dom/canvas/SanitizeRenderer.h

   1 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #ifndef mozilla_RendererSanitizer_h
   7 #define mozilla_RendererSanitizer_h
   8
   9 #include <string>
  10
  11 namespace mozilla {
  12 namespace dom {
  13
  14 inline static void SanitizeRenderer(std::string& aRenderer) {
  15   // Remove DRM, kernel, and LLVM versions exposed by amdgpu.
  16   // The string looks like this:
  17   //
  18   // AMD Radeon (TM) GPU model Graphics (GPUgeneration, DRM
  19   // DRMversion, kernelversion, LLVM LLVMversion)
  20   //
  21   // e.g. AMD Radeon (TM) RX 460 Graphics (POLARIS11,
  22   // DRM 3.35.0, 5.4.0-65-generic, LLVM 11.0.0)
  23   //
  24   // OR
  25   //
  26   // AMD Radeon GPU model (GPUgeneration, DRM DRMversion, kernelversion, LLVM
  27   // LLVMversion)
  28   //
  29   // Just in case, let's handle the case without GPUgeneration, i.e.
  30   //
  31   // AMD Radeon GPU model (DRM DRMversion, kernelversion, LLVM LLVMversion)
  32   //
  33   // even though there's no existence proof of this variant.
  34   if (aRenderer.empty()) {
  35     return;
  36   }
  37   if (aRenderer.back() != ')') {
  38     return;
  39   }
  40   auto pos = aRenderer.find(", DRM ");
  41   if (pos != std::string::npos) {
  42     aRenderer.resize(pos);
  43     aRenderer.push_back(')');
  44     return;
  45   }
  46   pos = aRenderer.find(" (DRM ");
  47   if (pos != std::string::npos) {
  48     aRenderer.resize(pos);
  49     return;
  50   }
  51 }
  52
  53 };  // namespace dom
  54 };  // namespace mozilla
  55
  56 #endif  // mozilla_RendererSanitizer_h