326 lines
11 KiB
C++
326 lines
11 KiB
C++
//===-- UnixSignals.cpp -----------------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// C Includes
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// C++ Includes
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// Other libraries and framework includes
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// Project includes
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#include "lldb/Target/UnixSignals.h"
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#include "Plugins/Process/Utility/FreeBSDSignals.h"
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#include "Plugins/Process/Utility/LinuxSignals.h"
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#include "Plugins/Process/Utility/MipsLinuxSignals.h"
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#include "Plugins/Process/Utility/NetBSDSignals.h"
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#include "lldb/Core/ArchSpec.h"
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#include "lldb/Host/StringConvert.h"
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using namespace lldb_private;
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UnixSignals::Signal::Signal(const char *name, bool default_suppress,
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bool default_stop, bool default_notify,
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const char *description, const char *alias)
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: m_name(name), m_alias(alias), m_description(),
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m_suppress(default_suppress), m_stop(default_stop),
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m_notify(default_notify) {
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if (description)
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m_description.assign(description);
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}
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lldb::UnixSignalsSP UnixSignals::Create(const ArchSpec &arch) {
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const auto &triple = arch.GetTriple();
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switch (triple.getOS()) {
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case llvm::Triple::Linux: {
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switch (triple.getArch()) {
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case llvm::Triple::mips:
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case llvm::Triple::mipsel:
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case llvm::Triple::mips64:
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case llvm::Triple::mips64el:
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return std::make_shared<MipsLinuxSignals>();
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default:
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return std::make_shared<LinuxSignals>();
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}
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}
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case llvm::Triple::FreeBSD:
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case llvm::Triple::OpenBSD:
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return std::make_shared<FreeBSDSignals>();
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case llvm::Triple::NetBSD:
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return std::make_shared<NetBSDSignals>();
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default:
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return std::make_shared<UnixSignals>();
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}
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}
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//----------------------------------------------------------------------
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// UnixSignals constructor
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//----------------------------------------------------------------------
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UnixSignals::UnixSignals() { Reset(); }
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UnixSignals::UnixSignals(const UnixSignals &rhs) : m_signals(rhs.m_signals) {}
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UnixSignals::~UnixSignals() = default;
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void UnixSignals::Reset() {
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// This builds one standard set of Unix Signals. If yours aren't quite in
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// this
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// order, you can either subclass this class, and use Add & Remove to change
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// them
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// or you can subclass and build them afresh in your constructor;
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//
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// Note: the signals below are the Darwin signals. Do not change these!
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m_signals.clear();
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// SIGNO NAME SUPPRESS STOP NOTIFY DESCRIPTION
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// ====== ============ ======== ====== ======
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// ===================================================
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AddSignal(1, "SIGHUP", false, true, true, "hangup");
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AddSignal(2, "SIGINT", true, true, true, "interrupt");
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AddSignal(3, "SIGQUIT", false, true, true, "quit");
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AddSignal(4, "SIGILL", false, true, true, "illegal instruction");
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AddSignal(5, "SIGTRAP", true, true, true,
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"trace trap (not reset when caught)");
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AddSignal(6, "SIGABRT", false, true, true, "abort()");
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AddSignal(7, "SIGEMT", false, true, true, "pollable event");
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AddSignal(8, "SIGFPE", false, true, true, "floating point exception");
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AddSignal(9, "SIGKILL", false, true, true, "kill");
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AddSignal(10, "SIGBUS", false, true, true, "bus error");
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AddSignal(11, "SIGSEGV", false, true, true, "segmentation violation");
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AddSignal(12, "SIGSYS", false, true, true, "bad argument to system call");
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AddSignal(13, "SIGPIPE", false, true, true,
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"write on a pipe with no one to read it");
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AddSignal(14, "SIGALRM", false, false, false, "alarm clock");
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AddSignal(15, "SIGTERM", false, true, true,
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"software termination signal from kill");
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AddSignal(16, "SIGURG", false, false, false,
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"urgent condition on IO channel");
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AddSignal(17, "SIGSTOP", true, true, true,
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"sendable stop signal not from tty");
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AddSignal(18, "SIGTSTP", false, true, true, "stop signal from tty");
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AddSignal(19, "SIGCONT", false, true, true, "continue a stopped process");
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AddSignal(20, "SIGCHLD", false, false, false,
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"to parent on child stop or exit");
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AddSignal(21, "SIGTTIN", false, true, true,
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"to readers process group upon background tty read");
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AddSignal(22, "SIGTTOU", false, true, true,
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"to readers process group upon background tty write");
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AddSignal(23, "SIGIO", false, false, false, "input/output possible signal");
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AddSignal(24, "SIGXCPU", false, true, true, "exceeded CPU time limit");
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AddSignal(25, "SIGXFSZ", false, true, true, "exceeded file size limit");
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AddSignal(26, "SIGVTALRM", false, false, false, "virtual time alarm");
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AddSignal(27, "SIGPROF", false, false, false, "profiling time alarm");
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AddSignal(28, "SIGWINCH", false, false, false, "window size changes");
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AddSignal(29, "SIGINFO", false, true, true, "information request");
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AddSignal(30, "SIGUSR1", false, true, true, "user defined signal 1");
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AddSignal(31, "SIGUSR2", false, true, true, "user defined signal 2");
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}
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void UnixSignals::AddSignal(int signo, const char *name, bool default_suppress,
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bool default_stop, bool default_notify,
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const char *description, const char *alias) {
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Signal new_signal(name, default_suppress, default_stop, default_notify,
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description, alias);
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m_signals.insert(std::make_pair(signo, new_signal));
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++m_version;
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}
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void UnixSignals::RemoveSignal(int signo) {
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collection::iterator pos = m_signals.find(signo);
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if (pos != m_signals.end())
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m_signals.erase(pos);
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++m_version;
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}
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const char *UnixSignals::GetSignalAsCString(int signo) const {
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collection::const_iterator pos = m_signals.find(signo);
