src/bindings/java/jmsg_process.c

   1 /* Functions related to the java process instances.                         */
   2
   3 /* Copyright (c) 2007-2014. The SimGrid Team.
   4  * All rights reserved.                                                     */
   5
   6 /* This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the license (GNU LGPL) which comes with this package. */
   8
   9 #include "jmsg_process.h"
  10
  11 #include "jmsg.h"
  12 #include "jmsg_host.h"
  13 #include "jxbt_utilities.h"
  14 #include "smx_context_java.h"
  15 #include "smx_context_cojava.h"
  16
  17 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(jmsg);
  18
  19 jfieldID jprocess_field_Process_bind;
  20 jfieldID jprocess_field_Process_host;
  21 jfieldID jprocess_field_Process_killTime;
  22 jfieldID jprocess_field_Process_id;
  23 jfieldID jprocess_field_Process_name;
  24 jfieldID jprocess_field_Process_pid;
  25 jfieldID jprocess_field_Process_ppid;
  26
  27 JNIEXPORT void JNICALL
  28 Java_org_simgrid_msg_Process_exit(JNIEnv *env, jobject jprocess) {
  29   if (smx_factory_initializer_to_use == SIMIX_ctx_cojava_factory_init) {
  30     msg_process_t process = jprocess_to_native_process(jprocess, env);
  31     smx_context_t context = MSG_process_get_smx_ctx(process);
  32     smx_ctx_cojava_stop(context);
  33   }
  34 }
  35
  36 jobject native_to_java_process(msg_process_t process)
  37 {
  38   return ((smx_ctx_java_t)MSG_process_get_smx_ctx(process))->jprocess;
  39 }
  40
  41 jobject jprocess_new_global_ref(jobject jprocess, JNIEnv * env)
  42 {
  43   return (*env)->NewGlobalRef(env, jprocess);
  44 }
  45
  46 void jprocess_delete_global_ref(jobject jprocess, JNIEnv * env)
  47 {
  48   (*env)->DeleteGlobalRef(env, jprocess);
  49 }
  50
  51 void jprocess_join(jobject jprocess, JNIEnv * env)
  52 {
  53         msg_process_t process = jprocess_to_native_process(jprocess,env);
  54         smx_ctx_java_t context = (smx_ctx_java_t)MSG_process_get_smx_ctx(process);
  55         xbt_os_thread_join(context->thread,NULL);
  56 }
  57
  58 msg_process_t jprocess_to_native_process(jobject jprocess, JNIEnv * env)
  59 {
  60   return
  61     (msg_process_t)(intptr_t)(*env)->GetLongField(env, jprocess,
  62                                                   jprocess_field_Process_bind);
  63 }
  64
  65 void jprocess_bind(jobject jprocess, msg_process_t process, JNIEnv * env)
  66 {
  67   (*env)->SetLongField(env, jprocess, jprocess_field_Process_bind,
  68                        (intptr_t)process);
  69 }
  70
  71 jlong jprocess_get_id(jobject jprocess, JNIEnv * env)
  72 {
  73   return
  74     (intptr_t)(*env)->GetLongField(env, jprocess, jprocess_field_Process_id);
  75 }
  76
  77 jstring jprocess_get_name(jobject jprocess, JNIEnv * env)
  78 {
  79   jstring jname = (jstring) (*env)->GetObjectField(env, jprocess, jprocess_field_Process_name);
  80   return (*env)->NewGlobalRef(env, jname);
  81
  82 }
  83
  84 jboolean jprocess_is_valid(jobject jprocess, JNIEnv * env)
  85 {
  86   jfieldID id = jxbt_get_sfield(env, "org/simgrid/msg/Process", "bind", "J");
  87
  88   if (!id)
  89     return JNI_FALSE;
  90
  91   return (*env)->GetLongField(env, jprocess, id) ? JNI_TRUE : JNI_FALSE;
  92 }
  93 JNIEXPORT void JNICALL
  94 Java_org_simgrid_msg_Process_nativeInit(JNIEnv *env, jclass cls) {
  95   jclass jprocess_class_Process = (*env)->FindClass(env, "org/simgrid/msg/Process");
  96
  97   jprocess_field_Process_name = jxbt_get_jfield(env, jprocess_class_Process, "name", "Ljava/lang/String;");
  98   jprocess_field_Process_bind = jxbt_get_jfield(env, jprocess_class_Process, "bind", "J");
  99   jprocess_field_Process_id = jxbt_get_jfield(env, jprocess_class_Process, "id", "J");
 100   jprocess_field_Process_pid = jxbt_get_jfield(env, jprocess_class_Process, "pid", "I");
