1 /* Functions related to the java process instances. */
3 /* Copyright (c) 2007-2022. 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. */
8 #include "jmsg_process.h"
10 #include "JavaContext.hpp"
12 #include "jmsg_host.h"
13 #include "jxbt_utilities.hpp"
14 #include "simgrid/Exception.hpp"
15 #include "simgrid/s4u/Actor.hpp"
16 #include "src/kernel/actor/ActorImpl.hpp"
18 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(java);
20 jfieldID jprocess_field_Process_bind;
21 jfieldID jprocess_field_Process_host;
22 jfieldID jprocess_field_Process_killTime;
23 jfieldID jprocess_field_Process_name;
24 jfieldID jprocess_field_Process_pid;
25 jfieldID jprocess_field_Process_ppid;
27 jobject jprocess_from_native(const_sg_actor_t actor)
29 const simgrid::kernel::context::JavaContext* context =
30 static_cast<simgrid::kernel::context::JavaContext*>(actor->get_impl()->context_.get());
31 return context->jprocess_;
34 jobject jprocess_ref(jobject jprocess, JNIEnv* env)
36 return env->NewGlobalRef(jprocess);
39 void jprocess_unref(jobject jprocess, JNIEnv* env)
41 env->DeleteGlobalRef(jprocess);
44 sg_actor_t jprocess_to_native(jobject jprocess, JNIEnv* env)
46 return (sg_actor_t)(intptr_t)env->GetLongField(jprocess, jprocess_field_Process_bind);
49 void jprocess_bind(jobject jprocess, const_sg_actor_t actor, JNIEnv* env)
51 env->SetLongField(jprocess, jprocess_field_Process_bind, (intptr_t)actor);
54 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_nativeInit(JNIEnv *env, jclass cls) {
55 jclass jprocess_class_Process = env->FindClass("org/simgrid/msg/Process");
56 xbt_assert(jprocess_class_Process, "Native initialization of msg/Process failed. Please report that bug");
58 jprocess_field_Process_name = jxbt_get_jfield(env, jprocess_class_Process, "name", "Ljava/lang/String;");
59 jprocess_field_Process_bind = jxbt_get_jfield(env, jprocess_class_Process, "bind", "J");
60 jprocess_field_Process_pid = jxbt_get_jfield(env, jprocess_class_Process, "pid", "I");
61 jprocess_field_Process_ppid = jxbt_get_jfield(env, jprocess_class_Process, "ppid", "I");
62 jprocess_field_Process_host = jxbt_get_jfield(env, jprocess_class_Process, "host", "Lorg/simgrid/msg/Host;");
63 jprocess_field_Process_killTime = jxbt_get_jfield(env, jprocess_class_Process, "killTime", "D");
64 xbt_assert(jprocess_field_Process_name && jprocess_field_Process_pid && jprocess_field_Process_ppid &&
65 jprocess_field_Process_host,
66 "Native initialization of msg/Process failed. Please report that bug");
69 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_create(JNIEnv* env, jobject jprocess_arg, jobject jhost)
71 /* create a global java process instance */
72 jobject jprocess = jprocess_ref(jprocess_arg, env);
74 /* Actually build the MSG process */
75 auto jname = (jstring)env->GetObjectField(jprocess, jprocess_field_Process_name);
76 const char* name = env->GetStringUTFChars(jname, nullptr);
77 auto actor_code = [jprocess]() { simgrid::kernel::context::java_main_jprocess(jprocess); };
78 auto self = simgrid::kernel::actor::ActorImpl::self();
79 sg_host_t host = jhost_get_native(env, jhost);
80 auto* actor = simgrid::kernel::actor::simcall_answered([name, actor_code, host, self] {
81 return simgrid::kernel::actor::ActorImpl::create(std::move(name), std::move(actor_code), nullptr, host, self).get();
85 env->ReleaseStringUTFChars(jname, name);
87 /* Retrieve the kill time from the actor */
88 actor->get_ciface()->set_kill_time((double)env->GetDoubleField(jprocess, jprocess_field_Process_killTime));
90 /* sets the PID and the PPID of the actor */
91 env->SetIntField(jprocess, jprocess_field_Process_pid, (jint)actor->get_ciface()->get_pid());
92 env->SetIntField(jprocess, jprocess_field_Process_ppid, (jint)actor->get_ciface()->get_ppid());
95 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_daemonize(JNIEnv* env, jobject jprocess)
97 sg_actor_t actor = jprocess_to_native(jprocess, env);
100 jxbt_throw_notbound(env, "process", jprocess);
107 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_killAll(JNIEnv* env, jclass cls)
112 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Process_fromPID(JNIEnv * env, jclass cls, jint pid)
114 auto const* actor = sg_actor_by_pid(pid);
117 jxbt_throw_process_not_found(env, std::string("PID = ") + std::to_string(static_cast<int>(pid)));
121 jobject jprocess = jprocess_from_native(actor);
124 jxbt_throw_jni(env, "get process failed");
