1 /* 2 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 #include "util.h" 27 #include "inStream.h" 28 #include "outStream.h" 29 #include "ModuleImpl.h" 30 31 32 static jclass jlrM(JNIEnv *env) { 33 return findClass(env, "Ljava/lang/reflect/Module;"); 34 } 35 36 static jboolean 37 getName(PacketInputStream *in, PacketOutputStream *out) 38 { 39 static jmethodID method = NULL; 40 JNIEnv *env = getEnv(); 41 char *name; 42 jstring namestr; 43 jobject module; 44 45 if (method == NULL) { 46 method = getMethod(env, jlrM(env), "getName", "()Ljava/lang/String;"); 47 } 48 module = inStream_readModuleRef(getEnv(), in); 49 if (inStream_error(in)) { 50 return JNI_TRUE; 51 } 52 namestr = (jstring)JNI_FUNC_PTR(env, CallObjectMethod) (env, module, method); 53 if (namestr != NULL) { 54 name = (char*)JNI_FUNC_PTR(env, GetStringUTFChars)(env, namestr, NULL); 55 } else { 56 // The JDWP converts null into an empty string 57 } 58 (void)outStream_writeString(out, name); 59 jvmtiDeallocate(name); 60 61 return JNI_TRUE; 62 } 63 64 static jboolean 65 getClassLoader(PacketInputStream *in, PacketOutputStream *out) 66 { 67 static jmethodID method = NULL; 68 JNIEnv *env = getEnv(); 69 jobject loader; 70 jobject module; 71 72 if (method == NULL) { 73 method = getMethod(env, jlrM(env), "getClassLoader", "()Ljava/lang/ClassLoader;"); 74 } 75 module = inStream_readModuleRef(env, in); 76 if (inStream_error(in)) { 77 return JNI_TRUE; 78 } 79 loader = JNI_FUNC_PTR(env, CallObjectMethod) (env, module, method); 80 81 (void)outStream_writeObjectRef(env, out, loader); 82 return JNI_TRUE; 83 } 84 85 static jboolean 86 canRead(PacketInputStream *in, PacketOutputStream *out) 87 { 88 static jmethodID method = NULL; 89 JNIEnv *env = getEnv(); 90 jboolean can_read; 91 jobject module; 92 jobject target_module; 93 94 if (method == NULL) { 95 method = getMethod(env, jlrM(env), "canRead", "(Ljava/lang/reflect/Module;)Z"); 96 } 97 module = inStream_readModuleRef(env, in); 98 if (inStream_error(in)) { 99 return JNI_TRUE; 100 } 101 target_module = inStream_readModuleRef(env, in); 102 if (inStream_error(in)) { 103 return JNI_TRUE; 104 } 105 can_read = JNI_FUNC_PTR(env, CallBooleanMethod) 106 (env, module, method, target_module); 107 108 (void)outStream_writeBoolean(out, can_read); 109 return JNI_TRUE; 110 } 111 112 113 void *Module_Cmds[] = { (void *)3 114 ,(void *)getName 115 ,(void *)getClassLoader 116 ,(void *)canRead 117 };