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Zero-length event property data retrieval fixed

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This commit is contained in:
Simon Rozman 2016-10-25 13:32:56 +02:00
parent ce1bc5951e
commit 3872ddb465
1 changed files with 8 additions and 3 deletions
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5
include/WinStd/ETW.h
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@ -1114,9 +1114,14 @@ inline ULONG TdhGetProperty(_In_ PEVENT_RECORD pEvent, _In_ ULONG TdhContextCoun
// Query property size. // Query property size.
ulResult = TdhGetPropertySize(pEvent, TdhContextCount, pTdhContext, PropertyDataCount, pPropertyData, &ulSize); ulResult = TdhGetPropertySize(pEvent, TdhContextCount, pTdhContext, PropertyDataCount, pPropertyData, &ulSize);
if (ulResult == ERROR_SUCCESS) { if (ulResult == ERROR_SUCCESS) {
if (ulSize) {
// Query property value. // Query property value.
aData.resize((ulSize + sizeof(_Ty) - 1) / sizeof(_Ty)); aData.resize((ulSize + sizeof(_Ty) - 1) / sizeof(_Ty));
ulResult = TdhGetProperty(pEvent, TdhContextCount, pTdhContext, PropertyDataCount, pPropertyData, ulSize, reinterpret_cast<LPBYTE>(aData.data())); ulResult = TdhGetProperty(pEvent, TdhContextCount, pTdhContext, PropertyDataCount, pPropertyData, ulSize, reinterpret_cast<LPBYTE>(aData.data()));
} else {
// Property value size is zero.
aData.clear();
}
} }
return ulResult; return ulResult;