src/bindings/java/jmsg_process.cpp

   1 /* Functions related to the java process instances.                         */
   2
   3 /* Copyright (c) 2007-2019. The SimGrid Team. All rights reserved.          */
   4
   5 /* This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the license (GNU LGPL) which comes with this package. */
   7
   8 #include "jmsg_process.h"
   9
  10 #include "JavaContext.hpp"
  11 #include "jmsg.hpp"
  12 #include "jmsg_host.h"
  13 #include "jxbt_utilities.hpp"
  14 #include "simgrid/Exception.hpp"
  15
  16 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(java);
  17
  18 jfieldID jprocess_field_Process_bind;
  19 jfieldID jprocess_field_Process_host;
  20 jfieldID jprocess_field_Process_killTime;
  21 jfieldID jprocess_field_Process_name;
  22 jfieldID jprocess_field_Process_pid;
  23 jfieldID jprocess_field_Process_ppid;
  24
  25 jobject jprocess_from_native(msg_process_t process)
  26 {
  27   simgrid::kernel::context::JavaContext* context =
  28       static_cast<simgrid::kernel::context::JavaContext*>(process->get_impl()->context_.get());
  29   return context->jprocess_;
  30 }
  31
  32 jobject jprocess_ref(jobject jprocess, JNIEnv* env)
  33 {
  34   return env->NewGlobalRef(jprocess);
  35 }
  36
  37 void jprocess_unref(jobject jprocess, JNIEnv* env)
  38 {
  39   env->DeleteGlobalRef(jprocess);
  40 }
  41
  42 msg_process_t jprocess_to_native(jobject jprocess, JNIEnv* env)
  43 {
  44   return (msg_process_t)(intptr_t)env->GetLongField(jprocess, jprocess_field_Process_bind);
  45 }
  46
  47 void jprocess_bind(jobject jprocess, msg_process_t process, JNIEnv * env)
  48 {
  49   env->SetLongField(jprocess, jprocess_field_Process_bind, (intptr_t)process);
  50 }
  51
  52 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_nativeInit(JNIEnv *env, jclass cls) {
  53   jclass jprocess_class_Process = env->FindClass("org/simgrid/msg/Process");
  54   xbt_assert(jprocess_class_Process, "Native initialization of msg/Process failed. Please report that bug");
  55
  56   jprocess_field_Process_name = jxbt_get_jfield(env, jprocess_class_Process, "name", "Ljava/lang/String;");
  57   jprocess_field_Process_bind = jxbt_get_jfield(env, jprocess_class_Process, "bind", "J");
  58   jprocess_field_Process_pid = jxbt_get_jfield(env, jprocess_class_Process, "pid", "I");
  59   jprocess_field_Process_ppid = jxbt_get_jfield(env, jprocess_class_Process, "ppid", "I");
  60   jprocess_field_Process_host = jxbt_get_jfield(env, jprocess_class_Process, "host", "Lorg/simgrid/msg/Host;");
  61   jprocess_field_Process_killTime = jxbt_get_jfield(env, jprocess_class_Process, "killTime", "D");
  62   xbt_assert(jprocess_field_Process_name && jprocess_field_Process_pid && jprocess_field_Process_ppid &&
  63                  jprocess_field_Process_host,
  64              "Native initialization of msg/Process failed. Please report that bug");
  65 }
  66
  67 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_create(JNIEnv* env, jobject jprocess_arg, jobject jhost)
  68 {
  69   /* create a global java process instance */
  70   jobject jprocess = jprocess_ref(jprocess_arg, env);
  71
  72   /* Actually build the MSG process */
  73   jstring jname         = (jstring)env->GetObjectField(jprocess, jprocess_field_Process_name);
  74   const char* name      = env->GetStringUTFChars(jname, 0);
  75   simgrid::simix::ActorCode function = [jprocess]() { simgrid::kernel::context::java_main_jprocess(jprocess); };
  76   smx_actor_t self                   = SIMIX_process_self();
  77   sg_host_t host                     = jhost_get_native(env, jhost);
  78   smx_actor_t actor                  = simgrid::kernel::actor::simcall([name, function, host, self] {
  79     return simgrid::kernel::actor::ActorImpl::create(std::move(name), std::move(function), nullptr, host, nullptr, self)
