tools/testing/selftests/powerpc/harness.c

   1 /*
   2  * Copyright 2013, Michael Ellerman, IBM Corp.
   3  * Licensed under GPLv2.
   4  */
   5
   6 #include <errno.h>
   7 #include <signal.h>
   8 #include <stdbool.h>
   9 #include <stdio.h>
  10 #include <stdlib.h>
  11 #include <sys/types.h>
  12 #include <sys/wait.h>
  13 #include <unistd.h>
  14 #include <elf.h>
  15 #include <fcntl.h>
  16 #include <link.h>
  17 #include <sys/stat.h>
  18
  19 #include "subunit.h"
  20 #include "utils.h"
  21
  22 #define KILL_TIMEOUT    5
  23
  24 static uint64_t timeout = 120;
  25
  26 int run_test(int (test_function)(void), char *name)
  27 {
  28         bool terminated;
  29         int rc, status;
  30         pid_t pid;
  31
  32         /* Make sure output is flushed before forking */
  33         fflush(stdout);
  34
  35         pid = fork();
  36         if (pid == 0) {
  37                 setpgid(0, 0);
  38                 exit(test_function());
  39         } else if (pid == -1) {
  40                 perror("fork");
  41                 return 1;
  42         }
  43
  44         setpgid(pid, pid);
  45
  46         /* Wake us up in timeout seconds */
  47         alarm(timeout);
  48         terminated = false;
  49
  50 wait:
  51         rc = waitpid(pid, &status, 0);
  52         if (rc == -1) {
  53                 if (errno != EINTR) {
  54                         printf("unknown error from waitpid\n");
  55                         return 1;
  56                 }
  57
  58                 if (terminated) {
  59                         printf("!! force killing %s\n", name);
  60                         kill(-pid, SIGKILL);
  61                         return 1;
  62                 } else {
  63                         printf("!! killing %s\n", name);
  64                         kill(-pid, SIGTERM);
  65                         terminated = true;
  66                         alarm(KILL_TIMEOUT);
  67                         goto wait;
  68                 }
  69         }
  70
  71         /* Kill anything else in the process group that is still running */
  72         kill(-pid, SIGTERM);
  73
  74         if (WIFEXITED(status))
  75                 status = WEXITSTATUS(status);
  76         else {
  77                 if (WIFSIGNALED(status))
  78                         printf("!! child died by signal %d\n", WTERMSIG(status));
  79                 else
  80                         printf("!! child died by unknown cause\n");
  81
  82                 status = 1; /* Signal or other */
  83         }
  84
  85         return status;
  86 }
  87
  88 static void alarm_handler(int signum)
  89 {
  90         /* Jut wake us up from waitpid */
  91 }
  92
  93 static struct sigaction alarm_action = {
  94         .sa_handler = alarm_handler,
  95 };
  96
  97 void test_harness_set_timeout(uint64_t time)
  98 {
  99         timeout = time;
 100 }
 101
 102 int test_harness(int (test_function)(void), char *name)
 103 {
 104         int rc;
 105
 106         test_start(name);
 107         test_set_git_version(GIT_VERSION);
 108
 109         if (sigaction(SIGALRM, &alarm_action, NULL)) {
 110                 perror("sigaction");
 111                 test_error(name);
 112                 return 1;
 113         }
 114
 115         rc = run_test(test_function, name);
 116
 117         if (rc == MAGIC_SKIP_RETURN_VALUE)
 118                 test_skip(name);
 119         else
 120                 test_finish(name, rc);
 121
 122         return rc;
 123 }