add directory gnu

2024-02-19 00:24:47 -05:00
parent 32616db5a4
commit a40f4cadb0
5086 changed files with 1860970 additions and 0 deletions
--- a/gnu/glibc/glibc-1.03/malloc/mtrace.c
+++ b/gnu/glibc/glibc-1.03/malloc/mtrace.c
@@ -0,0 +1,137 @@
+/* More debugging hooks for `malloc'.
+   Copyright 1991 Free Software Foundation
+		  Written April 2, 1991 by John Gilmore of Cygnus Support
+		  Based on mcheck.c by Mike Haertel.
+
+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.  */
+
+/* IGNORE(@ */
+#include <ansidecl.h>
+#include <stdlib.h>
+/* @) */
+
+#include <stdio.h>
+#include <malloc.h>
+
+#ifndef	__GNU_LIBRARY__
+extern char *getenv ();
+#endif
+
+static FILE *mallstream;
+static char mallenv[] = "MALLOC_TRACE";
+static char mallbuf[BUFSIZ];	/* Buffer for the output.  */
+
+/* Address to breakpoint on accesses to... */
+PTR mallwatch;
+
+/* Old hook values.  */
+static void EXFUN((*old_free_hook), (PTR ptr));
+static PTR EXFUN((*old_malloc_hook), (size_t size));
+static PTR EXFUN((*old_realloc_hook), (PTR ptr, size_t size));
+
+/* 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.  */
+
+void
+DEFUN_VOID(tr_break)
+{
+}
+
+static void
+DEFUN(tr_freehook, (ptr), PTR ptr)
+{
+  fprintf(mallstream, "- %p\n", ptr);	/* Be sure to print it first.  */
+  if (ptr == mallwatch)
+    tr_break ();
+  __free_hook = old_free_hook;
+  free (ptr);
+  __free_hook = tr_freehook;
+}
+
+static PTR
+DEFUN(tr_mallochook, (size), size_t size)
+{
+  PTR hdr;
+
+  __malloc_hook = old_malloc_hook;
+  hdr = (PTR) malloc (size);
+  __malloc_hook = tr_mallochook;
+
+  /* We could be printing a NULL here; that's OK.  */
+  fprintf (mallstream, "+ %p %x\n", hdr, size);
+
+  if (hdr == mallwatch)
+    tr_break ();
+
+  return hdr;
+}
+
+static PTR
+DEFUN(tr_reallochook, (ptr, size), PTR ptr AND size_t size)
+{
+  PTR hdr;
+
+  if (ptr == mallwatch)
+    tr_break ();
+
+  __free_hook = old_free_hook;
+  __malloc_hook = old_malloc_hook;
+  __realloc_hook = old_realloc_hook;
+  hdr = (PTR) realloc (ptr, size);
+  __free_hook = tr_freehook;
+  __malloc_hook = tr_mallochook;
+  __realloc_hook = tr_reallochook;
+  if (hdr == NULL)
+    /* Failed realloc.  */
+    fprintf (mallstream, "! %p %x\n", ptr, size);
+  else
+    fprintf (mallstream, "< %p\n> %p %x\n", ptr, 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!  */
+
+void
+DEFUN_VOID(mtrace)
+{
+  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 malloc its buffer!  */
+	  setbuf (mallstream, mallbuf);
+	  fprintf (mallstream, "= Start\n");
+	  old_free_hook = __free_hook;
+	  __free_hook = tr_freehook;
+	  old_malloc_hook = __malloc_hook;
+	  __malloc_hook = tr_mallochook;
+	  old_realloc_hook = __realloc_hook;
+	  __realloc_hook = tr_reallochook;
+	}
+    }
+}