53 lines · cpp
1// RUN: %clang_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s2// This test fails on powerpc64 BE (VMA=44), it does not appear to be3// a functional problem, but the Tsan report is missing some info.4// XFAIL: target=powerpc64-unknown-linux-gnu{{.*}}5 6#include "test.h"7#include <signal.h>8#include <sys/types.h>9#include <errno.h>10 11pthread_t mainth;12volatile int done;13 14static void MyHandler(int, siginfo_t *s, void *c) {15 errno = 1;16 done = 1;17}18 19static void* sendsignal(void *p) {20 barrier_wait(&barrier);21 pthread_kill(mainth, SIGPROF);22 return 0;23}24 25static __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 35int 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 errno49// CHECK: Signal 27 handler invoked at:50// CHECK: #0 MyHandler(int, {{(__)?}}siginfo{{(_t)?}}*, void*) {{.*}}signal_errno.cpp51// CHECK: main52// CHECK: SUMMARY: ThreadSanitizer: signal handler spoils errno{{.*}}MyHandler53