@Override
public IRubyObject interpret(
Ruby runtime, ThreadContext context, IRubyObject self, Block aBlock) {
// Serialization killed our dynamic scope. We can just create an empty one
// since serialization cannot serialize an eval (which is the only thing
// which is capable of having a non-empty dynamic scope).
if (scope == null) {
scope = DynamicScope.newDynamicScope(staticScope);
}
StaticScope theStaticScope = scope.getStaticScope();
// Each root node has a top-level scope that we need to push
context.preScopedBody(scope);
if (theStaticScope.getModule() == null) {
theStaticScope.setModule(runtime.getObject());
}
try {
return bodyNode.interpret(runtime, context, self, aBlock);
} finally {
context.postScopedBody();
}
}
private Object cache(
ThreadContext context,
DynamicScope currDynScope,
IRubyObject self,
Object[] temp,
Ruby runtime,
Object constant) {
StaticScope staticScope =
(StaticScope) definingScope.retrieve(context, self, currDynScope, temp);
RubyModule object = runtime.getObject();
// SSS FIXME: IRManager objects dont have a static-scope yet, so this hack of looking up the
// module right away
// This IR needs fixing!
constant =
(staticScope == null)
? object.getConstant(constName)
: staticScope.getConstantInner(runtime, constName, object);
if (constant == null) {
constant = UndefinedValue.UNDEFINED;
} else {
// recache
generation = runtime.getConstantInvalidator().getData();
cachedConstant = constant;
}
return constant;
}
public BodyCompiler startFileMethod(
CompilerCallback args, StaticScope scope, ASTInspector inspector) {
MethodBodyCompiler methodCompiler =
new MethodBodyCompiler(this, "__file__", "__file__", inspector, scope, 0);
// allocate the 0 StaticScope slot in the cache
int reservedIndex = cacheCompiler.reserveStaticScope();
assert reservedIndex == 0 : "__file__ scope index was not zero";
methodCompiler.beginMethod(args, scope);
// boxed arg list __file__
SkinnyMethodAdapter method =
new SkinnyMethodAdapter(
getClassVisitor(), ACC_PUBLIC, "__file__", getMethodSignature(4), null, null);
method.start();
// invoke static __file__
method.aload(THIS);
method.aload(THREADCONTEXT_INDEX);
method.aload(SELF_INDEX);
method.aload(ARGS_INDEX);
method.aload(ARGS_INDEX + 1); // block
method.invokestatic(getClassname(), "__file__", getStaticMethodSignature(getClassname(), 4));
method.areturn();
method.end();
if (methodCompiler.isSpecificArity()) {
// exact arg list __file__
method =
new SkinnyMethodAdapter(
getClassVisitor(),
ACC_PUBLIC,
"__file__",
getMethodSignature(scope.getRequiredArgs()),
null,
null);
method.start();
// invoke static __file__
method.aload(THIS);
method.aload(THREADCONTEXT_INDEX);
method.aload(SELF_INDEX);
for (int i = 0; i < scope.getRequiredArgs(); i++) {
method.aload(ARGS_INDEX + i);
}
method.aload(ARGS_INDEX + scope.getRequiredArgs()); // block
method.invokestatic(
getClassname(),
"__file__",
getStaticMethodSignature(getClassname(), scope.getRequiredArgs()));
method.areturn();
method.end();
}
return methodCompiler;
}
public void preCompiledClassDummyScope(RubyModule type, StaticScope staticScope) {
pushRubyClass(type);
pushFrameCopy();
getCurrentFrame().setSelf(type);
getCurrentFrame().setVisibility(Visibility.PUBLIC);
staticScope.setModule(type);
pushScope(staticScope.getDummyScope());
}
public void preMethodNoFrameAndDummyScope(RubyModule clazz, StaticScope staticScope) {
RubyModule implementationClass = staticScope.getModule();
// FIXME: This is currently only here because of some problems with IOOutputStream writing to a
// "bare" runtime without a proper scope
if (implementationClass == null) {
implementationClass = clazz;
}
pushScope(staticScope.getDummyScope());
pushRubyClass(implementationClass);
}
@JRubyMethod(name = "initialize", frame = true, visibility = Visibility.PRIVATE)
public IRubyObject initialize(ThreadContext context, Block procBlock) {
if (!procBlock.isGiven()) {
throw getRuntime().newArgumentError("tried to create Proc object without a block");
}
if (isLambda() && procBlock == null) {
// TODO: warn "tried to create Proc object without a block"
}
block = procBlock.cloneBlock();
if (isThread()) {
// modify the block with a new backref/lastline-grabbing scope
StaticScope oldScope = block.getBody().getStaticScope();
StaticScope newScope =
new BlockStaticScope(oldScope.getEnclosingScope(), oldScope.getVariables());
newScope.setBackrefLastlineScope(true);
newScope.setPreviousCRefScope(oldScope.getPreviousCRefScope());
newScope.setModule(oldScope.getModule());
block.getBody().setStaticScope(newScope);
