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/Host.hpp"
21 #include "src/simix/smx_private.hpp"
24 #include "jmsg_as.hpp"
25 #include "jmsg_host.h"
26 #include "jmsg_process.h"
27 #include "jmsg_task.h"
28 #include "jxbt_utilities.hpp"
30 #include "JavaContext.hpp"
32 /* Shut up some errors in eclipse online compiler. I wish such a pimple wouldn't be needed */
39 /* end of eclipse-mandated pimple */
41 int JAVA_HOST_LEVEL = -1;
43 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(java);
45 JavaVM *__java_vm = nullptr;
47 JNIEnv *get_current_thread_env()
49 using simgrid::kernel::context::JavaContext;
50 const JavaContext* ctx = static_cast<JavaContext*>(simgrid::kernel::context::Context::self());
57 void jmsg_throw_status(JNIEnv *env, msg_error_t status) {
60 jxbt_throw_time_out_failure(env, "");
62 case MSG_TRANSFER_FAILURE:
63 jxbt_throw_transfer_failure(env, "");
65 case MSG_HOST_FAILURE:
66 jxbt_throw_host_failure(env, "");
68 case MSG_TASK_CANCELED:
69 jxbt_throw_task_cancelled(env, "");
72 xbt_die("undefined message failed (please see jmsg_throw_status function in jmsg.cpp)");
76 /***************************************************************************************
77 * Unsortable functions *
78 ***************************************************************************************/
80 JNIEXPORT jdouble JNICALL Java_org_simgrid_msg_Msg_getClock(JNIEnv*, jclass)
82 return (jdouble)simgrid_get_clock();
85 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_init(JNIEnv* env, jclass, jobjectArray jargs)
87 env->GetJavaVM(&__java_vm);
89 simgrid::kernel::context::factory_initializer = &simgrid::kernel::context::java_factory;
90 const _jthrowable* exc = env->ExceptionOccurred();
92 env->ExceptionClear();
95 setlocale(LC_NUMERIC,"C");
99 argc += static_cast<int>(env->GetArrayLength(jargs));
100 xbt_assert(argc > 0);
102 // Need a static storage because the XBT layer saves the arguments in xbt::binary_name and xbt::cmdline.
103 static std::vector<std::string> args;
106 args.emplace_back("java");
107 for (int index = 1; index < argc; index++) {
108 auto jval = (jstring)env->GetObjectArrayElement(jargs, index - 1);
109 const char* tmp = env->GetStringUTFChars(jval, nullptr);
110 args.emplace_back(tmp);
111 env->ReleaseStringUTFChars(jval, tmp);
114 std::unique_ptr<char* []> argv(new char*[argc + 1]);
115 std::transform(begin(args), end(args), argv.get(), [](std::string& s) { return &s.front(); });
116 argv[argc] = nullptr;
119 MSG_init(&argc2, argv.get());
120 xbt_assert(argc2 <= argc);
122 for (int index = 1; index < argc2; index++)
123 env->SetObjectArrayElement(jargs, index - 1, (jstring)env->NewStringUTF(argv[index]));
125 sg_vm_live_migration_plugin_init();
126 JAVA_HOST_LEVEL = simgrid::s4u::Host::extension_create(nullptr);
129 JNIEXPORT void JNICALL JNICALL Java_org_simgrid_msg_Msg_run(JNIEnv* env, jclass)
132 XBT_DEBUG("Ready to run");
134 XBT_DEBUG("Done running");
135 XBT_INFO("Terminating the simulation...");
136 /* Cleanup java hosts */
137 sg_host_t* hosts = sg_host_list();
138 size_t host_count = sg_host_count();
139 for (size_t index = 0; index < host_count - 1; index++) {
140 auto jhost = (jobject)hosts[index]->extension(JAVA_HOST_LEVEL);
142 jhost_unref(env, jhost);
146 /* Display the status of remaining threads. None should survive, but who knows */
147 jclass clsProcess = jxbt_get_class(env, "org/simgrid/msg/Process");
148 jmethodID idDebug = jxbt_get_static_jmethod(env, clsProcess, "debugAllThreads", "()V");
149 xbt_assert(idDebug != nullptr, "Method Process.debugAllThreads() not found...");
150 env->CallStaticVoidMethod(clsProcess, idDebug);
153 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_createEnvironment(JNIEnv* env, jclass, jstring jplatformFile)
155 const char* platformFile = env->GetStringUTFChars(jplatformFile, nullptr);
157 simgrid_load_platform(platformFile);
159 env->ReleaseStringUTFChars(jplatformFile, platformFile);
162 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Msg_environmentGetRoutingRoot(JNIEnv* env, jclass)
164 sg_netzone_t as = sg_zone_get_root();
165 jobject jas = jnetzone_new_instance(env);
167 jxbt_throw_jni(env, "java As instantiation failed");
170 jas = jnetzone_ref(env, jas);
172 jxbt_throw_jni(env, "new global ref allocation failed");
175 jnetzone_bind(jas, as, env);
177 return (jobject) jas;
180 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_debug(JNIEnv* env, jclass, jstring js)
182 const char* s = env->GetStringUTFChars(js, nullptr);
184 env->ReleaseStringUTFChars(js, s);
187 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_verb(JNIEnv* env, jclass, jstring js)
189 const char* s = env->GetStringUTFChars(js, nullptr);
191 env->ReleaseStringUTFChars(js, s);
194 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_info(JNIEnv* env, jclass, jstring js)
196 const char* s = env->GetStringUTFChars(js, nullptr);
198 env->ReleaseStringUTFChars(js, s);
201 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_warn(JNIEnv* env, jclass, jstring js)
203 const char* s = env->GetStringUTFChars(js, nullptr);
205 env->ReleaseStringUTFChars(js, s);
208 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_error(JNIEnv* env, jclass, jstring js)
210 const char* s = env->GetStringUTFChars(js, nullptr);
212 env->ReleaseStringUTFChars(js, s);
215 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_critical(JNIEnv* env, jclass, jstring js)
217 const char* s = env->GetStringUTFChars(js, nullptr);
218 XBT_CRITICAL("%s", s);
219 env->ReleaseStringUTFChars(js, s);
222 static void java_main(int argc, char* argv[]);
224 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_deployApplication(JNIEnv* env, jclass, jstring jdeploymentFile)
226 const char* deploymentFile = env->GetStringUTFChars(jdeploymentFile, nullptr);
228 simgrid_register_default(java_main);
229 simgrid_load_deployment(deploymentFile);
232 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_energyInit() {
233 sg_host_energy_plugin_init();
236 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_loadInit() {
237 sg_host_load_plugin_init();
239 /** Run a Java org.simgrid.msg.Process
241 * If needed, this waits for the process starting time.
