1// RUN: rm -rf %t-dir
2// RUN: mkdir %t-dir
3
4// RUN: %clangxx_tsan -O1 %s -DLIB -fPIC -fno-sanitize=thread -shared -o %t-dir/libignore_lib1.so
5// RUN: %clangxx_tsan -O1 %s %link_libcxx_tsan -o %t-dir/executable
6// RUN: echo running w/o suppressions:
7// RUN: %deflake %run %t-dir/executable | FileCheck %s --check-prefix=CHECK-NOSUPP
8// RUN: echo running with suppressions:
9// RUN: %env_tsan_opts=suppressions='%s.supp' %run %t-dir/executable 2>&1 | FileCheck %s --check-prefix=CHECK-WITHSUPP
10
11// REQUIRES: stable-runtime
12// UNSUPPORTED: powerpc64le
13// FIXME: This test occasionally fails on powerpc64 LE possibly starting with
14// r279664. Re-enable the test once the problem(s) have been fixed.
15
16// Previously the test episodically failed with:
17// ThreadSanitizer: called_from_lib suppression '/libignore_lib1.so$' is
18// matched against 2 libraries: '/libignore_lib1.so' and '/libignore_lib1.so'
19// This was caused by non-atomicity of reading of /proc/self/maps.
20
21// ReadProcMaps() on NetBSD does not handle >=1MB of memory layout information
22// UNSUPPORTED: netbsd
23
24#ifndef LIB
25
26#include <dlfcn.h>
27#include <sys/mman.h>
28#include <stdlib.h>
29#include <stdio.h>
30#include <errno.h>
31#include <libgen.h>
32#include <string>
33#include "test.h"
34
35#ifndef MAP_32BIT
36# define MAP_32BIT 0
37#endif
38
39#ifdef __APPLE__
40# define TSAN_MAP_ANON MAP_ANON
41#else
42# define TSAN_MAP_ANON MAP_ANONYMOUS
43#endif
44
45void *thr(void *arg) {
46 // This thread creates lots of separate mappings in /proc/self/maps before
47 // the ignored library.
48 for (int i = 0; i < 10000; i++) {
49 if (i == 5000)
50 barrier_wait(&barrier);
51 mmap(0, 4096, PROT_READ, TSAN_MAP_ANON | MAP_PRIVATE | MAP_32BIT, -1 , 0);
52 mmap(0, 4096, PROT_WRITE, TSAN_MAP_ANON | MAP_PRIVATE | MAP_32BIT, -1 , 0);
53 }
54 return 0;
55}
56
57int main(int argc, char **argv) {
58 barrier_init(&barrier, 2);
59 pthread_t th;
60 pthread_create(&th, 0, thr, 0);
61 barrier_wait(&barrier);
62 std::string lib = std::string(dirname(argv[0])) + "/libignore_lib1.so";
63 void *h = dlopen(lib.c_str(), RTLD_GLOBAL | RTLD_NOW);
64 if (h == 0)
65 exit(printf("failed to load the library (%d)\n", errno));
66 void (*f)() = (void(*)())dlsym(h, "libfunc");
67 if (f == 0)
68 exit(printf("failed to find the func (%d)\n", errno));
69 pthread_join(th, 0);
70 f();
71}
72
73#else // #ifdef LIB
74
75#include "ignore_lib_lib.h"
76
77#endif // #ifdef LIB
78
79// CHECK-NOSUPP: WARNING: ThreadSanitizer: data race
80// CHECK-NOSUPP: OK
81
82// CHECK-WITHSUPP-NOT: WARNING: ThreadSanitizer: data race
83// CHECK-WITHSUPP: OK
84