp -> heapstats.chunks_used--; + mdp -> heapstats.bytes_used -= 1 << type; + mdp -> heapstats.chunks_free++; + mdp -> heapstats.bytes_free += 1 << type; + + /* Get the address of the first free fragment in this block. */ + prev = (struct list *) + ((char *) ADDRESS(block) + + (mdp -> heapinfo[block].busy.info.frag.first << type)); + + if (mdp -> heapinfo[block].busy.info.frag.nfree == + (BLOCKSIZE >> type) - 1) + { + /* If all fragments of this block are free, remove them + from the fragment list and free the whole block. */ + next = prev; + for (i = 1; i < (size_t) (BLOCKSIZE >> type); ++i) + { + next = next -> next; + } + prev -> prev -> next = next; + if (next != NULL) + { + next -> prev = prev -> prev; + } + mdp -> heapinfo[block].busy.type = 0; + mdp -> heapinfo[block].busy.info.size = 1; + + /* Keep the statistics accurate. */ + mdp -> heapstats.chunks_used++; + mdp -> heapstats.bytes_used += BLOCKSIZE; + mdp -> heapstats.chunks_free -= BLOCKSIZE >> type; + mdp -> heapstats.bytes_free -= BLOCKSIZE; + + mfree ((PTR) mdp, (PTR) ADDRESS(block)); + } + else if (mdp -> heapinfo[block].busy.info.frag.nfree != 0) + { + /* If some fragments of this block are free, link this + fragment into the fragment list after the first free + fragment of this block. */ + next = (struct list *) ptr; + next -> next = prev -> next; + next -> prev = prev; + prev -> next = next; + if (next -> next != NULL) + { + next -> next -> prev = next; + } + ++mdp -> heapinfo[block].busy.info.frag.nfree; + } + else + { + /* No fragments of this block are free, so link this + fragment into the fragment list and announce that + it is the first free fragment of this block. */ + prev = (struct list *) ptr; + mdp -> heapinfo[block].busy.info.frag.nfree = 1; + mdp -> heapinfo[block].busy.info.frag.first = + RESIDUAL (ptr, BLOCKSIZE) >> type; + prev -> next = mdp -> fraghead[type].next; + prev -> prev = &mdp -> fraghead[type]; + prev -> prev -> next = prev; + if (prev -> next != NULL) + { + prev -> next -> prev = prev; + } + } + break; + } +} + +/* Return memory to the heap. */ + +void +mfree (md, ptr) + PTR md; + PTR ptr; +{ + struct mdesc *mdp; + register struct alignlist *l; + + if (ptr != NULL) + { + mdp = MD_TO_MDP (md); + for (l = mdp -> aligned_blocks; l != NULL; l = l -> next) + { + if (l -> aligned == ptr) + { + l -> aligned = NULL; /* Mark the slot in the list as free. */ + ptr = l -> exact; + break; + } + } + if (mdp -> mfree_hook != NULL) + { + (*mdp -> mfree_hook) (md, ptr); + } + else + { + __mmalloc_free (mdp, ptr); + } + } +} + +/* When using this package, provide a version of malloc/realloc/free built + on top of it, so that if we use the default sbrk() region we will not + collide with another malloc package trying to do the same thing, if + the application contains any "hidden" calls to malloc/realloc/free (such + as inside a system library). */ + +void +free (ptr) + PTR ptr; +{ + mfree ((PTR) NULL, ptr); +} diff --git a/mmalloc/mm.c b/mmalloc/mm.c new file mode 100644 index 0000000..d487e0c --- /dev/null +++ b/mmalloc/mm.c @@ -0,0 +1,40 @@ +/* Build the entire mmalloc library as a single object module. This + avoids having clients pick up part of their allocation routines + from mmalloc and part from libc, which results in undefined + behavior. It should also still be possible to build the library + as a standard library with multiple objects. + + Copyright 1996, 2000 Free Software Foundation + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. */ + +#ifdef HAVE_UNISTD_H +#include /* Prototypes for lseek, sbrk (maybe) */ +#endif +#include "mcalloc.c" +#include "mfree.c" +#include "mmalloc.c" +#include "mmcheck.c" +#include "mmemalign.c" +#include "mmstats.c" +#include "mmtrace.c" +#include "mrealloc.c" +#include "mvalloc.c" +#include "mmap-sup.c" +#include "attach.c" +#include "detach.c" +#include "keys.c" +#include "sbrk-sup.c" diff --git a/mmalloc/mmalloc.c b/mmalloc/mmalloc.c new file mode 100644 index 0000000..7c60fe2 --- /dev/null +++ b/mmalloc/mmalloc.c @@ -0,0 +1,337 @@ +/* Memory allocator `malloc'. + Copyright 1990, 1991, 1992 Free Software Foundation + + Written May 1989 by Mike Haertel. + Heavily modified Mar 1992 by Fred Fish for mmap'd version. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. + + The author may be reached (Email) at the address mike@ai.mit.edu, + or (US mail) as Mike Haertel c/o Free Software Foundation. */ + +#include /* Prototypes for memcpy, memmove, memset, etc */ + +#include "mmprivate.h" + +/* Prototypes for local functions */ + +static int initialize PARAMS ((struct mdesc *)); +static PTR morecore PARAMS ((struct mdesc *, size_t)); +static PTR align PARAMS ((struct mdesc *, size_t)); + +/* Aligned allocation. */ + +static PTR +align (mdp, size) + struct mdesc *mdp; + size_t size; +{ + PTR result; + unsigned long int adj; + + result = mdp -> morecore (mdp, size); + adj = RESIDUAL (result, BLOCKSIZE); + if (adj != 0) + { + adj = BLOCKSIZE - adj; + mdp -> morecore (mdp, adj); + result = (char *) result + adj; + } + return (result); +} + +/* Set everything up and remember that we have. */ + +static int +initialize (mdp) + struct mdesc *mdp; +{ + mdp -> heapsize = HEAP / BLOCKSIZE; + mdp -> heapinfo = (malloc_info *) + align (mdp, mdp -> heapsize * sizeof (malloc_info)); + if (mdp -> heapinfo == NULL) + { + return (0); + } + memset ((PTR)mdp -> heapinfo, 0, mdp -> heapsize * sizeof (malloc_info)); + mdp -> heapinfo[0].free.size = 0; + mdp -> heapinfo[0].free.next = mdp -> heapinfo[0].free.prev = 0; + mdp -> heapindex = 0; + mdp -> heapbase = (char *) mdp -> heapinfo; + mdp -> flags |= MMALLOC_INITIALIZED; + return (1); +} + +/* Get neatly aligned memory, initializing or + growing the heap info table as necessary. */ + +static PTR +morecore (mdp, size) + struct mdesc *mdp; + size_t size; +{ + PTR result; + malloc_info *newinfo, *oldinfo; + size_t newsize; + + result = align (mdp, size); + if (result == NULL) + { + return (NULL); + } + + /* Check if we need to grow the info table. */ + if ((size_t) BLOCK ((char *) result + size) > mdp -> heapsize) + { + newsize = mdp -> heapsize; + while ((size_t) BLOCK ((char *) result + size) > newsize) + { + newsize *= 2; + } + newinfo = (malloc_info *) align (mdp, newsize * sizeof (malloc_info)); + if (newinfo == NULL) + { + mdp -> morecore (mdp, -size); + return (NULL); + } + memset ((PTR) newinfo, 0, newsize * sizeof (malloc_info)); + memcpy ((PTR) newinfo, (PTR) mdp -> heapinfo, + mdp -> heapsize * sizeof (malloc_info)); + oldinfo = mdp -> heapinfo; + newinfo[BLOCK (oldinfo)].busy.type = 0; + newinfo[BLOCK (oldinfo)].busy.info.size + = BLOCKIFY (mdp -> heapsize * sizeof (malloc_info)); + mdp -> heapinfo = newinfo; + __mmalloc_free (mdp, (PTR)oldinfo); + mdp -> heapsize = newsize; + } + + mdp -> heaplimit = BLOCK ((char *) result + size); + return (result); +} + +/* Allocate memory from the heap. */ + +PTR +mmalloc (md, size) + PTR md; + size_t size; +{ + struct mdesc *mdp; + PTR result; + size_t block, blocks, lastblocks, start; + register size_t i; + struct list *next; + register size_t log; + + if (size == 0) + { + return (NULL); + } + + mdp = MD_TO_MDP (md); + + if (mdp -> mmalloc_hook != NULL) + { + return ((*mdp -> mmalloc_hook) (md, size)); + } + + if (!