js/src/jit/mips/Bailouts-mips.cpp@6474c204b198 (annotated)
js/src/jit/mips/Bailouts-mips.cpp
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| 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 | #include "jit/mips/Bailouts-mips.h" |
| michael@0 | 8 | |
| michael@0 | 9 | #include "jscntxt.h" |
| michael@0 | 10 | #include "jscompartment.h" |
| michael@0 | 11 | |
| michael@0 | 12 | using namespace js; |
| michael@0 | 13 | using namespace js::jit; |
| michael@0 | 14 | |
| michael@0 | 15 | IonBailoutIterator::IonBailoutIterator(const JitActivationIterator &activations, |
| michael@0 | 16 | BailoutStack *bailout) |
| michael@0 | 17 | : IonFrameIterator(activations), |
| michael@0 | 18 | machine_(bailout->machine()) |
| michael@0 | 19 | { |
| michael@0 | 20 | uint8_t *sp = bailout->parentStackPointer(); |
| michael@0 | 21 | uint8_t *fp = sp + bailout->frameSize(); |
| michael@0 | 22 | |
| michael@0 | 23 | current_ = fp; |
| michael@0 | 24 | type_ = JitFrame_IonJS; |
| michael@0 | 25 | topFrameSize_ = current_ - sp; |
| michael@0 | 26 | topIonScript_ = script()->ionScript(); |
| michael@0 | 27 | |
| michael@0 | 28 | if (bailout->frameClass() == FrameSizeClass::None()) { |
| michael@0 | 29 | snapshotOffset_ = bailout->snapshotOffset(); |
| michael@0 | 30 | return; |
| michael@0 | 31 | } |
| michael@0 | 32 | |
| michael@0 | 33 | // Compute the snapshot offset from the bailout ID. |
| michael@0 | 34 | JitActivation *activation = activations.activation()->asJit(); |
| michael@0 | 35 | JSRuntime *rt = activation->compartment()->runtimeFromMainThread(); |
| michael@0 | 36 | JitCode *code = rt->jitRuntime()->getBailoutTable(bailout->frameClass()); |
| michael@0 | 37 | uintptr_t tableOffset = bailout->tableOffset(); |
| michael@0 | 38 | uintptr_t tableStart = reinterpret_cast<uintptr_t>(code->raw()); |
| michael@0 | 39 | |
| michael@0 | 40 | MOZ_ASSERT(tableOffset >= tableStart && |
| michael@0 | 41 | tableOffset < tableStart + code->instructionsSize()); |
| michael@0 | 42 | MOZ_ASSERT((tableOffset - tableStart) % BAILOUT_TABLE_ENTRY_SIZE == 0); |
| michael@0 | 43 | |
| michael@0 | 44 | uint32_t bailoutId = ((tableOffset - tableStart) / BAILOUT_TABLE_ENTRY_SIZE) - 1; |
| michael@0 | 45 | MOZ_ASSERT(bailoutId < BAILOUT_TABLE_SIZE); |
| michael@0 | 46 | |
| michael@0 | 47 | snapshotOffset_ = topIonScript_->bailoutToSnapshot(bailoutId); |
| michael@0 | 48 | } |
| michael@0 | 49 | |
| michael@0 | 50 | IonBailoutIterator::IonBailoutIterator(const JitActivationIterator &activations, |
| michael@0 | 51 | InvalidationBailoutStack *bailout) |
| michael@0 | 52 | : IonFrameIterator(activations), |
| michael@0 | 53 | machine_(bailout->machine()) |
| michael@0 | 54 | { |
| michael@0 | 55 | returnAddressToFp_ = bailout->osiPointReturnAddress(); |
| michael@0 | 56 | topIonScript_ = bailout->ionScript(); |
| michael@0 | 57 | const OsiIndex *osiIndex = topIonScript_->getOsiIndex(returnAddressToFp_); |
| michael@0 | 58 | |
| michael@0 | 59 | current_ = (uint8_t*) bailout->fp(); |
| michael@0 | 60 | type_ = JitFrame_IonJS; |
| michael@0 | 61 | topFrameSize_ = current_ - bailout->sp(); |
| michael@0 | 62 | snapshotOffset_ = osiIndex->snapshotOffset(); |
| michael@0 | 63 | } |
