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_host_t host; /* Where that process lives */
82 /* get the name of the java process */
83 jname = jprocess_get_name(jprocess_arg, env);
85 jxbt_throw_null(env, xbt_strdup("Process name cannot be nullptr"));
88 const char* name = env->GetStringUTFChars(jname, 0);
90 /* bind/retrieve the msg host */
91 const char* hostname = env->GetStringUTFChars((jstring)jhostname, 0);
92 host = MSG_host_by_name(hostname);
93 if (!(host)) { /* not bound */
94 jxbt_throw_host_not_found(env, hostname);
97 env->ReleaseStringUTFChars((jstring)jhostname, hostname);
99 /* create a global java process instance */
100 jprocess = jprocess_ref(jprocess_arg, env);
102 jxbt_throw_jni(env, "Can't get a global ref to the java process");
106 /* Actually build the MSG process */
107 msg_process_t process = MSG_process_create_from_stdfunc(name,
109 // This is the jprocess passed as process data.
110 // It would be simpler if we could use a closure.
112 (jobject)MSG_process_get_data(MSG_process_self());
113 simgrid::kernel::context::java_main_jprocess(jprocess);
116 jprocess, host, /* properties*/ nullptr);
118 env->ReleaseStringUTFChars(jname, name);
119 /* bind the java process instance to the native process */
120 jprocess_bind(jprocess, process, env);
122 /* Retrieve the kill time from the process */
123 jdouble jkill = env->GetDoubleField(jprocess, jprocess_field_Process_killTime);
124 MSG_process_set_kill_time(process, (double)jkill);
126 /* sets the PID and the PPID of the process */
127 env->SetIntField(jprocess, jprocess_field_Process_pid,(jint) MSG_process_get_PID(process));
128 env->SetIntField(jprocess, jprocess_field_Process_ppid, (jint) MSG_process_get_PPID(process));
129 /* sets the Host of the process */
130 jobject jhost = Java_org_simgrid_msg_Host_getByName(env,nullptr, (jstring)jhostname);
132 env->SetObjectField(jprocess, jprocess_field_Process_host, jhost);
135 JNIEXPORT jint JNICALL Java_org_simgrid_msg_Process_killAll(JNIEnv * env, jclass cls, jint jresetPID)
137 return (jint) MSG_process_killall((int) jresetPID);
140 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Process_fromPID(JNIEnv * env, jclass cls, jint pid)
142 msg_process_t process = MSG_process_from_PID(pid);
145 jxbt_throw_process_not_found(env, bprintf("PID = %d",static_cast<int>(pid)));
149 jobject jprocess = jprocess_from_native(process);
152 jxbt_throw_jni(env, "get process failed");
159 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Process_getProperty(JNIEnv *env, jobject jprocess, jobject jname) {
160 msg_process_t process = jprocess_to_native(jprocess, env);
163 jxbt_throw_notbound(env, "process", jprocess);
166 const char *name = env->GetStringUTFChars((jstring)jname, 0);
168 const char *property = MSG_process_get_property_value(process, name);
173 jobject jproperty = env->NewStringUTF(property);
175 env->ReleaseStringUTFChars((jstring)jname, name);
180 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Process_getCurrentProcess(JNIEnv * env, jclass cls)
182 msg_process_t process = MSG_process_self();
186 jxbt_throw_jni(env, xbt_strdup("MSG_process_self() failed"));
190 jprocess = jprocess_from_native(process);
193 jxbt_throw_jni(env, xbt_strdup("SIMIX_process_get_jprocess() failed"));
198 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_suspend(JNIEnv * env, jobject jprocess)
200 msg_process_t process = jprocess_to_native(jprocess, env);
203 jxbt_throw_notbound(env, "process", jprocess);
207 /* try to suspend the process */
208 msg_error_t rv = MSG_process_suspend(process);
210 jxbt_check_res("MSG_process_suspend()", rv, MSG_OK, bprintf("unexpected error , please report this bug"));
213 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_resume(JNIEnv * env, jobject jprocess)
