diff options
Diffstat (limited to 'src/org/jetbrains/java/decompiler/main/AssertProcessor.java')
| -rw-r--r-- | src/org/jetbrains/java/decompiler/main/AssertProcessor.java | 590 |
1 files changed, 292 insertions, 298 deletions
diff --git a/src/org/jetbrains/java/decompiler/main/AssertProcessor.java b/src/org/jetbrains/java/decompiler/main/AssertProcessor.java index 86e5c59..265ca5c 100644 --- a/src/org/jetbrains/java/decompiler/main/AssertProcessor.java +++ b/src/org/jetbrains/java/decompiler/main/AssertProcessor.java @@ -1,23 +1,20 @@ /* - * Fernflower - The Analytical Java Decompiler - * http://www.reversed-java.com + * Copyright 2000-2014 JetBrains s.r.o. * - * (C) 2008 - 2010, Stiver + * 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 * - * This software is NEITHER public domain NOR free software - * as per GNU License. See license.txt for more details. + * http://www.apache.org/licenses/LICENSE-2.0 * - * This software is distributed WITHOUT ANY WARRANTY; without - * even the implied warranty of MERCHANTABILITY or FITNESS FOR - * A PARTICULAR PURPOSE. + * 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 org.jetbrains.java.decompiler.main; -import java.util.ArrayList; -import java.util.Arrays; -import java.util.List; - import org.jetbrains.java.decompiler.code.CodeConstants; import org.jetbrains.java.decompiler.code.cfg.BasicBlock; import org.jetbrains.java.decompiler.main.ClassesProcessor.ClassNode; @@ -27,295 +24,292 @@ import org.jetbrains.java.decompiler.main.rels.ClassWrapper; import org.jetbrains.java.decompiler.main.rels.MethodWrapper; import org.jetbrains.java.decompiler.modules.decompiler.SecondaryFunctionsHelper; import org.jetbrains.java.decompiler.modules.decompiler.StatEdge; -import org.jetbrains.java.decompiler.modules.decompiler.exps.AssertExprent; -import org.jetbrains.java.decompiler.modules.decompiler.exps.ConstExprent; -import org.jetbrains.java.decompiler.modules.decompiler.exps.ExitExprent; -import org.jetbrains.java.decompiler.modules.decompiler.exps.Exprent; -import org.jetbrains.java.decompiler.modules.decompiler.exps.FieldExprent; -import org.jetbrains.java.decompiler.modules.decompiler.exps.FunctionExprent; -import org.jetbrains.java.decompiler.modules.decompiler.exps.InvocationExprent; -import org.jetbrains.java.decompiler.modules.decompiler.exps.NewExprent; -import org.jetbrains.java.decompiler.modules.decompiler.stats.BasicBlockStatement; -import org.jetbrains.java.decompiler.modules.decompiler.stats.IfStatement; -import org.jetbrains.java.decompiler.modules.decompiler.stats.RootStatement; -import org.jetbrains.java.decompiler.modules.decompiler.stats.SequenceStatement; -import org.jetbrains.java.decompiler.modules.decompiler.stats.Statement; +import org.jetbrains.java.decompiler.modules.decompiler.exps.*; +import org.jetbrains.java.decompiler.modules.decompiler.stats.*; import org.jetbrains.java.decompiler.struct.StructField; import org.jetbrains.java.decompiler.struct.gen.FieldDescriptor; import org.jetbrains.java.decompiler.struct.gen.VarType; import org.jetbrains.java.decompiler.util.InterpreterUtil; +import java.util.ArrayList; +import java.util.Arrays; +import java.util.List; + public class AssertProcessor { - - private static final VarType CLASS_ASSERTION_ERROR = new VarType(CodeConstants.TYPE_OBJECT, 0, "java/lang/AssertionError"); - - public static void buildAssertions(ClassNode node) { - - ClassWrapper wrapper = node.wrapper; - - StructField field = findAssertionField(node); - - if(field != null) { - - String key = InterpreterUtil.makeUniqueKey(field.getName(), field.getDescriptor()); - - boolean res = false; - - for(MethodWrapper meth : wrapper.getMethods()) { - RootStatement root = meth.root; - if(root != null) { - res |= replaceAssertions(root, wrapper.getClassStruct().qualifiedName, key); - } - } - - if(res) { - // hide the helper field - wrapper.getHideMembers().add(key); - } - } - - } - - private static StructField findAssertionField(ClassNode node) { - - ClassWrapper wrapper = node.wrapper; - - boolean nosynthflag = DecompilerContext.getOption(IFernflowerPreferences.SYNTHETIC_NOT_SET); - - for(StructField fd: wrapper.getClassStruct().getFields()) { - - String keyField = InterpreterUtil.makeUniqueKey(fd.getName(), fd.getDescriptor()); - - // initializer exists - if(wrapper.getStaticFieldInitializers().containsKey(keyField)) { - - int flags = fd.access_flags; - boolean isSynthetic = (flags & CodeConstants.ACC_SYNTHETIC) != 0 || fd.getAttributes().containsKey("Synthetic"); - - // access flags set - if((flags & CodeConstants.ACC_STATIC) != 0 && (flags & CodeConstants.ACC_FINAL) != 0 && - (isSynthetic || nosynthflag)) { - - // field type boolean - FieldDescriptor fdescr = FieldDescriptor.parseDescriptor(fd.getDescriptor()); - if(VarType.VARTYPE_BOOLEAN.equals(fdescr.type)) { - - Exprent initializer = wrapper.getStaticFieldInitializers().getWithKey(keyField); - if(initializer.type == Exprent.EXPRENT_FUNCTION) { - FunctionExprent fexpr = (FunctionExprent)initializer; - - if(fexpr.getFunctype() == FunctionExprent.FUNCTION_BOOLNOT && - fexpr.getLstOperands().get(0).type == Exprent.EXPRENT_INVOCATION) { - - InvocationExprent invexpr = (InvocationExprent)fexpr.getLstOperands().get(0); - - if(invexpr.getInstance() != null && invexpr.getInstance().type == Exprent.EXPRENT_CONST && "desiredAssertionStatus".equals(invexpr.getName()) - && "java/lang/Class".equals(invexpr.getClassname()) && invexpr.getLstParameters().isEmpty()) { - - ConstExprent cexpr = (ConstExprent)invexpr.getInstance(); - if(VarType.VARTYPE_CLASS.equals(cexpr.getConsttype())) { - - ClassNode nd = node; - while(nd != null) { - if(nd.wrapper.getClassStruct().qualifiedName.equals(cexpr.getValue())) { - break; - } - nd = nd.parent; - } - - if(nd != null) { // found enclosing class with the same name - return fd; - } - } - } - } - } - } - } - } - } - - - return null; - } - - - private static boolean replaceAssertions(Statement statement, String classname, String key) { - - boolean res = false; - - for(Statement st : statement.getStats()) { - res |= replaceAssertions(st, classname, key); - } - - boolean replaced = true; - while(replaced) { - replaced = false; - - for(Statement st : statement.getStats()) { - if(st.type == Statement.TYPE_IF) { - if(replaceAssertion(statement, (IfStatement)st, classname, key)) { - replaced = true; - break; - } - } - } - - res |= replaced; - } - - return res; - } - - private static boolean replaceAssertion(Statement parent, IfStatement stat, String classname, String key) { - - Statement ifstat = stat.getIfstat(); - InvocationExprent throwError = isAssertionError(ifstat); - - if(throwError == null) { - return false; - } - - Object[] exprres = getAssertionExprent(stat.getHeadexprent().getCondition().copy(), classname, key); - if(!(Boolean)exprres[1]) { - return false; - } - - List<Exprent> lstParams = new ArrayList<Exprent>(); - - Exprent ascond = null, retcond = null; - if(exprres[0] != null) { - ascond = new FunctionExprent(FunctionExprent.FUNCTION_BOOLNOT, - Arrays.asList(new Exprent[]{(Exprent)exprres[0]})); - retcond = SecondaryFunctionsHelper.propagateBoolNot(ascond); - } - - lstParams.add(retcond==null?ascond:retcond); - if(!throwError.getLstParameters().isEmpty()) { - lstParams.add(throwError.getLstParameters().get(0)); - } - - AssertExprent asexpr = new AssertExprent(lstParams); - - Statement newstat = new BasicBlockStatement(new BasicBlock( - DecompilerContext.getCountercontainer().getCounterAndIncrement(CounterContainer.STATEMENT_COUNTER))); - newstat.setExprents(Arrays.asList(new