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Diffstat (limited to 'malloc')
-rw-r--r--malloc/hooks.c71
-rw-r--r--malloc/malloc.c61
2 files changed, 52 insertions, 80 deletions
diff --git a/malloc/hooks.c b/malloc/hooks.c
index 020657a368..ebb37de969 100644
--- a/malloc/hooks.c
+++ b/malloc/hooks.c
@@ -1,5 +1,5 @@
/* Malloc implementation for multiple threads without lock contention.
- Copyright (C) 2001, 2002, 2003 Free Software Foundation, Inc.
+ Copyright (C) 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Wolfram Gloger <wg@malloc.de>, 2001.
@@ -20,10 +20,6 @@
/* $Id$ */
-#ifndef DEFAULT_CHECK_ACTION
-#define DEFAULT_CHECK_ACTION 1
-#endif
-
/* What to do if the standard debugging hooks are in place and a
corrupt pointer is detected: do nothing (0), print an error message
(1), or call abort() (2). */
@@ -71,9 +67,6 @@ memalign_hook_ini(alignment, sz, caller)
return public_mEMALIGn(alignment, sz);
}
-
-static int check_action = DEFAULT_CHECK_ACTION;
-
/* Whether we are using malloc checking. */
static int using_malloc_checking;
@@ -106,18 +99,7 @@ __malloc_check_init()
__realloc_hook = realloc_check;
__memalign_hook = memalign_check;
if(check_action & 1)
- {
-#ifdef _LIBC
- _IO_flockfile (stderr);
- int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
- ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL;
-#endif
- fprintf(stderr, "malloc: using debugging hooks\n");
-#ifdef _LIBC
- ((_IO_FILE *) stderr)->_flags2 |= old_flags2;
- _IO_funlockfile (stderr);
-#endif
- }
+ malloc_printf_nc (1, "malloc: using debugging hooks\n");
}
/* A simple, standard set of debugging hooks. Overhead is `only' one
@@ -234,21 +216,7 @@ top_check()
if((char*)t + chunksize(t) == mp_.sbrk_base + main_arena.system_mem ||
t == initial_top(&main_arena)) return 0;
- if(check_action & 1)
- {
-#ifdef _LIBC
- _IO_flockfile (stderr);
- int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
- ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL;
-#endif
- fprintf(stderr, "malloc: top chunk is corrupt\n");
-#ifdef _LIBC
- ((_IO_FILE *) stderr)->_flags2 |= old_flags2;
- _IO_funlockfile (stderr);
-#endif
- }
- if(check_action & 2)
- abort();
+ malloc_printf_nc (check_action, "malloc: top chunk is corrupt\n");
/* Try to set up a new top chunk. */
brk = MORECORE(0);
@@ -299,21 +267,8 @@ free_check(mem, caller) Void_t* mem; const Void_t *caller;
p = mem2chunk_check(mem);
if(!p) {
(void)mutex_unlock(&main_arena.mutex);
- if(check_action & 1)
- {
-#ifdef _LIBC
- _IO_flockfile (stderr);
- int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
- ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL;
-#endif
- fprintf(stderr, "free(): invalid pointer %p!\n", mem);
-#ifdef _LIBC
- ((_IO_FILE *) stderr)->_flags2 |= old_flags2;
- _IO_funlockfile (stderr);
-#endif
- }
- if(check_action & 2)
- abort();
+
+ malloc_printf_nc(check_action, "free(): invalid pointer %p!\n", mem);
return;
}
#if HAVE_MMAP
@@ -347,21 +302,7 @@ realloc_check(oldmem, bytes, caller)
oldp = mem2chunk_check(oldmem);
(void)mutex_unlock(&main_arena.mutex);
if(!oldp) {
- if(check_action & 1)
- {
-#ifdef _LIBC
- _IO_flockfile (stderr);
- int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
- ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL;
-#endif
- fprintf(stderr, "realloc(): invalid pointer %p!\n", oldmem);
-#ifdef _LIBC
- ((_IO_FILE *) stderr)->_flags2 |= old_flags2;
- _IO_funlockfile (stderr);
-#endif
- }
- if(check_action & 2)
- abort();
+ malloc_printf_nc(check_action, "realloc(): invalid pointer %p!\n", oldmem);
return malloc_check(bytes, NULL);
}
oldsize = chunksize(oldp);
diff --git a/malloc/malloc.c b/malloc/malloc.c
index 6e6c1053b1..206be503a8 100644
--- a/malloc/malloc.c
+++ b/malloc/malloc.c
@@ -280,6 +280,9 @@ extern "C" {
/* For uintptr_t. */
#include <stdint.h>
+/* For va_arg, va_start, va_end. */
+#include <stdarg.h>
+
/*
Debugging:
@@ -1498,6 +1501,7 @@ static size_t mUSABLe(Void_t*);
static void mSTATs(void);
static int mALLOPt(int, int);
static struct mallinfo mALLINFo(mstate);
+static void malloc_printf_nc(int action, const char *template, ...);
static Void_t* internal_function mem2mem_check(Void_t *p, size_t sz);
static int internal_function top_check(void);
@@ -1966,6 +1970,9 @@ typedef struct malloc_chunk* mbinptr;
#define unlink(P, BK, FD) { \
FD = P->fd; \
BK = P->bk; \
+ if (__builtin_expect (FD->bk != P || BK->fd != P, 0)) \
+ malloc_printf_nc (check_action, \
+ "corrupted double-linked list at %p!\n", P); \
FD->bk = BK; \
BK->fd = FD; \
}
@@ -2327,6 +2334,15 @@ __malloc_ptr_t weak_variable (*__memalign_hook)
void weak_variable (*__after_morecore_hook) __MALLOC_P ((void)) = NULL;
+/* ---------------- Error behavior ------------------------------------ */
+
+#ifndef DEFAULT_CHECK_ACTION
+#define DEFAULT_CHECK_ACTION 3
+#endif
+
+static int check_action = DEFAULT_CHECK_ACTION;
+
+
/* ------------------- Support for multiple arenas -------------------- */
#include "arena.c"
@@ -4164,21 +4180,7 @@ _int_free(mstate av, Void_t* mem)
here by accident or by "design" from some intruder. */
if (__builtin_expect ((uintptr_t) p > (uintptr_t) -size, 0))
{
- if (check_action & 1)
- {
-#ifdef _LIBC
- _IO_flockfile (stderr);
- int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
- ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL;
-#endif
- fprintf (stderr, "free(): invalid pointer %p!\n", mem);
-#ifdef _LIBC
- ((_IO_FILE *) stderr)->_flags2 |= old_flags2;
- _IO_funlockfile (stderr);
-#endif
- }
- if (check_action & 2)
- abort ();
+ malloc_printf_nc (check_action, "free(): invalid pointer %p!\n", mem);
return;
}
@@ -5404,6 +5406,35 @@ int mALLOPt(param_number, value) int param_number; int value;
*/
+/* Helper code. */
+
+static void
+malloc_printf_nc(int action, const char *template, ...)
+{
+ if (action & 1)
+ {
+#ifdef _LIBC
+ _IO_flockfile (stderr);
+ int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
+ ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL;
+#endif
+
+ va_list ap;
+ va_start (ap, template);
+
+ vfprintf (stderr, template, ap);
+
+ va_end (ap);
+
+#ifdef _LIBC
+ ((_IO_FILE *) stderr)->_flags2 |= old_flags2;
+ _IO_funlockfile (stderr);
+#endif
+ }
+ if (action & 2)
+ abort ();
+}
+
#ifdef _LIBC
# include <sys/param.h>
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-05 18:23:21 +0000