(mdp -> flags & MMALLOC_INITIALIZED)) + { + if (!initialize (mdp)) + { + return (NULL); + } + } + + if (size < sizeof (struct list)) + { + size = sizeof (struct list); + } + + /* Determine the allocation policy based on the request size. */ + if (size <= BLOCKSIZE / 2) + { + /* Small allocation to receive a fragment of a block. + Determine the logarithm to base two of the fragment size. */ + log = 1; + --size; + while ((size /= 2) != 0) + { + ++log; + } + + /* Look in the fragment lists for a + free fragment of the desired size. */ + next = mdp -> fraghead[log].next; + if (next != NULL) + { + /* There are free fragments of this size. + Pop a fragment out of the fragment list and return it. + Update the block's nfree and first counters. */ + result = (PTR) next; + next -> prev -> next = next -> next; + if (next -> next != NULL) + { + next -> next -> prev = next -> prev; + } + block = BLOCK (result); + if (--mdp -> heapinfo[block].busy.info.frag.nfree != 0) + { + mdp -> heapinfo[block].busy.info.frag.first = + RESIDUAL (next -> next, BLOCKSIZE) >> log; + } + + /* Update the statistics. */ + mdp -> heapstats.chunks_used++; + mdp -> heapstats.bytes_used += 1 << log; + mdp -> heapstats.chunks_free--; + mdp -> heapstats.bytes_free -= 1 << log; + } + else + { + /* No free fragments of the desired size, so get a new block + and break it into fragments, returning the first. */ + result = mmalloc (md, BLOCKSIZE); + if (result == NULL) + { + return (NULL); + } + + /* Link all fragments but the first into the free list. */ + for (i = 1; i < (size_t) (BLOCKSIZE >> log); ++i) + { + next = (struct list *) ((char *) result + (i << log)); + next -> next = mdp -> fraghead[log].next; + next -> prev = &mdp -> fraghead[log]; + next -> prev -> next = next; + if (next -> next != NULL) + { + next -> next -> prev = next; + } + } + + /* Initialize the nfree and first counters for this block. */ + block = BLOCK (result); + mdp -> heapinfo[block].busy.type = log; + mdp -> heapinfo[block].busy.info.frag.nfree = i - 1; + mdp -> heapinfo[block].busy.info.frag.first = i - 1; + + mdp -> heapstats.chunks_free += (BLOCKSIZE >> log) - 1; + mdp -> heapstats.bytes_free += BLOCKSIZE - (1 << log); + mdp -> heapstats.bytes_used -= BLOCKSIZE - (1 << log); + } + } + else + { + /* Large allocation to receive one or more blocks. + Search the free list in a circle starting at the last place visited. + If we loop completely around without finding a large enough + space we will have to get more memory from the system. */ + blocks = BLOCKIFY(size); + start = block = MALLOC_SEARCH_START; + while (mdp -> heapinfo[block].free.size < blocks) + { + block = mdp -> heapinfo[block].free.next; + if (block == start) + { + /* Need to get more from the system. Check to see if + the new core will be contiguous with the final free + block; if so we don't need to get as much. */ + block = mdp -> heapinfo[0].free.prev; + lastblocks = mdp -> heapinfo[block].free.size; + if (mdp -> heaplimit != 0 && + block + lastblocks == mdp -> heaplimit && + mdp -> morecore (mdp, 0) == ADDRESS(block + lastblocks) && + (morecore (mdp, (blocks - lastblocks) * BLOCKSIZE)) != NULL) + { + /* Which block we are extending (the `final free + block' referred to above) might have changed, if + it got combined with a freed info table. */ + block = mdp -> heapinfo[0].free.prev; + + mdp -> heapinfo[block].free.size += (blocks - lastblocks); + mdp -> heapstats.bytes_free += + (blocks - lastblocks) * BLOCKSIZE; + continue; + } + result = morecore(mdp, blocks * BLOCKSIZE); + if (result == NULL) + { + return (NULL); + } + block = BLOCK (result); + mdp -> heapinfo[block].busy.type = 0; + mdp -> heapinfo[block].busy.info.size = blocks; + mdp -> heapstats.chunks_used++; + mdp -> heapstats.bytes_used += blocks * BLOCKSIZE; + return (result); + } + } + + /* At this point we have found a suitable free list entry. + Figure out how to remove what we need from the list. */ + result = ADDRESS(block); + if (mdp -> heapinfo[block].free.size > blocks) + { + /* The block we found has a bit left over, + so relink the tail end back into the free list. */ + mdp -> heapinfo[block + blocks].free.size + = mdp -> heapinfo[block].free.size - blocks; + mdp -> heapinfo[block + blocks].free.next + = mdp -> heapinfo[block].free.next; + mdp -> heapinfo[block + blocks].free.prev + = mdp -> heapinfo[block].free.prev; + mdp -> heapinfo[mdp -> heapinfo[block].free.prev].free.next + = mdp -> heapinfo[mdp -> heapinfo[block].free.next].free.prev + = mdp -> heapindex = block + blocks; + } + else + { + /* The block exactly matches our requirements, + so just remove it from the list. */ + mdp -> heapinfo[mdp -> heapinfo[block].free.next].free.prev + = mdp -> heapinfo[block].free.prev; + mdp -> heapinfo[mdp -> heapinfo[block].free.prev].free.next + = mdp -> heapindex = mdp -> heapinfo[block].free.next; + mdp -> heapstats.chunks_free--; + } + + mdp -> heapinfo[block].busy.type = 0; + mdp -> heapinfo[block].busy.info.size = blocks; + mdp -> heapstats.chunks_used++; + mdp -> heapstats.bytes_used += blocks * BLOCKSIZE; + mdp -> heapstats.bytes_free -= blocks * BLOCKSIZE; + } + + return (result); +} + +/* When using this package, provide a version of malloc/realloc/free built + on top of it, so that if we use the default sbrk() region we will not + collide with another malloc package trying to do the same thing, if + the application contains any "hidden" calls to malloc/realloc/free (such + as inside a system library). */ + +PTR +malloc (size) + size_t size; +{ + PTR result; + + result = mmalloc ((PTR) NULL, size); + return (result); +} diff --git a/mmalloc/mmalloc.h b/mmalloc/mmalloc.h new file mode 100644 index 0000000..082547e --- /dev/null +++ b/mmalloc/mmalloc.h @@ -0,0 +1,62 @@ +#ifndef MMALLOC_H +#define MMALLOC_H 1 + +#ifdef HAVE_STDDEF_H +# include +#else +# include /* for size_t */ +# include /* for NULL */ +#endif + +#include "ansidecl.h" + +/* Allocate SIZE bytes of memory. */ + +extern PTR mmalloc PARAMS ((PTR, size_t)); + +/* Re-allocate the previously allocated block in PTR, making the new block + SIZE bytes long. */ + +extern PTR mrealloc PARAMS ((PTR, PTR, size_t)); + +/* Allocate NMEMB elements of SIZE bytes each, all initialized to 0. */ + +extern PTR mcalloc PARAMS ((PTR, size_t, size_t)); + +/* Free a block allocated by `mmalloc', `mrealloc' or `mcalloc'. */ + +extern void mfree PARAMS ((PTR, PTR)); + +/* Allocate SIZE bytes allocated to ALIGNMENT bytes. */ + +extern PTR mmemalign PARAMS ((PTR, size_t, size_t)); + +/* Allocate SIZE bytes on a page boundary. */ + +extern PTR mvalloc PARAMS ((PTR, size_t)); + +/* Activate a standard collection of debugging hooks. */ + +extern int mmcheck PARAMS ((PTR, void (*) (void))); + +extern int mmcheckf PARAMS ((PTR, void (*) (void), int)); + +/* Pick up the current statistics. (see FIXME elsewhere) */ + +extern struct mstats mmstats PARAMS ((PTR)); + +extern PTR mmalloc_attach PARAMS ((int, PTR)); + +extern PTR mmalloc_detach PARAMS ((PTR)); + +extern int mmalloc_setkey PARAMS ((PTR, int, PTR)); + +extern PTR mmalloc_getkey PARAMS ((PTR, int)); + +extern int mmalloc_errno PARAMS ((PTR)); + +extern int mmtrace PARAMS ((void)); + +extern PTR mmalloc_findbase PARAMS ((int)); + +#endif /* MMALLOC_H */ diff --git a/mmalloc/mmalloc.texi b/mmalloc/mmalloc.texi new file mode 100644 index 0000000..ce950d4 --- /dev/null +++ b/mmalloc/mmalloc.texi @@ -0,0 +1,258 @@ +\input texinfo @c -*- Texinfo -*- +@setfilename mmalloc.info + +@ifinfo +@format +START-INFO-DIR-ENTRY +* Mmalloc: (mmalloc). The GNU mapped-malloc package. +END-INFO-DIR-ENTRY +@end format + +This file documents the GNU mmalloc (mapped-malloc) package, written by +fnf@@cygnus.com, based on GNU malloc written by mike@@ai.mit.edu. + +Copyright (C) 1992 Free Software Foundation, Inc. + +Permission is granted to make and distribute verbatim copies of +this manual provided the copyright notice and this permission notice +are preserved on all copies. + +@ignore +Permission is granted to process this file through Tex and print the +results, provided the printed document carries copying permission +notice identical to this one except for the removal of this paragraph +(this paragraph not being relevant to the printed manual). + +@end ignore +Permission is granted to copy and distribute modified versions of this +manual under the conditions for verbatim copying, provided also that the +entire resulting derived work is distributed under the terms of a +permission notice identical to this one. + +Permission is granted to copy and distribute translations of this manual +into another language, under the above conditions for modified versions. +@end ifinfo +@iftex +@c @finalout +@setchapternewpage odd +@settitle MMALLOC, the GNU memory-mapped malloc package +@titlepage +@title mmalloc +@subtitle The GNU memory-mapped malloc package +@author Fred Fish +@author Cygnus Support +@author Mike Haertel +@author Free Software Foundation +@page + +@tex +\def\$#1${{#1}} % Kluge: collect RCS revision info without $...