forked from OSchip/llvm-project
54 lines
1.3 KiB
C++
54 lines
1.3 KiB
C++
// RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
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#include <pthread.h>
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#include <stdio.h>
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#include <unistd.h>
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int Global;
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void __attribute__((noinline)) foo1() {
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Global = 42;
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}
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void __attribute__((noinline)) bar1() {
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volatile int tmp = 42;
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int tmp2 = tmp;
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(void)tmp2;
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foo1();
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}
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void __attribute__((noinline)) foo2() {
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volatile int tmp = Global;
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int tmp2 = tmp;
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(void)tmp2;
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}
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void __attribute__((noinline)) bar2() {
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volatile int tmp = 42;
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int tmp2 = tmp;
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(void)tmp2;
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foo2();
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}
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void *Thread1(void *x) {
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sleep(1);
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bar1();
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return NULL;
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}
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int main() {
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pthread_t t;
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pthread_create(&t, NULL, Thread1, NULL);
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bar2();
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pthread_join(t, NULL);
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}
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// CHECK: WARNING: ThreadSanitizer: data race
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// CHECK-NEXT: Write of size 4 at {{.*}} by thread T1:
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// CHECK-NEXT: #0 foo1{{.*}} {{.*}}simple_stack2.cc:9{{(:3)?}} ({{.*}})
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// CHECK-NEXT: #1 bar1{{.*}} {{.*}}simple_stack2.cc:16{{(:3)?}} ({{.*}})
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// CHECK-NEXT: #2 Thread1{{.*}} {{.*}}simple_stack2.cc:34{{(:3)?}} ({{.*}})
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// CHECK: Previous read of size 4 at {{.*}} by main thread:
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// CHECK-NEXT: #0 foo2{{.*}} {{.*}}simple_stack2.cc:20{{(:28)?}} ({{.*}})
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// CHECK-NEXT: #1 bar2{{.*}} {{.*}}simple_stack2.cc:29{{(:3)?}} ({{.*}})
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// CHECK-NEXT: #2 main{{.*}} {{.*}}simple_stack2.cc:41{{(:3)?}} ({{.*}})
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