}
block.type = type;
block.setProcObject(this);
file = context.getFile();
line = context.getLine();
return this;
}
private static Block getIterNodeBlock(Node blockNode, ThreadContext context, IRubyObject self) {
IterNode iterNode = (IterNode) blockNode;
StaticScope scope = iterNode.getScope();
scope.determineModule();
// Create block for this iter node
// FIXME: We shouldn't use the current scope if it's not actually from the same hierarchy of
// static scopes
return InterpretedBlock.newInterpretedClosure(context, iterNode.getBlockBody(), self);
}
// XXX: Again, screwy evaling under previous frame's scope
public void preExecuteUnder(RubyModule executeUnderClass, Block block) {
Frame frame = getCurrentFrame();
pushRubyClass(executeUnderClass);
DynamicScope scope = getCurrentScope();
StaticScope sScope = new BlockStaticScope(scope.getStaticScope());
sScope.setModule(executeUnderClass);
pushScope(DynamicScope.newDynamicScope(sScope, scope));
pushCallFrame(frame.getKlazz(), frame.getName(), frame.getSelf(), block);
getCurrentFrame().setVisibility(getPreviousFrame().getVisibility());
}
public static IRubyObject lexicalSearchConst(
ThreadContext context,
StaticScope scope,
MutableCallSite site,
String constName,
boolean noPrivateConsts)
throws Throwable {
Ruby runtime = context.runtime;
IRubyObject constant = scope.getConstantInner(constName);
if (constant == null) {
constant = UndefinedValue.UNDEFINED;
}
SwitchPoint switchPoint = (SwitchPoint) runtime.getConstantInvalidator(constName).getData();
// bind constant until invalidated
MethodHandle target = Binder.from(site.type()).drop(0, 2).constant(constant);
MethodHandle fallback =
Binder.from(site.type())
.append(site, constName)
.append(noPrivateConsts)
.invokeStatic(LOOKUP, Bootstrap.class, "lexicalSearchConst");
site.setTarget(switchPoint.guardWithTest(target, fallback));
return constant;
}
public static IRubyObject searchConst(
ThreadContext context,
StaticScope staticScope,
MutableCallSite site,
String constName,
boolean noPrivateConsts)
throws Throwable {
// Lexical lookup
Ruby runtime = context.getRuntime();
RubyModule object = runtime.getObject();
IRubyObject constant =
(staticScope == null)
? object.getConstant(constName)
: staticScope.getConstantInner(constName);
// Inheritance lookup
RubyModule module = null;
if (constant == null) {
// SSS FIXME: Is this null check case correct?
module = staticScope == null ? object : staticScope.getModule();
constant =
noPrivateConsts
? module.getConstantFromNoConstMissing(constName, false)
: module.getConstantNoConstMissing(constName);
}
// Call const_missing or cache
if (constant == null) {
return module.callMethod(context, "const_missing", context.runtime.fastNewSymbol(constName));
}
SwitchPoint switchPoint = (SwitchPoint) runtime.getConstantInvalidator(constName).getData();
// bind constant until invalidated
MethodHandle target = Binder.from(site.type()).drop(0, 2).constant(constant);
MethodHandle fallback =
Binder.from(site.type())
.append(site, constName)
.append(noPrivateConsts)
.invokeStatic(LOOKUP, Bootstrap.class, "searchConst");
site.setTarget(switchPoint.guardWithTest(target, fallback));
return constant;
}
public IRubyObject shadowing_lvar(IRubyObject identifier) {
String name = lexer.getIdent();
if (name == "_") return identifier;
StaticScope current = getCurrentScope();
if (current.isBlockScope()) {
if (current.exists(name) >= 0) yyerror("duplicated argument name");
if (lexer.isVerbose() && current.isDefined(name) >= 0) {
lexer.warning("shadowing outer local variable - " + name);
}
} else if (current.exists(name) >= 0) {
yyerror("duplicated argument name");
}
return identifier;
}
public static RubyModule getClassVariableBase(Ruby runtime, StaticScope scope) {
RubyModule rubyClass = scope.getModule();
while (rubyClass.isSingleton() || rubyClass == runtime.getDummy()) {
// We ran out of scopes to check
if (scope == null) return null;
scope = scope.getPreviousCRefScope();
rubyClass = scope.getModule();
if (scope.getPreviousCRefScope() == null) {
runtime
.getWarnings()
.warn(
ID.CVAR_FROM_TOPLEVEL_SINGLETON_METHOD,
"class variable access from toplevel singleton method");
}
}
return rubyClass;
}
public IRubyObject arg_var(IRubyObject identifier) {
String name = lexer.getIdent();
StaticScope current = getCurrentScope();
// Multiple _ arguments are allowed. To not screw with tons of arity
// issues in our runtime we will allocate unnamed bogus vars so things
// still work. MRI does not use name as intern'd value so they don't
// have this issue.
