1 /* 2 Copyright (c) 2005-2021 Intel Corporation 3 4 Licensed under the Apache License, Version 2.0 (the "License"); 5 you may not use this file except in compliance with the License. 6 You may obtain a copy of the License at 7 8 http://www.apache.org/licenses/LICENSE-2.0 9 10 Unless required by applicable law or agreed to in writing, software 11 distributed under the License is distributed on an "AS IS" BASIS, 12 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 See the License for the specific language governing permissions and 14 limitations under the License. 15 */ 16 17 #include "oneapi/tbb/detail/_exception.h" 18 #include "oneapi/tbb/detail/_assert.h" 19 #include "oneapi/tbb/detail/_template_helpers.h" 20 21 #include <cstring> 22 #include <cstdio> 23 #include <stdexcept> // std::runtime_error 24 #include <new> 25 #include <stdexcept> 26 27 #define __TBB_STD_RETHROW_EXCEPTION_POSSIBLY_BROKEN \ 28 (__GLIBCXX__ && __TBB_GLIBCXX_VERSION>=40700 && __TBB_GLIBCXX_VERSION<60000 && TBB_USE_EXCEPTIONS) 29 30 #if __TBB_STD_RETHROW_EXCEPTION_POSSIBLY_BROKEN 31 // GCC ABI declarations necessary for a workaround 32 #include <cxxabi.h> 33 #endif 34 35 namespace tbb { 36 namespace detail { 37 namespace r1 { 38 39 const char* bad_last_alloc::what() const noexcept(true) { return "bad allocation in previous or concurrent attempt"; } 40 const char* user_abort::what() const noexcept(true) { return "User-initiated abort has terminated this operation"; } 41 const char* missing_wait::what() const noexcept(true) { return "wait() was not called on the structured_task_group"; } 42 43 #if TBB_USE_EXCEPTIONS 44 template <typename F> 45 /*[[noreturn]]*/ void do_throw_noexcept(F throw_func) noexcept { 46 throw_func(); 47 } 48 49 /*[[noreturn]]*/ void do_throw_noexcept(void (*throw_func)()) noexcept { 50 throw_func(); 51 #if __GNUC__ == 7 52 // In release, GCC 7 loses noexcept attribute during tail call optimization. 53 // The following statement prevents tail call optimization. 54 volatile bool reach_this_point = true; 55 suppress_unused_warning(reach_this_point); 56 #endif 57 } 58 59 bool terminate_on_exception(); // defined in global_control.cpp and ipc_server.cpp 60 61 template <typename F> 62 /*[[noreturn]]*/ void do_throw(F throw_func) { 63 if (terminate_on_exception()) { 64 do_throw_noexcept(throw_func); 65 } 66 throw_func(); 67 } 68 69 #define DO_THROW(exc, init_args) do_throw( []{ throw exc init_args; } ); 70 #else /* !TBB_USE_EXCEPTIONS */ 71 #define PRINT_ERROR_AND_ABORT(exc_name, msg) \ 72 std::fprintf (stderr, "Exception %s with message %s would have been thrown, " \ 73 "if exception handling had not been disabled. Aborting.\n", exc_name, msg); \ 74 std::fflush(stderr); \ 75 std::abort(); 76 #define DO_THROW(exc, init_args) PRINT_ERROR_AND_ABORT(#exc, #init_args) 77 #endif /* !TBB_USE_EXCEPTIONS */ 78 79 void throw_exception ( exception_id eid ) { 80 switch ( eid ) { 81 case exception_id::bad_alloc: DO_THROW(std::bad_alloc, ()); break; 82 case exception_id::bad_last_alloc: DO_THROW(bad_last_alloc, ()); break; 83 case exception_id::user_abort: DO_THROW( user_abort, () ); break; 84 case exception_id::nonpositive_step: DO_THROW(std::invalid_argument, ("Step must be positive") ); break; 85 case exception_id::out_of_range: DO_THROW(std::out_of_range, ("Index out of requested size range")); break; 86 case