2010-05-22 17:09:52 -07:00
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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* vim: set ts=4 sw=4 et tw=99:
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*
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* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla SpiderMonkey JavaScript 1.9 code, released
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* May 28, 2008.
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*
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* The Initial Developer of the Original Code is
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* Brendan Eich <brendan@mozilla.org>
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*
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* Contributor(s):
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* David Anderson <danderson@mozilla.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#if !defined jsjaeger_bytecodeAnalyzer_h__ && defined JS_METHODJIT
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#define jsjaeger_bytecodeAnalyzer_h__
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#include "jsapi.h"
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#include "jscntxt.h"
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#include "jsscript.h"
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#include "jsopcode.h"
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namespace js
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{
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struct OpcodeStatus
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{
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bool visited; /* flag for CFG traversal */
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bool exceptionEntry; /* true iff this is a catch/finally entry point */
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bool safePoint; /* false by default */
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uint32 nincoming; /* number of CFG inedges here */
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uint32 stackDepth; /* stack depth before this opcode */
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};
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class BytecodeAnalyzer
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{
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JSContext *cx;
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JSScript *script;
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OpcodeStatus *ops;
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Vector<jsbytecode *, 16, ContextAllocPolicy> doList;
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public:
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BytecodeAnalyzer(JSContext *cx, JSScript *script)
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: cx(cx), script(script), ops(NULL),
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doList(ContextAllocPolicy(cx))
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{
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}
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~BytecodeAnalyzer();
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bool analyze(uint32 offs);
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bool addEdge(jsbytecode *pc, int32 offset, uint32 stackDepth);
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public:
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2010-05-22 17:41:21 -07:00
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inline const OpcodeStatus & operator [](uint32 offs) const {
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2010-05-22 17:09:52 -07:00
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JS_ASSERT(offs < script->length);
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return ops[offs];
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}
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2010-05-22 17:41:21 -07:00
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inline OpcodeStatus & operator [](uint32 offs) {
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JS_ASSERT(offs < script->length);
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return ops[offs];
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}
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2010-05-22 17:41:21 -07:00
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inline const OpcodeStatus & operator [](jsbytecode *pc) const {
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JS_ASSERT(pc < script->code + script->length);
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return ops[pc - script->code];
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}
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2010-05-22 17:41:21 -07:00
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inline OpcodeStatus & operator [](jsbytecode *pc) {
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JS_ASSERT(pc < script->code + script->length);
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return ops[pc - script->code];
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}
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2010-05-22 17:41:21 -07:00
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inline bool OOM() { return !ops; }
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2010-05-22 17:09:52 -07:00
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bool analyze();
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};
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}
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#endif /* jsjaeger_bytecodeAnalyzer_h__ */
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