242 * Then it calls the Process.run() method.
244 static void run_jprocess(JNIEnv *env, jobject jprocess)
246 // wait for the process's start time
247 jfieldID jprocess_field_Process_startTime = jxbt_get_sfield(env, "org/simgrid/msg/Process", "startTime", "D");
248 jdouble startTime = env->GetDoubleField(jprocess, jprocess_field_Process_startTime);
249 if (startTime > simgrid_get_clock())
250 simgrid::s4u::this_actor::sleep_for(startTime - simgrid_get_clock());
252 //Execution of the "run" method.
253 jmethodID id = jxbt_get_smethod(env, "org/simgrid/msg/Process", "run", "()V");
254 xbt_assert((id != nullptr), "Method Process.run() not found...");
256 env->CallVoidMethod(jprocess, id);
257 if (env->ExceptionOccurred()) {
258 XBT_DEBUG("Something went wrong in this Java actor, forget about it.");
259 env->ExceptionClear();
260 xbt_assert(__java_vm->DetachCurrentThread() == JNI_OK, "Cannot detach failing thread");
261 simgrid::ForcefulKillException::do_throw();
265 /** Create a Java org.simgrid.msg.Process with the arguments and run it */
266 static void java_main(int argc, char* argv[])
268 JNIEnv *env = get_current_thread_env();
269 auto* context = static_cast<simgrid::kernel::context::JavaContext*>(simgrid::kernel::context::Context::self());
271 //Change the "." in class name for "/".
272 std::string arg0 = argv[0];
273 std::replace(begin(arg0), end(arg0), '.', '/');
274 jclass class_Process = env->FindClass(arg0.c_str());
275 //Retrieve the methodID for the constructor
276 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]);
277 jmethodID constructor_Process = env->GetMethodID(class_Process, "<init>", "(Lorg/simgrid/msg/Host;Ljava/lang/String;[Ljava/lang/String;)V");
278 xbt_assert((constructor_Process != nullptr), "Constructor not found for class %s. Is there a (Host, String ,String[]) constructor in your class ?", argv[0]);
280 //Retrieve the name of the process.
281 jstring jname = env->NewStringUTF(argv[0]);
282 //Build the arguments
283 auto args = static_cast<jobjectArray>(
284 env->NewObjectArray(argc - 1, env->FindClass("java/lang/String"), env->NewStringUTF("")));
285 for (int i = 1; i < argc; i++)
286 env->SetObjectArrayElement(args,i - 1, env->NewStringUTF(argv[i]));
287 //Retrieve the host for the process.
288 jstring jhostName = env->NewStringUTF(simgrid::s4u::Host::current()->get_cname());
289 jobject jhost = Java_org_simgrid_msg_Host_getByName(env, nullptr, jhostName);
290 //creates the process
291 jobject jprocess = env->NewObject(class_Process, constructor_Process, jhost, jname, args);
292 xbt_assert((jprocess != nullptr), "Process allocation failed.");
293 jprocess = env->NewGlobalRef(jprocess);
294 //bind the process to the context
295 const_sg_actor_t actor = sg_actor_self();
297 context->jprocess_ = jprocess;
298 /* sets the PID and the PPID of the process */
299 env->SetIntField(jprocess, jprocess_field_Process_pid, static_cast<jint>(actor->get_pid()));
300 env->SetIntField(jprocess, jprocess_field_Process_ppid, static_cast<jint>(actor->get_ppid()));
301 jprocess_bind(jprocess, actor, env);
303 run_jprocess(env, context->jprocess_);
310 /** Run the Java org.simgrid.msg.Process */
311 void java_main_jprocess(jobject jprocess)
313 JNIEnv *env = get_current_thread_env();
314 auto* context = static_cast<JavaContext*>(Context::self());
315 context->jprocess_ = jprocess;
316 jprocess_bind(context->jprocess_, sg_actor_self(), env);
318 run_jprocess(env, context->jprocess_);
320 } // namespace context
321 } // namespace kernel
322 } // namespace simgrid