js/src/jit/BytecodeAnalysis.h@129ffea94266 (annotated)
js/src/jit/BytecodeAnalysis.h
Sat, 03 Jan 2015 20:18:00 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Sat, 03 Jan 2015 20:18:00 +0100
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
- permissions
- -rw-r--r--
Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- |
| michael@0 | 2 | * vim: set ts=8 sts=4 et sw=4 tw=99: |
| michael@0 | 3 | * This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 4 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 5 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 6 | |
| michael@0 | 7 | #ifndef jit_BytecodeAnalysis_h |
| michael@0 | 8 | #define jit_BytecodeAnalysis_h |
| michael@0 | 9 | |
| michael@0 | 10 | #include "jsscript.h" |
| michael@0 | 11 | #include "jit/IonAllocPolicy.h" |
| michael@0 | 12 | #include "js/Vector.h" |
| michael@0 | 13 | |
| michael@0 | 14 | namespace js { |
| michael@0 | 15 | namespace jit { |
| michael@0 | 16 | |
| michael@0 | 17 | // Basic information about bytecodes in the script. Used to help baseline compilation. |
| michael@0 | 18 | struct BytecodeInfo |
| michael@0 | 19 | { |
| michael@0 | 20 | static const uint16_t MAX_STACK_DEPTH = 0xffffU; |
| michael@0 | 21 | uint16_t stackDepth; |
| michael@0 | 22 | bool initialized : 1; |
| michael@0 | 23 | bool jumpTarget : 1; |
| michael@0 | 24 | bool jumpFallthrough : 1; |
| michael@0 | 25 | bool fallthrough : 1; |
| michael@0 | 26 | |
| michael@0 | 27 | // If true, this is a JSOP_LOOPENTRY op inside a catch or finally block. |
| michael@0 | 28 | bool loopEntryInCatchOrFinally : 1; |
| michael@0 | 29 | |
| michael@0 | 30 | void init(unsigned depth) { |
| michael@0 | 31 | JS_ASSERT(depth <= MAX_STACK_DEPTH); |
| michael@0 | 32 | JS_ASSERT_IF(initialized, stackDepth == depth); |
| michael@0 | 33 | initialized = true; |
| michael@0 | 34 | stackDepth = depth; |
| michael@0 | 35 | } |
| michael@0 | 36 | }; |
| michael@0 | 37 | |
| michael@0 | 38 | class BytecodeAnalysis |
| michael@0 | 39 | { |
| michael@0 | 40 | JSScript *script_; |
| michael@0 | 41 | Vector<BytecodeInfo, 0, IonAllocPolicy> infos_; |
| michael@0 | 42 | |
| michael@0 | 43 | bool usesScopeChain_; |
| michael@0 | 44 | bool hasTryFinally_; |
| michael@0 | 45 | bool hasSetArg_; |
| michael@0 | 46 | |
| michael@0 | 47 | public: |
| michael@0 | 48 | explicit BytecodeAnalysis(TempAllocator &alloc, JSScript *script); |
| michael@0 | 49 | |
| michael@0 | 50 | bool init(TempAllocator &alloc, GSNCache &gsn); |
| michael@0 | 51 | |
| michael@0 | 52 | BytecodeInfo &info(jsbytecode *pc) { |
| michael@0 | 53 | JS_ASSERT(infos_[script_->pcToOffset(pc)].initialized); |
| michael@0 | 54 | return infos_[script_->pcToOffset(pc)]; |
| michael@0 | 55 | } |
| michael@0 | 56 | |
| michael@0 | 57 | BytecodeInfo *maybeInfo(jsbytecode *pc) { |
| michael@0 | 58 | if (infos_[script_->pcToOffset(pc)].initialized) |
| michael@0 | 59 | return &infos_[script_->pcToOffset(pc)]; |
| michael@0 | 60 | return nullptr; |
| michael@0 | 61 | } |
| michael@0 | 62 | |
| michael@0 | 63 | bool usesScopeChain() const { |
| michael@0 | 64 | return usesScopeChain_; |
| michael@0 | 65 | } |
| michael@0 | 66 | |
| michael@0 | 67 | bool hasTryFinally() const { |
| michael@0 | 68 | return hasTryFinally_; |
| michael@0 | 69 | } |
| michael@0 | 70 | |
| michael@0 | 71 | bool hasSetArg() const { |
| michael@0 | 72 | return hasSetArg_; |
| michael@0 | 73 | } |
| michael@0 | 74 | }; |
| michael@0 | 75 | |
| michael@0 | 76 | |
| michael@0 | 77 | } // namespace jit |
| michael@0 | 78 | } // namespace js |
| michael@0 | 79 | |
| michael@0 | 80 | #endif /* jit_BytecodeAnalysis_h */ |
