202 lines · cpp
1//===-- LinuxSignals.cpp --------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#include "LinuxSignals.h"10 11// mips-linux debugging is not supported and mips uses different numbers for12// some signals (e.g. SIGBUS) on linux, so we skip the static checks below. The13// definitions here can be used for debugging non-mips targets on a mips-hosted14// lldb.15#if defined(__linux__) && !defined(__mips__)16#include <csignal>17 18#ifndef SEGV_BNDERR19#define SEGV_BNDERR 320#endif21#ifndef SEGV_MTEAERR22#define SEGV_MTEAERR 823#endif24#ifndef SEGV_MTESERR25#define SEGV_MTESERR 926#endif27#ifndef SEGV_CPERR28#define SEGV_CPERR 1029#endif30#ifndef SI_QUEUE31#define SI_QUEUE -132#endif33#ifndef SI_TIMER34#define SI_TIMER -235#endif36#ifndef SI_MESGQ37#define SI_MESGQ -338#endif39#ifndef SI_ASYNCIO40#define SI_ASYNCIO -441#endif42#ifndef SI_SIGIO43#define SI_SIGIO -544#endif45#ifndef SI_TKILL46#define SI_TKILL -647#endif48#ifndef SI_DETHREAD49#define SI_DETHREAD -750#endif51#ifndef SI_ASYNCNL52#define SI_ASYNCNL -6053#endif54 55#define ADD_SIGCODE(signal_name, signal_value, code_name, code_value, ...) \56 static_assert(signal_name == signal_value, \57 "Value mismatch for signal number " #signal_name); \58 static_assert(code_name == code_value, \59 "Value mismatch for signal code " #code_name); \60 AddSignalCode(signal_value, code_value, __VA_ARGS__)61#else62#define ADD_SIGCODE(signal_name, signal_value, code_name, code_value, ...) \63 AddSignalCode(signal_value, code_value, __VA_ARGS__)64#endif /* if defined(__linux__) && !defined(__mips__) */65// See siginfo.h in the Linux Kernel, these codes can be sent for any signal.66#define ADD_LINUX_SIGNAL(signo, name, ...) \67 AddSignal(signo, name, __VA_ARGS__); \68 ADD_SIGCODE(signo, signo, SI_USER, 0, "sent by kill, sigsend or raise", \69 SignalCodePrintOption::Sender); \70 ADD_SIGCODE(signo, signo, SI_KERNEL, 0x80, "sent by kernel (SI_KERNEL)", \71 SignalCodePrintOption::Sender); \72 ADD_SIGCODE(signo, signo, SI_QUEUE, -1, "sent by sigqueue", \73 SignalCodePrintOption::Sender); \74 ADD_SIGCODE(signo, signo, SI_TIMER, -2, "sent by timer expiration", \75 SignalCodePrintOption::Sender); \76 ADD_SIGCODE(signo, signo, SI_MESGQ, -3, \77 "sent by real time mesq state change", \78 SignalCodePrintOption::Sender); \79 ADD_SIGCODE(signo, signo, SI_ASYNCIO, -4, "sent by AIO completion", \80 SignalCodePrintOption::Sender); \81 ADD_SIGCODE(signo, signo, SI_SIGIO, -5, "sent by queued SIGIO", \82 SignalCodePrintOption::Sender); \83 ADD_SIGCODE(signo, signo, SI_TKILL, -6, "sent by tkill system call", \84 SignalCodePrintOption::Sender); \85 ADD_SIGCODE(signo, signo, SI_DETHREAD, -7, \86 "sent by execve() killing subsidiary threads", \87 SignalCodePrintOption::Sender); \88 ADD_SIGCODE(signo, signo, SI_ASYNCNL, -60, \89 "sent by glibc async name lookup completion", \90 SignalCodePrintOption::Sender);91 92using namespace lldb_private;93 94LinuxSignals::LinuxSignals() : UnixSignals() { Reset(); }95 96void LinuxSignals::Reset() {97 m_signals.clear();98 // clang-format off99 // SIGNO NAME SUPPRESS STOP NOTIFY DESCRIPTION100 // ====== ============== ======== ====== ====== ===================================================101 ADD_LINUX_SIGNAL(1, "SIGHUP", false, true, true, "hangup");102 ADD_LINUX_SIGNAL(2, "SIGINT", true, true, true, "interrupt");103 ADD_LINUX_SIGNAL(3, "SIGQUIT", false, true, true, "quit");104 105 ADD_LINUX_SIGNAL(4, "SIGILL", false, true, true, "illegal instruction");106 ADD_SIGCODE(SIGILL, 4, ILL_ILLOPC, 