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[asan] don't require __cxa_throw to be present in the process. This is the last dependency on libstdc++ 

llvm-svn: 145821
This commit is contained in:
Kostya Serebryany 2011-12-05 17:56:32 +00:00
parent 97a6028b3a
commit 93927f9e01
2 changed files with 18 additions and 2 deletions
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17
compiler-rt/lib/asan/asan_interceptors.h
View File

@ -37,18 +37,33 @@
#include "mach_override/mach_override.h"
#define WRAP(x) wrap_##x
#define WRAPPER_NAME(x) "wrap_"#x
#define OVERRIDE_FUNCTION(oldfunc, newfunc) \
CHECK(0 == mach_override_ptr((void*)(oldfunc), \
(void*)(newfunc), \
(void**)&real_##oldfunc)); \
CHECK(real_##oldfunc != NULL);
#define OVERRIDE_FUNCTION_IF_EXISTS(oldfunc, newfunc) \
do { mach_override_ptr((void*)(oldfunc), \
(void*)(newfunc), \
(void**)&real_##oldfunc); } while (0)
#define INTERCEPT_FUNCTION(func) \
OVERRIDE_FUNCTION(func, WRAP(func))
#else
#define INTERCEPT_FUNCTION_IF_EXISTS(func) \
OVERRIDE_FUNCTION_IF_EXISTS(func, WRAP(func))
#else // __linux__
#define WRAP(x) x
#define WRAPPER_NAME(x) #x
#define INTERCEPT_FUNCTION(func) \
CHECK((real_##func = (func##_f)dlsym(RTLD_NEXT, #func)));
#define INTERCEPT_FUNCTION_IF_EXISTS(func) \
do { real_##func = (func##_f)dlsym(RTLD_NEXT, #func); } while (0)
#endif
#ifdef __APPLE__

3
compiler-rt/lib/asan/asan_rtl.cc
View File

@ -507,6 +507,7 @@ extern "C" void __cxa_throw(void *a, void *b, void *c);
#if ASAN_HAS_EXCEPTIONS
extern "C" void WRAP(__cxa_throw)(void *a, void *b, void *c) {
CHECK(&real___cxa_throw);
UnpoisonStackFromHereToTop();
real___cxa_throw(a, b, c);
}
@ -690,7 +691,7 @@ void __asan_init() {
INTERCEPT_FUNCTION(signal);
INTERCEPT_FUNCTION(longjmp);
INTERCEPT_FUNCTION(_longjmp);
INTERCEPT_FUNCTION(__cxa_throw);
INTERCEPT_FUNCTION_IF_EXISTS(__cxa_throw);
INTERCEPT_FUNCTION(pthread_create);
#ifdef __APPLE__
INTERCEPT_FUNCTION(dispatch_async_f);