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[asan] use some LIKELY/UNLIKELY 

llvm-svn: 208776
This commit is contained in:
Kostya Serebryany 2014-05-14 14:03:31 +00:00
parent 86e2470a5b
commit b9e31d7fcd
8 changed files with 32 additions and 30 deletions
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2
compiler-rt/lib/asan/asan_allocator2.cc
View File

@ -281,7 +281,7 @@ void ReInitializeAllocator() {
static void *Allocate(uptr size, uptr alignment, StackTrace *stack, static void *Allocate(uptr size, uptr alignment, StackTrace *stack,
AllocType alloc_type, bool can_fill) { AllocType alloc_type, bool can_fill) {
if (!asan_inited) if (UNLIKELY(!asan_inited))
AsanInitFromRtl(); AsanInitFromRtl();
Flags &fl = *flags(); Flags &fl = *flags();
CHECK(stack); CHECK(stack);

28
compiler-rt/lib/asan/asan_interceptors.cc
View File

@ -119,10 +119,12 @@ DECLARE_REAL_AND_INTERCEPTOR(void, free, void *)
#define COMMON_INTERCEPTOR_READ_RANGE(ctx, ptr, size) ASAN_READ_RANGE(ptr, size) #define COMMON_INTERCEPTOR_READ_RANGE(ctx, ptr, size) ASAN_READ_RANGE(ptr, size)
#define COMMON_INTERCEPTOR_ENTER(ctx, func, ...) \ #define COMMON_INTERCEPTOR_ENTER(ctx, func, ...) \
do { \ do { \
if (asan_init_is_running) return REAL(func)(__VA_ARGS__); \ if (asan_init_is_running) \
return REAL(func)(__VA_ARGS__); \
ctx = 0; \ ctx = 0; \
(void) ctx; \ (void) ctx; \
if (SANITIZER_MAC && !asan_inited) return REAL(func)(__VA_ARGS__); \ if (SANITIZER_MAC && UNLIKELY(!asan_inited)) \
return REAL(func)(__VA_ARGS__); \
ENSURE_ASAN_INITED(); \ ENSURE_ASAN_INITED(); \
} while (false) } while (false)
#define COMMON_INTERCEPTOR_FD_ACQUIRE(ctx, fd) \ #define COMMON_INTERCEPTOR_FD_ACQUIRE(ctx, fd) \
@ -328,7 +330,7 @@ static inline int CharCmp(unsigned char c1, unsigned char c2) {
} }
INTERCEPTOR(int, memcmp, const void *a1, const void *a2, uptr size) { INTERCEPTOR(int, memcmp, const void *a1, const void *a2, uptr size) {
if (!asan_inited) return internal_memcmp(a1, a2, size); if (UNLIKELY(!asan_inited)) return internal_memcmp(a1, a2, size);
ENSURE_ASAN_INITED(); ENSURE_ASAN_INITED();
if (flags()->replace_intrin) { if (flags()->replace_intrin) {
if (flags()->strict_memcmp) { if (flags()->strict_memcmp) {
@ -356,7 +358,7 @@ INTERCEPTOR(int, memcmp, const void *a1, const void *a2, uptr size) {
} }
void *__asan_memcpy(void *to, const void *from, uptr size) { void *__asan_memcpy(void *to, const void *from, uptr size) {
if (!asan_inited) return internal_memcpy(to, from, size); if (UNLIKELY(!asan_inited)) return internal_memcpy(to, from, size);
// memcpy is called during __asan_init() from the internals // memcpy is called during __asan_init() from the internals
// of printf(...). // of printf(...).
if (asan_init_is_running) { if (asan_init_is_running) {
@ -376,7 +378,7 @@ void *__asan_memcpy(void *to, const void *from, uptr size) {
} }
void *__asan_memset(void *block, int c, uptr size) { void *__asan_memset(void *block, int c, uptr size) {
if (!asan_inited) return internal_memset(block, c, size); if (UNLIKELY(!asan_inited)) return internal_memset(block, c, size);
// memset is called inside Printf. // memset is called inside Printf.
if (asan_init_is_running) { if (asan_init_is_running) {
return REAL(memset)(block, c, size); return REAL(memset)(block, c, size);
@ -389,7 +391,7 @@ void *__asan_memset(void *block, int c, uptr size) {
} }
void *__asan_memmove(void *to, const void *from, uptr size) { void *__asan_memmove(void *to, const void *from, uptr size) {
if (!asan_inited) if (UNLIKELY(!asan_inited))
return internal_memmove(to, from, size); return internal_memmove(to, from, size);
