The Tor Browser: widget/xpwidgets/GfxInfoX11.cpp@44a2da4a2ab2 (annotated)

widget/xpwidgets/GfxInfoX11.cpp@44a2da4a2ab2 (annotated)

widget/xpwidgets/GfxInfoX11.cpp

Fri, 16 Jan 2015 04:50:19 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Fri, 16 Jan 2015 04:50:19 +0100
branch: TOR_BUG_9701
changeset 13: 44a2da4a2ab2
permissions: -rw-r--r--

Replace accessor implementation with direct member state manipulation, by
request https://trac.torproject.org/projects/tor/ticket/9701#comment:32

 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
  * vim: sw=2 ts=8 et :
  */
 /* 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 <unistd.h>
 #include <sys/types.h>
 #include <sys/wait.h>
 #include <errno.h>
 #include <sys/utsname.h>
 #include "nsCRTGlue.h"
 #include "prenv.h"
 #include "GfxInfoX11.h"
 #ifdef MOZ_CRASHREPORTER
 #include "nsExceptionHandler.h"
 #include "nsICrashReporter.h"
 #endif
 namespace mozilla {
 namespace widget {
 #ifdef DEBUG
 NS_IMPL_ISUPPORTS_INHERITED(GfxInfo, GfxInfoBase, nsIGfxInfoDebug)
 #endif
 // these global variables will be set when firing the glxtest process
 int glxtest_pipe = 0;
 pid_t glxtest_pid = 0;
 nsresult
 GfxInfo::Init()
 {
     mGLMajorVersion = 0;
     mMajorVersion = 0;
     mMinorVersion = 0;
     mRevisionVersion = 0;
     mIsMesa = false;
     mIsNVIDIA = false;
     mIsFGLRX = false;
     mIsNouveau = false;
     mIsIntel = false;
     mIsOldSwrast = false;
     mIsLlvmpipe = false;
     mHasTextureFromPixmap = false;
     return GfxInfoBase::Init();
 }
 void
 GfxInfo::GetData()
 {
     // to understand this function, see bug 639842. We retrieve the OpenGL driver information in a
     // separate process to protect against bad drivers.
     // if glxtest_pipe == 0, that means that we already read the information
     if (!glxtest_pipe)
         return;
     enum { buf_size = 1024 };
     char buf[buf_size];
     ssize_t bytesread = read(glxtest_pipe,
                              &buf,
                              buf_size-1); // -1 because we'll append a zero
     close(glxtest_pipe);
     glxtest_pipe = 0;
     // bytesread < 0 would mean that the above read() call failed.
     // This should never happen. If it did, the outcome would be to blacklist anyway.
     if (bytesread < 0)
         bytesread = 0;
     // let buf be a zero-terminated string
     buf[bytesread] = 0;
     // Wait for the glxtest process to finish. This serves 2 purposes:
     // * avoid having a zombie glxtest process laying around
     // * get the glxtest process status info.
     int glxtest_status = 0;
     bool wait_for_glxtest_process = true;
     bool waiting_for_glxtest_process_failed = false;
     int waitpid_errno = 0;
     while(wait_for_glxtest_process) {
         wait_for_glxtest_process = false;
         if (waitpid(glxtest_pid, &glxtest_status, 0) == -1) {
             waitpid_errno = errno;
             if (waitpid_errno == EINTR) {
                 wait_for_glxtest_process = true;
             } else {
                 // Bug 718629
                 // ECHILD happens when the glxtest process got reaped got reaped after a PR_CreateProcess
                 // as per bug 227246. This shouldn't matter, as we still seem to get the data
                 // from the pipe, and if we didn't, the outcome would be to blacklist anyway.
