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llvm-project/lldb/source/Plugins/Process/Utility/LinuxSignals.cpp
David Spickett 0107513fe7 [lldb] Implement CrashReason using UnixSignals 
By adding signal codes to UnixSignals and adding a new function
where you can get a string with optional address and bounds.

Added signal codes to the Linux, FreeBSD and NetBSD signal sets.
I've checked the numbers against the relevant sources.

Each signal code has a code number, description and printing options.
By default you just get the descripton, you can opt into adding either
a fault address or bounds information.

Bounds signals we'll use the description, unless we have the bounds
values in which case we say whether it is an upper or lower bound
issue.

GetCrashReasonString remains in CrashReason because we need it to
be compiled only for platforms with siginfo_t. Ideally it would
move into NativeProcessProtocol, but that is also used
by NativeRegisterContextWindows, where there would be no siginfo_t.

Reviewed By: JDevlieghere

Differential Revision: https://reviews.llvm.org/D146044
2023-03-20 11:39:32 +00:00

120 lines
8.1 KiB
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//===-- LinuxSignals.cpp --------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "LinuxSignals.h"
using namespace lldb_private;
LinuxSignals::LinuxSignals() : UnixSignals() { Reset(); }
void LinuxSignals::Reset() {
m_signals.clear();
// clang-format off
// SIGNO NAME SUPPRESS STOP NOTIFY DESCRIPTION
// ====== ============== ======== ====== ====== ===================================================
AddSignal(1, "SIGHUP", false, true, true, "hangup");
AddSignal(2, "SIGINT", true, true, true, "interrupt");
AddSignal(3, "SIGQUIT", false, true, true, "quit");
AddSignal(4, "SIGILL", false, true, true, "illegal instruction");
AddSignalCode(4, 1 /*ILL_ILLOPC*/, "illegal opcode");
AddSignalCode(4, 2 /*ILL_ILLOPN*/, "illegal operand");
AddSignalCode(4, 3 /*ILL_ILLADR*/, "illegal addressing mode");
AddSignalCode(4, 4 /*ILL_ILLTRP*/, "illegal trap");
AddSignalCode(4, 5 /*ILL_PRVOPC*/, "privileged opcode");
AddSignalCode(4, 6 /*ILL_PRVREG*/, "privileged register");
AddSignalCode(4, 7 /*ILL_COPROC*/, "coprocessor error");
AddSignalCode(4, 8 /*ILL_BADSTK*/, "internal stack error");
AddSignal(5, "SIGTRAP", true, true, true, "trace trap (not reset when caught)");
AddSignal(6, "SIGABRT", false, true, true, "abort()/IOT trap", "SIGIOT");
AddSignal(7, "SIGBUS", false, true, true, "bus error");
AddSignalCode(7, 1 /*BUS_ADRALN*/, "illegal alignment");
AddSignalCode(7, 2 /*BUS_ADRERR*/, "illegal address");
AddSignalCode(7, 3 /*BUS_OBJERR*/, "hardware error");
AddSignal(8, "SIGFPE", false, true, true, "floating point exception");
AddSignalCode(8, 1 /*FPE_INTDIV*/, "integer divide by zero");
AddSignalCode(8, 2 /*FPE_INTOVF*/, "integer overflow");
AddSignalCode(8, 3 /*FPE_FLTDIV*/, "floating point divide by zero");
AddSignalCode(8, 4 /*FPE_FLTOVF*/, "floating point overflow");
AddSignalCode(8, 5 /*FPE_FLTUND*/, "floating point underflow");
AddSignalCode(8, 6 /*FPE_FLTRES*/, "floating point inexact result");
AddSignalCode(8, 7 /*FPE_FLTINV*/, "floating point invalid operation");
AddSignalCode(8, 8 /*FPE_FLTSUB*/, "subscript out of range");
AddSignal(9, "SIGKILL", false, true, true, "kill");
AddSignal(10, "SIGUSR1", false, true, true, "user defined signal 1");
AddSignal(11, "SIGSEGV", false, true, true, "segmentation violation");
AddSignalCode(11, 1 /*SEGV_MAPERR*/, "address not mapped to object", SignalCodePrintOption::Address);
AddSignalCode(11, 2 /*SEGV_ACCERR*/, "invalid permissions for mapped object", SignalCodePrintOption::Address);
AddSignalCode(11, 3 /*SEGV_BNDERR*/, "failed address bounds checks", SignalCodePrintOption::Bounds);
AddSignalCode(11, 8 /*SEGV_MTEAERR*/, "async tag check fault");
AddSignalCode(11, 9 /*SEGV_MTESERR*/, "sync tag check fault", SignalCodePrintOption::Address);
// Some platforms will occasionally send nonstandard spurious SI_KERNEL
// codes. One way to get this is via unaligned SIMD loads. Treat it as invalid address.
