1 /* Copyright (c) 2007-2021. The SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
12 #include "simgrid/Exception.hpp"
13 #include "simgrid/plugins/energy.h"
14 #include "simgrid/plugins/file_system.h"
15 #include "simgrid/plugins/live_migration.h"
16 #include "simgrid/plugins/load.h"
17 #include "simgrid/simix.h"
19 #include "simgrid/s4u/Actor.hpp"
20 #include "simgrid/s4u/Host.hpp"
23 #include "jmsg_as.hpp"
24 #include "jmsg_host.h"
25 #include "jmsg_process.h"
26 #include "jmsg_task.h"
27 #include "jxbt_utilities.hpp"
29 #include "JavaContext.hpp"
31 /* Shut up some errors in eclipse online compiler. I wish such a pimple wouldn't be needed */
38 /* end of eclipse-mandated pimple */
40 int JAVA_HOST_LEVEL = -1;
42 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(java);
44 JavaVM *__java_vm = nullptr;
46 JNIEnv *get_current_thread_env()
48 using simgrid::kernel::context::JavaContext;
49 const JavaContext* ctx = static_cast<JavaContext*>(simgrid::kernel::context::Context::self());
56 void jmsg_throw_status(JNIEnv *env, msg_error_t status) {
59 jxbt_throw_time_out_failure(env, "");
61 case MSG_TRANSFER_FAILURE:
62 jxbt_throw_transfer_failure(env, "");
64 case MSG_HOST_FAILURE:
65 jxbt_throw_host_failure(env, "");
67 case MSG_TASK_CANCELED:
68 jxbt_throw_task_cancelled(env, "");
71 xbt_die("undefined message failed (please see jmsg_throw_status function in jmsg.cpp)");
75 /***************************************************************************************
76 * Unsortable functions *
77 ***************************************************************************************/
79 JNIEXPORT jdouble JNICALL Java_org_simgrid_msg_Msg_getClock(JNIEnv*, jclass)
81 return (jdouble)simgrid_get_clock();
84 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_init(JNIEnv* env, jclass, jobjectArray jargs)
86 env->GetJavaVM(&__java_vm);
88 simgrid::kernel::context::factory_initializer = &simgrid::kernel::context::java_factory;
89 const _jthrowable* exc = env->ExceptionOccurred();
91 env->ExceptionClear();
94 setlocale(LC_NUMERIC,"C");
98 argc += static_cast<int>(env->GetArrayLength(jargs));
101 // Need a static storage because the XBT layer saves the arguments in xbt::binary_name and xbt::cmdline.
102 static std::vector<std::string> args;
105 args.emplace_back("java");
106 for (int index = 1; index < argc; index++) {
107 auto jval = (jstring)env->GetObjectArrayElement(jargs, index - 1);
108 const char* tmp = env->GetStringUTFChars(jval, nullptr);
109 args.emplace_back(tmp);
110 env->ReleaseStringUTFChars(jval, tmp);
113 std::unique_ptr<char* []> argv(new char*[argc + 1]);
114 std::transform(begin(args), end(args), argv.get(), [](std::string& s) { return &s.front(); });
115 argv[argc] = nullptr;
118 MSG_init(&argc2, argv.get());
119 xbt_assert(argc2 <= argc);
121 for (int index = 1; index < argc2; index++)
122 env->SetObjectArrayElement(jargs, index - 1, (jstring)env->NewStringUTF(argv[index]));
124 sg_vm_live_migration_plugin_init();
125 JAVA_HOST_LEVEL = simgrid::s4u::Host::extension_create(nullptr);
128 JNIEXPORT void JNICALL JNICALL Java_org_simgrid_msg_Msg_run(JNIEnv* env, jclass)
131 XBT_DEBUG("Ready to run");
133 XBT_DEBUG("Done running");
134 XBT_INFO("Terminating the simulation...");
135 /* Cleanup java hosts */
136 sg_host_t* hosts = sg_host_list();
137 size_t host_count = sg_host_count();
138 for (size_t index = 0; index < host_count - 1; index++) {
139 auto jhost = (jobject)hosts[index]->extension(JAVA_HOST_LEVEL);
141 jhost_unref(env, jhost);
145 /* Display the status of remaining threads. None should survive, but who knows */
146 jclass clsProcess = jxbt_get_class(env, "org/simgrid/msg/Process");
147 jmethodID idDebug = jxbt_get_static_jmethod(env, clsProcess, "debugAllThreads", "()V");
148 xbt_assert(idDebug != nullptr, "Method Process.debugAllThreads() not found...");
149 env->CallStaticVoidMethod(clsProcess, idDebug);
152 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_createEnvironment(JNIEnv* env, jclass, jstring jplatformFile)
154 const char* platformFile = env->GetStringUTFChars(jplatformFile, nullptr);
156 simgrid_load_platform(platformFile);
158 env->ReleaseStringUTFChars(jplatformFile, platformFile);
161 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Msg_environmentGetRoutingRoot(JNIEnv* env, jclass)
163 sg_netzone_t as = sg_zone_get_root();
164 jobject jas = jnetzone_new_instance(env);
166 jxbt_throw_jni(env, "java As instantiation failed");
169 jas = jnetzone_ref(env, jas);
171 jxbt_throw_jni(env, "new global ref allocation failed");
174 jnetzone_bind(jas, as, env);
176 return (jobject) jas;
179 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_debug(JNIEnv* env, jclass, jstring js)
181 const char* s = env->GetStringUTFChars(js, nullptr);
183 env->ReleaseStringUTFChars(js, s);
186 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_verb(JNIEnv* env, jclass, jstring js)
188 const char* s = env->GetStringUTFChars(js, nullptr);
190 env->ReleaseStringUTFChars(js, s);
193 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_info(JNIEnv* env, jclass, jstring js)
195 const char* s = env->GetStringUTFChars(js, nullptr);
197 env->ReleaseStringUTFChars(js, s);
200 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_warn(JNIEnv* env, jclass, jstring js)
202 const char* s = env->GetStringUTFChars(js, nullptr);
204 env->ReleaseStringUTFChars(js, s);
207 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_error(JNIEnv* env, jclass, jstring js)
209 const char* s = env->GetStringUTFChars(js, nullptr);
211 env->ReleaseStringUTFChars(js, s);
214 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_critical(JNIEnv* env, jclass, jstring js)
216 const char* s = env->GetStringUTFChars(js, nullptr);
217 XBT_CRITICAL("%s", s);
218 env->ReleaseStringUTFChars(js, s);
221 static void java_main(int argc, char* argv[]);
223 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_deployApplication(JNIEnv* env, jclass, jstring jdeploymentFile)
225 const char* deploymentFile = env->GetStringUTFChars(jdeploymentFile, nullptr);
227 simgrid_register_default(java_main);
228 simgrid_load_deployment(deploymentFile);
231 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_energyInit() {
232 sg_host_energy_plugin_init();
235 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_loadInit() {
236 sg_host_load_plugin_init();
238 /** Run a Java org.simgrid.msg.Process
240 * If needed, this waits for the process starting time.