ENSURE_ASAN_INITED(); ENSURE_ASAN_INITED();
if (flags()->replace_intrin) { if (flags()->replace_intrin) {
@ -422,7 +424,7 @@ INTERCEPTOR(void*, memset, void *block, int c, uptr size) {
} }
INTERCEPTOR(char*, strchr, const char *str, int c) { INTERCEPTOR(char*, strchr, const char *str, int c) {
if (!asan_inited) return internal_strchr(str, c); if (UNLIKELY(!asan_inited)) return internal_strchr(str, c);
// strchr is called inside create_purgeable_zone() when MallocGuardEdges=1 is // strchr is called inside create_purgeable_zone() when MallocGuardEdges=1 is
// used. // used.
if (asan_init_is_running) { if (asan_init_is_running) {
@ -491,7 +493,7 @@ INTERCEPTOR(char*, strncat, char *to, const char *from, uptr size) {
INTERCEPTOR(char*, strcpy, char *to, const char *from) { // NOLINT INTERCEPTOR(char*, strcpy, char *to, const char *from) { // NOLINT
#if SANITIZER_MAC #if SANITIZER_MAC
if (!asan_inited) return REAL(strcpy)(to, from); // NOLINT if (UNLIKELY(!asan_inited)) return REAL(strcpy)(to, from); // NOLINT
#endif #endif
// strcpy is called from malloc_default_purgeable_zone() // strcpy is called from malloc_default_purgeable_zone()
// in __asan::ReplaceSystemAlloc() on Mac. // in __asan::ReplaceSystemAlloc() on Mac.
@ -510,7 +512,7 @@ INTERCEPTOR(char*, strcpy, char *to, const char *from) { // NOLINT
#if ASAN_INTERCEPT_STRDUP #if ASAN_INTERCEPT_STRDUP
INTERCEPTOR(char*, strdup, const char *s) { INTERCEPTOR(char*, strdup, const char *s) {
if (!asan_inited) return internal_strdup(s); if (UNLIKELY(!asan_inited)) return internal_strdup(s);
ENSURE_ASAN_INITED(); ENSURE_ASAN_INITED();
uptr length = REAL(strlen)(s); uptr length = REAL(strlen)(s);
if (flags()->replace_str) { if (flags()->replace_str) {
@ -524,7 +526,7 @@ INTERCEPTOR(char*, strdup, const char *s) {
#endif #endif
INTERCEPTOR(uptr, strlen, const char *s) { INTERCEPTOR(uptr, strlen, const char *s) {
if (!asan_inited) return internal_strlen(s); if (UNLIKELY(!asan_inited)) return internal_strlen(s);
// strlen is called from malloc_default_purgeable_zone() // strlen is called from malloc_default_purgeable_zone()
// in __asan::ReplaceSystemAlloc() on Mac. // in __asan::ReplaceSystemAlloc() on Mac.
if (asan_init_is_running) { if (asan_init_is_running) {
@ -606,7 +608,7 @@ INTERCEPTOR(long, strtol, const char *nptr, // NOLINT
INTERCEPTOR(int, atoi, const char *nptr) { INTERCEPTOR(int, atoi, const char *nptr) {
#if SANITIZER_MAC #if SANITIZER_MAC
if (!asan_inited) return REAL(atoi)(nptr); if (UNLIKELY(!asan_inited)) return REAL(atoi)(nptr);
#endif #endif
ENSURE_ASAN_INITED(); ENSURE_ASAN_INITED();
if (!flags()->replace_str) { if (!flags()->replace_str) {
@ -625,7 +627,7 @@ INTERCEPTOR(int, atoi, const char *nptr) {
INTERCEPTOR(long, atol, const char *nptr) { // NOLINT INTERCEPTOR(long, atol, const char *nptr) { // NOLINT
#if SANITIZER_MAC #if SANITIZER_MAC
if (!asan_inited) return REAL(atol)(nptr); if (UNLIKELY(!asan_inited)) return REAL(atol)(nptr);
#endif #endif
ENSURE_ASAN_INITED(); ENSURE_ASAN_INITED();
if (!flags()->replace_str) { if (!flags()->replace_str) {
@ -682,7 +684,7 @@ static void AtCxaAtexit(void *unused) {
INTERCEPTOR(int, __cxa_atexit, void (*func)(void *), void *arg, INTERCEPTOR(int, __cxa_atexit, void (*func)(void *), void *arg,
void *dso_handle) { void *dso_handle) {
#if SANITIZER_MAC #if SANITIZER_MAC
if (!asan_inited) return REAL(__cxa_atexit)(func, arg, dso_handle); if (UNLIKELY(!asan_inited)) return REAL(__cxa_atexit)(func, arg, dso_handle);
#endif #endif
ENSURE_ASAN_INITED(); ENSURE_ASAN_INITED();
int res = REAL(__cxa_atexit)(func, arg, dso_handle); int res = REAL(__cxa_atexit)(func, arg, dso_handle);

