LCOV - app.info - js/src/methodjit/StubCompiler.h

LCOV - code coverage report
| Current view: | directory - js/src/methodjit - StubCompiler.h (source / functions) |  | Found | Hit | Coverage |
| Test: | app.info | Lines: | 11 | 11 | 100.0 %
| Date: | 2012-04-07 | Functions: | 6 | 6 | 100.0 %

           1                 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
           2                 :  * vim: set ts=4 sw=4 et tw=99:
           3                 :  *
           4                 :  * ***** BEGIN LICENSE BLOCK *****
           5                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
           6                 :  *
           7                 :  * The contents of this file are subject to the Mozilla Public License Version
           8                 :  * 1.1 (the "License"); you may not use this file except in compliance with
           9                 :  * the License. You may obtain a copy of the License at
          10                 :  * http://www.mozilla.org/MPL/
          11                 :  *
          12                 :  * Software distributed under the License is distributed on an "AS IS" basis,
          13                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
          14                 :  * for the specific language governing rights and limitations under the
          15                 :  * License.
          16                 :  *
          17                 :  * The Original Code is Mozilla SpiderMonkey JavaScript 1.9 code, released
          18                 :  * May 28, 2008.
          19                 :  *
          20                 :  * The Initial Developer of the Original Code is
          21                 :  *   Brendan Eich <brendan@mozilla.org>
          22                 :  *
          23                 :  * Contributor(s):
          24                 :  *   David Anderson <danderson@mozilla.com>
          25                 :  *   David Mandelin <dmandelin@mozilla.com>
          26                 :  *
          27                 :  * Alternatively, the contents of this file may be used under the terms of
          28                 :  * either of the GNU General Public License Version 2 or later (the "GPL"),
          29                 :  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
          30                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
          31                 :  * of those above. If you wish to allow use of your version of this file only
          32                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
          33                 :  * use your version of this file under the terms of the MPL, indicate your
          34                 :  * decision by deleting the provisions above and replace them with the notice
          35                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
          36                 :  * the provisions above, a recipient may use your version of this file under
          37                 :  * the terms of any one of the MPL, the GPL or the LGPL.
          38                 :  *
          39                 :  * ***** END LICENSE BLOCK ***** */
          40                 :
          41                 : #if !defined(jsstub_compiler_h__) && defined(JS_METHODJIT)
          42                 : #define jsstub_compiler_h__
          43                 :
          44                 : #include "jscntxt.h"
          45                 : #include "MethodJIT.h"
          46                 : #include "methodjit/FrameState.h"
          47                 : #include "CodeGenIncludes.h"
          48                 :
          49                 : namespace js {
          50                 : namespace mjit {
          51                 :
          52                 : class Compiler;
          53                 :
          54                 : class StubCompiler
          55           95862 : {
          56                 :     typedef JSC::MacroAssembler::Call Call;
          57                 :     typedef JSC::MacroAssembler::Jump Jump;
          58                 :     typedef JSC::MacroAssembler::Label Label;
          59                 :
          60         9621796 :     struct CrossPatch {
          61         5012580 :         CrossPatch(Jump from, Label to)
          62         5012580 :           : from(from), to(to)
          63         5012580 :         { }
          64                 :
          65                 :         Jump from;
          66                 :         Label to;
          67                 :     };
          68                 :
          69           92874 :     struct CrossJumpInScript {
          70           92874 :         CrossJumpInScript(Jump from, jsbytecode *pc, uint32_t inlineIndex)
          71           92874 :           : from(from), pc(pc), inlineIndex(inlineIndex)
          72           92874 :         { }
          73                 :
          74                 :         Jump from;
          75                 :         jsbytecode *pc;
          76                 :         uint32_t inlineIndex;
          77                 :     };
          78                 :
          79                 :     JSContext *cx;
          80                 :     Compiler &cc;
          81                 :     FrameState &frame;
          82                 :
          83                 :   public:
          84                 :     Assembler masm;
          85                 :
          86                 :   private:
          87                 :     uint32_t generation;
          88                 :     uint32_t lastGeneration;
          89                 :
          90                 :     Vector<CrossPatch, 64, mjit::CompilerAllocPolicy> exits;
          91                 :     Vector<CrossPatch, 64, mjit::CompilerAllocPolicy> joins;
          92                 :     Vector<CrossJumpInScript, 64, mjit::CompilerAllocPolicy> scriptJoins;
          93                 :     Vector<Jump, 8, SystemAllocPolicy> jumpList;
          94                 :
          95                 :   public:
          96                 :     StubCompiler(JSContext *cx, mjit::Compiler &cc, FrameState &frame);
          97                 :
          98         1036115 :     size_t size() {
          99         1036115 :         return masm.size();
         100                 :     }
         101                 :
         102                 :     uint8_t *buffer() {
         103                 :         return masm.buffer();
         104                 :     }
         105                 :
         106                 :     /*
         107                 :      * Force a frame sync and return a label before the syncing code.
         108                 :      * A Jump may bind to the label with leaveExitDirect().
         109                 :      */
         110                 :     JSC::MacroAssembler::Label syncExit(Uses uses);
         111                 :
         112                 :     /*
         113                 :      * Sync the exit, and state that code will be immediately outputted
         114                 :      * to the out-of-line buffer.
         115                 :      */
         116                 :     JSC::MacroAssembler::Label syncExitAndJump(Uses uses);
         117                 :
         118                 :     /* Exits from the fast path into the slow path. */
         119                 :     JSC::MacroAssembler::Label linkExit(Jump j, Uses uses);
         120                 :     void linkExitForBranch(Jump j);
         121                 :     void linkExitDirect(Jump j, Label L);
         122                 :
         123                 :     void leave();
         124                 :     void leaveWithDepth(uint32_t depth);
         125                 :
         126                 :     /*
         127                 :      * Rejoins slow-path code back to the fast-path. The invalidation param
         128                 :      * specifies how many stack slots below sp must not be reloaded from
         129                 :      * registers.
         130                 :      */
         131                 :     void rejoin(Changes changes);
         132                 :     void linkRejoin(Jump j);
         133                 :
         134                 :     /* Finish all native code patching. */
         135                 :     void fixCrossJumps(uint8_t *ncode, size_t offset, size_t total);
         136                 :     bool jumpInScript(Jump j, jsbytecode *target);
         137                 :     unsigned crossJump(Jump j, Label l);
         138                 :
         139                 :     Call emitStubCall(void *ptr, RejoinState rejoin, Uses uses);
         140                 :     Call emitStubCall(void *ptr, RejoinState rejoin, Uses uses, int32_t slots);
         141                 :
         142                 :     void patchJoin(unsigned i, bool script, Assembler::Address address, AnyRegisterID reg);
         143                 : };
         144                 :
         145                 : } /* namepsace mjit */
         146                 : } /* namespace js */
         147                 :
         148                 : #endif /* jsstub_compiler_h__ */
         149                 :

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