1 /* Functions related to the java process instances. */
3 /* Copyright (c) 2007-2020. 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"
16 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(java);
18 jfieldID jprocess_field_Process_bind;
19 jfieldID jprocess_field_Process_host;
20 jfieldID jprocess_field_Process_killTime;
21 jfieldID jprocess_field_Process_name;
22 jfieldID jprocess_field_Process_pid;
23 jfieldID jprocess_field_Process_ppid;
25 jobject jprocess_from_native(const_sg_actor_t process)
27 const simgrid::kernel::context::JavaContext* context =
28 static_cast<simgrid::kernel::context::JavaContext*>(process->get_impl()->context_.get());
29 return context->jprocess_;
32 jobject jprocess_ref(jobject jprocess, JNIEnv* env)
34 return env->NewGlobalRef(jprocess);
37 void jprocess_unref(jobject jprocess, JNIEnv* env)
39 env->DeleteGlobalRef(jprocess);
42 msg_process_t jprocess_to_native(jobject jprocess, JNIEnv* env)
44 return (msg_process_t)(intptr_t)env->GetLongField(jprocess, jprocess_field_Process_bind);
47 void jprocess_bind(jobject jprocess, const_sg_actor_t process, JNIEnv* env)
49 env->SetLongField(jprocess, jprocess_field_Process_bind, (intptr_t)process);
52 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_nativeInit(JNIEnv *env, jclass cls) {
53 jclass jprocess_class_Process = env->FindClass("org/simgrid/msg/Process");
54 xbt_assert(jprocess_class_Process, "Native initialization of msg/Process failed. Please report that bug");
56 jprocess_field_Process_name = jxbt_get_jfield(env, jprocess_class_Process, "name", "Ljava/lang/String;");
57 jprocess_field_Process_bind = jxbt_get_jfield(env, jprocess_class_Process, "bind", "J");
58 jprocess_field_Process_pid = jxbt_get_jfield(env, jprocess_class_Process, "pid", "I");
59 jprocess_field_Process_ppid = jxbt_get_jfield(env, jprocess_class_Process, "ppid", "I");
60 jprocess_field_Process_host = jxbt_get_jfield(env, jprocess_class_Process, "host", "Lorg/simgrid/msg/Host;");
61 jprocess_field_Process_killTime = jxbt_get_jfield(env, jprocess_class_Process, "killTime", "D");
62 xbt_assert(jprocess_field_Process_name && jprocess_field_Process_pid && jprocess_field_Process_ppid &&
63 jprocess_field_Process_host,
64 "Native initialization of msg/Process failed. Please report that bug");
67 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_create(JNIEnv* env, jobject jprocess_arg, jobject jhost)
69 /* create a global java process instance */
70 jobject jprocess = jprocess_ref(jprocess_arg, env);
72 /* Actually build the MSG process */
73 jstring jname = (jstring)env->GetObjectField(jprocess, jprocess_field_Process_name);
74 const char* name = env->GetStringUTFChars(jname, 0);
75 auto actor_code = [jprocess]() { simgrid::kernel::context::java_main_jprocess(jprocess); };
76 smx_actor_t self = SIMIX_process_self();
77 sg_host_t host = jhost_get_native(env, jhost);
78 smx_actor_t actor = simgrid::kernel::actor::simcall([name, actor_code, host, self] {
79 return simgrid::kernel::actor::ActorImpl::create(std::move(name), std::move(actor_code), nullptr, host, nullptr,
85 env->ReleaseStringUTFChars(jname, name);
87 /* Retrieve the kill time from the process */
88 actor->ciface()->set_kill_time((double)env->GetDoubleField(jprocess, jprocess_field_Process_killTime));
90 /* sets the PID and the PPID of the process */
91 env->SetIntField(jprocess, jprocess_field_Process_pid, (jint)actor->ciface()->get_pid());
92 env->SetIntField(jprocess, jprocess_field_Process_ppid, (jint)actor->ciface()->get_ppid());
95 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_daemonize(JNIEnv* env, jobject jprocess)
97 msg_process_t process = jprocess_to_native(jprocess, env);
100 jxbt_throw_notbound(env, "process", jprocess);
104 process->daemonize();
107 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_killAll(JNIEnv* env, jclass cls)
109 MSG_process_killall();
112 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Process_fromPID(JNIEnv * env, jclass cls, jint pid)
114 auto const* process = MSG_process_from_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(process);
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 process = jprocess_to_native(jprocess, env);
134 return MSG_process_get_PID(process);
137 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Process_getProperty(JNIEnv *env, jobject jprocess, jobject jname) {
