Disable malloc debug when asan enabled.

Bug: 123312263

Test: Verified with asan enabled, malloc debug does not initialize.
Test: Ran tests on non-asan build and verify they pass.
Change-Id: I3c37c170bf6c1de42740972f2113ae991351d931

1 files changed, 7 insertions, 0 deletions

diff --git a/libc/malloc_debug/malloc_debug.cpp b/libc/malloc_debug/malloc_debug.cpp
index 53fcead01..c030d5429 100644
--- a/libc/malloc_debug/malloc_debug.cpp
+++ b/libc/malloc_debug/malloc_debug.cpp
@@ -252,12 +252,19 @@ static void* InitHeader(Header* header, void* orig_pointer, size_t size) {
   return g_debug->GetPointer(header);
 }
 
+extern "C" void __asan_init() __attribute__((weak));
+
 bool debug_initialize(const MallocDispatch* malloc_dispatch, bool* zygote_child,
                       const char* options) {
   if (zygote_child == nullptr || options == nullptr) {
     return false;
   }
 
+  if (__asan_init != 0) {
+    error_log("malloc debug cannot be enabled alongside ASAN");
+    return false;
+  }
+
   InitAtfork();
 
   g_zygote_child = zygote_child;