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 jramsize, jint jmig_netspeed, jint jdp_intensity)
71 msg_host_t host = jhost_get_native(env, jhost);
73 const char* name = env->GetStringUTFChars(jname, 0);
74 msg_vm_t vm = MSG_vm_create(host, name, static_cast<int>(jramsize), static_cast<int>(jmig_netspeed),
75 static_cast<int>(jdp_intensity));
76 env->ReleaseStringUTFChars(jname, name);
78 jvm_bind(env, jvm, vm);
79 jvm = env->NewWeakGlobalRef(jvm);
80 // We use the extension level of the host, even if that's somehow disturbing
81 vm->extension_set(JAVA_HOST_LEVEL, (void*)jvm);
84 JNIEXPORT jobjectArray JNICALL Java_org_simgrid_msg_VM_all(JNIEnv* env, jclass cls_arg)
86 xbt_dynar_t hosts = MSG_hosts_as_dynar();
87 std::vector<jobject> vms;
91 xbt_dynar_foreach (hosts, it, h) {
92 simgrid::s4u::VirtualMachine* vm = dynamic_cast<simgrid::s4u::VirtualMachine*>(h);
93 if (vm != nullptr && vm->getState() != SURF_VM_STATE_DESTROYED) {
94 jobject jvm = static_cast<jobject>(vm->extension(JAVA_HOST_LEVEL));
98 xbt_dynar_free(&hosts);
101 int count = vms.size();
103 jclass cls = jxbt_get_class(env, "org/simgrid/msg/VM");
107 jobjectArray jtable = env->NewObjectArray((jsize)count, cls, nullptr);
109 jxbt_throw_jni(env, "Hosts table allocation failed");
113 for (int index = 0; index < count; index++) {
114 jobject jhost = vms.at(index);
115 env->SetObjectArrayElement(jtable, index, jhost);
120 JNIEXPORT void JNICALL Java_org_simgrid_msg_VM_nativeFinalize(JNIEnv *env, jobject jvm)
122 msg_vm_t vm = jvm_get_native(env,jvm);
126 JNIEXPORT void JNICALL Java_org_simgrid_msg_VM_start(JNIEnv *env, jobject jvm)
128 msg_vm_t vm = jvm_get_native(env,jvm);
132 JNIEXPORT void JNICALL Java_org_simgrid_msg_VM_shutdown(JNIEnv *env, jobject jvm)
134 msg_vm_t vm = jvm_get_native(env,jvm);
137 auto vmList = &simgrid::vm::VirtualMachineImpl::allVms_;
139 std::remove_if(vmList->begin(), vmList->end(), [vm](simgrid::s4u::VirtualMachine* it) { return vm == it; }),
144 JNIEXPORT void JNICALL Java_org_simgrid_msg_VM_nativeMigration(JNIEnv* env, jobject jvm, jobject jhost)
146 msg_vm_t vm = jvm_get_native(env,jvm);
147 msg_host_t host = jhost_get_native(env, jhost);
149 MSG_vm_migrate(vm,host);
152 XBT_VERB("CATCH EXCEPTION MIGRATION %s",e.what());
153 jxbt_throw_host_failure(env, (char*)"during migration");
157 JNIEXPORT void JNICALL Java_org_simgrid_msg_VM_suspend(JNIEnv *env, jobject jvm)
159 msg_vm_t vm = jvm_get_native(env,jvm);
163 JNIEXPORT void JNICALL Java_org_simgrid_msg_VM_resume(JNIEnv *env, jobject jvm)
165 msg_vm_t vm = jvm_get_native(env,jvm);
169 JNIEXPORT jobject JNICALL Java_org_simgrid_msg_VM_getVMByName(JNIEnv* env, jclass cls, jstring jname)
172 /* get the C string from the java string */
173 if (jname == nullptr) {
174 jxbt_throw_null(env, bprintf("No VM can have a null name"));
177 const char* name = env->GetStringUTFChars(jname, 0);
178 /* get the VM by name (VMs are just special hosts, unfortunately) */
179 msg_host_t host = MSG_host_by_name(name);
181 if (!host) { /* invalid name */
182 jxbt_throw_host_not_found(env, name);
183 env->ReleaseStringUTFChars(jname, name);
186 env->ReleaseStringUTFChars(jname, name);
188 return static_cast<jobject>(host->extension(JAVA_HOST_LEVEL));