private static void generateLocalVariableTable(
@NotNull MethodVisitor mv,
@NotNull JvmMethodSignature jvmMethodSignature,
@NotNull FunctionDescriptor functionDescriptor,
@Nullable Type thisType,
@NotNull Label methodBegin,
@NotNull Label methodEnd,
@NotNull OwnerKind ownerKind) {
Iterator<ValueParameterDescriptor> valueParameters =
functionDescriptor.getValueParameters().iterator();
List<JvmMethodParameterSignature> params = jvmMethodSignature.getValueParameters();
int shift = 0;
boolean isStatic = AsmUtil.isStaticMethod(ownerKind, functionDescriptor);
if (!isStatic) {
// add this
if (thisType != null) {
mv.visitLocalVariable(
"this", thisType.getDescriptor(), null, methodBegin, methodEnd, shift);
} else {
// TODO: provide thisType for callable reference
}
shift++;
}
for (int i = 0; i < params.size(); i++) {
JvmMethodParameterSignature param = params.get(i);
JvmMethodParameterKind kind = param.getKind();
String parameterName;
if (kind == JvmMethodParameterKind.VALUE) {
ValueParameterDescriptor parameter = valueParameters.next();
parameterName = parameter.getName().asString();
} else {
String lowercaseKind = kind.name().toLowerCase();
parameterName = needIndexForVar(kind) ? "$" + lowercaseKind + "$" + i : "$" + lowercaseKind;
}
Type type = param.getAsmType();
mv.visitLocalVariable(
parameterName, type.getDescriptor(), null, methodBegin, methodEnd, shift);
shift += type.getSize();
}
}
private static void loadExplicitArgumentsOnStack(
@NotNull Type ownerType,
boolean isStatic,
@NotNull JvmMethodSignature signature,
@NotNull CallGenerator callGenerator) {
int var = 0;
if (!isStatic) {
callGenerator.putValueIfNeeded(ownerType, StackValue.local(var, ownerType));
var += ownerType.getSize();
}
for (JvmMethodParameterSignature parameterSignature : signature.getValueParameters()) {
if (parameterSignature.getKind() != JvmMethodParameterKind.VALUE) {
Type type = parameterSignature.getAsmType();
callGenerator.putValueIfNeeded(type, StackValue.local(var, type));
var += type.getSize();
}
}
}
private static void generateDelegateToMethodBody(
boolean isStatic,
@NotNull MethodVisitor mv,
@NotNull Method asmMethod,
@NotNull String classToDelegateTo) {
InstructionAdapter iv = new InstructionAdapter(mv);
Type[] argTypes = asmMethod.getArgumentTypes();
// The first line of some package file is written to the line number attribute of a static
// delegate to allow to 'step into' it
// This is similar to what javac does with bridge methods
Label label = new Label();
iv.visitLabel(label);
iv.visitLineNumber(1, label);
int k = isStatic ? 0 : 1;
for (Type argType : argTypes) {
iv.load(k, argType);
k += argType.getSize();
}
iv.invokestatic(classToDelegateTo, asmMethod.getName(), asmMethod.getDescriptor(), false);
iv.areturn(asmMethod.getReturnType());
}
private static void genDefaultSuperCallCheckIfNeeded(
@NotNull InstructionAdapter iv, @NotNull Method defaultMethod) {
String defaultMethodName = defaultMethod.getName();
if ("<init>".equals(defaultMethodName)) {
return;
}
Label end = new Label();
int handleIndex =
(Type.getArgumentsAndReturnSizes(defaultMethod.getDescriptor()) >> 2)
- 2; /*-1 for this, and -1 for handle*/
iv.load(handleIndex, OBJECT_TYPE);
iv.ifnull(end);
AsmUtil.genThrow(
iv,
"java/lang/UnsupportedOperationException",
"Super calls with default arguments not supported in this target, function: "
+ StringsKt.substringBeforeLast(
defaultMethodName, JvmAbi.DEFAULT_PARAMS_IMPL_SUFFIX, defaultMethodName));
iv.visitLabel(end);
}
public static void generateMethodBody(
@NotNull MethodVisitor mv,
@NotNull FunctionDescriptor functionDescriptor,
@NotNull MethodContext context,
@NotNull JvmMethodSignature signature,
@NotNull FunctionGenerationStrategy strategy,
@NotNull MemberCodegen<?> parentCodegen) {
mv.visitCode();
Label methodBegin = new Label();
mv.visitLabel(methodBegin);
JetTypeMapper typeMapper = parentCodegen.typeMapper;
if (BuiltinSpecialBridgesUtil.shouldHaveTypeSafeBarrier(
functionDescriptor, getSignatureMapper(typeMapper))) {
generateTypeCheckBarrierIfNeeded(
new InstructionAdapter(mv),
functionDescriptor,
signature.getReturnType(),
/* delegateParameterType = */ null);
}
Label methodEnd;
int functionFakeIndex = -1;
int lambdaFakeIndex = -1;
if (context.getParentContext() instanceof MultifileClassFacadeContext) {
generateFacadeDelegateMethodBody(
mv, signature.getAsmMethod(), (MultifileClassFacadeContext) context.getParentContext());
methodEnd = new Label();
} else {
FrameMap frameMap =
createFrameMap(
parentCodegen.state,
functionDescriptor,
signature,
