| /* |
| * Copyright (c) 2013, 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.runtime.defmeth.shared.builder; |
| |
| import java.util.HashSet; |
| import java.util.Set; |
| import nsk.share.Pair; |
| import vm.runtime.defmeth.shared.Util; |
| import vm.runtime.defmeth.shared.data.Clazz; |
| import vm.runtime.defmeth.shared.data.method.AbstractMethod; |
| import vm.runtime.defmeth.shared.data.method.ConcreteMethod; |
| import vm.runtime.defmeth.shared.data.method.DefaultMethod; |
| import vm.runtime.defmeth.shared.data.method.Method; |
| import vm.runtime.defmeth.shared.data.method.body.CallMethod; |
| import vm.runtime.defmeth.shared.data.method.body.EmptyBody; |
| import vm.runtime.defmeth.shared.data.method.body.MethodBody; |
| import vm.runtime.defmeth.shared.data.method.body.ReturnIntBody; |
| import vm.runtime.defmeth.shared.data.method.body.ReturnNewInstanceBody; |
| import vm.runtime.defmeth.shared.data.method.body.ReturnNullBody; |
| import vm.runtime.defmeth.shared.data.method.body.ThrowExBody; |
| import vm.runtime.defmeth.shared.data.method.param.Param; |
| import static jdk.internal.org.objectweb.asm.Opcodes.*; |
| import vm.runtime.defmeth.shared.data.ConcreteClass; |
| |
| /** |
| * Builder of Method instances. |
| */ |
| public class MethodBuilder { |
| private MethodType type; |
| private int flags = 0; |
| private String name; |
| private MethodBody body; |
| |
| // Method's erased signature |
| private String desc; |
| |
| // Method's language-level signature |
| private String sig; |
| |
| private TestBuilder builder; |
| |
| /* package-private */ MethodBuilder(TestBuilder builder) { |
| this.builder = builder; |
| } |
| |
| /* package-private */ MethodBuilder type(MethodType type) { |
| this.type = type; |
| return this; |
| } |
| |
| public MethodBuilder name(String name) { |
| this.name = name; |
| |
| return this; |
| } |
| |
| public MethodBuilder desc(String desc) { |
| this.desc = desc; |
| return this; |
| } |
| |
| public MethodBuilder sig(String sig) { |
| this.sig = sig; |
| return this; |
| } |
| |
| public MethodBuilder body(MethodBody body) { |
| if (type == null || type == MethodType.ABSTRACT) { |
| throw new IllegalStateException(); |
| } |
| |
| this.body = body; |
| |
| return this; |
| } |
| |
| public MethodBuilder empty() { return body(new EmptyBody()); } |
| public MethodBuilder returns(int i) { return body(new ReturnIntBody(i)); } |
| public MethodBuilder returnsNull() { return body(new ReturnNullBody()); } |
| public MethodBuilder throws_(Clazz clz) { return body(new ThrowExBody(clz)); } |
| public MethodBuilder throws_(Class<? extends Throwable> exc) { |
| return body(new ThrowExBody(builder.toClazz(exc))); |
| } |
| |
| public MethodBuilder returnsNewInstance(ConcreteClass clz) { |
| return body(new ReturnNewInstanceBody(clz)); |
| } |
| |
| public MethodBuilder superCall(Clazz callee, String methodName, String methodDesc) { |
| return invokeSpecial(callee, methodName, methodDesc); |
| } |
| |
| public MethodBuilder invokeSpecial(Clazz callee, String methodName, String methodDesc) { |
| return invoke(CallMethod.Invoke.SPECIAL, callee, null, methodName, |
| methodDesc, CallMethod.IndexbyteOp.CALLSITE); |
| } |
| |
| public MethodBuilder invokeStatic(Clazz callee, String methodName, String methodDesc) { |
| return invoke(CallMethod.Invoke.STATIC, callee, null, methodName, |
| methodDesc, CallMethod.IndexbyteOp.CALLSITE); |
| } |
| |
