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, powerpc 17 18 #include <assert.h> 19 #include <stdio.h> 20 #include <stdlib.h> 21 #include <unistd.h> 22 23 extern "C" const char *__asan_default_options() { 24 return "test_only_emulate_no_memorymap=1"; 25 } 26 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 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 48 int main(int argc, char **argv) { 49 if (argc == 1) { 50 parent(argc, argv); 51 } else { 52 child(); 53 } 54 } 55