| /* |
| * Copyright (c) 2011, 2018, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package vm.mlvm.cp.share; |
| |
| import jdk.internal.org.objectweb.asm.ByteVector; |
| import jdk.internal.org.objectweb.asm.ClassWriter; |
| import jdk.internal.org.objectweb.asm.ClassWriterExt; |
| import jdk.internal.org.objectweb.asm.MethodVisitor; |
| import jdk.internal.org.objectweb.asm.Opcodes; |
| import jdk.internal.org.objectweb.asm.Type; |
| |
| import vm.mlvm.share.ClassfileGenerator; |
| import vm.mlvm.share.Env; |
| |
| public abstract class GenFullCP extends ClassfileGenerator { |
| |
| /** |
| * Generate field description for object type from class name: |
| * return "L" + className + ";"; |
| * @param className Class name |
| * @return field descriptor representing the class type |
| */ |
| protected static String fd(String className) { |
| return "L" + className + ";"; |
| } |
| |
| // Universal constants |
| protected static final String JL_OBJECT = "java/lang/Object"; |
| protected static final String JL_CLASS = "java/lang/Class"; |
| protected static final String JL_CLASSLOADER = "java/lang/ClassLoader"; |
| protected static final String JL_STRING = "java/lang/String"; |
| protected static final String JL_RUNTIMEEXCEPTION = "java/lang/RuntimeException"; |
| protected static final String JL_BOOTSTRAPMETHODERROR = "java/lang/BootstrapMethodError"; |
| protected static final String JL_THROWABLE = "java/lang/Throwable"; |
| protected static final String JLI_METHODTYPE = "java/lang/invoke/MethodType"; |
| protected static final String JLI_METHODHANDLE = "java/lang/invoke/MethodHandle"; |
| protected static final String JLI_METHODHANDLES = "java/lang/invoke/MethodHandles"; |
| protected static final String JLI_METHODHANDLES_LOOKUP = "java/lang/invoke/MethodHandles$Lookup"; |
| protected static final String JLI_CALLSITE = "java/lang/invoke/CallSite"; |
| protected static final String JLI_CONSTANTCALLSITE = "java/lang/invoke/ConstantCallSite"; |
| |
| protected static final String VOID_NO_ARG_METHOD_SIGNATURE = "()V"; |
| |
| protected static final String NEW_INVOKE_SPECIAL_CLASS_NAME = "java/lang/invoke/NewInvokeSpecialCallSite"; |
| protected static final String NEW_INVOKE_SPECIAL_BOOTSTRAP_METHOD_SIGNATURE = "(" + fd(JLI_METHODHANDLES_LOOKUP) + fd(JL_STRING) + fd(JLI_METHODTYPE) + ")V"; |
| |
| protected static final String INIT_METHOD_NAME = "<init>"; |
| protected static final String STATIC_INIT_METHOD_NAME = "<clinit>"; |
| |
| // Generated class constants |
| protected static final int CLASSFILE_VERSION = 51; |
| |
| protected static final int CP_CONST_COUNT = 65400; |
| protected static final int MAX_METHOD_SIZE = 65400; |
| protected static final int BYTES_PER_LDC = 5; |
| protected static final int LDC_PER_METHOD = MAX_METHOD_SIZE / BYTES_PER_LDC; |
| protected static final int METHOD_COUNT = CP_CONST_COUNT / LDC_PER_METHOD; |
| |
| protected static final String PARENT_CLASS_NAME = JL_OBJECT; |
