src/bindings/java/jmsg_process.c

   1 /* Functions related to the java process instances.                         */
   2
   3 /* Copyright (c) 2007-2015. 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
  16 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(jmsg);
  17
  18 jfieldID jprocess_field_Process_bind;
  19 jfieldID jprocess_field_Process_host;
  20 jfieldID jprocess_field_Process_killTime;
  21 jfieldID jprocess_field_Process_id;
  22 jfieldID jprocess_field_Process_name;
  23 jfieldID jprocess_field_Process_pid;
  24 jfieldID jprocess_field_Process_ppid;
  25
  26 JNIEXPORT void JNICALL
  27 Java_org_simgrid_msg_Process_exit(JNIEnv *env, jobject jprocess) {
  28
  29 }
  30
  31 jobject native_to_java_process(msg_process_t process)
  32 {
  33   return ((smx_ctx_java_t)MSG_process_get_smx_ctx(process))->jprocess;
  34 }
  35
  36 jobject jprocess_new_global_ref(jobject jprocess, JNIEnv * env)
  37 {
  38   return (*env)->NewGlobalRef(env, jprocess);
  39 }
  40
  41 void jprocess_delete_global_ref(jobject jprocess, JNIEnv * env)
  42 {
  43   (*env)->DeleteGlobalRef(env, jprocess);
  44 }
  45
  46 void jprocess_join(jobject jprocess, JNIEnv * env)
  47 {
  48         msg_process_t process = jprocess_to_native_process(jprocess,env);
  49         smx_ctx_java_t context = (smx_ctx_java_t)MSG_process_get_smx_ctx(process);
  50         xbt_os_thread_join(context->thread,NULL);
  51 }
  52
  53 msg_process_t jprocess_to_native_process(jobject jprocess, JNIEnv * env)
  54 {
  55   return
  56     (msg_process_t)(intptr_t)(*env)->GetLongField(env, jprocess,
  57                                                   jprocess_field_Process_bind);
  58 }
  59
  60 void jprocess_bind(jobject jprocess, msg_process_t process, JNIEnv * env)
  61 {
  62   (*env)->SetLongField(env, jprocess, jprocess_field_Process_bind,
  63                        (intptr_t)process);
  64 }
  65
  66 jlong jprocess_get_id(jobject jprocess, JNIEnv * env)
  67 {
  68   return
  69     (intptr_t)(*env)->GetLongField(env, jprocess, jprocess_field_Process_id);
  70 }
  71
  72 jstring jprocess_get_name(jobject jprocess, JNIEnv * env)
  73 {
  74   jstring jname = (jstring) (*env)->GetObjectField(env, jprocess, jprocess_field_Process_name);
  75   return (*env)->NewGlobalRef(env, jname);
  76
  77 }
  78
  79 jboolean jprocess_is_valid(jobject jprocess, JNIEnv * env)
  80 {
  81   jfieldID id = jxbt_get_sfield(env, "org/simgrid/msg/Process", "bind", "J");
  82
  83   if (!id)
  84     return JNI_FALSE;
  85
  86   return (*env)->GetLongField(env, jprocess, id) ? JNI_TRUE : JNI_FALSE;
  87 }
  88 JNIEXPORT void JNICALL
  89 Java_org_simgrid_msg_Process_nativeInit(JNIEnv *env, jclass cls) {
  90   jclass jprocess_class_Process = (*env)->FindClass(env, "org/simgrid/msg/Process");
  91
  92   jprocess_field_Process_name = jxbt_get_jfield(env, jprocess_class_Process, "name", "Ljava/lang/String;");
  93   jprocess_field_Process_bind = jxbt_get_jfield(env, jprocess_class_Process, "bind", "J");
  94   jprocess_field_Process_id = jxbt_get_jfield(env, jprocess_class_Process, "id", "J");
  95   jprocess_field_Process_pid = jxbt_get_jfield(env, jprocess_class_Process, "pid", "I");
  96   jprocess_field_Process_ppid = jxbt_get_jfield(env, jprocess_class_Process, "ppid", "I");
  97   jprocess_field_Process_host = jxbt_get_jfield(env, jprocess_class_Process, "host", "Lorg/simgrid/msg/Host;");
  98   jprocess_field_Process_killTime = jxbt_get_jfield(env, jprocess_class_Process, "killTime", "D");
  99   if (!jprocess_class_Process || !jprocess_field_Process_id || !jprocess_field_Process_name || !jprocess_field_Process_pid ||
 100       !jprocess_field_Process_ppid || !jprocess_field_Process_host) {