 101   jprocess_field_Process_ppid = jxbt_get_jfield(env, jprocess_class_Process, "ppid", "I");
 102   jprocess_field_Process_host = jxbt_get_jfield(env, jprocess_class_Process, "host", "Lorg/simgrid/msg/Host;");
 103   jprocess_field_Process_killTime = jxbt_get_jfield(env, jprocess_class_Process, "killTime", "D");
 104   if (!jprocess_class_Process || !jprocess_field_Process_id || !jprocess_field_Process_name || !jprocess_field_Process_pid ||
 105       !jprocess_field_Process_ppid || !jprocess_field_Process_host) {
 106     jxbt_throw_native(env,bprintf("Can't find some fields in Java class. You should report this bug."));
 107   }
 108 }
 109 JNIEXPORT void JNICALL
 110 Java_org_simgrid_msg_Process_create(JNIEnv * env,
 111                                     jobject jprocess_arg,
 112                                     jobject jhostname)
 113 {
 114
 115
 116   jobject jprocess;             /* the global reference to the java process instance    */
 117   jstring jname;                /* the name of the java process instance                */
 118   const char *name;             /* the C name of the process                            */
 119   const char *hostname;
 120   msg_process_t process;          /* the native process to create                         */
 121   msg_host_t host;                /* Where that process lives */
 122
 123   hostname = (*env)->GetStringUTFChars(env, jhostname, 0);
 124
 125   /* get the name of the java process */
 126   jname = jprocess_get_name(jprocess_arg, env);
 127   if (!jname) {
 128     jxbt_throw_null(env,
 129             xbt_strdup("Internal error: Process name cannot be NULL"));
 130     return;
 131   }
 132
 133   /* bind/retrieve the msg host */
 134   host = MSG_get_host_by_name(hostname);
 135
 136   if (!(host)) {    /* not bound */
 137     jxbt_throw_host_not_found(env, hostname);
 138     return;
 139   }
 140
 141   /* create a global java process instance */
 142   jprocess = jprocess_new_global_ref(jprocess_arg, env);
 143   if (!jprocess) {
 144     jxbt_throw_jni(env, "Can't get a global ref to the java process");
 145     return;
 146   }
 147
 148   /* build the C name of the process */
 149   name = (*env)->GetStringUTFChars(env, jname, 0);
 150   name = xbt_strdup(name);
 151
 152   /* Retrieve the kill time from the process */
 153   jdouble jkill = (*env)->GetDoubleField(env, jprocess, jprocess_field_Process_killTime);
 154   /* Actually build the MSG process */
 155   process = MSG_process_create_with_environment(name,
 156                                                 (xbt_main_func_t) jprocess,
 157                                                 /*data*/ jprocess,
 158                                                 host,
 159                                                 /*argc, argv, properties*/
 160                                                 0,NULL,NULL);
 161   MSG_process_set_kill_time(process, (double)jkill);
 162   /* bind the java process instance to the native process */
 163   jprocess_bind(jprocess, process, env);
 164
 165   /* release our reference to the process name (variable name becomes invalid) */
 166   //FIXME : This line should be uncommented but with mac it doesn't work. BIG WARNING
 167   //(*env)->ReleaseStringUTFChars(env, jname, name);
 168   (*env)->ReleaseStringUTFChars(env, jhostname, hostname);
 169
 170   /* sets the PID and the PPID of the process */
 171   (*env)->SetIntField(env, jprocess, jprocess_field_Process_pid,(jint) MSG_process_get_PID(process));
 172   (*env)->SetIntField(env, jprocess, jprocess_field_Process_ppid, (jint) MSG_process_get_PPID(process));
 173   /* sets the Host of the process */
 174   jobject jhost = Java_org_simgrid_msg_Host_getByName(env,NULL,jhostname);
 175
 176   (*env)->SetObjectField(env, jprocess, jprocess_field_Process_host, jhost);
 177 }
 178
 179 JNIEXPORT jint JNICALL