215 msg_process_t process = jprocess_to_native(jprocess, env);
218 jxbt_throw_notbound(env, "process", jprocess);
222 /* try to resume the process */
223 msg_error_t rv = MSG_process_resume(process);
225 jxbt_check_res("MSG_process_resume()", rv, MSG_OK, bprintf("unexpected error , please report this bug"));
228 JNICALL Java_org_simgrid_msg_Process_setAutoRestart (JNIEnv *env, jobject jprocess, jboolean jauto_restart) {
229 msg_process_t process = jprocess_to_native(jprocess, env);
232 int auto_restart = jauto_restart == JNI_TRUE ? 1 : 0;
235 jxbt_throw_notbound(env, "process", jprocess);
240 MSG_process_auto_restart_set(process,auto_restart);
247 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_restart (JNIEnv *env, jobject jprocess) {
248 msg_process_t process = jprocess_to_native(jprocess, env);
252 jxbt_throw_notbound(env, "process", jprocess);
257 MSG_process_restart(process);
264 JNIEXPORT jboolean JNICALL Java_org_simgrid_msg_Process_isSuspended(JNIEnv * env, jobject jprocess)
266 msg_process_t process = jprocess_to_native(jprocess, env);
269 jxbt_throw_notbound(env, "process", jprocess);
273 /* true is the process is suspended, false otherwise */
274 return (jboolean) MSG_process_is_suspended(process);
277 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_sleep(JNIEnv *env, jclass cls, jlong jmillis, jint jnanos)
279 double time = ((double)jmillis) / 1000 + ((double)jnanos) / 1000000000;
281 rv = MSG_process_sleep(time);
283 XBT_DEBUG("Something during the MSG_process_sleep invocation was wrong, trigger a HostFailureException");
285 //jmsg_throw_status(env,rv);
287 // adsein, the code above as been replaced by the code below. Indeed, according to the documentation, a sleep can only
288 // trigger a host_failure exception. When the sleep crashes due to a host shutdown, the exception thrown by smx_context_java.c
289 // 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
290 // function msg_error_t MSG_process_sleep(double nb_sec)
292 jxbt_throw_host_failure(env, "");
296 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_waitFor(JNIEnv * env, jobject jprocess, jdouble jseconds)
299 rv = MSG_process_sleep((double)jseconds);
300 if (env->ExceptionOccurred())
303 XBT_DEBUG("Status NOK");
304 jmsg_throw_status(env,rv);
308 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_kill(JNIEnv * env, jobject jprocess)
310 /* get the native instances from the java ones */
311 msg_process_t process = jprocess_to_native(jprocess, env);
313 jxbt_throw_notbound(env, "process", jprocess);
318 MSG_process_kill(process);
319 } catch (xbt_ex& ex) {
320 XBT_VERB("This process just killed itself.");
324 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_migrate(JNIEnv * env, jobject jprocess, jobject jhost)
326 msg_process_t process = jprocess_to_native(jprocess, env);
329 jxbt_throw_notbound(env, "process", jprocess);
333 msg_host_t host = jhost_get_native(env, jhost);
336 jxbt_throw_notbound(env, "host", jhost);
340 /* try to change the host of the process */
341 msg_error_t rv = MSG_process_migrate(process, host);
343 jmsg_throw_status(env,rv);
346 /* change the host java side */
347 env->SetObjectField(jprocess, jprocess_field_Process_host, jhost);
350 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_yield(JNIEnv* env, jclass cls)
355 JNIEXPORT void JNICALL Java_org_simgrid_msg_Process_setKillTime (JNIEnv *env , jobject jprocess, jdouble jkilltime) {
356 msg_process_t process = jprocess_to_native(jprocess, env);
357 MSG_process_set_kill_time(process, (double)jkilltime);
360 JNIEXPORT jint JNICALL Java_org_simgrid_msg_Process_getCount(JNIEnv * env, jclass cls) {
361 return (jint) MSG_process_get_number();