                 waiting_for_glxtest_process_failed = (waitpid_errno != ECHILD);
             }
         }
     }
     bool exited_with_error_code = !waiting_for_glxtest_process_failed &&
                                   WIFEXITED(glxtest_status) &&
                                   WEXITSTATUS(glxtest_status) != EXIT_SUCCESS;
     bool received_signal = !waiting_for_glxtest_process_failed &&
                            WIFSIGNALED(glxtest_status);
     bool error = waiting_for_glxtest_process_failed || exited_with_error_code || received_signal;
     nsCString textureFromPixmap;
     nsCString *stringToFill = nullptr;
     char *bufptr = buf;
     if (!error) {
         while(true) {
             char *line = NS_strtok("\n", &bufptr);
             if (!line)
                 break;
             if (stringToFill) {
                 stringToFill->Assign(line);
                 stringToFill = nullptr;
             }
             else if(!strcmp(line, "VENDOR"))
                 stringToFill = &mVendor;
             else if(!strcmp(line, "RENDERER"))
                 stringToFill = &mRenderer;
             else if(!strcmp(line, "VERSION"))
                 stringToFill = &mVersion;
             else if(!strcmp(line, "TFP"))
                 stringToFill = &textureFromPixmap;
         }
     }
     if (!strcmp(textureFromPixmap.get(), "TRUE"))
         mHasTextureFromPixmap = true;
     // only useful for Linux kernel version check for FGLRX driver.
     // assumes X client == X server, which is sad.
     struct utsname unameobj;
     if (!uname(&unameobj))
     {
       mOS.Assign(unameobj.sysname);
       mOSRelease.Assign(unameobj.release);
     }
     const char *spoofedVendor = PR_GetEnv("MOZ_GFX_SPOOF_GL_VENDOR");
     if (spoofedVendor)
         mVendor.Assign(spoofedVendor);
     const char *spoofedRenderer = PR_GetEnv("MOZ_GFX_SPOOF_GL_RENDERER");
     if (spoofedRenderer)
         mRenderer.Assign(spoofedRenderer);
     const char *spoofedVersion = PR_GetEnv("MOZ_GFX_SPOOF_GL_VERSION");
     if (spoofedVersion)
         mVersion.Assign(spoofedVersion);
     const char *spoofedOS = PR_GetEnv("MOZ_GFX_SPOOF_OS");
     if (spoofedOS)
         mOS.Assign(spoofedOS);
     const char *spoofedOSRelease = PR_GetEnv("MOZ_GFX_SPOOF_OS_RELEASE");
     if (spoofedOSRelease)
         mOSRelease.Assign(spoofedOSRelease);
     if (error ||
         mVendor.IsEmpty() ||
         mRenderer.IsEmpty() ||
         mVersion.IsEmpty() ||
         mOS.IsEmpty() ||
         mOSRelease.IsEmpty())
     {
         mAdapterDescription.AppendLiteral("GLXtest process failed");
         if (waiting_for_glxtest_process_failed)
             mAdapterDescription.AppendPrintf(" (waitpid failed with errno=%d for pid %d)", waitpid_errno, glxtest_pid);
         if (exited_with_error_code)
             mAdapterDescription.AppendPrintf(" (exited with status %d)", WEXITSTATUS(glxtest_status));
         if (received_signal)
             mAdapterDescription.AppendPrintf(" (received signal %d)", WTERMSIG(glxtest_status));
         if (bytesread) {
             mAdapterDescription.AppendLiteral(": ");
             mAdapterDescription.Append(nsDependentCString(buf));
             mAdapterDescription.AppendLiteral("\n");
         }
 #ifdef MOZ_CRASHREPORTER
         CrashReporter::AppendAppNotesToCrashReport(mAdapterDescription);
 #endif
         return;
     }
     mAdapterDescription.Append(mVendor);
     mAdapterDescription.AppendLiteral(" -- ");
     mAdapterDescription.Append(mRenderer);
     nsAutoCString note;
     note.Append("OpenGL: ");
     note.Append(mAdapterDescription);
     note.Append(" -- ");
     note.Append(mVersion);
     if (mHasTextureFromPixmap)
         note.Append(" -- texture_from_pixmap");
     note.Append("\n");
 #ifdef MOZ_CRASHREPORTER
     CrashReporter::AppendAppNotesToCrashReport(note);
 #endif
     // determine the major OpenGL version. That's the first integer in the version string.
