1 /* Functions related to the java process instances. */
3 /* Copyright (c) 2007-2017. The SimGrid Team. All rights reserved. */
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. */
10 #include "jmsg_process.h"
13 #include "jmsg_host.h"
14 #include "jxbt_utilities.h"
15 #include "JavaContext.hpp"
17 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(jmsg);
21 jfieldID jprocess_field_Process_bind;
22 jfieldID jprocess_field_Process_host;
23 jfieldID jprocess_field_Process_killTime;
24 // jfieldID jprocess_field_Process_id;
25 jfieldID jprocess_field_Process_name;
26 jfieldID jprocess_field_Process_pid;
27 jfieldID jprocess_field_Process_ppid;
29 jobject jprocess_from_native(msg_process_t process)
31 simgrid::kernel::context::JavaContext* context = (simgrid::kernel::context::JavaContext*) MSG_process_get_smx_ctx(process);
32 return context->jprocess;
35 jobject jprocess_ref(jobject jprocess, JNIEnv* env)
37 return env->NewGlobalRef(jprocess);
40 void jprocess_unref(jobject jprocess, JNIEnv* env)
42 env->DeleteGlobalRef(jprocess);
45 msg_process_t jprocess_to_native(jobject jprocess, JNIEnv* env)
47 return (msg_process_t)(intptr_t)env->GetLongField(jprocess, jprocess_field_Process_bind);
50 void jprocess_bind(jobject jprocess, msg_process_t process, JNIEnv * env)
52 env->SetLongField(jprocess, jprocess_field_Process_bind, (intptr_t)process);
55 jstring jprocess_get_name(jobject jprocess, JNIEnv * env)
57 jstring jname = (jstring) env->GetObjectField(jprocess, jprocess_field_Process_name);
58 return (jstring) env->NewGlobalRef(jname);
61 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_nativeInit(JNIEnv *env, jclass cls) {
62 jclass jprocess_class_Process = env->FindClass("org/simgrid/msg/Process");
63 xbt_assert(jprocess_class_Process, "Native initialization of msg/Process failed. Please report that bug");
65 jprocess_field_Process_name = jxbt_get_jfield(env, jprocess_class_Process, "name", "Ljava/lang/String;");
66 jprocess_field_Process_bind = jxbt_get_jfield(env, jprocess_class_Process, "bind", "J");
67 jprocess_field_Process_pid = jxbt_get_jfield(env, jprocess_class_Process, "pid", "I");
68 jprocess_field_Process_ppid = jxbt_get_jfield(env, jprocess_class_Process, "ppid", "I");
69 jprocess_field_Process_host = jxbt_get_jfield(env, jprocess_class_Process, "host", "Lorg/simgrid/msg/Host;");
70 jprocess_field_Process_killTime = jxbt_get_jfield(env, jprocess_class_Process, "killTime", "D");
71 xbt_assert(jprocess_field_Process_name && jprocess_field_Process_pid && jprocess_field_Process_ppid &&
72 jprocess_field_Process_host,
73 "Native initialization of msg/Process failed. Please report that bug");
76 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_create(JNIEnv * env, jobject jprocess_arg, jobject jhostname)
78 jobject jprocess; /* the global reference to the java process instance */
79 jstring jname; /* the name of the java process instance */
80 const char *name; /* the C name of the process */
82 msg_process_t process; /* the native process to create */
83 msg_host_t host; /* Where that process lives */
85 hostname = env->GetStringUTFChars((jstring) jhostname, 0);
87 /* get the name of the java process */
88 jname = jprocess_get_name(jprocess_arg, env);
91 xbt_strdup("Internal error: Process name cannot be nullptr"));
95 /* bind/retrieve the msg host */
96 host = MSG_host_by_name(hostname);
98 if (!(host)) { /* not bound */
99 jxbt_throw_host_not_found(env, hostname);
103 /* create a global java process instance */
104 jprocess = jprocess_ref(jprocess_arg, env);
106 jxbt_throw_jni(env, "Can't get a global ref to the java process");
110 /* build the C name of the process */
111 name = env->GetStringUTFChars(jname, 0);
112 name = xbt_strdup(name);
114 /* Retrieve the kill time from the process */
115 jdouble jkill = env->GetDoubleField(jprocess, jprocess_field_Process_killTime);
116 /* Actually build the MSG process */
117 process = MSG_process_create_with_environment(name, [](int argc, char** argv) -> int {
118 smx_actor_t process = SIMIX_process_self();
119 // This is the jprocess passed as environment.
120 // It would be simplet if we could use a closure.
