aboutsummaryrefslogtreecommitdiff
path: root/malloc/malloc.c
diff options
context:
space:
mode:
Diffstat (limited to 'malloc/malloc.c')
-rw-r--r--malloc/malloc.c61
1 files changed, 46 insertions, 15 deletions
diff --git a/malloc/malloc.c b/malloc/malloc.c
index 6e6c105..206be50 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>