1 /* Functions related to the Virtual Machines. */
3 /* Copyright (c) 2012-2018. 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 "jxbt_utilities.hpp"
11 #include "simgrid/plugins/live_migration.h"
12 #include "src/plugins/vm/VirtualMachineImpl.hpp"
15 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(java);
19 extern int JAVA_HOST_LEVEL;
20 static jfieldID jvm_field_bind;
22 void jvm_bind(JNIEnv *env, jobject jvm, msg_vm_t vm)
24 env->SetLongField(jvm, jvm_field_bind, (intptr_t)vm);
27 msg_vm_t jvm_get_native(JNIEnv *env, jobject jvm)
29 return (msg_vm_t)(intptr_t)env->GetLongField(jvm, jvm_field_bind);
32 JNIEXPORT void JNICALL Java_org_simgrid_msg_VM_nativeInit(JNIEnv *env, jclass cls)
34 jclass jprocess_class_VM = env->FindClass("org/simgrid/msg/VM");
35 jvm_field_bind = jxbt_get_jfield(env, jprocess_class_VM, "bind", "J");
36 xbt_assert(jvm_field_bind, "Native initialization of msg/VM failed. Please report that bug");
39 JNIEXPORT jint JNICALL Java_org_simgrid_msg_VM_isCreated(JNIEnv * env, jobject jvm)
41 msg_vm_t vm = jvm_get_native(env,jvm);
42 return MSG_vm_is_created(vm);
45 JNIEXPORT jint JNICALL Java_org_simgrid_msg_VM_isRunning(JNIEnv * env, jobject jvm)
47 msg_vm_t vm = jvm_get_native(env,jvm);
48 return (jint) MSG_vm_is_running(vm);
51 JNIEXPORT jint JNICALL Java_org_simgrid_msg_VM_isMigrating(JNIEnv * env, jobject jvm)
53 msg_vm_t vm = jvm_get_native(env,jvm);
54 return (jint) MSG_vm_is_migrating(vm);
57 JNIEXPORT jint JNICALL Java_org_simgrid_msg_VM_isSuspended(JNIEnv * env, jobject jvm)
59 msg_vm_t vm = jvm_get_native(env,jvm);
60 return (jint) MSG_vm_is_suspended(vm);
63 JNIEXPORT void JNICALL Java_org_simgrid_msg_VM_setBound(JNIEnv *env, jobject jvm, jdouble bound)
65 msg_vm_t vm = jvm_get_native(env,jvm);
66 MSG_vm_set_bound(vm, bound);
69 JNIEXPORT void JNICALL Java_org_simgrid_msg_VM_create(JNIEnv* env, jobject jVm, jobject jHost, jstring jname,
70 jint coreAmount, jint jramsize, jint jmig_netspeed,
73 msg_host_t host = jhost_get_native(env, jHost);
75 const char* name = env->GetStringUTFChars(jname, 0);
76 msg_vm_t vm = MSG_vm_create_migratable(host, name, static_cast<int>(coreAmount), static_cast<int>(jramsize),
77 static_cast<int>(jmig_netspeed), static_cast<int>(jdp_intensity));
78 env->ReleaseStringUTFChars(jname, name);
80 jvm_bind(env, jVm, vm);
81 jVm = env->NewGlobalRef(jVm);
82 // We use the extension level of the host, even if that's somehow disturbing
83 vm->extension_set(JAVA_HOST_LEVEL, (void*)jVm);
86 JNIEXPORT jobjectArray JNICALL Java_org_simgrid_msg_VM_all(JNIEnv* env, jclass cls_arg)
88 xbt_dynar_t hosts = MSG_hosts_as_dynar();
89 std::vector<jobject> vms;
93 xbt_dynar_foreach (hosts, it, h) {
94 simgrid::s4u::VirtualMachine* vm = dynamic_cast<simgrid::s4u::VirtualMachine*>(h);
95 if (vm != nullptr && vm->getState() != SURF_VM_STATE_DESTROYED) {
96 jobject jvm = static_cast<jobject>(vm->extension(JAVA_HOST_LEVEL));
100 xbt_dynar_free(&hosts);
103 int count = vms.size();
105 jclass cls = jxbt_get_class(env, "org/simgrid/msg/VM");
109 jobjectArray jtable = env->NewObjectArray((jsize)count, cls, nullptr);
111 jxbt_throw_jni(env, "Hosts table allocation failed");
115 for (int index = 0; index < count; index++) {
116 jobject jhost = vms.at(index);
117 env->SetObjectArrayElement(jtable, index, jhost);
122 JNIEXPORT void JNICALL Java_org_simgrid_msg_VM_nativeFinalize(JNIEnv *env, jobject jvm)
124 msg_vm_t vm = jvm_get_native(env,jvm);
128 JNIEXPORT void JNICALL Java_org_simgrid_msg_VM_start(JNIEnv *env, jobject jvm)
130 msg_vm_t vm = jvm_get_native(env,jvm);
134 JNIEXPORT void JNICALL Java_org_simgrid_msg_VM_shutdown(JNIEnv *env, jobject jvm)
136 msg_vm_t vm = jvm_get_native(env,jvm);
141 JNIEXPORT void JNICALL Java_org_simgrid_msg_VM_destroy(JNIEnv* env, jobject jvm)
143 msg_vm_t vm = jvm_get_native(env, jvm);
146 auto* vmList = &simgrid::vm::VirtualMachineImpl::allVms_;
147 vmList->erase(std::remove(vmList->begin(), vmList->end(), vm), vmList->end());
151 JNIEXPORT void JNICALL Java_org_simgrid_msg_VM_nativeMigration(JNIEnv* env, jobject jvm, jobject jhost)
153 msg_vm_t vm = jvm_get_native(env,jvm);
154 msg_host_t host = jhost_get_native(env, jhost);
156 MSG_vm_migrate(vm,host);
159 XBT_VERB("CATCH EXCEPTION MIGRATION %s",e.what());
160 jxbt_throw_host_failure(env, (char*)"during migration");
164 JNIEXPORT void JNICALL Java_org_simgrid_msg_VM_suspend(JNIEnv *env, jobject jvm)
166 msg_vm_t vm = jvm_get_native(env,jvm);
170 JNIEXPORT void JNICALL Java_org_simgrid_msg_VM_resume(JNIEnv *env, jobject jvm)
172 msg_vm_t vm = jvm_get_native(env,jvm);
176 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_VM_getVMByName(JNIEnv* env, jclass cls, jstring jname)
179 /* get the C string from the java string */
180 if (jname == nullptr) {
181 jxbt_throw_null(env, "No VM can have a null name");
184 const char* name = env->GetStringUTFChars(jname, 0);
185 /* get the VM by name (VMs are just special hosts, unfortunately) */
186 msg_host_t host = MSG_host_by_name(name);
188 if (not host) { /* invalid name */
189 jxbt_throw_host_not_found(env, name);
190 env->ReleaseStringUTFChars(jname, name);
193 env->ReleaseStringUTFChars(jname, name);
195 return static_cast<jobject>(host->extension(JAVA_HOST_LEVEL));