| // Test that ASan doesn't deadlock in __interceptor_pthread_create called |
| // from dlopened shared library constructor. The deadlock happens only in shared |
| // ASan runtime with recent Glibc (2.23 fits) when __interceptor_pthread_create |
| // grabs global Glibc's GL(dl_load_lock) and waits for tls_get_addr_tail that |
| // also tries to acquire it. |
| // |
| // RUN: %clangxx_asan -DBUILD_SO=1 -fPIC -shared %s -o %t-so.so |
| // RUN: %clangxx_asan %s -o %t |
| // RUN: %run %t 2>&1 |
| |
| // dlopen() can not be intercepted on Android |
| // UNSUPPORTED: android |
| // REQUIRES: x86-target-arch |
| |
| #ifdef BUILD_SO |
| |
| #include <stdio.h> |
| #include <pthread.h> |
| #include <unistd.h> |
| |
| void *threadFn(void *) { |
| fprintf(stderr, "thread started\n"); |
| while (true) { |
| usleep(100000); |
| } |
| return 0; |
| } |
| |
| void __attribute__((constructor)) startPolling() { |
| fprintf(stderr, "initializing library\n"); |
| pthread_t t; |
| pthread_create(&t, 0, &threadFn, 0); |
| fprintf(stderr, "done\n"); |
| } |
| |
| #else |
| |
| #include <dlfcn.h> |
| #include <stdlib.h> |
| #include <string> |
| |
| int main(int argc, char **argv) { |
| std::string path = std::string(argv[0]) + "-so.so"; |
| void *handle = dlopen(path.c_str(), RTLD_LAZY); |
| if (!handle) |
| abort(); |
| return 0; |
| } |
| #endif |