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"
18 #include "simgrid/s4u/Actor.hpp"
19 #include "simgrid/s4u/Host.hpp"
22 #include "jmsg_as.hpp"
23 #include "jmsg_host.h"
24 #include "jmsg_process.h"
25 #include "jmsg_task.h"
26 #include "jxbt_utilities.hpp"
28 #include "JavaContext.hpp"
30 /* Shut up some errors in eclipse online compiler. I wish such a pimple wouldn't be needed */
37 /* end of eclipse-mandated pimple */
39 int JAVA_HOST_LEVEL = -1;
41 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(java);
43 JavaVM *__java_vm = nullptr;
45 JNIEnv *get_current_thread_env()
47 using simgrid::kernel::context::JavaContext;
48 const JavaContext* ctx = static_cast<JavaContext*>(simgrid::kernel::context::Context::self());
55 void jmsg_throw_status(JNIEnv *env, msg_error_t status) {
58 jxbt_throw_time_out_failure(env, "");
60 case MSG_TRANSFER_FAILURE:
61 jxbt_throw_transfer_failure(env, "");
63 case MSG_HOST_FAILURE:
64 jxbt_throw_host_failure(env, "");
66 case MSG_TASK_CANCELED:
67 jxbt_throw_task_cancelled(env, "");
70 xbt_die("undefined message failed (please see jmsg_throw_status function in jmsg.cpp)");
74 /***************************************************************************************
75 * Unsortable functions *
76 ***************************************************************************************/
78 JNIEXPORT jdouble JNICALL Java_org_simgrid_msg_Msg_getClock(JNIEnv*, jclass)
80 return (jdouble)simgrid_get_clock();
83 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_init(JNIEnv* env, jclass, jobjectArray jargs)
85 env->GetJavaVM(&__java_vm);
87 simgrid::kernel::context::factory_initializer = &simgrid::kernel::context::java_factory;
88 const _jthrowable* exc = env->ExceptionOccurred();
90 env->ExceptionClear();
93 setlocale(LC_NUMERIC,"C");
97 argc += static_cast<int>(env->GetArrayLength(jargs));
100 // Need a static storage because the XBT layer saves the arguments in xbt::binary_name and xbt::cmdline.
101 static std::vector<std::string> args;
104 args.emplace_back("java");
105 for (int index = 1; index < argc; index++) {
106 auto jval = (jstring)env->GetObjectArrayElement(jargs, index - 1);
107 const char* tmp = env->GetStringUTFChars(jval, nullptr);
108 args.emplace_back(tmp);
109 env->ReleaseStringUTFChars(jval, tmp);
112 std::unique_ptr<char* []> argv(new char*[argc + 1]);
113 std::transform(begin(args), end(args), argv.get(), [](std::string& s) { return &s.front(); });
114 argv[argc] = nullptr;
117 MSG_init(&argc2, argv.get());
118 xbt_assert(argc2 <= argc);
120 for (int index = 1; index < argc2; index++)
121 env->SetObjectArrayElement(jargs, index - 1, (jstring)env->NewStringUTF(argv[index]));
123 sg_vm_live_migration_plugin_init();
124 JAVA_HOST_LEVEL = simgrid::s4u::Host::extension_create(nullptr);
127 JNIEXPORT void JNICALL JNICALL Java_org_simgrid_msg_Msg_run(JNIEnv* env, jclass)
130 XBT_DEBUG("Ready to run");
132 XBT_DEBUG("Done running");
133 XBT_INFO("Terminating the simulation...");
134 /* Cleanup java hosts */
135 sg_host_t* hosts = sg_host_list();
136 size_t host_count = sg_host_count();
137 for (size_t index = 0; index < host_count - 1; index++) {
138 auto jhost = (jobject)hosts[index]->extension(JAVA_HOST_LEVEL);
140 jhost_unref(env, jhost);
144 /* Display the status of remaining threads. None should survive, but who knows */
145 jclass clsProcess = jxbt_get_class(env, "org/simgrid/msg/Process");
146 jmethodID idDebug = jxbt_get_static_jmethod(env, clsProcess, "debugAllThreads", "()V");
147 xbt_assert(idDebug != nullptr, "Method Process.debugAllThreads() not found...");
148 env->CallStaticVoidMethod(clsProcess, idDebug);
151 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_createEnvironment(JNIEnv* env, jclass, jstring jplatformFile)
153 const char* platformFile = env->GetStringUTFChars(jplatformFile, nullptr);
155 simgrid_load_platform(platformFile);
157 env->ReleaseStringUTFChars(jplatformFile, platformFile);
160 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Msg_environmentGetRoutingRoot(JNIEnv* env, jclass)
162 sg_netzone_t as = sg_zone_get_root();
163 jobject jas = jnetzone_new_instance(env);
165 jxbt_throw_jni(env, "java As instantiation failed");
168 jas = jnetzone_ref(env, jas);
170 jxbt_throw_jni(env, "new global ref allocation failed");
173 jnetzone_bind(jas, as, env);
175 return (jobject) jas;
178 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_debug(JNIEnv* env, jclass, jstring js)
180 const char* s = env->GetStringUTFChars(js, nullptr);
182 env->ReleaseStringUTFChars(js, s);
185 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_verb(JNIEnv* env, jclass, jstring js)
187 const char* s = env->GetStringUTFChars(js, nullptr);
189 env->ReleaseStringUTFChars(js, s);
192 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_info(JNIEnv* env, jclass, jstring js)
194 const char* s = env->GetStringUTFChars(js, nullptr);
196 env->ReleaseStringUTFChars(js, s);
199 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_warn(JNIEnv* env, jclass, jstring js)
201 const char* s = env->GetStringUTFChars(js, nullptr);
203 env->ReleaseStringUTFChars(js, s);
206 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_error(JNIEnv* env, jclass, jstring js)
208 const char* s = env->GetStringUTFChars(js, nullptr);
210 env->ReleaseStringUTFChars(js, s);
213 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_critical(JNIEnv* env, jclass, jstring js)
215 const char* s = env->GetStringUTFChars(js, nullptr);
216 XBT_CRITICAL("%s", s);
217 env->ReleaseStringUTFChars(js, s);
220 static void java_main(int argc, char* argv[]);
222 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_deployApplication(JNIEnv* env, jclass, jstring jdeploymentFile)
224 const char* deploymentFile = env->GetStringUTFChars(jdeploymentFile, nullptr);
226 simgrid_register_default(java_main);
227 simgrid_load_deployment(deploymentFile);
230 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_energyInit() {
231 sg_host_energy_plugin_init();
234 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_loadInit() {
235 sg_host_load_plugin_init();
237 /** Run a Java org.simgrid.msg.Process
239 * If needed, this waits for the process starting time.
