1 /* Functions related to the java process instances. */
3 /* Copyright (c) 2007-2015. The SimGrid Team.
4 * All rights reserved. */
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. */
9 #include "jmsg_process.h"
12 #include "jmsg_host.h"
13 #include "jxbt_utilities.h"
14 #include "JavaContext.hpp"
16 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(jmsg);
20 jfieldID jprocess_field_Process_bind;
21 jfieldID jprocess_field_Process_host;
22 jfieldID jprocess_field_Process_killTime;
23 jfieldID jprocess_field_Process_id;
24 jfieldID jprocess_field_Process_name;
25 jfieldID jprocess_field_Process_pid;
26 jfieldID jprocess_field_Process_ppid;
28 JNIEXPORT void JNICALL
29 Java_org_simgrid_msg_Process_exit(JNIEnv *env, jobject jprocess) {
33 jobject native_to_java_process(msg_process_t process)
35 simgrid::java::JavaContext* context =
36 (simgrid::java::JavaContext*) MSG_process_get_smx_ctx(process);
37 return context->jprocess;
40 jobject jprocess_new_global_ref(jobject jprocess, JNIEnv * env)
42 return env->NewGlobalRef(jprocess);
45 void jprocess_delete_global_ref(jobject jprocess, JNIEnv * env)
47 env->DeleteGlobalRef(jprocess);
50 void jprocess_join(jobject jprocess, JNIEnv * env)
52 msg_process_t process = jprocess_to_native_process(jprocess,env);
53 simgrid::java::JavaContext* context =
54 (simgrid::java::JavaContext*) MSG_process_get_smx_ctx(process);
55 xbt_os_thread_join(context->thread,NULL);
58 msg_process_t jprocess_to_native_process(jobject jprocess, JNIEnv * env)
61 (msg_process_t)(intptr_t)env->GetLongField(jprocess,
62 jprocess_field_Process_bind);
65 void jprocess_bind(jobject jprocess, msg_process_t process, JNIEnv * env)
67 env->SetLongField(jprocess, jprocess_field_Process_bind,
71 jlong jprocess_get_id(jobject jprocess, JNIEnv * env)
74 (intptr_t)env->GetLongField(jprocess, jprocess_field_Process_id);
77 jstring jprocess_get_name(jobject jprocess, JNIEnv * env)
79 jstring jname = (jstring) env->GetObjectField(jprocess, jprocess_field_Process_name);
80 return (jstring) env->NewGlobalRef(jname);
83 jboolean jprocess_is_valid(jobject jprocess, JNIEnv * env)
85 jfieldID id = jxbt_get_sfield(env, "org/simgrid/msg/Process", "bind", "J");
90 return env->GetLongField(jprocess, id) ? JNI_TRUE : JNI_FALSE;
92 JNIEXPORT void JNICALL
93 Java_org_simgrid_msg_Process_nativeInit(JNIEnv *env, jclass cls) {
94 jclass jprocess_class_Process = env->FindClass("org/simgrid/msg/Process");
96 jprocess_field_Process_name = jxbt_get_jfield(env, jprocess_class_Process, "name", "Ljava/lang/String;");
97 jprocess_field_Process_bind = jxbt_get_jfield(env, jprocess_class_Process, "bind", "J");
98 jprocess_field_Process_id = jxbt_get_jfield(env, jprocess_class_Process, "id", "J");
99 jprocess_field_Process_pid = jxbt_get_jfield(env, jprocess_class_Process, "pid", "I");
100 jprocess_field_Process_ppid = jxbt_get_jfield(env, jprocess_class_Process, "ppid", "I");
101 jprocess_field_Process_host = jxbt_get_jfield(env, jprocess_class_Process, "host", "Lorg/simgrid/msg/Host;");
102 jprocess_field_Process_killTime = jxbt_get_jfield(env, jprocess_class_Process, "killTime", "D");
103 if (!jprocess_class_Process || !jprocess_field_Process_id || !jprocess_field_Process_name || !jprocess_field_Process_pid ||
104 !jprocess_field_Process_ppid || !jprocess_field_Process_host) {
105 jxbt_throw_native(env,bprintf("Can't find some fields in Java class. You should report this bug."));
109 JNIEXPORT void JNICALL
110 Java_org_simgrid_msg_Process_create(JNIEnv * env,
111 jobject jprocess_arg,
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 */
123 hostname = env->GetStringUTFChars((jstring) jhostname, 0);
125 /* get the name of the java process */
126 jname = jprocess_get_name(jprocess_arg, env);
129 xbt_strdup("Internal error: Process name cannot be NULL"));
133 /* bind/retrieve the msg host */
134 host = MSG_host_by_name(hostname);
136 if (!(host)) { /* not bound */
137 jxbt_throw_host_not_found(env, hostname);
141 /* create a global java process instance */
142 jprocess = jprocess_new_global_ref(jprocess_arg, env);
144 jxbt_throw_jni(env, "Can't get a global ref to the java process");
148 /* build the C name of the process */
149 name = env->GetStringUTFChars(jname, 0);
150 name = xbt_strdup(name);
152 /* Retrieve the kill time from the process */
153 jdouble jkill = env->GetDoubleField(jprocess, jprocess_field_Process_killTime);
154 /* Actually build the MSG process */
155 process = MSG_process_create_with_environment(name,
156 [](int argc, char** argv) -> int {
157 smx_process_t process = SIMIX_process_self();
158 // This is the jprocess passed as environment.
