1 // RUN: %clangxx_asan -std=c++11 -O0 %s -o %t
2
3 // MallocNanoZone=0 disables initialization of the Nano MallocZone on Darwin.
4 // Initialization of this zone can interfere with this test because the zone
5 // might log which opens another file descriptor,
6 // e.g. failing to setup the zone due to ASan taking the memory region it wants.
7 // RUN: env MallocNanoZone=0 %run %t 2>&1 | FileCheck %s
8 // RUN: env MallocNanoZone=0 %env_asan_opts=debug=1,verbosity=2 %run %t 2>&1 | FileCheck %s
9
10 // Test ASan initialization
11
12 // This test closes the 0, 1, and 2 file descriptors before an exec() and relies
13 // on them remaining closed across an execve(). This is not the case on newer
14 // versions of Android. On PPC with ASLR turned on, this fails when linked with
15 // lld - see https://bugs.llvm.org/show_bug.cgi?id=45076.
16 // UNSUPPORTED: android, target=powerpc{{.*}}
17
18 #include <assert.h>
19 #include <stdio.h>
20 #include <stdlib.h>
21 #include <unistd.h>
22
__asan_default_options()23 extern "C" const char *__asan_default_options() {
24 return "test_only_emulate_no_memorymap=1";
25 }
26
parent(int argc,char ** argv)27 void parent(int argc, char **argv) {
28 fprintf(stderr, "hello\n");
29 // CHECK: hello
30 close(0);
31 close(1);
32 dup2(2, 3);
33 close(2);
34 char *const newargv[] = {argv[0], (char *)"x", nullptr};
35 execv(argv[0], newargv);
36 perror("execve");
37 exit(1);
38 }
39
child()40 void child() {
41 assert(dup(3) == 0);
42 assert(dup(3) == 1);
43 assert(dup(3) == 2);
44 fprintf(stderr, "world\n");
45 // CHECK: world
46 }
47
main(int argc,char ** argv)48 int main(int argc, char **argv) {
49 if (argc == 1) {
50 parent(argc, argv);
51 } else {
52 child();
53 }
54 }
55