ATF_TC_BODY(ptrace__follow_fork_both_attached_unrelated_debugger, tc)
{
pid_t children[2], fpid, wpid;
int cpipe[2], status;
ATF_REQUIRE(pipe(cpipe) == 0);
ATF_REQUIRE((fpid = fork()) != -1);
if (fpid == 0) {
attach_fork_parent(cpipe);
follow_fork_parent();
}
/* Parent process. */
close(cpipe[1]);
/* Wait for the direct child to exit. */
wpid = waitpid(fpid, &status, 0);
ATF_REQUIRE(wpid == fpid);
ATF_REQUIRE(WIFEXITED(status));
ATF_REQUIRE(WEXITSTATUS(status) == 3);
/* Read the pid of the fork parent. */
ATF_REQUIRE(read(cpipe[0], &children[0], sizeof(children[0])) ==
sizeof(children[0]));
/* Attach to the fork parent. */
attach_child(children[0]);
ATF_REQUIRE(ptrace(PT_FOLLOW_FORK, children[0], NULL, 1) != -1);
/* Continue the fork parent ignoring the SIGSTOP. */
ATF_REQUIRE(ptrace(PT_CONTINUE, children[0], (caddr_t)1, 0) != -1);
/* Signal the fork parent to continue. */
close(cpipe[0]);
children[1] = handle_fork_events(children[0]);
ATF_REQUIRE(children[1] > 0);
ATF_REQUIRE(ptrace(PT_CONTINUE, children[0], (caddr_t)1, 0) != -1);
ATF_REQUIRE(ptrace(PT_CONTINUE, children[1], (caddr_t)1, 0) != -1);
/*
* The fork parent can't exit until the child reports status,
* so the child should report its exit first to the debugger.
*/
wpid = wait(&status);
ATF_REQUIRE(wpid == children[1]);
ATF_REQUIRE(WIFEXITED(status));
ATF_REQUIRE(WEXITSTATUS(status) == 2);
wpid = wait(&status);
ATF_REQUIRE(wpid == children[0]);
ATF_REQUIRE(WIFEXITED(status));
ATF_REQUIRE(WEXITSTATUS(status) == 1);
wpid = wait(&status);
ATF_REQUIRE(wpid == -1);
ATF_REQUIRE(errno == ECHILD);
}
ATF_TC_BODY(ptrace__new_child_pl_syscall_code_fork, tc)
{
struct ptrace_lwpinfo pl[2];
pid_t children[2], fpid, wpid;
int status;
ATF_REQUIRE((fpid = fork()) != -1);
if (fpid == 0) {
trace_me();
follow_fork_parent(false);
}
/* Parent process. */
children[0] = fpid;
/* The first wait() should report the stop from SIGSTOP. */
wpid = waitpid(children[0], &status, 0);
ATF_REQUIRE(wpid == children[0]);
ATF_REQUIRE(WIFSTOPPED(status));
ATF_REQUIRE(WSTOPSIG(status) == SIGSTOP);
ATF_REQUIRE(ptrace(PT_FOLLOW_FORK, children[0], NULL, 1) != -1);
/* Continue the child ignoring the SIGSTOP. */
ATF_REQUIRE(ptrace(PT_CONTINUE, children[0], (caddr_t)1, 0) != -1);
/* Wait for both halves of the fork event to get reported. */
children[1] = handle_fork_events(children[0], pl);
ATF_REQUIRE(children[1] > 0);
ATF_REQUIRE((pl[0].pl_flags & PL_FLAG_SCX) != 0);
ATF_REQUIRE((pl[1].pl_flags & PL_FLAG_SCX) != 0);
ATF_REQUIRE(pl[0].pl_syscall_code == SYS_fork);
ATF_REQUIRE(pl[0].pl_syscall_code == pl[1].pl_syscall_code);
ATF_REQUIRE(pl[0].pl_syscall_narg == pl[1].pl_syscall_narg);
ATF_REQUIRE(ptrace(PT_CONTINUE, children[0], (caddr_t)1, 0) != -1);
ATF_REQUIRE(ptrace(PT_CONTINUE, children[1], (caddr_t)1, 0) != -1);
/*
* The child can't exit until the grandchild reports status, so the
* grandchild should report its exit first to the debugger.
