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 = (simgrid::java::JavaContext*) MSG_process_get_smx_ctx(process);
36 return context->jprocess;
39 jobject jprocess_new_global_ref(jobject jprocess, JNIEnv * env)
41 return env->NewGlobalRef(jprocess);
44 void jprocess_delete_global_ref(jobject jprocess, JNIEnv * env)
46 env->DeleteGlobalRef(jprocess);
49 void jprocess_join(jobject jprocess, JNIEnv * env)
51 msg_process_t process = jprocess_to_native_process(jprocess,env);
52 simgrid::java::JavaContext* context = (simgrid::java::JavaContext*) MSG_process_get_smx_ctx(process);
53 xbt_os_thread_join(context->thread,nullptr);
56 msg_process_t jprocess_to_native_process(jobject jprocess, JNIEnv * env)
58 return (msg_process_t)(intptr_t)env->GetLongField(jprocess, jprocess_field_Process_bind);
61 void jprocess_bind(jobject jprocess, msg_process_t process, JNIEnv * env)
63 env->SetLongField(jprocess, jprocess_field_Process_bind, (intptr_t)process);
66 jlong jprocess_get_id(jobject jprocess, JNIEnv * env)
68 return (intptr_t)env->GetLongField(jprocess, jprocess_field_Process_id);
71 jstring jprocess_get_name(jobject jprocess, JNIEnv * env)
73 jstring jname = (jstring) env->GetObjectField(jprocess, jprocess_field_Process_name);
74 return (jstring) env->NewGlobalRef(jname);
77 jboolean jprocess_is_valid(jobject jprocess, JNIEnv * env)
79 jfieldID id = jxbt_get_sfield(env, "org/simgrid/msg/Process", "bind", "J");
84 return env->GetLongField(jprocess, id) ? JNI_TRUE : JNI_FALSE;
87 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_nativeInit(JNIEnv *env, jclass cls) {
88 jclass jprocess_class_Process = env->FindClass("org/simgrid/msg/Process");
90 jprocess_field_Process_name = jxbt_get_jfield(env, jprocess_class_Process, "name", "Ljava/lang/String;");
91 jprocess_field_Process_bind = jxbt_get_jfield(env, jprocess_class_Process, "bind", "J");
92 jprocess_field_Process_id = jxbt_get_jfield(env, jprocess_class_Process, "id", "J");
93 jprocess_field_Process_pid = jxbt_get_jfield(env, jprocess_class_Process, "pid", "I");
94 jprocess_field_Process_ppid = jxbt_get_jfield(env, jprocess_class_Process, "ppid", "I");
95 jprocess_field_Process_host = jxbt_get_jfield(env, jprocess_class_Process, "host", "Lorg/simgrid/msg/Host;");
96 jprocess_field_Process_killTime = jxbt_get_jfield(env, jprocess_class_Process, "killTime", "D");
97 if (!jprocess_class_Process || !jprocess_field_Process_id || !jprocess_field_Process_name ||
98 !jprocess_field_Process_pid || !jprocess_field_Process_ppid || !jprocess_field_Process_host) {
99 jxbt_throw_native(env,bprintf("Can't find some fields in Java class. You should report this bug."));
103 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_create(JNIEnv * env, jobject jprocess_arg, jobject jhostname)
105 jobject jprocess; /* the global reference to the java process instance */
106 jstring jname; /* the name of the java process instance */
107 const char *name; /* the C name of the process */
108 const char *hostname;
109 msg_process_t process; /* the native process to create */
110 msg_host_t host; /* Where that process lives */
112 hostname = env->GetStringUTFChars((jstring) jhostname, 0);
114 /* get the name of the java process */
115 jname = jprocess_get_name(jprocess_arg, env);
118 xbt_strdup("Internal error: Process name cannot be nullptr"));
122 /* bind/retrieve the msg host */
123 host = MSG_host_by_name(hostname);
125 if (!(host)) { /* not bound */
126 jxbt_throw_host_not_found(env, hostname);
130 /* create a global java process instance */
131 jprocess = jprocess_new_global_ref(jprocess_arg, env);
133 jxbt_throw_jni(env, "Can't get a global ref to the java process");
137 /* build the C name of the process */
138 name = env->GetStringUTFChars(jname, 0);
139 name = xbt_strdup(name);
141 /* Retrieve the kill time from the process */
142 jdouble jkill = env->GetDoubleField(jprocess, jprocess_field_Process_killTime);
143 /* Actually build the MSG process */
144 process = MSG_process_create_with_environment(name, [](int argc, char** argv) -> int {
145 smx_process_t process = SIMIX_process_self();
146 // This is the jprocess passed as environment.
147 // It would be simplet if we could use a closure.
