lldb/source/Plugins/Process/Utility/LinuxSignals.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-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "LinuxSignals.h"
  10
  11 #ifdef __linux__
  12 #include <csignal>
  13
  14 #ifndef SEGV_BNDERR
  15 #define SEGV_BNDERR 3
  16 #endif
  17 #ifndef SEGV_MTEAERR
  18 #define SEGV_MTEAERR 8
  19 #endif
  20 #ifndef SEGV_MTESERR
  21 #define SEGV_MTESERR 9
  22 #endif
  23
  24 #define ADD_SIGCODE(signal_name, signal_value, code_name, code_value, ...)     \
  25   static_assert(signal_name == signal_value,                                   \
  26                 "Value mismatch for signal number " #signal_name);             \
  27   static_assert(code_name == code_value,                                       \
  28                 "Value mismatch for signal code " #code_name);                 \
  29   AddSignalCode(signal_value, code_value, __VA_ARGS__)
  30 #else
  31 #define ADD_SIGCODE(signal_name, signal_value, code_name, code_value, ...)     \
  32   AddSignalCode(signal_value, code_value, __VA_ARGS__)
  33 #endif /* ifdef __linux__ */
  34
  35 using namespace lldb_private;
  36
  37 LinuxSignals::LinuxSignals() : UnixSignals() { Reset(); }
  38
  39 void LinuxSignals::Reset() {
  40   m_signals.clear();
  41   // clang-format off
  42   //        SIGNO   NAME            SUPPRESS  STOP    NOTIFY  DESCRIPTION
  43   //        ======  ==============  ========  ======  ======  ===================================================
  44   AddSignal(1,      "SIGHUP",       false,    true,   true,   "hangup");
  45   AddSignal(2,      "SIGINT",       true,     true,   true,   "interrupt");
  46   AddSignal(3,      "SIGQUIT",      false,    true,   true,   "quit");
  47
  48   AddSignal(4,      "SIGILL",       false,    true,   true,   "illegal instruction");
  49   ADD_SIGCODE(SIGILL, 4, ILL_ILLOPC, 1, "illegal opcode");
  50   ADD_SIGCODE(SIGILL, 4, ILL_ILLOPN, 2, "illegal operand");
  51   ADD_SIGCODE(SIGILL, 4, ILL_ILLADR, 3, "illegal addressing mode");
  52   ADD_SIGCODE(SIGILL, 4, ILL_ILLTRP, 4, "illegal trap");
  53   ADD_SIGCODE(SIGILL, 4, ILL_PRVOPC, 5, "privileged opcode");
  54   ADD_SIGCODE(SIGILL, 4, ILL_PRVREG, 6, "privileged register");
  55   ADD_SIGCODE(SIGILL, 4, ILL_COPROC, 7, "coprocessor error");
  56   ADD_SIGCODE(SIGILL, 4, ILL_BADSTK, 8, "internal stack error");
  57
  58   AddSignal(5,      "SIGTRAP",      true,     true,   true,   "trace trap (not reset when caught)");
  59   AddSignal(6,      "SIGABRT",      false,    true,   true,   "abort()/IOT trap", "SIGIOT");
  60
  61   AddSignal(7,      "SIGBUS",       false,    true,   true,   "bus error");
  62   ADD_SIGCODE(SIGBUS, 7, BUS_ADRALN, 1, "illegal alignment");
  63   ADD_SIGCODE(SIGBUS, 7, BUS_ADRERR, 2, "illegal address");
  64   ADD_SIGCODE(SIGBUS, 7, BUS_OBJERR, 3, "hardware error");
  65
  66   AddSignal(8,      "SIGFPE",       false,    true,   true,   "floating point exception");
  67   ADD_SIGCODE(SIGFPE, 8, FPE_INTDIV, 1, "integer divide by zero");
  68   ADD_SIGCODE(SIGFPE, 8, FPE_INTOVF, 2, "integer overflow");
  69   ADD_SIGCODE(SIGFPE, 8, FPE_FLTDIV, 3, "floating point divide by zero");
