[llvm-commits] [compiler-rt] r170207 - /compiler-rt/trunk/lib/tsan/lit_tests/signal_errno.cc
Dmitry Vyukov
dvyukov at google.com
Fri Dec 14 06:42:40 PST 2012
Author: dvyukov
Date: Fri Dec 14 08:42:40 2012
New Revision: 170207
URL: http://llvm.org/viewvc/llvm-project?rev=170207&view=rev
Log:
tsan: add test for errno spoiling in signal handler
Added:
compiler-rt/trunk/lib/tsan/lit_tests/signal_errno.cc
Added: compiler-rt/trunk/lib/tsan/lit_tests/signal_errno.cc
URL: http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/tsan/lit_tests/signal_errno.cc?rev=170207&view=auto
==============================================================================
--- compiler-rt/trunk/lib/tsan/lit_tests/signal_errno.cc (added)
+++ compiler-rt/trunk/lib/tsan/lit_tests/signal_errno.cc Fri Dec 14 08:42:40 2012
@@ -0,0 +1,42 @@
+// RUN: %clang_tsan -O1 %s -o %t && %t 2>&1 | FileCheck %s
+#include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <signal.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <errno.h>
+
+pthread_t mainth;
+volatile int done;
+
+static void handler(int, siginfo_t*, void*) {
+ errno = 1;
+ done = 1;
+}
+
+static void* sendsignal(void*) {
+ pthread_kill(mainth, SIGPROF);
+ return 0;
+}
+
+int main() {
+ mainth = pthread_self();
+ struct sigaction act = {};
+ act.sa_sigaction = &handler;
+ sigaction(SIGPROF, &act, 0);
+ pthread_t th;
+ pthread_create(&th, 0, sendsignal, 0);
+ while (done == 0) {
+ volatile char *p = (char*)malloc(1);
+ p[0] = 0;
+ free((void*)p);
+ pthread_yield();
+ }
+ pthread_join(th, 0);
+ return 0;
+}
+
+// CHECK: WARNING: ThreadSanitizer: signal handler spoils errno
+// CHECK: #0 handler(int, siginfo*, void*) {{.*}}signal_errno.cc
+
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