1, "illegal opcode");107 ADD_SIGCODE(SIGILL, 4, ILL_ILLOPN, 2, "illegal operand");108 ADD_SIGCODE(SIGILL, 4, ILL_ILLADR, 3, "illegal addressing mode");109 ADD_SIGCODE(SIGILL, 4, ILL_ILLTRP, 4, "illegal trap");110 ADD_SIGCODE(SIGILL, 4, ILL_PRVOPC, 5, "privileged opcode");111 ADD_SIGCODE(SIGILL, 4, ILL_PRVREG, 6, "privileged register");112 ADD_SIGCODE(SIGILL, 4, ILL_COPROC, 7, "coprocessor error");113 ADD_SIGCODE(SIGILL, 4, ILL_BADSTK, 8, "internal stack error");114 115 ADD_LINUX_SIGNAL(5, "SIGTRAP", true, true, true, "trace trap (not reset when caught)");116 ADD_LINUX_SIGNAL(6, "SIGABRT", false, true, true, "abort()/IOT trap", "SIGIOT");117 118 ADD_LINUX_SIGNAL(7, "SIGBUS", false, true, true, "bus error");119 ADD_SIGCODE(SIGBUS, 7, BUS_ADRALN, 1, "illegal alignment");120 ADD_SIGCODE(SIGBUS, 7, BUS_ADRERR, 2, "illegal address");121 ADD_SIGCODE(SIGBUS, 7, BUS_OBJERR, 3, "hardware error");122 123 ADD_LINUX_SIGNAL(8, "SIGFPE", false, true, true, "floating point exception");124 ADD_SIGCODE(SIGFPE, 8, FPE_INTDIV, 1, "integer divide by zero");125 ADD_SIGCODE(SIGFPE, 8, FPE_INTOVF, 2, "integer overflow");126 ADD_SIGCODE(SIGFPE, 8, FPE_FLTDIV, 3, "floating point divide by zero");127 ADD_SIGCODE(SIGFPE, 8, FPE_FLTOVF, 4, "floating point overflow");128 ADD_SIGCODE(SIGFPE, 8, FPE_FLTUND, 5, "floating point underflow");129 ADD_SIGCODE(SIGFPE, 8, FPE_FLTRES, 6, "floating point inexact result");130 ADD_SIGCODE(SIGFPE, 8, FPE_FLTINV, 7, "floating point invalid operation");131 ADD_SIGCODE(SIGFPE, 8, FPE_FLTSUB, 8, "subscript out of range");132 133 ADD_LINUX_SIGNAL(9, "SIGKILL", false, true, true, "kill");134 ADD_LINUX_SIGNAL(10, "SIGUSR1", false, true, true, "user defined signal 1");135 136 ADD_LINUX_SIGNAL(11, "SIGSEGV", false, true, true, "segmentation violation");137 ADD_SIGCODE(SIGSEGV, 11, SEGV_MAPERR, 1, "address not mapped to object", SignalCodePrintOption::Address);138 ADD_SIGCODE(SIGSEGV, 11, SEGV_ACCERR, 2, "invalid permissions for mapped object", SignalCodePrintOption::Address);139 ADD_SIGCODE(SIGSEGV, 11, SEGV_BNDERR, 3, "failed address bounds checks", SignalCodePrintOption::Bounds);140 ADD_SIGCODE(SIGSEGV, 11, SEGV_MTEAERR, 8, "async tag check fault");141 ADD_SIGCODE(SIGSEGV, 11, SEGV_MTESERR, 9, "sync tag check fault", SignalCodePrintOption::Address);142 ADD_SIGCODE(SIGSEGV, 11, SEGV_CPERR, 10, "control protection fault");143 // Some platforms will occasionally send nonstandard spurious SI_KERNEL144 // codes. One way to get this is via unaligned SIMD loads. Treat it as invalid address.145 ADD_SIGCODE(SIGSEGV, 11, SI_KERNEL, 0x80, "invalid address", SignalCodePrintOption::Address);146 147 ADD_LINUX_SIGNAL(12, "SIGUSR2", false, true, true, "user defined signal 2");148 ADD_LINUX_SIGNAL(13, "SIGPIPE", false, true, true, "write to pipe with reading end closed");149 ADD_LINUX_SIGNAL(14, "SIGALRM", false, false, false, "alarm");150 ADD_LINUX_SIGNAL(15, "SIGTERM", false, true, true, "termination requested");151 ADD_LINUX_SIGNAL(16, "SIGSTKFLT", false, true, true, "stack fault");152 ADD_LINUX_SIGNAL(17, "SIGCHLD", false, false, true, "child status has changed", "SIGCLD");153 ADD_LINUX_SIGNAL(18, "SIGCONT", false, false, true, "process continue");154 ADD_LINUX_SIGNAL(19, "SIGSTOP", true, true, true, "process stop");155 ADD_LINUX_SIGNAL(20, "SIGTSTP", false, true, true, "tty stop");156 ADD_LINUX_SIGNAL(21, "SIGTTIN", false, true, true, "background tty read");157 ADD_LINUX_SIGNAL(22, "SIGTTOU", false, true, true, "background tty write");158 ADD_LINUX_SIGNAL(23, "SIGURG", false, true, true, "urgent