1 /* 2 * Copyright 2016 The Android Open Source Project 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 #pragma once 18 19 #include <signal.h> 20 #include <stdint.h> 21 #include <sys/cdefs.h> 22 #include <sys/types.h> 23 24 __BEGIN_DECLS 25 26 // These callbacks are called in a signal handler, and thus must be async signal safe. 27 // If null, the callbacks will not be called. 28 typedef struct { 29 struct abort_msg_t* (*get_abort_message)(); 30 void (*post_dump)(); 31 } debuggerd_callbacks_t; 32 33 void debuggerd_init(debuggerd_callbacks_t* callbacks); 34 35 // DEBUGGER_ACTION_DUMP_TOMBSTONE and DEBUGGER_ACTION_DUMP_BACKTRACE are both 36 // triggered via DEBUGGER_SIGNAL. The debugger_action_t is sent via si_value 37 // using sigqueue(2) or equivalent. If no si_value is specified (e.g. if the 38 // signal is sent by kill(2)), the default behavior is to print the backtrace 39 // to the log. 40 #define DEBUGGER_SIGNAL (__SIGRTMIN + 3) 41 42 static void __attribute__((__unused__)) debuggerd_register_handlers(struct sigaction* action) { 43 sigaction(SIGABRT, action, nullptr); 44 sigaction(SIGBUS, action, nullptr); 45 sigaction(SIGFPE, action, nullptr); 46 sigaction(SIGILL, action, nullptr); 47 sigaction(SIGSEGV, action, nullptr); 48 #if defined(SIGSTKFLT) 49 sigaction(SIGSTKFLT, action, nullptr); 50 #endif 51 sigaction(SIGSYS, action, nullptr); 52 sigaction(SIGTRAP, action, nullptr); 53 sigaction(DEBUGGER_SIGNAL, action, nullptr); 54 } 55 56 __END_DECLS 57
