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| //===-- UnixSignals.cpp -----------------------------------------*- C++ -*-===//
//
// 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 "lldb/Target/UnixSignals.h"
#include "Plugins/Process/Utility/FreeBSDSignals.h"
#include "Plugins/Process/Utility/LinuxSignals.h"
#include "Plugins/Process/Utility/MipsLinuxSignals.h"
#include "Plugins/Process/Utility/NetBSDSignals.h"
#include "lldb/Host/HostInfo.h"
#include "lldb/Host/StringConvert.h"
#include "lldb/Utility/ArchSpec.h"
using namespace lldb_private;
UnixSignals::Signal::Signal(const char *name, bool default_suppress,
bool default_stop, bool default_notify,
const char *description, const char *alias)
: m_name(name), m_alias(alias), m_description(),
m_suppress(default_suppress), m_stop(default_stop),
m_notify(default_notify) {
if (description)
m_description.assign(description);
}
lldb::UnixSignalsSP UnixSignals::Create(const ArchSpec &arch) {
const auto &triple = arch.GetTriple();
switch (triple.getOS()) {
case llvm::Triple::Linux: {
switch (triple.getArch()) {
case llvm::Triple::mips:
case llvm::Triple::mipsel:
case llvm::Triple::mips64:
case llvm::Triple::mips64el:
return std::make_shared<MipsLinuxSignals>();
default:
return std::make_shared<LinuxSignals>();
}
}
case llvm::Triple::FreeBSD:
case llvm::Triple::OpenBSD:
return std::make_shared<FreeBSDSignals>();
case llvm::Triple::NetBSD:
return std::make_shared<NetBSDSignals>();
default:
return std::make_shared<UnixSignals>();
}
}
lldb::UnixSignalsSP UnixSignals::CreateForHost() {
static lldb::UnixSignalsSP s_unix_signals_sp =
Create(HostInfo::GetArchitecture());
return s_unix_signals_sp;
}
// UnixSignals constructor
UnixSignals::UnixSignals() { Reset(); }
UnixSignals::UnixSignals(const UnixSignals &rhs) : m_signals(rhs.m_signals) {}
UnixSignals::~UnixSignals() = default;
void UnixSignals::Reset() {
// This builds one standard set of Unix Signals. If yours aren't quite in
// this order, you can either subclass this class, and use Add & Remove to
// change them
// or you can subclass and build them afresh in your constructor;
//
// Note: the signals below are the Darwin signals. Do not change these!
m_signals.clear();
// 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");
AddSignal(5, "SIGTRAP", true, true, true,
"trace trap (not reset when caught)");
AddSignal(6, "SIGABRT", false, true, true, "abort()");
AddSignal(7, "SIGEMT", false, true, true, "pollable event");
AddSignal(8, "SIGFPE", false, true, true, "floating point exception");
AddSignal(9, "SIGKILL", false, true, true, "kill");
AddSignal(10, "SIGBUS", false, true, true, "bus error");
AddSignal(11, "SIGSEGV", false, true, true, "segmentation violation");
AddSignal(12, "SIGSYS", false, true, true, "bad argument to system call");
AddSignal(13, "SIGPIPE", false, false, false,
"write on a pipe with no one to read it");
AddSignal(14, "SIGALRM", false, false, false, "alarm clock");
AddSignal(15, "SIGTERM", false, true, true,
"software termination signal from kill");
AddSignal(16, "SIGURG", false, false, false,
"urgent condition on IO channel");
AddSignal(17, "SIGSTOP", true, true, true,
"sendable stop signal not from tty");
AddSignal(18, "SIGTSTP", false, true, true, "stop signal from tty");
AddSignal(19, "SIGCONT", false, true, true, "continue a stopped process");
AddSignal(20, "SIGCHLD", false, false, false,
"to parent on child stop or exit");
AddSignal(21, "SIGTTIN", false, true, true,
"to readers process group upon background tty read");
AddSignal(22, "SIGTTOU", false, true, true,
"to readers process group upon background tty write");
AddSignal(23, "SIGIO", false, false, false, "input/output possible signal");
AddSignal(24, "SIGXCPU", false, true, true, "exceeded CPU time limit");
AddSignal(25, "SIGXFSZ", false, true, true, "exceeded file size limit");
AddSignal(26, "SIGVTALRM", false, false, false, "virtual time alarm");
AddSignal(27, "SIGPROF", false, false, false, "profiling time alarm");
AddSignal(28, "SIGWINCH", false, false, false, "window size changes");
AddSignal(29, "SIGINFO", false, true, true, "information request");
AddSignal(30, "SIGUSR1", false, true, true, "user defined signal 1");
AddSignal(31, "SIGUSR2", false, true, true, "user defined signal 2");
}
void UnixSignals::AddSignal(int signo, const char *name, bool default_suppress,
bool default_stop, bool default_notify,
const char *description, const char *alias) {
Signal new_signal(name, default_suppress, default_stop, default_notify,
description, alias);
m_signals.insert(std::make_pair(signo, new_signal));
++m_version;
}
void UnixSignals::RemoveSignal(int signo) {
collection::iterator pos = m_signals.find(signo);
if (pos != m_signals.end())
m_signals.erase(pos);
++m_version;
}
const char *UnixSignals::GetSignalAsCString(int signo) const {
collection::const_iterator pos = m_signals.find(signo);
if (pos == m_signals.end())
return nullptr;
