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Code Issues 9 Pull Requests Releases Activity

IDEA-127301: handling of static method references

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master
Stiver 10 years ago
parent 6606a474bf
commit 7f116b6eb5
4 changed files with 215 additions and 185 deletions
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  1. 231
      src/de/fernflower/main/ClassWriter.java
  2. 17
      src/de/fernflower/main/ClassesProcessor.java
  3. 122
      src/de/fernflower/main/rels/LambdaProcessor.java
  4. 30
      src/de/fernflower/main/rels/NestedClassProcessor.java

231
src/de/fernflower/main/ClassWriter.java
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@ -134,63 +134,74 @@ public class ClassWriter {
DecompilerContext.getLogger().startWriteClass(node.simpleName);
// lambda method
StructMethod mt = cl.getMethod(node.lambda_information.content_method_key);
MethodWrapper meth = wrapper.getMethodWrapper(mt.getName(), mt.getDescriptor());
MethodDescriptor md_content = MethodDescriptor.parseDescriptor(node.lambda_information.content_method_descriptor);
MethodDescriptor md_lambda = MethodDescriptor.parseDescriptor(node.lambda_information.method_descriptor);
if(!lambda_to_anonymous) { // lambda parameters '() ->'
StringBuilder buff = new StringBuilder("(");
boolean firstpar = true;
int index = 1;
int start_index = md_content.params.length - md_lambda.params.length;
for(int i=0;i<md_content.params.length;i++) {
if(i >= start_index) {
if(node.lambda_information.is_method_reference) {
if(!firstpar) {
buff.append(", ");
}
String parname = meth.varproc.getVarName(new VarVersionPaar(index, 0));
buff.append(parname==null ? "param"+index : parname); // null iff decompiled with errors
firstpar = false;
}
index+=md_content.params[i].stack_size;
}
buff.append(") ->");
writer.write(ExprProcessor.getCastTypeName(new VarType(node.lambda_information.content_class_name, false)));
writer.write("::");
writer.write(node.lambda_information.content_method_name);
writer.flush();
writer.write(buff.toString());
}
StringWriter strwriter = new StringWriter();
BufferedWriter bufstrwriter = new BufferedWriter(strwriter);
if(lambda_to_anonymous) {
methodLambdaToJava(node, node_content, mt, bufstrwriter, indent+1, false);
} else {
methodLambdaToJava(node, node_content, mt, bufstrwriter, indent, true);
}
bufstrwriter.flush();
// closing up class definition
writer.write(" {");
writer.write(DecompilerContext.getNewLineSeparator());
writer.write(strwriter.toString());
writer.write(InterpreterUtil.getIndentString(indent));
writer.write("}");
writer.flush();
// lambda method
StructMethod mt = cl.getMethod(node.lambda_information.content_method_key);
MethodWrapper meth = wrapper.getMethodWrapper(mt.getName(), mt.getDescriptor());
MethodDescriptor md_content = MethodDescriptor.parseDescriptor(node.lambda_information.content_method_descriptor);
MethodDescriptor md_lambda = MethodDescriptor.parseDescriptor(node.lambda_information.method_descriptor);
if(!lambda_to_anonymous) { // lambda parameters '() ->'
StringBuilder buff = new StringBuilder("(");
boolean firstpar = true;
int index = 1;
int start_index = md_content.params.length - md_lambda.params.length;
for(int i=0;i<md_content.params.length;i++) {
if(i >= start_index) {
if(!firstpar) {
buff.append(", ");
}
String parname = meth.varproc.getVarName(new VarVersionPaar(index, 0));
buff.append(parname==null ? "param"+index : parname); // null iff decompiled with errors
firstpar = false;
}
index+=md_content.params[i].stack_size;
}
buff.append(") ->");
writer.write(buff.toString());
}
StringWriter strwriter = new StringWriter();
