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
|
/* -*- 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_StackWalk_windows_h
#define mozilla_StackWalk_windows_h
#include "mozilla/Array.h"
#include "mozilla/Types.h"
#if defined(_M_AMD64) || defined(_M_ARM64)
/**
* This function enables strategy (1) for avoiding deadlocks between the stack
* walking thread and the suspended thread. In aStackWalkLocks the caller must
* provide pointers to the two ntdll-internal SRW locks acquired by
* RtlLookupFunctionEntry. These locks are LdrpInvertedFunctionTableSRWLock and
* RtlpDynamicFunctionTableLock -- we don't need to know which one is which.
* Until InitializeStackWalkLocks function is called, strategy (2) is used.
*
* See comment in StackWalk.cpp
*/
MFBT_API
void InitializeStackWalkLocks(const mozilla::Array<void*, 2>& aStackWalkLocks);
/**
* As part of strategy (2) for avoiding deadlocks between the stack walking
* thread and the suspended thread, we mark stack walk suppression paths by
* putting them under the scope of a AutoSuppressStackWalking object. Any code
* path that may do an exclusive acquire of LdrpInvertedFunctionTableSRWLock or
* RtlpDynamicFunctionTableLock should be marked this way, to ensure that
* strategy (2) can properly mitigate all deadlock scenarios.
*
* See comment in StackWalk.cpp
*/
struct MOZ_RAII AutoSuppressStackWalking {
MFBT_API AutoSuppressStackWalking();
MFBT_API ~AutoSuppressStackWalking();
};
# if defined(IMPL_MFBT)
void SuppressStackWalking();
void DesuppressStackWalking();
# endif // defined(IMPL_MFBT)
MFBT_API void RegisterJitCodeRegion(uint8_t* aStart, size_t size);
MFBT_API void UnregisterJitCodeRegion(uint8_t* aStart, size_t size);
#endif // _M_AMD64 || _M_ARM64
#endif // mozilla_StackWalk_windows_h
|
