1 /* Copyright (c) 2007-2022. 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::ContextFactory::initializer = []() {
88 XBT_INFO("Using regular java threads.");
89 return new simgrid::kernel::context::JavaContextFactory();
91 const _jthrowable* exc = env->ExceptionOccurred();
93 env->ExceptionClear();
96 setlocale(LC_NUMERIC,"C");
100 argc += static_cast<int>(env->GetArrayLength(jargs));
101 xbt_assert(argc > 0);
103 // Need a static storage because the XBT layer saves the arguments in xbt::binary_name and xbt::cmdline.
104 static std::vector<std::string> args;
107 args.emplace_back("java");
108 for (int index = 1; index < argc; index++) {
109 auto jval = (jstring)env->GetObjectArrayElement(jargs, index - 1);
110 jstring_wrapper tmp(env, jval);
111 args.emplace_back(tmp.value);
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 jstring_wrapper platformFile(env, jplatformFile);
156 simgrid_load_platform(platformFile);
159 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_Msg_environmentGetRoutingRoot(JNIEnv* env, jclass)
161 sg_netzone_t as = sg_zone_get_root();
162 jobject jas = jnetzone_new_instance(env);
164 jxbt_throw_jni(env, "java As instantiation failed");
167 jas = jnetzone_ref(env, jas);
169 jxbt_throw_jni(env, "new global ref allocation failed");
172 jnetzone_bind(jas, as, env);
174 return (jobject) jas;
177 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_debug(JNIEnv* env, jclass, jstring js)
179 jstring_wrapper s(env, js);
180 XBT_DEBUG("%s", s.value);
183 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_verb(JNIEnv* env, jclass, jstring js)
185 jstring_wrapper s(env, js);
186 XBT_VERB("%s", s.value);
189 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_info(JNIEnv* env, jclass, jstring js)
191 jstring_wrapper s(env, js);
192 XBT_INFO("%s", s.value);
195 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_warn(JNIEnv* env, jclass, jstring js)
197 jstring_wrapper s(env, js);
198 XBT_WARN("%s", s.value);
201 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_error(JNIEnv* env, jclass, jstring js)
203 jstring_wrapper s(env, js);
204 XBT_ERROR("%s", s.value);
207 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_critical(JNIEnv* env, jclass, jstring js)
209 jstring_wrapper s(env, js);
210 XBT_CRITICAL("%s", s.value);
213 static void java_main(int argc, char* argv[]);
215 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_deployApplication(JNIEnv* env, jclass, jstring jdeploymentFile)
217 jstring_wrapper deploymentFile(env, jdeploymentFile);
219 simgrid_register_default(java_main);
220 simgrid_load_deployment(deploymentFile);
223 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_energyInit() {
224 sg_host_energy_plugin_init();
227 JNIEXPORT void JNICALL Java_org_simgrid_msg_Msg_loadInit() {
228 sg_host_load_plugin_init();
230 /** Run a Java org.simgrid.msg.Process
232 * If needed, this waits for the process starting time.
233 * Then it calls the Process.run() method.
235 static void run_jprocess(JNIEnv *env, jobject jprocess)
237 // wait for the process's start time
238 jfieldID jprocess_field_Process_startTime = jxbt_get_sfield(env, "org/simgrid/msg/Process", "startTime", "D");
239 jdouble startTime = env->GetDoubleField(jprocess, jprocess_field_Process_startTime);
240 if (startTime > simgrid_get_clock())
241 simgrid::s4u::this_actor::sleep_for(startTime - simgrid_get_clock());
243 //Execution of the "run" method.
244 jmethodID id = jxbt_get_smethod(env, "org/simgrid/msg/Process", "run", "()V");
245 xbt_assert((id != nullptr), "Method Process.run() not found...");
247 env->CallVoidMethod(jprocess, id);
248 if (env->ExceptionOccurred()) {
249 XBT_DEBUG("Something went wrong in this Java actor, forget about it.");
250 env->ExceptionClear();
251 xbt_assert(__java_vm->DetachCurrentThread() == JNI_OK, "Cannot detach failing thread");
252 simgrid::ForcefulKillException::do_throw();
256 /** Create a Java org.simgrid.msg.Process with the arguments and run it */
257 static void java_main(int argc, char* argv[])
259 JNIEnv *env = get_current_thread_env();
260 auto* context = static_cast<simgrid::kernel::context::JavaContext*>(simgrid::kernel::context::Context::self());
262 //Change the "." in class name for "/".
263 std::string arg0 = argv[0];
264 std::replace(begin(arg0), end(arg0), '.', '/');
265 jclass class_Process = env->FindClass(arg0.c_str());
266 //Retrieve the methodID for the constructor
267 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]);
268 jmethodID constructor_Process = env->GetMethodID(class_Process, "<init>", "(Lorg/simgrid/msg/Host;Ljava/lang/String;[Ljava/lang/String;)V");
269 xbt_assert((constructor_Process != nullptr), "Constructor not found for class %s. Is there a (Host, String ,String[]) constructor in your class ?", argv[0]);
271 //Retrieve the name of the process.
272 jstring jname = env->NewStringUTF(argv[0]);
273 //Build the arguments
274 auto args = static_cast<jobjectArray>(
275 env->NewObjectArray(argc - 1, env->FindClass("java/lang/String"), env->NewStringUTF("")));
276 for (int i = 1; i < argc; i++)
277 env->SetObjectArrayElement(args,i - 1, env->NewStringUTF(argv[i]));
278 //Retrieve the host for the process.
279 jstring jhostName = env->NewStringUTF(simgrid::s4u::Host::current()->get_cname());
280 jobject jhost = Java_org_simgrid_msg_Host_getByName(env, nullptr, jhostName);
281 //creates the process
282 jobject jprocess = env->NewObject(class_Process, constructor_Process, jhost, jname, args);
283 xbt_assert((jprocess != nullptr), "Process allocation failed.");
284 jprocess = env->NewGlobalRef(jprocess);
285 //bind the process to the context
286 const_sg_actor_t actor = sg_actor_self();
288 context->jprocess_ = jprocess;
289 /* sets the PID and the PPID of the process */
290 env->SetIntField(jprocess, jprocess_field_Process_pid, static_cast<jint>(actor->get_pid()));
291 env->SetIntField(jprocess, jprocess_field_Process_ppid, static_cast<jint>(actor->get_ppid()));
292 jprocess_bind(jprocess, actor, env);
294 run_jprocess(env, context->jprocess_);
297 namespace simgrid::kernel::context {
299 /** Run the Java org.simgrid.msg.Process */
300 void java_main_jprocess(jobject jprocess)
302 JNIEnv *env = get_current_thread_env();
303 auto* context = static_cast<JavaContext*>(Context::self());
304 context->jprocess_ = jprocess;
305 jprocess_bind(context->jprocess_, sg_actor_self(), env);
307 run_jprocess(env, context->jprocess_);
309 } // namespace simgrid::kernel::context