exception_id::reservation_length_error: DO_THROW(std::length_error, ("Attempt to exceed implementation defined length limits")); break; 87 case exception_id::missing_wait: DO_THROW(missing_wait, ()); break; 88 case exception_id::invalid_load_factor: DO_THROW(std::out_of_range, ("Invalid hash load factor")); break; 89 case exception_id::invalid_key: DO_THROW(std::out_of_range, ("invalid key")); break; 90 case exception_id::bad_tagged_msg_cast: DO_THROW(std::runtime_error, ("Illegal tagged_msg cast")); break; 91 case exception_id::unsafe_wait: DO_THROW(unsafe_wait, ("Unsafe to wait further")); break; 92 default: __TBB_ASSERT ( false, "Unknown exception ID" ); 93 } 94 __TBB_ASSERT(false, "Unreachable code"); 95 } 96 97 /* The "what" should be fairly short, not more than about 128 characters. 98 Because we control all the call sites to handle_perror, it is pointless 99 to bullet-proof it for very long strings. 100 101 Design note: ADR put this routine off to the side in tbb_misc.cpp instead of 102 Task.cpp because the throw generates a pathetic lot of code, and ADR wanted 103 this large chunk of code to be placed on a cold page. */ 104 void handle_perror( int error_code, const char* what ) { 105 const int BUF_SIZE = 255; 106 char buf[BUF_SIZE + 1] = { 0 }; 107 std::strncat(buf, what, BUF_SIZE); 108 std::size_t buf_len = std::strlen(buf); 109 if (error_code) { 110 std::strncat(buf, ": ", BUF_SIZE - buf_len); 111 buf_len = std::strlen(buf); 112 std::strncat(buf, std::strerror(error_code), BUF_SIZE - buf_len); 113 buf_len = std::strlen(buf); 114 } 115 __TBB_ASSERT(buf_len <= BUF_SIZE && buf[buf_len] == 0, nullptr); 116 #if TBB_USE_EXCEPTIONS 117 do_throw([&buf] { throw std::runtime_error(buf); }); 118 #else 119 PRINT_ERROR_AND_ABORT( "runtime_error", buf); 120 #endif /* !TBB_USE_EXCEPTIONS */ 121 } 122 123 #if __TBB_STD_RETHROW_EXCEPTION_POSSIBLY_BROKEN 124 // Runtime detection and workaround for the GCC bug 62258. 125 // The problem is that std::rethrow_exception() does not increment a counter 126 // of active exceptions, causing std::uncaught_exception() to return a wrong value. 127 // The code is created after, and roughly reflects, the workaround 128 // at https://gcc.gnu.org/bugzilla/attachment.cgi?id=34683 129 130 void fix_broken_rethrow() { 131 struct gcc_eh_data { 132 void * caughtExceptions; 133 unsigned int uncaughtExceptions; 134 }; 135 gcc_eh_data* eh_data = punned_cast<gcc_eh_data*>( abi::__cxa_get_globals() ); 136 ++eh_data->uncaughtExceptions; 137 } 138 139 bool gcc_rethrow_exception_broken() { 140 bool is_broken; 141 __TBB_ASSERT( !std::uncaught_exception(), 142 "gcc_rethrow_exception_broken() must not be called when an exception is active" ); 143 try { 144 // Throw, catch, and rethrow an exception 145 try { 146 throw __TBB_GLIBCXX_VERSION; 147 } catch(...) { 148 std::rethrow_exception( std::current_exception() ); 149 } 150 } catch(...) { 151 // Check the bug presence 152 is_broken = std::uncaught_exception(); 153 } 154 if( is_broken ) fix_broken_rethrow(); 155 __TBB_ASSERT( !std::uncaught_exception(), nullptr); 156 return is_broken; 157 } 158 #else 159 void fix_broken_rethrow() {} 160 bool gcc_rethrow_exception_broken() { return false; } 161 #endif /* __TBB_STD_RETHROW_EXCEPTION_POSSIBLY_BROKEN */ 162 163 } // namespace r1 164 } // namespace detail 165 } // namespace tbb 166 167