BufferedWriter bufstrwriter = new BufferedWriter(strwriter);
if(lambda_to_anonymous) {
methodLambdaToJava(node, node_content, mt, bufstrwriter, indent+1, false);
} else {
methodLambdaToJava(node, node_content, mt, bufstrwriter, indent, true);
}
bufstrwriter.flush();
// closing up class definition
writer.write(" {");
writer.write(DecompilerContext.getNewLineSeparator());
writer.write(strwriter.toString());
writer.write(InterpreterUtil.getIndentString(indent));
writer.write("}");
writer.flush();
}
DecompilerContext.setProperty(DecompilerContext.CURRENT_CLASSNODE, nodeold);
@ -345,18 +356,18 @@ public class ClassWriter {
}
}
if(isDeprecated) {
writer.write(indstr);
writer.write("/** @deprecated */");
writer.write(DecompilerContext.getNewLineSeparator());
}
if (isDeprecated) {
writer.write(indstr);
writer.write("/** @deprecated */");
writer.write(DecompilerContext.getNewLineSeparator());
}
// class annotations
List<AnnotationExprent> lstAnn = getAllAnnotations(cl.getAttributes());
for(AnnotationExprent annexpr : lstAnn) {
writer.write(annexpr.toJava(indent));
writer.write(DecompilerContext.getNewLineSeparator());
}
List<AnnotationExprent> lstAnn = getAllAnnotations(cl.getAttributes());
for(AnnotationExprent annexpr : lstAnn) {
writer.write(annexpr.toJava(indent));
writer.write(DecompilerContext.getNewLineSeparator());
}
boolean isSynthetic = (flags & CodeConstants.ACC_SYNTHETIC) != 0 || cl.getAttributes().containsKey("Synthetic");
@ -481,18 +492,18 @@ public class ClassWriter {
boolean isDeprecated = fd.getAttributes().containsKey("Deprecated");
if(isDeprecated) {
writer.write(indstr);
writer.write("/** @deprecated */");
writer.write(DecompilerContext.getNewLineSeparator());
}
if (isDeprecated) {
writer.write(indstr);
writer.write("/** @deprecated */");
writer.write(DecompilerContext.getNewLineSeparator());
}
// field annotations
List<AnnotationExprent> lstAnn = getAllAnnotations(fd.getAttributes());
for(AnnotationExprent annexpr : lstAnn) {
writer.write(annexpr.toJava(indent));
writer.write(DecompilerContext.getNewLineSeparator());
}
List<AnnotationExprent> lstAnn = getAllAnnotations(fd.getAttributes());
for(AnnotationExprent annexpr : lstAnn) {
writer.write(annexpr.toJava(indent));
writer.write(DecompilerContext.getNewLineSeparator());
}
boolean isSynthetic = (flags & CodeConstants.ACC_SYNTHETIC) != 0 || fd.getAttributes().containsKey("Synthetic");
boolean isEnum = DecompilerContext.getOption(IFernflowerPreferences.DECOMPILE_ENUM) && (flags & CodeConstants.ACC_ENUM) != 0;
@ -674,7 +685,7 @@ public class ClassWriter {
boolean isInterface = (cl.access_flags & CodeConstants.ACC_INTERFACE) != 0;
boolean isAnnotation = (cl.access_flags & CodeConstants.ACC_ANNOTATION) != 0;
boolean isEnum = (cl.access_flags & CodeConstants.ACC_ENUM) != 0 && DecompilerContext.getOption(IFernflowerPreferences.DECOMPILE_ENUM);
boolean isEnum = (cl.access_flags & CodeConstants.ACC_ENUM) != 0 && DecompilerContext.getOption(IFernflowerPreferences.DECOMPILE_ENUM);
boolean isDeprecated = mt.getAttributes().containsKey("Deprecated");
String indstr = InterpreterUtil.getIndentString(indent);
@ -705,18 +716,18 @@ public class ClassWriter {
}
}
if(isDeprecated) {
writer.write(indstr);
writer.write("/** @deprecated */");
writer.write(DecompilerContext.getNewLineSeparator());
}
if (isDeprecated) {
writer.write(indstr);
writer.write("/** @deprecated */");
writer.write(DecompilerContext.getNewLineSeparator());
}
// method annotations
List<AnnotationExprent> lstAnn = getAllAnnotations(mt.getAttributes());
for(AnnotationExprent annexpr : lstAnn) {
bufstrwriter.write(annexpr.toJava(indent));