Exprent[] {asexpr})); - - Statement first = stat.getFirst(); - - if(stat.iftype == IfStatement.IFTYPE_IFELSE || (first.getExprents() != null && - !first.getExprents().isEmpty())) { - - first.removeSuccessor(stat.getIfEdge()); - first.removeSuccessor(stat.getElseEdge()); - - List<Statement> lstStatements = new ArrayList<Statement>(); - if(first.getExprents() != null && !first.getExprents().isEmpty()) { - lstStatements.add(first); - } - lstStatements.add(newstat); - if(stat.iftype == IfStatement.IFTYPE_IFELSE) { - lstStatements.add(stat.getElsestat()); - } - - SequenceStatement sequence = new SequenceStatement(lstStatements); - sequence.setAllParent(); - - for(int i=0;i<sequence.getStats().size()-1;i++) { - sequence.getStats().get(i).addSuccessor(new StatEdge(StatEdge.TYPE_REGULAR, - sequence.getStats().get(i), sequence.getStats().get(i+1))); - } - - if(stat.iftype == IfStatement.IFTYPE_IFELSE) { - Statement ifelse = stat.getElsestat(); - - List<StatEdge> lstSuccs = ifelse.getAllSuccessorEdges(); - if(!lstSuccs.isEmpty()) { - StatEdge endedge = lstSuccs.get(0); - if(endedge.closure == stat) { - sequence.addLabeledEdge(endedge); - } - } - } - - newstat = sequence; - } - - newstat.getVarDefinitions().addAll(stat.getVarDefinitions()); - parent.replaceStatement(stat, newstat); - - return true; - } - - private static InvocationExprent isAssertionError(Statement stat) { - - if(stat == null || stat.getExprents() == null || stat.getExprents().size() !=1) { - return null; - } - - Exprent expr = stat.getExprents().get(0); - - if(expr.type == Exprent.EXPRENT_EXIT) { - ExitExprent exexpr = (ExitExprent)expr; - if(exexpr.getExittype() == ExitExprent.EXIT_THROW && exexpr.getValue().type == Exprent.EXPRENT_NEW) { - NewExprent nexpr = (NewExprent)exexpr.getValue(); - if(CLASS_ASSERTION_ERROR.equals(nexpr.getNewtype()) && nexpr.getConstructor() != null) { - return nexpr.getConstructor(); - } - } - } - - return null; - } - - private static Object[] getAssertionExprent(Exprent exprent, String classname, String key) { - - if(exprent.type == Exprent.EXPRENT_FUNCTION) { - FunctionExprent fexpr = (FunctionExprent)exprent; - if(fexpr.getFunctype() == FunctionExprent.FUNCTION_CADD) { - - for(int i=0;i<2;i++) { - Exprent param = fexpr.getLstOperands().get(i); - - if(isAssertionField(param, classname, key)) { - return new Object[] {fexpr.getLstOperands().get(1-i), true}; - } - } - - for(int i=0;i<2;i++) { - Exprent param = fexpr.getLstOperands().get(i); - - Object[] res = getAssertionExprent(param, classname, key); - if((Boolean)res[1]) { - if(param != res[0]) { - fexpr.getLstOperands().set(i, (Exprent)res[0]); - } - return new Object[] {fexpr, true}; - } - } - } else if(isAssertionField(fexpr, classname, key)) { - // assert false; - return new Object[] {null, true}; - } - } - - return new Object[] {exprent, false}; - } - - private static boolean isAssertionField(Exprent exprent, String classname, String key) { - - if(exprent.type == Exprent.EXPRENT_FUNCTION) { - FunctionExprent fparam = (FunctionExprent)exprent; - if(fparam.getFunctype() == FunctionExprent.FUNCTION_BOOLNOT && - fparam.getLstOperands().get(0).type == Exprent.EXPRENT_FIELD) { - FieldExprent fdparam = (FieldExprent)fparam.getLstOperands().get(0); - if(classname.equals(fdparam.getClassname()) - && key.equals(InterpreterUtil.makeUniqueKey(fdparam.getName(), fdparam.getDescriptor().descriptorString))) { - return true; - } - } - } - - return false; - } + + private static final VarType CLASS_ASSERTION_ERROR = new VarType(CodeConstants.TYPE_OBJECT, 0, "java/lang/AssertionError"); + + public static void buildAssertions(ClassNode node) { + + ClassWrapper wrapper = node.wrapper; + + StructField field = findAssertionField(node); + + if (field != null) { + + String key = InterpreterUtil.makeUniqueKey(field.getName(), field.getDescriptor()); + + boolean res = false; + + for (MethodWrapper meth : wrapper.getMethods()) { + RootStatement root = meth.root; + if (root != null) { + res |= replaceAssertions(root, wrapper.getClassStruct().qualifiedName, key); + } + } + + if (res) { + // hide the helper field + wrapper.getHideMembers().add(key); + } + } + } + + private static StructField findAssertionField(ClassNode node) { + + ClassWrapper wrapper = node.wrapper; + + boolean nosynthflag = DecompilerContext.getOption(IFernflowerPreferences.SYNTHETIC_NOT_SET); + + for (StructField fd : wrapper.getClassStruct().getFields()) { + + String keyField = InterpreterUtil.makeUniqueKey(fd.getName(), fd.getDescriptor()); + + // initializer exists + if (wrapper.getStaticFieldInitializers().containsKey(keyField)) { + + int flags = fd.access_flags; + boolean isSynthetic = (flags & CodeConstants.ACC_SYNTHETIC) != 0 || fd.getAttributes().containsKey("Synthetic"); + + // access flags set + if ((flags & CodeConstants.ACC_STATIC) != 0 && (flags & CodeConstants.ACC_FINAL) != 0 && + (isSynthetic || nosynthflag)) { + + // field type boolean + FieldDescriptor fdescr = FieldDescriptor.parseDescriptor(fd.getDescriptor()); + if (VarType.VARTYPE_BOOLEAN.equals(fdescr.type)) { + + Exprent initializer = wrapper.getStaticFieldInitializers().getWithKey(keyField); + if (initializer.type == Exprent.EXPRENT_FUNCTION) { + FunctionExprent fexpr = (FunctionExprent)initializer; + + if (fexpr.getFunctype() == FunctionExprent.FUNCTION_BOOLNOT && + fexpr.getLstOperands().get(0).type == Exprent.EXPRENT_INVOCATION) { + + InvocationExprent invexpr = (InvocationExprent)fexpr.getLstOperands().get(0); + + if (invexpr.getInstance() != null && + invexpr.getInstance().type == Exprent.EXPRENT_CONST && + "desiredAssertionStatus".equals(invexpr.getName()) + && + "java/lang/Class".equals(invexpr.getClassname()) && + invexpr.getLstParameters().isEmpty()) { + + ConstExprent cexpr = (ConstExprent)invexpr.getInstance(); + if (VarType.VARTYPE_CLASS.equals(cexpr.getConsttype())) { + + ClassNode nd = node; + while (nd != null) { + if (nd.wrapper.getClassStruct().qualifiedName.equals(cexpr.getValue())) { + break; + } + nd = nd.parent; + } + + if (nd != null) { // found enclosing class with the same name + return fd; + } + } + } + } + } + } + } + } + } + + + return null; + } + + + private static boolean replaceAssertions(Statement statement, String classname, String key) { + + boolean res = false; + + for (Statement st : statement.getStats()) { + res |= replaceAssertions(st, classname, key); + } + + boolean replaced = true; + while (replaced) { + replaced = false; + + for (Statement st : statement.getStats()) { + if (st.type == Statement.TYPE_IF) { + if (replaceAssertion(statement, (IfStatement)st, classname, key)) { + replaced = true; + break; + } + } + } + + res |= replaced; + } + + return res; + } + + private static boolean replaceAssertion(Statement parent, IfStatement stat, String classname, String key) { + + Statement ifstat = stat.getIfstat(); + InvocationExprent throwError = isAssertionError(ifstat); + + if (throwError == null) { + return false; + } + + Object[] exprres = getAssertionExprent(stat.getHeadexprent().getCondition().copy(), classname, key); + if (!