mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-12-08 05:52:32 +00:00
e5e885ae31
# ignore-this-changeset --HG-- extra : amend_source : 7221c8d15a765df71171099468e7c7faa648f37c extra : histedit_source : a0cce6015636202bff09e35a13f72e03257a7695
217 lines
6.7 KiB
C++
217 lines
6.7 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
/*****************************
|
|
Windows implementation of probes, using xperf
|
|
*****************************/
|
|
#include <windows.h>
|
|
#include <wmistr.h>
|
|
#include <evntrace.h>
|
|
|
|
#include "perfprobe.h"
|
|
#include "nsAutoPtr.h"
|
|
|
|
namespace mozilla {
|
|
namespace probes {
|
|
|
|
#if defined(MOZ_LOGGING)
|
|
static LazyLogModule sProbeLog("SysProbe");
|
|
# define LOG(x) MOZ_LOG(sProbeLog, mozilla::LogLevel::Debug, x)
|
|
#else
|
|
# define LOG(x)
|
|
#endif
|
|
|
|
// Utility function
|
|
GUID CID_to_GUID(const nsCID& aCID) {
|
|
GUID result;
|
|
result.Data1 = aCID.m0;
|
|
result.Data2 = aCID.m1;
|
|
result.Data3 = aCID.m2;
|
|
for (int i = 0; i < 8; ++i) {
|
|
result.Data4[i] = aCID.m3[i];
|
|
}
|
|
return result;
|
|
}
|
|
|
|
// Implementation of Probe
|
|
|
|
Probe::Probe(const nsCID& aGUID, const nsACString& aName,
|
|
ProbeManager* aManager)
|
|
: mGUID(CID_to_GUID(aGUID)), mName(aName), mManager(aManager) {}
|
|
|
|
nsresult Probe::Trigger() {
|
|
if (!(mManager->mIsActive)) {
|
|
// Do not trigger if there is no session
|
|
return NS_OK;
|
|
}
|
|
|
|
_EVENT_TRACE_HEADER event;
|
|
ZeroMemory(&event, sizeof(event));
|
|
event.Size = sizeof(event);
|
|
event.Flags = WNODE_FLAG_TRACED_GUID;
|
|
event.Guid = (const GUID)mGUID;
|
|
event.Class.Type = 1;
|
|
event.Class.Version = 0;
|
|
event.Class.Level = TRACE_LEVEL_INFORMATION;
|
|
|
|
ULONG result = TraceEvent(mManager->mSessionHandle, &event);
|
|
|
|
LOG(("Probes: Triggered %s, %s, %ld", mName.Data(),
|
|
result == ERROR_SUCCESS ? "success" : "failure", result));
|
|
|
|
nsresult rv;
|
|
switch (result) {
|
|
case ERROR_SUCCESS:
|
|
rv = NS_OK;
|
|
break;
|
|
case ERROR_INVALID_FLAG_NUMBER:
|
|
case ERROR_MORE_DATA:
|
|
case ERROR_INVALID_PARAMETER:
|
|
rv = NS_ERROR_INVALID_ARG;
|
|
break;
|
|
case ERROR_INVALID_HANDLE:
|
|
rv = NS_ERROR_FAILURE;
|
|
break;
|
|
case ERROR_NOT_ENOUGH_MEMORY:
|
|
case ERROR_OUTOFMEMORY:
|
|
rv = NS_ERROR_OUT_OF_MEMORY;
|
|
break;
|
|
default:
|
|
rv = NS_ERROR_UNEXPECTED;
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
// Implementation of ProbeManager
|
|
|
|
ProbeManager::~ProbeManager() {
|
|
// If the manager goes out of scope, stop the session.
|
|
if (mIsActive && mRegistrationHandle) {
|
|
StopSession();
|
|
}
|
|
}
|
|
|
|
ProbeManager::ProbeManager(const nsCID& aApplicationUID,
|
|
const nsACString& aApplicationName)
|
|
: mIsActive(false),
|
|
mApplicationUID(aApplicationUID),
|
|
mApplicationName(aApplicationName),
|
|
mSessionHandle(0),
|
|
mRegistrationHandle(0),
|
|
mInitialized(false) {
|
|
#if defined(MOZ_LOGGING)
|
|
char cidStr[NSID_LENGTH];
|
|
aApplicationUID.ToProvidedString(cidStr);
|
|
LOG(("ProbeManager::Init for application %s, %s", aApplicationName.Data(),
|
|
cidStr));
|
|
#endif
|
|
}
|
|
|
|
// Note: The Windows API is just a little bit scary there.