159 // It would be simplet if we could use a closure.
160 jobject jprocess = (jobject) MSG_process_get_data(process);
161 simgrid::java::java_main_jprocess(jprocess);
165 /*argc, argv, properties*/
167 MSG_process_set_kill_time(process, (double)jkill);
168 /* bind the java process instance to the native process */
169 jprocess_bind(jprocess, process, env);
171 /* release our reference to the process name (variable name becomes invalid) */
172 //FIXME : This line should be uncommented but with mac it doesn't work. BIG WARNING
173 //env->ReleaseStringUTFChars(jname, name);
174 env->ReleaseStringUTFChars((jstring) jhostname, hostname);
176 /* sets the PID and the PPID of the process */
177 env->SetIntField(jprocess, jprocess_field_Process_pid,(jint) MSG_process_get_PID(process));
178 env->SetIntField(jprocess, jprocess_field_Process_ppid, (jint) MSG_process_get_PPID(process));
179 /* sets the Host of the process */
180 jobject jhost = Java_org_simgrid_msg_Host_getByName(env,NULL, (jstring)jhostname);
182 env->SetObjectField(jprocess, jprocess_field_Process_host, jhost);
185 JNIEXPORT jint JNICALL
186 Java_org_simgrid_msg_Process_killAll(JNIEnv * env, jclass cls,
189 return (jint) MSG_process_killall((int) jresetPID);
192 JNIEXPORT jobject JNICALL
193 Java_org_simgrid_msg_Process_fromPID(JNIEnv * env, jclass cls,
196 msg_process_t process = MSG_process_from_PID(PID);
199 jxbt_throw_process_not_found(env, bprintf("PID = %d",(int) PID));
203 jobject jprocess = native_to_java_process(process);
206 jxbt_throw_jni(env, "get process failed");
212 JNIEXPORT jobject JNICALL
213 Java_org_simgrid_msg_Process_getProperty(JNIEnv *env, jobject jprocess, jobject jname) {
214 msg_process_t process = jprocess_to_native_process(jprocess, env);
217 jxbt_throw_notbound(env, "process", jprocess);
220 const char *name = env->GetStringUTFChars((jstring)jname, 0);
222 const char *property = MSG_process_get_property_value(process, name);
227 jobject jproperty = env->NewStringUTF(property);
229 env->ReleaseStringUTFChars((jstring)jname, name);
233 JNIEXPORT jobject JNICALL
234 Java_org_simgrid_msg_Process_getCurrentProcess(JNIEnv * env, jclass cls)
236 msg_process_t process = MSG_process_self();
240 jxbt_throw_jni(env, xbt_strdup("MSG_process_self() failed"));
244 jprocess = native_to_java_process(process);
247 jxbt_throw_jni(env, xbt_strdup("SIMIX_process_get_jprocess() failed"));
252 JNIEXPORT void JNICALL
253 Java_org_simgrid_msg_Process_suspend(JNIEnv * env,
256 msg_process_t process = jprocess_to_native_process(jprocess, env);
259 jxbt_throw_notbound(env, "process", jprocess);
263 /* try to suspend the process */
264 msg_error_t rv = MSG_process_suspend(process);
266 jxbt_check_res("MSG_process_suspend()", rv, MSG_OK,
267 bprintf("unexpected error , please report this bug"));
271 JNIEXPORT void JNICALL
272 Java_org_simgrid_msg_Process_resume(JNIEnv * env,
275 msg_process_t process = jprocess_to_native_process(jprocess, env);
278 jxbt_throw_notbound(env, "process", jprocess);
282 /* try to resume the process */
283 msg_error_t rv = MSG_process_resume(process);
285 jxbt_check_res("MSG_process_resume()", rv, MSG_OK,
286 bprintf("unexpected error , please report this bug"));
288 JNIEXPORT void JNICALL