isStaticMethod(context.getContextKind(), functionDescriptor));
if (context.isInlineMethodContext()) {
functionFakeIndex = frameMap.enterTemp(Type.INT_TYPE);
}
if (context instanceof InlineLambdaContext) {
lambdaFakeIndex = frameMap.enterTemp(Type.INT_TYPE);
}
Label methodEntry = new Label();
mv.visitLabel(methodEntry);
context.setMethodStartLabel(methodEntry);
if (!JetTypeMapper.isAccessor(functionDescriptor)) {
genNotNullAssertionsForParameters(
new InstructionAdapter(mv), parentCodegen.state, functionDescriptor, frameMap);
}
methodEnd = new Label();
context.setMethodEndLabel(methodEnd);
strategy.generateBody(mv, frameMap, signature, context, parentCodegen);
}
mv.visitLabel(methodEnd);
Type thisType = getThisTypeForFunction(functionDescriptor, context, typeMapper);
generateLocalVariableTable(
mv,
signature,
functionDescriptor,
thisType,
methodBegin,
methodEnd,
context.getContextKind());
if (context.isInlineMethodContext() && functionFakeIndex != -1) {
mv.visitLocalVariable(
JvmAbi.LOCAL_VARIABLE_NAME_PREFIX_INLINE_FUNCTION
+ functionDescriptor.getName().asString(),
Type.INT_TYPE.getDescriptor(),
null,
methodBegin,
methodEnd,
functionFakeIndex);
}
if (context instanceof InlineLambdaContext && thisType != null && lambdaFakeIndex != -1) {
String name = thisType.getClassName();
int indexOfLambdaOrdinal = name.lastIndexOf("$");
if (indexOfLambdaOrdinal > 0) {
int lambdaOrdinal = Integer.parseInt(name.substring(indexOfLambdaOrdinal + 1));
mv.visitLocalVariable(
JvmAbi.LOCAL_VARIABLE_NAME_PREFIX_INLINE_ARGUMENT + lambdaOrdinal,
Type.INT_TYPE.getDescriptor(),
null,
methodBegin,
methodEnd,
lambdaFakeIndex);
}
}
}
public void generateMethod(
@NotNull JvmDeclarationOrigin origin,
@NotNull FunctionDescriptor functionDescriptor,
@NotNull MethodContext methodContext,
@NotNull FunctionGenerationStrategy strategy) {
OwnerKind contextKind = methodContext.getContextKind();
if (isInterface(functionDescriptor.getContainingDeclaration())
&& functionDescriptor.getVisibility() == Visibilities.PRIVATE
&& contextKind != OwnerKind.DEFAULT_IMPLS) {
return;
}
JvmMethodSignature jvmSignature = typeMapper.mapSignature(functionDescriptor, contextKind);
Method asmMethod = jvmSignature.getAsmMethod();
int flags = getMethodAsmFlags(functionDescriptor, contextKind);
boolean isNative = NativeKt.hasNativeAnnotation(functionDescriptor);
if (isNative && owner instanceof MultifileClassFacadeContext) {
// Native methods are only defined in facades and do not need package part implementations
return;
}
MethodVisitor mv =
v.newMethod(
origin,
flags,
asmMethod.getName(),
asmMethod.getDescriptor(),
jvmSignature.getGenericsSignature(),
getThrownExceptions(functionDescriptor, typeMapper));
if (CodegenContextUtil.isImplClassOwner(owner)) {
v.getSerializationBindings().put(METHOD_FOR_FUNCTION, functionDescriptor, asmMethod);
}
generateMethodAnnotations(functionDescriptor, asmMethod, mv);
generateParameterAnnotations(
functionDescriptor, mv, typeMapper.mapSignature(functionDescriptor));
generateBridges(functionDescriptor);
boolean staticInCompanionObject =
AnnotationUtilKt.isPlatformStaticInCompanionObject(functionDescriptor);
if (staticInCompanionObject) {
ImplementationBodyCodegen parentBodyCodegen =
(ImplementationBodyCodegen) memberCodegen.getParentCodegen();
parentBodyCodegen.addAdditionalTask(
new JvmStaticGenerator(functionDescriptor, origin, state));
}
if (state.getClassBuilderMode() == ClassBuilderMode.LIGHT_CLASSES
|| isAbstractMethod(functionDescriptor, contextKind)) {
generateLocalVariableTable(
mv,
jvmSignature,
functionDescriptor,
getThisTypeForFunction(functionDescriptor, methodContext, typeMapper),
new Label(),
new Label(),
contextKind);
mv.visitEnd();
return;
}
if (!isNative) {
generateMethodBody(
mv, functionDescriptor, methodContext, jvmSignature, strategy, memberCodegen);
} else if (staticInCompanionObject) {
// native @JvmStatic foo() in companion object should delegate to the static native function
// moved to the outer class
mv.visitCode();
FunctionDescriptor staticFunctionDescriptor =
JvmStaticGenerator.createStaticFunctionDescriptor(functionDescriptor);
JvmMethodSignature jvmMethodSignature =
typeMapper.mapSignature(
memberCodegen.getContext().accessibleDescriptor(staticFunctionDescriptor, null));
Type owningType =
typeMapper.mapClass(
(ClassifierDescriptor) staticFunctionDescriptor.getContainingDeclaration());
generateDelegateToMethodBody(
false, mv, jvmMethodSignature.getAsmMethod(), owningType.getInternalName());
}
endVisit(mv, null, origin.getElement());
}