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llvm-project/compiler-rt/lib/tsan/tests/unit/tsan_trace_test.cpp

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//===-- tsan_trace_test.cpp -----------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file is a part of ThreadSanitizer (TSan), a race detector.
//
//===----------------------------------------------------------------------===//
#include "tsan_trace.h"
#include <pthread.h>
#include "gtest/gtest.h"
#include "tsan_rtl.h"
namespace __tsan {
using namespace v3;
// We need to run all trace tests in a new thread,
// so that the thread trace is empty initially.
static void run_in_thread(void *(*f)(void *), void *arg = nullptr) {
pthread_t th;
pthread_create(&th, nullptr, f, arg);
pthread_join(th, nullptr);
}
#if SANITIZER_MAC
// These tests are currently failing on Mac.
// See https://reviews.llvm.org/D107911 for more details.
# define MAYBE_RestoreAccess DISABLED_RestoreAccess
# define MAYBE_MemoryAccessSize DISABLED_MemoryAccessSize
# define MAYBE_RestoreMutexLock DISABLED_RestoreMutexLock
# define MAYBE_MultiPart DISABLED_MultiPart
#else
# define MAYBE_RestoreAccess RestoreAccess
# define MAYBE_MemoryAccessSize MemoryAccessSize
# define MAYBE_RestoreMutexLock RestoreMutexLock
# define MAYBE_MultiPart MultiPart
#endif
TEST(Trace, MAYBE_RestoreAccess) {
struct Thread {
static void *Func(void *arg) {
// A basic test with some function entry/exit events,
// some mutex lock/unlock events and some other distracting
// memory events.
ThreadState *thr = cur_thread();
TraceFunc(thr, 0x1000);
TraceFunc(thr, 0x1001);
TraceMutexLock(thr, v3::EventType::kLock, 0x4000, 0x5000, 0x6000);
TraceMutexLock(thr, v3::EventType::kLock, 0x4001, 0x5001, 0x6001);
TraceMutexUnlock(thr, 0x5000);
TraceFunc(thr);
CHECK(TryTraceMemoryAccess(thr, 0x2001, 0x3001, 8, kAccessRead));
TraceMutexLock(thr, v3::EventType::kRLock, 0x4002, 0x5002, 0x6002);
TraceFunc(thr, 0x1002);
CHECK(TryTraceMemoryAccess(thr, 0x2000, 0x3000, 8, kAccessRead));
// This is the access we want to find.
// The previous one is equivalent, but RestoreStack must prefer
// the last of the matchig accesses.
CHECK(TryTraceMemoryAccess(thr, 0x2002, 0x3000, 8, kAccessRead));
Lock lock1(&ctx->slot_mtx);
ThreadRegistryLock lock2(&ctx->thread_registry);
VarSizeStackTrace stk;
MutexSet mset;
uptr tag = kExternalTagNone;
bool res =
RestoreStack(thr->tid, v3::EventType::kAccessExt, thr->sid,
thr->epoch, 0x3000, 8, kAccessRead, &stk, &mset, &tag);
CHECK(res);
CHECK_EQ(stk.size, 3);
CHECK_EQ(stk.trace[0], 0x1000);
CHECK_EQ(stk.trace[1], 0x1002);
CHECK_EQ(stk.trace[2], 0x2002);
CHECK_EQ(mset.Size(), 2);
CHECK_EQ(mset.Get(0).addr, 0x5001);
CHECK_EQ(mset.Get(0).stack_id, 0x6001);
CHECK_EQ(mset.Get(0).write, true);
CHECK_EQ(mset.Get(1).addr, 0x5002);
CHECK_EQ(mset.Get(1).stack_id, 0x6002);
CHECK_EQ(mset.Get(1).write, false);
CHECK_EQ(tag, kExternalTagNone);
return nullptr;
}
};
run_in_thread(Thread::Func);
}
TEST(Trace, MAYBE_MemoryAccessSize) {
struct Thread {
struct Params {
uptr access_size, offset, size;
bool res;
int type;
};
static void *Func(void *arg) {
// Test tracing and matching of accesses of different sizes.
const Params *params = static_cast<Params *>(arg);
Printf("access_size=%zu, offset=%zu, size=%zu, res=%d, type=%d\n",
params->access_size, params->offset, params->size, params->res,
params->type);
ThreadState *thr = cur_thread();
TraceFunc(thr, 0x1000);
switch (params->type) {
case 0:
// This should emit compressed event.
CHECK(TryTraceMemoryAccess(thr, 0x2000, 0x3000, params->access_size,
kAccessRead));
break;
case 1:
// This should emit full event.
