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272 lines
8.1 KiB
272 lines
8.1 KiB
/* SPDX-License-Identifier: GPL-2.0 */
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#define _GNU_SOURCE
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#include <errno.h>
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#include <linux/sched.h>
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#include <linux/types.h>
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#include <signal.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sched.h>
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#include <string.h>
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#include <sys/resource.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <unistd.h>
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#include "pidfd.h"
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#include "../kselftest.h"
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#define ptr_to_u64(ptr) ((__u64)((uintptr_t)(ptr)))
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static pid_t sys_clone3(struct clone_args *args)
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{
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return syscall(__NR_clone3, args, sizeof(struct clone_args));
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}
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static int sys_waitid(int which, pid_t pid, siginfo_t *info, int options,
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struct rusage *ru)
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{
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return syscall(__NR_waitid, which, pid, info, options, ru);
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}
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static int test_pidfd_wait_simple(void)
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{
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const char *test_name = "pidfd wait simple";
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int pidfd = -1, status = 0;
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pid_t parent_tid = -1;
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struct clone_args args = {
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.parent_tid = ptr_to_u64(&parent_tid),
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.pidfd = ptr_to_u64(&pidfd),
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.flags = CLONE_PIDFD | CLONE_PARENT_SETTID,
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.exit_signal = SIGCHLD,
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};
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int ret;
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pid_t pid;
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siginfo_t info = {
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.si_signo = 0,
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};
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pidfd = open("/proc/self", O_DIRECTORY | O_RDONLY | O_CLOEXEC);
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if (pidfd < 0)
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ksft_exit_fail_msg("%s test: failed to open /proc/self %s\n",
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test_name, strerror(errno));
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pid = sys_waitid(P_PIDFD, pidfd, &info, WEXITED, NULL);
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if (pid == 0)
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ksft_exit_fail_msg(
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"%s test: succeeded to wait on invalid pidfd %s\n",
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test_name, strerror(errno));
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close(pidfd);
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pidfd = -1;
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pidfd = open("/dev/null", O_RDONLY | O_CLOEXEC);
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if (pidfd == 0)
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ksft_exit_fail_msg("%s test: failed to open /dev/null %s\n",
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test_name, strerror(errno));
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pid = sys_waitid(P_PIDFD, pidfd, &info, WEXITED, NULL);
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if (pid == 0)
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ksft_exit_fail_msg(
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"%s test: succeeded to wait on invalid pidfd %s\n",
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test_name, strerror(errno));
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close(pidfd);
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pidfd = -1;
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pid = sys_clone3(&args);
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if (pid < 0)
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ksft_exit_fail_msg("%s test: failed to create new process %s\n",
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test_name, strerror(errno));
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if (pid == 0)
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exit(EXIT_SUCCESS);
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pid = sys_waitid(P_PIDFD, pidfd, &info, WEXITED, NULL);
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if (pid < 0)
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ksft_exit_fail_msg(
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"%s test: failed to wait on process with pid %d and pidfd %d: %s\n",
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test_name, parent_tid, pidfd, strerror(errno));
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if (!WIFEXITED(info.si_status) || WEXITSTATUS(info.si_status))
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ksft_exit_fail_msg(
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"%s test: unexpected status received after waiting on process with pid %d and pidfd %d: %s\n",
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test_name, parent_tid, pidfd, strerror(errno));
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close(pidfd);
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if (info.si_signo != SIGCHLD)
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ksft_exit_fail_msg(
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"%s test: unexpected si_signo value %d received after waiting on process with pid %d and pidfd %d: %s\n",
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test_name, info.si_signo, parent_tid, pidfd,
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strerror(errno));
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if (info.si_code != CLD_EXITED)
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ksft_exit_fail_msg(
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"%s test: unexpected si_code value %d received after waiting on process with pid %d and pidfd %d: %s\n",
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test_name, info.si_code, parent_tid, pidfd,
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strerror(errno));
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if (info.si_pid != parent_tid)
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ksft_exit_fail_msg(
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"%s test: unexpected si_pid value %d received after waiting on process with pid %d and pidfd %d: %s\n",
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test_name, info.si_pid, parent_tid, pidfd,
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strerror(errno));
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ksft_test_result_pass("%s test: Passed\n", test_name);
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return 0;
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}
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static int test_pidfd_wait_states(void)
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{
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const char *test_name = "pidfd wait states";
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int pidfd = -1, status = 0;
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pid_t parent_tid = -1;
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struct clone_args args = {
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.parent_tid = ptr_to_u64(&parent_tid),
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.pidfd = ptr_to_u64(&pidfd),
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.flags = CLONE_PIDFD | CLONE_PARENT_SETTID,
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.exit_signal = SIGCHLD,
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};
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int ret;
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pid_t pid;
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siginfo_t info = {
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.si_signo = 0,
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};
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pid = sys_clone3(&args);
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if (pid < 0)
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ksft_exit_fail_msg("%s test: failed to create new process %s\n",
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test_name, strerror(errno));
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if (pid == 0) {
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kill(getpid(), SIGSTOP);
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kill(getpid(), SIGSTOP);
