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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
#include "common.h"
#include "eventpipeevent.h"
#include "eventpipeprovider.h"
#ifdef FEATURE_PERFTRACING
EventPipeEvent::EventPipeEvent(EventPipeProvider &provider, INT64 keywords, unsigned int eventID, unsigned int eventVersion, EventPipeEventLevel level, bool needStack, BYTE *pMetadata, unsigned int metadataLength)
{
CONTRACTL
{
THROWS;
GC_NOTRIGGER;
MODE_ANY;
}
CONTRACTL_END;
m_pProvider = &provider;
m_keywords = keywords;
m_eventID = eventID;
m_eventVersion = eventVersion;
m_level = level;
m_needStack = needStack;
m_enabled = false;
if (pMetadata != NULL)
{
m_pMetadata = new BYTE[metadataLength];
memcpy(m_pMetadata, pMetadata, metadataLength);
m_metadataLength = metadataLength;
}
else
{
// if metadata is not provided, we have to build the minimum version. It's required by the serialization contract
m_pMetadata = BuildMinimumMetadata();
m_metadataLength = GetMinimumMetadataLength();
}
}
EventPipeEvent::~EventPipeEvent()
{
CONTRACTL
{
NOTHROW;
GC_NOTRIGGER;
MODE_ANY;
}
CONTRACTL_END;
if (m_pMetadata != NULL)
{
delete[] m_pMetadata;
m_pMetadata = NULL;
}
}
unsigned int EventPipeEvent::GetMinimumMetadataLength()
{
LIMITED_METHOD_CONTRACT;
unsigned int minimumMetadataLength =
sizeof(m_eventID) +
(SString::Empty().GetCount() + 1) * sizeof(WCHAR) + // size of empty unicode string
sizeof(m_keywords) +
sizeof(m_eventVersion) +
sizeof(m_level) +
sizeof(unsigned int); // parameter count
return minimumMetadataLength;
}
BYTE *EventPipeEvent::BuildMinimumMetadata()
{
CONTRACTL
{
THROWS;
GC_NOTRIGGER;
MODE_ANY;
}
CONTRACTL_END;
unsigned int minmumMetadataLength = GetMinimumMetadataLength();
BYTE *minmumMetadata = new BYTE[minmumMetadataLength];
BYTE *currentPtr = minmumMetadata;
// the order of fields is defined in coreclr\src\mscorlib\shared\System\Diagnostics\Tracing\EventSource.cs DefineEventPipeEvents method
memcpy(currentPtr, &m_eventID, sizeof(m_eventID));
currentPtr += sizeof(m_eventID);
SString eventName = SString::Empty();
unsigned int eventNameSize = (eventName.GetCount() + 1) * sizeof(WCHAR);
memcpy(currentPtr, (BYTE*)eventName.GetUnicode(), eventNameSize);
currentPtr += eventNameSize;
memcpy(currentPtr, &m_keywords, sizeof(m_keywords));
currentPtr += sizeof(m_keywords);
memcpy(currentPtr, &m_eventVersion, sizeof(m_eventVersion));
currentPtr += sizeof(m_eventVersion);
memcpy(currentPtr, &m_level, sizeof(m_level));
currentPtr += sizeof(m_level);
unsigned int noParameters = 0;
memcpy(currentPtr, &noParameters, sizeof(noParameters));
currentPtr += sizeof(noParameters);
return minmumMetadata;
}
EventPipeProvider* EventPipeEvent::GetProvider() const
{
LIMITED_METHOD_CONTRACT;
return m_pProvider;
}
INT64 EventPipeEvent::GetKeywords() const
{
LIMITED_METHOD_CONTRACT;
return m_keywords;
}
unsigned int EventPipeEvent::GetEventID() const
{
LIMITED_METHOD_CONTRACT;
return m_eventID;
}
unsigned int EventPipeEvent::GetEventVersion() const
{
LIMITED_METHOD_CONTRACT;
return m_eventVersion;
}
EventPipeEventLevel EventPipeEvent::GetLevel() const
{
LIMITED_METHOD_CONTRACT;
return m_level;
}
bool EventPipeEvent::NeedStack() const
{
LIMITED_METHOD_CONTRACT;
return m_needStack;
}
bool EventPipeEvent::IsEnabled() const
{
LIMITED_METHOD_CONTRACT;
return m_enabled;
}
BYTE *EventPipeEvent::GetMetadata() const
{
LIMITED_METHOD_CONTRACT;
return m_pMetadata;
}
unsigned int EventPipeEvent::GetMetadataLength() const
{
LIMITED_METHOD_CONTRACT;
return m_metadataLength;
}
void EventPipeEvent::RefreshState()
{
LIMITED_METHOD_CONTRACT;
m_enabled = m_pProvider->EventEnabled(m_keywords, m_level);
}
#endif // FEATURE_PERFTRACING
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