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// 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, target=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();
}
}
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