138 const_sg_actor_t process = jprocess_to_native(jprocess, env);
141 jxbt_throw_notbound(env, "process", jprocess);
144 const char *name = env->GetStringUTFChars((jstring)jname, 0);
146 const char *property = MSG_process_get_property_value(process, name);
150 jobject jproperty = env->NewStringUTF(property);
152 env->ReleaseStringUTFChars((jstring)jname, name);
157 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Process_getCurrentProcess(JNIEnv * env, jclass cls)
159 jobject jprocess = jprocess_from_native(MSG_process_self());
161 jxbt_throw_jni(env, xbt_strdup("SIMIX_process_get_jprocess() failed"));
166 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_suspend(JNIEnv * env, jobject jprocess)
168 msg_process_t process = jprocess_to_native(jprocess, env);
171 jxbt_throw_notbound(env, "process", jprocess);
175 /* suspend the process */
179 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_resume(JNIEnv * env, jobject jprocess)
181 msg_process_t process = jprocess_to_native(jprocess, env);
184 jxbt_throw_notbound(env, "process", jprocess);
188 /* resume the process */
192 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_setAutoRestart(JNIEnv* env, jobject jprocess,
193 jboolean jauto_restart)
195 msg_process_t process = jprocess_to_native(jprocess, env);
197 jxbt_throw_notbound(env, "process", jprocess);
201 process->set_auto_restart(jauto_restart == JNI_TRUE);
204 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_restart (JNIEnv *env, jobject jprocess) {
205 msg_process_t process = jprocess_to_native(jprocess, env);
208 jxbt_throw_notbound(env, "process", jprocess);
215 JNIEXPORT jboolean JNICALL Java_org_simgrid_msg_Process_isSuspended(JNIEnv * env, jobject jprocess)
217 msg_process_t process = jprocess_to_native(jprocess, env);
220 jxbt_throw_notbound(env, "process", jprocess);
224 /* true is the process is suspended, false otherwise */
225 return (jboolean)process->is_suspended();
228 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_sleep(JNIEnv *env, jclass cls, jlong jmillis, jint jnanos)
230 double time = ((double)jmillis) / 1000 + ((double)jnanos) / 1000000000;
231 msg_error_t rv = MSG_OK;
232 if (not simgrid::ForcefulKillException::try_n_catch([&time]() { simgrid::s4u::this_actor::sleep_for(time); })) {
233 rv = MSG_HOST_FAILURE;
236 jmsg_throw_status(env, rv);
240 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_waitFor(JNIEnv * env, jobject jprocess, jdouble jseconds)
242 msg_error_t rv = MSG_OK;
243 if (not simgrid::ForcefulKillException::try_n_catch(
244 [&jseconds]() { simgrid::s4u::this_actor::sleep_for((double)jseconds); })) {
245 rv = MSG_HOST_FAILURE;
246 jxbt_throw_by_name(env, "org/simgrid/msg/ProcessKilledError", "Process killed");
248 if (env->ExceptionOccurred())
251 XBT_DEBUG("Status NOK");
252 jmsg_throw_status(env,rv);
256 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_kill(JNIEnv * env, jobject jprocess)
258 /* get the native instances from the java ones */
259 msg_process_t process = jprocess_to_native(jprocess, env);
261 jxbt_throw_notbound(env, "process", jprocess);
264 if (not simgrid::ForcefulKillException::try_n_catch([&process]() { MSG_process_kill(process); })) {
265 jxbt_throw_by_name(env, "org/simgrid/msg/ProcessKilledError", "Process killed");
269 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_migrate(JNIEnv * env, jobject jprocess, jobject jhost)
271 msg_process_t process = jprocess_to_native(jprocess, env);
274 jxbt_throw_notbound(env, "process", jprocess);
278 msg_host_t host = jhost_get_native(env, jhost);
281 jxbt_throw_notbound(env, "host", jhost);
285 /* change the host of the process */
286 process->set_host(host);
288 /* change the host java side */
289 env->SetObjectField(jprocess, jprocess_field_Process_host, jhost);
292 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_yield(JNIEnv* env, jclass cls)
297 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_setKillTime (JNIEnv *env , jobject jprocess, jdouble jkilltime) {
298 msg_process_t process = jprocess_to_native(jprocess, env);
299 MSG_process_set_kill_time(process, (double)jkilltime);
302 JNIEXPORT jint JNICALL Java_org_simgrid_msg_Process_getCount(JNIEnv * env, jclass cls) {
303 return (jint) MSG_process_get_number();