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 14 static void MyHandler(int, siginfo_t *s, void *c) { 15 errno = 1; 16 done = 1; 17 } 18 19 static void* sendsignal(void *p) { 20 barrier_wait(&barrier); 21 pthread_kill(mainth, SIGPROF); 22 return 0; 23 } 24 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 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.cc 50 // CHECK: main 51 // CHECK: SUMMARY: ThreadSanitizer: signal handler spoils errno{{.*}}MyHandler 52 53
