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/* -*- 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/. */
#include "gfxCrashReporterUtils.h"
#include <string.h> // for strcmp
#include "mozilla/SchedulerGroup.h" // for SchedulerGroup
#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 "MainThreadUtils.h" // for NS_IsMainThread
#include "nsCOMPtr.h" // for nsCOMPtr
#include "nsError.h" // for NS_OK, NS_FAILED, nsresult
#include "nsExceptionHandler.h" // for AppendAppNotesToCrashReport
#include "nsIObserver.h" // for nsIObserver, etc
#include "nsIObserverService.h" // for nsIObserverService
#include "nsIRunnable.h" // for nsIRunnable
#include "nsISupports.h"
#include "nsThreadUtils.h" // for Runnable
#include "nsTArray.h" // for nsTArray
#include "nscore.h" // for NS_IMETHOD, NS_IMETHODIMP, etc
namespace mozilla {
static nsTArray<nsCString>* gFeaturesAlreadyReported = nullptr;
static StaticMutex gFeaturesAlreadyReportedMutex MOZ_UNANNOTATED;
class ObserverToDestroyFeaturesAlreadyReported final : public nsIObserver {
public:
NS_DECL_ISUPPORTS
NS_DECL_NSIOBSERVER
ObserverToDestroyFeaturesAlreadyReported() = default;
private:
virtual ~ObserverToDestroyFeaturesAlreadyReported() = default;
};
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:
RegisterObserverRunnable() : Runnable("RegisterObserverRunnable") {}
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 Runnable {
public:
explicit AppendAppNotesRunnable(const nsACString& aFeatureStr)
: Runnable("AppendAppNotesRunnable"), mFeatureString(aFeatureStr) {}
NS_IMETHOD Run() override {
CrashReporter::AppendAppNotesToCrashReport(mFeatureString);
return NS_OK;
}
private:
nsAutoCString mFeatureString;
};
void ScopedGfxFeatureReporter::WriteAppNote(char statusChar,
int32_t statusNumber) {
StaticMutexAutoLock al(gFeaturesAlreadyReportedMutex);
if (!gFeaturesAlreadyReported) {
gFeaturesAlreadyReported = new nsTArray<nsCString>;
nsCOMPtr<nsIRunnable> r = new RegisterObserverRunnable();
SchedulerGroup::Dispatch(r.forget());
}
nsAutoCString featureString;
if (statusNumber == 0) {
featureString.AppendPrintf("%s%c ", mFeature, statusChar);
} else {
featureString.AppendPrintf("%s%c%d ", mFeature, statusChar, statusNumber);
}
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.forget());
}
}
} // end namespace mozilla
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