| |
| protected static final String INIT_METHOD_SIGNATURE = VOID_NO_ARG_METHOD_SIGNATURE; |
| |
| protected static final String MAIN_METHOD_NAME = "main"; |
| protected static final String MAIN_METHOD_SIGNATURE = "(" + "[" + fd(JL_STRING) + ")V"; |
| |
| protected static final String TEST_METHOD_NAME = "test"; |
| protected static final String TEST_METHOD_SIGNATURE = VOID_NO_ARG_METHOD_SIGNATURE; |
| |
| protected static final String STATIC_FIELD_NAME = "testStatic"; |
| protected static final String STATIC_FIELD_SIGNATURE = "Z"; |
| |
| protected static final String INSTANCE_FIELD_NAME = "testInstance"; |
| protected static final String INSTANCE_FIELD_SIGNATURE = "Z"; |
| |
| protected static final String STATIC_BOOTSTRAP_FIELD_NAME = "testCSStatic"; |
| protected static final String STATIC_BOOTSTRAP_FIELD_SIGNATURE = fd(JLI_CALLSITE); |
| |
| protected static final String INSTANCE_BOOTSTRAP_FIELD_NAME = "testCSInstance"; |
| protected static final String INSTANCE_BOOTSTRAP_FIELD_SIGNATURE = fd(JLI_CALLSITE); |
| |
| protected static final String BOOTSTRAP_METHOD_NAME = "bootstrap"; |
| protected static final String BOOTSTRAP_METHOD_SIGNATURE = "(" + fd(JLI_METHODHANDLES_LOOKUP) + fd(JL_STRING) + fd(JLI_METHODTYPE) + ")" + fd(JLI_CALLSITE); |
| |
| protected static final String INSTANCE_BOOTSTRAP_METHOD_NAME = "bootstrapInstance"; |
| protected static final String INSTANCE_BOOTSTRAP_METHOD_SIGNATURE = BOOTSTRAP_METHOD_SIGNATURE; |
| |
| protected static final String TARGET_METHOD_NAME = "target"; |
| protected static final String TARGET_METHOD_SIGNATURE = VOID_NO_ARG_METHOD_SIGNATURE; |
| |
| protected static final String INSTANCE_TARGET_METHOD_NAME = "targetInstance"; |
| protected static final String INSTANCE_TARGET_METHOD_SIGNATURE = VOID_NO_ARG_METHOD_SIGNATURE; |
| |
| protected interface DummyInterface { |
| public void targetInstance(); |
| } |
| |
| // Helper methods |
| |
| protected static String getDummyInterfaceClassName() { |
| return DummyInterface.class.getName().replace('.', '/'); |
| } |
| |
| protected static void createLogMsgCode(MethodVisitor mv, String msg) { |
| mv.visitLdcInsn(msg); |
| mv.visitMethodInsn(Opcodes.INVOKESTATIC, "vm/mlvm/share/Env", "traceVerbose", "(Ljava/lang/String;)V"); |
| } |
| |
| protected static void createThrowRuntimeExceptionCode(MethodVisitor mv, String msg) { |
| createThrowRuntimeExceptionCodeHelper(mv, msg, false); |
| } |
| |
| // Expects a throwable (the cause) to be on top of the stack when called. |
| protected static void createThrowRuntimeExceptionCodeWithCause(MethodVisitor mv, String msg) { |
| createThrowRuntimeExceptionCodeHelper(mv, msg, true); |
| } |
| |
| // If set_cause is true it expects a Throwable (the cause) to be on top of the stack when called. |
| protected static void createThrowRuntimeExceptionCodeHelper(MethodVisitor mv, String msg, boolean set_cause) { |
| mv.visitTypeInsn(Opcodes.NEW, JL_RUNTIMEEXCEPTION); |
| mv.visitInsn(Opcodes.DUP); |
