1 2 /*--------------------------------------------------------------------*/ 3 /*--- POSIX signals. pub_core_signals.h ---*/ 4 /*--------------------------------------------------------------------*/ 5 6 /* 7 This file is part of Valgrind, a dynamic binary instrumentation 8 framework. 9 10 Copyright (C) 2000-2017 Julian Seward 11 jseward (at) acm.org 12 13 This program is free software; you can redistribute it and/or 14 modify it under the terms of the GNU General Public License as 15 published by the Free Software Foundation; either version 2 of the 16 License, or (at your option) any later version. 17 18 This program is distributed in the hope that it will be useful, but 19 WITHOUT ANY WARRANTY; without even the implied warranty of 20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 21 General Public License for more details. 22 23 You should have received a copy of the GNU General Public License 24 along with this program; if not, write to the Free Software 25 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 26 02111-1307, USA. 27 28 The GNU General Public License is contained in the file COPYING. 29 */ 30 31 #ifndef __PUB_CORE_SIGNALS_H 32 #define __PUB_CORE_SIGNALS_H 33 34 //-------------------------------------------------------------------- 35 // PURPOSE: This module implements all the signal handling stuff. 36 //-------------------------------------------------------------------- 37 38 #include "pub_tool_signals.h" // I want to get rid of this header... 39 #include "pub_core_vki.h" // vki_sigset_t et al. 40 41 /* Highest signal the kernel will let us use */ 42 extern Int VG_(max_signal); 43 44 /* Returns the name of the vki signal sigNo */ 45 extern const HChar *VG_(signame)(Int sigNo); 46 47 /* Use high signals because native pthreads wants to use low */ 48 #define VG_SIGVGKILL (VG_(max_signal)-0) 49 #define VG_SIGVGRTUSERMAX (VG_(max_signal)-1) 50 51 extern void VG_(sigstartup_actions) ( void ); 52 53 /* Poll a thread's set of pending signals, and update the Thread's 54 context to deliver one (viz, create signal frames if needed) */ 55 extern void VG_(poll_signals) ( ThreadId ); 56 57 /* Fake system calls for signal handling. */ 58 extern SysRes VG_(do_sys_sigaltstack) ( ThreadId tid, vki_stack_t* ss, 59 vki_stack_t* oss ); 60 extern SysRes VG_(do_sys_sigaction) ( Int signo, 61 const vki_sigaction_toK_t* new_act, 62 vki_sigaction_fromK_t* old_act ); 63 extern SysRes VG_(do_sys_sigprocmask) ( ThreadId tid, Int how, 64 vki_sigset_t* set, 65 vki_sigset_t* oldset ); 66 67 extern void VG_(clear_out_queued_signals) 68 ( ThreadId tid, /* OUT */ vki_sigset_t* saved_mask ); 69 70 extern void VG_(kill_self)(Int sigNo); 71 72 /* These function synthesize a fault, as if the running instruction 73 had had a fault. These functions do not return - they longjmp back 74 into the scheduler so the signal can be delivered. */ 75 extern void VG_(synth_fault) (ThreadId tid); 76 extern void VG_(synth_fault_mapping)(ThreadId tid, Addr addr); 77 extern void VG_(synth_fault_perms) (ThreadId tid, Addr addr); 78 extern void VG_(synth_sigill) (ThreadId tid, Addr addr); 79 extern void VG_(synth_sigtrap) (ThreadId tid); 80 extern void VG_(synth_sigbus) (ThreadId tid); 81 extern void VG_(synth_sigfpe) (ThreadId tid, UInt code); 82 83 /* Extend the stack to cover addr, if possible */ 84 extern Bool VG_(extend_stack)(ThreadId tid, Addr addr); 85 86 /* Forces the client's signal handler to SIG_DFL - generally just 87 before using that signal to kill the process. */ 88 extern void VG_(set_default_handler)(Int sig); 89 90 #endif // __PUB_CORE_SIGNALS_H 91 92 /*--------------------------------------------------------------------*/ 93 /*--- end ---*/ 94 /*--------------------------------------------------------------------*/ 95
