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
|
/*
* This file is part of PowerDNS or dnsdist.
* Copyright -- PowerDNS.COM B.V. and its contributors
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* In addition, for the avoidance of any doubt, permission is granted to
* link this program with OpenSSL and to (re)distribute the binaries
* produced as the result of such linking.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef MTASKER_CONTEXT_HH
#define MTASKER_CONTEXT_HH
#include "lazy_allocator.hh"
#include <boost/function.hpp>
#include <vector>
#include <exception>
struct pdns_ucontext_t {
pdns_ucontext_t ();
pdns_ucontext_t (pdns_ucontext_t const&) = delete;
pdns_ucontext_t& operator= (pdns_ucontext_t const&) = delete;
~pdns_ucontext_t ();
void* uc_mcontext;
pdns_ucontext_t* uc_link;
std::vector<char, lazy_allocator<char>> uc_stack;
std::exception_ptr exception;
#ifdef PDNS_USE_VALGRIND
int valgrind_id;
#endif /* PDNS_USE_VALGRIND */
};
void
pdns_swapcontext
(pdns_ucontext_t& __restrict octx, pdns_ucontext_t const& __restrict ctx);
void
pdns_makecontext
(pdns_ucontext_t& ctx, boost::function<void(void)>& start);
#ifdef HAVE_FIBER_SANITIZER
#include <sanitizer/common_interface_defs.h>
#endif /* HAVE_FIBER_SANITIZER */
#ifdef HAVE_FIBER_SANITIZER
extern __thread void* t_mainStack;
extern __thread size_t t_mainStackSize;
#endif /* HAVE_FIBER_SANITIZER */
static inline void notifyStackSwitch(void* startOfStack, size_t stackSize)
{
#ifdef HAVE_FIBER_SANITIZER
__sanitizer_start_switch_fiber(nullptr, startOfStack, stackSize);
#endif /* HAVE_FIBER_SANITIZER */
}
static inline void notifyStackSwitchToKernel()
{
#ifdef HAVE_FIBER_SANITIZER
notifyStackSwitch(t_mainStack, t_mainStackSize);
#endif /* HAVE_FIBER_SANITIZER */
}
static inline void notifyStackSwitchDone()
{
#ifdef HAVE_FIBER_SANITIZER
#ifdef HAVE_SANITIZER_FINISH_SWITCH_FIBER_SINGLE_PTR
__sanitizer_finish_switch_fiber(nullptr);
#else /* HAVE_SANITIZER_FINISH_SWITCH_FIBER_SINGLE_PTR */
#ifdef HAVE_SANITIZER_FINISH_SWITCH_FIBER_THREE_PTRS
__sanitizer_finish_switch_fiber(nullptr, nullptr, nullptr);
#endif /* HAVE_SANITIZER_FINISH_SWITCH_FIBER_THREE_PTRS */
#endif /* HAVE_SANITIZER_FINISH_SWITCH_FIBER_SINGLE_PTR */
#endif /* HAVE_FIBER_SANITIZER */
}
#endif // MTASKER_CONTEXT_HH
|
