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) 2000-2013 Julian Seward
11      jseward@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 */
42extern Int VG_(max_signal);
43
44/* Returns the name of the vki signal sigNo */
45extern 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
51extern 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) */
55extern void VG_(poll_signals) ( ThreadId );
56
57/* Fake system calls for signal handling. */
58extern SysRes VG_(do_sys_sigaltstack) ( ThreadId tid, vki_stack_t* ss,
59                                                      vki_stack_t* oss );
60extern SysRes VG_(do_sys_sigaction)   ( Int signo,
61                                        const vki_sigaction_toK_t* new_act,
62                                        vki_sigaction_fromK_t* old_act );
63extern SysRes VG_(do_sys_sigprocmask) ( ThreadId tid, Int how,
64                                        vki_sigset_t* set,
65                                        vki_sigset_t* oldset );
66
67extern void VG_(clear_out_queued_signals)
68                  ( ThreadId tid, /* OUT */ vki_sigset_t* saved_mask );
69
70extern 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. */
75extern void VG_(synth_fault)        (ThreadId tid);
76extern void VG_(synth_fault_mapping)(ThreadId tid, Addr addr);
77extern void VG_(synth_fault_perms)  (ThreadId tid, Addr addr);
78extern void VG_(synth_sigill)       (ThreadId tid, Addr addr);
79extern void VG_(synth_sigtrap)      (ThreadId tid);
80extern void VG_(synth_sigbus)       (ThreadId tid);
81extern void VG_(synth_sigfpe)       (ThreadId tid, UInt code);
82
83/* Extend the stack to cover addr, if possible */
84extern Bool VG_(extend_stack)(Addr addr, UInt maxsize);
85
86/* Forces the client's signal handler to SIG_DFL - generally just
87   before using that signal to kill the process. */
88extern void VG_(set_default_handler)(Int sig);
89
90#endif   // __PUB_CORE_SIGNALS_H
91
92/*--------------------------------------------------------------------*/
93/*--- end                                                          ---*/
94/*--------------------------------------------------------------------*/
95