Load v8 snapshots directly from APK (and store them uncompressed)

content/shell/browser/shell_content_browser_client.cc

 // Copyright 2013 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/shell/browser/shell_content_browser_client.h"
 
 #include "base/base_switches.h"
 #include "base/command_line.h"
 #include "base/files/file.h"
 #include "base/files/file_util.h"
@@ skipping 16 matching lines @@
 #include "content/shell/browser/shell_browser_context.h"
 #include "content/shell/browser/shell_browser_main_parts.h"
 #include "content/shell/browser/shell_devtools_manager_delegate.h"
 #include "content/shell/browser/shell_net_log.h"
 #include "content/shell/browser/shell_quota_permission_context.h"
 #include "content/shell/browser/shell_resource_dispatcher_host_delegate.h"
 #include "content/shell/browser/shell_web_contents_view_delegate_creator.h"
 #include "content/shell/common/shell_messages.h"
 #include "content/shell/common/shell_switches.h"
 #include "content/shell/renderer/layout_test/blink_test_helpers.h"
-#include "gin/v8_initializer.h"
 #include "net/url_request/url_request_context_getter.h"
 #include "url/gurl.h"
 
 #if defined(OS_ANDROID)
 #include "base/android/path_utils.h"
 #include "components/crash/browser/crash_dump_manager_android.h"
 #include "content/shell/android/shell_descriptors.h"
 #endif
 
 #if defined(OS_POSIX) && !defined(OS_MACOSX)
@@ skipping 74 matching lines @@
 
 ShellContentBrowserClient* ShellContentBrowserClient::Get() {
   return g_browser_client;
 }
 
 void ShellContentBrowserClient::SetSwapProcessesForRedirect(bool swap) {
   g_swap_processes_for_redirect = swap;
 }
 
 ShellContentBrowserClient::ShellContentBrowserClient()
-    :
-#if defined(OS_POSIX) && !defined(OS_MACOSX)
-      v8_natives_fd_(-1),
-      v8_snapshot_fd_(-1),
-#endif  // OS_POSIX && !OS_MACOSX
-      shell_browser_main_parts_(NULL) {
+    : shell_browser_main_parts_(NULL) {
   DCHECK(!g_browser_client);
   g_browser_client = this;
 }
 
 ShellContentBrowserClient::~ShellContentBrowserClient() {
   g_browser_client = NULL;
 }
 
 BrowserMainParts* ShellContentBrowserClient::CreateBrowserMainParts(
     const MainFunctionParams& parameters) {
@@ skipping 58 matching lines @@
   return false;
 }
 
 void ShellContentBrowserClient::AppendMappedFileCommandLineSwitches(
     base::CommandLine* command_line) {
 #if defined(OS_POSIX) && !defined(OS_MACOSX)
 #if defined(V8_USE_EXTERNAL_STARTUP_DATA)
   std::string process_type =
       command_line->GetSwitchValueASCII(switches::kProcessType);
   if (process_type != switches::kZygoteProcess) {
-    DCHECK(natives_fd_exists());
+    DCHECK(v8_files_.natives_fd.is_valid());
     command_line->AppendSwitch(::switches::kV8NativesPassedByFD);
-    if (snapshot_fd_exists())
+    // V8 can't start up without the source of the natives, but it can
+    // start up (slower) without the snapshot.
+    if (v8_files_.snapshot_fd.is_valid()) {
       command_line->AppendSwitch(::switches::kV8SnapshotPassedByFD);
+    }
   }
 #endif  // V8_USE_EXTERNAL_STARTUP_DATA
 #endif  // OS_POSIX && !OS_MACOSX
 }
 
 void ShellContentBrowserClient::AppendExtraCommandLineSwitches(
     base::CommandLine* command_line,
     int child_process_id) {
   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kRunLayoutTest))
@@ skipping 116 matching lines @@
 #if defined(OS_POSIX) && !defined(OS_MACOSX)
 void ShellContentBrowserClient::GetAdditionalMappedFilesForChildProcess(
     const base::CommandLine& command_line,
     int child_process_id,
     FileDescriptorInfo* mappings
 #if defined(OS_ANDROID)
     , std::map<int, base::MemoryMappedFile::Region>* regions
 #endif
     ) {
 #if defined(V8_USE_EXTERNAL_STARTUP_DATA)
-  if (!natives_fd_exists()) {
-    int v8_natives_fd = -1;
-    int v8_snapshot_fd = -1;
-    if (gin::V8Initializer::OpenV8FilesForChildProcesses(&v8_natives_fd,
-                                                         &v8_snapshot_fd)) {
-      v8_natives_fd_.reset(v8_natives_fd);
-      v8_snapshot_fd_.reset(v8_snapshot_fd);
-    }
+  if (!v8_files_.natives_fd.is_valid()) {
+    gin::V8Initializer::OpenV8FilesForChildProcesses(&v8_files_);
   }
-  // V8 can't start up without the source of the natives, but it can
-  // start up (slower) without the snapshot.
-  DCHECK(natives_fd_exists());
-  mappings->Share(kV8NativesDataDescriptor, v8_natives_fd_.get());
-  mappings->Share(kV8SnapshotDataDescriptor, v8_snapshot_fd_.get());
+  DCHECK(v8_files_.natives_fd.is_valid());
+  mappings->Share(kV8NativesDataDescriptor, v8_files_.natives_fd.get());
+#if defined(OS_ANDROID)
+  regions->insert(
+      std::make_pair(kV8NativesDataDescriptor, v8_files_.natives_region));
+#endif
+  if (v8_files_.snapshot_fd.is_valid()) {
+    mappings->Share(kV8SnapshotDataDescriptor, v8_files_.snapshot_fd.get());
+#if defined(OS_ANDROID)
+    regions->insert(
+        std::make_pair(kV8SnapshotDataDescriptor, v8_files_.snapshot_region));
+#endif
+  }
 #endif  // V8_USE_EXTERNAL_STARTUP_DATA
-
 #if defined(OS_ANDROID)
   int flags = base::File::FLAG_OPEN | base::File::FLAG_READ;
   base::FilePath pak_file;
   bool r = PathService::Get(base::DIR_ANDROID_APP_DATA, &pak_file);
   CHECK(r);
   pak_file = pak_file.Append(FILE_PATH_LITERAL("paks"));
   pak_file = pak_file.Append(FILE_PATH_LITERAL("content_shell.pak"));
 
   base::File f(pak_file, flags);
   if (!f.IsValid()) {
@@ skipping 55 matching lines @@
 ShellBrowserContext*
 ShellContentBrowserClient::ShellBrowserContextForBrowserContext(
     BrowserContext* content_browser_context) {
   if (content_browser_context == browser_context())
     return browser_context();
   DCHECK_EQ(content_browser_context, off_the_record_browser_context());
   return off_the_record_browser_context();
 }
 
 }  // namespace content