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// Copyright (c) 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 "base/files/file_path.h"
#include "base/logging.h"
#include "base/native_library.h"
#include "base/path_service.h"
#include "chrome/common/external_ipc_dumper.h"
typedef IPC::ChannelProxy::OutgoingMessageFilter* (*GetFilterFunction)();
typedef void (*SetDumpDirectoryFunction)(const base::FilePath&);
const char kFilterEntryName[] = "GetFilter";
const char kSetDumpDirectoryEntryName[] = "SetDumpDirectory";
#if defined(OS_WIN)
#define IPC_MESSAGE_DUMP_MODULE FILE_PATH_LITERAL("ipc_message_dump.dll")
#else
#define IPC_MESSAGE_DUMP_MODULE FILE_PATH_LITERAL("libipc_message_dump.so")
#endif
IPC::ChannelProxy::OutgoingMessageFilter* LoadExternalIPCDumper(
const base::FilePath& dump_directory) {
base::FilePath module_path;
if (!PathService::Get(base::DIR_MODULE, &module_path)) {
LOG(ERROR) << "Unable to get message dump module directory.";
return NULL;
}
base::FilePath library_path = module_path.Append(IPC_MESSAGE_DUMP_MODULE);
base::NativeLibraryLoadError load_error;
base::NativeLibrary library =
base::LoadNativeLibrary(library_path, &load_error);
if (!library) {
LOG(ERROR) << load_error.ToString();
return NULL;
}
SetDumpDirectoryFunction set_directory_entry_point =
reinterpret_cast<SetDumpDirectoryFunction>(
base::GetFunctionPointerFromNativeLibrary(
library, kSetDumpDirectoryEntryName));
if (!set_directory_entry_point) {
LOG(ERROR) << kSetDumpDirectoryEntryName
<< " not exported by message dump module.";
return NULL;
}
set_directory_entry_point(dump_directory);
GetFilterFunction filter_entry_point = reinterpret_cast<GetFilterFunction>(
base::GetFunctionPointerFromNativeLibrary(library, kFilterEntryName));
if (!filter_entry_point) {
LOG(ERROR) << kFilterEntryName << " not exported by message dump module.";
return NULL;
}
return filter_entry_point();
}
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