 101     jxbt_throw_native(env,bprintf("Can't find some fields in Java class. You should report this bug."));
 102   }
 103 }
 104 JNIEXPORT void JNICALL
 105 Java_org_simgrid_msg_Process_create(JNIEnv * env,
 106                                     jobject jprocess_arg,
 107                                     jobject jhostname)
 108 {
 109
 110
 111   jobject jprocess;             /* the global reference to the java process instance    */
 112   jstring jname;                /* the name of the java process instance                */
 113   const char *name;             /* the C name of the process                            */
 114   const char *hostname;
 115   msg_process_t process;          /* the native process to create                         */
 116   msg_host_t host;                /* Where that process lives */
 117
 118   hostname = (*env)->GetStringUTFChars(env, jhostname, 0);
 119
 120   /* get the name of the java process */
 121   jname = jprocess_get_name(jprocess_arg, env);
 122   if (!jname) {
 123     jxbt_throw_null(env,
 124             xbt_strdup("Internal error: Process name cannot be NULL"));
 125     return;
 126   }
 127
 128   /* bind/retrieve the msg host */
 129   host = MSG_host_by_name(hostname);
 130
 131   if (!(host)) {    /* not bound */
 132     jxbt_throw_host_not_found(env, hostname);
 133     return;
 134   }
 135
 136   /* create a global java process instance */
 137   jprocess = jprocess_new_global_ref(jprocess_arg, env);
 138   if (!jprocess) {
 139     jxbt_throw_jni(env, "Can't get a global ref to the java process");
 140     return;
 141   }
 142
 143   /* build the C name of the process */
 144   name = (*env)->GetStringUTFChars(env, jname, 0);
 145   name = xbt_strdup(name);
 146
 147   /* Retrieve the kill time from the process */
 148   jdouble jkill = (*env)->GetDoubleField(env, jprocess, jprocess_field_Process_killTime);
 149   /* Actually build the MSG process */
 150   process = MSG_process_create_with_environment(name,
 151                                                 (xbt_main_func_t) jprocess,
 152                                                 /*data*/ jprocess,
 153                                                 host,
 154                                                 /*argc, argv, properties*/
 155                                                 0,NULL,NULL);
 156   MSG_process_set_kill_time(process, (double)jkill);
 157   /* bind the java process instance to the native process */
 158   jprocess_bind(jprocess, process, env);
 159
 160   /* release our reference to the process name (variable name becomes invalid) */
 161   //FIXME : This line should be uncommented but with mac it doesn't work. BIG WARNING
 162   //(*env)->ReleaseStringUTFChars(env, jname, name);
 163   (*env)->ReleaseStringUTFChars(env, jhostname, hostname);
 164
 165   /* sets the PID and the PPID of the process */
 166   (*env)->SetIntField(env, jprocess, jprocess_field_Process_pid,(jint) MSG_process_get_PID(process));
 167   (*env)->SetIntField(env, jprocess, jprocess_field_Process_ppid, (jint) MSG_process_get_PPID(process));
 168   /* sets the Host of the process */
 169   jobject jhost = Java_org_simgrid_msg_Host_getByName(env,NULL,jhostname);
 170
 171   (*env)->SetObjectField(env, jprocess, jprocess_field_Process_host, jhost);
 172 }
 173
 174 JNIEXPORT jint JNICALL
 175 Java_org_simgrid_msg_Process_killAll(JNIEnv * env, jclass cls,
 176                                      jint jresetPID)
 177 {
 178   return (jint) MSG_process_killall((int) jresetPID);
 179 }
 180
 181 JNIEXPORT jobject JNICALL
 182 Java_org_simgrid_msg_Process_fromPID(JNIEnv * env, jclass cls,
