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-rw-r--r--memdebug/memdebug.c67
-rw-r--r--memdebug/memdebug.h4
2 files changed, 40 insertions, 31 deletions
diff --git a/memdebug/memdebug.c b/memdebug/memdebug.c
index 50a46fc..84a2c86 100644
--- a/memdebug/memdebug.c
+++ b/memdebug/memdebug.c
@@ -12,14 +12,31 @@
/* define/undef to enable tracing of errors */
#define MEMDEBUG_TRACE
-/* define/undef to enable tracing of double free errors */
-#define MEMDEBUG_TRACE_DOUBLE_FREE
#include "memdebug.h"
static struct memdebug_heap_item *heap_head = NULL;
static struct memdebug_heap_item *heap_tail = NULL;
+void memdebug_start(void)
+{
+ /* Empty for now */
+}
+
+void memdebug_cleanup(void)
+{
+ struct memdebug_heap_item *hi;
+
+ for (hi = heap_head; hi; hi = hi->next) {
+ if (hi->addr)
+ free(hi->addr);
+ free(hi);
+ }
+
+ heap_head = NULL;
+ heap_tail = NULL;
+}
+
void *__memdebug_malloc(size_t size, const char *func,
const char *file, const unsigned int line)
{
@@ -41,20 +58,15 @@ void *__memdebug_malloc(size_t size, const char *func,
hi->func = func;
hi->file = file;
hi->line = line;
-#ifdef MEMDEBUG_TRACE_DOUBLE_FREE
hi->freed_func = NULL;
hi->freed_file = NULL;
hi->line = 0;
-#endif
if (!heap_head)
heap_head = hi;
- if (!heap_tail)
- heap_tail = hi;
- else {
+ if (heap_tail)
heap_tail->next = hi;
- heap_tail = hi;
- }
+ heap_tail = hi;
return ret;
@@ -74,7 +86,7 @@ void __memdebug_free(void *ptr, const char *func,
}
for (hi = heap_head, prev = NULL; hi; prev = hi, hi = hi->next)
- if (hi->addr ==ptr)
+ if (hi->addr == ptr)
break;
if (!hi) {
@@ -82,7 +94,6 @@ void __memdebug_free(void *ptr, const char *func,
return;
}
-#ifdef MEMDEBUG_TRACE_DOUBLE_FREE
if (hi->freed_func) {
memdebug_trace("double free at %p (%s:%d:%s)\nalready freed by %s:%d:%s",
ptr, file, line, func, hi->freed_file, hi->freed_line, hi->freed_func);
@@ -92,31 +103,31 @@ void __memdebug_free(void *ptr, const char *func,
hi->freed_func = func;
hi->freed_file = file;
hi->freed_line = line;
-#else
- /* Delete the item from the linked list */
- if (prev)
- prev->next = hi->next;
- else
- heap_head = hi->next;
- if (heap_tail == hi)
- heap_tail = prev;
-
- free(hi);
-#endif
-
- free(ptr);
+
+ /* Free the memory but keep the memdebug information */
+ free(hi->addr);
+ hi->addr = NULL;
}
-void memdebug_report(void)
+void memdebug_report(int report_all)
{
struct memdebug_heap_item *hi;
size_t total_size = 0;
+ size_t still_allocated = 0;
- fprintf(stderr, "\n\n*** Reporting allocated memory ***\n");
+ fprintf(stderr, "\n\n*** Reporting allocated/freed memory ***\n");
for (hi = heap_head; hi; hi = hi->next) {
- fprintf(stderr, " %zu bytes at %p (%s:%d:%s)\n", hi->size, hi->addr, hi->file, hi->line, hi->func);
+ if (hi->addr) {
+ fprintf(stderr, " IN USE %zu bytes at %p (%s:%d:%s)\n",
+ hi->size, hi->addr, hi->file, hi->line, hi->func);
+ still_allocated += hi->size;
+ } else if (report_all) {
+ fprintf(stderr, " FREE %zu bytes at %p (%s:%d:%s)\n",
+ hi->size, hi->addr, hi->file, hi->line, hi->func);
+ }
total_size += hi->size;
}
- fprintf(stderr, "Total size: %zu bytes\n\n", total_size);
+ fprintf(stderr, "Total size: %zu bytes, %zu bytes still allocated\n\n",
+ total_size, still_allocated);
fflush(stderr);
}
diff --git a/memdebug/memdebug.h b/memdebug/memdebug.h
index 3ae1159..7a816c0 100644
--- a/memdebug/memdebug.h
+++ b/memdebug/memdebug.h
@@ -23,11 +23,9 @@ struct memdebug_heap_item {
const char *file;
unsigned int line;
-#ifdef MEMDEBUG_TRACE_DOUBLE_FREE
const char *freed_func;
const char *freed_file;
unsigned int freed_line;
-#endif
};
#define memdebug_malloc(size) \
@@ -39,6 +37,6 @@ void *__memdebug_malloc(size_t size, const char *func,
const char *file, const unsigned int line);
void __memdebug_free(void *ptr, const char *func,
const char *file, const unsigned int line);
-void memdebug_report(void);
+void memdebug_report(int report_all);
#endif /* _MEMDEBUG_H_ */