GPU Watchdog to check I/O before terminating GPU process

content/browser/gpu/gpu_process_host.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/gpu/gpu_process_host.h"
 
 #include <stddef.h>
 
 #include <utility>
 
 #include "base/base64.h"
 #include "base/base_switches.h"
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/command_line.h"
+#include "base/files/file_util.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/metrics/histogram.h"
 #include "base/sha1.h"
 #include "base/threading/thread.h"
 #include "base/trace_event/trace_event.h"
 #include "build/build_config.h"
 #include "components/tracing/tracing_switches.h"
 #include "content/browser/browser_child_process_host_impl.h"
@@ skipping 226 matching lines @@
       base::string16 log_file_path = logging::GetLogFileFullPath();
       if (!log_file_path.empty()) {
         result = policy->AddRule(sandbox::TargetPolicy::SUBSYS_FILES,
                                  sandbox::TargetPolicy::FILES_ALLOW_ANY,
                                  log_file_path.c_str());
         if (result != sandbox::SBOX_ALL_OK)
           return false;
       }
     }
 
+    // Enable GPU watchdog to write to a temp file to test whether I/O
+    // is a bottleneck.
+    base::FilePath temp_dir_path;
+    if (GetTempDir(&temp_dir_path)) {
+      base::FilePath temp_file_path = temp_dir_path.Append(L"gpu-watchdog.tmp");
+      result = policy->AddRule(sandbox::TargetPolicy::SUBSYS_FILES,
+                               sandbox::TargetPolicy::FILES_ALLOW_ANY,
+                               temp_file_path.value().c_str());
+      if (result != sandbox::SBOX_ALL_OK)
+        return false;
+    }
+
     return true;
   }
 #elif defined(OS_POSIX)
 
   base::ScopedFD TakeIpcFd() override { return std::move(ipc_fd_); }
 #endif  // OS_WIN
 
   SandboxType GetSandboxType() override {
     return SANDBOX_TYPE_GPU;
   }
@@ skipping 899 matching lines @@
   TRACE_EVENT0("gpu", "GpuProcessHost::OnCacheShader");
   ClientIdToShaderCacheMap::iterator iter =
       client_id_to_shader_cache_.find(client_id);
   // If the cache doesn't exist then this is an off the record profile.
   if (iter == client_id_to_shader_cache_.end())
     return;
   iter->second->Cache(GetShaderPrefixKey() + ":" + key, shader);
 }
 
 }  // namespace content