Convert plugin and GPU process to brokered handle duplication.

content/common/sandbox_policy.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/common/sandbox_policy.h"
 
 #include <string>
 
 #include "base/command_line.h"
 #include "base/debug/debugger.h"
@@ skipping 356 matching lines @@
 
   // Allow the server side of GPU sockets, which are pipes that have
   // the "chrome.gpu" namespace and an arbitrary suffix.
   sandbox::ResultCode result = policy->AddRule(
       sandbox::TargetPolicy::SUBSYS_NAMED_PIPES,
       sandbox::TargetPolicy::NAMEDPIPES_ALLOW_ANY,
       L"\\\\.\\pipe\\chrome.gpu.*");
   if (result != sandbox::SBOX_ALL_OK)
     return false;
 
+  // GPU needs to copy sections to renderers.
+  result = policy->AddRule(sandbox::TargetPolicy::SUBSYS_HANDLES,
+                           sandbox::TargetPolicy::HANDLES_DUP_ANY,
+                           L"Section");
+  if (result != sandbox::SBOX_ALL_OK)
+    return false;
+
   AddGenericDllEvictionPolicy(policy);
 #endif
   return true;
 }
 
 bool AddPolicyForRenderer(sandbox::TargetPolicy* policy) {
-  // Renderers need to copy sections for plugin DIBs.
+  // Renderers need to copy sections for plugin DIBs and GPU.
   sandbox::ResultCode result;
   result = policy->AddRule(sandbox::TargetPolicy::SUBSYS_HANDLES,
                            sandbox::TargetPolicy::HANDLES_DUP_ANY,
                            L"Section");
-  if (result != sandbox::SBOX_ALL_OK) {
-    NOTREACHED();
+  if (result != sandbox::SBOX_ALL_OK)
     return false;
-  }
+
+  // Renderers need to share events with plugins.
+  result = policy->AddRule(sandbox::TargetPolicy::SUBSYS_HANDLES,
+                           sandbox::TargetPolicy::HANDLES_DUP_ANY,
+                           L"Event");
+  if (result != sandbox::SBOX_ALL_OK)
+    return false;
 
   policy->SetJobLevel(sandbox::JOB_LOCKDOWN, 0);
 
   sandbox::TokenLevel initial_token = sandbox::USER_UNPROTECTED;
   if (base::win::GetVersion() > base::win::VERSION_XP) {
     // On 2003/Vista the initial token has to be restricted if the main
     // token is restricted.
     initial_token = sandbox::USER_RESTRICTED_SAME_ACCESS;
   }
 
@@ skipping 42 matching lines @@
   sandbox::ResultCode result = target_services->Init();
   g_target_services = target_services;
   return SBOX_ALL_OK == result;
 }
 
 bool BrokerDuplicateHandle(HANDLE source_handle,
                            DWORD target_process_id,
                            HANDLE* target_handle,
                            DWORD desired_access,
                            DWORD options) {
-  // Just use DuplicateHandle() if we aren't in the sandbox.
-  if (!g_target_services) {
-    base::win::ScopedHandle target_process(::OpenProcess(PROCESS_DUP_HANDLE,
-                                                         FALSE,
-                                                         target_process_id));
-    if (!target_process.IsValid())
-      return false;
+  // If our process is the target just duplicate the handle.
+  if (::GetCurrentProcessId() == target_process_id) {
+    return !!::DuplicateHandle(::GetCurrentProcess(), source_handle,
+                               ::GetCurrentProcess(), target_handle,
+                               desired_access, FALSE, options);
 
-    if (!::DuplicateHandle(::GetCurrentProcess(), source_handle,
-                           target_process, target_handle,
-                           desired_access, FALSE,
-                           options)) {
-      return false;
-    }
+  }
 
+  // Try the broker next
+  if (g_target_services &&
+      g_target_services->DuplicateHandle(source_handle, target_process_id,
+                                         target_handle, desired_access,
+                                         options) == SBOX_ALL_OK) {
     return true;
   }
 
-  ResultCode result = g_target_services->DuplicateHandle(source_handle,
-                                                         target_process_id,
-                                                         target_handle,
-                                                         desired_access,
-                                                         options);
-  return SBOX_ALL_OK == result;
+  // Finally, see if we already have access to the process.
+  base::win::ScopedHandle target_process;
+  target_process.Set(::OpenProcess(PROCESS_DUP_HANDLE, FALSE,
+                                    target_process_id));
+  if (target_process.IsValid()) {
+    return !!::DuplicateHandle(::GetCurrentProcess(), source_handle,
+                                target_process, target_handle,
+                                desired_access, FALSE, options);
+  }
+
+  return false;
 }
 
 
 base::ProcessHandle StartProcessWithAccess(CommandLine* cmd_line,
                                            const FilePath& exposed_dir) {
   const CommandLine& browser_command_line = *CommandLine::ForCurrentProcess();
   content::ProcessType type;
   std::string type_str = cmd_line->GetSwitchValueASCII(switches::kProcessType);
   if (type_str == switches::kRendererProcess) {
     type = content::PROCESS_TYPE_RENDERER;
@@ skipping 78 matching lines @@
       !browser_command_line.HasSwitch(switches::kNoSandbox) &&
       content::GetContentClient()->SandboxPlugin(cmd_line, policy)) {
     in_sandbox = true;
   }
 #endif
 
   if (!in_sandbox) {
     policy->Release();
     base::ProcessHandle process = 0;
     base::LaunchProcess(*cmd_line, base::LaunchOptions(), &process);
+    g_broker_services->AddTargetPeer(process);
     return process;
   }
 
   if (type == content::PROCESS_TYPE_PLUGIN) {
     AddGenericDllEvictionPolicy(policy);
     AddPluginDllEvictionPolicy(policy);
   } else if (type == content::PROCESS_TYPE_GPU) {
     if (!AddPolicyForGPU(cmd_line, policy))
       return 0;
   } else {
@@ skipping 79 matching lines @@
 
   // Help the process a little. It can't start the debugger by itself if
   // the process is in a sandbox.
   if (child_needs_help)
     base::debug::SpawnDebuggerOnProcess(target.process_id());
 
   return target.TakeProcessHandle();
 }
 
 }  // namespace sandbox