289 Java_org_simgrid_msg_Process_setAutoRestart
290 (JNIEnv *env, jobject jprocess, jboolean jauto_restart) {
291 msg_process_t process = jprocess_to_native_process(jprocess, env);
294 int auto_restart = jauto_restart == JNI_TRUE ? 1 : 0;
297 jxbt_throw_notbound(env, "process", jprocess);
302 MSG_process_auto_restart_set(process,auto_restart);
308 JNIEXPORT void JNICALL
309 Java_org_simgrid_msg_Process_restart
310 (JNIEnv *env, jobject jprocess) {
311 msg_process_t process = jprocess_to_native_process(jprocess, env);
315 jxbt_throw_notbound(env, "process", jprocess);
320 MSG_process_restart(process);
327 JNIEXPORT jboolean JNICALL
328 Java_org_simgrid_msg_Process_isSuspended(JNIEnv * env,
331 msg_process_t process = jprocess_to_native_process(jprocess, env);
334 jxbt_throw_notbound(env, "process", jprocess);
338 /* true is the process is suspended, false otherwise */
339 return (jboolean) MSG_process_is_suspended(process);
342 JNIEXPORT void JNICALL
343 Java_org_simgrid_msg_Process_sleep(JNIEnv *env, jclass cls, jlong jmillis, jint jnanos)
345 double time = ((double)jmillis) / 1000 + ((double)jnanos) / 1000000000;
347 rv = MSG_process_sleep(time);
349 XBT_DEBUG("Something during the MSG_process_sleep invocation was wrong, trigger a HostFailureException");
351 //jmsg_throw_status(env,rv);
353 // adsein, the code above as been replaced by the code below. Indeed, according to the documentation, a sleep can only
354 // trigger a host_failure exception. When the sleep crashes due to a host shutdown, the exception thrown by smx_context_java.c
355 // 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
356 // function msg_error_t MSG_process_sleep(double nb_sec)
358 jxbt_throw_host_failure(env,NULL);
361 JNIEXPORT void JNICALL
362 Java_org_simgrid_msg_Process_waitFor(JNIEnv * env, jobject jprocess,
366 rv = MSG_process_sleep((double)jseconds);
367 if (env->ExceptionOccurred())
370 XBT_DEBUG("Status NOK");
371 jmsg_throw_status(env,rv);
375 JNIEXPORT void JNICALL
376 Java_org_simgrid_msg_Process_kill(JNIEnv * env,
379 /* get the native instances from the java ones */
380 msg_process_t process = jprocess_to_native_process(jprocess, env);
382 jxbt_throw_notbound(env, "process", jprocess);
386 MSG_process_kill(process);
388 JNIEXPORT void JNICALL
389 Java_org_simgrid_msg_Process_migrate(JNIEnv * env,
390 jobject jprocess, jobject jhost)
392 msg_process_t process = jprocess_to_native_process(jprocess, env);
395 jxbt_throw_notbound(env, "process", jprocess);
399 msg_host_t host = jhost_get_native(env, jhost);
402 jxbt_throw_notbound(env, "host", jhost);
406 /* try to change the host of the process */
407 msg_error_t rv = MSG_process_migrate(process, host);
409 jmsg_throw_status(env,rv);
412 /* change the host java side */
413 env->SetObjectField(jprocess, jprocess_field_Process_host, jhost);
415 JNIEXPORT void JNICALL
416 Java_org_simgrid_msg_Process_setKillTime (JNIEnv *env , jobject jprocess, jdouble jkilltime) {
417 msg_process_t process = jprocess_to_native_process(jprocess, env);
418 MSG_process_set_kill_time(process, (double)jkilltime);
421 JNIEXPORT jint JNICALL
422 Java_org_simgrid_msg_Process_getCount(JNIEnv * env, jclass cls) {
423 return (jint) MSG_process_get_number();