$ +\xdef\manvers{\$Revision: 1.1 $} % For use in headers, footers too +{\parskip=0pt +\hfill Cygnus Support\par +\hfill fnf\@cygnus.com\par +\hfill {\it MMALLOC, the GNU memory-mapped malloc package}, \manvers\par +\hfill \TeX{}info \texinfoversion\par +} +@end tex + +@vskip 0pt plus 1filll +Copyright @copyright{} 1992 Free Software Foundation, Inc. + +Permission is granted to make and distribute verbatim copies of +this manual provided the copyright notice and this permission notice +are preserved on all copies. + +Permission is granted to copy and distribute modified versions of this +manual under the conditions for verbatim copying, provided also that +the entire resulting derived work is distributed under the terms of a +permission notice identical to this one. + +Permission is granted to copy and distribute translations of this manual +into another language, under the above conditions for modified versions. +@end titlepage +@end iftex + +@ifinfo +@node Top, Overview, (dir), (dir) +@top mmalloc +This file documents the GNU memory-mapped malloc package mmalloc. + +@menu +* Overview:: Overall Description +* Implementation:: Implementation + + --- The Detailed Node Listing --- + +Implementation + +* Compatibility:: Backwards Compatibility +* Functions:: Function Descriptions +@end menu + +@end ifinfo + +@node Overview, Implementation, Top, Top +@chapter Overall Description + +This is a heavily modified version of GNU @code{malloc}. It uses +@code{mmap} as the basic mechanism for obtaining memory from the +system, rather than @code{sbrk}. This gives it several advantages over the +more traditional malloc: + +@itemize @bullet +@item +Several different heaps can be used, each of them growing +or shinking under control of @code{mmap}, with the @code{mmalloc} functions +using a specific heap on a call by call basis. + +@item +By using @code{mmap}, it is easy to create heaps which are intended to +be persistent and exist as a filesystem object after the creating +process has gone away. + +@item +Because multiple heaps can be managed, data used for a +specific purpose can be allocated into its own heap, making +it easier to allow applications to ``dump'' and ``restore'' initialized +malloc-managed memory regions. For example, the ``unexec'' hack popularized +by GNU Emacs could potentially go away. +@end itemize + +@node Implementation, , Overview, Top +@chapter Implementation + +The @code{mmalloc} functions contain no internal static state. All +@code{mmalloc} internal data is allocated in the mapped in region, along +with the user data that it manages. This allows it to manage multiple +such regions and to ``pick up where it left off'' when such regions are +later dynamically mapped back in. + +In some sense, malloc has been ``purified'' to contain no internal state +information and generalized to use multiple memory regions rather than a +single region managed by @code{sbrk}. However the new routines now need an +extra parameter which informs @code{mmalloc} which memory region it is dealing +with (along with other information). This parameter is called the +@dfn{malloc descriptor}. + +The functions initially provided by @code{mmalloc} are: + +@example +void *mmalloc_attach (int fd, void *baseaddr); +void *mmalloc_detach (void *md); +int mmalloc_errno (void *md); +int mmalloc_setkey (void *md, int keynum, void *key); +void *mmalloc_getkey (void *md, int keynum); + +void *mmalloc (void *md, size_t size); +void *mrealloc (void *md, void *ptr, size_t size); +void *mvalloc (void *md, size_t size); +void mfree (void *md, void *ptr); +@end example + +@menu +* Compatibility:: Backwards Compatibility +* Functions:: Function Descriptions +@end menu + +@node Compatibility, Functions, Implementation, Implementation +@section Backwards Compatibility + +To allow a single malloc package to be used in a given application, +provision is made for the traditional @code{malloc}, @code{realloc}, and +@code{free} functions to be implemented as special cases of the +@code{mmalloc} functions. In particular, if any of the functions that +expect malloc descriptors are called with a @code{NULL} pointer rather than a +valid malloc descriptor, then they default to using an @code{sbrk} managed +region. +The @code{mmalloc} package provides compatible @code{malloc}, @code{realloc}, +and @code{free} functions using this mechanism internally. +Applications can avoid this extra interface layer by simply including the +following defines: + +@example +#define malloc(size) mmalloc ((void *)0, (size)) +#define realloc(ptr,size) mrealloc ((void *)0, (ptr), (size)); +#define free(ptr) mfree ((void *)0, (ptr)) +@end example + +@noindent +or replace the existing @code{malloc}, @code{realloc}, and @code{free} +calls with the above patterns if using @code{#define} causes problems. + +@node Functions, , Compatibility, Implementation +@section Function Descriptions + +These are the details on the functions that make up the @code{mmalloc} +package. + +@table @code +@item void *mmalloc_attach (int @var{fd}, void *@var{baseaddr}); +Initialize access to a @code{mmalloc} managed region. + +If @var{fd} is a valid file descriptor for an open file, then data for the +@code{mmalloc} managed region is mapped to that file. Otherwise +@file{/dev/zero} is used and the data will not exist in any filesystem object. + +If the open file corresponding to @var{fd} is from a previous use of +@code{mmalloc} and passes some basic sanity checks to ensure that it is +compatible with the current @code{mmalloc} package, then its data is +mapped in and is immediately accessible at the same addresses in +the current process as the process that created the file. + +If @var{baseaddr} is not @code{NULL}, the mapping is established +starting at the specified address in the process address space. If +@var{baseaddr} is @code{NULL}, the @code{mmalloc} package chooses a +suitable address at which to start the mapped region, which will be the +value of the previous mapping if opening an existing file which was +previously built by @code{mmalloc}, or for new files will be a value +chosen by @code{mmap}. + +Specifying @var{baseaddr} provides more control over where the regions +start and how big they can be before bumping into existing mapped +regions or future mapped regions. + +On success, returns a malloc descriptor which is used in subsequent +calls to other @code{mmalloc} package functions. It is explicitly +@samp{void *} (@samp{char *} for systems that don't fully support +@code{void}) so that users of the package don't have to worry about the +actual implementation details. + +On failure returns @code{NULL}. + +@item void *mmalloc_detach (void *@var{md}); +Terminate access to a @code{mmalloc} managed region identified by the +descriptor @var{md}, by closing the base file and unmapping