data on socket");159 ADD_LINUX_SIGNAL(24, "SIGXCPU", false, true, true, "CPU resource exceeded");160 ADD_LINUX_SIGNAL(25, "SIGXFSZ", false, true, true, "file size limit exceeded");161 ADD_LINUX_SIGNAL(26, "SIGVTALRM", false, true, true, "virtual time alarm");162 ADD_LINUX_SIGNAL(27, "SIGPROF", false, false, false, "profiling time alarm");163 ADD_LINUX_SIGNAL(28, "SIGWINCH", false, false, false, "window size changes");164 ADD_LINUX_SIGNAL(29, "SIGIO", false, true, true, "input/output ready/Pollable event", "SIGPOLL");165 ADD_LINUX_SIGNAL(30, "SIGPWR", false, true, true, "power failure");166 ADD_LINUX_SIGNAL(31, "SIGSYS", false, true, true, "invalid system call");167 ADD_LINUX_SIGNAL(32, "SIG32", false, false, false, "threading library internal signal 1");168 ADD_LINUX_SIGNAL(33, "SIG33", false, false, false, "threading library internal signal 2");169 ADD_LINUX_SIGNAL(34, "SIGRTMIN", false, false, false, "real time signal 0");170 ADD_LINUX_SIGNAL(35, "SIGRTMIN+1", false, false, false, "real time signal 1");171 ADD_LINUX_SIGNAL(36, "SIGRTMIN+2", false, false, false, "real time signal 2");172 ADD_LINUX_SIGNAL(37, "SIGRTMIN+3", false, false, false, "real time signal 3");173 ADD_LINUX_SIGNAL(38, "SIGRTMIN+4", false, false, false, "real time signal 4");174 ADD_LINUX_SIGNAL(39, "SIGRTMIN+5", false, false, false, "real time signal 5");175 ADD_LINUX_SIGNAL(40, "SIGRTMIN+6", false, false, false, "real time signal 6");176 ADD_LINUX_SIGNAL(41, "SIGRTMIN+7", false, false, false, "real time signal 7");177 ADD_LINUX_SIGNAL(42, "SIGRTMIN+8", false, false, false, "real time signal 8");178 ADD_LINUX_SIGNAL(43, "SIGRTMIN+9", false, false, false, "real time signal 9");179 ADD_LINUX_SIGNAL(44, "SIGRTMIN+10", false, false, false, "real time signal 10");180 ADD_LINUX_SIGNAL(45, "SIGRTMIN+11", false, false, false, "real time signal 11");181 ADD_LINUX_SIGNAL(46, "SIGRTMIN+12", false, false, false, "real time signal 12");182 ADD_LINUX_SIGNAL(47, "SIGRTMIN+13", false, false, false, "real time signal 13");183 ADD_LINUX_SIGNAL(48, "SIGRTMIN+14", false, false, false, "real time signal 14");184 ADD_LINUX_SIGNAL(49, "SIGRTMIN+15", false, false, false, "real time signal 15");185 ADD_LINUX_SIGNAL(50, "SIGRTMAX-14", false, false, false, "real time signal 16"); // switching to SIGRTMAX-xxx to match "kill -l" output186 ADD_LINUX_SIGNAL(51, "SIGRTMAX-13", false, false, false, "real time signal 17");187 ADD_LINUX_SIGNAL(52, "SIGRTMAX-12", false, false, false, "real time signal 18");188 ADD_LINUX_SIGNAL(53, "SIGRTMAX-11", false, false, false, "real time signal 19");189 ADD_LINUX_SIGNAL(54, "SIGRTMAX-10", false, false, false, "real time signal 20");190 ADD_LINUX_SIGNAL(55, "SIGRTMAX-9", false, false, false, "real time signal 21");191 ADD_LINUX_SIGNAL(56, "SIGRTMAX-8", false, false, false, "real time signal 22");192 ADD_LINUX_SIGNAL(57, "SIGRTMAX-7", false, false, false, "real time signal 23");193 ADD_LINUX_SIGNAL(58, "SIGRTMAX-6", false, false, false, "real time signal 24");194 ADD_LINUX_SIGNAL(59, "SIGRTMAX-5", false, false, false, "real time signal 25");195 ADD_LINUX_SIGNAL(60, "SIGRTMAX-4", false, false, false, "real time signal 26");196 ADD_LINUX_SIGNAL(61, "SIGRTMAX-3", false, false, false, "real time signal 27");197 ADD_LINUX_SIGNAL(62, "SIGRTMAX-2", false, false, false, "real time signal 28");198 ADD_LINUX_SIGNAL(63, "SIGRTMAX-1", false, false, false, "real time signal 29");199 ADD_LINUX_SIGNAL(64, "SIGRTMAX", false, false, false, "real time signal 30");200 // clang-format on201}202