 183                                      jint PID)
 184 {
 185   msg_process_t process = MSG_process_from_PID(PID);
 186
 187   if (!process) {
 188     jxbt_throw_process_not_found(env, bprintf("PID = %d",(int) PID));
 189     return NULL;
 190   }
 191
 192   jobject jprocess = native_to_java_process(process);
 193
 194   if (!jprocess) {
 195     jxbt_throw_jni(env, "get process failed");
 196     return NULL;
 197   }
 198
 199   return jprocess;
 200 }
 201 JNIEXPORT jobject JNICALL
 202 Java_org_simgrid_msg_Process_getProperty(JNIEnv *env, jobject jprocess, jobject jname) {
 203   msg_process_t process = jprocess_to_native_process(jprocess, env);
 204
 205   if (!process) {
 206     jxbt_throw_notbound(env, "process", jprocess);
 207     return NULL;
 208   }
 209   const char *name = (*env)->GetStringUTFChars(env, jname, 0);
 210
 211   const char *property = MSG_process_get_property_value(process, name);
 212   if (!property) {
 213     return NULL;
 214   }
 215
 216   jobject jproperty = (*env)->NewStringUTF(env, property);
 217
 218   (*env)->ReleaseStringUTFChars(env, jname, name);
 219
 220   return jproperty;
 221 }
 222 JNIEXPORT jobject JNICALL
 223 Java_org_simgrid_msg_Process_getCurrentProcess(JNIEnv * env, jclass cls)
 224 {
 225   msg_process_t process = MSG_process_self();
 226   jobject jprocess;
 227
 228   if (!process) {
 229     jxbt_throw_jni(env, xbt_strdup("MSG_process_self() failed"));
 230     return NULL;
 231   }
 232
 233   jprocess = native_to_java_process(process);
 234
 235   if (!jprocess)
 236     jxbt_throw_jni(env, xbt_strdup("SIMIX_process_get_jprocess() failed"));
 237
 238   return jprocess;
 239 }
 240
 241 JNIEXPORT void JNICALL
 242 Java_org_simgrid_msg_Process_suspend(JNIEnv * env,
 243                                    jobject jprocess)
 244 {
 245   msg_process_t process = jprocess_to_native_process(jprocess, env);
 246
 247   if (!process) {
 248     jxbt_throw_notbound(env, "process", jprocess);
 249     return;
 250   }
 251
 252   /* try to suspend the process */
 253   msg_error_t rv = MSG_process_suspend(process);
 254
 255   jxbt_check_res("MSG_process_suspend()", rv, MSG_OK,
 256                  bprintf("unexpected error , please report this bug"));
 257
 258 }
 259
 260 JNIEXPORT void JNICALL
 261 Java_org_simgrid_msg_Process_resume(JNIEnv * env,
 262                                      jobject jprocess)
 263 {
 264   msg_process_t process = jprocess_to_native_process(jprocess, env);
 265
 266   if (!process) {
 267     jxbt_throw_notbound(env, "process", jprocess);
 268     return;
 269   }
 270
 271   /* try to resume the process */
 272   msg_error_t rv = MSG_process_resume(process);
 273
 274   jxbt_check_res("MSG_process_resume()", rv, MSG_OK,
 275                  bprintf("unexpected error , please report this bug"));
 276 }
 277 JNIEXPORT void JNICALL
 278 Java_org_simgrid_msg_Process_setAutoRestart
 279     (JNIEnv *env, jobject jprocess, jboolean jauto_restart) {
 280   msg_process_t process = jprocess_to_native_process(jprocess, env);
 281   xbt_ex_t e;
 282
 283   int auto_restart = jauto_restart == JNI_TRUE ? 1 : 0;
 284
 285   if (!process) {
 286     jxbt_throw_notbound(env, "process", jprocess);
 287     return;
 288   }
 289
 290   TRY {
 291     MSG_process_auto_restart_set(process,auto_restart);
 292   }
 293   CATCH (e) {
 294     xbt_ex_free(e);
 295   }
 296 }
 297 JNIEXPORT void JNICALL
 298 Java_org_simgrid_msg_Process_restart
 299     (JNIEnv *env, jobject jprocess) {
 300   msg_process_t process = jprocess_to_native_process(jprocess, env);
 301   xbt_ex_t e;
 302
 303   if (!process) {
 304     jxbt_throw_notbound(env, "process", jprocess);