|
|
// The only way to obtain the session handle is to
|
|
//- ignore the session handle obtained from RegisterTraceGuids
|
|
//- pass a callback
|
|
//- in that callback, request the session handle through
|
|
// GetTraceLoggerHandle and some opaque value received by the callback
|
|
|
|
ULONG WINAPI ControlCallback(WMIDPREQUESTCODE aRequestCode, PVOID aContext,
|
|
ULONG* aReserved, PVOID aBuffer) {
|
|
ProbeManager* context = (ProbeManager*)aContext;
|
|
switch (aRequestCode) {
|
|
case WMI_ENABLE_EVENTS: {
|
|
context->mIsActive = true;
|
|
TRACEHANDLE sessionHandle = GetTraceLoggerHandle(aBuffer);
|
|
// Note: We only accept one handle
|
|
if ((HANDLE)sessionHandle == INVALID_HANDLE_VALUE) {
|
|
ULONG result = GetLastError();
|
|
LOG(("Probes: ControlCallback failed, %ul", result));
|
|
return result;
|
|
} else if (context->mIsActive && context->mSessionHandle &&
|
|
context->mSessionHandle != sessionHandle) {
|
|
LOG(
|
|
("Probes: Can only handle one context at a time, "
|
|
"ignoring activation"));
|
|
return ERROR_SUCCESS;
|
|
} else {
|
|
context->mSessionHandle = sessionHandle;
|
|
LOG(("Probes: ControlCallback activated"));
|
|
return ERROR_SUCCESS;
|
|
}
|
|
}
|
|
|
|
case WMI_DISABLE_EVENTS:
|
|
context->mIsActive = false;
|
|
context->mSessionHandle = 0;
|
|
LOG(("Probes: ControlCallback deactivated"));
|
|
return ERROR_SUCCESS;
|
|
|
|
default:
|
|
LOG(("Probes: ControlCallback does not know what to do with %d",
|
|
aRequestCode));
|
|
return ERROR_INVALID_PARAMETER;
|
|
}
|
|
}
|
|
|
|
already_AddRefed<Probe> ProbeManager::GetProbe(const nsCID& aEventUID,
|
|
const nsACString& aEventName) {
|
|
RefPtr<Probe> result(new Probe(aEventUID, aEventName, this));
|
|
mAllProbes.AppendElement(result);
|
|
return result.forget();
|
|
}
|
|
|
|
nsresult ProbeManager::StartSession() { return StartSession(mAllProbes); }
|
|
|
|
nsresult ProbeManager::StartSession(nsTArray<RefPtr<Probe>>& aProbes) {
|
|
const size_t probesCount = aProbes.Length();
|
|
_TRACE_GUID_REGISTRATION* probes = new _TRACE_GUID_REGISTRATION[probesCount];
|
|
for (unsigned int i = 0; i < probesCount; ++i) {
|
|
const Probe* probe = aProbes[i];
|
|
const Probe* probeX = static_cast<const Probe*>(probe);
|
|
probes[i].Guid = (LPCGUID)&probeX->mGUID;
|
|
}
|
|
ULONG result =
|
|
RegisterTraceGuids(&ControlCallback
|
|
/*RequestAddress: Sets mSessions appropriately.*/,
|
|
this
|
|
/*RequestContext: Passed to ControlCallback*/,
|
|
(LPGUID)&mApplicationUID
|
|
/*ControlGuid: Tracing GUID
|
|
the cast comes from MSDN examples*/
|
|
,
|
|
probesCount
|
|
/*GuidCount: Number of probes*/,
|
|
probes
|
|
/*TraceGuidReg: Probes registration*/,
|
|
nullptr
|
|
/*MofImagePath: Must be nullptr, says MSDN*/,
|
|
nullptr
|
|
/*MofResourceName:Must be nullptr, says MSDN*/,
|
|
&mRegistrationHandle
|
|
/*RegistrationHandle: Handler.
|
|
used only for unregistration*/
|
|
);
|
|
delete[] probes;
|
|
if (NS_WARN_IF(result != ERROR_SUCCESS)) {
|
|
return NS_ERROR_UNEXPECTED;
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult ProbeManager::StopSession() {
|
|
LOG(("Probes: Stopping measures"));
|
|
if (mSessionHandle != 0) {
|
|
ULONG result = UnregisterTraceGuids(mSessionHandle);
|
|
mSessionHandle = 0;
|
|
if (result != ERROR_SUCCESS) {
|
|
return NS_ERROR_INVALID_ARG;
|
|
}
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
} // namespace probes
|
|
} // namespace mozilla
|