     mGLMajorVersion = strtol(mVersion.get(), 0, 10);
     // determine driver type (vendor) and where in the version string
     // the actual driver version numbers should be expected to be found (whereToReadVersionNumbers)
     const char *whereToReadVersionNumbers = nullptr;
     const char *Mesa_in_version_string = strstr(mVersion.get(), "Mesa");
     if (Mesa_in_version_string) {
         mIsMesa = true;
         // with Mesa, the version string contains "Mesa major.minor" and that's all the version information we get:
         // there is no actual driver version info.
         whereToReadVersionNumbers = Mesa_in_version_string + strlen("Mesa");
         if (strcasestr(mVendor.get(), "nouveau"))
             mIsNouveau = true;
         if (strcasestr(mRenderer.get(), "intel")) // yes, intel is in the renderer string
             mIsIntel = true;
         if (strcasestr(mRenderer.get(), "llvmpipe"))
             mIsLlvmpipe = true;
         if (strcasestr(mRenderer.get(), "software rasterizer"))
             mIsOldSwrast = true;
     } else if (strstr(mVendor.get(), "NVIDIA Corporation")) {
         mIsNVIDIA = true;
         // with the NVIDIA driver, the version string contains "NVIDIA major.minor"
         // note that here the vendor and version strings behave differently, that's why we don't put this above
         // alongside Mesa_in_version_string.
         const char *NVIDIA_in_version_string = strstr(mVersion.get(), "NVIDIA");
         if (NVIDIA_in_version_string)
             whereToReadVersionNumbers = NVIDIA_in_version_string + strlen("NVIDIA");
     } else if (strstr(mVendor.get(), "ATI Technologies Inc")) {
         mIsFGLRX = true;
         // with the FGLRX driver, the version string only gives a OpenGL version :/ so let's return that.
         // that can at least give a rough idea of how old the driver is.
         whereToReadVersionNumbers = mVersion.get();
     }
     // read major.minor version numbers of the driver (not to be confused with the OpenGL version)
     if (whereToReadVersionNumbers) {
         // copy into writable buffer, for tokenization
         strncpy(buf, whereToReadVersionNumbers, buf_size);
         bufptr = buf;
         // now try to read major.minor version numbers. In case of failure, gracefully exit: these numbers have
         // been initialized as 0 anyways
         char *token = NS_strtok(".", &bufptr);
         if (token) {
             mMajorVersion = strtol(token, 0, 10);
             token = NS_strtok(".", &bufptr);
             if (token) {
                 mMinorVersion = strtol(token, 0, 10);
                 token = NS_strtok(".", &bufptr);
                 if (token)
                     mRevisionVersion = strtol(token, 0, 10);
             }
         }
     }
 }
 static inline uint64_t version(uint32_t major, uint32_t minor, uint32_t revision = 0)
 {
     return (uint64_t(major) << 32) + (uint64_t(minor) << 16) + uint64_t(revision);
 }
 const nsTArray<GfxDriverInfo>&
 GfxInfo::GetGfxDriverInfo()
 {
   // Nothing here yet.
   //if (!mDriverInfo->Length()) {
   //
   //}
   return *mDriverInfo;
 }
 nsresult
 GfxInfo::GetFeatureStatusImpl(int32_t aFeature,
                               int32_t *aStatus,
                               nsAString & aSuggestedDriverVersion,
                               const nsTArray<GfxDriverInfo>& aDriverInfo,
                               OperatingSystem* aOS /* = nullptr */)
 {
   GetData();
   NS_ENSURE_ARG_POINTER(aStatus);
   *aStatus = nsIGfxInfo::FEATURE_STATUS_UNKNOWN;
   aSuggestedDriverVersion.SetIsVoid(true);
   OperatingSystem os = DRIVER_OS_LINUX;
   if (aOS)
     *aOS = os;
   if (mGLMajorVersion == 1) {
     // We're on OpenGL 1. In most cases that indicates really old hardware.
