[libcxxabi] When built with ASan, __cxa_throw calls __asan_handle_no_return
The ASan runtime on many systems intercepts cxa_throw just so it
can call asan_handle_no_return first. Some newer systems such as
Fuchsia don't use interceptors on standard library functions at all,
but instead use sanitizer-instrumented versions of the standard
libraries. When libc++abi is built with ASan, cxa_throw can just
call asan_handle_no_return itself so no interceptor is required.
Patch by Roland McGrath
Differential Revision: https://reviews.llvm.org/D36599
git-svn-id: https://llvm.org/svn/llvm-project/libcxxabi/trunk@311045 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/src/cxa_exception.cpp b/src/cxa_exception.cpp
index 0794444..204ea2d 100644
--- a/src/cxa_exception.cpp
+++ b/src/cxa_exception.cpp
@@ -19,6 +19,10 @@
#include "cxa_handlers.hpp"
#include "fallback_malloc.h"
+#if __has_feature(address_sanitizer)
+#include <sanitizer/asan_interface.h>
+#endif
+
// +---------------------------+-----------------------------+---------------+
// | __cxa_exception | _Unwind_Exception CLNGC++\0 | thrown object |
// +---------------------------+-----------------------------+---------------+
@@ -217,6 +221,12 @@
globals->uncaughtExceptions += 1; // Not atomically, since globals are thread-local
exception_header->unwindHeader.exception_cleanup = exception_cleanup_func;
+
+#if __has_feature(address_sanitizer)
+ // Inform the ASan runtime that now might be a good time to clean stuff up.
+ __asan_handle_no_return();
+#endif
+
#ifdef __USING_SJLJ_EXCEPTIONS__
_Unwind_SjLj_RaiseException(&exception_header->unwindHeader);
#else
