blob: 4a4d1426dbf26f2fe7b7f7c669cc4678df8aa4ea (
plain)
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
|
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef mozilla_PoisonIOInterposer_h
#define mozilla_PoisonIOInterposer_h
#include "mozilla/Types.h"
#include <stdio.h>
MOZ_BEGIN_EXTERN_C
/** Register file handle to be ignored by poisoning IO interposer. This function
* and the corresponding UnRegister function are necessary for exchange of handles
* between binaries not using the same CRT on Windows (which happens when one of
* them links the static CRT). In such cases, giving file descriptors or FILEs
* doesn't work because _get_osfhandle fails with "invalid parameter". */
void MozillaRegisterDebugHandle(intptr_t aHandle);
/** Register file descriptor to be ignored by poisoning IO interposer */
void MozillaRegisterDebugFD(int aFd);
/** Register file to be ignored by poisoning IO interposer */
void MozillaRegisterDebugFILE(FILE* aFile);
/** Unregister file handle from being ignored by poisoning IO interposer */
void MozillaUnRegisterDebugHandle(intptr_t aHandle);
/** Unregister file descriptor from being ignored by poisoning IO interposer */
void MozillaUnRegisterDebugFD(int aFd);
/** Unregister file from being ignored by poisoning IO interposer */
void MozillaUnRegisterDebugFILE(FILE* aFile);
MOZ_END_EXTERN_C
#if defined(XP_WIN) || defined(XP_MACOSX)
#ifdef __cplusplus
namespace mozilla {
/**
* Check if a file is registered as a debug file.
*/
bool IsDebugFile(intptr_t aFileID);
/**
* Initialize IO poisoning, this is only safe to do on the main-thread when no
* other threads are running.
*
* Please, note that this probably has performance implications as all
*/
void InitPoisonIOInterposer();
#ifdef XP_MACOSX
/**
* Check that writes are dirty before reporting I/O (Mac OS X only)
* This is necessary for late-write checks on Mac OS X, but reading the buffer
* from file to see if we're writing dirty bits is expensive, so we don't want
* to do this for everything else that uses
*/
void OnlyReportDirtyWrites();
#endif /* XP_MACOSX */
/**
* Clear IO poisoning, this is only safe to do on the main-thread when no other
* threads are running.
*/
void ClearPoisonIOInterposer();
} // namespace mozilla
#endif /* __cplusplus */
#else /* XP_WIN || XP_MACOSX */
#ifdef __cplusplus
namespace mozilla {
inline bool IsDebugFile(intptr_t aFileID) { return true; }
inline void InitPoisonIOInterposer() {}
inline void ClearPoisonIOInterposer() {}
#ifdef XP_MACOSX
inline void OnlyReportDirtyWrites() {}
#endif /* XP_MACOSX */
} // namespace mozilla
#endif /* __cplusplus */
#endif /* XP_WIN || XP_MACOSX */
#endif // mozilla_PoisonIOInterposer_h
|
