67 lines
2.0 KiB
C
67 lines
2.0 KiB
C
// RUN: %clang_tsan -O1 %s -o %t && %t 2>&1 | 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; (void)tmp;
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foo1();
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}
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void __attribute__((noinline)) foo2() {
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volatile int v = Global; (void)v;
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}
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void __attribute__((noinline)) bar2() {
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volatile int tmp = 42; (void)tmp;
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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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void *Thread2(void *x) {
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bar2();
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return NULL;
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}
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void StartThread(pthread_t *t, void *(*f)(void*)) {
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pthread_create(t, NULL, f, NULL);
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}
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int main() {
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pthread_t t[2];
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StartThread(&t[0], Thread1);
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StartThread(&t[1], Thread2);
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pthread_join(t[0], NULL);
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pthread_join(t[1], NULL);
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return 0;
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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_stack.c:9{{(:3)?}} ({{.*}})
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// CHECK-NEXT: #1 bar1{{.*}} {{.*}}simple_stack.c:14{{(:3)?}} ({{.*}})
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// CHECK-NEXT: #2 Thread1{{.*}} {{.*}}simple_stack.c:28{{(:3)?}} ({{.*}})
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// CHECK: Previous read of size 4 at {{.*}} by thread T2:
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// CHECK-NEXT: #0 foo2{{.*}} {{.*}}simple_stack.c:18{{(:26)?}} ({{.*}})
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// CHECK-NEXT: #1 bar2{{.*}} {{.*}}simple_stack.c:23{{(:3)?}} ({{.*}})
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// CHECK-NEXT: #2 Thread2{{.*}} {{.*}}simple_stack.c:33{{(:3)?}} ({{.*}})
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// CHECK: Thread T1 (tid={{.*}}, running) created by main thread at:
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// CHECK-NEXT: #0 pthread_create {{.*}} ({{.*}})
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// CHECK-NEXT: #1 StartThread{{.*}} {{.*}}simple_stack.c:38{{(:3)?}} ({{.*}})
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// CHECK-NEXT: #2 main{{.*}} {{.*}}simple_stack.c:43{{(:3)?}} ({{.*}})
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// CHECK: Thread T2 ({{.*}}) created by main thread at:
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// CHECK-NEXT: #0 pthread_create {{.*}} ({{.*}})
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// CHECK-NEXT: #1 StartThread{{.*}} {{.*}}simple_stack.c:38{{(:3)?}} ({{.*}})
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// CHECK-NEXT: #2 main{{.*}} {{.*}}simple_stack.c:44{{(:3)?}} ({{.*}})
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