Enable mmap and identity-based validation caching on pnacl-{llc,ld}.nexe

components/nacl/renderer/ppb_nacl_private_impl.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 "components/nacl/renderer/ppb_nacl_private_impl.h"
 
 #include <numeric>
 #include <string>
 #include <vector>
 
@@ skipping 512 matching lines @@
   size_t replace_pos;
   static const char* white_list = "abcdefghijklmnopqrstuvwxyz0123456789_";
   replace_pos = r.find_first_not_of(white_list);
   while(replace_pos != std::string::npos) {
     r = r.replace(replace_pos, 1, "_");
     replace_pos = r.find_first_not_of(white_list);
   }
   return r;
 }
 
-PP_FileHandle GetReadonlyPnaclFd(const char* url) {
+PP_FileHandle GetReadonlyPnaclFd(const char* url,
+                                 bool is_executable,
+                                 uint64_t* nonce_lo,
+                                 uint64_t* nonce_hi) {
   std::string filename = PnaclComponentURLToFilename(url);
   IPC::PlatformFileForTransit out_fd = IPC::InvalidPlatformFileForTransit();
   IPC::Sender* sender = content::RenderThread::Get();
   DCHECK(sender);
   if (!sender->Send(new NaClHostMsg_GetReadonlyPnaclFD(
-          std::string(filename),
-          &out_fd))) {
+          std::string(filename), is_executable,
+          &out_fd, nonce_lo, nonce_hi))) {
     return PP_kInvalidFileHandle;
   }
   if (out_fd == IPC::InvalidPlatformFileForTransit()) {
     return PP_kInvalidFileHandle;
   }
   return IPC::PlatformFileForTransitToPlatformFile(out_fd);
 }
 
+void GetReadExecPnaclFd(const char* url,
+                        PP_NaClFileInfo* out_file_info) {
+  *out_file_info = kInvalidNaClFileInfo;
+  out_file_info->handle = GetReadonlyPnaclFd(url, true /* is_executable */,
+                                             &out_file_info->token_lo,
+                                             &out_file_info->token_hi);
+}
+
 PP_FileHandle CreateTemporaryFile(PP_Instance instance) {
   IPC::PlatformFileForTransit transit_fd = IPC::InvalidPlatformFileForTransit();
   IPC::Sender* sender = content::RenderThread::Get();
   DCHECK(sender);
   if (!sender->Send(new NaClHostMsg_NaClCreateTemporaryFile(
           &transit_fd))) {
     return PP_kInvalidFileHandle;
   }
 
   if (transit_fd == IPC::InvalidPlatformFileForTransit()) {
@@ skipping 542 matching lines @@
 
 PP_Bool GetPNaClResourceInfo(PP_Instance instance,
                              const char* filename,
                              PP_Var* llc_tool_name,
                              PP_Var* ld_tool_name) {
   NexeLoadManager* load_manager = GetNexeLoadManager(instance);
   DCHECK(load_manager);
   if (!load_manager)
     return PP_FALSE;
 
-  base::File file(GetReadonlyPnaclFd(filename));
+  uint64_t nonce_lo = 0;
+  uint64_t nonce_hi = 0;
+  base::File file(GetReadonlyPnaclFd(filename, false /* is_executable */,
+                                     &nonce_lo, &nonce_hi));
   if (!file.IsValid()) {
     load_manager->ReportLoadError(
         PP_NACL_ERROR_PNACL_RESOURCE_FETCH,
         "The Portable Native Client (pnacl) component is not "
         "installed. Please consult chrome://components for more "
         "information.");
     return PP_FALSE;
   }
 
   base::File::Info file_info;
@@ skipping 305 matching lines @@
         FROM_HERE,
         base::Bind(callback,
                    static_cast<int32_t>(PP_ERROR_FAILED),
                    kInvalidNaClFileInfo));
     return;
   }
 
   // Handle special PNaCl support files which are installed on the user's
   // machine.
   if (url.find(kPNaClTranslatorBaseUrl, 0) == 0) {
-    PP_FileHandle handle = GetReadonlyPnaclFd(url.c_str());
+    PP_NaClFileInfo file_info = kInvalidNaClFileInfo;
+    PP_FileHandle handle = GetReadonlyPnaclFd(url.c_str(),
+                                              false /* is_executable */,
+                                              &file_info.token_lo,
+                                              &file_info.token_hi);
     if (handle == PP_kInvalidFileHandle) {
       base::MessageLoop::current()->PostTask(
           FROM_HERE,
           base::Bind(callback,
                      static_cast<int32_t>(PP_ERROR_FAILED),
                      kInvalidNaClFileInfo));
       return;
     }
-    // TODO(ncbray): enable the fast loading and validation paths for this type
-    // of file.
-    PP_NaClFileInfo file_info;
     file_info.handle = handle;
-    file_info.token_lo = 0;
-    file_info.token_hi = 0;
     base::MessageLoop::current()->PostTask(
         FROM_HERE,
         base::Bind(callback, static_cast<int32_t>(PP_OK), file_info));
     return;
   }
 
   // We have to ensure that this url resolves relative to the plugin base url
   // before downloading it.
   const GURL& test_gurl = load_manager->plugin_base_url().Resolve(url);
   if (!test_gurl.is_valid()) {
@@ skipping 118 matching lines @@
   if (load_manager)
     load_manager->set_pnacl_start_time(base::Time::Now());
 }
 
 const PPB_NaCl_Private nacl_interface = {
   &LaunchSelLdr,
   &StartPpapiProxy,
   &UrandomFD,
   &Are3DInterfacesDisabled,
   &BrokerDuplicateHandle,
-  &GetReadonlyPnaclFd,
+  &GetReadExecPnaclFd,
   &CreateTemporaryFile,
   &GetNumberOfProcessors,
   &PPIsNonSFIModeEnabled,
   &GetNexeFd,
   &ReportTranslationFinished,
   &DispatchEvent,
   &ReportLoadSuccess,
   &ReportLoadError,
   &ReportLoadAbort,
   &NexeDidCrash,
@@ skipping 23 matching lines @@
   &SetPNaClStartTime
 };
 
 }  // namespace
 
 const PPB_NaCl_Private* GetNaClPrivateInterface() {
   return &nacl_interface;
 }
 
 }  // namespace nacl