  80         .get();
  81   });
  82   MSG_process_yield();
  83
  84   env->ReleaseStringUTFChars(jname, name);
  85
  86   /* Retrieve the kill time from the process */
  87   actor->ciface()->set_kill_time((double)env->GetDoubleField(jprocess, jprocess_field_Process_killTime));
  88
  89   /* sets the PID and the PPID of the process */
  90   env->SetIntField(jprocess, jprocess_field_Process_pid, (jint)actor->ciface()->get_pid());
  91   env->SetIntField(jprocess, jprocess_field_Process_ppid, (jint)actor->ciface()->get_ppid());
  92 }
  93
  94 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_daemonize(JNIEnv* env, jobject jprocess)
  95 {
  96   msg_process_t process = jprocess_to_native(jprocess, env);
  97
  98   if (not process) {
  99     jxbt_throw_notbound(env, "process", jprocess);
 100     return;
 101   }
 102
 103   process->daemonize();
 104 }
 105
 106 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_killAll(JNIEnv* env, jclass cls)
 107 {
 108   MSG_process_killall();
 109 }
 110
 111 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Process_fromPID(JNIEnv * env, jclass cls, jint pid)
 112 {
 113   msg_process_t process = MSG_process_from_PID(pid);
 114
 115   if (not process) {
 116     jxbt_throw_process_not_found(env, std::string("PID = ") + std::to_string(static_cast<int>(pid)));
 117     return nullptr;
 118   }
 119
 120   jobject jprocess = jprocess_from_native(process);
 121
 122   if (not jprocess) {
 123     jxbt_throw_jni(env, "get process failed");
 124     return nullptr;
 125   }
 126
 127   return jprocess;
 128 }
 129
 130 JNIEXPORT jint JNICALL Java_org_simgrid_msg_Process_nativeGetPID(JNIEnv* env, jobject jprocess)
 131 {
 132   msg_process_t process = jprocess_to_native(jprocess, env);
 133   return MSG_process_get_PID(process);
 134 }
 135
 136 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Process_getProperty(JNIEnv *env, jobject jprocess, jobject jname) {
 137   msg_process_t process = jprocess_to_native(jprocess, env);
 138
 139   if (not process) {
 140     jxbt_throw_notbound(env, "process", jprocess);
 141     return nullptr;
 142   }
 143   const char *name = env->GetStringUTFChars((jstring)jname, 0);
 144
 145   const char *property = MSG_process_get_property_value(process, name);
 146   if (not property)
 147     return nullptr;
 148
 149   jobject jproperty = env->NewStringUTF(property);
 150
 151   env->ReleaseStringUTFChars((jstring)jname, name);
 152
 153   return jproperty;
 154 }
 155
 156 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Process_getCurrentProcess(JNIEnv * env, jclass cls)
 157 {
 158   jobject jprocess = jprocess_from_native(MSG_process_self());
 159   if (not jprocess)
 160     jxbt_throw_jni(env, xbt_strdup("SIMIX_process_get_jprocess() failed"));
 161
 162   return jprocess;
 163 }
 164
 165 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_suspend(JNIEnv * env, jobject jprocess)
 166 {
 167   msg_process_t process = jprocess_to_native(jprocess, env);
 168
 169   if (not process) {
 170     jxbt_throw_notbound(env, "process", jprocess);
 171     return;
 172   }
 173
 174   /* suspend the process */
 175   process->suspend();
 176 }
 177
 178 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_resume(JNIEnv * env, jobject jprocess)
 179 {
 180   msg_process_t process = jprocess_to_native(jprocess, env);
 181
 182   if (not process) {
 183     jxbt_throw_notbound(env, "process", jprocess);
 184     return;
 185   }
 186
 187   /* resume the process */
 188   process->resume();
 189 }
 190
 191 JNIEXPORT void
 192 JNICALL Java_org_simgrid_msg_Process_setAutoRestart (JNIEnv *env, jobject jprocess, jboolean jauto_restart) {
 193
 194   msg_process_t process = jprocess_to_native(jprocess, env);
