[LibFuzzer]
Work around crashes in ``__sanitizer_malloc_hook()`` under Mac OSX.
Under Mac OSX we intercept calls to malloc before thread local
storage is initialised leading to a crash when accessing
``AllocTracer``. To workaround this ``AllocTracer`` is only accessed
in the hook under Linux. For symmetry ``__sanitizer_free_hook()``
is also modified in the same way.
To support this change a set of new macros
LIBFUZZER_LINUX and LIBFUZZER_APPLE has been defined which can be
used to check the target being compiled for.
Differential Revision: http://reviews.llvm.org/D20402
llvm-svn: 270145
diff --git a/llvm/lib/Fuzzer/FuzzerInternal.h b/llvm/lib/Fuzzer/FuzzerInternal.h
index f43f99f..c3d3f9e 100644
--- a/llvm/lib/Fuzzer/FuzzerInternal.h
+++ b/llvm/lib/Fuzzer/FuzzerInternal.h
@@ -27,6 +27,17 @@
#include "FuzzerInterface.h"
#include "FuzzerTracePC.h"
+// Platform detection.
+#ifdef __linux__
+#define LIBFUZZER_LINUX 1
+#define LIBFUZZER_APPLE 0
+#elif __APPLE__
+#define LIBFUZZER_LINUX 0
+#define LIBFUZZER_APPLE 1
+#else
+#error "Support for your platform has not been implemented"
+#endif
+
namespace fuzzer {
typedef int (*UserCallback)(const uint8_t *Data, size_t Size);