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/*
* Copyright 2013, Michael Ellerman, IBM Corp.
* Licensed under GPLv2.
*/
#include <errno.h>
#include <signal.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <elf.h>
#include <fcntl.h>
#include <link.h>
#include <sys/stat.h>
#include "subunit.h"
#include "utils.h"
#define TIMEOUT 120
#define KILL_TIMEOUT 5
int run_test(int (test_function)(void), char *name)
{
bool terminated;
int rc, status;
pid_t pid;
/* Make sure output is flushed before forking */
fflush(stdout);
pid = fork();
if (pid == 0) {
setpgid(0, 0);
exit(test_function());
} else if (pid == -1) {
perror("fork");
return 1;
}
setpgid(pid, pid);
/* Wake us up in timeout seconds */
alarm(TIMEOUT);
terminated = false;
wait:
rc = waitpid(pid, &status, 0);
if (rc == -1) {
if (errno != EINTR) {
printf("unknown error from waitpid\n");
return 1;
}
if (terminated) {
printf("!! force killing %s\n", name);
kill(-pid, SIGKILL);
return 1;
} else {
printf("!! killing %s\n", name);
kill(-pid, SIGTERM);
terminated = true;
alarm(KILL_TIMEOUT);
goto wait;
}
}
/* Kill anything else in the process group that is still running */
kill(-pid, SIGTERM);
if (WIFEXITED(status))
status = WEXITSTATUS(status);
else {
if (WIFSIGNALED(status))
printf("!! child died by signal %d\n", WTERMSIG(status));
else
printf("!! child died by unknown cause\n");
status = 1; /* Signal or other */
}
return status;
}
static void alarm_handler(int signum)
{
/* Jut wake us up from waitpid */
}
static struct sigaction alarm_action = {
.sa_handler = alarm_handler,
};
int test_harness(int (test_function)(void), char *name)
{
int rc;
test_start(name);
test_set_git_version(GIT_VERSION);
if (sigaction(SIGALRM, &alarm_action, NULL)) {
perror("sigaction");
test_error(name);
return 1;
}
rc = run_test(test_function, name);
if (rc == MAGIC_SKIP_RETURN_VALUE) {
test_skip(name);
/* so that skipped test is not marked as failed */
rc = 0;
} else
test_finish(name, rc);
return rc;
}
static char auxv[4096];
void *get_auxv_entry(int type)
{
ElfW(auxv_t) *p;
void *result;
ssize_t num;
int fd;
fd = open("/proc/self/auxv", O_RDONLY);
if (fd == -1) {
perror("open");
return NULL;
}
result = NULL;
num = read(fd, auxv, sizeof(auxv));
if (num < 0) {
perror("read");
goto out;
}
if (num > sizeof(auxv)) {
printf("Overflowed auxv buffer\n");
goto out;
}
p = (ElfW(auxv_t) *)auxv;
while (p->a_type != AT_NULL) {
if (p->a_type == type) {
result = (void *)p->a_un.a_val;
break;
}
p++;
}
out:
close(fd);
return result;
}
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