1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
|
// 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
|
