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More debug goodies:

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WINDOWS CRASH EMULATION!

If you use the -d (debug) argument for starting blender, it will now:

- set all freed memory to 0xFFFFFFFF
- set all malloced memory to 0xFFFFFFFF

The first option will give nice crashers when you read from freed memory.
The second option is for OSX especially, it has the nasty habit to give
zeroed mallocs.
This commit is contained in:
Ton Roosendaal 2006-11-27 13:59:55 +00:00
parent 2e0084c2d9
commit 6d540b6333
2 changed files with 22 additions and 5 deletions
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4
intern/guardedalloc/MEM_guardedalloc.h
View File

@ -115,6 +115,10 @@ extern "C" {
/** Set thread locking functions for safe memory allocation from multiple
threads, pass NULL pointers to disable thread locking again. */
void MEM_set_lock_callback(void (*lock)(void), void (*unlock)(void));
/** Attempt to enforce OSX (or other OS's) to have malloc and stack nonzero */
void MEM_set_memory_debug(void);
#ifdef __cplusplus
}

23
intern/guardedalloc/intern/mallocn.c
View File

@ -120,6 +120,8 @@ static void (*error_callback)(char *) = NULL;
static void (*thread_lock_callback)(void) = NULL;
static void (*thread_unlock_callback)(void) = NULL;
static int malloc_debug_memset= 0;
#ifdef malloc
#undef malloc
#endif
@ -187,6 +189,11 @@ void MEM_set_lock_callback(void (*lock)(void), void (*unlock)(void))
thread_unlock_callback = unlock;
}
void MEM_set_memory_debug(void)
{
malloc_debug_memset= 1;
}
int MEM_allocN_len(void *vmemh)
{
if (vmemh) {
@ -253,6 +260,8 @@ void *MEM_mallocN(unsigned int len, const char *str)
if(memh) {
make_memhead_header(memh, len, str);
mem_unlock_thread();
if(malloc_debug_memset && len)
memset(memh+1, 255, len);
return (++memh);
}
mem_unlock_thread();
@ -447,10 +456,11 @@ static void remlink(volatile localListBase *listbase, void *vlink)
static void rem_memblock(MemHead *memh)
{
remlink(membase,&memh->next);
if (memh->prev){
if (memh->next) MEMNEXT(memh->prev)->nextname =
MEMNEXT(memh->next)->name;
else MEMNEXT(memh->prev)->nextname = 0;
if (memh->prev) {
if (memh->next)
MEMNEXT(memh->prev)->nextname = MEMNEXT(memh->next)->name;
else
MEMNEXT(memh->prev)->nextname = NULL;
}
totblock--;
@ -465,8 +475,11 @@ MEMNEXT(memh->next)->name;
if (munmap(memh, memh->len + sizeof(MemHead) + sizeof(MemTail)))
printf("Couldn't unmap memory %s\n", memh->name);
}
else
else {
if(malloc_debug_memset && memh->len)
memset(memh+1, 255, memh->len);
free(memh);
}
#endif
}