The Tor Browser / file comparison
comparison: layout/style/nsRuleData.cpp
layout/style/nsRuleData.cpp
- branch
- TOR_BUG_9701
- changeset 14
- 925c144e1f1f
equal
deleted
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replaced
| -1:000000000000 | 0:5227421d4903 |
|---|---|
| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 #include "nsRuleData.h" | |
| 7 | |
| 8 #include "mozilla/Poison.h" | |
| 9 #include <stdint.h> | |
| 10 | |
| 11 inline size_t | |
| 12 nsRuleData::GetPoisonOffset() | |
| 13 { | |
| 14 // Fill in mValueOffsets such that mValueStorage + mValueOffsets[i] | |
| 15 // will yield the frame poison value for all uninitialized value | |
| 16 // offsets. | |
| 17 static_assert(sizeof(uintptr_t) == sizeof(size_t), | |
| 18 "expect uintptr_t and size_t to be the same size"); | |
| 19 static_assert(uintptr_t(-1) > uintptr_t(0), | |
| 20 "expect uintptr_t to be unsigned"); | |
| 21 static_assert(size_t(-1) > size_t(0), | |
| 22 "expect size_t to be unsigned"); | |
| 23 uintptr_t framePoisonValue = mozPoisonValue(); | |
| 24 return size_t(framePoisonValue - uintptr_t(mValueStorage)) / | |
| 25 sizeof(nsCSSValue); | |
| 26 } | |
| 27 | |
| 28 nsRuleData::nsRuleData(uint32_t aSIDs, nsCSSValue* aValueStorage, | |
| 29 nsPresContext* aContext, nsStyleContext* aStyleContext) | |
| 30 : mSIDs(aSIDs), | |
| 31 mCanStoreInRuleTree(true), | |
| 32 mPresContext(aContext), | |
| 33 mStyleContext(aStyleContext), | |
| 34 mValueStorage(aValueStorage) | |
| 35 { | |
| 36 #ifndef MOZ_VALGRIND | |
| 37 size_t framePoisonOffset = GetPoisonOffset(); | |
| 38 for (size_t i = 0; i < nsStyleStructID_Length; ++i) { | |
| 39 mValueOffsets[i] = framePoisonOffset; | |
| 40 } | |
| 41 #endif | |
| 42 } | |
| 43 | |
| 44 #ifdef DEBUG | |
| 45 nsRuleData::~nsRuleData() | |
| 46 { | |
| 47 #ifndef MOZ_VALGRIND | |
| 48 // assert nothing in mSIDs has poison value | |
| 49 size_t framePoisonOffset = GetPoisonOffset(); | |
| 50 for (size_t i = 0; i < nsStyleStructID_Length; ++i) { | |
| 51 NS_ABORT_IF_FALSE(!(mSIDs & (1 << i)) || | |
| 52 mValueOffsets[i] != framePoisonOffset, | |
| 53 "value in SIDs was left with poison offset"); | |
| 54 } | |
| 55 #endif | |
| 56 } | |
| 57 #endif |
