1 // 2 // Copyright 2018 The Abseil Authors. 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 // https://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 // Helper function for measuring stack consumption of signal handlers. 17 18 #ifndef ABSL_DEBUGGING_INTERNAL_STACK_CONSUMPTION_H_ 19 #define ABSL_DEBUGGING_INTERNAL_STACK_CONSUMPTION_H_ 20 21 #include "absl/base/config.h" 22 23 // The code in this module is not portable. 24 // Use this feature test macro to detect its availability. 25 #ifdef ABSL_INTERNAL_HAVE_DEBUGGING_STACK_CONSUMPTION 26 #error ABSL_INTERNAL_HAVE_DEBUGGING_STACK_CONSUMPTION cannot be set directly 27 #elif !defined(__APPLE__) && !defined(_WIN32) && \ 28 (defined(__i386__) || defined(__x86_64__) || defined(__ppc__) || \ 29 defined(__aarch64__)) 30 #define ABSL_INTERNAL_HAVE_DEBUGGING_STACK_CONSUMPTION 1 31 32 namespace absl { 33 ABSL_NAMESPACE_BEGIN 34 namespace debugging_internal { 35 36 // Returns the stack consumption in bytes for the code exercised by 37 // signal_handler. To measure stack consumption, signal_handler is registered 38 // as a signal handler, so the code that it exercises must be async-signal 39 // safe. The argument of signal_handler is an implementation detail of signal 40 // handlers and should ignored by the code for signal_handler. Use global 41 // variables to pass information between your test code and signal_handler. 42 int GetSignalHandlerStackConsumption(void (*signal_handler)(int)); 43 44 } // namespace debugging_internal 45 ABSL_NAMESPACE_END 46 } // namespace absl 47 48 #endif // ABSL_INTERNAL_HAVE_DEBUGGING_STACK_CONSUMPTION 49 50 #endif // ABSL_DEBUGGING_INTERNAL_STACK_CONSUMPTION_H_ 51