The Tor Browser: js/src/jit/AsmJSLink.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_AsmJSLink_h

     8 #define jit_AsmJSLink_h

    10 #include "NamespaceImports.h"

    12 class JSAtom;

    14 namespace js {

    16 class AsmJSActivation;

    17 class AsmJSModule;

    18 namespace jit { class CallSite; }

    20 // Iterates over the frames of a single AsmJSActivation.

    21 class AsmJSFrameIterator

    22 {

    23     const AsmJSModule *module_;

    24     const jit::CallSite *callsite_;

    25     uint8_t *sp_;

    26     uint8_t *returnAddress_;

    28     void popFrame();

    29     void settle();

    31   public:

    32     AsmJSFrameIterator(const AsmJSActivation *activation);

    33     void operator++() { popFrame(); settle(); }

    34     bool done() const { return !callsite_; }

    35     JSAtom *functionDisplayAtom() const;

    36     unsigned computeLine(uint32_t *column) const;

    37 };

    39 #ifdef JS_ION

    41 // Create a new JSFunction to replace originalFun as the representation of the

    42 // function defining the succesfully-validated module 'moduleObj'.

    43 extern JSFunction *

    44 NewAsmJSModuleFunction(ExclusiveContext *cx, JSFunction *originalFun, HandleObject moduleObj);

    46 // Return whether this is the js::Native returned by NewAsmJSModuleFunction.

    47 extern bool

    48 IsAsmJSModuleNative(JSNative native);

    50 // Return whether the given value is a function containing "use asm" that has

    51 // been validated according to the asm.js spec.

    52 extern bool

    53 IsAsmJSModule(JSContext *cx, unsigned argc, JS::Value *vp);

    54 extern bool

    55 IsAsmJSModule(HandleFunction fun);

    57 extern JSString*

    58 AsmJSModuleToString(JSContext *cx, HandleFunction fun, bool addParenToLambda);

    60 // Return whether the given value is a function containing "use asm" that was

    61 // loaded directly from the cache (and hence was validated previously).

    62 extern bool

    63 IsAsmJSModuleLoadedFromCache(JSContext *cx, unsigned argc, Value *vp);

    65 // Return whether the given value is a nested function in an asm.js module that

    66 // has been both compile- and link-time validated.

    67 extern bool

    68 IsAsmJSFunction(JSContext *cx, unsigned argc, JS::Value *vp);

    69 extern bool

    70 IsAsmJSFunction(HandleFunction fun);

    72 extern JSString *

    73 AsmJSFunctionToString(JSContext *cx, HandleFunction fun);

    75 #else // JS_ION

    77 inline bool

    78 IsAsmJSModuleNative(JSNative native)

    79 {

    80     return false;

    81 }

    83 inline bool

    84 IsAsmJSFunction(JSContext *cx, unsigned argc, Value *vp)

    85 {

    86     CallArgs args = CallArgsFromVp(argc, vp);

    87     args.rval().set(BooleanValue(false));

    88     return true;

    89 }

    91 inline bool

    92 IsAsmJSFunction(HandleFunction fun)

    93 {

    94     return false;

    95 }

    97 inline JSString *

    98 AsmJSFunctionToString(JSContext *cx, HandleFunction fun)

    99 {

   100     return nullptr;

   101 }

   103 inline bool

   104 IsAsmJSModule(JSContext *cx, unsigned argc, Value *vp)

   105 {

   106     CallArgs args = CallArgsFromVp(argc, vp);

   107     args.rval().set(BooleanValue(false));

   108     return true;

   109 }

   111 inline bool

   112 IsAsmJSModule(HandleFunction fun)

   113 {

   114     return false;

   115 }

   117 inline JSString*

   118 AsmJSModuleToString(JSContext *cx, HandleFunction fun, bool addParenToLambda)

   119 {

   120     return nullptr;

   121 }

   123 inline bool

   124 IsAsmJSModuleLoadedFromCache(JSContext *cx, unsigned argc, Value *vp)

   125 {

   126     CallArgs args = CallArgsFromVp(argc, vp);

   127     args.rval().set(BooleanValue(false));

   128     return true;

   129 }

   131 #endif // JS_ION

   133 } // namespace js

   135 #endif // jit_AsmJS_h

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