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(java);
21 jfieldID jprocess_field_Process_bind;
22 jfieldID jprocess_field_Process_host;
23 jfieldID jprocess_field_Process_killTime;
24 jfieldID jprocess_field_Process_name;
25 jfieldID jprocess_field_Process_pid;
26 jfieldID jprocess_field_Process_ppid;
28 jobject jprocess_from_native(msg_process_t process)
30 simgrid::kernel::context::JavaContext* context = (simgrid::kernel::context::JavaContext*) MSG_process_get_smx_ctx(process);
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 msg_process_t jprocess_to_native(jobject jprocess, JNIEnv* env)
46 return (msg_process_t)(intptr_t)env->GetLongField(jprocess, jprocess_field_Process_bind);
49 void jprocess_bind(jobject jprocess, msg_process_t process, JNIEnv * env)
51 env->SetLongField(jprocess, jprocess_field_Process_bind, (intptr_t)process);
54 jstring jprocess_get_name(jobject jprocess, JNIEnv * env)
56 jstring jname = (jstring) env->GetObjectField(jprocess, jprocess_field_Process_name);
57 return (jstring) env->NewGlobalRef(jname);
60 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_nativeInit(JNIEnv *env, jclass cls) {
61 jclass jprocess_class_Process = env->FindClass("org/simgrid/msg/Process");
62 xbt_assert(jprocess_class_Process, "Native initialization of msg/Process failed. Please report that bug");
64 jprocess_field_Process_name = jxbt_get_jfield(env, jprocess_class_Process, "name", "Ljava/lang/String;");
65 jprocess_field_Process_bind = jxbt_get_jfield(env, jprocess_class_Process, "bind", "J");
66 jprocess_field_Process_pid = jxbt_get_jfield(env, jprocess_class_Process, "pid", "I");
67 jprocess_field_Process_ppid = jxbt_get_jfield(env, jprocess_class_Process, "ppid", "I");
68 jprocess_field_Process_host = jxbt_get_jfield(env, jprocess_class_Process, "host", "Lorg/simgrid/msg/Host;");
69 jprocess_field_Process_killTime = jxbt_get_jfield(env, jprocess_class_Process, "killTime", "D");
70 xbt_assert(jprocess_field_Process_name && jprocess_field_Process_pid && jprocess_field_Process_ppid &&
71 jprocess_field_Process_host,
72 "Native initialization of msg/Process failed. Please report that bug");
75 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_create(JNIEnv * env, jobject jprocess_arg, jobject jhostname)
77 jobject jprocess; /* the global reference to the java process instance */
78 jstring jname; /* the name of the java process instance */
79 msg_process_t process; /* the native process to create */
80 msg_host_t host; /* Where that process lives */
83 /* get the name of the java process */
84 jname = jprocess_get_name(jprocess_arg, env);
86 jxbt_throw_null(env, xbt_strdup("Process name cannot be nullptr"));
89 const char* name = env->GetStringUTFChars(jname, 0);
91 /* bind/retrieve the msg host */
92 const char* hostname = env->GetStringUTFChars((jstring)jhostname, 0);
93 host = MSG_host_by_name(hostname);
94 if (!(host)) { /* not bound */
95 jxbt_throw_host_not_found(env, hostname);
98 env->ReleaseStringUTFChars((jstring)jhostname, hostname);
100 /* create a global java process instance */
101 jprocess = jprocess_ref(jprocess_arg, env);
103 jxbt_throw_jni(env, "Can't get a global ref to the java process");
107 /* Actually build the MSG process */
108 process = MSG_process_create_with_environment(name, [](int argc, char** argv) -> int {
109 msg_process_t process = MSG_process_self();
110 // This is the jprocess passed as process data.
111 // It would be simpler if we could use a closure.
