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// Copyright (c) 2006-2010 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.
// Defines InterceptionManager, the class in charge of setting up interceptions
// for the sandboxed process. For more details see:
// http://dev.chromium.org/developers/design-documents/sandbox .
#ifndef SANDBOX_SRC_INTERCEPTION_INTERNAL_H_
#define SANDBOX_SRC_INTERCEPTION_INTERNAL_H_
#include <stddef.h>
#include "sandbox/win/src/interceptors.h"
#include "sandbox/win/src/sandbox_types.h"
namespace sandbox {
const int kMaxThunkDataBytes = 64;
// The following structures contain variable size fields at the end, and will be
// used to transfer information between two processes. In order to guarantee
// our ability to follow the chain of structures, the alignment should be fixed,
// hence this pragma.
#pragma pack(push, 4)
// Structures for the shared memory that contains patching information
// for the InterceptionAgent.
// A single interception:
struct FunctionInfo {
size_t record_bytes; // rounded to sizeof(size_t) bytes
InterceptionType type;
InterceptorId id;
const void* interceptor_address;
char function[1]; // placeholder for null terminated name
// char interceptor[] // followed by the interceptor function
};
// A single dll:
struct DllPatchInfo {
size_t record_bytes; // rounded to sizeof(size_t) bytes
size_t offset_to_functions;
int num_functions;
bool unload_module;
wchar_t dll_name[1]; // placeholder for null terminated name
// FunctionInfo function_info[] // followed by the functions to intercept
};
// All interceptions:
struct SharedMemory {
int num_intercepted_dlls;
void* interceptor_base;
DllPatchInfo dll_list[1]; // placeholder for the list of dlls
};
// Dummy single thunk:
struct ThunkData {
char data[kMaxThunkDataBytes];
};
// In-memory representation of the interceptions for a given dll:
struct DllInterceptionData {
size_t data_bytes;
size_t used_bytes;
void* base;
int num_thunks;
#if defined(_WIN64)
int dummy; // Improve alignment.
#endif
ThunkData thunks[1];
};
#pragma pack(pop)
} // namespace sandbox
#endif // SANDBOX_SRC_INTERCEPTION_INTERNAL_H_
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