leak: Free PCRE regexps when library is unloaded.

The compiled PCRE regexps used for inspection were being leaked when
the library was unloaded.

(Found by valgrind).

diff --git a/src/inspect.c b/src/inspect.c
index 11a5374..bce0fd6 100644 (file)
--- a/src/inspect.c
+++ b/src/inspect.c
@@ -57,6 +57,8 @@ static pcre *re_xdev;
 static pcre *re_windows_version;
 
 static void compile_regexps (void) __attribute__((constructor));
+static void free_regexps (void) __attribute__((destructor));
+
 static void
 compile_regexps (void)
 {
@@ -88,6 +90,22 @@ compile_regexps (void)
   COMPILE (re_windows_version, "^(\\d+)\\.(\\d+)", 0);
 }
 
+static void
+free_regexps (void)
+{
+  pcre_free (re_file_elf);
+  pcre_free (re_file_win64);
+  pcre_free (re_elf_ppc64);
+  pcre_free (re_fedora);
+  pcre_free (re_rhel_old);
+  pcre_free (re_rhel);
+  pcre_free (re_rhel_no_minor);
+  pcre_free (re_debian);
+  pcre_free (re_aug_seq);
+  pcre_free (re_xdev);
+  pcre_free (re_windows_version);
+}
+
 /* Match a regular expression which contains no captures.  Returns
  * true if it matches or false if it doesn't.
  */