1 /* Functions related to the Virtual Machines. */
3 /* Copyright (c) 2012-2017. 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.h"
11 #include "src/plugins/vm/VirtualMachineImpl.hpp"
14 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(java);
18 extern int JAVA_HOST_LEVEL;
19 static jfieldID jvm_field_bind;
21 void jvm_bind(JNIEnv *env, jobject jvm, msg_vm_t vm)
23 env->SetLongField(jvm, jvm_field_bind, (intptr_t)vm);
26 msg_vm_t jvm_get_native(JNIEnv *env, jobject jvm)
28 return (msg_vm_t)(intptr_t)env->GetLongField(jvm, jvm_field_bind);
31 JNIEXPORT void JNICALL Java_org_simgrid_msg_VM_nativeInit(JNIEnv *env, jclass cls)
33 jclass jprocess_class_VM = env->FindClass("org/simgrid/msg/VM");
34 jvm_field_bind = jxbt_get_jfield(env, jprocess_class_VM, "bind", "J");
35 xbt_assert(jvm_field_bind, "Native initialization of msg/VM failed. Please report that bug");
38 JNIEXPORT jint JNICALL Java_org_simgrid_msg_VM_isCreated(JNIEnv * env, jobject jvm)
40 msg_vm_t vm = jvm_get_native(env,jvm);
41 return MSG_vm_is_created(vm);
44 JNIEXPORT jint JNICALL Java_org_simgrid_msg_VM_isRunning(JNIEnv * env, jobject jvm)
46 msg_vm_t vm = jvm_get_native(env,jvm);
47 return (jint) MSG_vm_is_running(vm);
50 JNIEXPORT jint JNICALL Java_org_simgrid_msg_VM_isMigrating(JNIEnv * env, jobject jvm)
52 msg_vm_t vm = jvm_get_native(env,jvm);
53 return (jint) MSG_vm_is_migrating(vm);
56 JNIEXPORT jint JNICALL Java_org_simgrid_msg_VM_isSuspended(JNIEnv * env, jobject jvm)
58 msg_vm_t vm = jvm_get_native(env,jvm);
59 return (jint) MSG_vm_is_suspended(vm);
62 JNIEXPORT void JNICALL Java_org_simgrid_msg_VM_setBound(JNIEnv *env, jobject jvm, jdouble bound)
64 msg_vm_t vm = jvm_get_native(env,jvm);
65 MSG_vm_set_bound(vm, bound);
68 JNIEXPORT void JNICALL Java_org_simgrid_msg_VM_create(JNIEnv* env, jobject jVm, jobject jHost, jstring jname,
69 jint coreAmount, jint jramsize, jint jmig_netspeed,
72 msg_host_t host = jhost_get_native(env, jHost);
74 const char* name = env->GetStringUTFChars(jname, 0);
75 msg_vm_t vm = MSG_vm_create(host, name, static_cast<int>(coreAmount), static_cast<int>(jramsize),
76 static_cast<int>(jmig_netspeed), static_cast<int>(jdp_intensity));
77 env->ReleaseStringUTFChars(jname, name);
79 jvm_bind(env, jVm, vm);
80 jVm = env->NewWeakGlobalRef(jVm);
81 // We use the extension level of the host, even if that's somehow disturbing
82 vm->extension_set(JAVA_HOST_LEVEL, (void*)jVm);
85 JNIEXPORT jobjectArray JNICALL Java_org_simgrid_msg_VM_all(JNIEnv* env, jclass cls_arg)
87 xbt_dynar_t hosts = MSG_hosts_as_dynar();
88 std::vector<jobject> vms;
92 xbt_dynar_foreach (hosts, it, h) {
93 simgrid::s4u::VirtualMachine* vm = dynamic_cast<simgrid::s4u::VirtualMachine*>(h);
94 if (vm != nullptr && vm->getState() != SURF_VM_STATE_DESTROYED) {
95 jobject jvm = static_cast<jobject>(vm->extension(JAVA_HOST_LEVEL));
99 xbt_dynar_free(&hosts);
102 int count = vms.size();
104 jclass cls = jxbt_get_class(env, "org/simgrid/msg/VM");
108 jobjectArray jtable = env->NewObjectArray((jsize)count, cls, nullptr);
110 jxbt_throw_jni(env, "Hosts table allocation failed");
114 for (int index = 0; index < count; index++) {
115 jobject jhost = vms.at(index);
116 env->SetObjectArrayElement(jtable, index, jhost);
121 JNIEXPORT void JNICALL Java_org_simgrid_msg_VM_nativeFinalize(JNIEnv *env, jobject jvm)
123 msg_vm_t vm = jvm_get_native(env,jvm);
127 JNIEXPORT void JNICALL Java_org_simgrid_msg_VM_start(JNIEnv *env, jobject jvm)
129 msg_vm_t vm = jvm_get_native(env,jvm);
133 JNIEXPORT void JNICALL Java_org_simgrid_msg_VM_shutdown(JNIEnv *env, jobject jvm)
135 msg_vm_t vm = jvm_get_native(env,jvm);
138 auto vmList = &simgrid::vm::VirtualMachineImpl::allVms_;
140 std::remove_if(vmList->begin(), vmList->end(), [vm](simgrid::s4u::VirtualMachine* it) {
147 JNIEXPORT void JNICALL Java_org_simgrid_msg_VM_nativeMigration(JNIEnv* env, jobject jvm, jobject jhost)
149 msg_vm_t vm = jvm_get_native(env,jvm);
150 msg_host_t host = jhost_get_native(env, jhost);
152 MSG_vm_migrate(vm,host);
155 XBT_VERB("CATCH EXCEPTION MIGRATION %s",e.what());
156 jxbt_throw_host_failure(env, (char*)"during migration");
160 JNIEXPORT void JNICALL Java_org_simgrid_msg_VM_suspend(JNIEnv *env, jobject jvm)
162 msg_vm_t vm = jvm_get_native(env,jvm);
166 JNIEXPORT void JNICALL Java_org_simgrid_msg_VM_resume(JNIEnv *env, jobject jvm)
168 msg_vm_t vm = jvm_get_native(env,jvm);
172 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_VM_getVMByName(JNIEnv* env, jclass cls, jstring jname)
175 /* get the C string from the java string */
176 if (jname == nullptr) {
177 jxbt_throw_null(env, bprintf("No VM can have a null name"));
180 const char* name = env->GetStringUTFChars(jname, 0);
181 /* get the VM by name (VMs are just special hosts, unfortunately) */
182 msg_host_t host = MSG_host_by_name(name);
184 if (not host) { /* invalid name */
185 jxbt_throw_host_not_found(env, name);
186 env->ReleaseStringUTFChars(jname, name);
189 env->ReleaseStringUTFChars(jname, name);
191 return static_cast<jobject>(host->extension(JAVA_HOST_LEVEL));