Add memdebug module, a simple malloc debugger

1 files changed, 44 insertions, 0 deletions

diff --git a/memdebug/memdebug.h b/memdebug/memdebug.h
new file mode 100644
index 0000000..d96e356
--- /dev/null
+++ b/memdebug/memdebug.h
@@ -0,0 +1,44 @@
+#ifndef _MEMDEBUG_H_
+#define _MEMDEBUG_H_
+
+#include <stdlib.h>
+
+#ifdef MEMDEBUG_TRACE
+# define memdebug_trace(fmt, args...) \
+	({ \
+	 fprintf(stderr, "\n\n*** " fmt " ***\n\n", ##args); \
+	 fflush(stderr); \
+	 })
+#else
+# define memdebug_trace(fmt, args...)
+#endif
+
+struct memdebug_heap_item {
+	struct memdebug_heap_item *next;
+
+	void *addr;
+	size_t size;
+
+	const char *func;
+	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) \
+	__memdebug_malloc(size, __func__, __FILE__, __LINE__)
+#define memdebug_free(ptr) \
+	__memdebug_free(ptr, __func__, __FILE__, __LINE__)
+
+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);
+
+#endif /* _MEMDEBUG_H_ */