The Tor Browser: js/src/jit/BaselineInspector.h@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-

     2  * vim: set ts=8 sts=4 et sw=4 tw=99:

     3  * This Source Code Form is subject to the terms of the Mozilla Public

     4  * License, v. 2.0. If a copy of the MPL was not distributed with this

     5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     7 #ifndef jit_BaselineInspector_h

     8 #define jit_BaselineInspector_h

    10 #ifdef JS_ION

    12 #include "jit/BaselineIC.h"

    13 #include "jit/BaselineJIT.h"

    14 #include "jit/MIR.h"

    16 namespace js {

    17 namespace jit {

    19 class BaselineInspector;

    21 class ICInspector

    22 {

    23   protected:

    24     BaselineInspector *inspector_;

    25     jsbytecode *pc_;

    26     ICEntry *icEntry_;

    28     ICInspector(BaselineInspector *inspector, jsbytecode *pc, ICEntry *icEntry)

    29       : inspector_(inspector), pc_(pc), icEntry_(icEntry)

    30     { }

    31 };

    33 class SetElemICInspector : public ICInspector

    34 {

    35   public:

    36     SetElemICInspector(BaselineInspector *inspector, jsbytecode *pc, ICEntry *icEntry)

    37       : ICInspector(inspector, pc, icEntry)

    38     { }

    40     bool sawOOBDenseWrite() const;

    41     bool sawOOBTypedArrayWrite() const;

    42     bool sawDenseWrite() const;

    43     bool sawTypedArrayWrite() const;

    44 };

    46 class BaselineInspector

    47 {

    48   private:

    49     JSScript *script;

    50     ICEntry *prevLookedUpEntry;

    52   public:

    53     BaselineInspector(JSScript *script)

    54       : script(script), prevLookedUpEntry(nullptr)

    55     {

    56         JS_ASSERT(script);

    57     }

    59     bool hasBaselineScript() const {

    60         return script->hasBaselineScript();

    61     }

    63     BaselineScript *baselineScript() const {

    64         return script->baselineScript();

    65     }

    67   private:

    68 #ifdef DEBUG

    69     bool isValidPC(jsbytecode *pc) {

    70         return script->containsPC(pc);

    71     }

    72 #endif

    74     ICEntry &icEntryFromPC(jsbytecode *pc) {

    75         JS_ASSERT(hasBaselineScript());

    76         JS_ASSERT(isValidPC(pc));

    77         ICEntry &ent = baselineScript()->icEntryFromPCOffset(script->pcToOffset(pc), prevLookedUpEntry);

    78         JS_ASSERT(ent.isForOp());

    79         prevLookedUpEntry = &ent;

    80         return ent;

    81     }

    83     template <typename ICInspectorType>

    84     ICInspectorType makeICInspector(jsbytecode *pc, ICStub::Kind expectedFallbackKind) {

    85         ICEntry *ent = nullptr;

    86         if (hasBaselineScript()) {

    87             ent = &icEntryFromPC(pc);

    88             JS_ASSERT(ent->fallbackStub()->kind() == expectedFallbackKind);

    89         }

    90         return ICInspectorType(this, pc, ent);

    91     }

    93     ICStub *monomorphicStub(jsbytecode *pc);

    94     bool dimorphicStub(jsbytecode *pc, ICStub **pfirst, ICStub **psecond);

    96   public:

    97     typedef Vector<Shape *, 4, IonAllocPolicy> ShapeVector;

    98     bool maybeShapesForPropertyOp(jsbytecode *pc, ShapeVector &shapes);

   100     SetElemICInspector setElemICInspector(jsbytecode *pc) {

   101         return makeICInspector<SetElemICInspector>(pc, ICStub::SetElem_Fallback);

   102     }

   104     MIRType expectedResultType(jsbytecode *pc);

   105     MCompare::CompareType expectedCompareType(jsbytecode *pc);

   106     MIRType expectedBinaryArithSpecialization(jsbytecode *pc);

   108     bool hasSeenNonNativeGetElement(jsbytecode *pc);

   109     bool hasSeenNegativeIndexGetElement(jsbytecode *pc);

   110     bool hasSeenAccessedGetter(jsbytecode *pc);

   111     bool hasSeenDoubleResult(jsbytecode *pc);

   112     bool hasSeenNonStringIterNext(jsbytecode *pc);

   114     JSObject *getTemplateObject(jsbytecode *pc);

   115     JSObject *getTemplateObjectForNative(jsbytecode *pc, Native native);

   117     DeclEnvObject *templateDeclEnvObject();

   118     CallObject *templateCallObject();

   120     JSObject *commonGetPropFunction(jsbytecode *pc, Shape **lastProperty, JSFunction **commonGetter);

   121     JSObject *commonSetPropFunction(jsbytecode *pc, Shape **lastProperty, JSFunction **commonSetter);

   122 };

   124 } // namespace jit

   125 } // namespace js

   127 #endif // JS_ION

   129 #endif /* jit_BaselineInspector_h */

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