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Add MALLOC_DEBUG env var to debug applications using malloc

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This commit is contained in:
Erik van der Kouwe
2010-08-20 19:16:31 +00:00
parent b337d3f8e5
commit 2a736d0c2e
5 changed files with 281 additions and 0 deletions
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16
lib/libc/ansi/malloc.c
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@@ -14,6 +14,15 @@
#include <errno.h>
#include <assert.h>
#include "malloc-debug.h"
static int no_debug = -1;
#define CHECK_DBG(statement) \
if (no_debug <= 0) { \
if (no_debug < 0) no_debug = getenv("MALLOC_DEBUG") ? 0 : 1; \
if (no_debug == 0) { statement; } \
}
#if _EM_WSIZE == _EM_PSIZE
#define ptrint int
#else
@@ -83,6 +92,8 @@ malloc(const size_t size)
if (size == 0)
return NULL;
CHECK_DBG(return _dbg_malloc(size));
for (ntries = 0; ntries < 2; ntries++) {
unsigned len = Align(size, PTRSIZE) + PTRSIZE;
if (len < 2 * PTRSIZE) {
@@ -140,6 +151,9 @@ realloc(void *oldp, size_t size)
free(old);
return NULL;
}
CHECK_DBG(return _dbg_realloc(oldp, size));
len = Align(size, PTRSIZE) + PTRSIZE;
next = NextSlot(old);
n = (int)(next - old); /* old length */
@@ -188,6 +202,8 @@ free(void *ptr)
if (p == 0)
return;
CHECK_DBG(_dbg_free(ptr); return);
#ifdef SLOWDEBUG
{
int found;