AddSignalCode(11, 0x80 /*SI_KERNEL*/, "invalid address", SignalCodePrintOption::Address);
AddSignal(12, "SIGUSR2", false, true, true, "user defined signal 2");
AddSignal(13, "SIGPIPE", false, true, true, "write to pipe with reading end closed");
AddSignal(14, "SIGALRM", false, false, false, "alarm");
AddSignal(15, "SIGTERM", false, true, true, "termination requested");
AddSignal(16, "SIGSTKFLT", false, true, true, "stack fault");
AddSignal(17, "SIGCHLD", false, false, true, "child status has changed", "SIGCLD");
AddSignal(18, "SIGCONT", false, false, true, "process continue");
AddSignal(19, "SIGSTOP", true, true, true, "process stop");
AddSignal(20, "SIGTSTP", false, true, true, "tty stop");
AddSignal(21, "SIGTTIN", false, true, true, "background tty read");
AddSignal(22, "SIGTTOU", false, true, true, "background tty write");
AddSignal(23, "SIGURG", false, true, true, "urgent data on socket");
AddSignal(24, "SIGXCPU", false, true, true, "CPU resource exceeded");
AddSignal(25, "SIGXFSZ", false, true, true, "file size limit exceeded");
AddSignal(26, "SIGVTALRM", false, true, true, "virtual time alarm");
AddSignal(27, "SIGPROF", false, false, false, "profiling time alarm");
AddSignal(28, "SIGWINCH", false, true, true, "window size changes");
AddSignal(29, "SIGIO", false, true, true, "input/output ready/Pollable event", "SIGPOLL");
AddSignal(30, "SIGPWR", false, true, true, "power failure");
AddSignal(31, "SIGSYS", false, true, true, "invalid system call");
AddSignal(32, "SIG32", false, false, false, "threading library internal signal 1");
AddSignal(33, "SIG33", false, false, false, "threading library internal signal 2");
AddSignal(34, "SIGRTMIN", false, false, false, "real time signal 0");
AddSignal(35, "SIGRTMIN+1", false, false, false, "real time signal 1");
AddSignal(36, "SIGRTMIN+2", false, false, false, "real time signal 2");
AddSignal(37, "SIGRTMIN+3", false, false, false, "real time signal 3");
AddSignal(38, "SIGRTMIN+4", false, false, false, "real time signal 4");
AddSignal(39, "SIGRTMIN+5", false, false, false, "real time signal 5");
AddSignal(40, "SIGRTMIN+6", false, false, false, "real time signal 6");
AddSignal(41, "SIGRTMIN+7", false, false, false, "real time signal 7");
AddSignal(42, "SIGRTMIN+8", false, false, false, "real time signal 8");
AddSignal(43, "SIGRTMIN+9", false, false, false, "real time signal 9");
AddSignal(44, "SIGRTMIN+10", false, false, false, "real time signal 10");
AddSignal(45, "SIGRTMIN+11", false, false, false, "real time signal 11");
AddSignal(46, "SIGRTMIN+12", false, false, false, "real time signal 12");
AddSignal(47, "SIGRTMIN+13", false, false, false, "real time signal 13");
AddSignal(48, "SIGRTMIN+14", false, false, false, "real time signal 14");
AddSignal(49, "SIGRTMIN+15", false, false, false, "real time signal 15");
AddSignal(50, "SIGRTMAX-14", false, false, false, "real time signal 16"); // switching to SIGRTMAX-xxx to match "kill -l" output
AddSignal(51, "SIGRTMAX-13", false, false, false, "real time signal 17");
AddSignal(52, "SIGRTMAX-12", false, false, false, "real time signal 18");
AddSignal(53, "SIGRTMAX-11", false, false, false, "real time signal 19");
AddSignal(54, "SIGRTMAX-10", false, false, false, "real time signal 20");
AddSignal(55, "SIGRTMAX-9", false, false, false, "real time signal 21");
AddSignal(56, "SIGRTMAX-8", false, false, false, "real time signal 22");
AddSignal(57, "SIGRTMAX-7", false, false, false, "real time signal 23");
AddSignal(58, "SIGRTMAX-6", false, false, false, "real time signal 24");
AddSignal(59, "SIGRTMAX-5", false, false, false, "real time signal 25");
AddSignal(60, "SIGRTMAX-4", false, false, false, "real time signal 26");
AddSignal(61, "SIGRTMAX-3", false, false, false, "real time signal 27");
AddSignal(62, "SIGRTMAX-2", false, false, false, "real time signal 28");
AddSignal(63, "SIGRTMAX-1", false, false, false, "real time signal 29");
AddSignal(64, "SIGRTMAX", false, false, false, "real time signal 30");
// clang-format on
}
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