else
return pos->second.m_name.GetCString();
}
bool UnixSignals::SignalIsValid(int32_t signo) const {
return m_signals.find(signo) != m_signals.end();
}
ConstString UnixSignals::GetShortName(ConstString name) const {
if (name) {
const char *signame = name.AsCString();
return ConstString(signame + 3); // Remove "SIG" from name
}
return name;
}
int32_t UnixSignals::GetSignalNumberFromName(const char *name) const {
ConstString const_name(name);
collection::const_iterator pos, end = m_signals.end();
for (pos = m_signals.begin(); pos != end; pos++) {
if ((const_name == pos->second.m_name) ||
(const_name == pos->second.m_alias) ||
(const_name == GetShortName(pos->second.m_name)) ||
(const_name == GetShortName(pos->second.m_alias)))
return pos->first;
}
const int32_t signo =
StringConvert::ToSInt32(name, LLDB_INVALID_SIGNAL_NUMBER, 0);
if (signo != LLDB_INVALID_SIGNAL_NUMBER)
return signo;
return LLDB_INVALID_SIGNAL_NUMBER;
}
int32_t UnixSignals::GetFirstSignalNumber() const {
if (m_signals.empty())
return LLDB_INVALID_SIGNAL_NUMBER;
return (*m_signals.begin()).first;
}
int32_t UnixSignals::GetNextSignalNumber(int32_t current_signal) const {
collection::const_iterator pos = m_signals.find(current_signal);
collection::const_iterator end = m_signals.end();
if (pos == end)
return LLDB_INVALID_SIGNAL_NUMBER;
else {
pos++;
if (pos == end)
return LLDB_INVALID_SIGNAL_NUMBER;
else
return pos->first;
}
}
const char *UnixSignals::GetSignalInfo(int32_t signo, bool &should_suppress,
bool &should_stop,
bool &should_notify) const {
collection::const_iterator pos = m_signals.find(signo);
if (pos == m_signals.end())
return nullptr;
else {
const Signal &signal = pos->second;
should_suppress = signal.m_suppress;
should_stop = signal.m_stop;
should_notify = signal.m_notify;
return signal.m_name.AsCString("");
}
}
bool UnixSignals::GetShouldSuppress(int signo) const {
collection::const_iterator pos = m_signals.find(signo);
if (pos != m_signals.end())
return pos->second.m_suppress;
return false;
}
bool UnixSignals::SetShouldSuppress(int signo, bool value) {
collection::iterator pos = m_signals.find(signo);
if (pos != m_signals.end()) {
pos->second.m_suppress = value;
++m_version;
return true;
}
return false;
}
bool UnixSignals::SetShouldSuppress(const char *signal_name, bool value) {
const int32_t signo = GetSignalNumberFromName(signal_name);
if (signo != LLDB_INVALID_SIGNAL_NUMBER)
return SetShouldSuppress(signo, value);
return false;
}
bool UnixSignals::GetShouldStop(int signo) const {
collection::const_iterator pos = m_signals.find(signo);
if (pos != m_signals.end())
return pos->second.m_stop;
return false;
}
bool UnixSignals::SetShouldStop(int signo, bool value) {
collection::iterator pos = m_signals.find(signo);
if (pos != m_signals.end()) {
pos->second.m_stop = value;
++m_version;
return true;
}
return false;
}
bool UnixSignals::SetShouldStop(const char *signal_name, bool value) {
const int32_t signo = GetSignalNumberFromName(signal_name);
if (signo != LLDB_INVALID_SIGNAL_NUMBER)
return SetShouldStop(signo, value);
return false;
}
bool UnixSignals::GetShouldNotify(int signo) const {
collection::const_iterator pos = m_signals.find(signo);
if (pos != m_signals.end())
return pos->second.m_notify;
return false;
}
bool UnixSignals::SetShouldNotify(int signo, bool value) {
collection::iterator pos = m_signals.find(signo);
if (pos != m_signals.end()) {
pos->second.m_notify = value;
++m_version;
return true;
}
return false;
}
bool UnixSignals::SetShouldNotify(const char *signal_name, bool value) {
const int32_t signo = GetSignalNumberFromName(signal_name);
if (signo != LLDB_INVALID_SIGNAL_NUMBER)
return SetShouldNotify(signo, value);
return false;
}
int32_t UnixSignals::GetNumSignals() const { return m_signals.size(); }
int32_t UnixSignals::GetSignalAtIndex(int32_t index) const {
if (index < 0 || m_signals.size() <= static_cast<size_t>(index))
return LLDB_INVALID_SIGNAL_NUMBER;
auto it = m_signals.begin();
std::advance(it, index);
return it->first;
}
uint64_t UnixSignals::GetVersion() const { return m_version; }
std::vector<int32_t>
UnixSignals::GetFilteredSignals(llvm::Optional<bool> should_suppress,
llvm::Optional<bool> should_stop,
llvm::Optional<bool> should_notify) {
std::vector<int32_t> result;
for (int32_t signo = GetFirstSignalNumber();
signo != LLDB_INVALID_SIGNAL_NUMBER;
signo = GetNextSignalNumber(signo)) {
bool signal_suppress = false;
bool signal_stop = false;
bool signal_notify = false;
GetSignalInfo(signo, signal_suppress, signal_stop, signal_notify);
// If any of filtering conditions are not met, we move on to the next
// signal.
if (should_suppress.hasValue() &&
signal_suppress != should_suppress.getValue())
continue;
if (should_stop.hasValue() && signal_stop != should_stop.getValue())
continue;
if (should_notify.hasValue() && signal_notify != should_notify.getValue())
continue;
result.push_back(signo);
}
return result;
}
|