1 // RUN: %clang_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
2 // This test fails on powerpc64 BE (VMA=44), it does not appear to be
3 // a functional problem, but the Tsan report is missing some info.
4 // XFAIL: powerpc64-unknown-linux-gnu
5
6 #include "test.h"
7 #include <signal.h>
8 #include <sys/types.h>
9 #include <errno.h>
10
11 pthread_t mainth;
12 volatile int done;
13
MyHandler(int,siginfo_t * s,void * c)14 static void MyHandler(int, siginfo_t *s, void *c) {
15 errno = 1;
16 done = 1;
17 }
18
sendsignal(void * p)19 static void* sendsignal(void *p) {
20 barrier_wait(&barrier);
21 pthread_kill(mainth, SIGPROF);
22 return 0;
23 }
24
loop()25 static __attribute__((noinline)) void loop() {
26 barrier_wait(&barrier);
27 while (done == 0) {
28 volatile char *p = (char*)malloc(1);
29 p[0] = 0;
30 free((void*)p);
31 sched_yield();
32 }
33 }
34
main()35 int main() {
36 barrier_init(&barrier, 2);
37 mainth = pthread_self();
38 struct sigaction act = {};
39 act.sa_sigaction = &MyHandler;
40 sigaction(SIGPROF, &act, 0);
41 pthread_t th;
42 pthread_create(&th, 0, sendsignal, 0);
43 loop();
44 pthread_join(th, 0);
45 return 0;
46 }
47
48 // CHECK: WARNING: ThreadSanitizer: signal handler spoils errno
49 // CHECK: #0 MyHandler(int, {{(__)?}}siginfo{{(_t)?}}*, void*) {{.*}}signal_errno.cpp
50 // CHECK: main
51 // CHECK: SUMMARY: ThreadSanitizer: signal handler spoils errno{{.*}}MyHandler
52
53