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// Regression test for:
// http://code.google.com/p/address-sanitizer/issues/detail?id=37
// RUN: %clangxx_asan -O0 %s -o %t && %run %t | FileCheck %s
// RUN: %clangxx_asan -O1 %s -o %t && %run %t | FileCheck %s
// RUN: %clangxx_asan -O2 %s -o %t && %run %t | FileCheck %s
// RUN: %clangxx_asan -O3 %s -o %t && %run %t | FileCheck %s
#include <stdio.h>
#include <sched.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
int Child(void *arg) {
char x[32] = {0}; // Stack gets poisoned.
printf("Child: %p\n", x);
_exit(1); // NoReturn, stack will remain unpoisoned unless we do something.
}
int main(int argc, char **argv) {
const int kStackSize = 1 << 20;
char __attribute__((aligned(16))) child_stack[kStackSize + 1];
char *sp = child_stack + kStackSize; // Stack grows down.
printf("Parent: %p\n", sp);
pid_t clone_pid = clone(Child, sp, CLONE_FILES | CLONE_VM, NULL);
int status;
pid_t wait_result = waitpid(clone_pid, &status, __WCLONE);
if (wait_result < 0) {
perror("waitpid");
return 0;
}
if (wait_result == clone_pid && WIFEXITED(status)) {
// Make sure the child stack was indeed unpoisoned.
for (int i = 0; i < kStackSize; i++)
child_stack[i] = i;
int ret = child_stack[argc - 1];
printf("PASSED\n");
// CHECK: PASSED
return ret;
}
return 0;
}
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