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Div protection

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This commit is contained in:
Brian Fiete 2020-06-10 05:44:38 -07:00
parent a955361f6a
commit 4cf6af53bd
1 changed files with 10 additions and 6 deletions
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4
BeefRT/dbg/gc_raw.cpp
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@ -136,6 +136,8 @@ void BFGC::RawMarkSpan(tcmalloc_raw::Span* span, int expectedStartPage)
// It's possible we can overestimate elemCount, particularly for large allocations. This doesn't cause a problem // It's possible we can overestimate elemCount, particularly for large allocations. This doesn't cause a problem
// because we can safely mark on complete random memory -- pointer values are always validated before being followed // because we can safely mark on complete random memory -- pointer values are always validated before being followed
intptr elemStride = BF_ALIGN(rawAllocData->mType->mSize, rawAllocData->mType->mAlign); intptr elemStride = BF_ALIGN(rawAllocData->mType->mSize, rawAllocData->mType->mAlign);
if (elemStride > 0)
{
intptr dataSize = elementSize - extraDataSize; intptr dataSize = elementSize - extraDataSize;
intptr elemCount = dataSize / elemStride; intptr elemCount = dataSize / elemStride;
for (intptr elemIdx = 0; elemIdx < elemCount; elemIdx++) for (intptr elemIdx = 0; elemIdx < elemCount; elemIdx++)
@ -144,6 +146,7 @@ void BFGC::RawMarkSpan(tcmalloc_raw::Span* span, int expectedStartPage)
} }
} }
} }
}
spanPtr = (void*)((intptr)spanPtr + elementSize); spanPtr = (void*)((intptr)spanPtr + elementSize);
} }
@ -284,6 +287,7 @@ void BFGC::RawReportHandleSpan(tcmalloc_raw::Span* span, int expectedStartPage,
typeSize = rawAllocData->mType->mSize; typeSize = rawAllocData->mType->mSize;
else else
typeSize = ((bf::System::Type_NOFLAGS*)rawAllocData->mType)->mSize; typeSize = ((bf::System::Type_NOFLAGS*)rawAllocData->mType)->mSize;
if (typeSize > 0)
rawLeakInfo.mDataCount = (elementSize - extraDataSize) / typeSize; rawLeakInfo.mDataCount = (elementSize - extraDataSize) / typeSize;
} }
else else