--- a/langtools/src/jdk.compiler/share/classes/com/sun/tools/javap/StackMapWriter.java Wed May 27 11:27:42 2015 +0530
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,289 +0,0 @@
-/*
- * Copyright (c) 2009, 2013, 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. Oracle designates this
- * particular file as subject to the "Classpath" exception as provided
- * by Oracle in the LICENSE file that accompanied this code.
- *
- * 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 com.sun.tools.javap;
-
-import java.util.Arrays;
-import java.util.HashMap;
-import java.util.Map;
-
-import com.sun.tools.classfile.AccessFlags;
-import com.sun.tools.classfile.Attribute;
-import com.sun.tools.classfile.Code_attribute;
-import com.sun.tools.classfile.ConstantPool;
-import com.sun.tools.classfile.ConstantPoolException;
-import com.sun.tools.classfile.Descriptor;
-import com.sun.tools.classfile.Descriptor.InvalidDescriptor;
-import com.sun.tools.classfile.Instruction;
-import com.sun.tools.classfile.Method;
-import com.sun.tools.classfile.StackMapTable_attribute;
-import com.sun.tools.classfile.StackMapTable_attribute.*;
-
-import static com.sun.tools.classfile.StackMapTable_attribute.verification_type_info.*;
-
-/**
- * Annotate instructions with stack map.
- *
- * <p><b>This is NOT part of any supported API.
- * If you write code that depends on this, you do so at your own risk.
- * This code and its internal interfaces are subject to change or
- * deletion without notice.</b>
- */
-public class StackMapWriter extends InstructionDetailWriter {
- static StackMapWriter instance(Context context) {
- StackMapWriter instance = context.get(StackMapWriter.class);
- if (instance == null)
- instance = new StackMapWriter(context);
- return instance;
- }
-
- protected StackMapWriter(Context context) {
- super(context);
- context.put(StackMapWriter.class, this);
- classWriter = ClassWriter.instance(context);
- }
-
- public void reset(Code_attribute attr) {
- setStackMap((StackMapTable_attribute) attr.attributes.get(Attribute.StackMapTable));
- }
-
- void setStackMap(StackMapTable_attribute attr) {
- if (attr == null) {
- map = null;
- return;
- }
-
- Method m = classWriter.getMethod();
- Descriptor d = m.descriptor;
- String[] args;
- try {
- ConstantPool cp = classWriter.getClassFile().constant_pool;
- String argString = d.getParameterTypes(cp);
- args = argString.substring(1, argString.length() - 1).split("[, ]+");
- } catch (ConstantPoolException | InvalidDescriptor e) {
- return;
- }
- boolean isStatic = m.access_flags.is(AccessFlags.ACC_STATIC);
-
- verification_type_info[] initialLocals = new verification_type_info[(isStatic ? 0 : 1) + args.length];
- if (!isStatic)
- initialLocals[0] = new CustomVerificationTypeInfo("this");
- for (int i = 0; i < args.length; i++) {
- initialLocals[(isStatic ? 0 : 1) + i] =
- new CustomVerificationTypeInfo(args[i].replace(".", "/"));
- }
-
- map = new HashMap<>();
- StackMapBuilder builder = new StackMapBuilder();
-
- // using -1 as the pc for the initial frame effectively compensates for
- // the difference in behavior for the first stack map frame (where the
- // pc offset is just offset_delta) compared to subsequent frames (where
- // the pc offset is always offset_delta+1).