     // We better block them, rather than rely on them to fail gracefully, because they don't!
     // see bug 696636
     *aStatus = nsIGfxInfo::FEATURE_BLOCKED_DEVICE;
     return NS_OK;
   }
   // Don't evaluate any special cases if we're checking the downloaded blocklist.
   if (!aDriverInfo.Length()) {
     // Only check features relevant to Linux.
     if (aFeature == nsIGfxInfo::FEATURE_OPENGL_LAYERS ||
         aFeature == nsIGfxInfo::FEATURE_WEBGL_OPENGL ||
         aFeature == nsIGfxInfo::FEATURE_WEBGL_MSAA) {
       // Disable OpenGL layers when we don't have texture_from_pixmap because it regresses performance.
       if (aFeature == nsIGfxInfo::FEATURE_OPENGL_LAYERS && !mHasTextureFromPixmap) {
         *aStatus = nsIGfxInfo::FEATURE_BLOCKED_DRIVER_VERSION;
         aSuggestedDriverVersion.AssignLiteral("<Anything with EXT_texture_from_pixmap support>");
         return NS_OK;
       }
       // whitelist the linux test slaves' current configuration.
       // this is necessary as they're still using the slightly outdated 190.42 driver.
       // this isn't a huge risk, as at least this is the exact setting in which we do continuous testing,
       // and this only affects GeForce 9400 cards on linux on this precise driver version, which is very few users.
       // We do the same thing on Windows XP, see in widget/windows/GfxInfo.cpp
       if (mIsNVIDIA &&
           !strcmp(mRenderer.get(), "GeForce 9400/PCI/SSE2") &&
           !strcmp(mVersion.get(), "3.2.0 NVIDIA 190.42"))
       {
         *aStatus = nsIGfxInfo::FEATURE_NO_INFO;
         return NS_OK;
       }
       if (mIsMesa) {
         if (mIsNouveau && version(mMajorVersion, mMinorVersion) < version(8,0)) {
           *aStatus = nsIGfxInfo::FEATURE_BLOCKED_DRIVER_VERSION;
           aSuggestedDriverVersion.AssignLiteral("Mesa 8.0");
         }
         else if (version(mMajorVersion, mMinorVersion, mRevisionVersion) < version(7,10,3)) {
           *aStatus = nsIGfxInfo::FEATURE_BLOCKED_DRIVER_VERSION;
           aSuggestedDriverVersion.AssignLiteral("Mesa 7.10.3");
         }
         else if (mIsOldSwrast) {
           *aStatus = nsIGfxInfo::FEATURE_BLOCKED_DRIVER_VERSION;
         }
         else if (mIsLlvmpipe && version(mMajorVersion, mMinorVersion) < version(9, 1)) {
           // bug 791905, Mesa bug 57733, fixed in Mesa 9.1 according to
           // https://bugs.freedesktop.org/show_bug.cgi?id=57733#c3
           *aStatus = nsIGfxInfo::FEATURE_BLOCKED_DRIVER_VERSION;
         }
         else if (aFeature == nsIGfxInfo::FEATURE_WEBGL_MSAA)
         {
           if (mIsIntel && version(mMajorVersion, mMinorVersion) < version(8,1))
             *aStatus = nsIGfxInfo::FEATURE_BLOCKED_DRIVER_VERSION;
             aSuggestedDriverVersion.AssignLiteral("Mesa 8.1");
         }
       } else if (mIsNVIDIA) {
         if (version(mMajorVersion, mMinorVersion, mRevisionVersion) < version(257,21)) {
           *aStatus = nsIGfxInfo::FEATURE_BLOCKED_DRIVER_VERSION;
           aSuggestedDriverVersion.AssignLiteral("NVIDIA 257.21");
         }
       } else if (mIsFGLRX) {
         // FGLRX does not report a driver version number, so we have the OpenGL version instead.
