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[scudo] Minor refactor on element address validation (NFC) (#119436)

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ChiaHungDuan 2024-12-10 13:58:02 -08:00 committed by GitHub
parent e7e42ef116
commit 5a930339a5
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GPG Key ID: B5690EEEBB952194
1 changed files with 11 additions and 5 deletions
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16
compiler-rt/lib/scudo/standalone/list.h
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@ -74,7 +74,7 @@ public:
if (Next == nullptr) {
X->Next = getEndOfListVal();
} else {
DCHECK_LE(static_cast<LinkTy>(Next - Base), Size);
assertElementInRange(Next);
X->Next = static_cast<LinkTy>(Next - Base);
}
}
@ -88,16 +88,22 @@ public:
}
// Set `X->Prev` to `Prev`.
void setPrev(T *X, T *Prev) const {
DCHECK_LT(reinterpret_cast<uptr>(Prev),
reinterpret_cast<uptr>(Base + Size));
if (Prev == nullptr)
if (Prev == nullptr) {
X->Prev = getEndOfListVal();
else
} else {
assertElementInRange(Prev);
X->Prev = static_cast<LinkTy>(Prev - Base);
}
}
LinkTy getEndOfListVal() const { return T::EndOfListVal; }
private:
void assertElementInRange(T *X) const {
DCHECK_GE(reinterpret_cast<uptr>(X), reinterpret_cast<uptr>(Base));
DCHECK_LE(static_cast<LinkTy>(X - Base), Size);
}
protected:
T *Base = nullptr;
LinkTy Size = 0;