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12471842 PL |
1 | /* |
2 | * This file is part of PowerDNS or dnsdist. | |
3 | * Copyright -- PowerDNS.COM B.V. and its contributors | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of version 2 of the GNU General Public License as | |
7 | * published by the Free Software Foundation. | |
8 | * | |
9 | * In addition, for the avoidance of any doubt, permission is granted to | |
10 | * link this program with OpenSSL and to (re)distribute the binaries | |
11 | * produced as the result of such linking. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
21 | */ | |
5cf909f3 AN |
22 | #ifndef MTASKER_CONTEXT_HH |
23 | #define MTASKER_CONTEXT_HH | |
24 | ||
25 | #include "lazy_allocator.hh" | |
abc75058 | 26 | #include <boost/function.hpp> |
5cf909f3 AN |
27 | #include <vector> |
28 | #include <exception> | |
29 | ||
30 | struct pdns_ucontext_t { | |
31 | pdns_ucontext_t (); | |
32 | pdns_ucontext_t (pdns_ucontext_t const&) = delete; | |
33 | pdns_ucontext_t& operator= (pdns_ucontext_t const&) = delete; | |
34 | ~pdns_ucontext_t (); | |
35 | ||
36 | void* uc_mcontext; | |
37 | pdns_ucontext_t* uc_link; | |
38 | std::vector<char, lazy_allocator<char>> uc_stack; | |
39 | std::exception_ptr exception; | |
ec7fcc43 RG |
40 | #ifdef PDNS_USE_VALGRIND |
41 | int valgrind_id; | |
42 | #endif /* PDNS_USE_VALGRIND */ | |
5cf909f3 AN |
43 | }; |
44 | ||
45 | void | |
46 | pdns_swapcontext | |
47 | (pdns_ucontext_t& __restrict octx, pdns_ucontext_t const& __restrict ctx); | |
48 | ||
49 | void | |
50 | pdns_makecontext | |
abc75058 | 51 | (pdns_ucontext_t& ctx, boost::function<void(void)>& start); |
5cf909f3 | 52 | |
9c811931 RG |
53 | #ifdef HAVE_FIBER_SANITIZER |
54 | #include <sanitizer/common_interface_defs.h> | |
55 | #endif /* HAVE_FIBER_SANITIZER */ | |
56 | ||
57 | #ifdef HAVE_FIBER_SANITIZER | |
58 | extern __thread void* t_mainStack; | |
59 | extern __thread size_t t_mainStackSize; | |
60 | #endif /* HAVE_FIBER_SANITIZER */ | |
61 | ||
62 | static inline void notifyStackSwitch(void* startOfStack, size_t stackSize) | |
63 | { | |
64 | #ifdef HAVE_FIBER_SANITIZER | |
65 | __sanitizer_start_switch_fiber(nullptr, startOfStack, stackSize); | |
66 | #endif /* HAVE_FIBER_SANITIZER */ | |
67 | } | |
68 | ||
69 | static inline void notifyStackSwitchToKernel() | |
70 | { | |
71 | #ifdef HAVE_FIBER_SANITIZER | |
72 | notifyStackSwitch(t_mainStack, t_mainStackSize); | |
73 | #endif /* HAVE_FIBER_SANITIZER */ | |
74 | } | |
75 | ||
76 | static inline void notifyStackSwitchDone() | |
77 | { | |
78 | #ifdef HAVE_FIBER_SANITIZER | |
3144c8f7 | 79 | #ifdef HAVE_SANITIZER_FINISH_SWITCH_FIBER_SINGLE_PTR |
9c811931 | 80 | __sanitizer_finish_switch_fiber(nullptr); |
3144c8f7 RG |
81 | #else /* HAVE_SANITIZER_FINISH_SWITCH_FIBER_SINGLE_PTR */ |
82 | #ifdef HAVE_SANITIZER_FINISH_SWITCH_FIBER_THREE_PTRS | |
83 | __sanitizer_finish_switch_fiber(nullptr, nullptr, nullptr); | |
84 | #endif /* HAVE_SANITIZER_FINISH_SWITCH_FIBER_THREE_PTRS */ | |
85 | #endif /* HAVE_SANITIZER_FINISH_SWITCH_FIBER_SINGLE_PTR */ | |
9c811931 RG |
86 | #endif /* HAVE_FIBER_SANITIZER */ |
87 | } | |
88 | ||
89 | ||
5cf909f3 | 90 | #endif // MTASKER_CONTEXT_HH |