/usr/include/thunderbird/DriverCrashGuard.h is in thunderbird-dev 1:52.8.0-1~deb8u1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 | /* -*- 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/. */
#ifndef gfx_src_DriverCrashGuard_h__
#define gfx_src_DriverCrashGuard_h__
#include "nsCOMPtr.h"
#include "nsIGfxInfo.h"
#include "nsIFile.h"
#include "nsString.h"
#include "mozilla/Function.h"
#include <string>
namespace mozilla {
namespace dom {
class ContentParent;
} // namespace dom
namespace gfx {
enum class DriverInitStatus
{
// Drivers have not been initialized yet.
Unknown,
// We're attempting to initialize drivers.
Attempting,
// Drivers were successfully initialized last run.
Okay,
// We crashed during driver initialization, and have restarted.
Crashed
};
enum class CrashGuardType : uint32_t
{
D3D11Layers,
D3D9Video,
GLContext,
D3D11Video,
// Add new entries above this line, update the name array in
// DriverCrashGuard.cpp, and make sure to add an entry in
// ContentParent.cpp.
NUM_TYPES
};
// DriverCrashGuard is used to detect crashes at graphics driver callsites.
//
// If the graphics environment is unrecognized or has changed since the last
// session, the crash guard will activate and will detect any crashes within
// the scope of the guard object.
//
// If a callsite has a previously encountered crash, and the environment has
// not changed since the last session, then the guard will set a status flag
// indicating that the driver should not be used.
class DriverCrashGuard
{
public:
DriverCrashGuard(CrashGuardType aType, dom::ContentParent* aContentParent);
virtual ~DriverCrashGuard();
bool Crashed();
void NotifyCrashed();
// These are the values reported to Telemetry (GRAPHICS_DRIVER_STARTUP_TEST).
// Values should not change; add new values to the end.
enum class TelemetryState {
Okay = 0,
EnvironmentChanged = 1,
RecoveredFromCrash = 2,
FeatureDisabled = 3
};
enum class Mode {
// Normal operation.
Normal,
// Acting as a proxy between the parent and child process.
Proxy
};
typedef mozilla::function<void(const char* aName, const char* aPrefName)>
CrashGuardCallback;
static void ForEachActiveCrashGuard(const CrashGuardCallback& aCallback);
protected:
virtual void Initialize();
virtual bool UpdateEnvironment() = 0;
virtual void LogCrashRecovery() = 0;
virtual void LogFeatureDisabled() = 0;
// Helper functions.
bool FeatureEnabled(int aFeature, bool aDefault=true);
bool CheckAndUpdatePref(const char* aPrefName, const nsAString& aCurrentValue);
bool CheckAndUpdateBoolPref(const char* aPrefName, bool aCurrentValue);
std::string GetFullPrefName(const char* aPref);
private:
// Either process.
void InitializeIfNeeded();
bool CheckOrRefreshEnvironment();
bool UpdateBaseEnvironment();
DriverInitStatus GetStatus() const;
// Parent process only.
nsCOMPtr<nsIFile> GetGuardFile();
bool RecoverFromCrash();
void ActivateGuard();
void FlushPreferences();
void SetStatus(DriverInitStatus aStatus);
private:
CrashGuardType mType;
Mode mMode;
bool mInitialized;
bool mGuardActivated;
bool mCrashDetected;
nsCOMPtr<nsIFile> mGuardFile;
protected:
nsCString mStatusPref;
nsCOMPtr<nsIGfxInfo> mGfxInfo;
};
class D3D11LayersCrashGuard final : public DriverCrashGuard
{
public:
explicit D3D11LayersCrashGuard(dom::ContentParent* aContentParent = nullptr);
protected:
void Initialize() override;
bool UpdateEnvironment() override;
void LogCrashRecovery() override;
void LogFeatureDisabled() override;
private:
void RecordTelemetry(TelemetryState aState);
};
class D3D9VideoCrashGuard final : public DriverCrashGuard
{
public:
explicit D3D9VideoCrashGuard(dom::ContentParent* aContentParent = nullptr);
protected:
bool UpdateEnvironment() override;
void LogCrashRecovery() override;
void LogFeatureDisabled() override;
};
class D3D11VideoCrashGuard final : public DriverCrashGuard
{
public:
explicit D3D11VideoCrashGuard(dom::ContentParent* aContentParent = nullptr);
protected:
bool UpdateEnvironment() override;
void LogCrashRecovery() override;
void LogFeatureDisabled() override;
};
class GLContextCrashGuard final : public DriverCrashGuard
{
public:
explicit GLContextCrashGuard(dom::ContentParent* aContentParent = nullptr);
void Initialize() override;
protected:
bool UpdateEnvironment() override;
void LogCrashRecovery() override;
void LogFeatureDisabled() override;
};
} // namespace gfx
} // namespace mozilla
#endif // gfx_src_DriverCrashGuard_h__
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