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[tsan] Add support for OS X OSAtomic* functions 

OS X provides atomic functions in libkern/OSAtomic.h. These provide atomic guarantees and they have alternatives which have barrier semantics. This patch adds proper TSan support for the functions from libkern/OSAtomic.h.

Differential Revision: http://reviews.llvm.org/D18500

llvm-svn: 265665
This commit is contained in:
Kuba Brecka 2016-04-07 12:05:09 +00:00
parent 7231c3372f
commit 74f7f399ac
3 changed files with 231 additions and 0 deletions
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140
compiler-rt/lib/tsan/rtl/tsan_interceptors_mac.cc
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@ -17,12 +17,152 @@
#include "interception/interception.h"
#include "tsan_interceptors.h"
#include "tsan_interface.h"
#include "tsan_interface_ann.h"
#include <libkern/OSAtomic.h>
#include <xpc/xpc.h>
typedef long long_t; // NOLINT
namespace __tsan {
#define OSATOMIC_INTERCEPTOR(return_t, t, tsan_t, f, tsan_atomic_f, mo) \
TSAN_INTERCEPTOR(return_t, f, t x, volatile t *ptr) { \
SCOPED_TSAN_INTERCEPTOR(f, x, ptr); \
return tsan_atomic_f((volatile tsan_t *)ptr, x, mo); \
}
#define OSATOMIC_INTERCEPTOR_PLUS_X(return_t, t, tsan_t, f, tsan_atomic_f, mo) \
TSAN_INTERCEPTOR(return_t, f, t x, volatile t *ptr) { \
SCOPED_TSAN_INTERCEPTOR(f, x, ptr); \
return tsan_atomic_f((volatile tsan_t *)ptr, x, mo) + x; \
}
#define OSATOMIC_INTERCEPTOR_PLUS_1(return_t, t, tsan_t, f, tsan_atomic_f, mo) \
TSAN_INTERCEPTOR(return_t, f, volatile t *ptr) { \
SCOPED_TSAN_INTERCEPTOR(f, ptr); \
return tsan_atomic_f((volatile tsan_t *)ptr, 1, mo) + 1; \
}
#define OSATOMIC_INTERCEPTOR_MINUS_1(return_t, t, tsan_t, f, tsan_atomic_f, \
mo) \
TSAN_INTERCEPTOR(return_t, f, volatile t *ptr) { \
SCOPED_TSAN_INTERCEPTOR(f, ptr); \
return tsan_atomic_f((volatile tsan_t *)ptr, 1, mo) - 1; \
}
#define OSATOMIC_INTERCEPTORS_ARITHMETIC(f, tsan_atomic_f, m) \
m(int32_t, int32_t, a32, f##32, __tsan_atomic32_##tsan_atomic_f, mo_relaxed) \
m(int32_t, int32_t, a32, f##32##Barrier, __tsan_atomic32_##tsan_atomic_f, \
mo_acq_rel) \
m(int64_t, int64_t, a64, f##64, __tsan_atomic64_##tsan_atomic_f, \
mo_relaxed) \
m(int64_t, int64_t, a64, f##64##Barrier, __tsan_atomic64_##tsan_atomic_f, \
mo_acq_rel)
#define OSATOMIC_INTERCEPTORS_BITWISE(f, tsan_atomic_f, m, m_orig) \
m(int32_t, uint32_t, a32, f##32, __tsan_atomic32_##tsan_atomic_f, \
mo_relaxed) \
m(int32_t, uint32_t, a32, f##32##Barrier, __tsan_atomic32_##tsan_atomic_f, \
mo_acq_rel) \
m_orig(int32_t, uint32_t, a32, f##32##Orig, __tsan_atomic32_##tsan_atomic_f, \
mo_relaxed) \
m_orig(int32_t, uint32_t, a32, f##32##OrigBarrier, \
__tsan_atomic32_##tsan_atomic_f, mo_acq_rel)
OSATOMIC_INTERCEPTORS_ARITHMETIC(OSAtomicAdd, fetch_add,
OSATOMIC_INTERCEPTOR_PLUS_X)
OSATOMIC_INTERCEPTORS_ARITHMETIC(OSAtomicIncrement, fetch_add,
OSATOMIC_INTERCEPTOR_PLUS_1)
OSATOMIC_INTERCEPTORS_ARITHMETIC(OSAtomicDecrement, fetch_sub,
OSATOMIC_INTERCEPTOR_MINUS_1)
OSATOMIC_INTERCEPTORS_BITWISE(OSAtomicOr, fetch_or, OSATOMIC_INTERCEPTOR_PLUS_X,