131 JNIEXPORT jint JNICALL Java_org_simgrid_msg_Process_nativeGetPID(JNIEnv* env, jobject jprocess)
133 const_sg_actor_t actor = jprocess_to_native(jprocess, env);
134 return sg_actor_get_pid(actor);
137 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Process_getProperty(JNIEnv *env, jobject jprocess, jobject jname) {
138 const_sg_actor_t actor = jprocess_to_native(jprocess, env);
141 jxbt_throw_notbound(env, "process", jprocess);
144 jstring_wrapper name(env, (jstring)jname);
146 const char* property = actor->get_property(name);
150 jobject jproperty = env->NewStringUTF(property);
155 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Process_getCurrentProcess(JNIEnv * env, jclass cls)
157 jobject jprocess = jprocess_from_native(sg_actor_self());
159 jxbt_throw_jni(env, xbt_strdup("SIMIX_process_get_jprocess() failed"));
164 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_suspend(JNIEnv * env, jobject jprocess)
166 sg_actor_t actor = jprocess_to_native(jprocess, env);
169 jxbt_throw_notbound(env, "process", jprocess);
173 /* suspend the process */
177 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_resume(JNIEnv * env, jobject jprocess)
179 sg_actor_t actor = jprocess_to_native(jprocess, env);
182 jxbt_throw_notbound(env, "process", jprocess);
186 /* resume the process */
190 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_setAutoRestart(JNIEnv* env, jobject jprocess,
191 jboolean jauto_restart)
193 sg_actor_t actor = jprocess_to_native(jprocess, env);
195 jxbt_throw_notbound(env, "process", jprocess);
199 actor->set_auto_restart(jauto_restart == JNI_TRUE);
202 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_restart (JNIEnv *env, jobject jprocess) {
203 sg_actor_t actor = jprocess_to_native(jprocess, env);
206 jxbt_throw_notbound(env, "process", jprocess);
213 JNIEXPORT jboolean JNICALL Java_org_simgrid_msg_Process_isSuspended(JNIEnv * env, jobject jprocess)
215 sg_actor_t actor = jprocess_to_native(jprocess, env);
218 jxbt_throw_notbound(env, "process", jprocess);
222 /* true is the actor is suspended, false otherwise */
223 return (jboolean)actor->is_suspended();
226 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_sleep(JNIEnv *env, jclass cls, jlong jmillis, jint jnanos)
228 double time = ((double)jmillis) / 1000 + ((double)jnanos) / 1000000000;
229 msg_error_t rv = MSG_OK;
230 if (not simgrid::ForcefulKillException::try_n_catch([&time]() { simgrid::s4u::this_actor::sleep_for(time); })) {
231 rv = MSG_HOST_FAILURE;
234 jmsg_throw_status(env, rv);
238 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_waitFor(JNIEnv * env, jobject jprocess, jdouble jseconds)
240 msg_error_t rv = MSG_OK;
241 if (not simgrid::ForcefulKillException::try_n_catch(
242 [&jseconds]() { simgrid::s4u::this_actor::sleep_for((double)jseconds); })) {
243 rv = MSG_HOST_FAILURE;
244 jxbt_throw_by_name(env, "org/simgrid/msg/ProcessKilledError", "Process killed");
246 if (env->ExceptionOccurred())
249 XBT_DEBUG("Status NOK");
250 jmsg_throw_status(env,rv);
254 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_kill(JNIEnv * env, jobject jprocess)
256 /* get the native instances from the java ones */
257 sg_actor_t actor = jprocess_to_native(jprocess, env);
259 jxbt_throw_notbound(env, "process", jprocess);
262 if (not simgrid::ForcefulKillException::try_n_catch([&actor]() { actor->kill(); })) {
263 jxbt_throw_by_name(env, "org/simgrid/msg/ProcessKilledError", "Process killed");
267 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_migrate(JNIEnv * env, jobject jprocess, jobject jhost)
269 sg_actor_t actor = jprocess_to_native(jprocess, env);
272 jxbt_throw_notbound(env, "process", jprocess);
276 sg_host_t host = jhost_get_native(env, jhost);
279 jxbt_throw_notbound(env, "host", jhost);
283 /* change the host of the actor */
284 actor->set_host(host);
286 /* change the host java side */
287 env->SetObjectField(jprocess, jprocess_field_Process_host, jhost);
290 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_yield(JNIEnv* env, jclass cls)
292 simgrid::s4u::this_actor::yield();
295 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_setKillTime (JNIEnv *env , jobject jprocess, jdouble jkilltime) {
296 jprocess_to_native(jprocess, env)->set_kill_time((double)jkilltime);
299 JNIEXPORT jint JNICALL Java_org_simgrid_msg_Process_getCount(JNIEnv * env, jclass cls) {
300 return (jint)sg_actor_count();