 195   if (not process) {
 196     jxbt_throw_notbound(env, "process", jprocess);
 197     return;
 198   }
 199
 200   process->set_auto_restart(jauto_restart == JNI_TRUE);
 201 }
 202
 203 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_restart (JNIEnv *env, jobject jprocess) {
 204   msg_process_t process = jprocess_to_native(jprocess, env);
 205
 206   if (not process) {
 207     jxbt_throw_notbound(env, "process", jprocess);
 208     return;
 209   }
 210
 211   process->restart();
 212 }
 213
 214 JNIEXPORT jboolean JNICALL Java_org_simgrid_msg_Process_isSuspended(JNIEnv * env, jobject jprocess)
 215 {
 216   msg_process_t process = jprocess_to_native(jprocess, env);
 217
 218   if (not process) {
 219     jxbt_throw_notbound(env, "process", jprocess);
 220     return 0;
 221   }
 222
 223   /* true is the process is suspended, false otherwise */
 224   return (jboolean)process->is_suspended();
 225 }
 226
 227 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_sleep(JNIEnv *env, jclass cls, jlong jmillis, jint jnanos)
 228  {
 229   double time =  ((double)jmillis) / 1000 + ((double)jnanos) / 1000000000;
 230   msg_error_t rv = MSG_OK;
 231   if (not simgrid::ForcefulKillException::try_n_catch([&time]() { simgrid::s4u::this_actor::sleep_for(time); })) {
 232     rv = MSG_HOST_FAILURE;
 233   }
 234   if (rv != MSG_OK) {
 235     jmsg_throw_status(env, rv);
 236   }
 237 }
 238
 239 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_waitFor(JNIEnv * env, jobject jprocess, jdouble jseconds)
 240 {
 241   msg_error_t rv = MSG_OK;
 242   if (not simgrid::ForcefulKillException::try_n_catch(
 243           [&jseconds]() { simgrid::s4u::this_actor::sleep_for((double)jseconds); })) {
 244     rv = MSG_HOST_FAILURE;
 245     jxbt_throw_by_name(env, "org/simgrid/msg/ProcessKilledError", "Process killed");
 246   }
 247   if (env->ExceptionOccurred())
 248     return;
 249   if (rv != MSG_OK) {
 250     XBT_DEBUG("Status NOK");
 251     jmsg_throw_status(env,rv);
 252   }
 253 }
 254
 255 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_kill(JNIEnv * env, jobject jprocess)
 256 {
 257   /* get the native instances from the java ones */
 258   msg_process_t process = jprocess_to_native(jprocess, env);
 259   if (not process) {
 260     jxbt_throw_notbound(env, "process", jprocess);
 261     return;
 262   }
 263   if (not simgrid::ForcefulKillException::try_n_catch([&process]() { MSG_process_kill(process); })) {
 264     jxbt_throw_by_name(env, "org/simgrid/msg/ProcessKilledError", "Process killed");
 265   }
 266 }
 267
 268 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_migrate(JNIEnv * env, jobject jprocess, jobject jhost)
 269 {
 270   msg_process_t process = jprocess_to_native(jprocess, env);
 271
 272   if (not process) {
 273     jxbt_throw_notbound(env, "process", jprocess);
 274     return;
 275   }
 276
 277   msg_host_t host = jhost_get_native(env, jhost);
 278
 279   if (not host) {
 280     jxbt_throw_notbound(env, "host", jhost);
 281     return;
 282   }
 283
 284   /* change the host of the process */
 285   process->set_host(host);
 286
 287   /* change the host java side */
 288   env->SetObjectField(jprocess, jprocess_field_Process_host, jhost);
 289 }
 290
 291 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_yield(JNIEnv* env, jclass cls)
 292 {
 293   MSG_process_yield();
 294 }
 295
 296 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_setKillTime (JNIEnv *env , jobject jprocess, jdouble jkilltime) {
 297   msg_process_t process = jprocess_to_native(jprocess, env);
 298   MSG_process_set_kill_time(process, (double)jkilltime);
 299 }
 300
 301 JNIEXPORT jint JNICALL Java_org_simgrid_msg_Process_getCount(JNIEnv * env, jclass cls) {
 302   return (jint) MSG_process_get_number();
 303 }