240 * Then it calls the Process.run() method.
242 static void run_jprocess(JNIEnv *env, jobject jprocess)
244 // wait for the process's start time
245 jfieldID jprocess_field_Process_startTime = jxbt_get_sfield(env, "org/simgrid/msg/Process", "startTime", "D");
246 jdouble startTime = env->GetDoubleField(jprocess, jprocess_field_Process_startTime);
247 if (startTime > simgrid_get_clock())
248 simgrid::s4u::this_actor::sleep_for(startTime - simgrid_get_clock());
250 //Execution of the "run" method.
251 jmethodID id = jxbt_get_smethod(env, "org/simgrid/msg/Process", "run", "()V");
252 xbt_assert((id != nullptr), "Method Process.run() not found...");
254 env->CallVoidMethod(jprocess, id);
255 if (env->ExceptionOccurred()) {
256 XBT_DEBUG("Something went wrong in this Java actor, forget about it.");
257 env->ExceptionClear();
258 xbt_assert(__java_vm->DetachCurrentThread() == JNI_OK, "Cannot detach failing thread");
259 simgrid::ForcefulKillException::do_throw();
263 /** Create a Java org.simgrid.msg.Process with the arguments and run it */
264 static void java_main(int argc, char* argv[])
266 JNIEnv *env = get_current_thread_env();
267 auto* context = static_cast<simgrid::kernel::context::JavaContext*>(simgrid::kernel::context::Context::self());
269 //Change the "." in class name for "/".
270 std::string arg0 = argv[0];
271 std::replace(begin(arg0), end(arg0), '.', '/');
272 jclass class_Process = env->FindClass(arg0.c_str());
273 //Retrieve the methodID for the constructor
274 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]);
275 jmethodID constructor_Process = env->GetMethodID(class_Process, "<init>", "(Lorg/simgrid/msg/Host;Ljava/lang/String;[Ljava/lang/String;)V");
276 xbt_assert((constructor_Process != nullptr), "Constructor not found for class %s. Is there a (Host, String ,String[]) constructor in your class ?", argv[0]);
278 //Retrieve the name of the process.
279 jstring jname = env->NewStringUTF(argv[0]);
280 //Build the arguments
281 auto args = static_cast<jobjectArray>(
282 env->NewObjectArray(argc - 1, env->FindClass("java/lang/String"), env->NewStringUTF("")));
283 for (int i = 1; i < argc; i++)
284 env->SetObjectArrayElement(args,i - 1, env->NewStringUTF(argv[i]));
285 //Retrieve the host for the process.
286 jstring jhostName = env->NewStringUTF(simgrid::s4u::Host::current()->get_cname());
287 jobject jhost = Java_org_simgrid_msg_Host_getByName(env, nullptr, jhostName);
288 //creates the process
289 jobject jprocess = env->NewObject(class_Process, constructor_Process, jhost, jname, args);
290 xbt_assert((jprocess != nullptr), "Process allocation failed.");
291 jprocess = env->NewGlobalRef(jprocess);
292 //bind the process to the context
293 const_sg_actor_t actor = sg_actor_self();
295 context->jprocess_ = jprocess;
296 /* sets the PID and the PPID of the process */
297 env->SetIntField(jprocess, jprocess_field_Process_pid, static_cast<jint>(actor->get_pid()));
298 env->SetIntField(jprocess, jprocess_field_Process_ppid, static_cast<jint>(actor->get_ppid()));
299 jprocess_bind(jprocess, actor, env);
301 run_jprocess(env, context->jprocess_);
308 /** Run the Java org.simgrid.msg.Process */
309 void java_main_jprocess(jobject jprocess)
311 JNIEnv *env = get_current_thread_env();
312 auto* context = static_cast<JavaContext*>(Context::self());
313 context->jprocess_ = jprocess;
314 jprocess_bind(context->jprocess_, sg_actor_self(), env);
316 run_jprocess(env, context->jprocess_);
318 } // namespace context
319 } // namespace kernel
320 } // namespace simgrid