forked from OSchip/llvm-project
76 lines
2.1 KiB
C++
76 lines
2.1 KiB
C++
// RUN: %clangxx_tsan -O1 %s -DLIB -fPIC -fno-sanitize=thread -shared -o %T/libignore_lib1.so
|
|
// RUN: %clangxx_tsan -O1 %s -o %t
|
|
// RUN: echo running w/o suppressions:
|
|
// RUN: %deflake %run %t | FileCheck %s --check-prefix=CHECK-NOSUPP
|
|
// RUN: echo running with suppressions:
|
|
// RUN: %env_tsan_opts=suppressions='%s.supp' %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-WITHSUPP
|
|
|
|
// REQUIRES: stable-runtime
|
|
|
|
// Previously the test episodically failed with:
|
|
// ThreadSanitizer: called_from_lib suppression '/libignore_lib1.so$' is
|
|
// matched against 2 libraries: '/libignore_lib1.so' and '/libignore_lib1.so'
|
|
// This was caused by non-atomicity of reading of /proc/self/maps.
|
|
|
|
#ifndef LIB
|
|
|
|
#include <dlfcn.h>
|
|
#include <sys/mman.h>
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <errno.h>
|
|
#include <libgen.h>
|
|
#include <string>
|
|
#include "test.h"
|
|
|
|
#ifndef MAP_32BIT
|
|
# define MAP_32BIT 0
|
|
#endif
|
|
|
|
#ifdef __APPLE__
|
|
# define TSAN_MAP_ANON MAP_ANON
|
|
#else
|
|
# define TSAN_MAP_ANON MAP_ANONYMOUS
|
|
#endif
|
|
|
|
void *thr(void *arg) {
|
|
// This thread creates lots of separate mappings in /proc/self/maps before
|
|
// the ignored library.
|
|
for (int i = 0; i < 10000; i++) {
|
|
if (i == 5000)
|
|
barrier_wait(&barrier);
|
|
mmap(0, 4096, PROT_READ, TSAN_MAP_ANON | MAP_PRIVATE | MAP_32BIT, -1 , 0);
|
|
mmap(0, 4096, PROT_WRITE, TSAN_MAP_ANON | MAP_PRIVATE | MAP_32BIT, -1 , 0);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int main(int argc, char **argv) {
|
|
barrier_init(&barrier, 2);
|
|
pthread_t th;
|
|
pthread_create(&th, 0, thr, 0);
|
|
barrier_wait(&barrier);
|
|
std::string lib = std::string(dirname(argv[0])) + "/libignore_lib1.so";
|
|
void *h = dlopen(lib.c_str(), RTLD_GLOBAL | RTLD_NOW);
|
|
if (h == 0)
|
|
exit(printf("failed to load the library (%d)\n", errno));
|
|
void (*f)() = (void(*)())dlsym(h, "libfunc");
|
|
if (f == 0)
|
|
exit(printf("failed to find the func (%d)\n", errno));
|
|
pthread_join(th, 0);
|
|
f();
|
|
}
|
|
|
|
#else // #ifdef LIB
|
|
|
|
#include "ignore_lib_lib.h"
|
|
|
|
#endif // #ifdef LIB
|
|
|
|
// CHECK-NOSUPP: WARNING: ThreadSanitizer: data race
|
|
// CHECK-NOSUPP: OK
|
|
|
|
// CHECK-WITHSUPP-NOT: WARNING: ThreadSanitizer: data race
|
|
// CHECK-WITHSUPP: OK
|
|
|