1 // RUN: rm -rf %t-dir 2 // RUN: mkdir %t-dir 3 4 // RUN: %clangxx_tsan -O1 -fno-builtin %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 45 void *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 57 int 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