bufstrwriter.write(DecompilerContext.getNewLineSeparator());
}
// method annotations
List<AnnotationExprent> lstAnn = getAllAnnotations(mt.getAttributes());
for(AnnotationExprent annexpr : lstAnn) {
bufstrwriter.write(annexpr.toJava(indent));
bufstrwriter.write(DecompilerContext.getNewLineSeparator());
}
boolean isSynthetic = (flags & CodeConstants.ACC_SYNTHETIC) != 0 || mt.getAttributes().containsKey("Synthetic");
boolean isBridge = (flags & CodeConstants.ACC_BRIDGE) != 0;
@ -747,19 +758,19 @@ public class ClassWriter {
bufstrwriter.write("default ");
}
String name = mt.getName();
if("<init>".equals(name)) {
if(node.type == ClassNode.CLASS_ANONYMOUS) {
name = "";
dinit = true;
} else {
name = node.simpleName;
init = true;
}
} else if("<clinit>".equals(name)) {
name = "";
clinit = true;
}
String name = mt.getName();
if ("<init>".equals(name)) {
if (node.type == ClassNode.CLASS_ANONYMOUS) {
name = "";
dinit = true;
} else {
name = node.simpleName;
init = true;
}
} else if ("<clinit>".equals(name)) {
name = "";
clinit = true;
}
GenericMethodDescriptor descriptor = null;
if(DecompilerContext.getOption(IFernflowerPreferences.DECOMPILE_GENERIC_SIGNATURES)) {
@ -793,14 +804,14 @@ public class ClassWriter {
bufstrwriter.write(descriptor.fparameters.get(i));
List<GenericType> lstBounds = descriptor.fbounds.get(i);
if (lstBounds.size() > 1 || !"java/lang/Object".equals(lstBounds.get(0).value)) {
bufstrwriter.write(" extends ");
bufstrwriter.write(GenericMain.getGenericCastTypeName(lstBounds.get(0)));
if (lstBounds.size() > 1 || !"java/lang/Object".equals(lstBounds.get(0).value)) {
bufstrwriter.write(" extends ");
bufstrwriter.write(GenericMain.getGenericCastTypeName(lstBounds.get(0)));
for(int j=1;j<lstBounds.size();j++) {
bufstrwriter.write(" & " + GenericMain.getGenericCastTypeName(lstBounds.get(j)));
}
}
for(int j = 1; j < lstBounds.size(); j++) {
bufstrwriter.write(" & " + GenericMain.getGenericCastTypeName(lstBounds.get(j)));
}
}
}
bufstrwriter.write("> ");
}
@ -831,11 +842,11 @@ public class ClassWriter {
}
boolean firstpar = true;
int index = isEnum && init ? 3 : thisvar ? 1 : 0;
int start = isEnum && init && descriptor == null ? 2 : 0;
int params = descriptor == null ? md.params.length : descriptor.params.size();
for(int i=start;i<params;i++) {
if(signFields == null || signFields.get(i) == null) {
int index = isEnum && init ? 3 : thisvar ? 1 : 0;
int start = isEnum && init && descriptor == null ? 2 : 0;
int params = descriptor == null ? md.params.length : descriptor.params.size();
for(int i = start; i < params; i++) {
if (signFields == null || signFields.get(i) == null) {
if(!firstpar) {
bufstrwriter.write(", ");

17
src/de/fernflower/main/ClassesProcessor.java
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@ -41,6 +41,7 @@ import de.fernflower.modules.decompiler.exps.InvocationExprent;
import de.fernflower.modules.decompiler.vars.VarVersionPaar;
import de.fernflower.struct.StructClass;
import de.fernflower.struct.StructContext;
import de.fernflower.struct.StructMethod;
import de.fernflower.struct.attr.StructInnerClassesAttribute;
import de.fernflower.struct.gen.VarType;
import de.fernflower.util.InterpreterUtil;
@ -378,7 +379,7 @@ public class ClassesProcessor {
public LambdaInformation lambda_information;
public ClassNode(String content_method_name, String content_method_descriptor, String lambda_class_name, String lambda_method_name,
public ClassNode(String content_class_name, String content_method_name, String content_method_descriptor, String lambda_class_name, String lambda_method_name,
String lambda_method_descriptor, StructClass classStruct) { // lambda class constructor
