projects / thirdparty / pdns.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 |