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7c27a26e1e
There are some powerpc selftests, as tm/tm-unavailable, that run for a long period (>120 seconds), and if it is interrupted, as pressing CRTL-C (SIGINT), the foreground process (harness) dies but the child process and threads continue to execute (with PPID = 1 now) in background. In this case, you'd think the whole test exited, but there are remaining threads and processes being executed in background. Sometimes these zombies processes are doing annoying things, as consuming the whole CPU or dumping things to STDOUT. This patch fixes this problem by attaching an empty signal handler to SIGINT in the harness process. This handler will interrupt (EINTR) the parent process waitpid() call, letting the code to follow through the normal flow, which will kill all the processes in the child process group. This patch also fixes a typo. Signed-off-by: Breno Leitao <leitao@debian.org> Signed-off-by: Gustavo Romero <gromero@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
132 lines
2.3 KiB
C
132 lines
2.3 KiB
C
/*
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* Copyright 2013, Michael Ellerman, IBM Corp.
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* Licensed under GPLv2.
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*/
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#include <errno.h>
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#include <signal.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.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 <elf.h>
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#include <fcntl.h>
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#include <link.h>
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#include <sys/stat.h>
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#include "subunit.h"
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#include "utils.h"
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#define KILL_TIMEOUT 5
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static uint64_t timeout = 120;
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int run_test(int (test_function)(void), char *name)
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{
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bool terminated;
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int rc, status;
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pid_t pid;
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/* Make sure output is flushed before forking */
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fflush(stdout);
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pid = fork();
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if (pid == 0) {
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setpgid(0, 0);
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exit(test_function());
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} else if (pid == -1) {
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perror("fork");
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return 1;
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}
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setpgid(pid, pid);
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/* Wake us up in timeout seconds */
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alarm(timeout);
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terminated = false;
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wait:
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rc = waitpid(pid, &status, 0);
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if (rc == -1) {
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if (errno != EINTR) {
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printf("unknown error from waitpid\n");
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return 1;
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}
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if (terminated) {
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printf("!! force killing %s\n", name);
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kill(-pid, SIGKILL);
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return 1;
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} else {
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printf("!! killing %s\n", name);
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kill(-pid, SIGTERM);
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terminated = true;
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alarm(KILL_TIMEOUT);
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goto wait;
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}
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}
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/* Kill anything else in the process group that is still running */
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kill(-pid, SIGTERM);
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if (WIFEXITED(status))
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status = WEXITSTATUS(status);
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else {
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if (WIFSIGNALED(status))
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printf("!! child died by signal %d\n", WTERMSIG(status));
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else
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printf("!! child died by unknown cause\n");
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status = 1; /* Signal or other */
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}
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return status;
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}
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static void sig_handler(int signum)
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{
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/* Just wake us up from waitpid */
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}
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static struct sigaction sig_action = {
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.sa_handler = sig_handler,
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};
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void test_harness_set_timeout(uint64_t time)
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{
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timeout = time;
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}
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int test_harness(int (test_function)(void), char *name)
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{
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int rc;
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test_start(name);
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test_set_git_version(GIT_VERSION);
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if (sigaction(SIGINT, &sig_action, NULL)) {
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perror("sigaction (sigint)");
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test_error(name);
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return 1;
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}
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if (sigaction(SIGALRM, &sig_action, NULL)) {
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perror("sigaction (sigalrm)");
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test_error(name);
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return 1;
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}
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rc = run_test(test_function, name);
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if (rc == MAGIC_SKIP_RETURN_VALUE) {
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test_skip(name);
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/* so that skipped test is not marked as failed */
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rc = 0;
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} else
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test_finish(name, rc);
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return rc;
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}
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