- int pc = -1;
-
- map.put(pc, new StackMap(initialLocals, empty));
-
- for (int i = 0; i < attr.entries.length; i++)
- pc = attr.entries[i].accept(builder, pc);
- }
-
- public void writeInitialDetails() {
- writeDetails(-1);
- }
-
- public void writeDetails(Instruction instr) {
- writeDetails(instr.getPC());
- }
-
- private void writeDetails(int pc) {
- if (map == null)
- return;
-
- StackMap m = map.get(pc);
- if (m != null) {
- print("StackMap locals: ", m.locals);
- print("StackMap stack: ", m.stack);
- }
-
- }
-
- void print(String label, verification_type_info[] entries) {
- print(label);
- for (int i = 0; i < entries.length; i++) {
- print(" ");
- print(entries[i]);
- }
- println();
- }
-
- void print(verification_type_info entry) {
- if (entry == null) {
- print("ERROR");
- return;
- }
-
- switch (entry.tag) {
- case -1:
- print(((CustomVerificationTypeInfo) entry).text);
- break;
-
- case ITEM_Top:
- print("top");
- break;
-
- case ITEM_Integer:
- print("int");
- break;
-
- case ITEM_Float:
- print("float");
- break;
-
- case ITEM_Long:
- print("long");
- break;
-
- case ITEM_Double:
- print("double");
- break;
-
- case ITEM_Null:
- print("null");
- break;
-
- case ITEM_UninitializedThis:
- print("uninit_this");
- break;
-
- case ITEM_Object:
- try {
- ConstantPool cp = classWriter.getClassFile().constant_pool;
- ConstantPool.CONSTANT_Class_info class_info = cp.getClassInfo(((Object_variable_info) entry).cpool_index);
- print(cp.getUTF8Value(class_info.name_index));
- } catch (ConstantPoolException e) {
- print("??");
- }
- break;
-
- case ITEM_Uninitialized:
- print(((Uninitialized_variable_info) entry).offset);
- break;
- }
-
- }
-
- private Map<Integer, StackMap> map;
- private ClassWriter classWriter;
-
- class StackMapBuilder
- implements StackMapTable_attribute.stack_map_frame.Visitor<Integer, Integer> {
-
- public Integer visit_same_frame(same_frame frame, Integer pc) {
- int new_pc = pc + frame.getOffsetDelta() + 1;
- StackMap m = map.get(pc);
- assert (m != null);
- map.put(new_pc, m);
- return new_pc;
- }
-
- public Integer visit_same_locals_1_stack_item_frame(same_locals_1_stack_item_frame frame, Integer pc) {
- int new_pc = pc + frame.getOffsetDelta() + 1;
- StackMap prev = map.get(pc);
- assert (prev != null);
- StackMap m = new StackMap(prev.locals, frame.stack);
- map.put(new_pc, m);
- return new_pc;
- }
-
- public Integer visit_same_locals_1_stack_item_frame_extended(same_locals_1_stack_item_frame_extended frame, Integer pc) {
- int new_pc = pc + frame.getOffsetDelta() + 1;
- StackMap prev = map.get(pc);
- assert (prev != null);
- StackMap m = new StackMap(prev.locals, frame.stack);
- map.put(new_pc, m);
- return new_pc;
- }
-
- public Integer visit_chop_frame(chop_frame frame, Integer pc) {
- int new_pc = pc + frame.getOffsetDelta() + 1;
- StackMap prev = map.get(pc);
- assert (prev != null);
- int k = 251 - frame.frame_type;
- verification_type_info[] new_locals = Arrays.copyOf(prev.locals, prev.locals.length - k);
- StackMap m = new StackMap(new_locals, empty);
- map.put(new_pc, m);
- return new_pc;
- }
-
- public Integer visit_same_frame_extended(same_frame_extended frame, Integer pc) {
- int new_pc = pc + frame.getOffsetDelta();
- StackMap m = map.get(pc);
- assert (m != null);
- map.put(new_pc, m);
- return new_pc;
- }
-
- public Integer visit_append_frame(append_frame frame, Integer pc) {
- int new_pc = pc + frame.getOffsetDelta() + 1;
- StackMap prev = map.get(pc);
- assert (prev != null);
- verification_type_info[] new_locals = new verification_type_info[prev.locals.length + frame.locals.length];
- System.arraycopy(prev.locals, 0, new_locals, 0, prev.locals.length);
- System.arraycopy(frame.locals, 0, new_locals, prev.locals.length, frame.locals.length);
- StackMap m = new StackMap(new_locals, empty);
- map.put(new_pc, m);
- return new_pc;
- }
-
- public Integer visit_full_frame(full_frame frame, Integer pc) {
- int new_pc = pc + frame.getOffsetDelta() + 1;
- StackMap m = new StackMap(frame.locals, frame.stack);
- map.put(new_pc, m);
- return new_pc;
- }
-
- }
-
- static class StackMap {
- StackMap(verification_type_info[] locals, verification_type_info[] stack) {
- this.locals = locals;
- this.stack = stack;
- }
-
- private final verification_type_info[] locals;
- private final verification_type_info[] stack;
- }
-
- static class CustomVerificationTypeInfo extends verification_type_info {
- public CustomVerificationTypeInfo(String text) {
- super(-1);
- this.text = text;
- }
- private String text;
- }
-
- private final verification_type_info[] empty = { };
-}