--- /dev/null
+(* Memory info command for virtual domains.
+ (C) Copyright 2008 Richard W.M. Jones, Red Hat Inc.
+ http://libvirt.org/
+
+ 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *)
+
+open ExtList
+open ExtString
+
+open Printf
+
+let (//) = Filename.concat
+
+type pathname = string
+
+type info = {
+ kernel_version : string;
+ arch : string;
+ basename : string;
+}
+
+type structure = {
+ struct_name : string;
+ struct_total_size : int;
+ struct_fields : field list;
+}
+
+and field = {
+ field_name : string;
+ field_type : f_type;
+ field_offset : int;
+ field_size : int;
+}
+
+and f_type =
+ | FStructPointer of string
+ | FVoidPointer
+ | FListHeadPointer
+ | FInteger
+ | FString of int
+
+let string_of_info i =
+ sprintf "%s: %s %s" i.basename i.kernel_version i.arch
+
+let rec string_of_structure s =
+ let fields = List.map string_of_field s.struct_fields in
+ let fields = String.concat "\n " fields in
+ sprintf "struct %s {\n %s\n}; /* total size = %d bytes */"
+ s.struct_name fields s.struct_total_size
+
+and string_of_field f =
+ sprintf "%s %s; /* offset = %d, size = %d */"
+ f.field_name (string_of_f_type f.field_type)
+ f.field_offset f.field_size
+
+and string_of_f_type = function
+ | FStructPointer struct_name -> sprintf "struct %s*" struct_name
+ | FVoidPointer -> "void *"
+ | FListHeadPointer -> "struct list_head *"
+ | FInteger -> "int"
+ | FString width -> sprintf "char[%d]" width
+
+(* Regular expressions. We really really should use ocaml-mikmatch ... *)
+let re_oldformat = Pcre.regexp "^RPM: \\d+: \\(build \\d+\\) ([-\\w]+) ([\\w.]+) ([\\w.]+) \\(.*?\\) (\\w+)"
+let re_keyvalue = Pcre.regexp "^(\\w+): (.*)"
+
+let list_kernels path =
+ (* Get the *.info files from the kernels database. *)
+ let infos = Sys.readdir path in
+ let infos = Array.to_list infos in
+ let infos = List.filter (fun name -> String.ends_with name ".info") infos in
+ let infos = List.map ( (//) path) infos in
+
+ (* Parse in the *.info files. These have historically had a few different
+ * formats that we need to support.
+ *)
+ let infos = List.map (
+ fun filename ->
+ (* Get the basename (for getting the .data file later on). *)
+ let basename = Filename.chop_suffix filename ".info" in
+
+ let chan = open_in filename in
+ let line = input_line chan in
+
+ (* Kernel version string. *)
+ let version, arch =
+ if Pcre.pmatch ~rex:re_oldformat line then (
+ (* If the file starts with "RPM: \d+: ..." then it's the
+ * original Fedora format. Everything in one line.
+ *)
+ let subs = Pcre.exec ~rex:re_oldformat line in
+ (* let name = Pcre.get_substring subs 1 in *)
+ let version = Pcre.get_substring subs 2 in
+ let release = Pcre.get_substring subs 3 in
+ let arch = Pcre.get_substring subs 4 in
+ close_in chan;
+ (* XXX Map name -> PAE, hugemem etc. *)
+ (* name, *) sprintf "%s-%s.%s" version release arch, arch
+ ) else (
+ (* New-style "key: value" entries, up to end of file or the first
+ * blank line.
+ *)
+ let (*name,*) version, release, arch =
+ (*ref "",*) ref "", ref "", ref "" in
+ let rec loop line =
+ try
+ let subs = Pcre.exec ~rex:re_keyvalue line in
+ let key = Pcre.get_substring subs 1 in
+ let value = Pcre.get_substring subs 2 in
+ (*if key = "Name" then name := value
+ else*) if key = "Version" then version := value
+ else if key = "Release" then release := value
+ else if key = "Architecture" then arch := value;
+ let line = input_line chan in
+ loop line
+ with
+ Not_found | End_of_file ->
+ close_in chan
+ in
+ loop line;
+ let (*name,*) version, release, arch =
+ (*!name,*) !version, !release, !arch in
+ if (*name = "" ||*) version = "" || release = "" || arch = "" then
+ failwith (sprintf "%s: missing Name, Version, Release or Architecture key" filename);
+ (* XXX Map name -> PAE, hugemem etc. *)
+ (* name, *) sprintf "%s-%s.%s" version release arch, arch
+ ) in
+
+ (*printf "%s -> %s %s\n%!" basename version arch;*)
+
+ { basename = basename; arch = arch;
+ kernel_version = version }
+ ) infos in
+ infos
+
+(* XXX This would be better as a proper lex/yacc parser.
