blob: 809317fdad777e86b0c823bd0530196842cc36c6 [file] [log] [blame]
// Copyright (c) 2018, the R8 project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
package com.android.tools.r8.cf.code;
import com.android.tools.r8.cf.CfPrinter;
import com.android.tools.r8.cf.code.CfFrame.FrameType;
import com.android.tools.r8.graph.AppView;
import com.android.tools.r8.graph.CfCode;
import com.android.tools.r8.graph.CfCompareHelper;
import com.android.tools.r8.graph.DexItemFactory;
import com.android.tools.r8.graph.DexType;
import com.android.tools.r8.graph.GraphLens;
import com.android.tools.r8.graph.InitClassLens;
import com.android.tools.r8.graph.ProgramMethod;
import com.android.tools.r8.ir.code.Monitor.Type;
import com.android.tools.r8.ir.conversion.CfSourceCode;
import com.android.tools.r8.ir.conversion.CfState;
import com.android.tools.r8.ir.conversion.CfState.Slot;
import com.android.tools.r8.ir.conversion.IRBuilder;
import com.android.tools.r8.ir.conversion.LensCodeRewriterUtils;
import com.android.tools.r8.ir.optimize.Inliner.ConstraintWithTarget;
import com.android.tools.r8.ir.optimize.InliningConstraints;
import com.android.tools.r8.naming.NamingLens;
import com.android.tools.r8.utils.structural.CompareToVisitor;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;
public class CfMonitor extends CfInstruction {
private final Type type;
public CfMonitor(Type type) {
this.type = type;
}
public Type getType() {
return type;
}
@Override
public int getCompareToId() {
return getAsmOpcode();
}
@Override
public int internalAcceptCompareTo(
CfInstruction other, CompareToVisitor visitor, CfCompareHelper helper) {
return CfCompareHelper.compareIdUniquelyDeterminesEquality(this, other);
}
@Override
public void write(
AppView<?> appView,
ProgramMethod context,
DexItemFactory dexItemFactory,
GraphLens graphLens,
InitClassLens initClassLens,
NamingLens namingLens,
LensCodeRewriterUtils rewriter,
MethodVisitor visitor) {
visitor.visitInsn(getAsmOpcode());
}
private int getAsmOpcode() {
return type == Type.ENTER ? Opcodes.MONITORENTER : Opcodes.MONITOREXIT;
}
@Override
public void print(CfPrinter printer) {
printer.print(this);
}
@Override
public boolean canThrow() {
return true;
}
@Override
public void buildIR(IRBuilder builder, CfState state, CfSourceCode code) {
Slot object = state.pop();
builder.addMonitor(type, object.register);
}
@Override
public ConstraintWithTarget inliningConstraint(
InliningConstraints inliningConstraints, CfCode code, ProgramMethod context) {
return inliningConstraints.forMonitor();
}
@Override
public void evaluate(
CfFrameVerificationHelper frameBuilder,
DexType context,
DexType returnType,
DexItemFactory factory,
InitClassLens initClassLens) {
// ..., objectref →
// ...
frameBuilder.pop(FrameType.initialized(factory.objectType));
}
}