CHECK(TryTraceMemoryAccess(thr, 0x2000000, 0x3000,
params->access_size, kAccessRead));
break;
case 2:
TraceMemoryAccessRange(thr, 0x2000000, 0x3000, params->access_size,
kAccessRead);
break;
}
Lock lock1(&ctx->slot_mtx);
ThreadRegistryLock lock2(&ctx->thread_registry);
VarSizeStackTrace stk;
MutexSet mset;
uptr tag = kExternalTagNone;
bool res = RestoreStack(thr->tid, v3::EventType::kAccessExt, thr->sid,
thr->epoch, 0x3000 + params->offset, params->size,
kAccessRead, &stk, &mset, &tag);
CHECK_EQ(res, params->res);
if (params->res) {
CHECK_EQ(stk.size, 2);
CHECK_EQ(stk.trace[0], 0x1000);
CHECK_EQ(stk.trace[1], params->type ? 0x2000000 : 0x2000);
}
return nullptr;
}
};
Thread::Params tests[] = {
{1, 0, 1, true, 0}, {4, 0, 2, true, 0},
{4, 2, 2, true, 0}, {8, 3, 1, true, 0},
{2, 1, 1, true, 0}, {1, 1, 1, false, 0},
{8, 5, 4, false, 0}, {4, static_cast<uptr>(-1l), 4, false, 0},
};
for (auto params : tests) {
for (params.type = 0; params.type < 3; params.type++)
run_in_thread(Thread::Func, &params);
}
}
TEST(Trace, MAYBE_RestoreMutexLock) {
struct Thread {
static void *Func(void *arg) {
// Check of restoration of a mutex lock event.
ThreadState *thr = cur_thread();
TraceFunc(thr, 0x1000);
TraceMutexLock(thr, v3::EventType::kLock, 0x4000, 0x5000, 0x6000);
TraceMutexLock(thr, v3::EventType::kRLock, 0x4001, 0x5001, 0x6001);
TraceMutexLock(thr, v3::EventType::kRLock, 0x4002, 0x5001, 0x6002);
Lock lock1(&ctx->slot_mtx);
ThreadRegistryLock lock2(&ctx->thread_registry);
VarSizeStackTrace stk;
MutexSet mset;
uptr tag = kExternalTagNone;
bool res = RestoreStack(thr->tid, v3::EventType::kLock, thr->sid,
thr->epoch, 0x5001, 0, 0, &stk, &mset, &tag);
CHECK(res);
CHECK_EQ(stk.size, 2);
CHECK_EQ(stk.trace[0], 0x1000);
CHECK_EQ(stk.trace[1], 0x4002);
CHECK_EQ(mset.Size(), 2);
CHECK_EQ(mset.Get(0).addr, 0x5000);
CHECK_EQ(mset.Get(0).stack_id, 0x6000);
CHECK_EQ(mset.Get(0).write, true);
CHECK_EQ(mset.Get(1).addr, 0x5001);
CHECK_EQ(mset.Get(1).stack_id, 0x6001);
CHECK_EQ(mset.Get(1).write, false);
return nullptr;
}
};
run_in_thread(Thread::Func);
}
TEST(Trace, MAYBE_MultiPart) {
struct Thread {
static void *Func(void *arg) {
// Check replay of a trace with multiple parts.
ThreadState *thr = cur_thread();
TraceFunc(thr, 0x1000);
TraceFunc(thr, 0x2000);
TraceMutexLock(thr, v3::EventType::kLock, 0x4000, 0x5000, 0x6000);
const uptr kEvents = 3 * sizeof(TracePart) / sizeof(v3::Event);
for (uptr i = 0; i < kEvents; i++) {
TraceFunc(thr, 0x3000);
TraceMutexLock(thr, v3::EventType::kLock, 0x4002, 0x5002, 0x6002);
TraceMutexUnlock(thr, 0x5002);
TraceFunc(thr);
}
TraceFunc(thr, 0x4000);
TraceMutexLock(thr, v3::EventType::kRLock, 0x4001, 0x5001, 0x6001);
CHECK(TryTraceMemoryAccess(thr, 0x2002, 0x3000, 8, kAccessRead));
Lock lock1(&ctx->slot_mtx);
ThreadRegistryLock lock2(&ctx->thread_registry);
VarSizeStackTrace stk;
MutexSet mset;
uptr tag = kExternalTagNone;
bool res =
RestoreStack(thr->tid, v3::EventType::kAccessExt, thr->sid,
thr->epoch, 0x3000, 8, kAccessRead, &stk, &mset, &tag);
CHECK(res);
CHECK_EQ(stk.size, 4);
CHECK_EQ(stk.trace[0], 0x1000);
CHECK_EQ(stk.trace[1], 0x2000);
CHECK_EQ(stk.trace[2], 0x4000);
CHECK_EQ(stk.trace[3], 0x2002);
CHECK_EQ(mset.Size(), 2);
CHECK_EQ(mset.Get(0).addr, 0x5000);
CHECK_EQ(mset.Get(0).stack_id, 0x6000);
CHECK_EQ(mset.Get(0).write, true);
CHECK_EQ(mset.Get(1).addr, 0x5001);
CHECK_EQ(mset.Get(1).stack_id, 0x6001);
CHECK_EQ(mset.Get(1).write, false);
return nullptr;
}
};
run_in_thread(Thread::Func);
}
} // namespace __tsan
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