 305     return;
 306   }
 307
 308   TRY {
 309     MSG_process_restart(process);
 310   }
 311   CATCH (e) {
 312     xbt_ex_free(e);
 313   }
 314
 315 }
 316 JNIEXPORT jboolean JNICALL
 317 Java_org_simgrid_msg_Process_isSuspended(JNIEnv * env,
 318                                          jobject jprocess)
 319 {
 320   msg_process_t process = jprocess_to_native_process(jprocess, env);
 321
 322   if (!process) {
 323     jxbt_throw_notbound(env, "process", jprocess);
 324     return 0;
 325   }
 326
 327   /* true is the process is suspended, false otherwise */
 328   return (jboolean) MSG_process_is_suspended(process);
 329 }
 330
 331 JNIEXPORT void JNICALL
 332 Java_org_simgrid_msg_Process_sleep(JNIEnv *env, jclass cls, jlong jmillis, jint jnanos)
 333  {
 334   double time =  ((double)jmillis) / 1000 + ((double)jnanos) / 1000000000;
 335   msg_error_t rv;
 336   rv = MSG_process_sleep(time);
 337   if (rv != MSG_OK) {
 338     XBT_DEBUG("Something during the MSG_process_sleep invocation was wrong, trigger a HostFailureException");
 339
 340     //jmsg_throw_status(env,rv);
 341
 342     // adsein, the code above as been replaced by the code below. Indeed, according to the documentation, a sleep can only
 343     // trigger a host_failure exception. When the sleep crashes due to a host shutdown, the exception thrown by smx_context_java.c
 344     // 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
 345     // function  msg_error_t MSG_process_sleep(double nb_sec)
 346
 347     jxbt_throw_host_failure(env,NULL);
 348   }
 349 }
 350 JNIEXPORT void JNICALL
 351 Java_org_simgrid_msg_Process_waitFor(JNIEnv * env, jobject jprocess,
 352                                      jdouble jseconds)
 353 {
 354   msg_error_t rv;
 355   rv = MSG_process_sleep((double)jseconds);
 356   if ((*env)->ExceptionOccurred(env))
 357     return;
 358   if (rv != MSG_OK) {
 359     XBT_DEBUG("Status NOK");
 360     jmsg_throw_status(env,rv);
 361   }
 362 }
 363
 364 JNIEXPORT void JNICALL
 365 Java_org_simgrid_msg_Process_kill(JNIEnv * env,
 366                                   jobject jprocess)
 367 {
 368         /* get the native instances from the java ones */
 369   msg_process_t process = jprocess_to_native_process(jprocess, env);
 370   if (!process) {
 371     jxbt_throw_notbound(env, "process", jprocess);
 372     return;
 373   }
 374
 375         MSG_process_kill(process);
 376 }
 377 JNIEXPORT void JNICALL
 378 Java_org_simgrid_msg_Process_migrate(JNIEnv * env,
 379                                      jobject jprocess, jobject jhost)
 380 {
 381   msg_process_t process = jprocess_to_native_process(jprocess, env);
 382
 383   if (!process) {
 384     jxbt_throw_notbound(env, "process", jprocess);
 385     return;
 386   }
 387
 388   msg_host_t host = jhost_get_native(env, jhost);
 389
 390   if (!host) {
 391     jxbt_throw_notbound(env, "host", jhost);
 392     return;
 393   }
 394
 395   /* try to change the host of the process */
 396   msg_error_t rv = MSG_process_migrate(process, host);
 397   if (rv != MSG_OK) {
 398     jmsg_throw_status(env,rv);
 399     return;
 400   }
 401   /* change the host java side */
 402   (*env)->SetObjectField(env, jprocess, jprocess_field_Process_host, jhost);
 403 }
 404 JNIEXPORT void JNICALL
 405 Java_org_simgrid_msg_Process_setKillTime (JNIEnv *env , jobject jprocess, jdouble jkilltime) {
 406         msg_process_t process = jprocess_to_native_process(jprocess, env);
 407         MSG_process_set_kill_time(process, (double)jkilltime);
 408 }
 409
 410 JNIEXPORT jint JNICALL
 411 Java_org_simgrid_msg_Process_getCount(JNIEnv * env, jclass cls) {
 412   return (jint) MSG_process_get_number();
 413 }