121 jobject jprocess = (jobject) MSG_process_get_data(process);
122 simgrid::kernel::context::java_main_jprocess(jprocess);
126 /*argc, argv, properties*/
127 0, nullptr, nullptr);
128 MSG_process_set_kill_time(process, (double)jkill);
129 /* bind the java process instance to the native process */
130 jprocess_bind(jprocess, process, env);
132 /* release our reference to the process name (variable name becomes invalid) */
133 //FIXME : This line should be uncommented but with mac it doesn't work. BIG WARNING
134 //env->ReleaseStringUTFChars(jname, name);
135 env->ReleaseStringUTFChars((jstring) jhostname, hostname);
137 /* sets the PID and the PPID of the process */
138 env->SetIntField(jprocess, jprocess_field_Process_pid,(jint) MSG_process_get_PID(process));
139 env->SetIntField(jprocess, jprocess_field_Process_ppid, (jint) MSG_process_get_PPID(process));
140 /* sets the Host of the process */
141 jobject jhost = Java_org_simgrid_msg_Host_getByName(env,nullptr, (jstring)jhostname);
143 env->SetObjectField(jprocess, jprocess_field_Process_host, jhost);
146 JNIEXPORT jint JNICALL Java_org_simgrid_msg_Process_killAll(JNIEnv * env, jclass cls, jint jresetPID)
148 return (jint) MSG_process_killall((int) jresetPID);
151 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Process_fromPID(JNIEnv * env, jclass cls, jint pid)
153 msg_process_t process = MSG_process_from_PID(pid);
156 jxbt_throw_process_not_found(env, bprintf("PID = %d",static_cast<int>(pid)));
160 jobject jprocess = jprocess_from_native(process);
163 jxbt_throw_jni(env, "get process failed");
170 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Process_getProperty(JNIEnv *env, jobject jprocess, jobject jname) {
171 msg_process_t process = jprocess_to_native(jprocess, env);
174 jxbt_throw_notbound(env, "process", jprocess);
177 const char *name = env->GetStringUTFChars((jstring)jname, 0);
179 const char *property = MSG_process_get_property_value(process, name);
184 jobject jproperty = env->NewStringUTF(property);
186 env->ReleaseStringUTFChars((jstring)jname, name);
191 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Process_getCurrentProcess(JNIEnv * env, jclass cls)
193 msg_process_t process = MSG_process_self();
197 jxbt_throw_jni(env, xbt_strdup("MSG_process_self() failed"));
201 jprocess = jprocess_from_native(process);
204 jxbt_throw_jni(env, xbt_strdup("SIMIX_process_get_jprocess() failed"));
209 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_suspend(JNIEnv * env, jobject jprocess)
211 msg_process_t process = jprocess_to_native(jprocess, env);
214 jxbt_throw_notbound(env, "process", jprocess);
218 /* try to suspend the process */
219 msg_error_t rv = MSG_process_suspend(process);
221 jxbt_check_res("MSG_process_suspend()", rv, MSG_OK, bprintf("unexpected error , please report this bug"));
224 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_resume(JNIEnv * env, jobject jprocess)
226 msg_process_t process = jprocess_to_native(jprocess, env);
229 jxbt_throw_notbound(env, "process", jprocess);
233 /* try to resume the process */
234 msg_error_t rv = MSG_process_resume(process);
236 jxbt_check_res("MSG_process_resume()", rv, MSG_OK, bprintf("unexpected error , please report this bug"));
239 JNICALL Java_org_simgrid_msg_Process_setAutoRestart (JNIEnv *env, jobject jprocess, jboolean jauto_restart) {
240 msg_process_t process = jprocess_to_native(jprocess, env);
243 int auto_restart = jauto_restart == JNI_TRUE ? 1 : 0;
246 jxbt_throw_notbound(env, "process", jprocess);
251 MSG_process_auto_restart_set(process,auto_restart);
258 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_restart (JNIEnv *env, jobject jprocess) {
259 msg_process_t process = jprocess_to_native(jprocess, env);
263 jxbt_throw_notbound(env, "process", jprocess);
268 MSG_process_restart(process);
275 JNIEXPORT jboolean JNICALL Java_org_simgrid_msg_Process_isSuspended(JNIEnv * env, jobject jprocess)
277 msg_process_t process = jprocess_to_native(jprocess, env);
280 jxbt_throw_notbound(env, "process", jprocess);
284 /* true is the process is suspended, false otherwise */
285 return (jboolean) MSG_process_is_suspended(process);
288 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_sleep(JNIEnv *env, jclass cls, jlong jmillis, jint jnanos)
290 double time = ((double)jmillis) / 1000 + ((double)jnanos) / 1000000000;
292 rv = MSG_process_sleep(time);
294 XBT_DEBUG("Something during the MSG_process_sleep invocation was wrong, trigger a HostFailureException");
296 //jmsg_throw_status(env,rv);
298 // adsein, the code above as been replaced by the code below. Indeed, according to the documentation, a sleep can only
299 // trigger a host_failure exception. When the sleep crashes due to a host shutdown, the exception thrown by smx_context_java.c
300 // 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
301 // function msg_error_t MSG_process_sleep(double nb_sec)
303 jxbt_throw_host_failure(env,nullptr);
307 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_waitFor(JNIEnv * env, jobject jprocess, jdouble jseconds)
310 rv = MSG_process_sleep((double)jseconds);
311 if (env->ExceptionOccurred())
314 XBT_DEBUG("Status NOK");
315 jmsg_throw_status(env,rv);
319 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_kill(JNIEnv * env, jobject jprocess)
321 /* get the native instances from the java ones */
322 msg_process_t process = jprocess_to_native(jprocess, env);
324 jxbt_throw_notbound(env, "process", jprocess);
329 MSG_process_kill(process);
330 } catch (xbt_ex& ex) {
331 XBT_VERB("This process just killed itself.");
335 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_migrate(JNIEnv * env, jobject jprocess, jobject jhost)
337 msg_process_t process = jprocess_to_native(jprocess, env);
340 jxbt_throw_notbound(env, "process", jprocess);
344 msg_host_t host = jhost_get_native(env, jhost);
347 jxbt_throw_notbound(env, "host", jhost);
351 /* try to change the host of the process */
352 msg_error_t rv = MSG_process_migrate(process, host);
354 jmsg_throw_status(env,rv);
357 /* change the host java side */
358 env->SetObjectField(jprocess, jprocess_field_Process_host, jhost);
361 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_yield(JNIEnv* env, jclass cls)
366 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_setKillTime (JNIEnv *env , jobject jprocess, jdouble jkilltime) {
367 msg_process_t process = jprocess_to_native(jprocess, env);
368 MSG_process_set_kill_time(process, (double)jkilltime);
371 JNIEXPORT jint JNICALL Java_org_simgrid_msg_Process_getCount(JNIEnv * env, jclass cls) {
372 return (jint) MSG_process_get_number();