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exit(EXIT_SUCCESS);
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}
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ret = sys_waitid(P_PIDFD, pidfd, &info, WSTOPPED, NULL);
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if (ret < 0)
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ksft_exit_fail_msg(
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"%s test: failed to wait on WSTOPPED process with pid %d and pidfd %d: %s\n",
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test_name, parent_tid, pidfd, strerror(errno));
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if (info.si_signo != SIGCHLD)
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ksft_exit_fail_msg(
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"%s test: unexpected si_signo value %d received after waiting on process with pid %d and pidfd %d: %s\n",
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test_name, info.si_signo, parent_tid, pidfd,
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strerror(errno));
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if (info.si_code != CLD_STOPPED)
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ksft_exit_fail_msg(
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"%s test: unexpected si_code value %d received after waiting on process with pid %d and pidfd %d: %s\n",
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test_name, info.si_code, parent_tid, pidfd,
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strerror(errno));
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if (info.si_pid != parent_tid)
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ksft_exit_fail_msg(
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"%s test: unexpected si_pid value %d received after waiting on process with pid %d and pidfd %d: %s\n",
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test_name, info.si_pid, parent_tid, pidfd,
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strerror(errno));
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ret = sys_pidfd_send_signal(pidfd, SIGCONT, NULL, 0);
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if (ret < 0)
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ksft_exit_fail_msg(
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"%s test: failed to send signal to process with pid %d and pidfd %d: %s\n",
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test_name, parent_tid, pidfd, strerror(errno));
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ret = sys_waitid(P_PIDFD, pidfd, &info, WCONTINUED, NULL);
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if (ret < 0)
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ksft_exit_fail_msg(
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"%s test: failed to wait WCONTINUED on process with pid %d and pidfd %d: %s\n",
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test_name, parent_tid, pidfd, strerror(errno));
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if (info.si_signo != SIGCHLD)
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ksft_exit_fail_msg(
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"%s test: unexpected si_signo value %d received after waiting on process with pid %d and pidfd %d: %s\n",
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test_name, info.si_signo, parent_tid, pidfd,
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strerror(errno));
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if (info.si_code != CLD_CONTINUED)
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ksft_exit_fail_msg(
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"%s test: unexpected si_code value %d received after waiting on process with pid %d and pidfd %d: %s\n",
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test_name, info.si_code, parent_tid, pidfd,
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strerror(errno));
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if (info.si_pid != parent_tid)
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ksft_exit_fail_msg(
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"%s test: unexpected si_pid value %d received after waiting on process with pid %d and pidfd %d: %s\n",
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test_name, info.si_pid, parent_tid, pidfd,
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strerror(errno));
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ret = sys_waitid(P_PIDFD, pidfd, &info, WUNTRACED, NULL);
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if (ret < 0)
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ksft_exit_fail_msg(
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"%s test: failed to wait on WUNTRACED process with pid %d and pidfd %d: %s\n",
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test_name, parent_tid, pidfd, strerror(errno));
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if (info.si_signo != SIGCHLD)
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ksft_exit_fail_msg(
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"%s test: unexpected si_signo value %d received after waiting on process with pid %d and pidfd %d: %s\n",
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test_name, info.si_signo, parent_tid, pidfd,
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strerror(errno));
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if (info.si_code != CLD_STOPPED)
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ksft_exit_fail_msg(
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"%s test: unexpected si_code value %d received after waiting on process with pid %d and pidfd %d: %s\n",
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test_name, info.si_code, parent_tid, pidfd,
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strerror(errno));
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if (info.si_pid != parent_tid)
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ksft_exit_fail_msg(
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"%s test: unexpected si_pid value %d received after waiting on process with pid %d and pidfd %d: %s\n",
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test_name, info.si_pid, parent_tid, pidfd,
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strerror(errno));
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ret = sys_pidfd_send_signal(pidfd, SIGKILL, NULL, 0);
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if (ret < 0)
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ksft_exit_fail_msg(
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"%s test: failed to send SIGKILL to process with pid %d and pidfd %d: %s\n",
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test_name, parent_tid, pidfd, strerror(errno));
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ret = sys_waitid(P_PIDFD, pidfd, &info, WEXITED, NULL);
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if (ret < 0)
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ksft_exit_fail_msg(
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"%s test: failed to wait on WEXITED process with pid %d and pidfd %d: %s\n",
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test_name, parent_tid, pidfd, strerror(errno));
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if (info.si_signo != SIGCHLD)
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ksft_exit_fail_msg(
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"%s test: unexpected si_signo value %d received after waiting on process with pid %d and pidfd %d: %s\n",
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test_name, info.si_signo, parent_tid, pidfd,
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strerror(errno));
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if (info.si_code != CLD_KILLED)
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ksft_exit_fail_msg(
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"%s test: unexpected si_code value %d received after waiting on process with pid %d and pidfd %d: %s\n",
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test_name, info.si_code, parent_tid, pidfd,
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strerror(errno));
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if (info.si_pid != parent_tid)
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ksft_exit_fail_msg(
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"%s test: unexpected si_pid value %d received after waiting on process with pid %d and pidfd %d: %s\n",
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test_name, info.si_pid, parent_tid, pidfd,
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strerror(errno));
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close(pidfd);
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ksft_test_result_pass("%s test: Passed\n", test_name);
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return 0;
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}
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int main(int argc, char **argv)
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{
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ksft_print_header();
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ksft_set_plan(2);
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test_pidfd_wait_simple();
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test_pidfd_wait_states();
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return ksft_exit_pass();
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}
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