content: Not all memory creation failures are out of memory errors.

content/child/child_thread_impl.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/child/child_thread_impl.h"
 
 #include <signal.h>
 #include <string>
 #include <utility>
 
@@ skipping 565 matching lines @@
 }
 
 IPC::MessageRouter* ChildThreadImpl::GetRouter() {
   DCHECK(base::MessageLoop::current() == message_loop());
   return &router_;
 }
 
 std::unique_ptr<base::SharedMemory> ChildThreadImpl::AllocateSharedMemory(
     size_t buf_size) {
   DCHECK(base::MessageLoop::current() == message_loop());
-  return AllocateSharedMemory(buf_size, this);
+  return AllocateSharedMemory(buf_size, this, nullptr);
 }
 
 // static
 std::unique_ptr<base::SharedMemory> ChildThreadImpl::AllocateSharedMemory(
     size_t buf_size,
-    IPC::Sender* sender) {
+    IPC::Sender* sender,
+    bool* out_of_memory) {
   std::unique_ptr<base::SharedMemory> shared_buf;
   // Ask the browser to create the shared memory, since this is blocked by the
   // sandbox on most platforms.
   base::SharedMemoryHandle shared_mem_handle;
   if (sender->Send(new ChildProcessHostMsg_SyncAllocateSharedMemory(
           buf_size, &shared_mem_handle))) {
     if (base::SharedMemory::IsHandleValid(shared_mem_handle)) {
       shared_buf.reset(new base::SharedMemory(shared_mem_handle, false));
     } else {
-      NOTREACHED() << "Browser failed to allocate shared memory";
+      LOG(WARNING) << "Browser failed to allocate shared memory";
+      if (out_of_memory)
+        *out_of_memory = true;
       return nullptr;
     }
   } else {
     // Send is allowed to fail during shutdown. Return null in this case.
+    if (out_of_memory)
+      *out_of_memory = false;
     return nullptr;
   }
   return shared_buf;
 }
 
 bool ChildThreadImpl::OnMessageReceived(const IPC::Message& msg) {
   // Resource responses are sent to the resource dispatcher.
   if (resource_dispatcher_->OnMessageReceived(msg))
     return true;
   if (websocket_dispatcher_->OnMessageReceived(msg))
@@ skipping 105 matching lines @@
 void ChildThreadImpl::EnsureConnected() {
   VLOG(0) << "ChildThreadImpl::EnsureConnected()";
   base::Process::Current().Terminate(0, false);
 }
 
 bool ChildThreadImpl::IsInBrowserProcess() const {
   return static_cast<bool>(browser_process_io_runner_);
 }
 
 }  // namespace content