| public MethodBuilder invoke(CallMethod.Invoke callInsn, Clazz staticCallee, |
| ConcreteClass callee, String methodName, String methodDesc, |
| CallMethod.IndexbyteOp generateIndexbyteOp) { |
| Pair<String[],String> calleeDetails = Util.parseDesc(methodDesc); |
| Param[] params = Util.getDefaultValues(calleeDetails.first); |
| String returnType = calleeDetails.second; |
| |
| boolean popResult = Util.isNonVoid(returnType) |
| && !Util.isNonVoid(Util.parseDesc(desc).second); |
| |
| return body(new CallMethod( |
| callInsn, staticCallee, callee, |
| methodName, methodDesc, params, returnType, |
| popResult, generateIndexbyteOp)); |
| } |
| |
| // set of accessibility flags for the method |
| private Set<AccessFlag> methodAccFlags = new HashSet<>(); |
| |
| public MethodBuilder public_() { methodAccFlags.add(AccessFlag.PUBLIC); return this; } |
| public MethodBuilder protected_() { methodAccFlags.add(AccessFlag.PROTECTED); return this; } |
| public MethodBuilder private_() { methodAccFlags.add(AccessFlag.PRIVATE); return this; } |
| public MethodBuilder package_private() { methodAccFlags.add(AccessFlag.PACKAGE_PRIVATE); return this; } |
| |
| public MethodBuilder static_() { return addFlags(ACC_STATIC); } |
| public MethodBuilder synthetic() { return addFlags(ACC_SYNTHETIC); } |
| |
| private void parseFlags(int flags) { |
| if ((flags & ACC_PUBLIC) != 0) { |
| public_(); |
| } |
| if ((flags & ACC_PROTECTED) != 0) { |
| protected_(); |
| } |
| if ((flags & ACC_PRIVATE) != 0) { |
| private_(); |
| } |
| if ((flags & (ACC_PUBLIC | ACC_PROTECTED | ACC_PRIVATE)) == 0) { |
| package_private(); |
| } |
| } |
| |
| public MethodBuilder flags(int flags) { |
| methodAccFlags.clear(); |
| |
| parseFlags(flags); |
| this.flags = flags; |
| |
| return this; |
| } |
| |
| public MethodBuilder addFlags(int flags) { |
| parseFlags(flags); |
| this.flags |= flags; |
| |
| return this; |
| } |
| |
| public Method build() { |
| if (name == null) { |
| throw new IllegalStateException(); |
| } |
| |
| int lFlags = flags; |
| if (!methodAccFlags.isEmpty()) { |
| for (AccessFlag flag : methodAccFlags) { |
| lFlags |= flag.mask; |
| } |
| } else { |
| lFlags |= AccessFlag.PUBLIC.mask; |
| } |
| |
| if (type != null) { |
| switch (type) { |
| case ABSTRACT: |
| // Excerpt from JVMS8 4.6 "Methods [Modified]: |
| // If a specific method of a class or interface has its ACC_ABSTRACT flag set, |
| // it must not have any of its ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC, ACC_STRICT, or |
| // ACC_SYNCHRONIZED flags set (8.4.3.1, 8.4.3.3, 8.4.3.4). |
| lFlags |= (builder.accFlags & ~(ACC_NATIVE | ACC_PRIVATE | ACC_STATIC | ACC_STRICT | ACC_SYNCHRONIZED)); |
| return new AbstractMethod(lFlags, name, desc, sig); |
| case CONCRETE: |
| lFlags |= builder.accFlags; |
| return new ConcreteMethod(lFlags, name, desc, sig, body); |
| case DEFAULT: |
| // Excerpt from JVMS8 4.6 "Methods [Modified]: |
| // Methods of interfaces may set any of the flags in Table 4.5 except ACC_PROTECTED, ACC_FINAL, |
| // ACC_NATIVE, and ACC_SYNCHRONIZED (9.4); they must have exactly one of the ACC_PUBLIC or |
| // ACC_PRIVATE flags set. |
| lFlags |= (builder.accFlags & ~(ACC_NATIVE | ACC_PRIVATE | ACC_STATIC | ACC_STRICT | ACC_SYNCHRONIZED)); |
| return new DefaultMethod(lFlags, name, desc, sig, body); |
| default: |
| throw new IllegalStateException(); |
| } |
| } else { |
| return new Method(lFlags, name, desc, sig); |
| } |
| } |
| } |