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Issue #2828 - Part 12: Implement cascade layer SizeOfIncludingThis

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This commit is contained in:
Francis Dominic Fajardo 2025-07-22 12:29:41 +08:00 • committed by roytam1
commit e3476d33ed
3 changed files with 33 additions and 2 deletions
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5
layout/style/CascadeLayerRuleProcessor.cpp
View file

@ -223,8 +223,9 @@ CascadeLayerRuleProcessor::SizeOfExcludingThis(
mozilla::MallocSizeOf aMallocSizeOf) const
{
size_t n = 0;
n += mCascade->SizeOfIncludingThis(aMallocSizeOf);
// FIXME: size of attached cascade layer is not included.
// The cascade layer owns the rule cascade, so we don't count it here.
// We do count the layer itself, though.
n += mLayer->SizeOfIncludingThis(aMallocSizeOf);
return n;
}

28
layout/style/RuleCascadeData.cpp
View file

@ -1642,6 +1642,34 @@ CascadeLayer::~CascadeLayer()
delete mData;
}
size_t
CascadeLayer::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const
{
size_t n = aMallocSizeOf(this);
if (mData) {
n += mData->SizeOfIncludingThis(aMallocSizeOf);
}
n += mName.SizeOfExcludingThisIfUnshared(aMallocSizeOf);
n += mStyleRules.ShallowSizeOfExcludingThis(aMallocSizeOf);
// While we do create the child layers, they are not owned by us, so we
// don't count them. Their ownership is managed by the rule processor
// to which they are eventually attached (see nsCSSRuleProcessor).
n += mPreLayers.ShallowSizeOfExcludingThis(aMallocSizeOf);
n += mPostLayers.ShallowSizeOfExcludingThis(aMallocSizeOf);
n += mLayers.ShallowSizeOfExcludingThis(aMallocSizeOf);
for (auto iter = mLayers.ConstIter(); !iter.Done(); iter.Next()) {
// We don't own the CascadeLayer objects so we don't count them. We
// do care about the size of the keys' nsAString members' buffers though.
//
// Note that we depend on nsStringHashKey::GetKey() returning a reference,
// since otherwise aKey would be a copy of the string key and we would not
// be measuring the right object here.
n += iter.Key().SizeOfExcludingThisIfUnshared(aMallocSizeOf);
}
return n;
}
CascadeLayer*
CascadeLayer::CreateNamedChildLayer(const nsTArray<nsString>& aPath)
{

2
layout/style/RuleCascadeData.h
View file

@ -336,6 +336,8 @@ struct CascadeLayer
nsMediaQueryResultCacheKey& aCacheKey);
~CascadeLayer();
size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const;
nsPresContext* mPresContext;
nsString mName;
bool mIsAnonymous;