all memory +pages associated with the region. + +Returns @code{NULL} on success. + +Returns the malloc descriptor on failure, which can subsequently +be used for further action (such as obtaining more information about +the nature of the failure). + +@item void *mmalloc (void *@var{md}, size_t @var{size}); +Given an @code{mmalloc} descriptor @var{md}, allocate additional memory of +@var{size} bytes in the associated mapped region. + +@item *mrealloc (void *@var{md}, void *@var{ptr}, size_t @var{size}); +Given an @code{mmalloc} descriptor @var{md} and a pointer to memory +previously allocated by @code{mmalloc} in @var{ptr}, reallocate the +memory to be @var{size} bytes long, possibly moving the existing +contents of memory if necessary. + +@item void *mvalloc (void *@var{md}, size_t @var{size}); +Like @code{mmalloc} but the resulting memory is aligned on a page boundary. + +@item void mfree (void *@var{md}, void *@var{ptr}); +Given an @code{mmalloc} descriptor @var{md} and a pointer to memory previously +allocated by @code{mmalloc} in @var{ptr}, free the previously allocated memory. + +@item int mmalloc_errno (void *@var{md}); +Given a @code{mmalloc} descriptor, if the last @code{mmalloc} operation +failed for some reason due to a system call failure, then +returns the associated @code{errno}. Returns 0 otherwise. +(This function is not yet implemented). +@end table + +@bye diff --git a/mmalloc/mmap-sup.c b/mmalloc/mmap-sup.c new file mode 100644 index 0000000..b12e43c --- /dev/null +++ b/mmalloc/mmap-sup.c @@ -0,0 +1,220 @@ +/* Support for an sbrk-like function that uses mmap. + Copyright 1992, 2000 Free Software Foundation, Inc. + + Contributed by Fred Fish at Cygnus Support. fnf@cygnus.com + +This file is part of the GNU C Library. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. */ + +#if defined(HAVE_MMAP) + +#ifdef HAVE_UNISTD_H +#include /* Prototypes for lseek */ +#endif +#include +#include +#include + +#ifndef SEEK_SET +#define SEEK_SET 0 +#endif + +#include "mmprivate.h" + +/* Cache the pagesize for the current host machine. Note that if the host + does not readily provide a getpagesize() function, we need to emulate it + elsewhere, not clutter up this file with lots of kluges to try to figure + it out. */ + +static size_t pagesize; +#if NEED_DECLARATION_GETPAGESIZE +extern int getpagesize PARAMS ((void)); +#endif + +#define PAGE_ALIGN(addr) (caddr_t) (((long)(addr) + pagesize - 1) & \ + ~(pagesize - 1)) + + +/* Return MAP_PRIVATE if MDP represents /dev/zero. Otherwise, return + MAP_SHARED. */ + +#define MAP_PRIVATE_OR_SHARED(MDP) ((MDP -> flags & MMALLOC_DEVZERO) \ + ? MAP_PRIVATE \ + : MAP_SHARED) + + +/* Get core for the memory region specified by MDP, using SIZE as the + amount to either add to or subtract from the existing region. Works + like sbrk(), but using mmap(). */ + +PTR +__mmalloc_mmap_morecore (mdp, size) + struct mdesc *mdp; + int size; +{ + PTR result = NULL; + off_t foffset; /* File offset at which new mapping will start */ + size_t mapbytes; /* Number of bytes to map */ + caddr_t moveto; /* Address where we wish to move "break value" to */ + caddr_t mapto; /* Address we actually mapped to */ + char buf = 0; /* Single byte to write to extend mapped file */ + + if (pagesize == 0) + { + pagesize = getpagesize (); + } + if (size == 0) + { + /* Just return the current "break" value. */ + result = mdp -> breakval; + } + else if (size < 0) + { + /* We are deallocating memory. If the amount requested would cause + us to try to deallocate back past the base of the mmap'd region + then do nothing, and return NULL. Otherwise, deallocate the + memory and return the old break value. */ + if (mdp -> breakval + size >= mdp -> base) + { + result = (PTR) mdp -> breakval; + mdp -> breakval += size; + moveto = PAGE_ALIGN (mdp -> breakval); + munmap (moveto, (size_t) (mdp -> top - moveto)); + mdp -> top = moveto; + } + } + else + { + /* We are allocating memory. Make sure we have an open file + descriptor and then go on to get the memory. */ + if (mdp -> fd < 0) + { + result = NULL; + } + else if (mdp -> breakval + size > mdp -> top) + { + /* The request would move us past the end of the currently + mapped memory, so map in enough more memory to satisfy + the request. This means we also have to grow the mapped-to + file by an appropriate amount, since mmap cannot be used + to extend a file. */ + moveto = PAGE_ALIGN (mdp -> breakval + size); + mapbytes = moveto - mdp -> top; + foffset = mdp -> top - mdp -> base; + /* FIXME: Test results of lseek() and write() */ + lseek (mdp -> fd, foffset + mapbytes - 1, SEEK_SET); + write (mdp -> fd, &buf, 1); + if (mdp -> base == 0) + { + /* Let mmap pick the map start address */ + mapto = mmap (0, mapbytes, PROT_READ | PROT_WRITE, + MAP_PRIVATE_OR_SHARED (mdp), mdp -> fd, foffset); + if (mapto != (caddr_t) -1) + { + mdp -> base = mdp -> breakval = mapto; + mdp -> top = mdp -> base + mapbytes; + result = (PTR) mdp -> breakval; + mdp -> breakval += size; + } + } + else + { + mapto = mmap (mdp -> top, mapbytes, PROT_READ | PROT_WRITE, + MAP_PRIVATE_OR_SHARED (mdp) | MAP_FIXED, mdp -> fd, + foffset); + if (mapto == mdp -> top) + { + mdp -> top = moveto; + result = (PTR) mdp -> breakval; + mdp -> breakval += size; + } + } + } + else + { + result = (PTR) mdp -> breakval; + mdp -> breakval += size; + } + } + return (result); +} + +PTR +__mmalloc_remap_core (mdp) + struct mdesc *mdp; +{ + caddr_t base; + + /* FIXME: Quick hack, needs error checking and other attention. */ + + base = mmap (mdp -> base, mdp -> top - mdp -> base, + PROT_READ | PROT_WRITE, MAP_PRIVATE_OR_SHARED (mdp) | MAP_FIXED, + mdp -> fd, 0); + return ((PTR) base); +} + +PTR +mmalloc_findbase (size) + int size; +{ + int fd; + int flags; + caddr_t base = NULL; + +#ifdef MAP_ANONYMOUS + flags = MAP_PRIVATE | MAP_ANONYMOUS; + fd = -1; +#else +#ifdef MAP_FILE + flags = MAP_PRIVATE | MAP_FILE; +#else + flags = MAP_PRIVATE; +#endif + fd = open ("/dev/zero", O_RDWR); + if (fd != -1) + { + return ((PTR) NULL); + } +#endif + base = mmap (0, size, PROT_READ | PROT_WRITE, flags, fd, 0); + if (base != (caddr_t) -1) + { + munmap (base, (size_t) size); + } + if (fd != -1) + { + close (fd); + } + if (base == 0) + { + /* Don't allow mapping at address zero. We use that value + to signal an error return, and besides, it is useful to + catch NULL pointers if it is unmapped. Instead start + at the next page boundary. */ + base = (caddr_t) getpagesize (); + } + else if (base == (caddr_t) -1) + { + base = NULL; + } + return ((PTR) base); +} + +#else /* defined(HAVE_MMAP) */ +/* Prevent "empty translation unit" warnings from the idiots at X3J11. */ +static char ansi_c_idiots = 69; +#endif /* defined(HAVE_MMAP) */ diff --git a/mmalloc/mmcheck.c b/mmalloc/mmcheck.c new file mode 100644 index 0000000..48936b3 --- /dev/null +++ b/mmalloc/mmcheck.c @@ -0,0 +1,223 @@ +/* Standard debugging hooks for `mmalloc'. + Copyright 1990, 1991, 1992 Free Software Foundation + + Written May 1989 by Mike Haertel. + Heavily modified Mar 1992 by Fred Fish (fnf@cygnus.com) + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. + + The author may be reached (Email) at the address mike@ai.mit.edu, + or (US mail) as Mike Haertel c/o Free Software Foundation. */ + +#include "mmprivate.h" + +/* Default function to call when something awful happens. The application + can specify an alternate function to be called instead (and probably will + want to). */ + +extern void abort PARAMS ((void)); + +/* Arbitrary magical numbers. */ + +#define MAGICWORD (unsigned int) 0xfedabeeb /* Active chunk */ +#define MAGICWORDFREE (unsigned int) 0xdeadbeef /* Inactive chunk */ +#define MAGICBYTE ((char) 0xd7) + +/* Each