OSATOMIC_INTERCEPTOR)
OSATOMIC_INTERCEPTORS_BITWISE(OSAtomicAnd, fetch_and,
OSATOMIC_INTERCEPTOR_PLUS_X, OSATOMIC_INTERCEPTOR)
OSATOMIC_INTERCEPTORS_BITWISE(OSAtomicXor, fetch_xor,
OSATOMIC_INTERCEPTOR_PLUS_X, OSATOMIC_INTERCEPTOR)
#define OSATOMIC_INTERCEPTORS_CAS(f, tsan_atomic_f, tsan_t, t) \
TSAN_INTERCEPTOR(bool, f, t old_value, t new_value, t volatile *ptr) { \
SCOPED_TSAN_INTERCEPTOR(f, old_value, new_value, ptr); \
return tsan_atomic_f##_compare_exchange_strong( \
(tsan_t *)ptr, (tsan_t *)&old_value, (tsan_t)new_value, mo_relaxed, \
mo_relaxed); \
} \
\
TSAN_INTERCEPTOR(bool, f##Barrier, t old_value, t new_value, \
t volatile *ptr) { \
SCOPED_TSAN_INTERCEPTOR(f##Barrier, old_value, new_value, ptr); \
return tsan_atomic_f##_compare_exchange_strong( \
(tsan_t *)ptr, (tsan_t *)&old_value, (tsan_t)new_value, mo_acq_rel, \
mo_relaxed); \
}
OSATOMIC_INTERCEPTORS_CAS(OSAtomicCompareAndSwapInt, __tsan_atomic32, a32, int)
OSATOMIC_INTERCEPTORS_CAS(OSAtomicCompareAndSwapLong, __tsan_atomic64, a64,
long_t)
OSATOMIC_INTERCEPTORS_CAS(OSAtomicCompareAndSwapPtr, __tsan_atomic64, a64,
void *)
OSATOMIC_INTERCEPTORS_CAS(OSAtomicCompareAndSwap32, __tsan_atomic32, a32,
int32_t)
OSATOMIC_INTERCEPTORS_CAS(OSAtomicCompareAndSwap64, __tsan_atomic64, a64,
int64_t)
#define OSATOMIC_INTERCEPTOR_BITOP(f, op, m, mo) \
TSAN_INTERCEPTOR(bool, f, uint32_t n, volatile void *ptr) { \
SCOPED_TSAN_INTERCEPTOR(f, n, ptr); \
char *byte_ptr = ((char *)ptr) + (n >> 3); \
char bit_index = n & 7; \
char mask = m; \
char orig_byte = op((a8 *)byte_ptr, mask, mo); \
return orig_byte & mask; \
}
#define OSATOMIC_INTERCEPTORS_BITOP(f, op, m) \
OSATOMIC_INTERCEPTOR_BITOP(f, op, m, mo_relaxed) \
OSATOMIC_INTERCEPTOR_BITOP(f##Barrier, op, m, mo_acq_rel)
OSATOMIC_INTERCEPTORS_BITOP(OSAtomicTestAndSet, __tsan_atomic8_fetch_or,
0x80u >> bit_index)
OSATOMIC_INTERCEPTORS_BITOP(OSAtomicTestAndClear, __tsan_atomic8_fetch_and,
~(0x80u >> bit_index))
TSAN_INTERCEPTOR(void, OSAtomicEnqueue, OSQueueHead *list, void *item,
size_t offset) {
SCOPED_TSAN_INTERCEPTOR(OSAtomicEnqueue, list, item, offset);
__tsan_release(item);
REAL(OSAtomicEnqueue)(list, item, offset);
}
TSAN_INTERCEPTOR(void *, OSAtomicDequeue, OSQueueHead *list, size_t offset) {
SCOPED_TSAN_INTERCEPTOR(OSAtomicDequeue, list, offset);
void *item = REAL(OSAtomicDequeue)(list, offset);
if (item) __tsan_acquire(item);
return item;
}
// OSAtomicFifoEnqueue and OSAtomicFifoDequeue are only on OS X.
#if !SANITIZER_IOS
TSAN_INTERCEPTOR(void, OSAtomicFifoEnqueue, OSFifoQueueHead *list, void *item,
size_t offset) {
SCOPED_TSAN_INTERCEPTOR(OSAtomicFifoEnqueue, list, item, offset);
__tsan_release(item);
REAL(OSAtomicFifoEnqueue)(list, item, offset);
}
TSAN_INTERCEPTOR(void *, OSAtomicFifoDequeue, OSFifoQueueHead *list,
size_t offset) {
SCOPED_TSAN_INTERCEPTOR(OSAtomicFifoDequeue, list, offset);
void *item = REAL(OSAtomicFifoDequeue)(list, offset);
if (item) __tsan_acquire(item);
return item;
}
#endif
TSAN_INTERCEPTOR(void, OSSpinLockLock, volatile OSSpinLock *lock) {
CHECK(!cur_thread()->is_dead);
if (!cur_thread()->is_inited) {

