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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/. */
#include "gfxCrashReporterUtils.h"
#ifdef MOZ_GFXFEATUREREPORTER
#include "gfxCrashReporterUtils.h"
#include <string.h> // for strcmp
#include "mozilla/Assertions.h" // for MOZ_ASSERT_HELPER2
#include "mozilla/Services.h" // for GetObserverService
#include "mozilla/StaticMutex.h"
#include "mozilla/mozalloc.h" // for operator new, etc
#include "mozilla/RefPtr.h" // for RefPtr
#include "nsCOMPtr.h" // for nsCOMPtr
#include "nsError.h" // for NS_OK, NS_FAILED, nsresult
#include "nsExceptionHandler.h" // for AppendAppNotesToCrashReport
#include "nsID.h"
#include "nsIEventTarget.h" // for NS_DISPATCH_NORMAL
#include "nsIObserver.h" // for nsIObserver, etc
#include "nsIObserverService.h" // for nsIObserverService
#include "nsIRunnable.h" // for nsIRunnable
#include "nsISupports.h"
#include "nsTArray.h" // for nsTArray
#include "nsThreadUtils.h" // for NS_DispatchToMainThread, etc
#include "nscore.h" // for NS_IMETHOD, NS_IMETHODIMP, etc
namespace mozilla {
static nsTArray<nsCString> *gFeaturesAlreadyReported = nullptr;
static StaticMutex gFeaturesAlreadyReportedMutex;
class ObserverToDestroyFeaturesAlreadyReported final : public nsIObserver
{
public:
NS_DECL_ISUPPORTS
NS_DECL_NSIOBSERVER
ObserverToDestroyFeaturesAlreadyReported() {}
private:
virtual ~ObserverToDestroyFeaturesAlreadyReported() {}
};
NS_IMPL_ISUPPORTS(ObserverToDestroyFeaturesAlreadyReported,
nsIObserver)
NS_IMETHODIMP
ObserverToDestroyFeaturesAlreadyReported::Observe(nsISupports* aSubject,
const char* aTopic,
const char16_t* aData)
{
if (!strcmp(aTopic, "xpcom-shutdown")) {
StaticMutexAutoLock al(gFeaturesAlreadyReportedMutex);
if (gFeaturesAlreadyReported) {
delete gFeaturesAlreadyReported;
gFeaturesAlreadyReported = nullptr;
}
}
return NS_OK;
}
class RegisterObserverRunnable : public Runnable {
public:
NS_IMETHOD Run() override {
// LeakLog made me do this. Basically, I just wanted gFeaturesAlreadyReported to be a static nsTArray<nsCString>,
// and LeakLog was complaining about leaks like this:
// leaked 1 instance of nsTArray_base with size 8 bytes
// leaked 7 instances of nsStringBuffer with size 8 bytes each (56 bytes total)
// So this is a work-around using a pointer, and using a nsIObserver to deallocate on xpcom shutdown.
// Yay for fighting bloat.
nsCOMPtr<nsIObserverService> observerService = mozilla::services::GetObserverService();
if (!observerService)
return NS_OK;
RefPtr<ObserverToDestroyFeaturesAlreadyReported> observer = new ObserverToDestroyFeaturesAlreadyReported;
observerService->AddObserver(observer, "xpcom-shutdown", false);
return NS_OK;
}
};
class AppendAppNotesRunnable : public CancelableRunnable {
public:
explicit AppendAppNotesRunnable(const nsACString& aFeatureStr)
: mFeatureString(aFeatureStr)
{
}
NS_IMETHOD Run() override {
CrashReporter::AppendAppNotesToCrashReport(mFeatureString);
return NS_OK;
}
private:
nsAutoCString mFeatureString;
};
void
ScopedGfxFeatureReporter::WriteAppNote(char statusChar)
{
StaticMutexAutoLock al(gFeaturesAlreadyReportedMutex);
if (!gFeaturesAlreadyReported) {
gFeaturesAlreadyReported = new nsTArray<nsCString>;
nsCOMPtr<nsIRunnable> r = new RegisterObserverRunnable();
NS_DispatchToMainThread(r);
}
nsAutoCString featureString;
featureString.AppendPrintf("%s%c ",
mFeature,
statusChar);
if (!gFeaturesAlreadyReported->Contains(featureString)) {
gFeaturesAlreadyReported->AppendElement(featureString);
AppNote(featureString);
}
}
void
ScopedGfxFeatureReporter::AppNote(const nsACString& aMessage)
{
if (NS_IsMainThread()) {
CrashReporter::AppendAppNotesToCrashReport(aMessage);
} else {
nsCOMPtr<nsIRunnable> r = new AppendAppNotesRunnable(aMessage);
NS_DispatchToMainThread(r);
}
}
} // end namespace mozilla
#else
namespace mozilla {
void ScopedGfxFeatureReporter::WriteAppNote(char) {}
void ScopedGfxFeatureReporter::AppNote(const nsACString&) {}
} // namespace mozilla
#endif
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