*/
wpid = wait(&status);
ATF_REQUIRE(wpid == children[1]);
ATF_REQUIRE(WIFEXITED(status));
ATF_REQUIRE(WEXITSTATUS(status) == 2);
wpid = wait(&status);
ATF_REQUIRE(wpid == children[0]);
ATF_REQUIRE(WIFEXITED(status));
ATF_REQUIRE(WEXITSTATUS(status) == 1);
wpid = wait(&status);
ATF_REQUIRE(wpid == -1);
ATF_REQUIRE(errno == ECHILD);
}
ATF_TC_BODY(ptrace__follow_fork_parent_detached, tc)
{
pid_t children[2], fpid, wpid;
int status;
ATF_REQUIRE((fpid = fork()) != -1);
if (fpid == 0) {
trace_me();
follow_fork_parent();
}
/* Parent process. */
children[0] = fpid;
/* The first wait() should report the stop from SIGSTOP. */
wpid = waitpid(children[0], &status, 0);
ATF_REQUIRE(wpid == children[0]);
ATF_REQUIRE(WIFSTOPPED(status));
ATF_REQUIRE(WSTOPSIG(status) == SIGSTOP);
ATF_REQUIRE(ptrace(PT_FOLLOW_FORK, children[0], NULL, 1) != -1);
/* Continue the child ignoring the SIGSTOP. */
ATF_REQUIRE(ptrace(PT_CONTINUE, children[0], (caddr_t)1, 0) != -1);
children[1] = handle_fork_events(children[0]);
ATF_REQUIRE(children[1] > 0);
ATF_REQUIRE(ptrace(PT_DETACH, children[0], (caddr_t)1, 0) != -1);
ATF_REQUIRE(ptrace(PT_CONTINUE, children[1], (caddr_t)1, 0) != -1);
/*
* The child can't exit until the grandchild reports status, so the
* grandchild should report its exit first to the debugger.
*
* Even though the child process is detached, it is still a
* child of the debugger, so it will still report it's exit
* after the grandchild.
*/
wpid = wait(&status);
ATF_REQUIRE(wpid == children[1]);
ATF_REQUIRE(WIFEXITED(status));
ATF_REQUIRE(WEXITSTATUS(status) == 2);
wpid = wait(&status);
ATF_REQUIRE(wpid == children[0]);
ATF_REQUIRE(WIFEXITED(status));
ATF_REQUIRE(WEXITSTATUS(status) == 1);
wpid = wait(&status);
ATF_REQUIRE(wpid == -1);
ATF_REQUIRE(errno == ECHILD);
}
ATF_TC_BODY(ptrace__follow_fork_child_detached, tc)
{
pid_t children[2], fpid, wpid;
int status;
ATF_REQUIRE((fpid = fork()) != -1);
if (fpid == 0) {
trace_me();
follow_fork_parent();
}
/* Parent process. */
children[0] = fpid;
/* The first wait() should report the stop from SIGSTOP. */
wpid = waitpid(children[0], &status, 0);
ATF_REQUIRE(wpid == children[0]);
ATF_REQUIRE(WIFSTOPPED(status));
ATF_REQUIRE(WSTOPSIG(status) == SIGSTOP);
ATF_REQUIRE(ptrace(PT_FOLLOW_FORK, children[0], NULL, 1) != -1);
/* Continue the child ignoring the SIGSTOP. */
ATF_REQUIRE(ptrace(PT_CONTINUE, children[0], (caddr_t)1, 0) != -1);
children[1] = handle_fork_events(children[0]);
ATF_REQUIRE(children[1] > 0);
ATF_REQUIRE(ptrace(PT_CONTINUE, children[0], (caddr_t)1, 0) != -1);
ATF_REQUIRE(ptrace(PT_DETACH, children[1], (caddr_t)1, 0) != -1);
/*
* Should not see any status from the grandchild now, only the
* child.
*/
wpid = wait(&status);
ATF_REQUIRE(wpid == children[0]);
ATF_REQUIRE(WIFEXITED(status));
ATF_REQUIRE(WEXITSTATUS(status) == 1);
wpid = wait(&status);
ATF_REQUIRE(wpid == -1);
ATF_REQUIRE(errno == ECHILD);
}
