1 // RUN: %clang_tsan -O1 %s -o %t && %t 2>&1 | FileCheck %s 2 #include <pthread.h> 3 #include <stdio.h> 4 #include <stdlib.h> 5 #include <signal.h> 6 #include <sys/types.h> 7 #include <unistd.h> 8 #include <errno.h> 9 10 pthread_t mainth; 11 volatile int done; 12 13 static void MyHandler(int, siginfo_t *s, void *c) { 14 errno = 1; 15 done = 1; 16 } 17 18 static void* sendsignal(void *p) { 19 pthread_kill(mainth, SIGPROF); 20 return 0; 21 } 22 23 int main() { 24 mainth = pthread_self(); 25 struct sigaction act = {}; 26 act.sa_sigaction = &MyHandler; 27 sigaction(SIGPROF, &act, 0); 28 pthread_t th; 29 pthread_create(&th, 0, sendsignal, 0); 30 while (done == 0) { 31 volatile char *p = (char*)malloc(1); 32 p[0] = 0; 33 free((void*)p); 34 pthread_yield(); 35 } 36 pthread_join(th, 0); 37 return 0; 38 } 39 40 // CHECK: WARNING: ThreadSanitizer: signal handler spoils errno 41 // CHECK: #0 MyHandler(int, siginfo{{(_t)?}}*, void*) {{.*}}signal_errno.cc 42 // CHECK: SUMMARY: ThreadSanitizer: signal handler spoils errno{{.*}}MyHandler 43 44