 180 Java_org_simgrid_msg_Process_killAll(JNIEnv * env, jclass cls,
 181                                      jint jresetPID)
 182 {
 183   return (jint) MSG_process_killall((int) jresetPID);
 184 }
 185
 186 JNIEXPORT jobject JNICALL
 187 Java_org_simgrid_msg_Process_fromPID(JNIEnv * env, jclass cls,
 188                                      jint PID)
 189 {
 190   msg_process_t process = MSG_process_from_PID(PID);
 191
 192   if (!process) {
 193     jxbt_throw_process_not_found(env, bprintf("PID = %d",(int) PID));
 194     return NULL;
 195   }
 196
 197   jobject jprocess = native_to_java_process(process);
 198
 199   if (!jprocess) {
 200     jxbt_throw_jni(env, "get process failed");
 201     return NULL;
 202   }
 203
 204   return jprocess;
 205 }
 206 JNIEXPORT jobject JNICALL
 207 Java_org_simgrid_msg_Process_getProperty(JNIEnv *env, jobject jprocess, jobject jname) {
 208   msg_process_t process = jprocess_to_native_process(jprocess, env);
 209
 210   if (!process) {
 211     jxbt_throw_notbound(env, "process", jprocess);
 212     return NULL;
 213   }
 214   const char *name = (*env)->GetStringUTFChars(env, jname, 0);
 215
 216   const char *property = MSG_process_get_property_value(process, name);
 217   if (!property) {
 218     return NULL;
 219   }
 220
 221   jobject jproperty = (*env)->NewStringUTF(env, property);
 222
 223   (*env)->ReleaseStringUTFChars(env, jname, name);
 224
 225   return jproperty;
 226 }
 227 JNIEXPORT jobject JNICALL
 228 Java_org_simgrid_msg_Process_getCurrentProcess(JNIEnv * env, jclass cls)
 229 {
 230   msg_process_t process = MSG_process_self();
 231   jobject jprocess;
 232
 233   if (!process) {
 234     jxbt_throw_jni(env, xbt_strdup("MSG_process_self() failed"));
 235     return NULL;
 236   }
 237
 238   jprocess = native_to_java_process(process);
 239
 240   if (!jprocess)
 241     jxbt_throw_jni(env, xbt_strdup("SIMIX_process_get_jprocess() failed"));
 242
 243   return jprocess;
 244 }
 245
 246 JNIEXPORT void JNICALL
 247 Java_org_simgrid_msg_Process_suspend(JNIEnv * env,
 248                                    jobject jprocess)
 249 {
 250   msg_process_t process = jprocess_to_native_process(jprocess, env);
 251
 252   if (!process) {
 253     jxbt_throw_notbound(env, "process", jprocess);
 254     return;
 255   }
 256
 257   /* try to suspend the process */
 258   msg_error_t rv = MSG_process_suspend(process);
 259
 260   jxbt_check_res("MSG_process_suspend()", rv, MSG_OK,
 261                  bprintf("unexpected error , please report this bug"));
 262
 263 }
 264
 265 JNIEXPORT void JNICALL
 266 Java_org_simgrid_msg_Process_resume(JNIEnv * env,
 267                                      jobject jprocess)
 268 {
 269   msg_process_t process = jprocess_to_native_process(jprocess, env);
 270
 271   if (!process) {
 272     jxbt_throw_notbound(env, "process", jprocess);
 273     return;
 274   }
 275
 276   /* try to resume the process */
 277   msg_error_t rv = MSG_process_resume(process);
 278
 279   jxbt_check_res("MSG_process_resume()", rv, MSG_OK,
 280                  bprintf("unexpected error , please report this bug"));
 281 }
 282 JNIEXPORT void JNICALL
 283 Java_org_simgrid_msg_Process_setAutoRestart
 284     (JNIEnv *env, jobject jprocess, jboolean jauto_restart) {
 285   msg_process_t process = jprocess_to_native_process(jprocess, env);
 286   xbt_ex_t e;
 287
 288   int auto_restart = jauto_restart == JNI_TRUE ? 1 : 0;
 289
 290   if (!process) {
 291     jxbt_throw_notbound(env, "process", jprocess);
 292     return;
 293   }
 294
 295   TRY {
 296     MSG_process_auto_restart_set(process,auto_restart);
 297   }
 298   CATCH (e) {
 299     xbt_ex_free(e);
 300   }
 301 }
 302 JNIEXPORT void JNICALL
 303 Java_org_simgrid_msg_Process_restart
 304     (JNIEnv *env, jobject jprocess) {
 305   msg_process_t process = jprocess_to_native_process(jprocess, env);
 306   xbt_ex_t e;