112 jobject jprocess = (jobject) MSG_process_get_data(process);
113 simgrid::kernel::context::java_main_jprocess(jprocess);
117 /*argc, argv, properties*/
118 0, nullptr, nullptr);
119 env->ReleaseStringUTFChars(jname, name);
120 /* bind the java process instance to the native process */
121 jprocess_bind(jprocess, process, env);
123 /* Retrieve the kill time from the process */
124 jdouble jkill = env->GetDoubleField(jprocess, jprocess_field_Process_killTime);
125 MSG_process_set_kill_time(process, (double)jkill);
127 /* sets the PID and the PPID of the process */
128 env->SetIntField(jprocess, jprocess_field_Process_pid,(jint) MSG_process_get_PID(process));
129 env->SetIntField(jprocess, jprocess_field_Process_ppid, (jint) MSG_process_get_PPID(process));
130 /* sets the Host of the process */
131 jobject jhost = Java_org_simgrid_msg_Host_getByName(env,nullptr, (jstring)jhostname);
133 env->SetObjectField(jprocess, jprocess_field_Process_host, jhost);
136 JNIEXPORT jint JNICALL Java_org_simgrid_msg_Process_killAll(JNIEnv * env, jclass cls, jint jresetPID)
138 return (jint) MSG_process_killall((int) jresetPID);
141 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Process_fromPID(JNIEnv * env, jclass cls, jint pid)
143 msg_process_t process = MSG_process_from_PID(pid);
146 jxbt_throw_process_not_found(env, bprintf("PID = %d",static_cast<int>(pid)));
150 jobject jprocess = jprocess_from_native(process);
153 jxbt_throw_jni(env, "get process failed");
160 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Process_getProperty(JNIEnv *env, jobject jprocess, jobject jname) {
161 msg_process_t process = jprocess_to_native(jprocess, env);
164 jxbt_throw_notbound(env, "process", jprocess);
167 const char *name = env->GetStringUTFChars((jstring)jname, 0);
169 const char *property = MSG_process_get_property_value(process, name);
174 jobject jproperty = env->NewStringUTF(property);
176 env->ReleaseStringUTFChars((jstring)jname, name);
181 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Process_getCurrentProcess(JNIEnv * env, jclass cls)
183 msg_process_t process = MSG_process_self();
187 jxbt_throw_jni(env, xbt_strdup("MSG_process_self() failed"));
191 jprocess = jprocess_from_native(process);
194 jxbt_throw_jni(env, xbt_strdup("SIMIX_process_get_jprocess() failed"));
199 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_suspend(JNIEnv * env, jobject jprocess)
201 msg_process_t process = jprocess_to_native(jprocess, env);
204 jxbt_throw_notbound(env, "process", jprocess);
208 /* try to suspend the process */
209 msg_error_t rv = MSG_process_suspend(process);
211 jxbt_check_res("MSG_process_suspend()", rv, MSG_OK, bprintf("unexpected error , please report this bug"));
214 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_resume(JNIEnv * env, jobject jprocess)
216 msg_process_t process = jprocess_to_native(jprocess, env);
219 jxbt_throw_notbound(env, "process", jprocess);
223 /* try to resume the process */
224 msg_error_t rv = MSG_process_resume(process);
226 jxbt_check_res("MSG_process_resume()", rv, MSG_OK, bprintf("unexpected error , please report this bug"));
229 JNICALL Java_org_simgrid_msg_Process_setAutoRestart (JNIEnv *env, jobject jprocess, jboolean jauto_restart) {
230 msg_process_t process = jprocess_to_native(jprocess, env);
233 int auto_restart = jauto_restart == JNI_TRUE ? 1 : 0;
236 jxbt_throw_notbound(env, "process", jprocess);
241 MSG_process_auto_restart_set(process,auto_restart);
248 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_restart (JNIEnv *env, jobject jprocess) {
249 msg_process_t process = jprocess_to_native(jprocess, env);
253 jxbt_throw_notbound(env, "process", jprocess);
258 MSG_process_restart(process);
265 JNIEXPORT jboolean JNICALL Java_org_simgrid_msg_Process_isSuspended(JNIEnv * env, jobject jprocess)
267 msg_process_t process = jprocess_to_native(jprocess, env);
270 jxbt_throw_notbound(env, "process", jprocess);
274 /* true is the process is suspended, false otherwise */
275 return (jboolean) MSG_process_is_suspended(process);
278 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_sleep(JNIEnv *env, jclass cls, jlong jmillis, jint jnanos)
280 double time = ((double)jmillis) / 1000 + ((double)jnanos) / 1000000000;
282 rv = MSG_process_sleep(time);
284 XBT_DEBUG("Something during the MSG_process_sleep invocation was wrong, trigger a HostFailureException");
286 //jmsg_throw_status(env,rv);
288 // adsein, the code above as been replaced by the code below. Indeed, according to the documentation, a sleep can only
289 // trigger a host_failure exception. When the sleep crashes due to a host shutdown, the exception thrown by smx_context_java.c
290 // 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
291 // function msg_error_t MSG_process_sleep(double nb_sec)
293 jxbt_throw_host_failure(env, "");
297 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_waitFor(JNIEnv * env, jobject jprocess, jdouble jseconds)
300 rv = MSG_process_sleep((double)jseconds);
301 if (env->ExceptionOccurred())
304 XBT_DEBUG("Status NOK");
305 jmsg_throw_status(env,rv);
309 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_kill(JNIEnv * env, jobject jprocess)
311 /* get the native instances from the java ones */
312 msg_process_t process = jprocess_to_native(jprocess, env);
314 jxbt_throw_notbound(env, "process", jprocess);
319 MSG_process_kill(process);
320 } catch (xbt_ex& ex) {
321 XBT_VERB("This process just killed itself.");
325 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_migrate(JNIEnv * env, jobject jprocess, jobject jhost)
327 msg_process_t process = jprocess_to_native(jprocess, env);
330 jxbt_throw_notbound(env, "process", jprocess);
334 msg_host_t host = jhost_get_native(env, jhost);
337 jxbt_throw_notbound(env, "host", jhost);
341 /* try to change the host of the process */
342 msg_error_t rv = MSG_process_migrate(process, host);
344 jmsg_throw_status(env,rv);
347 /* change the host java side */
348 env->SetObjectField(jprocess, jprocess_field_Process_host, jhost);
351 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_yield(JNIEnv* env, jclass cls)
356 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_setKillTime (JNIEnv *env , jobject jprocess, jdouble jkilltime) {
357 msg_process_t process = jprocess_to_native(jprocess, env);
358 MSG_process_set_kill_time(process, (double)jkilltime);
361 JNIEXPORT jint JNICALL Java_org_simgrid_msg_Process_getCount(JNIEnv * env, jclass cls) {
362 return (jint) MSG_process_get_number();