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event_data::blank redefined to prevent confusion with NULL values causing premature varadic argument termination leading to incomplete event data

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This commit is contained in:
Simon Rozman 2016-10-25 13:01:47 +02:00
parent 0fcfe95e84
commit ce1bc5951e
1 changed files with 8 additions and 4 deletions
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12
include/WinStd/ETW.h
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@ -126,7 +126,7 @@ namespace winstd
{
Ptr = 0;
Size = 0;
Reserved = 0;
Reserved = (ULONG)-1; // Used for varadic argument terminator.
}
@ -215,7 +215,7 @@ namespace winstd
///
/// \note This class is saves a reference to the data only. Therefore, data must be kept available.
///
inline event_data(_In_bytecount_(size) const void *data, ULONG size)
inline event_data(_In_bytecount_(size) const void *data, _In_ ULONG size)
{
EventDataDescCreate(this, data, size);
}
@ -478,7 +478,9 @@ namespace winstd
// Preallocate array.
for (param_count = 0;; param_count++) {
const EVENT_DATA_DESCRIPTOR &p = va_arg(arg, const EVENT_DATA_DESCRIPTOR);
if (!p.Ptr) break;
if (p.Ptr == winstd::event_data::blank.Ptr &&
p.Size == winstd::event_data::blank.Size &&
p.Reserved == winstd::event_data::blank.Reserved) break;
}
params.reserve(param_count);
@ -486,7 +488,9 @@ namespace winstd
arg = arg_start;
for (;;) {
const EVENT_DATA_DESCRIPTOR &p = va_arg(arg, const EVENT_DATA_DESCRIPTOR);
if (!p.Ptr) break;
if (p.Ptr == winstd::event_data::blank.Ptr &&
p.Size == winstd::event_data::blank.Size &&
p.Reserved == winstd::event_data::blank.Reserved) break;
params.push_back(p);
}