         // by requiring OpenGL 3, we effectively require recent drivers.
         if (version(mMajorVersion, mMinorVersion, mRevisionVersion) < version(3, 0)) {
           *aStatus = nsIGfxInfo::FEATURE_BLOCKED_DRIVER_VERSION;
           aSuggestedDriverVersion.AssignLiteral("<Something recent>");
         }
         // Bug 724640: FGLRX + Linux 2.6.32 is a crashy combo
         bool unknownOS = mOS.IsEmpty() || mOSRelease.IsEmpty();
         bool badOS = mOS.Find("Linux", true) != -1 &&
                      mOSRelease.Find("2.6.32") != -1;
         if (unknownOS || badOS) {
           *aStatus = nsIGfxInfo::FEATURE_BLOCKED_OS_VERSION;
         }
       } else {
         // like on windows, let's block unknown vendors. Think of virtual machines.
         // Also, this case is hit whenever the GLXtest probe failed to get driver info or crashed.
         *aStatus = nsIGfxInfo::FEATURE_BLOCKED_DEVICE;
       }
     }
   }
   return GfxInfoBase::GetFeatureStatusImpl(aFeature, aStatus, aSuggestedDriverVersion, aDriverInfo, &os);
 }
 NS_IMETHODIMP
 GfxInfo::GetD2DEnabled(bool *aEnabled)
 {
   return NS_ERROR_FAILURE;
 }
 NS_IMETHODIMP
 GfxInfo::GetDWriteEnabled(bool *aEnabled)
 {
   return NS_ERROR_FAILURE;
 }
 /* readonly attribute DOMString DWriteVersion; */
 NS_IMETHODIMP
 GfxInfo::GetDWriteVersion(nsAString & aDwriteVersion)
 {
   return NS_ERROR_FAILURE;
 }
 /* readonly attribute DOMString cleartypeParameters; */
 NS_IMETHODIMP
 GfxInfo::GetCleartypeParameters(nsAString & aCleartypeParams)
 {
   return NS_ERROR_FAILURE;
 }
 /* readonly attribute DOMString adapterDescription; */
 NS_IMETHODIMP
 GfxInfo::GetAdapterDescription(nsAString & aAdapterDescription)
 {
   GetData();
   AppendASCIItoUTF16(mAdapterDescription, aAdapterDescription);
   return NS_OK;
 }
 /* readonly attribute DOMString adapterDescription2; */
 NS_IMETHODIMP
 GfxInfo::GetAdapterDescription2(nsAString & aAdapterDescription)
 {
   return NS_ERROR_FAILURE;
 }
 /* readonly attribute DOMString adapterRAM; */
 NS_IMETHODIMP
 GfxInfo::GetAdapterRAM(nsAString & aAdapterRAM)
 {
   aAdapterRAM.AssignLiteral("");
   return NS_OK;
 }
 /* readonly attribute DOMString adapterRAM2; */
 NS_IMETHODIMP
 GfxInfo::GetAdapterRAM2(nsAString & aAdapterRAM)
 {
   return NS_ERROR_FAILURE;
 }
 /* readonly attribute DOMString adapterDriver; */
 NS_IMETHODIMP
 GfxInfo::GetAdapterDriver(nsAString & aAdapterDriver)
 {
   aAdapterDriver.AssignLiteral("");
   return NS_OK;
 }
 /* readonly attribute DOMString adapterDriver2; */
 NS_IMETHODIMP
 GfxInfo::GetAdapterDriver2(nsAString & aAdapterDriver)
 {
   return NS_ERROR_FAILURE;
 }
 /* readonly attribute DOMString adapterDriverVersion; */
