michael@0: // Copyright (c) 2006-2010 The Chromium Authors. All rights reserved.
michael@0: // Use of this source code is governed by a BSD-style license that can be
michael@0: // found in the LICENSE file.
michael@0: 
michael@0: // Defines InterceptionManager, the class in charge of setting up interceptions
michael@0: // for the sandboxed process. For more details see:
michael@0: // http://dev.chromium.org/developers/design-documents/sandbox .
michael@0: 
michael@0: #ifndef SANDBOX_SRC_INTERCEPTION_INTERNAL_H_
michael@0: #define SANDBOX_SRC_INTERCEPTION_INTERNAL_H_
michael@0: 
michael@0: #include "sandbox/win/src/sandbox_types.h"
michael@0: 
michael@0: namespace sandbox {
michael@0: 
michael@0: const int kMaxThunkDataBytes = 64;
michael@0: 
michael@0: enum InterceptorId;
michael@0: 
michael@0: // The following structures contain variable size fields at the end, and will be
michael@0: // used to transfer information between two processes. In order to guarantee
michael@0: // our ability to follow the chain of structures, the alignment should be fixed,
michael@0: // hence this pragma.
michael@0: #pragma pack(push, 4)
michael@0: 
michael@0: // Structures for the shared memory that contains patching information
michael@0: // for the InterceptionAgent.
michael@0: // A single interception:
michael@0: struct FunctionInfo {
michael@0:   size_t record_bytes;            // rounded to sizeof(size_t) bytes
michael@0:   InterceptionType type;
michael@0:   InterceptorId id;
michael@0:   const void* interceptor_address;
michael@0:   char function[1];               // placeholder for null terminated name
michael@0:   // char interceptor[]           // followed by the interceptor function
michael@0: };
michael@0: 
michael@0: // A single dll:
michael@0: struct DllPatchInfo {
michael@0:   size_t record_bytes;            // rounded to sizeof(size_t) bytes
michael@0:   size_t offset_to_functions;
michael@0:   int num_functions;
michael@0:   bool unload_module;
michael@0:   wchar_t dll_name[1];            // placeholder for null terminated name
michael@0:   // FunctionInfo function_info[] // followed by the functions to intercept
michael@0: };
michael@0: 
michael@0: // All interceptions:
michael@0: struct SharedMemory {
michael@0:   int num_intercepted_dlls;
michael@0:   void* interceptor_base;
michael@0:   DllPatchInfo dll_list[1];       // placeholder for the list of dlls
michael@0: };
michael@0: 
michael@0: // Dummy single thunk:
michael@0: struct ThunkData {
michael@0:   char data[kMaxThunkDataBytes];
michael@0: };
michael@0: 
michael@0: // In-memory representation of the interceptions for a given dll:
michael@0: struct DllInterceptionData {
michael@0:   size_t data_bytes;
michael@0:   size_t used_bytes;
michael@0:   void* base;
michael@0:   int num_thunks;
michael@0: #if defined(_WIN64)
michael@0:   int dummy;                      // Improve alignment.
michael@0: #endif
michael@0:   ThunkData thunks[1];
michael@0: };
michael@0: 
michael@0: #pragma pack(pop)
michael@0: 
michael@0: }  // namespace sandbox
michael@0: 
michael@0: #endif  // SANDBOX_SRC_INTERCEPTION_INTERNAL_H_