this.type = CLASS_LAMBDA;
this.classStruct = classStruct; // 'parent' class containing the static function
@ -389,13 +390,22 @@ public class ClassesProcessor {
lambda_information.method_name = lambda_method_name;
lambda_information.method_descriptor = lambda_method_descriptor;
lambda_information.content_class_name = content_class_name;
lambda_information.content_method_name = content_method_name;
lambda_information.content_method_descriptor = content_method_descriptor;
lambda_information.content_method_key = InterpreterUtil.makeUniqueKey(lambda_information.content_method_name, lambda_information.content_method_descriptor);
anonimousClassType = new VarType(lambda_class_name, true);
lambda_information.is_content_method_static = ((classStruct.getMethod(content_method_name, content_method_descriptor).getAccessFlags() & CodeConstants.ACC_STATIC) != 0);
if(content_class_name != classStruct.qualifiedName) { // method reference. FIXME: class name alone doesn't cover it. Synthetic flag seems to be the only 'reliable' difference.
lambda_information.is_method_reference = true;
lambda_information.is_content_method_static = true; // FIXME: consider argument flag
} else {
StructMethod mt = classStruct.getMethod(content_method_name, content_method_descriptor);
lambda_information.is_method_reference = false;
lambda_information.is_content_method_static = ((mt.getAccessFlags() & CodeConstants.ACC_STATIC) != 0);
}
}
public ClassNode(int type, StructClass classStruct) {
@ -419,10 +429,13 @@ public class ClassesProcessor {
public String method_name;
public String method_descriptor;
public String content_class_name;
public String content_method_name;
public String content_method_descriptor;
public String content_method_key;
public boolean is_method_reference;
public boolean is_content_method_static;
}
}

122
src/de/fernflower/main/rels/LambdaProcessor.java
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@ -50,85 +50,87 @@ public class LambdaProcessor {
}
StructBootstrapMethodsAttribute bootstrap = (StructBootstrapMethodsAttribute)cl.getAttributes().getWithKey(StructGeneralAttribute.ATTRIBUTE_BOOTSTRAP_METHODS);
if(bootstrap != null && bootstrap.getMethodsNumber() > 0) {
Set<Integer> lambda_methods = new HashSet<Integer>();
// find lambda bootstrap constants
for(int i = 0; i < bootstrap.getMethodsNumber(); ++i) {
LinkConstant method_ref = bootstrap.getMethodReference(i); // method handle
if(JAVAC_LAMBDA_CLASS.equals(method_ref.classname) &&
JAVAC_LAMBDA_METHOD.equals(method_ref.elementname) &&
JAVAC_LAMBDA_METHOD_DESCRIPTOR.equals(method_ref.descriptor)) { // check for javac lambda structure. FIXME: extend for Eclipse etc. at some point
lambda_methods.add(i);
}
}
if(bootstrap == null || bootstrap.getMethodsNumber() == 0) {
return false; // no bootstrap constants in pool
}
Set<Integer> lambda_methods = new HashSet<Integer>();
// find lambda bootstrap constants
for(int i = 0; i < bootstrap.getMethodsNumber(); ++i) {
LinkConstant method_ref = bootstrap.getMethodReference(i); // method handle
if(lambda_methods.isEmpty()) {
return false;
if(JAVAC_LAMBDA_CLASS.equals(method_ref.classname) &&
JAVAC_LAMBDA_METHOD.equals(method_ref.elementname) &&
JAVAC_LAMBDA_METHOD_DESCRIPTOR.equals(method_ref.descriptor)) { // check for javac lambda structure. FIXME: extend for Eclipse etc. at some point
lambda_methods.add(i);
}
}
if(lambda_methods.isEmpty()) {
return false; // no lambda bootstrap constant found
}
Map<String, String> mapMethodsLambda = new HashMap<String, String>();
// iterate over code and find invocations of bootstrap methods. Replace them with anonymous classes.