48
compiler-rt/test/tsan/Darwin/osatomics-add.mm Normal file
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@ -0,0 +1,48 @@
// RUN: %clang_tsan %s -o %t -framework Foundation -std=c++11
// RUN: %run %t 2>&1 | FileCheck %s
#import <Foundation/Foundation.h>
#import <libkern/OSAtomic.h>
#include <thread>
volatile int64_t retainCount = 0;
long g = 0;
void dealloc() {
g = 42;
}
void release() {
if (OSAtomicAdd64Barrier(-1, &retainCount) == 0) {
dealloc();
}
}
void retain() {
OSAtomicAdd64Barrier(1, &retainCount);
}
int main(int argc, const char * argv[]) {
fprintf(stderr, "start\n");
retain();
retain();
std::thread t([]{
release();
});
g = 47;
release();
t.join();
fprintf(stderr, "end, g = %ld\n", g);
return 0;
}
// CHECK: start
// CHECK: end, g = 42
// CHECK-NOT: WARNING: ThreadSanitizer

43
compiler-rt/test/tsan/Darwin/osatomics-list.mm Normal file
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// RUN: %clang_tsan %s -o %t -framework Foundation -std=c++11
// RUN: %run %t 2>&1 | FileCheck %s
#import <Foundation/Foundation.h>
#import <libkern/OSAtomic.h>
#include <thread>
#include "../test.h"
typedef struct {
void *next;
long data;
} ListItem;
OSQueueHead q;
int main(int argc, const char *argv[]) {
barrier_init(&barrier, 2);
std::thread t1([] {
ListItem *li = new ListItem{nullptr, 42};
OSAtomicEnqueue(&q, li, 0);
barrier_wait(&barrier);
});
std::thread t2([] {
barrier_wait(&barrier);
ListItem *li = (ListItem *)OSAtomicDequeue(&q, 0);
fprintf(stderr, "data = %ld\n", li->data);
});
t1.join();
t2.join();
fprintf(stderr, "done\n");
return 0;
}
// CHECK: data = 42
// CHECK: done
// CHECK-NOT: WARNING: ThreadSanitizer