| mv.visitLdcInsn(msg); |
| mv.visitMethodInsn(Opcodes.INVOKESPECIAL, JL_RUNTIMEEXCEPTION, |
| INIT_METHOD_NAME, "(" + fd(JL_STRING) + ")V"); |
| if (set_cause) { |
| mv.visitInsn(Opcodes.SWAP); |
| mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, JL_RUNTIMEEXCEPTION, |
| "initCause", "(" + fd(JL_THROWABLE) + ")"+ fd(JL_THROWABLE)); |
| } |
| mv.visitInsn(Opcodes.ATHROW); |
| } |
| |
| protected static void createThrowRuntimeExceptionMethod(ClassWriter cw, boolean isStatic, String methodName, String methodSignature) { |
| MethodVisitor mv = cw.visitMethod( |
| Opcodes.ACC_PUBLIC | (isStatic ? Opcodes.ACC_STATIC : 0), |
| methodName, methodSignature, |
| null, |
| new String[0]); |
| |
| createThrowRuntimeExceptionCode(mv, "Method " + methodName + methodSignature + " should not be called!"); |
| |
| mv.visitMaxs(-1, -1); |
| mv.visitEnd(); |
| } |
| |
| protected static void finishMethodCode(MethodVisitor mv) { |
| finishMethodCode(mv, Opcodes.RETURN); |
| } |
| |
| protected static void finishMethodCode(MethodVisitor mv, int returnOpcode) { |
| mv.visitInsn(returnOpcode); |
| mv.visitMaxs(-1, -1); |
| mv.visitEnd(); |
| } |
| |
| protected void createClassInitMethod(ClassWriter cw) { |
| } |
| |
| protected void createInitMethod(ClassWriter cw) { |
| MethodVisitor mv = cw.visitMethod( |
| Opcodes.ACC_PUBLIC, |
| INIT_METHOD_NAME, INIT_METHOD_SIGNATURE, |
| null, |
| new String[0]); |
| |
| mv.visitIntInsn(Opcodes.ALOAD, 0); |
| mv.visitMethodInsn(Opcodes.INVOKESPECIAL, |
| PARENT_CLASS_NAME, |
| INIT_METHOD_NAME, INIT_METHOD_SIGNATURE); |
| |
| createLogMsgCode(mv, fullClassName + " constructor called"); |
| |
| finishMethodCode(mv); |
| } |
| |
| protected void createTargetMethod(ClassWriter cw) { |
| MethodVisitor mv = cw.visitMethod( |
| Opcodes.ACC_PUBLIC | Opcodes.ACC_STATIC, |
| TARGET_METHOD_NAME, TARGET_METHOD_SIGNATURE, |
| null, |
| new String[0]); |
| |
| createLogMsgCode(mv, fullClassName + "." + TARGET_METHOD_NAME + TARGET_METHOD_SIGNATURE + " called"); |
| |
| finishMethodCode(mv); |
| } |
| |
| protected void createBootstrapMethod(ClassWriter cw) { |
| createBootstrapMethod(cw, true, BOOTSTRAP_METHOD_NAME, BOOTSTRAP_METHOD_SIGNATURE); |
| } |
| |
| protected void createBootstrapMethod(ClassWriter cw, boolean isStatic, String methodName, String methodSignature) { |
| MethodVisitor mv = cw.visitMethod( |
| (isStatic ? Opcodes.ACC_STATIC : 0) | Opcodes.ACC_PUBLIC, |
| methodName, methodSignature, |
| null, new String[0]); |
| |
| createLogMsgCode(mv, fullClassName + "." + BOOTSTRAP_METHOD_NAME + BOOTSTRAP_METHOD_SIGNATURE + " called"); |
| |
| int argShift = isStatic ? 0 : 1; |
| |
| mv.visitTypeInsn(Opcodes.NEW, JLI_CONSTANTCALLSITE); |
| mv.visitInsn(Opcodes.DUP); |
| mv.visitVarInsn(Opcodes.ALOAD, 0 + argShift); |
| mv.visitLdcInsn(Type.getObjectType(fullClassName)); |
| mv.visitVarInsn(Opcodes.ALOAD, 1 + argShift); |
| mv.visitVarInsn(Opcodes.ALOAD, 2 + argShift); |
| mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, |
| JLI_METHODHANDLES_LOOKUP, "findStatic", |
| "(" + fd(JL_CLASS) + fd(JL_STRING) + fd(JLI_METHODTYPE) + ")" + fd(JLI_METHODHANDLE)); |
| mv.visitMethodInsn(Opcodes.INVOKESPECIAL, JLI_CONSTANTCALLSITE, |
| INIT_METHOD_NAME, "(" + fd(JLI_METHODHANDLE) + ")V"); |
| |
| finishMethodCode(mv, Opcodes.ARETURN); |
| } |
| |
| @Override |
| public Klass[] generateBytecodes() { |
| |
| // COMPUTE_FRAMES were disabled due to JDK-8079697 |
| ClassWriterExt cw = new ClassWriterExt(/*ClassWriter.COMPUTE_FRAMES |*/ ClassWriter.COMPUTE_MAXS); |
| |
| String[] interfaces = new String[1]; |
| interfaces[0] = getDummyInterfaceClassName(); |
| cw.visit(CLASSFILE_VERSION, Opcodes.ACC_PUBLIC, fullClassName, null, PARENT_CLASS_NAME, interfaces); |
| |
| generateCommonData(cw); |
| |
| MethodVisitor mainMV = cw.visitMethod( |
| Opcodes.ACC_PUBLIC | Opcodes.ACC_STATIC, |
| MAIN_METHOD_NAME, MAIN_METHOD_SIGNATURE, |
| null, new String[0]); |
| |
| mainMV.visitTypeInsn(Opcodes.NEW, fullClassName); |
| mainMV.visitInsn(Opcodes.DUP); |
| mainMV.visitMethodInsn(Opcodes.INVOKESPECIAL, fullClassName, INIT_METHOD_NAME, INIT_METHOD_SIGNATURE); |
| |
| int constCount = 0; |
| int methodNum = 0; |
| |
| // TODO: check real CP size and also limit number of iterations in this cycle |
| while (constCount < CP_CONST_COUNT) { |
| final String methodName = TEST_METHOD_NAME + String.format("%02d", methodNum); |
| |
| MethodVisitor mw = cw.visitMethod( |
| Opcodes.ACC_PUBLIC, |
| methodName, TEST_METHOD_SIGNATURE, |
| null, new String[0]); |
| |
| generateTestMethodProlog(mw); |
| |
| // TODO: check real CP size and also limit number of iterations in this cycle |
| while (constCount < CP_CONST_COUNT && cw.getBytecodeLength(mw) < MAX_METHOD_SIZE) { |
| generateCPEntryData(cw, mw); |
| ++constCount; |
| } |
| |
| generateTestMethodEpilog(mw); |
| |
| mw.visitMaxs(-1, -1); |
| mw.visitEnd(); |
| |
| Env.traceNormal("Method " + fullClassName + "." + methodName + "(): " |
| + constCount + " constants in CP, " |
| + cw.getBytecodeLength(mw) + " bytes of code"); |
| |
| mainMV.visitInsn(Opcodes.DUP); |
| mainMV.visitMethodInsn(Opcodes.INVOKEVIRTUAL, fullClassName, methodName, TEST_METHOD_SIGNATURE); |
| |
| ++methodNum; |
| } |
| |
| mainMV.visitInsn(Opcodes.POP); |
| finishMethodCode(mainMV); |
| |
| cw.visitEnd(); |
| return new Klass[] { new Klass(this.pkgName, this.shortClassName, MAIN_METHOD_NAME, MAIN_METHOD_SIGNATURE, cw.toByteArray()) }; |
| } |
| |
| protected void generateCommonData(ClassWriterExt cw) { |
| createClassInitMethod(cw); |
| createInitMethod(cw); |
| createTargetMethod(cw); |
| createBootstrapMethod(cw); |
| } |
| |
| protected void generateTestMethodProlog(MethodVisitor mw) { |
| } |
| |
| protected abstract void generateCPEntryData(ClassWriter cw, MethodVisitor mw); |
| |
| protected void generateTestMethodEpilog(MethodVisitor mw) { |
| mw.visitInsn(Opcodes.RETURN); |
| } |
| |
| } |