for(StructMethod mt: cl.getMethods()) {
mt.expandData();
Map<String, String> mapMethodsLambda = new HashMap<String, String>();
// iterate over code and find invocations of bootstrap methods. Replace them with anonymous classes.
for(StructMethod mt: cl.getMethods()) {
mt.expandData();
InstructionSequence seq = mt.getInstructionSequence();
if(seq != null && seq.length() > 0) {
int len = seq.length();
InstructionSequence seq = mt.getInstructionSequence();
if(seq != null && seq.length() > 0) {
int len = seq.length();
for(int i = 0; i < len; ++i) {
Instruction instr = seq.getInstr(i);
for(int i = 0; i < len; ++i) {
Instruction instr = seq.getInstr(i);
if(instr.opcode == CodeConstants.opc_invokedynamic) {
LinkConstant invoke_dynamic = cl.getPool().getLinkConstant(instr.getOperand(0));
if(instr.opcode == CodeConstants.opc_invokedynamic) {
LinkConstant invoke_dynamic = cl.getPool().getLinkConstant(instr.getOperand(0));
if(lambda_methods.contains(invoke_dynamic.index1)) { // lambda invocation found
if(lambda_methods.contains(invoke_dynamic.index1)) { // lambda invocation found
List<PooledConstant> bootstrap_arguments = bootstrap.getMethodArguments(invoke_dynamic.index1);
MethodDescriptor md = MethodDescriptor.parseDescriptor(invoke_dynamic.descriptor);
List<PooledConstant> bootstrap_arguments = bootstrap.getMethodArguments(invoke_dynamic.index1);
MethodDescriptor md = MethodDescriptor.parseDescriptor(invoke_dynamic.descriptor);
String lambda_class_name = md.ret.value;
String lambda_method_name = invoke_dynamic.elementname;
String lambda_method_descriptor = ((PrimitiveConstant)bootstrap_arguments.get(2)).getString(); // method type
LinkConstant content_method_handle = (LinkConstant)bootstrap_arguments.get(1);
String lambda_class_name = md.ret.value;
String lambda_method_name = invoke_dynamic.elementname;
String lambda_method_descriptor = ((PrimitiveConstant)bootstrap_arguments.get(2)).getString(); // method type
LinkConstant content_method_handle = (LinkConstant)bootstrap_arguments.get(1);
ClassNode node_lambda = clprocessor.new ClassNode(content_method_handle.elementname, content_method_handle.descriptor, lambda_class_name,
lambda_method_name, lambda_method_descriptor, cl);
node_lambda.simpleName = cl.qualifiedName + "##Lambda_" + invoke_dynamic.index1 + "_" + invoke_dynamic.index2;
node_lambda.enclosingMethod = InterpreterUtil.makeUniqueKey(mt.getName(), mt.getDescriptor());
ClassNode node_lambda = clprocessor.new ClassNode(content_method_handle.classname, content_method_handle.elementname, content_method_handle.descriptor,
lambda_class_name, lambda_method_name, lambda_method_descriptor, cl);
node_lambda.simpleName = cl.qualifiedName + "##Lambda_" + invoke_dynamic.index1 + "_" + invoke_dynamic.index2;
node_lambda.enclosingMethod = InterpreterUtil.makeUniqueKey(mt.getName(), mt.getDescriptor());
node.nested.add(node_lambda);
node_lambda.parent = node;
clprocessor.getMapRootClasses().put(node_lambda.simpleName, node_lambda);
mapMethodsLambda.put(node_lambda.lambda_information.content_method_key, node_lambda.simpleName);