if (name == "_") {
int count = 0;
while (current.exists(name) >= 0) {
name = "_$" + count++;
}
}
current.addVariableThisScope(name);
return identifier;
}
private void setup(Block procBlock) {
if (!procBlock.isGiven()) {
throw getRuntime().newArgumentError("tried to create Proc object without a block");
}
if (isLambda()) {
// TODO: warn "tried to create Proc object without a block"
}
if (isThread()) {
// binding for incoming proc must not share frame
Binding oldBinding = procBlock.getBinding();
Binding newBinding =
new Binding(
oldBinding.getSelf(),
oldBinding.getFrame().duplicate(),
oldBinding.getVisibility(),
oldBinding.getDynamicScope(),
oldBinding.getMethod(),
oldBinding.getFile(),
oldBinding.getLine());
block = new Block(procBlock.getBody(), newBinding);
// modify the block with a new backref/lastline-grabbing scope
StaticScope oldScope = block.getBody().getStaticScope();
StaticScope newScope = oldScope.duplicate();
block.getBody().setStaticScope(newScope);
} else {
// just use as is
block = procBlock;
}
// force file/line info into the new block's binding
block.getBinding().setFile(block.getBody().getFile());
block.getBinding().setLine(block.getBody().getLine());
block.type = type;
block.setProcObject(this);
// pre-request dummy scope to avoid clone overhead in lightweight blocks
block.getBinding().getDummyScope(block.getBody().getStaticScope());
}
private static IRScope getEvalContainerScope(Ruby runtime, StaticScope evalScope) {
// SSS FIXME: Weirdness here. We cannot get the containing IR scope from evalScope because of
// static-scope wrapping
// that is going on
// 1. In all cases, DynamicScope.getEvalScope wraps the executing static scope in a new local
// scope.
// 2. For instance-eval (module-eval, class-eval) scenarios, there is an extra scope that is
// added to
// the stack in ThreadContext.java:preExecuteUnder
// I dont know what rule to apply when. However, in both these cases, since there is no
// IR-scope associated,
// I have used the hack below where I first unwrap once and see if I get a non-null IR scope.
// If that doesn't
// work, I unwarp once more and I am guaranteed to get the IR scope I want.
IRScope containingIRScope = ((IRStaticScope) evalScope.getEnclosingScope()).getIRScope();
if (containingIRScope == null)
containingIRScope =
((IRStaticScope) evalScope.getEnclosingScope().getEnclosingScope()).getIRScope();
return containingIRScope;
}
public void preMethodFrameAndScope(
RubyModule clazz, String name, IRubyObject self, Block block, StaticScope staticScope) {
RubyModule implementationClass = staticScope.getModule();
// FIXME: This is currently only here because of some problems with IOOutputStream writing to a
// "bare" runtime without a proper scope
if (implementationClass == null) {
implementationClass = clazz;
}
pushCallFrame(clazz, name, self, block);
pushScope(DynamicScope.newDynamicScope(staticScope));
pushRubyClass(implementationClass);
}
private Object cache(
ThreadContext context,
StaticScope currScope,
DynamicScope currDynScope,
IRubyObject self,
Object[] temp) {
StaticScope staticScope =
(StaticScope) definingScope.retrieve(context, self, currScope, currDynScope, temp);
IRubyObject constant = staticScope.getConstantInner(constName);
if (constant == null) {
constant = UndefinedValue.UNDEFINED;
} else {
// recache
Invalidator invalidator = context.runtime.getConstantInvalidator(constName);
cache = new ConstantCache(constant, invalidator.getData(), invalidator);
}
return constant;
}