+ * XXX Even better would be to have a proper interface to libdwarves.
+ *)
+let re_offsetsize = Pcre.regexp "/\\*\\s+(\\d+)\\s+(\\d+)\\s+\\*/"
+let re_intfield = Pcre.regexp "(?:int|char)\\s+(\\w+);"
+let re_ptrfield = Pcre.regexp "struct\\s+(\\w+)\\s*\\*\\s*(\\w+);"
+let re_voidptrfield = Pcre.regexp "void\\s*\\*\\s*(\\w+);"
+let re_strfield = Pcre.regexp "char\\s+(\\w+)\\[(\\d+)\\];"
+let re_structopener = Pcre.regexp "(struct|union)\\s+.*{$"
+let re_structcloser = Pcre.regexp "}\\s*(\\w+)?(\\[\\d+\\])?;"
+
+let load_structures { basename = basename } struct_names =
+ (* For quick access to the opener strings, build a hash. *)
+ let openers = Hashtbl.create 13 in
+ List.iter (
+ fun struct_name ->
+ let opener = sprintf "struct %s {" struct_name in
+ let closer = "};" in
+ Hashtbl.add openers opener (closer, struct_name)
+ ) struct_names;
+
+ (* Now read the data file and parse out the structures of interest. *)
+ let file_exists name =
+ try Unix.access name [Unix.F_OK]; true
+ with Unix.Unix_error _ -> false
+ in
+ let close_process_in cmd chan =
+ match Unix.close_process_in chan with
+ | Unix.WEXITED 0 -> ()
+ | Unix.WEXITED i ->
+ eprintf "%s: command exited with code %d\n" cmd i; exit i
+ | Unix.WSIGNALED i ->
+ eprintf "%s: command exited with signal %d\n" cmd i; exit 1
+ | Unix.WSTOPPED i ->
+ eprintf "%s: command stopped by signal %d\n" cmd i; exit 1
+ in
+
+ (* Open the data file, uncompressing it on the fly if necessary. *)
+ let chan, close =
+ if file_exists (basename ^ ".data") then
+ open_in (basename ^ ".data"), close_in
+ else if file_exists (basename ^ ".data.gz") then (
+ let cmd =
+ sprintf "gzip -cd %s" (Filename.quote (basename ^ ".data.gz")) in
+ Unix.open_process_in cmd, close_process_in cmd
+ )
+ else if file_exists (basename ^ ".data.bz2") then (
+ let cmd =
+ sprintf "bzip2 -cd %s" (Filename.quote (basename ^ ".data.bz2")) in
+ Unix.open_process_in cmd, close_process_in cmd
+ ) else
+ failwith (sprintf "%s: cannot find corresponding data file" basename) in
+
+ (* Read the data file in, looking for structures of interest to us. *)
+ let bodies = Hashtbl.create 13 in
+ let rec loop () =
+ let line = input_line chan in
+
+ (* If the line is an opener for one of the structures we
+ * are looking for, then for now just save all the text until
+ * we get to the closer line.
+ *)
+ (try
+ let closer, struct_name = Hashtbl.find openers line in
+ let rec loop2 lines =
+ let line = input_line chan in
+ let lines = line :: lines in
+ if String.starts_with line closer then List.rev lines
+ else loop2 lines
+ in
+
+ let body =
+ try loop2 [line]
+ with End_of_file ->
+ failwith (sprintf "%s: %s: %S not matched by closing %S" basename struct_name line closer) in
+
+ Hashtbl.replace bodies struct_name body
+ with Not_found -> ());
+
+ loop ()
+ in
+ (try loop () with End_of_file -> ());
+
+ close chan;
+
+ (* Now parse each structure body. *)
+
+ (* 'basename' is the source file, and second parameter ('body') is
+ * the list of text lines which covers this structure (minus the
+ * opener line). Result is the list of parsed fields from this
+ * structure.
+ *)
+ let rec parse basename = function
+ | [] -> assert false
+ | [_] -> [] (* Just the closer line, finished. *)
+ | line :: lines when Pcre.pmatch ~rex:re_structopener line ->
+ (* Recursively parse a sub-structure. First search for the
+ * corresponding closer line.
+ *)
+ let rec loop depth acc = function
+ | [] ->
+ eprintf "%s: %S has no matching close structure line\n%!"
