Mercurial > hg > graal-compiler
view graal/com.oracle.truffle.ruby.nodes/src/com/oracle/truffle/ruby/nodes/control/TryNode.java @ 13556:44288fe54352
Ruby: fix some ?break? semantics.
author | Chris Seaton <chris.seaton@oracle.com> |
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date | Wed, 08 Jan 2014 17:42:10 +0000 |
parents | 0fbee3eb71f0 |
children |
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/* * Copyright (c) 2013 Oracle and/or its affiliates. All rights reserved. This * code is released under a tri EPL/GPL/LGPL license. You can use it, * redistribute it and/or modify it under the terms of the: * * Eclipse Public License version 1.0 * GNU General Public License version 2 * GNU Lesser General Public License version 2.1 */ package com.oracle.truffle.ruby.nodes.control; import com.oracle.truffle.api.*; import com.oracle.truffle.api.frame.*; import com.oracle.truffle.api.nodes.*; import com.oracle.truffle.api.utilities.*; import com.oracle.truffle.ruby.nodes.*; import com.oracle.truffle.ruby.runtime.*; import com.oracle.truffle.ruby.runtime.control.*; import com.oracle.truffle.ruby.runtime.objects.*; /** * Represents a block of code run with exception handlers. There's no {@code try} keyword in Ruby - * it's implicit - but it's similar to a try statement in any other language. */ @NodeInfo(shortName = "try") public class TryNode extends RubyNode { @Child protected RubyNode tryPart; @Children final RescueNode[] rescueParts; @Child protected RubyNode elsePart; private final BranchProfile controlFlowProfile = new BranchProfile(); public TryNode(RubyContext context, SourceSection sourceSection, RubyNode tryPart, RescueNode[] rescueParts, RubyNode elsePart) { super(context, sourceSection); this.tryPart = adoptChild(tryPart); this.rescueParts = adoptChildren(rescueParts); this.elsePart = adoptChild(elsePart); } @Override public Object execute(VirtualFrame frame) { while (true) { try { final Object result = tryPart.execute(frame); elsePart.executeVoid(frame); return result; } catch (ControlFlowException exception) { controlFlowProfile.enter(); throw exception; } catch (RuntimeException exception) { CompilerDirectives.transferToInterpreter(); try { return handleException(frame, exception); } catch (RetryException e) { continue; } } } } private Object handleException(VirtualFrame frame, RuntimeException exception) { CompilerAsserts.neverPartOfCompilation(); final RubyContext context = getContext(); final RubyBasicObject rubyException = ExceptionTranslator.translateException(context, exception); context.getCoreLibrary().getGlobalVariablesObject().setInstanceVariable("$!", rubyException); for (RescueNode rescue : rescueParts) { if (rescue.canHandle(frame, rubyException)) { return rescue.execute(frame); } } throw exception; } }