From b67792520cd64cf1875fc14084dce1bd78e33b6b Mon Sep 17 00:00:00 2001
From: Karl Heuer <kwzh@gnu.org>
Date: Tue, 29 Jun 1999 17:14:31 +0000
Subject: [PATCH] [DOUG_LEA_MALLOC] (malloc_initialize_hook): Move the handling
 of MALLOC_CHECK_ envvar here. (main): Moved from here.

[DOUG_LEA_MALLOC] (malloc_initialize_hook): New
function, assigned to the global __malloc_initialize_hook pointer.
(main): Move malloc_set_state call into malloc_initialize_hook
so that it happens as early as possible.
---
 src/emacs.c | 55 ++++++++++++++++++++++++++++++++++-------------------
 1 file changed, 35 insertions(+), 20 deletions(-)

diff --git a/src/emacs.c b/src/emacs.c
index 859e1dd9fd3..5721c2c9826 100644
--- a/src/emacs.c
+++ b/src/emacs.c
@@ -545,27 +545,17 @@ argmatch (argv, argc, sstr, lstr, minlen, valptr, skipptr)
     }
 }
 
-/* ARGSUSED */
-int
-main (argc, argv, envp)
-     int argc;
-     char **argv;
-     char **envp;
-{
-  char stack_bottom_variable;
-  int skip_args = 0;
-  extern int errno;
-  extern int sys_nerr;
-#ifdef HAVE_SETRLIMIT
-  struct rlimit rlim;
-#endif
-  int no_loadup = 0;
+#ifdef DOUG_LEA_MALLOC
 
-#ifdef LINUX_SBRK_BUG
-  __sbrk (1);
-#endif
+/* malloc can be invoked even before main (e.g. by the dynamic
+   linker), so the dumped malloc state must be restored as early as
+   possible using this special hook.  */
+
+static void
+malloc_initialize_hook ()
+{
+  extern char **environ;
 
-#ifdef DOUG_LEA_MALLOC
   if (initialized)
     {
       if (!malloc_using_checking)
@@ -575,7 +565,7 @@ main (argc, argv, envp)
 	{
 	  char **p;
 
-	  for (p = envp; *p; p++)
+	  for (p = environ; *p; p++)
 	    if (strncmp (*p, "MALLOC_CHECK_=", 14) == 0)
 	      {
 		do
@@ -584,11 +574,36 @@ main (argc, argv, envp)
 		break;
 	      }
 	}
+
       malloc_set_state (malloc_state_ptr);
       free (malloc_state_ptr);
     }
   else
     malloc_using_checking = getenv ("MALLOC_CHECK_") != NULL;
+}
+
+void (*__malloc_initialize_hook) () = malloc_initialize_hook;
+
+#endif /* DOUG_LEA_MALLOC */
+
+/* ARGSUSED */
+int
+main (argc, argv, envp)
+     int argc;
+     char **argv;
+     char **envp;
+{
+  char stack_bottom_variable;
+  int skip_args = 0;
+  extern int errno;
+  extern int sys_nerr;
+#ifdef HAVE_SETRLIMIT
+  struct rlimit rlim;
+#endif
+  int no_loadup = 0;
+
+#ifdef LINUX_SBRK_BUG
+  __sbrk (1);
 #endif
 
 #ifdef RUN_TIME_REMAP
-- 
2.39.2