memory allocation is bounded by a header structure and a trailer + byte. I.E. + + + + The pointer returned to the user points to the first byte in the + user's allocation area. The magic word can be tested to detect + buffer underruns and the magic byte can be tested to detect overruns. */ + +struct hdr + { + size_t size; /* Exact size requested by user. */ + unsigned long int magic; /* Magic number to check header integrity. */ + }; + +static void checkhdr PARAMS ((struct mdesc *, CONST struct hdr *)); +static void mfree_check PARAMS ((PTR, PTR)); +static PTR mmalloc_check PARAMS ((PTR, size_t)); +static PTR mrealloc_check PARAMS ((PTR, PTR, size_t)); + +/* Check the magicword and magicbyte, and if either is corrupted then + call the emergency abort function specified for the heap in use. */ + +static void +checkhdr (mdp, hdr) + struct mdesc *mdp; + CONST struct hdr *hdr; +{ + if (hdr -> magic != MAGICWORD || + ((char *) &hdr[1])[hdr -> size] != MAGICBYTE) + { + (*mdp -> abortfunc)(); + } +} + +static void +mfree_check (md, ptr) + PTR md; + PTR ptr; +{ + struct hdr *hdr = ((struct hdr *) ptr) - 1; + struct mdesc *mdp; + + mdp = MD_TO_MDP (md); + checkhdr (mdp, hdr); + hdr -> magic = MAGICWORDFREE; + mdp -> mfree_hook = NULL; + mfree (md, (PTR)hdr); + mdp -> mfree_hook = mfree_check; +} + +static PTR +mmalloc_check (md, size) + PTR md; + size_t size; +{ + struct hdr *hdr; + struct mdesc *mdp; + size_t nbytes; + + mdp = MD_TO_MDP (md); + mdp -> mmalloc_hook = NULL; + nbytes = sizeof (struct hdr) + size + 1; + hdr = (struct hdr *) mmalloc (md, nbytes); + mdp -> mmalloc_hook = mmalloc_check; + if (hdr != NULL) + { + hdr -> size = size; + hdr -> magic = MAGICWORD; + hdr++; + *((char *) hdr + size) = MAGICBYTE; + } + return ((PTR) hdr); +} + +static PTR +mrealloc_check (md, ptr, size) + PTR md; + PTR ptr; + size_t size; +{ + struct hdr *hdr = ((struct hdr *) ptr) - 1; + struct mdesc *mdp; + size_t nbytes; + + mdp = MD_TO_MDP (md); + checkhdr (mdp, hdr); + mdp -> mfree_hook = NULL; + mdp -> mmalloc_hook = NULL; + mdp -> mrealloc_hook = NULL; + nbytes = sizeof (struct hdr) + size + 1; + hdr = (struct hdr *) mrealloc (md, (PTR) hdr, nbytes); + mdp -> mfree_hook = mfree_check; + mdp -> mmalloc_hook = mmalloc_check; + mdp -> mrealloc_hook = mrealloc_check; + if (hdr != NULL) + { + hdr -> size = size; + hdr++; + *((char *) hdr + size) = MAGICBYTE; + } + return ((PTR) hdr); +} + +/* Turn on default checking for mmalloc/mrealloc/mfree, for the heap specified + by MD. If FUNC is non-NULL, it is a pointer to the function to call + to abort whenever memory corruption is detected. By default, this is the + standard library function abort(). + + Note that we disallow installation of initial checking hooks if mmalloc + has been called at any time for this particular heap, since if any region + that is allocated prior to installation of the hooks is subsequently + reallocated or freed after installation of the hooks, it is guaranteed + to trigger a memory corruption error. We do this by checking the state + of the MMALLOC_INITIALIZED flag. If the FORCE argument is non-zero, this + checking is disabled and it is allowed to install the checking hooks at any + time. This is useful on systems where the C runtime makes one or more + malloc calls before the user code had a chance to call mmcheck or mmcheckf, + but never calls free with these values. Thus if we are certain that only + values obtained from mallocs after an mmcheck/mmcheckf will ever be passed + to free(), we can go ahead and force installation of the useful checking + hooks. + + However, we can call this function at any time after the initial call, + to update the function pointers to the checking routines and to the + user defined corruption handler routine, as long as these function pointers + have been previously extablished by the initial call. Note that we + do this automatically when remapping a previously used heap, to ensure + that the hooks get updated to the correct values, although the corruption + handler pointer gets set back to the default. The application can then + call mmcheck to use a different corruption handler if desired. + + Returns non-zero if checking is successfully enabled, zero otherwise. */ + +int +mmcheckf (md, func, force) + PTR md; + void (*func) PARAMS ((void)); + int force; +{ + struct mdesc *mdp; + int rtnval; + + mdp = MD_TO_MDP (md); + + /* We can safely set or update the abort function at any time, regardless + of whether or not we successfully do anything else. */ + + mdp -> abortfunc = (func != NULL ? func : abort); + + /* If we haven't yet called mmalloc the first time for this heap, or if we + have hooks that were previously installed, then allow the hooks to be + initialized or updated. */ + + if (force || + !(mdp -> flags & MMALLOC_INITIALIZED) || + (mdp -> mfree_hook != NULL)) + { + mdp -> mfree_hook = mfree_check; + mdp -> mmalloc_hook = mmalloc_check; + mdp -> mrealloc_hook = mrealloc_check; + mdp -> flags |= MMALLOC_MMCHECK_USED; + rtnval = 1; + } + else + { + rtnval = 0; + } + + return (rtnval); +} + +/* This routine is for backwards compatibility only, in case there are + still callers to the original mmcheck function. */ + +int +mmcheck (md, func) + PTR md; + void (*func) PARAMS ((void)); +{ + int rtnval; + + rtnval = mmcheckf (md, func, 0); + return (rtnval); +} diff --git a/mmalloc/mmemalign.c b/mmalloc/mmemalign.c new file mode 100644 index 0000000..3ada027 --- /dev/null +++ b/mmalloc/mmemalign.c @@ -0,0 +1,62 @@ +/* Copyright (C) 1991, 1992 Free Software Foundation, Inc. +This file is part of the GNU C Library. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. */ + +#include "mmprivate.h" + +PTR +mmemalign (md, alignment, size) + PTR md; + size_t alignment; + size_t size; +{ + PTR result; + unsigned long int adj; + struct alignlist *l; + struct mdesc *mdp; + + if ((result = mmalloc (md, size + alignment - 1)) != NULL) + { + adj = RESIDUAL (result, alignment); + if (adj != 0) + { + mdp = MD_TO_MDP (md); + for (l = mdp -> aligned_blocks; l != NULL; l = l -> next) + { + if (l -> aligned == NULL) + { + /* This slot is free. Use it. */ + break; + } + } + if (l == NULL) + { + l = (struct alignlist *) mmalloc (md, sizeof (struct alignlist)); + if (l == NULL) + { + mfree (md, result); + return (NULL); + } + l -> next = mdp -> aligned_blocks; + mdp -> aligned_blocks = l; + } + l -> exact = result; + result = l -> aligned = (char *) result + alignment - adj; + } + } + return (result); +} diff --git a/mmalloc/mmprivate.h b/mmalloc/mmprivate.h new file mode 100644 index 0000000..4576262 --- /dev/null +++ b/mmalloc/mmprivate.h @@ -0,0 +1,343 @@ +/* Declarations for `mmalloc' and friends. + Copyright 1990, 1991, 1992 Free Software Foundation + + Written May 1989 by Mike Haertel. + Heavily modified Mar 1992 by Fred Fish. (fnf@cygnus.com) + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. + + The author may be reached (Email) at the address mike@ai.mit.edu, + or (US mail) as Mike Haertel c/o Free Software Foundation. */ + + +#ifndef __MMPRIVATE_H +#define __MMPRIVATE_H 1 + +#include "mmalloc.h" + +#ifdef HAVE_LIMITS_H +# include +#else +# ifndef CHAR_BIT +# define CHAR_BIT 8 +# endif +#endif + +#ifndef MIN +# define MIN(A, B) ((A) < (B) ? (A) : (B)) +#endif + +#define MMALLOC_MAGIC "mmalloc" /* Mapped file magic number */ +#define MMALLOC_MAGIC_SIZE 8 /* Size of magic number buf */ +#define MMALLOC_VERSION 1 /* Current mmalloc version */ +#define MMALLOC_KEYS 16 /* Keys for application use */ + +/* The allocator divides the heap into blocks of fixed size; large + requests receive one or more whole blocks, and small requests + receive a fragment of a block. Fragment sizes are powers of two, + and all fragments of a block are the same size. When all the + fragments in a block have been freed, the block itself is freed. */ + +#define INT_BIT (CHAR_BIT * sizeof(int)) +#define BLOCKLOG (INT_BIT > 16 ? 