148 jobject jprocess = (jobject) MSG_process_get_data(process);
149 simgrid::java::java_main_jprocess(jprocess);
153 /*argc, argv, properties*/
154 0, nullptr, nullptr);
155 MSG_process_set_kill_time(process, (double)jkill);
156 /* bind the java process instance to the native process */
157 jprocess_bind(jprocess, process, env);
159 /* release our reference to the process name (variable name becomes invalid) */
160 //FIXME : This line should be uncommented but with mac it doesn't work. BIG WARNING
161 //env->ReleaseStringUTFChars(jname, name);
162 env->ReleaseStringUTFChars((jstring) jhostname, hostname);
164 /* sets the PID and the PPID of the process */
165 env->SetIntField(jprocess, jprocess_field_Process_pid,(jint) MSG_process_get_PID(process));
166 env->SetIntField(jprocess, jprocess_field_Process_ppid, (jint) MSG_process_get_PPID(process));
167 /* sets the Host of the process */
168 jobject jhost = Java_org_simgrid_msg_Host_getByName(env,nullptr, (jstring)jhostname);
170 env->SetObjectField(jprocess, jprocess_field_Process_host, jhost);
173 JNIEXPORT jint JNICALL Java_org_simgrid_msg_Process_killAll(JNIEnv * env, jclass cls, jint jresetPID)
175 return (jint) MSG_process_killall((int) jresetPID);
178 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Process_fromPID(JNIEnv * env, jclass cls, jint PID)
180 msg_process_t process = MSG_process_from_PID(PID);
183 jxbt_throw_process_not_found(env, bprintf("PID = %d",(int) PID));
187 jobject jprocess = native_to_java_process(process);
190 jxbt_throw_jni(env, "get process failed");
197 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Process_getProperty(JNIEnv *env, jobject jprocess, jobject jname) {
198 msg_process_t process = jprocess_to_native_process(jprocess, env);
201 jxbt_throw_notbound(env, "process", jprocess);
204 const char *name = env->GetStringUTFChars((jstring)jname, 0);
206 const char *property = MSG_process_get_property_value(process, name);
211 jobject jproperty = env->NewStringUTF(property);
213 env->ReleaseStringUTFChars((jstring)jname, name);
218 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Process_getCurrentProcess(JNIEnv * env, jclass cls)
220 msg_process_t process = MSG_process_self();
224 jxbt_throw_jni(env, xbt_strdup("MSG_process_self() failed"));
228 jprocess = native_to_java_process(process);
231 jxbt_throw_jni(env, xbt_strdup("SIMIX_process_get_jprocess() failed"));
236 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_suspend(JNIEnv * env, jobject jprocess)
238 msg_process_t process = jprocess_to_native_process(jprocess, env);
241 jxbt_throw_notbound(env, "process", jprocess);
245 /* try to suspend the process */
246 msg_error_t rv = MSG_process_suspend(process);
248 jxbt_check_res("MSG_process_suspend()", rv, MSG_OK, bprintf("unexpected error , please report this bug"));
251 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_resume(JNIEnv * env, jobject jprocess)
253 msg_process_t process = jprocess_to_native_process(jprocess, env);
256 jxbt_throw_notbound(env, "process", jprocess);
260 /* try to resume the process */
261 msg_error_t rv = MSG_process_resume(process);
263 jxbt_check_res("MSG_process_resume()", rv, MSG_OK, bprintf("unexpected error , please report this bug"));
266 JNICALL Java_org_simgrid_msg_Process_setAutoRestart (JNIEnv *env, jobject jprocess, jboolean jauto_restart) {
267 msg_process_t process = jprocess_to_native_process(jprocess, env);
270 int auto_restart = jauto_restart == JNI_TRUE ? 1 : 0;
273 jxbt_throw_notbound(env, "process", jprocess);
278 MSG_process_auto_restart_set(process,auto_restart);
285 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_restart (JNIEnv *env, jobject jprocess) {
286 msg_process_t process = jprocess_to_native_process(jprocess, env);
290 jxbt_throw_notbound(env, "process", jprocess);
295 MSG_process_restart(process);
302 JNIEXPORT jboolean JNICALL Java_org_simgrid_msg_Process_isSuspended(JNIEnv * env, jobject jprocess)
304 msg_process_t process = jprocess_to_native_process(jprocess, env);
307 jxbt_throw_notbound(env, "process", jprocess);
311 /* true is the process is suspended, false otherwise */
312 return (jboolean) MSG_process_is_suspended(process);
315 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_sleep(JNIEnv *env, jclass cls, jlong jmillis, jint jnanos)
317 double time = ((double)jmillis) / 1000 + ((double)jnanos) / 1000000000;
319 rv = MSG_process_sleep(time);
321 XBT_DEBUG("Something during the MSG_process_sleep invocation was wrong, trigger a HostFailureException");
323 //jmsg_throw_status(env,rv);
325 // adsein, the code above as been replaced by the code below. Indeed, according to the documentation, a sleep can only
326 // trigger a host_failure exception. When the sleep crashes due to a host shutdown, the exception thrown by smx_context_java.c
327 // 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
328 // function msg_error_t MSG_process_sleep(double nb_sec)
330 jxbt_throw_host_failure(env,nullptr);
334 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_waitFor(JNIEnv * env, jobject jprocess, jdouble jseconds)
337 rv = MSG_process_sleep((double)jseconds);
338 if (env->ExceptionOccurred())
341 XBT_DEBUG("Status NOK");
342 jmsg_throw_status(env,rv);
346 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_kill(JNIEnv * env, jobject jprocess)
348 /* get the native instances from the java ones */
349 msg_process_t process = jprocess_to_native_process(jprocess, env);
351 jxbt_throw_notbound(env, "process", jprocess);
355 MSG_process_kill(process);
358 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_migrate(JNIEnv * env, jobject jprocess, jobject jhost)
360 msg_process_t process = jprocess_to_native_process(jprocess, env);
363 jxbt_throw_notbound(env, "process", jprocess);
367 msg_host_t host = jhost_get_native(env, jhost);
370 jxbt_throw_notbound(env, "host", jhost);
374 /* try to change the host of the process */
375 msg_error_t rv = MSG_process_migrate(process, host);
377 jmsg_throw_status(env,rv);
380 /* change the host java side */
381 env->SetObjectField(jprocess, jprocess_field_Process_host, jhost);
384 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_setKillTime (JNIEnv *env , jobject jprocess, jdouble jkilltime) {
385 msg_process_t process = jprocess_to_native_process(jprocess, env);
386 MSG_process_set_kill_time(process, (double)jkilltime);
389 JNIEXPORT jint JNICALL Java_org_simgrid_msg_Process_getCount(JNIEnv * env, jclass cls) {
390 return (jint) MSG_process_get_number();