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| //===-- tsan_mop.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_interface.h"
#include "tsan_test_util.h"
#include "gtest/gtest.h"
#include <stddef.h>
#include <stdint.h>
TEST(ThreadSanitizer, SimpleWrite) {
ScopedThread t;
MemLoc l;
t.Write1(l);
}
TEST(ThreadSanitizer, SimpleWriteWrite) {
ScopedThread t1, t2;
MemLoc l1, l2;
t1.Write1(l1);
t2.Write1(l2);
}
TEST(ThreadSanitizer, WriteWriteRace) {
ScopedThread t1, t2;
MemLoc l;
t1.Write1(l);
t2.Write1(l, true);
}
TEST(ThreadSanitizer, ReadWriteRace) {
ScopedThread t1, t2;
MemLoc l;
t1.Read1(l);
t2.Write1(l, true);
}
TEST(ThreadSanitizer, WriteReadRace) {
ScopedThread t1, t2;
MemLoc l;
t1.Write1(l);
t2.Read1(l, true);
}
TEST(ThreadSanitizer, ReadReadNoRace) {
ScopedThread t1, t2;
MemLoc l;
t1.Read1(l);
t2.Read1(l);
}
TEST(ThreadSanitizer, WriteThenRead) {
MemLoc l;
ScopedThread t1, t2;
t1.Write1(l);
t1.Read1(l);
t2.Read1(l, true);
}
TEST(ThreadSanitizer, WriteThenLockedRead) {
Mutex m(Mutex::RW);
MainThread t0;
t0.Create(m);
MemLoc l;
{
ScopedThread t1, t2;
t1.Write8(l);
t1.Lock(m);
t1.Read8(l);
t1.Unlock(m);
t2.Read8(l, true);
}
t0.Destroy(m);
}
TEST(ThreadSanitizer, LockedWriteThenRead) {
Mutex m(Mutex::RW);
MainThread t0;
t0.Create(m);
MemLoc l;
{
ScopedThread t1, t2;
t1.Lock(m);
t1.Write8(l);
t1.Unlock(m);
t1.Read8(l);
t2.Read8(l, true);
}
t0.Destroy(m);
}
TEST(ThreadSanitizer, RaceWithOffset) {
ScopedThread t1, t2;
{
MemLoc l;
t1.Access(l.loc(), true, 8, false);
t2.Access((char*)l.loc() + 4, true, 4, true);
}
{
MemLoc l;
t1.Access(l.loc(), true, 8, false);
t2.Access((char*)l.loc() + 7, true, 1, true);
}
{
MemLoc l;
t1.Access((char*)l.loc() + 4, true, 4, false);
t2.Access((char*)l.loc() + 4, true, 2, true);
}
{
MemLoc l;
t1.Access((char*)l.loc() + 4, true, 4, false);
t2.Access((char*)l.loc() + 6, true, 2, true);
}
{
MemLoc l;
t1.Access((char*)l.loc() + 3, true, 2, false);
t2.Access((char*)l.loc() + 4, true, 1, true);
}
{
MemLoc l;
t1.Access((char*)l.loc() + 1, true, 8, false);
t2.Access((char*)l.loc() + 3, true, 1, true);
}
}
TEST(ThreadSanitizer, RaceWithOffset2) {
ScopedThread t1, t2;
{
MemLoc l;
t1.Access((char*)l.loc(), true, 4, false);
t2.Access((char*)l.loc() + 2, true, 1, true);
}
{
MemLoc l;
t1.Access((char*)l.loc() + 2, true, 1, false);
t2.Access((char*)l.loc(), true, 4, true);
}
}
TEST(ThreadSanitizer, NoRaceWithOffset) {
ScopedThread t1, t2;
{
MemLoc l;
t1.Access(l.loc(), true, 4, false);
t2.Access((char*)l.loc() + 4, true, 4, false);
}
{
MemLoc l;
t1.Access((char*)l.loc() + 3, true, 2, false);
t2.Access((char*)l.loc() + 1, true, 2, false);
t2.Access((char*)l.loc() + 5, true, 2, false);
}
}
TEST(ThreadSanitizer, RaceWithDeadThread) {
MemLoc l;
ScopedThread t;
ScopedThread().Write1(l);
t.Write1(l, true);
}
TEST(ThreadSanitizer, BenignRaceOnVptr) {
void *vptr_storage;
MemLoc vptr(&vptr_storage), val;
vptr_storage = val.loc();
ScopedThread t1, t2;
t1.VptrUpdate(vptr, val);
t2.Read8(vptr);
}
TEST(ThreadSanitizer, HarmfulRaceOnVptr) {
void *vptr_storage;
MemLoc vptr(&vptr_storage), val1, val2;
vptr_storage = val1.loc();
ScopedThread t1, t2;
t1.VptrUpdate(vptr, val2);
t2.Read8(vptr, true);
}
static void foo() {
volatile int x = 42;
int x2 = x;
(void)x2;
}
static void bar() {
volatile int x = 43;
int x2 = x;
(void)x2;
}
TEST(ThreadSanitizer, ReportDeadThread) {
MemLoc l;
ScopedThread t1;
{
ScopedThread t2;
t2.Call(&foo);
t2.Call(&bar);
t2.Write1(l);
}
t1.Write1(l, true);
}
struct ClassWithStatic {
static int Data[4];
};
int ClassWithStatic::Data[4];
static void foobarbaz() {}
TEST(ThreadSanitizer, ReportRace) {
ScopedThread t1;
MainThread().Access(&ClassWithStatic::Data, true, 4, false);
t1.Call(&foobarbaz);
t1.Access(&ClassWithStatic::Data, true, 2, true);
t1.Return();
}
|