1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
|
// Copyright 2017 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 "sandbox/win/src/ipc_args.h"
#include <stddef.h>
#include "sandbox/win/src/crosscall_params.h"
#include "sandbox/win/src/crosscall_server.h"
namespace sandbox {
// Releases memory allocated for IPC arguments, if needed.
void ReleaseArgs(const IPCParams* ipc_params, void* args[kMaxIpcParams]) {
for (size_t i = 0; i < kMaxIpcParams; i++) {
switch (ipc_params->args[i]) {
case WCHAR_TYPE: {
delete reinterpret_cast<std::wstring*>(args[i]);
args[i] = nullptr;
break;
}
case INPTR_TYPE:
case INOUTPTR_TYPE: {
delete reinterpret_cast<CountedBuffer*>(args[i]);
args[i] = nullptr;
break;
}
default:
break;
}
}
}
// Fills up the list of arguments (args and ipc_params) for an IPC call.
bool GetArgs(CrossCallParamsEx* params,
IPCParams* ipc_params,
void* args[kMaxIpcParams]) {
if (kMaxIpcParams < params->GetParamsCount())
return false;
for (uint32_t i = 0; i < params->GetParamsCount(); i++) {
uint32_t size;
ArgType type;
args[i] = params->GetRawParameter(i, &size, &type);
if (args[i]) {
ipc_params->args[i] = type;
switch (type) {
case WCHAR_TYPE: {
std::unique_ptr<std::wstring> data(new std::wstring);
if (!params->GetParameterStr(i, data.get())) {
args[i] = 0;
ReleaseArgs(ipc_params, args);
return false;
}
args[i] = data.release();
break;
}
case UINT32_TYPE: {
uint32_t data;
if (!params->GetParameter32(i, &data)) {
ReleaseArgs(ipc_params, args);
return false;
}
IPCInt ipc_int(data);
args[i] = ipc_int.AsVoidPtr();
break;
}
case VOIDPTR_TYPE: {
void* data;
if (!params->GetParameterVoidPtr(i, &data)) {
ReleaseArgs(ipc_params, args);
return false;
}
args[i] = data;
break;
}
case INPTR_TYPE:
case INOUTPTR_TYPE: {
if (!args[i]) {
ReleaseArgs(ipc_params, args);
return false;
}
CountedBuffer* buffer = new CountedBuffer(args[i], size);
args[i] = buffer;
break;
}
default:
break;
}
}
}
return true;
}
} // namespace sandbox
|