12 : 9) +#define BLOCKSIZE ((unsigned int) 1 << BLOCKLOG) +#define BLOCKIFY(SIZE) (((SIZE) + BLOCKSIZE - 1) / BLOCKSIZE) + +/* The difference between two pointers is a signed int. On machines where + the data addresses have the high bit set, we need to ensure that the + difference becomes an unsigned int when we are using the address as an + integral value. In addition, when using with the '%' operator, the + sign of the result is machine dependent for negative values, so force + it to be treated as an unsigned int. */ + +#define ADDR2UINT(addr) ((unsigned int) ((char *) (addr) - (char *) NULL)) +#define RESIDUAL(addr,bsize) ((unsigned int) (ADDR2UINT (addr) % (bsize))) + +/* Determine the amount of memory spanned by the initial heap table + (not an absolute limit). */ + +#define HEAP (INT_BIT > 16 ? 4194304 : 65536) + +/* Number of contiguous free blocks allowed to build up at the end of + memory before they will be returned to the system. */ + +#define FINAL_FREE_BLOCKS 8 + +/* Where to start searching the free list when looking for new memory. + The two possible values are 0 and heapindex. Starting at 0 seems + to reduce total memory usage, while starting at heapindex seems to + run faster. */ + +#define MALLOC_SEARCH_START mdp -> heapindex + +/* Address to block number and vice versa. */ + +#define BLOCK(A) (((char *) (A) - mdp -> heapbase) / BLOCKSIZE + 1) + +#define ADDRESS(B) ((PTR) (((B) - 1) * BLOCKSIZE + mdp -> heapbase)) + +/* Data structure giving per-block information. */ + +typedef union + { + /* Heap information for a busy block. */ + struct + { + /* Zero for a large block, or positive giving the + logarithm to the base two of the fragment size. */ + int type; + union + { + struct + { + size_t nfree; /* Free fragments in a fragmented block. */ + size_t first; /* First free fragment of the block. */ + } frag; + /* Size (in blocks) of a large cluster. */ + size_t size; + } info; + } busy; + /* Heap information for a free block (that may be the first of + a free cluster). */ + struct + { + size_t size; /* Size (in blocks) of a free cluster. */ + size_t next; /* Index of next free cluster. */ + size_t prev; /* Index of previous free cluster. */ + } free; + } malloc_info; + +/* List of blocks allocated with `mmemalign' (or `mvalloc'). */ + +struct alignlist + { + struct alignlist *next; + PTR aligned; /* The address that mmemaligned returned. */ + PTR exact; /* The address that malloc returned. */ + }; + +/* Doubly linked lists of free fragments. */ + +struct list + { + struct list *next; + struct list *prev; + }; + +/* Statistics available to the user. + FIXME: By design, the internals of the malloc package are no longer + exported to the user via an include file, so access to this data needs + to be via some other mechanism, such as mmstat_ where the + return value is the the user is interested in. */ + +struct mstats + { + size_t bytes_total; /* Total size of the heap. */ + size_t chunks_used; /* Chunks allocated by the user. */ + size_t bytes_used; /* Byte total of user-allocated chunks. */ + size_t chunks_free; /* Chunks in the free list. */ + size_t bytes_free; /* Byte total of chunks in the free list. */ + }; + +/* Internal structure that defines the format of the malloc-descriptor. + This gets written to the base address of the region that mmalloc is + managing, and thus also becomes the file header for the mapped file, + if such a file exists. */ + +struct mdesc +{ + /* The "magic number" for an mmalloc file. */ + + char magic[MMALLOC_MAGIC_SIZE]; + + /* The size in bytes of this structure, used as a sanity check when reusing + a previously created mapped file. */ + + unsigned int headersize; + + /* The version number of the mmalloc package that created this file. */ + + unsigned char version; + + /* Some flag bits to keep track of various internal things. */ + + unsigned int flags; + + /* If a system call made by the mmalloc package fails, the errno is + preserved for future examination. */ + + int saved_errno; + + /* Pointer to the function that is used to get more core, or return core + to the system, for requests using this malloc descriptor. For memory + mapped regions, this is the mmap() based routine. There may also be + a single malloc descriptor that points to an sbrk() based routine + for systems without mmap() or for applications that call the mmalloc() + package with a NULL malloc descriptor. + + FIXME: For mapped regions shared by more than one process, this + needs to be maintained on a per-process basis. */ + + PTR (*morecore) PARAMS ((struct mdesc *, int)); + + /* Pointer to the function that causes an abort when the memory checking + features are activated. By default this is set to abort(), but can + be set to another function by the application using mmalloc(). + + FIXME: For mapped regions shared by more than one process, this + needs to be maintained on a per-process basis. */ + + void (*abortfunc) PARAMS ((void)); + + /* Debugging hook for free. + + FIXME: For mapped regions shared by more than one process, this + needs to be maintained on a per-process basis. */ + + void (*mfree_hook) PARAMS ((PTR, PTR)); + + /* Debugging hook for `malloc'. + + FIXME: For mapped regions shared by more than one process, this + needs to be maintained on a per-process basis. */ + + PTR (*mmalloc_hook) PARAMS ((PTR, size_t)); + + /* Debugging hook for realloc. + + FIXME: For mapped regions shared by more than one process, this + needs to be maintained on a per-process basis. */ + + PTR (*mrealloc_hook) PARAMS ((PTR, PTR, size_t)); + + /* Number of info entries. */ + + size_t heapsize; + + /* Pointer to first block of the heap (base of the first block). */ + + char *heapbase; + + /* Current search index for the heap table. */ + /* Search index in the info table. */ + + size_t heapindex; + + /* Limit of valid info table indices. */ + + size_t heaplimit; + + /* Block information table. + Allocated with malign/__mmalloc_free (not mmalloc/mfree). */ + /* Table indexed by block number giving per-block information. */ + + malloc_info *heapinfo; + + /* Instrumentation. */ + + struct mstats heapstats; + + /* Free list headers for each fragment size. */ + /* Free lists for each fragment size. */ + + struct list fraghead[BLOCKLOG]; + + /* List of blocks allocated by memalign. */ + + struct alignlist *aligned_blocks; + + /* The base address of the memory region for this malloc heap. This + is the location where the bookkeeping data for mmap and for malloc + begins. */ + + char *base; + + /* The current location in the memory region for this malloc heap which + represents the end of memory in use. */ + + char *breakval; + + /* The end of the current memory region for this malloc heap. This is + the first location past the end of mapped memory. */ + + char *top; + + /* Open file descriptor for the file to which this malloc heap is mapped. + This will always be a valid file descriptor, since /dev/zero is used + by default if no open file is supplied by the client. Also note that + it may change each time the region is mapped and unmapped. */ + + int fd; + + /* An array of keys to data within the mapped region, for use by the + application. */ + + PTR keys[MMALLOC_KEYS]; + +}; + +/* Bits to look at in the malloc descriptor flags word */ + +#define MMALLOC_DEVZERO (1 << 0) /* Have mapped to /dev/zero */ +#define MMALLOC_INITIALIZED (1 << 1) /* Initialized mmalloc */ +#define MMALLOC_MMCHECK_USED (1 << 2) /* mmcheckf() called already */ + +/* Internal version of `mfree' used in `morecore'. */ + +extern void __mmalloc_free PARAMS ((struct mdesc *, PTR)); + +/* Hooks for debugging versions. */ + +extern void (*__mfree_hook) PARAMS ((PTR, PTR)); +extern PTR (*__mmalloc_hook) PARAMS ((PTR, size_t)); +extern PTR (*__mrealloc_hook) PARAMS ((PTR, PTR, size_t)); + +/* A default malloc descriptor for the single sbrk() managed region. */ + +extern struct mdesc *__mmalloc_default_mdp; + +/* Initialize the first use of the default malloc descriptor, which uses + an sbrk() region. */ + +extern struct mdesc *__mmalloc_sbrk_init PARAMS ((void)); + +/* Grow or shrink a contiguous mapped region using mmap(). + Works much like sbrk() */ + +#if defined(HAVE_MMAP) + +extern PTR __mmalloc_mmap_morecore PARAMS ((struct mdesc *, int)); + +#endif + +/* Remap a mmalloc region that was previously mapped. */ + +extern PTR __mmalloc_remap_core PARAMS ((struct mdesc *)); + +/* Macro to convert from a user supplied malloc descriptor to pointer to the + internal malloc descriptor. If the user supplied descriptor is NULL, then + use the default internal version, initializing it if necessary. Otherwise + just cast the user supplied version (which is void *) to the proper type + (struct mdesc *). */ + +#define MD_TO_MDP(md) \ + ((md) == NULL \ + ? (__mmalloc_default_mdp == NULL \ + ? __mmalloc_sbrk_init () \ + : __mmalloc_default_mdp) \ + : (struct mdesc *) (md)) + +#endif /* __MMPRIVATE_H */ diff --git a/mmalloc/mmstats.c b/mmalloc/mmstats.c new file mode 100644 index 0000000..ed17323 --- /dev/null +++ b/mmalloc/mmstats.c @@ -0,0 +1,46 @@ +/* Access the statistics maintained by `mmalloc'. + Copyright 1990, 1991, 1992 Free Software Foundation + + Written May 1989 by Mike Haertel. + Modified Mar 1992 by Fred Fish. (fnf@cygnus.com) + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. + + The author may be reached (Email) at the address mike@ai.mit.edu, + or (US mail) as Mike Haertel c/o Free Software Foundation. */ + +#include "mmprivate.h" + +/* FIXME: See the comment in mmprivate.h where struct mstats is defined. + None of the internal mmalloc structures should be externally visible + outside the library. */ + +struct mstats +mmstats (md) + PTR md; +{ + struct mstats result; + struct mdesc *mdp; + + mdp = MD_TO_MDP (md); + result.bytes_total = + (char *) mdp -> morecore (mdp, 0) - mdp -> heapbase; + result.chunks_used = mdp -> heapstats.chunks_used; + result.bytes_used = mdp -> heapstats.bytes_used; + result.chunks_free = mdp -> heapstats.chunks_free; + result.bytes_free = mdp -> heapstats.bytes_free; + return (result); +} diff --git a/mmalloc/mmtrace.awk b/mmalloc/mmtrace.awk new file mode 100644 index 0000000..d7689ce --- /dev/null +++ b/mmalloc/mmtrace.awk @@ -0,0 +1,36 @@ +# +# Awk program to analyze mtrace.c output. +# +$1 == "+" { if (allocated[$2] != "") + print "+", $2, "Alloc", NR, "duplicate:", allocated[$2]; + else + allocated[$2] = $3; + } +$1 == "-" { if (allocated[$2] != "") { + allocated[$2] = ""; + if (allocated[$2] != "") + print "DELETE FAILED", $2, allocated[$2]; + } else + print "-", $2, "Free", NR, "was never alloc'd"; + } +$1 == "<" { if (allocated[$2] != "") + allocated[$2] = ""; + else + print "-", $2, "Realloc", NR, "was never alloc'd"; + } +$1 == ">" { if (allocated[$2] != "") + print "+", $2, "Realloc", NR, "duplicate:", allocated[$2]; + else + allocated[$2] = $3; + } + +# Ignore "= Start" +$1 == "=" { } +# Ignore failed realloc attempts for now +$1 == "!" { } + + +END { for (x in allocated) + if (allocated[x] != "") + print "+", x, allocated[x]; + } diff --git a/mmalloc/mmtrace.c b/mmalloc/mmtrace.c new file mode 100644 index 0000000..563c860 --- /dev/null +++ b/mmalloc/mmtrace.c @@ -0,0 +1,171 @@ +/* More debugging hooks for `mmalloc'. + Copyright 1991, 1992, 1994 Free Software Foundation + + Written April 2, 1991 by John Gilmore of Cygnus Support + Based on mcheck.c by Mike Haertel. + Modified Mar 1992 by Fred Fish. (fnf@cygnus.com) + +This file is part of the GNU C Library. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. */ + +#include +#include "mmprivate.h" + +static void tr_break PARAMS ((void)); +static void tr_freehook PARAMS ((PTR, PTR)); +static PTR tr_mallochook PARAMS ((PTR, size_t)); +static PTR tr_reallochook PARAMS ((PTR, PTR, size_t)); + +#ifndef __GNU_LIBRARY__ +extern char *getenv (); +#endif + +static FILE *mallstream; + +#if 0 /* FIXME: Disabled for now. */ +static char mallenv[] = "MALLOC_TRACE"; +static char mallbuf[BUFSIZ]; /* Buffer for the output. */ +#endif + +/* Address to breakpoint on accesses to... */ +static PTR mallwatch; + +/* Old hook values. */ + +static void (*old_mfree_hook) PARAMS ((PTR, PTR)); +static PTR (*old_mmalloc_hook) PARAMS ((PTR, size_t)); +static PTR (*old_mrealloc_hook) PARAMS ((PTR, PTR, size_t)); + +/* This function is called when the block being alloc'd, realloc'd, or + freed has an address matching the variable "mallwatch". In a debugger, + set "mallwatch" to the address of interest, then put a breakpoint on + tr_break. */ + +static void +tr_break () +{ +} + +static void +tr_freehook (md, ptr) + PTR md; + PTR ptr; +{ + struct mdesc *mdp; + + mdp = MD_TO_MDP (md); + /* Be sure to print it first. */ + fprintf (mallstream, "- %08lx\n", (unsigned long) ptr); + if (ptr == mallwatch) + tr_break (); + mdp -> mfree_hook = old_mfree_hook; + mfree (md, ptr); + mdp -> mfree_hook = tr_freehook; +} + +static PTR +tr_mallochook (md, size) + PTR md; + size_t size; +{ + PTR hdr; + struct mdesc *mdp; + + mdp = MD_TO_MDP (md); + mdp -> mmalloc_hook = old_mmalloc_hook; + hdr = (PTR) mmalloc (md, size); + mdp -> mmalloc_hook = tr_mallochook; + + /* We could be printing a NULL here; that's OK. */ + fprintf (mallstream, "+ %08lx %x\n", (unsigned long) hdr, size); + + if (hdr == mallwatch) + tr_break (); + + return (hdr); +} + +static PTR +tr_reallochook (md, ptr, size) + PTR md; + PTR ptr; + size_t size; +{ + PTR hdr; + struct mdesc *mdp; + + mdp = MD_TO_MDP (md); + + if (ptr == mallwatch) + tr_break (); + + mdp -> mfree_hook = old_mfree_hook; + mdp -> mmalloc_hook = old_mmalloc_hook; + mdp -> mrealloc_hook = old_mrealloc_hook; + hdr = (PTR) mrealloc (md, ptr, size); + mdp -> mfree_hook = tr_freehook; + mdp -> mmalloc_hook = tr_mallochook; + mdp -> mrealloc_hook = tr_reallochook; + if (hdr == NULL) + /* Failed realloc. */ + fprintf (mallstream, "! %08lx %x\n", (unsigned long) ptr, size); + else + fprintf (mallstream, "< %08lx\n> %08lx %x\n", (unsigned long) ptr, + (unsigned long) hdr, size); + + if (hdr == mallwatch) + tr_break (); + + return hdr; +} + +/* We enable tracing if either the environment variable MALLOC_TRACE + is set, or if the variable mallwatch has been patched to an address + that the debugging user wants us to stop on. When patching mallwatch, + don't forget to set a breakpoint on tr_break! */ + +int +mmtrace () +{ +#if 0 /* FIXME! This is disabled for now until we figure out how to + maintain a stack of hooks per heap, since we might have other + hooks (such as set by mmcheck/mmcheckf) active also. */ + char *mallfile; + + mallfile = getenv (mallenv); + if (mallfile != NULL || mallwatch != NULL) + { + mallstream = fopen (mallfile != NULL ? mallfile : "/dev/null", "w"); + if (mallstream != NULL) + { + /* Be sure it doesn't mmalloc its buffer! */ + setbuf (mallstream, mallbuf); + fprintf (mallstream, "= Start\n"); + old_mfree_hook = mdp -> mfree_hook; + mdp -> mfree_hook = tr_freehook; + old_mmalloc_hook = mdp -> mmalloc_hook; + mdp -> mmalloc_hook = tr_mallochook; + old_mrealloc_hook = mdp -> mrealloc_hook; + mdp -> mrealloc_hook = tr_reallochook; + } + } + +#endif /* 0 */ + + return (1); +} + diff --git a/mmalloc/mrealloc.c b/mmalloc/mrealloc.c new file mode 100644 index 0000000..e2004aa --- /dev/null +++ b/mmalloc/mrealloc.c @@ -0,0 +1,163 @@ +/* Change the size of a block allocated by `mmalloc'. + Copyright 1990, 1991 Free Software Foundation + Written May 1989 by Mike Haertel. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. + + The author may be reached (Email) at the address mike@ai.mit.edu, + or (US mail) as Mike Haertel c/o Free Software Foundation. */ + +#include /* Prototypes for memcpy, memmove, memset, etc */ + +#include "mmprivate.h" + +/* Resize the given region to the new size, returning a pointer + to the (possibly moved) region. This is optimized for speed; + some benchmarks seem to indicate that greater compactness is + achieved by unconditionally allocating and copying to a + new region. This module has incestuous knowledge of the + internals of both mfree and mmalloc. */ + +PTR +mrealloc (md, ptr, size) + PTR md; + PTR ptr; + size_t size; +{ + struct mdesc *mdp; + PTR result; + int type; + size_t block, blocks, oldlimit; + + if (size == 0) + { + mfree (md, ptr); + return (mmalloc (md, 0)); + } + else if (ptr == NULL) + { + return (mmalloc (md, size)); + } + + mdp = MD_TO_MDP (md); + + if (mdp -> mrealloc_hook != NULL) + { + return ((*mdp -> mrealloc_hook) (md, ptr, size)); + } + + block = BLOCK (ptr); + + type = mdp -> heapinfo[block].busy.type; + switch (type) + { + case 0: + /* Maybe reallocate a large block to a small fragment. */ + if (size <= BLOCKSIZE / 2) + { + result = mmalloc (md, size); + if (result != NULL) + { + memcpy (result, ptr, size); + mfree (md, ptr); + return (result); + } + } + + /* The new size is a large allocation as well; + see if we can hold it in place. */ + blocks = BLOCKIFY (size); + if (blocks < mdp -> heapinfo[block].busy.info.size) + { + /* The new size is smaller; return excess memory to the free list. */ + mdp -> heapinfo[block + blocks].busy.type = 0; + mdp -> heapinfo[block + blocks].busy.info.size + = mdp -> heapinfo[block].busy.info.size - blocks; + mdp -> heapinfo[block].busy.info.size = blocks; + mfree (md, ADDRESS (block + blocks)); + result = ptr; + } + else if (blocks == mdp -> heapinfo[block].busy.info.size) + { + /* No size change necessary. */ + result = ptr; + } + else + { + /* Won't fit, so allocate a new region that will. + Free the old region first in case there is sufficient + adjacent free space to grow without moving. */ + blocks = mdp -> heapinfo[block].busy.info.size; + /* Prevent free from actually returning memory to the system. */ + oldlimit = mdp -> heaplimit; + mdp -> heaplimit = 0; + mfree (md, ptr); + mdp -> heaplimit = oldlimit; + result = mmalloc (md, size); + if (result == NULL) + { + mmalloc (md, blocks * BLOCKSIZE); + return (NULL); + } + if (ptr != result) + { + memmove (result, ptr, blocks * BLOCKSIZE); + } + } + break; + + default: + /* Old size is a fragment; type is logarithm + to base two of the fragment size. */ + if (size > (size_t) (1 << (type - 1)) && size <= (size_t) (1 << type)) + { + /* The new size is the same kind of fragment. */ + result = ptr; + } + else + { + /* The new size is different; allocate a new space, + and copy the lesser of the new size and the old. */ + result = mmalloc (md, size); + if (result == NULL) + { + return (NULL); + } + memcpy (result, ptr, MIN (size, (size_t) 1 << type)); + mfree (md, ptr); + } + break; + } + + return (result); +} + +/* When using this package, provide a version of malloc/realloc/free built + on top of it, so that if we use the default sbrk() region we will not + collide with another malloc package trying to do the same thing, if + the application contains any "hidden" calls to malloc/realloc/free (such + as inside a system library). */ + +PTR +realloc (ptr, size) + PTR ptr; + size_t size; +{ + PTR result; + + result = mrealloc ((PTR) NULL, ptr, size); + return (result); +} diff --git a/mmalloc/mvalloc.c b/mmalloc/mvalloc.c new file mode 100644 index 0000000..e44942f --- /dev/null +++ b/mmalloc/mvalloc.c @@ -0,0 +1,50 @@ +/* Allocate memory on a page boundary. + Copyright (C) 1991 Free Software Foundation, Inc. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. */ + +#include "mmprivate.h" + +/* Cache the pagesize for the current host machine. Note that if the host + does not readily provide a getpagesize() function, we need to emulate it + elsewhere, not clutter up this file with lots of kluges to try to figure + it out. */ + +static size_t cache_pagesize; +#if NEED_DECLARATION_GETPAGESIZE +extern int getpagesize PARAMS ((void)); +#endif + +PTR +mvalloc (md, size) + PTR md; + size_t size; +{ + if (cache_pagesize == 0) + { + cache_pagesize = getpagesize (); + } + + return (mmemalign (md, cache_pagesize, size)); +} + + +PTR +valloc (size) + size_t size; +{ + return mvalloc ((PTR) NULL, size); +} diff --git a/mmalloc/sbrk-sup.c b/mmalloc/sbrk-sup.c new file mode 100644 index 0000000..93c078b --- /dev/null +++ b/mmalloc/sbrk-sup.c @@ -0,0 +1,102 @@ +/* Support for sbrk() regions. + Copyright 1992, 2000 Free Software Foundation, Inc. + Contributed by Fred Fish at Cygnus Support. fnf@cygnus.com + +This file is part of the GNU C Library. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. */ + +#ifdef HAVE_UNISTD_H +#include /* Prototypes for sbrk (maybe) */ +#endif +#include /* Prototypes for memcpy, memmove, memset, etc */ + +#include "mmprivate.h" + +static PTR sbrk_morecore PARAMS ((struct mdesc *, int)); +#if NEED_DECLARATION_SBRK +extern PTR sbrk PARAMS ((int)); +#endif + +/* The mmalloc() package can use a single implicit malloc descriptor + for mmalloc/mrealloc/mfree operations which do not supply an explicit + descriptor. For these operations, sbrk() is used to obtain more core + from the system, or return core. This allows mmalloc() to provide + backwards compatibility with the non-mmap'd version. */ + +struct mdesc *__mmalloc_default_mdp; + +/* Use sbrk() to get more core. */ + +static PTR +sbrk_morecore (mdp, size) + struct mdesc *mdp; + int size; +{ + PTR result; + + if ((result = sbrk (size)) == (PTR) -1) + { + result = NULL; + } + else + { + mdp -> breakval += size; + mdp -> top += size; + } + return (result); +} + +/* Initialize the default malloc descriptor if this is the first time + a request has been made to use the default sbrk'd region. + + Since no alignment guarantees are made about the initial value returned + by sbrk, test the initial value and (if necessary) sbrk enough additional + memory to start off with alignment to BLOCKSIZE. We actually only need + it aligned to an alignment suitable for any object, so this is overkill. + But at most it wastes just part of one BLOCKSIZE chunk of memory and + minimizes portability problems by avoiding us having to figure out + what the actual minimal alignment is. The rest of the malloc code + avoids this as well, by always aligning to the minimum of the requested + size rounded up to a power of two, or to BLOCKSIZE. + + Note that we are going to use some memory starting at this initial sbrk + address for the sbrk region malloc descriptor, which is a struct, so the + base address must be suitably aligned. */ + +struct mdesc * +__mmalloc_sbrk_init () +{ + PTR base; + unsigned int adj; + + base = sbrk (0); + adj = RESIDUAL (base, BLOCKSIZE); + if (adj != 0) + { + sbrk (BLOCKSIZE - adj); + base = sbrk (0); + } + __mmalloc_default_mdp = (struct mdesc *) sbrk (sizeof (struct mdesc)); + memset ((char *) __mmalloc_default_mdp, 0, sizeof (struct mdesc)); + __mmalloc_default_mdp -> morecore = sbrk_morecore; + __mmalloc_default_mdp -> base = base; + __mmalloc_default_mdp -> breakval = __mmalloc_default_mdp -> top = sbrk (0); + __mmalloc_default_mdp -> fd = -1; + return (__mmalloc_default_mdp); +} + +