Creating a pexe content handler to translate and run pexes.

services/nacl/pexe_linker_app.cc

+// Copyright 2015 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 <fcntl.h>
+
+#include "base/files/file_util.h"
+#include "mojo/nacl/nonsfi/nexe_launcher_nonsfi.h"
+#include "mojo/public/c/system/main.h"
+#include "mojo/public/cpp/application/application_connection.h"
+#include "mojo/public/cpp/application/application_delegate.h"
+#include "mojo/public/cpp/application/application_runner.h"
+#include "mojo/public/cpp/application/interface_factory.h"
+#include "mojo/public/cpp/bindings/strong_binding.h"
+#include "services/nacl/pexe_linker.mojom.h"
+
+namespace mojo {
+namespace nacl {
+
+class PexeLinkerImpl : public PexeLinker {
+  public:
+   void PexeLink(ScopedMessagePipeHandle handle) override {
+//     int nexe_fd = open("native_client/toolchain/linux_x86/pnacl_translator"
+//                        "/translator/x86-32-nonsfi/bin/ld.nexe", O_RDONLY);
+     int nexe_fd = open("sean_out/ld.nexe", O_RDONLY);

[Mark Seaborn, 2015/10/20 21:32:40]

Needs fixing. :-)

[Sean Klein, 2015/10/22 21:50:00]

No worries, the bots wouldn't let me get past this one.

In my issue description:
-I'm currently using an "ld.nexe" and "pnacl-llc.nexe" from a local
directory on my machine called "sean_out", since these updated nexes are
not committed/rolled into deps yet. These paths will be resolved before
this change is landed!

+     if (nexe_fd < 0)
+       LOG(FATAL) << "Could not open linker nexe";
+     ::nacl::MojoLaunchNexeNonsfi(nexe_fd, handle.Pass().get().value());
+   }
+};
+
+class StrongBindingPexeLinkerImpl : public PexeLinkerImpl {
+  public:
+   explicit StrongBindingPexeLinkerImpl(InterfaceRequest<PexeLinker> request)
+       : strong_binding_(this, request.Pass()) {}
+
+  private:
+   StrongBinding<PexeLinker> strong_binding_;
+};
+
+class MultiPexeLinker : public mojo::ApplicationDelegate,
+                            public mojo::InterfaceFactory<PexeLinker> {
+  public:
+   MultiPexeLinker() {}
+
+   // From ApplicationDelegate
+   bool ConfigureIncomingConnection(
+       mojo::ApplicationConnection* connection) override {
+     connection->AddService<PexeLinker>(this);
+     return true;
+   }
+
+   // From InterfaceFactory
+   void Create(mojo::ApplicationConnection* connection,
+               mojo::InterfaceRequest<PexeLinker> request) override {
+     new StrongBindingPexeLinkerImpl(request.Pass());
+   }
+};
+
+}  // namespace nacl
+}  // namespace mojo
+
+MojoResult MojoMain(MojoHandle application_request) {
+  mojo::ApplicationRunner runner(new mojo::nacl::MultiPexeLinker());
+  return runner.Run(application_request);
+}