 307
 308   if (!process) {
 309     jxbt_throw_notbound(env, "process", jprocess);
 310     return;
 311   }
 312
 313   TRY {
 314     MSG_process_restart(process);
 315   }
 316   CATCH (e) {
 317     xbt_ex_free(e);
 318   }
 319
 320 }
 321 JNIEXPORT jboolean JNICALL
 322 Java_org_simgrid_msg_Process_isSuspended(JNIEnv * env,
 323                                          jobject jprocess)
 324 {
 325   msg_process_t process = jprocess_to_native_process(jprocess, env);
 326
 327   if (!process) {
 328     jxbt_throw_notbound(env, "process", jprocess);
 329     return 0;
 330   }
 331
 332   /* true is the process is suspended, false otherwise */
 333   return (jboolean) MSG_process_is_suspended(process);
 334 }
 335
 336 JNIEXPORT void JNICALL
 337 Java_org_simgrid_msg_Process_sleep(JNIEnv *env, jclass cls, jlong jmillis, jint jnanos)
 338  {
 339   double time =  ((double)jmillis) / 1000 + ((double)jnanos) / 1000000000;
 340   msg_error_t rv;
 341   rv = MSG_process_sleep(time);
 342   if (rv != MSG_OK) {
 343     XBT_DEBUG("Something during the MSG_process_sleep invocation was wrong, trigger a HostFailureException");
 344
 345     //jmsg_throw_status(env,rv);
 346
 347     // adsein, the code above as been replaced by the code below. Indeed, according to the documentation, a sleep can only
 348     // trigger a host_failure exception. When the sleep crashes due to a host shutdown, the exception thrown by smx_context_java.c
 349     // is a cancelled_error, see bindings/java/smx_context_java.c, function void smx_ctx_java_stop(smx_context_t context) and src/msg/msg_gos.c
 350     // function  msg_error_t MSG_process_sleep(double nb_sec)
 351
 352     jxbt_throw_host_failure(env,NULL);
 353   }
 354 }
 355 JNIEXPORT void JNICALL
 356 Java_org_simgrid_msg_Process_waitFor(JNIEnv * env, jobject jprocess,
 357                                      jdouble jseconds)
 358 {
 359   msg_error_t rv;
 360   rv = MSG_process_sleep((double)jseconds);
 361   if ((*env)->ExceptionOccurred(env))
 362     return;
 363   if (rv != MSG_OK) {
 364     XBT_DEBUG("Status NOK");
 365     jmsg_throw_status(env,rv);
 366   }
 367 }
 368
 369 JNIEXPORT void JNICALL
 370 Java_org_simgrid_msg_Process_kill(JNIEnv * env,
 371                                   jobject jprocess)
 372 {
 373         /* get the native instances from the java ones */
 374   msg_process_t process = jprocess_to_native_process(jprocess, env);
 375   if (!process) {
 376     jxbt_throw_notbound(env, "process", jprocess);
 377     return;
 378   }
 379
 380         MSG_process_kill(process);
 381 }
 382 JNIEXPORT void JNICALL
 383 Java_org_simgrid_msg_Process_migrate(JNIEnv * env,
 384                                      jobject jprocess, jobject jhost)
 385 {
 386   msg_process_t process = jprocess_to_native_process(jprocess, env);
 387
 388   if (!process) {
 389     jxbt_throw_notbound(env, "process", jprocess);
 390     return;
 391   }
 392
 393   msg_host_t host = jhost_get_native(env, jhost);
 394
 395   if (!host) {
 396     jxbt_throw_notbound(env, "host", jhost);
 397     return;
 398   }
 399
 400   /* try to change the host of the process */
 401   msg_error_t rv = MSG_process_migrate(process, host);
 402   if (rv != MSG_OK) {
 403     jmsg_throw_status(env,rv);
 404     return;
 405   }
 406   /* change the host java side */
 407   (*env)->SetObjectField(env, jprocess, jprocess_field_Process_host, jhost);
 408 }
 409 JNIEXPORT void JNICALL
 410 Java_org_simgrid_msg_Process_setKillTime (JNIEnv *env , jobject jprocess, jdouble jkilltime) {
 411         msg_process_t process = jprocess_to_native_process(jprocess, env);
 412         MSG_process_set_kill_time(process, (double)jkilltime);
 413 }
 414
 415 JNIEXPORT jint JNICALL
 416 Java_org_simgrid_msg_Process_getCount(JNIEnv * env, jclass cls) {
 417   return (jint) MSG_process_get_number();
 418 }