| // RUN: %clangxx_asan -std=c++11 -O0 %s -o %t |
| |
| // MallocNanoZone=0 disables initialization of the Nano MallocZone on Darwin. |
| // Initialization of this zone can interfere with this test because the zone |
| // might log which opens another file descriptor, |
| // e.g. failing to setup the zone due to ASan taking the memory region it wants. |
| // RUN: env MallocNanoZone=0 %run %t 2>&1 | FileCheck %s |
| // RUN: env MallocNanoZone=0 %env_asan_opts=debug=1,verbosity=2 %run %t 2>&1 | FileCheck %s |
| |
| // Test ASan initialization |
| |
| // This test closes the 0, 1, and 2 file descriptors before an exec() and relies |
| // on them remaining closed across an execve(). This is not the case on newer |
| // versions of Android. On PPC with ASLR turned on, this fails when linked with |
| // lld - see https://bugs.llvm.org/show_bug.cgi?id=45076. |
| // UNSUPPORTED: android, powerpc |
| |
| #include <assert.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| |
| extern "C" const char *__asan_default_options() { |
| return "test_only_emulate_no_memorymap=1"; |
| } |
| |
| void parent(int argc, char **argv) { |
| fprintf(stderr, "hello\n"); |
| // CHECK: hello |
| close(0); |
| close(1); |
| dup2(2, 3); |
| close(2); |
| char *const newargv[] = {argv[0], (char *)"x", nullptr}; |
| execv(argv[0], newargv); |
| perror("execve"); |
| exit(1); |
| } |
| |
| void child() { |
| assert(dup(3) == 0); |
| assert(dup(3) == 1); |
| assert(dup(3) == 2); |
| fprintf(stderr, "world\n"); |
| // CHECK: world |
| } |
| |
| int main(int argc, char **argv) { |
| if (argc == 1) { |
| parent(argc, argv); |
| } else { |
| child(); |
| } |
| } |