241 * Then it calls the Process.run() method.
243 static void run_jprocess(JNIEnv *env, jobject jprocess)
245 // wait for the process's start time
246 jfieldID jprocess_field_Process_startTime = jxbt_get_sfield(env, "org/simgrid/msg/Process", "startTime", "D");
247 jdouble startTime = env->GetDoubleField(jprocess, jprocess_field_Process_startTime);
248 if (startTime > simgrid_get_clock())
249 simgrid::s4u::this_actor::sleep_for(startTime - simgrid_get_clock());
251 //Execution of the "run" method.
252 jmethodID id = jxbt_get_smethod(env, "org/simgrid/msg/Process", "run", "()V");
253 xbt_assert((id != nullptr), "Method Process.run() not found...");
255 env->CallVoidMethod(jprocess, id);
256 if (env->ExceptionOccurred()) {
257 XBT_DEBUG("Something went wrong in this Java actor, forget about it.");
258 env->ExceptionClear();
259 xbt_assert(__java_vm->DetachCurrentThread() == JNI_OK, "Cannot detach failing thread");
260 simgrid::ForcefulKillException::do_throw();
264 /** Create a Java org.simgrid.msg.Process with the arguments and run it */
265 static void java_main(int argc, char* argv[])
267 JNIEnv *env = get_current_thread_env();
268 auto* context = static_cast<simgrid::kernel::context::JavaContext*>(simgrid::kernel::context::Context::self());
270 //Change the "." in class name for "/".
271 std::string arg0 = argv[0];
272 std::replace(begin(arg0), end(arg0), '.', '/');
273 jclass class_Process = env->FindClass(arg0.c_str());
274 //Retrieve the methodID for the constructor
275 xbt_assert((class_Process != nullptr), "Class not found (%s). The deployment file must use the fully qualified class name, including the package. The case is important.", argv[0]);
276 jmethodID constructor_Process = env->GetMethodID(class_Process, "<init>", "(Lorg/simgrid/msg/Host;Ljava/lang/String;[Ljava/lang/String;)V");
277 xbt_assert((constructor_Process != nullptr), "Constructor not found for class %s. Is there a (Host, String ,String[]) constructor in your class ?", argv[0]);
279 //Retrieve the name of the process.
280 jstring jname = env->NewStringUTF(argv[0]);
281 //Build the arguments
282 auto args = static_cast<jobjectArray>(
283 env->NewObjectArray(argc - 1, env->FindClass("java/lang/String"), env->NewStringUTF("")));
284 for (int i = 1; i < argc; i++)
285 env->SetObjectArrayElement(args,i - 1, env->NewStringUTF(argv[i]));
286 //Retrieve the host for the process.
287 jstring jhostName = env->NewStringUTF(simgrid::s4u::Host::current()->get_cname());
288 jobject jhost = Java_org_simgrid_msg_Host_getByName(env, nullptr, jhostName);
289 //creates the process
290 jobject jprocess = env->NewObject(class_Process, constructor_Process, jhost, jname, args);
291 xbt_assert((jprocess != nullptr), "Process allocation failed.");
292 jprocess = env->NewGlobalRef(jprocess);
293 //bind the process to the context
294 const_sg_actor_t actor = sg_actor_self();
296 context->jprocess_ = jprocess;
297 /* sets the PID and the PPID of the process */
298 env->SetIntField(jprocess, jprocess_field_Process_pid, static_cast<jint>(actor->get_pid()));
299 env->SetIntField(jprocess, jprocess_field_Process_ppid, static_cast<jint>(actor->get_ppid()));
300 jprocess_bind(jprocess, actor, env);
302 run_jprocess(env, context->jprocess_);
309 /** Run the Java org.simgrid.msg.Process */
310 void java_main_jprocess(jobject jprocess)
312 JNIEnv *env = get_current_thread_env();
313 auto* context = static_cast<JavaContext*>(Context::self());
314 context->jprocess_ = jprocess;
315 jprocess_bind(context->jprocess_, sg_actor_self(), env);
317 run_jprocess(env, context->jprocess_);
319 } // namespace context
320 } // namespace kernel
321 } // namespace simgrid