+ basename line;
+ assert false
+ | line :: lines when Pcre.pmatch ~rex:re_structopener line ->
+ loop (depth+1) (line :: acc) lines
+ | line :: lines
+ when depth = 0 && Pcre.pmatch ~rex:re_structcloser line ->
+ (line :: acc), lines
+ | line :: lines
+ when depth > 0 && Pcre.pmatch ~rex:re_structcloser line ->
+ loop (depth-1) (line :: acc) lines
+ | line :: lines -> loop depth (line :: acc) lines
+ in
+ let nested_body, rest = loop 0 [] lines in
+
+ (* Then parse the sub-structure. *)
+ let struct_name, nested_body =
+ match nested_body with
+ | [] -> assert false
+ | closer :: _ ->
+ let subs = Pcre.exec ~rex:re_structcloser closer in
+ let struct_name =
+ try Some (Pcre.get_substring subs 1) with Not_found -> None in
+ struct_name, List.rev nested_body in
+ let nested_fields = parse basename nested_body in
+
+ (* Prefix the sub-fields with the name of the structure. *)
+ let nested_fields =
+ match struct_name with
+ | None -> nested_fields
+ | Some prefix ->
+ List.map (
+ fun ({ field_name = name } as field) ->
+ let name = prefix ^ "'" ^ name in
+ { field with field_name = name }
+ ) nested_fields in
+
+ (* Parse the rest. *)
+ nested_fields @ parse basename rest
+
+ | line :: lines when Pcre.pmatch ~rex:re_intfield line ->
+ (* An int field. *)
+ let subs = Pcre.exec ~rex:re_intfield line in
+ let name = Pcre.get_substring subs 1 in
+ (try
+ let subs = Pcre.exec ~rex:re_offsetsize line in
+ let offset = int_of_string (Pcre.get_substring subs 1) in
+ let size = int_of_string (Pcre.get_substring subs 2) in
+ let field =
+ { field_name = name; field_type = FInteger;
+ field_offset = offset; field_size = size } in
+ field :: parse basename lines
+ with
+ Not_found -> parse basename lines
+ );
+
+ | line :: lines when Pcre.pmatch ~rex:re_ptrfield line ->
+ (* A pointer-to-struct field. *)
+ let subs = Pcre.exec ~rex:re_ptrfield line in
+ let struct_name = Pcre.get_substring subs 1 in
+ let name = Pcre.get_substring subs 2 in
+ (try
+ let subs = Pcre.exec ~rex:re_offsetsize line in
+ let offset = int_of_string (Pcre.get_substring subs 1) in
+ let size = int_of_string (Pcre.get_substring subs 2) in
+ let field_type =
+ if struct_name <> "list_head" then
+ FStructPointer struct_name
+ else
+ FListHeadPointer in
+ let field =
+ { field_name = name; field_type = field_type;
+ field_offset = offset; field_size = size } in
+ field :: parse basename lines
+ with
+ Not_found -> parse basename lines
+ );
+
+ | line :: lines when Pcre.pmatch ~rex:re_voidptrfield line ->
+ (* A void* field. *)
+ let subs = Pcre.exec ~rex:re_voidptrfield line in
+ let name = Pcre.get_substring subs 1 in
+ (try
+ let subs = Pcre.exec ~rex:re_offsetsize line in
+ let offset = int_of_string (Pcre.get_substring subs 1) in
+ let size = int_of_string (Pcre.get_substring subs 2) in
+ let field =
+ { field_name = name; field_type = FVoidPointer;
+ field_offset = offset; field_size = size } in
+ field :: parse basename lines
+ with
+ Not_found -> parse basename lines
+ );
+
+ | line :: lines when Pcre.pmatch ~rex:re_strfield line ->
+ (* A string (char array) field. *)
+ let subs = Pcre.exec ~rex:re_strfield line in
+ let name = Pcre.get_substring subs 1 in
+ let width = int_of_string (Pcre.get_substring subs 2) in
+ (try
+ let subs = Pcre.exec ~rex:re_offsetsize line in
+ let offset = int_of_string (Pcre.get_substring subs 1) in
+ let size = int_of_string (Pcre.get_substring subs 2) in
+ let field =
+ { field_name = name; field_type = FString width;
+ field_offset = offset; field_size = size } in
+ field :: parse basename lines
+ with
+ Not_found -> parse basename lines
+ );
+
+ | _ :: lines ->
+ (* Just ignore any other field we can't parse. *)
+ parse basename lines
+ in
+
+ let structures = List.filter_map (
+ fun struct_name ->
+ let body =
+ try Some (Hashtbl.find bodies struct_name)
+ with Not_found -> None in
+ match body with
+ | None -> None
+ | Some body ->
+ let body = List.tl body in (* Don't care about opener line. *)
+ let fields = parse basename body in
+
+ (* Compute total size of the structure. *)
+ let total_size =
+ let fields = List.map (
+ fun { field_offset = offset;
+ field_size = size } -> offset + size
+ ) fields in
+ List.fold_left max 0 fields in
+
+ Some { struct_name = struct_name;
+ struct_fields = fields;
+ struct_total_size = total_size }
+ ) struct_names in
+
+ structures
git.annexia.org / virt-mem.git / blobdiff