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Side by Side Diff: sandbox/win/src/resolver.h

Issue 1851213002: Remove sandbox on Windows. (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: fix nacl compile issues Created 4 years, 8 months ago
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1 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 // Defines ResolverThunk, the interface for classes that perform interceptions.
6 // For more details see
7 // http://dev.chromium.org/developers/design-documents/sandbox .
8
9 #include <stddef.h>
10
11 #include "base/macros.h"
12 #include "sandbox/win/src/nt_internals.h"
13
14 #ifndef SANDBOX_SRC_RESOLVER_H__
15 #define SANDBOX_SRC_RESOLVER_H__
16
17 namespace sandbox {
18
19 // A resolver is the object in charge of performing the actual interception of
20 // a function. There should be a concrete implementation of a resolver roughly
21 // per type of interception.
22 class ResolverThunk {
23 public:
24 ResolverThunk() {}
25 virtual ~ResolverThunk() {}
26
27 // Performs the actual interception of a function.
28 // target_name is an exported function from the module loaded at
29 // target_module, and must be replaced by interceptor_name, exported from
30 // interceptor_module. interceptor_entry_point can be provided instead of
31 // interceptor_name / interceptor_module.
32 // thunk_storage must point to a buffer on the child's address space, to hold
33 // the patch thunk, and related data. If provided, storage_used will receive
34 // the number of bytes used from thunk_storage.
35 //
36 // Example: (without error checking)
37 //
38 // size_t size = resolver.GetThunkSize();
39 // char* buffer = ::VirtualAllocEx(child_process, NULL, size,
40 // MEM_COMMIT, PAGE_READWRITE);
41 // resolver.Setup(ntdll_module, NULL, L"NtCreateFile", NULL,
42 // &MyReplacementFunction, buffer, size, NULL);
43 //
44 // In general, the idea is to allocate a single big buffer for all
45 // interceptions on the same dll, and call Setup n times.
46 // WARNING: This means that any data member that is specific to a single
47 // interception must be reset within this method.
48 virtual NTSTATUS Setup(const void* target_module,
49 const void* interceptor_module,
50 const char* target_name,
51 const char* interceptor_name,
52 const void* interceptor_entry_point,
53 void* thunk_storage,
54 size_t storage_bytes,
55 size_t* storage_used) = 0;
56
57 // Gets the address of function_name inside module (main exe).
58 virtual NTSTATUS ResolveInterceptor(const void* module,
59 const char* function_name,
60 const void** address);
61
62 // Gets the address of an exported function_name inside module.
63 virtual NTSTATUS ResolveTarget(const void* module,
64 const char* function_name,
65 void** address);
66
67 // Gets the required buffer size for this type of thunk.
68 virtual size_t GetThunkSize() const = 0;
69
70 protected:
71 // Performs basic initialization on behalf of a concrete instance of a
72 // resolver. That is, parameter validation and resolution of the target
73 // and the interceptor into the member variables.
74 //
75 // target_name is an exported function from the module loaded at
76 // target_module, and must be replaced by interceptor_name, exported from
77 // interceptor_module. interceptor_entry_point can be provided instead of
78 // interceptor_name / interceptor_module.
79 // thunk_storage must point to a buffer on the child's address space, to hold
80 // the patch thunk, and related data.
81 virtual NTSTATUS Init(const void* target_module,
82 const void* interceptor_module,
83 const char* target_name,
84 const char* interceptor_name,
85 const void* interceptor_entry_point,
86 void* thunk_storage,
87 size_t storage_bytes);
88
89 // Gets the required buffer size for the internal part of the thunk.
90 size_t GetInternalThunkSize() const;
91
92 // Initializes the internal part of the thunk.
93 // interceptor is the function to be called instead of original_function.
94 bool SetInternalThunk(void* storage, size_t storage_bytes,
95 const void* original_function, const void* interceptor);
96
97 // Holds the resolved interception target.
98 void* target_;
99 // Holds the resolved interception interceptor.
100 const void* interceptor_;
101
102 DISALLOW_COPY_AND_ASSIGN(ResolverThunk);
103 };
104
105 } // namespace sandbox
106
107 #endif // SANDBOX_SRC_RESOLVER_H__
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