  70   ADD_SIGCODE(SIGFPE, 8, FPE_FLTOVF, 4, "floating point overflow");
  71   ADD_SIGCODE(SIGFPE, 8, FPE_FLTUND, 5, "floating point underflow");
  72   ADD_SIGCODE(SIGFPE, 8, FPE_FLTRES, 6, "floating point inexact result");
  73   ADD_SIGCODE(SIGFPE, 8, FPE_FLTINV, 7, "floating point invalid operation");
  74   ADD_SIGCODE(SIGFPE, 8, FPE_FLTSUB, 8, "subscript out of range");
  75
  76   AddSignal(9,      "SIGKILL",      false,    true,   true,   "kill");
  77   AddSignal(10,     "SIGUSR1",      false,    true,   true,   "user defined signal 1");
  78
  79   AddSignal(11,     "SIGSEGV",      false,    true,   true,   "segmentation violation");
  80   ADD_SIGCODE(SIGSEGV, 11, SEGV_MAPERR,  1, "address not mapped to object", SignalCodePrintOption::Address);
  81   ADD_SIGCODE(SIGSEGV, 11, SEGV_ACCERR,  2, "invalid permissions for mapped object", SignalCodePrintOption::Address);
  82   ADD_SIGCODE(SIGSEGV, 11, SEGV_BNDERR,  3, "failed address bounds checks", SignalCodePrintOption::Bounds);
  83   ADD_SIGCODE(SIGSEGV, 11, SEGV_MTEAERR, 8, "async tag check fault");
  84   ADD_SIGCODE(SIGSEGV, 11, SEGV_MTESERR, 9, "sync tag check fault", SignalCodePrintOption::Address);
  85   // Some platforms will occasionally send nonstandard spurious SI_KERNEL
  86   // codes. One way to get this is via unaligned SIMD loads. Treat it as invalid address.
  87   ADD_SIGCODE(SIGSEGV, 11, SI_KERNEL, 0x80, "invalid address", SignalCodePrintOption::Address);
  88
  89   AddSignal(12,     "SIGUSR2",      false,    true,   true,   "user defined signal 2");
  90   AddSignal(13,     "SIGPIPE",      false,    true,   true,   "write to pipe with reading end closed");
  91   AddSignal(14,     "SIGALRM",      false,    false,  false,  "alarm");
  92   AddSignal(15,     "SIGTERM",      false,    true,   true,   "termination requested");
  93   AddSignal(16,     "SIGSTKFLT",    false,    true,   true,   "stack fault");
  94   AddSignal(17,     "SIGCHLD",      false,    false,  true,   "child status has changed", "SIGCLD");
  95   AddSignal(18,     "SIGCONT",      false,    false,  true,   "process continue");
  96   AddSignal(19,     "SIGSTOP",      true,     true,   true,   "process stop");
  97   AddSignal(20,     "SIGTSTP",      false,    true,   true,   "tty stop");
  98   AddSignal(21,     "SIGTTIN",      false,    true,   true,   "background tty read");
  99   AddSignal(22,     "SIGTTOU",      false,    true,   true,   "background tty write");
 100   AddSignal(23,     "SIGURG",       false,    true,   true,   "urgent data on socket");
 101   AddSignal(24,     "SIGXCPU",      false,    true,   true,   "CPU resource exceeded");
 102   AddSignal(25,     "SIGXFSZ",      false,    true,   true,   "file size limit exceeded");
 103   AddSignal(26,     "SIGVTALRM",    false,    true,   true,   "virtual time alarm");
 104   AddSignal(27,     "SIGPROF",      false,    false,  false,  "profiling time alarm");
 105   AddSignal(28,     "SIGWINCH",     false,    true,   true,   "window size changes");
 106   AddSignal(29,     "SIGIO",        false,    true,   true,   "input/output ready/Pollable event", "SIGPOLL");
 107   AddSignal(30,     "SIGPWR",       false,    true,   true,   "power failure");
