1 // RUN: rm -rf %t-dir
2 // RUN: mkdir %t-dir
3 // RUN: %clangxx_tsan -O1 %s -DLIB -fPIC -fno-sanitize=thread -shared -o %t-dir/libignore_lib.so
4 // RUN: %clangxx_tsan -O1 %s %link_libcxx_tsan -o %t-dir/executable
5 // RUN: %env_tsan_opts=suppressions='%s.supp' %run %t-dir/executable 2>&1 | FileCheck %s
6
7 // Copied from ignore_lib5.cpp:
8 // REQUIRES: stable-runtime
9 // UNSUPPORTED: powerpc64le
10 // UNSUPPORTED: netbsd
11
12 // Test that pthread_detach works in libraries ignored by called_from_lib.
13 // For more context see:
14 // https://groups.google.com/forum/#!topic/thread-sanitizer/ecH2P0QUqPs
15
16 #include "test.h"
17 #include <dlfcn.h>
18 #include <errno.h>
19 #include <libgen.h>
20 #include <stdio.h>
21 #include <stdlib.h>
22 #include <string>
23 #include <sys/mman.h>
24
25 #ifndef LIB
26
thr(void * arg)27 void *thr(void *arg) {
28 *(volatile long long *)arg = 1;
29 return 0;
30 }
31
main(int argc,char ** argv)32 int main(int argc, char **argv) {
33 std::string lib = std::string(dirname(argv[0])) + "/libignore_lib.so";
34 void *h = dlopen(lib.c_str(), RTLD_GLOBAL | RTLD_NOW);
35 if (h == 0)
36 exit(printf("failed to load the library (%d)\n", errno));
37 void (*libfunc)() = (void (*)())dlsym(h, "libfunc");
38 if (libfunc == 0)
39 exit(printf("failed to find the func (%d)\n", errno));
40 libfunc();
41
42 const int kThreads = 10;
43 pthread_t t[kThreads];
44 volatile long long data[kThreads];
45 for (int i = 0; i < kThreads; i++)
46 pthread_create(&t[i], 0, thr, (void *)&data[i]);
47 for (int i = 0; i < kThreads; i++) {
48 pthread_join(t[i], 0);
49 data[i] = 2;
50 }
51 fprintf(stderr, "DONE\n");
52 }
53
54 // CHECK-NOT: WARNING: ThreadSanitizer:
55 // CHECK: DONE
56 // CHECK-NOT: WARNING: ThreadSanitizer:
57
58 #else // #ifdef LIB
59
thr(void * p)60 void *thr(void *p) {
61 sleep(1);
62 pthread_detach(pthread_self());
63 return 0;
64 }
65
libfunc()66 extern "C" void libfunc() {
67 const int kThreads = 10;
68 pthread_t t[kThreads];
69 for (int i = 0; i < kThreads; i++)
70 pthread_create(&t[i], 0, thr, 0);
71 sleep(2);
72 }
73
74 #endif // #ifdef LIB
75