 NS_IMETHODIMP
 GfxInfo::GetAdapterDriverVersion(nsAString & aAdapterDriverVersion)
 {
   GetData();
   CopyASCIItoUTF16(mVersion, aAdapterDriverVersion);
   return NS_OK;
 }
 /* readonly attribute DOMString adapterDriverVersion2; */
 NS_IMETHODIMP
 GfxInfo::GetAdapterDriverVersion2(nsAString & aAdapterDriverVersion)
 {
   return NS_ERROR_FAILURE;
 }
 /* readonly attribute DOMString adapterDriverDate; */
 NS_IMETHODIMP
 GfxInfo::GetAdapterDriverDate(nsAString & aAdapterDriverDate)
 {
   aAdapterDriverDate.AssignLiteral("");
   return NS_OK;
 }
 /* readonly attribute DOMString adapterDriverDate2; */
 NS_IMETHODIMP
 GfxInfo::GetAdapterDriverDate2(nsAString & aAdapterDriverDate)
 {
   return NS_ERROR_FAILURE;
 }
 /* readonly attribute DOMString adapterVendorID; */
 NS_IMETHODIMP
 GfxInfo::GetAdapterVendorID(nsAString & aAdapterVendorID)
 {
   GetData();
   CopyUTF8toUTF16(mVendor, aAdapterVendorID);
   return NS_OK;
 }
 /* readonly attribute DOMString adapterVendorID2; */
 NS_IMETHODIMP
 GfxInfo::GetAdapterVendorID2(nsAString & aAdapterVendorID)
 {
   return NS_ERROR_FAILURE;
 }
 /* readonly attribute DOMString adapterDeviceID; */
 NS_IMETHODIMP
 GfxInfo::GetAdapterDeviceID(nsAString & aAdapterDeviceID)
 {
   GetData();
   CopyUTF8toUTF16(mRenderer, aAdapterDeviceID);
   return NS_OK;
 }
 /* readonly attribute DOMString adapterDeviceID2; */
 NS_IMETHODIMP
 GfxInfo::GetAdapterDeviceID2(nsAString & aAdapterDeviceID)
 {
   return NS_ERROR_FAILURE;
 }
 /* readonly attribute boolean isGPU2Active; */
 NS_IMETHODIMP
 GfxInfo::GetIsGPU2Active(bool* aIsGPU2Active)
 {
   return NS_ERROR_FAILURE;
 }
 #ifdef DEBUG
 // Implement nsIGfxInfoDebug
 // We don't support spoofing anything on Linux
 /* void spoofVendorID (in DOMString aVendorID); */
 NS_IMETHODIMP GfxInfo::SpoofVendorID(const nsAString & aVendorID)
 {
   CopyUTF16toUTF8(aVendorID, mVendor);
   return NS_OK;
 }
 /* void spoofDeviceID (in unsigned long aDeviceID); */
 NS_IMETHODIMP GfxInfo::SpoofDeviceID(const nsAString & aDeviceID)
 {
   CopyUTF16toUTF8(aDeviceID, mRenderer);
   return NS_OK;
 }
 /* void spoofDriverVersion (in DOMString aDriverVersion); */
 NS_IMETHODIMP GfxInfo::SpoofDriverVersion(const nsAString & aDriverVersion)
 {
   CopyUTF16toUTF8(aDriverVersion, mVersion);
   return NS_OK;
 }
 /* void spoofOSVersion (in unsigned long aVersion); */
 NS_IMETHODIMP GfxInfo::SpoofOSVersion(uint32_t aVersion)
 {
   // We don't support OS versioning on Linux. There's just "Linux".
   return NS_OK;
 }
 #endif
 } // end namespace widget
 } // end namespace mozilla

The Tor Browser / annotate

widget/xpwidgets/GfxInfoX11.cpp@44a2da4a2ab2 (annotated)

widget/xpwidgets/GfxInfoX11.cpp