 108   AddSignal(31,     "SIGSYS",       false,    true,   true,   "invalid system call");
 109   AddSignal(32,     "SIG32",        false,    false,  false,  "threading library internal signal 1");
 110   AddSignal(33,     "SIG33",        false,    false,  false,  "threading library internal signal 2");
 111   AddSignal(34,     "SIGRTMIN",     false,    false,  false,  "real time signal 0");
 112   AddSignal(35,     "SIGRTMIN+1",   false,    false,  false,  "real time signal 1");
 113   AddSignal(36,     "SIGRTMIN+2",   false,    false,  false,  "real time signal 2");
 114   AddSignal(37,     "SIGRTMIN+3",   false,    false,  false,  "real time signal 3");
 115   AddSignal(38,     "SIGRTMIN+4",   false,    false,  false,  "real time signal 4");
 116   AddSignal(39,     "SIGRTMIN+5",   false,    false,  false,  "real time signal 5");
 117   AddSignal(40,     "SIGRTMIN+6",   false,    false,  false,  "real time signal 6");
 118   AddSignal(41,     "SIGRTMIN+7",   false,    false,  false,  "real time signal 7");
 119   AddSignal(42,     "SIGRTMIN+8",   false,    false,  false,  "real time signal 8");
 120   AddSignal(43,     "SIGRTMIN+9",   false,    false,  false,  "real time signal 9");
 121   AddSignal(44,     "SIGRTMIN+10",  false,    false,  false,  "real time signal 10");
 122   AddSignal(45,     "SIGRTMIN+11",  false,    false,  false,  "real time signal 11");
 123   AddSignal(46,     "SIGRTMIN+12",  false,    false,  false,  "real time signal 12");
 124   AddSignal(47,     "SIGRTMIN+13",  false,    false,  false,  "real time signal 13");
 125   AddSignal(48,     "SIGRTMIN+14",  false,    false,  false,  "real time signal 14");
 126   AddSignal(49,     "SIGRTMIN+15",  false,    false,  false,  "real time signal 15");
 127   AddSignal(50,     "SIGRTMAX-14",  false,    false,  false,  "real time signal 16"); // switching to SIGRTMAX-xxx to match "kill -l" output
 128   AddSignal(51,     "SIGRTMAX-13",  false,    false,  false,  "real time signal 17");
 129   AddSignal(52,     "SIGRTMAX-12",  false,    false,  false,  "real time signal 18");
 130   AddSignal(53,     "SIGRTMAX-11",  false,    false,  false,  "real time signal 19");
 131   AddSignal(54,     "SIGRTMAX-10",  false,    false,  false,  "real time signal 20");
 132   AddSignal(55,     "SIGRTMAX-9",   false,    false,  false,  "real time signal 21");
 133   AddSignal(56,     "SIGRTMAX-8",   false,    false,  false,  "real time signal 22");
 134   AddSignal(57,     "SIGRTMAX-7",   false,    false,  false,  "real time signal 23");
 135   AddSignal(58,     "SIGRTMAX-6",   false,    false,  false,  "real time signal 24");
 136   AddSignal(59,     "SIGRTMAX-5",   false,    false,  false,  "real time signal 25");
 137   AddSignal(60,     "SIGRTMAX-4",   false,    false,  false,  "real time signal 26");
 138   AddSignal(61,     "SIGRTMAX-3",   false,    false,  false,  "real time signal 27");
 139   AddSignal(62,     "SIGRTMAX-2",   false,    false,  false,  "real time signal 28");
 140   AddSignal(63,     "SIGRTMAX-1",   false,    false,  false,  "real time signal 29");
 141   AddSignal(64,     "SIGRTMAX",     false,    false,  false,  "real time signal 30");
 142   // clang-format on
 143 }