}
node.nested.add(node_lambda);
node_lambda.parent = node;
clprocessor.getMapRootClasses().put(node_lambda.simpleName, node_lambda);
mapMethodsLambda.put(node_lambda.lambda_information.content_method_key, node_lambda.simpleName);
}
}
}
}
// build class hierarchy on lambda
for(ClassNode nd : node.nested) {
if(nd.type == ClassNode.CLASS_LAMBDA) {
String parent_class_name = mapMethodsLambda.get(nd.enclosingMethod);
if(parent_class_name != null) {
ClassNode parent_class = clprocessor.getMapRootClasses().get(parent_class_name);
parent_class.nested.add(nd);
nd.parent = parent_class;
}
mt.releaseResources();
}
// build class hierarchy on lambda
for(ClassNode nd : node.nested) {
if(nd.type == ClassNode.CLASS_LAMBDA) {
String parent_class_name = mapMethodsLambda.get(nd.enclosingMethod);
if(parent_class_name != null) {
ClassNode parent_class = clprocessor.getMapRootClasses().get(parent_class_name);
parent_class.nested.add(nd);
nd.parent = parent_class;
}
}
// FIXME: mixed hierarchy?
}
// FIXME: mixed hierarchy?
return false;
}

30
src/de/fernflower/main/rels/NestedClassProcessor.java
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@ -76,19 +76,19 @@ public class NestedClassProcessor {
checkNotFoundClasses(root, node);
}
int nameless = 0, synthetics = 0;
for(ClassNode child : node.nested) {
// ensure not-empty class name
if((child.type == ClassNode.CLASS_LOCAL || child.type == ClassNode.CLASS_MEMBER) && child.simpleName == null) {
StructClass cl = child.classStruct;
if(((child.access | cl.access_flags) & CodeConstants.ACC_SYNTHETIC) != 0 || cl.getAttributes().containsKey("Synthetic")) {
child.simpleName = "SyntheticClass_" + (++synthetics);
} else {
DecompilerContext.getLogger().writeMessage("Nameless local or member class " + cl.qualifiedName + "!", IFernflowerLogger.WARNING);
child.simpleName = "NamelessClass_" + (++nameless);
}
}
}
int nameless = 0, synthetics = 0;
for(ClassNode child : node.nested) {
// ensure not-empty class name
if ((child.type == ClassNode.CLASS_LOCAL || child.type == ClassNode.CLASS_MEMBER) && child.simpleName == null) {
StructClass cl = child.classStruct;
if (((child.access | cl.access_flags) & CodeConstants.ACC_SYNTHETIC) != 0 || cl.getAttributes().containsKey("Synthetic")) {
child.simpleName = "SyntheticClass_" + (++synthetics);
} else {
DecompilerContext.getLogger().writeMessage("Nameless local or member class " + cl.qualifiedName + "!", IFernflowerLogger.WARNING);
child.simpleName = "NamelessClass_" + (++nameless);
}
}
}
for(ClassNode child : node.nested) {
if(child.type == ClassNode.CLASS_LAMBDA) {
@ -112,6 +112,10 @@ public class NestedClassProcessor {
private void setLambdaVars(ClassNode parent, ClassNode child) {
if(child.lambda_information.is_method_reference) { // method reference, no code and no parameters
return;
}
final MethodWrapper meth = parent.wrapper.getMethods().getWithKey(child.lambda_information.content_method_key);
final MethodWrapper encmeth = parent.wrapper.getMethods().getWithKey(child.enclosingMethod);

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