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Check freed debug block fill patterns 32 bytes at a time #97

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Check freed debug block fill patterns 32 bytes at a time #97

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17 changes: 16 additions & 1 deletion FastMM5.pas
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Original file line number Diff line number Diff line change
Expand Up @@ -4451,9 +4451,24 @@ function CheckFreedDebugBlockFillPatternIntact(APDebugBlockHeader: PFastMM_Debug
LFillPatternIntact := False;
end;

{Loop over the remaining 8 byte chunks using a negative offset.}
{Loop over the remaining 32 byte chunks using a negative offset.}
Inc(LPUserArea, LByteOffset);
LByteOffset := - LByteOffset;
while LByteOffset <= -32 do
begin
if (PUInt64(@LPUserArea[LByteOffset])^ <> UInt64($0101010101010101) * CDebugFillByteFreedBlock)
or (PUInt64(@LPUserArea[LByteOffset + 8])^ <> UInt64($0101010101010101) * CDebugFillByteFreedBlock)
or (PUInt64(@LPUserArea[LByteOffset + 16])^ <> UInt64($0101010101010101) * CDebugFillByteFreedBlock)
or (PUInt64(@LPUserArea[LByteOffset + 24])^ <> UInt64($0101010101010101) * CDebugFillByteFreedBlock) then
begin
LFillPatternIntact := False;
Break;
end;

Inc(LByteOffset, 32);
end;

{Loop over the remaining 8 byte chunks.}
while LByteOffset < 0 do
begin
if PUInt64(@LPUserArea[LByteOffset])^ <> UInt64($0101010101010101) * CDebugFillByteFreedBlock then
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