NaCl: enable meta-based validation for shared libraries.

chrome/nacl/nacl_listener.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 "chrome/nacl/nacl_listener.h"
 
 #include <errno.h>
 #include <stdlib.h>
 
 #include "base/command_line.h"
@@ skipping 112 matching lines @@
     return result;
   }
 
   virtual void SetKnownToValidate(const std::string& signature) OVERRIDE {
     // Caching is optional: NaCl will still work correctly if the IPC fails.
     if (!listener_->Send(new NaClProcessMsg_SetKnownToValidate(signature))) {
       LOG(ERROR) << "Failed to update NaCl validation cache.";
     }
   }
 
+  virtual bool ResolveFileNonce(uint64 nonce, int32* fd,
+                                std::string* path) OVERRIDE {
+    *fd = -1;
+    *path = "";
+    if (nonce == 0) {
+      return false;
+    }
+    IPC::PlatformFileForTransit ipc_fd;
+    base::FilePath ipc_path;
+    if (!listener_->Send(new NaClProcessMsg_ResolveFileNonce(nonce, &ipc_fd,
+                                                             &ipc_path))) {
+      return false;
+    }
+    if (ipc_fd == IPC::InvalidPlatformFileForTransit()) {
+      return false;
+    }
+    base::PlatformFile handle =
+        IPC::PlatformFileForTransitToPlatformFile(ipc_fd);
+#if defined(OS_WIN)
+    // On Windows, valid handles are 32 bit unsigned integers so this is safe.
+    *fd = reinterpret_cast<uintptr_t>(handle);
+#else
+    *fd = handle;
+#endif
+    *path = ipc_path.AsUTF8Unsafe();
+    return true;
+  }
+
  private:
   // The listener never dies, otherwise this might be a dangling reference.
   NaClListener* listener_;
 };
 
 
 NaClListener::NaClListener() : shutdown_event_(true, false),
                                io_thread_("NaCl_IOThread"),
 #if defined(OS_LINUX)
                                prereserved_sandbox_size_(0),
@@ skipping 133 matching lines @@
 #if defined(OS_WIN)
   args->broker_duplicate_handle_func = BrokerDuplicateHandle;
   args->attach_debug_exception_handler_func = AttachDebugExceptionHandler;
 #endif
 #if defined(OS_LINUX)
   args->prereserved_sandbox_size = prereserved_sandbox_size_;
 #endif
   NaClChromeMainStart(args);
   NOTREACHED();
 }