Integrate address sanitizer

src/arena.c

@@ -26,6 +26,8 @@ Arena *arena_alloc_(const ArenaParams *params)
 
     // Note: only backend now is malloc
     void *base = memory_allocate(params->size);
+    //((U8*)base)[1023+ARENA_HEADER_SZ] = 1;
+
     Assert(base != NULL);
 
     Arena *arena = (Arena *)base;
@@ -37,6 +39,7 @@ Arena *arena_alloc_(const ArenaParams *params)
     arena->prev     = NULL;
     arena->checkpoint_level = 0;
 
+    ASAN_POISON_MEMORY_REGION(&arena->base[arena->pos], arena_available(arena));
     return arena;
 }
 
@@ -83,6 +86,7 @@ void *arena_push(Arena *arena, U32 size, U32 align)
     U8 *mem     = &current->base[start_pos];
     current->pos  = end_pos;
 
+    ASAN_UNPOISON_MEMORY_REGION(mem, size);
     return mem;
 }
 
@@ -94,6 +98,7 @@ void arena_pop_to(Arena *arena, U32 abs_pos)
         Arena *prev = current->prev;
 
         if (current->base_pos >= abs_pos) {
+            ASAN_UNPOISON_MEMORY_REGION(current->base, current->size);
             memory_release(current->base);
             arena->current = prev;
         } else {
@@ -102,6 +107,7 @@ void arena_pop_to(Arena *arena, U32 abs_pos)
             // is the right thing . shouldn't be able to pop to larger than what's already commited
             Assert(new_pos <= current->size);
             current->pos = new_pos;
+            ASAN_POISON_MEMORY_REGION(&current->base[current->pos], arena_available(arena));
             break;
         }