2
compiler-rt/lib/asan/asan_interceptors.h
View File

@ -96,7 +96,7 @@ void InitializeAsanInterceptors();
#define ENSURE_ASAN_INITED() do { \ #define ENSURE_ASAN_INITED() do { \
CHECK(!asan_init_is_running); \ CHECK(!asan_init_is_running); \
if (!asan_inited) { \ if (UNLIKELY(!asan_inited)) { \
AsanInitFromRtl(); \ AsanInitFromRtl(); \
} \ } \
} while (0) } while (0)

2
compiler-rt/lib/asan/asan_malloc_linux.cc
View File

@ -77,7 +77,7 @@ INTERCEPTOR(void*, malloc, uptr size) {
} }
INTERCEPTOR(void*, calloc, uptr nmemb, uptr size) { INTERCEPTOR(void*, calloc, uptr nmemb, uptr size) {
if (!asan_inited) { if (UNLIKELY(!asan_inited)) {
// Hack: dlsym calls calloc before REAL(calloc) is retrieved from dlsym. // Hack: dlsym calls calloc before REAL(calloc) is retrieved from dlsym.
const uptr kCallocPoolSize = 1024; const uptr kCallocPoolSize = 1024;
static uptr calloc_memory_for_dlsym[kCallocPoolSize]; static uptr calloc_memory_for_dlsym[kCallocPoolSize];

8
compiler-rt/lib/asan/asan_malloc_mac.cc
View File

@ -159,7 +159,7 @@ size_t mz_size(malloc_zone_t* zone, const void* ptr) {
} }
void *mz_malloc(malloc_zone_t *zone, size_t size) { void *mz_malloc(malloc_zone_t *zone, size_t size) {
if (!asan_inited) { if (UNLIKELY(!asan_inited)) {
CHECK(system_malloc_zone); CHECK(system_malloc_zone);
return malloc_zone_malloc(system_malloc_zone, size); return malloc_zone_malloc(system_malloc_zone, size);
} }
@ -168,7 +168,7 @@ void *mz_malloc(malloc_zone_t *zone, size_t size) {
} }
void *mz_calloc(malloc_zone_t *zone, size_t nmemb, size_t size) { void *mz_calloc(malloc_zone_t *zone, size_t nmemb, size_t size) {
if (!asan_inited) { if (UNLIKELY(!asan_inited)) {
// Hack: dlsym calls calloc before REAL(calloc) is retrieved from dlsym. // Hack: dlsym calls calloc before REAL(calloc) is retrieved from dlsym.
const size_t kCallocPoolSize = 1024; const size_t kCallocPoolSize = 1024;
static uptr calloc_memory_for_dlsym[kCallocPoolSize]; static uptr calloc_memory_for_dlsym[kCallocPoolSize];
@ -184,7 +184,7 @@ void *mz_calloc(malloc_zone_t *zone, size_t nmemb, size_t size) {
} }
void *mz_valloc(malloc_zone_t *zone, size_t size) { void *mz_valloc(malloc_zone_t *zone, size_t size) {
if (!asan_inited) { if (UNLIKELY(!asan_inited)) {
CHECK(system_malloc_zone); CHECK(system_malloc_zone);
return malloc_zone_valloc(system_malloc_zone, size); return malloc_zone_valloc(system_malloc_zone, size);
} }
@ -242,7 +242,7 @@ void mz_destroy(malloc_zone_t* zone) {
#if defined(MAC_OS_X_VERSION_10_6) && \ #if defined(MAC_OS_X_VERSION_10_6) && \
MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_6 MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_6
void *mz_memalign(malloc_zone_t *zone, size_t align, size_t size) { void *mz_memalign(malloc_zone_t *zone, size_t align, size_t size) {
if (!asan_inited) { if (UNLIKELY(!asan_inited)) {
CHECK(system_malloc_zone); CHECK(system_malloc_zone);
return malloc_zone_memalign(system_malloc_zone, align, size); return malloc_zone_memalign(system_malloc_zone, align, size);
} }