(Boolean)exprres[1]) { + return false; + } + + List<Exprent> lstParams = new ArrayList<Exprent>(); + + Exprent ascond = null, retcond = null; + if (exprres[0] != null) { + ascond = new FunctionExprent(FunctionExprent.FUNCTION_BOOLNOT, + Arrays.asList(new Exprent[]{(Exprent)exprres[0]})); + retcond = SecondaryFunctionsHelper.propagateBoolNot(ascond); + } + + lstParams.add(retcond == null ? ascond : retcond); + if (!throwError.getLstParameters().isEmpty()) { + lstParams.add(throwError.getLstParameters().get(0)); + } + + AssertExprent asexpr = new AssertExprent(lstParams); + + Statement newstat = new BasicBlockStatement(new BasicBlock( + DecompilerContext.getCountercontainer().getCounterAndIncrement(CounterContainer.STATEMENT_COUNTER))); + newstat.setExprents(Arrays.asList(new Exprent[]{asexpr})); + + Statement first = stat.getFirst(); + + if (stat.iftype == IfStatement.IFTYPE_IFELSE || (first.getExprents() != null && + !first.getExprents().isEmpty())) { + + first.removeSuccessor(stat.getIfEdge()); + first.removeSuccessor(stat.getElseEdge()); + + List<Statement> lstStatements = new ArrayList<Statement>(); + if (first.getExprents() != null && !first.getExprents().isEmpty()) { + lstStatements.add(first); + } + lstStatements.add(newstat); + if (stat.iftype == IfStatement.IFTYPE_IFELSE) { + lstStatements.add(stat.getElsestat()); + } + + SequenceStatement sequence = new SequenceStatement(lstStatements); + sequence.setAllParent(); + + for (int i = 0; i < sequence.getStats().size() - 1; i++) { + sequence.getStats().get(i).addSuccessor(new StatEdge(StatEdge.TYPE_REGULAR, + sequence.getStats().get(i), sequence.getStats().get(i + 1))); + } + + if (stat.iftype == IfStatement.IFTYPE_IFELSE) { + Statement ifelse = stat.getElsestat(); + + List<StatEdge> lstSuccs = ifelse.getAllSuccessorEdges(); + if (!lstSuccs.isEmpty()) { + StatEdge endedge = lstSuccs.get(0); + if (endedge.closure == stat) { + sequence.addLabeledEdge(endedge); + } + } + } + + newstat = sequence; + } + + newstat.getVarDefinitions().addAll(stat.getVarDefinitions()); + parent.replaceStatement(stat, newstat); + + return true; + } + + private static InvocationExprent isAssertionError(Statement stat) { + + if (stat == null || stat.getExprents() == null || stat.getExprents().size() != 1) { + return null; + } + + Exprent expr = stat.getExprents().get(0); + + if (expr.type == Exprent.EXPRENT_EXIT) { + ExitExprent exexpr = (ExitExprent)expr; + if (exexpr.getExittype() == ExitExprent.EXIT_THROW && exexpr.getValue().type == Exprent.EXPRENT_NEW) { + NewExprent nexpr = (NewExprent)exexpr.getValue(); + if (CLASS_ASSERTION_ERROR.equals(nexpr.getNewtype()) && nexpr.getConstructor() != null) { + return nexpr.getConstructor(); + } + } + } + + return null; + } + + private static Object[] getAssertionExprent(Exprent exprent, String classname, String key) { + + if (exprent.type == Exprent.EXPRENT_FUNCTION) { + FunctionExprent fexpr = (FunctionExprent)exprent; + if (fexpr.getFunctype() == FunctionExprent.FUNCTION_CADD) { + + for (int i = 0; i < 2; i++) { + Exprent param = fexpr.getLstOperands().get(i); + + if (isAssertionField(param, classname, key)) { + return new Object[]{fexpr.getLstOperands().get(1 - i), true}; + } + } + + for (int i = 0; i < 2; i++) { + Exprent param = fexpr.getLstOperands().get(i); + + Object[] res = getAssertionExprent(param, classname, key); + if ((Boolean)res[1]) { + if (param != res[0]) { + fexpr.getLstOperands().set(i, (Exprent)res[0]); + } + return new Object[]{fexpr, true}; + } + } + } + else if (isAssertionField(fexpr, classname, key)) { + // assert false; + return new Object[]{null, true}; + } + } + + return new Object[]{exprent, false}; + } + + private static boolean isAssertionField(Exprent exprent, String classname, String key) { + + if (exprent.type == Exprent.EXPRENT_FUNCTION) { + FunctionExprent fparam = (FunctionExprent)exprent; + if (fparam.getFunctype() == FunctionExprent.FUNCTION_BOOLNOT && + fparam.getLstOperands().get(0).type == Exprent.EXPRENT_FIELD) { + FieldExprent fdparam = (FieldExprent)fparam.getLstOperands().get(0); + if (classname.equals(fdparam.getClassname()) + && key.equals(InterpreterUtil.makeUniqueKey(fdparam.getName(), fdparam.getDescriptor().descriptorString))) { + return true; + } + } + } + + return false; + } } |