| 1 | // Test that ASan doesn't deadlock in __interceptor_pthread_create called |
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| 2 | // from dlopened shared library constructor. The deadlock happens only in shared |
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| 3 | // ASan runtime with recent Glibc (2.23 fits) when __interceptor_pthread_create |
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| 4 | // grabs global Glibc's GL(dl_load_lock) and waits for tls_get_addr_tail that |
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| 5 | // also tries to acquire it. |
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| 6 | // |
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| 7 | // RUN: %clangxx_asan -DBUILD_SO=1 -fPIC -shared %s -o %t-so.so |
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| 8 | // RUN: %clangxx_asan %s -o %t |
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| 9 | // RUN: %run %t 2>&1 |
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| 10 | |
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| 11 | // dlopen() can not be intercepted on Android |
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| 12 | // UNSUPPORTED: android |
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| 13 | // REQUIRES: x86-target-arch |
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| 14 | |
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| 15 | #ifdef BUILD_SO |
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| 16 | |
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| 17 | #include <stdio.h> |
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| 18 | #include <pthread.h> |
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| 19 | #include <unistd.h> |
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| 20 | |
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| 21 | void *threadFn(void *) { |
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| 22 | fprintf(stderr, "thread started\n" ); |
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| 23 | while (true) { |
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| 24 | usleep(100000); |
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| 25 | } |
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| 26 | return 0; |
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| 27 | } |
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| 28 | |
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| 29 | void __attribute__((constructor)) startPolling() { |
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| 30 | fprintf(stderr, "initializing library\n" ); |
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| 31 | pthread_t t; |
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| 32 | pthread_create(&t, 0, &threadFn, 0); |
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| 33 | fprintf(stderr, "done\n" ); |
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| 34 | } |
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| 35 | |
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| 36 | #else |
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| 37 | |
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| 38 | #include <dlfcn.h> |
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| 39 | #include <stdlib.h> |
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| 40 | #include <string> |
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| 41 | |
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| 42 | int main(int argc, char **argv) { |
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| 43 | std::string path = std::string(argv[0]) + "-so.so" ; |
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| 44 | void *handle = dlopen(file: path.c_str(), RTLD_LAZY); |
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| 45 | if (!handle) |
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| 46 | abort(); |
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| 47 | return 0; |
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| 48 | } |
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| 49 | #endif |
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| 50 | |
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