4
compiler-rt/lib/asan/asan_rtl.cc
View File

@ -552,7 +552,7 @@ static void PrintAddressSpaceLayout() {
} }
static void AsanInitInternal() { static void AsanInitInternal() {
if (asan_inited) return; if (LIKELY(asan_inited)) return;
SanitizerToolName = "AddressSanitizer"; SanitizerToolName = "AddressSanitizer";
CHECK(!asan_init_is_running && "ASan init calls itself!"); CHECK(!asan_init_is_running && "ASan init calls itself!");
asan_init_is_running = true; asan_init_is_running = true;
@ -708,7 +708,7 @@ public: // NOLINT
AsanInitializer() { AsanInitializer() {
AsanCheckIncompatibleRT(); AsanCheckIncompatibleRT();
AsanCheckDynamicRTPrereqs(); AsanCheckDynamicRTPrereqs();
if (!asan_inited) if (UNLIKELY(!asan_inited))
__asan_init(); __asan_init();
} }
}; };

2
compiler-rt/lib/asan/asan_stack.h
View File

@ -32,7 +32,7 @@ void GetStackTraceWithPcBpAndContext(StackTrace *stack, uptr max_depth, uptr pc,
#else #else
AsanThread *t; AsanThread *t;
stack->size = 0; stack->size = 0;
if (asan_inited) { if (LIKELY(asan_inited)) {
if ((t = GetCurrentThread()) && !t->isUnwinding()) { if ((t = GetCurrentThread()) && !t->isUnwinding()) {
uptr stack_top = t->stack_top(); uptr stack_top = t->stack_top();
uptr stack_bottom = t->stack_bottom(); uptr stack_bottom = t->stack_bottom();

4
compiler-rt/lib/sanitizer_common/sanitizer_internal_defs.h
View File

@ -199,7 +199,7 @@ void NORETURN CheckFailed(const char *file, int line, const char *cond,
// Check macro // Check macro
#define RAW_CHECK_MSG(expr, msg) do { \ #define RAW_CHECK_MSG(expr, msg) do { \
if (!(expr)) { \ if (UNLIKELY(!(expr))) { \
RawWrite(msg); \ RawWrite(msg); \
Die(); \ Die(); \
} \ } \
@ -211,7 +211,7 @@ void NORETURN CheckFailed(const char *file, int line, const char *cond,
do { \ do { \
__sanitizer::u64 v1 = (u64)(c1); \ __sanitizer::u64 v1 = (u64)(c1); \
__sanitizer::u64 v2 = (u64)(c2); \ __sanitizer::u64 v2 = (u64)(c2); \
if (!(v1 op v2)) \ if (UNLIKELY(!(v1 op v2))) \
__sanitizer::CheckFailed(__FILE__, __LINE__, \ __sanitizer::CheckFailed(__FILE__, __LINE__, \
"(" #c1 ") " #op " (" #c2 ")", v1, v2); \ "(" #c1 ") " #op " (" #c2 ")", v1, v2); \
} while (false) \ } while (false) \