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/*
* Copyright (C) 2007 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.dx.command.dump;
import com.android.dx.cf.code.ConcreteMethod;
import com.android.dx.cf.code.Ropper;
import com.android.dx.cf.iface.Member;
import com.android.dx.cf.iface.Method;
import com.android.dx.rop.code.RopMethod;
import com.android.dx.rop.code.TranslationAdvice;
import com.android.dx.rop.code.DexTranslationAdvice;
import com.android.dx.rop.code.AccessFlags;
import com.android.dx.ssa.DeadCodeRemover;
import com.android.dx.ssa.PhiTypeResolver;
import com.android.dx.ssa.SsaBasicBlock;
import com.android.dx.ssa.SsaConverter;
import com.android.dx.ssa.SsaInsn;
import com.android.dx.ssa.SsaMethod;
import com.android.dx.ssa.Optimizer;
import com.android.dx.ssa.ConstCollector;
import com.android.dx.ssa.SCCP;
import com.android.dx.ssa.LiteralOpUpgrader;
import com.android.dx.ssa.back.SsaToRop;
import com.android.dx.util.ByteArray;
import com.android.dx.util.Hex;
import com.android.dx.util.IntList;
import java.io.PrintStream;
import java.util.ArrayList;
import java.util.BitSet;
import java.util.Collections;
import java.util.EnumSet;
/**
* Dumper for the SSA-translated blocks of a method.
*/
public class SsaDumper extends BlockDumper {
/**
* Does the dump.
*
* @param bytes {@code non-null;} bytes of the original class file
* @param out {@code non-null;} where to dump to
* @param filePath the file path for the class, excluding any base
* directory specification
* @param args commandline parsedArgs
*/
public static void dump(byte[] bytes, PrintStream out,
String filePath, Args args) {
SsaDumper sd = new SsaDumper(bytes, out, filePath, args);
sd.dump();
}
/**
* Constructs an instance.
*
* @param bytes {@code non-null;} bytes of the original class file
* @param out {@code non-null;} where to dump to
* @param filePath the file path for the class, excluding any base
* directory specification
* @param args commandline parsedArgs
*/
private SsaDumper(byte[] bytes, PrintStream out, String filePath,
Args args) {
super(bytes, out, filePath, true, args);
}
/** {@inheritDoc} */
@Override
public void endParsingMember(ByteArray bytes, int offset, String name,
String descriptor, Member member) {
if (!(member instanceof Method)) {
return;
}
if (!shouldDumpMethod(name)) {
return;
}
ConcreteMethod meth =
new ConcreteMethod((Method) member, classFile, true, true);
TranslationAdvice advice = DexTranslationAdvice.THE_ONE;
RopMethod rmeth = Ropper.convert(meth, advice);
SsaMethod ssaMeth = null;
boolean isStatic = AccessFlags.isStatic(meth.getAccessFlags());
int paramWidth = computeParamWidth(meth, isStatic);
if (args.ssaStep == null) {
ssaMeth = Optimizer.debugNoRegisterAllocation(rmeth,
paramWidth, isStatic, true, advice,
EnumSet.allOf(Optimizer.OptionalStep.class));
} else if ("edge-split".equals(args.ssaStep)) {
ssaMeth = Optimizer.debugEdgeSplit(rmeth, paramWidth,
isStatic, true, advice);
} else if ("phi-placement".equals(args.ssaStep)) {
ssaMeth = Optimizer.debugPhiPlacement(
rmeth, paramWidth, isStatic, true, advice);
} else if ("renaming".equals(args.ssaStep)) {
ssaMeth = Optimizer.debugRenaming(
rmeth, paramWidth, isStatic, true, advice);
} else if ("dead-code".equals(args.ssaStep)) {
ssaMeth = Optimizer.debugDeadCodeRemover(
rmeth, paramWidth, isStatic,true, advice);
}
StringBuffer sb = new StringBuffer(2000);
sb.append("first ");
sb.append(Hex.u2(
ssaMeth.blockIndexToRopLabel(ssaMeth.getEntryBlockIndex())));
sb.append('\n');
ArrayList<SsaBasicBlock> blocks = ssaMeth.getBlocks();
ArrayList<SsaBasicBlock> sortedBlocks =
(ArrayList<SsaBasicBlock>) blocks.clone();
Collections.sort(sortedBlocks, SsaBasicBlock.LABEL_COMPARATOR);
for (SsaBasicBlock block : sortedBlocks) {
sb.append("block ")
.append(Hex.u2(block.getRopLabel())).append('\n');
BitSet preds = block.getPredecessors();
for (int i = preds.nextSetBit(0); i >= 0;
i = preds.nextSetBit(i+1)) {
sb.append(" pred ");
sb.append(Hex.u2(ssaMeth.blockIndexToRopLabel(i)));
sb.append('\n');
}
sb.append(" live in:" + block.getLiveInRegs());
sb.append("\n");
for (SsaInsn insn : block.getInsns()) {
sb.append(" ");
sb.append(insn.toHuman());
sb.append('\n');
}
if (block.getSuccessors().cardinality() == 0) {
sb.append(" returns\n");
} else {
int primary = block.getPrimarySuccessorRopLabel();
IntList succLabelList = block.getRopLabelSuccessorList();
int szSuccLabels = succLabelList.size();
for (int i = 0; i < szSuccLabels; i++) {
sb.append(" next ");
sb.append(Hex.u2(succLabelList.get(i)));
if (szSuccLabels != 1 && primary == succLabelList.get(i)) {
sb.append(" *");
}
sb.append('\n');
}
}
sb.append(" live out:" + block.getLiveOutRegs());
sb.append("\n");
}
suppressDump = false;
setAt(bytes, 0);
parsed(bytes, 0, bytes.size(), sb.toString());
suppressDump = true;
}
}
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