tests/tools/health/health_stall.c

   1 /*
   2  * Copyright (C) 2012 - Christian Babeux <christian.babeux@efficios.com>
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License, version 2 only, as
   6  * published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  11  * more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along with
  14  * this program; if not, write to the Free Software Foundation, Inc., 51
  15  * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  16  */
  17
  18 #include <stdlib.h>
  19 #include <string.h>
  20 #include <stdio.h>
  21 #include <unistd.h>
  22
  23 #define STALL_TIME 60
  24
  25 /*
  26  * Check if the specified environment variable is set.
  27  * Return 1 if set, otherwise 0.
  28  */
  29 int check_env_var(const char *env)
  30 {
  31         if (env) {
  32                 char *env_val = getenv(env);
  33                 if (env_val && (strncmp(env_val, "1", 1) == 0)) {
  34                         return 1;
  35                 }
  36         }
  37
  38         return 0;
  39 }
  40
  41 void __testpoint_thread_manage_clients_before_loop(void)
  42 {
  43         const char *var = "LTTNG_THREAD_MANAGE_CLIENTS_STALL";
  44
  45         if (check_env_var(var)) {
  46                 unsigned int sleep_time = STALL_TIME;
  47                 while (sleep_time > 0) {
  48                         sleep_time = sleep(sleep_time);
  49                 }
  50         }
  51 }
  52
  53 void __testpoint_thread_manage_kernel_before_loop(void)
  54 {
  55         const char *var = "LTTNG_THREAD_MANAGE_KERNEL_STALL";
  56
  57         if (check_env_var(var)) {
  58                 unsigned int sleep_time = STALL_TIME;
  59                 while (sleep_time > 0) {
  60                         sleep_time = sleep(sleep_time);
  61                 }
  62         }
  63 }
  64
  65 void __testpoint_thread_manage_apps_before_loop(void)
  66 {
  67         const char *var = "LTTNG_THREAD_MANAGE_APPS_STALL";
  68
  69         if (check_env_var(var)) {
  70                 unsigned int sleep_time = STALL_TIME;
  71                 while (sleep_time > 0) {
  72                         sleep_time = sleep(sleep_time);
  73                 }
  74         }
  75 }