63d7564105
The original commit was reverted because of the problems it introduced on Linux. However, FreeBSD should not be affected, so restore that part and we will address Linux separately. While at it, remove the dbreg hack as the underlying issue has been fixed in the FreeBSD kernel and the problem is unlikely to happen in real life use anyway. Differential Revision: https://reviews.llvm.org/D98822
51 lines
1.0 KiB
C++
51 lines
1.0 KiB
C++
#include <sys/types.h>
|
|
#include <sys/wait.h>
|
|
#include <assert.h>
|
|
#if defined(TEST_CLONE)
|
|
#include <sched.h>
|
|
#endif
|
|
#include <stdint.h>
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
|
|
int g_val = 0;
|
|
|
|
void parent_func() {
|
|
g_val = 1;
|
|
printf("function run in parent\n");
|
|
}
|
|
|
|
int child_func(void *unused) {
|
|
// we need to avoid memory modifications for vfork(), yet we want
|
|
// to be able to test watchpoints, so do the next best thing
|
|
// and restore the original value
|
|
g_val = 2;
|
|
g_val = 0;
|
|
return 0;
|
|
}
|
|
|
|
int main() {
|
|
alignas(uintmax_t) char stack[4096];
|
|
|
|
#if defined(TEST_CLONE)
|
|
pid_t pid = clone(child_func, &stack[sizeof(stack)], 0, NULL);
|
|
#elif defined(TEST_FORK)
|
|
pid_t pid = TEST_FORK();
|
|
if (pid == 0)
|
|
_exit(child_func(NULL));
|
|
#endif
|
|
assert(pid != -1);
|
|
|
|
parent_func();
|
|
int status, wait_flags = 0;
|
|
#if defined(TEST_CLONE)
|
|
wait_flags = __WALL;
|
|
#endif
|
|
pid_t waited = waitpid(pid, &status, wait_flags);
|
|
assert(waited == pid);
|
|
assert(WIFEXITED(status));
|
|
printf("child exited: %d\n", WEXITSTATUS(status));
|
|
|
|
return 0;
|
|
}
|