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if (pos == m_signals.end())
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return nullptr;
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else
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return pos->second.m_name.GetCString();
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}
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bool UnixSignals::SignalIsValid(int32_t signo) const {
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return m_signals.find(signo) != m_signals.end();
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}
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ConstString UnixSignals::GetShortName(ConstString name) const {
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if (name) {
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const char *signame = name.AsCString();
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return ConstString(signame + 3); // Remove "SIG" from name
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}
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return name;
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}
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int32_t UnixSignals::GetSignalNumberFromName(const char *name) const {
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ConstString const_name(name);
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collection::const_iterator pos, end = m_signals.end();
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for (pos = m_signals.begin(); pos != end; pos++) {
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if ((const_name == pos->second.m_name) ||
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(const_name == pos->second.m_alias) ||
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(const_name == GetShortName(pos->second.m_name)) ||
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(const_name == GetShortName(pos->second.m_alias)))
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return pos->first;
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}
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const int32_t signo =
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StringConvert::ToSInt32(name, LLDB_INVALID_SIGNAL_NUMBER, 0);
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if (signo != LLDB_INVALID_SIGNAL_NUMBER)
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return signo;
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return LLDB_INVALID_SIGNAL_NUMBER;
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}
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int32_t UnixSignals::GetFirstSignalNumber() const {
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if (m_signals.empty())
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return LLDB_INVALID_SIGNAL_NUMBER;
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return (*m_signals.begin()).first;
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}
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int32_t UnixSignals::GetNextSignalNumber(int32_t current_signal) const {
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collection::const_iterator pos = m_signals.find(current_signal);
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collection::const_iterator end = m_signals.end();
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if (pos == end)
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return LLDB_INVALID_SIGNAL_NUMBER;
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else {
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pos++;
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if (pos == end)
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return LLDB_INVALID_SIGNAL_NUMBER;
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else
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return pos->first;
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}
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}
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const char *UnixSignals::GetSignalInfo(int32_t signo, bool &should_suppress,
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bool &should_stop,
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bool &should_notify) const {
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collection::const_iterator pos = m_signals.find(signo);
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if (pos == m_signals.end())
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return nullptr;
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else {
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const Signal &signal = pos->second;
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should_suppress = signal.m_suppress;
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should_stop = signal.m_stop;
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should_notify = signal.m_notify;
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return signal.m_name.AsCString("");
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}
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}
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bool UnixSignals::GetShouldSuppress(int signo) const {
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collection::const_iterator pos = m_signals.find(signo);
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if (pos != m_signals.end())
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return pos->second.m_suppress;
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return false;
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}
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bool UnixSignals::SetShouldSuppress(int signo, bool value) {
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collection::iterator pos = m_signals.find(signo);
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if (pos != m_signals.end()) {
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pos->second.m_suppress = value;
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++m_version;
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return true;
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}
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return false;
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}
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bool UnixSignals::SetShouldSuppress(const char *signal_name, bool value) {
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const int32_t signo = GetSignalNumberFromName(signal_name);
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if (signo != LLDB_INVALID_SIGNAL_NUMBER)
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return SetShouldSuppress(signo, value);
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return false;
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}
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bool UnixSignals::GetShouldStop(int signo) const {
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collection::const_iterator pos = m_signals.find(signo);
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if (pos != m_signals.end())
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return pos->second.m_stop;
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return false;
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}
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bool UnixSignals::SetShouldStop(int signo, bool value) {
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collection::iterator pos = m_signals.find(signo);
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if (pos != m_signals.end()) {
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pos->second.m_stop = value;
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++m_version;
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return true;
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}
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return false;
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}
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bool UnixSignals::SetShouldStop(const char *signal_name, bool value) {
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const int32_t signo = GetSignalNumberFromName(signal_name);
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if (signo != LLDB_INVALID_SIGNAL_NUMBER)
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return SetShouldStop(signo, value);
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return false;
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}
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bool UnixSignals::GetShouldNotify(int signo) const {
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collection::const_iterator pos = m_signals.find(signo);
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if (pos != m_signals.end())
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return pos->second.m_notify;
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return false;
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}
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bool UnixSignals::SetShouldNotify(int signo, bool value) {
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collection::iterator pos = m_signals.find(signo);
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if (pos != m_signals.end()) {
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pos->second.m_notify = value;
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++m_version;
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return true;
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}
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return false;
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}
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bool UnixSignals::SetShouldNotify(const char *signal_name, bool value) {
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const int32_t signo = GetSignalNumberFromName(signal_name);
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if (signo != LLDB_INVALID_SIGNAL_NUMBER)
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return SetShouldNotify(signo, value);
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return false;
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}
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int32_t UnixSignals::GetNumSignals() const { return m_signals.size(); }
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int32_t UnixSignals::GetSignalAtIndex(int32_t index) const {
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if (index < 0 || m_signals.size() <= static_cast<size_t>(index))
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return LLDB_INVALID_SIGNAL_NUMBER;
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auto it = m_signals.begin();
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std::advance(it, index);
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return it->first;
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}
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uint64_t UnixSignals::GetVersion() const { return m_version; }
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std::vector<int32_t>
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UnixSignals::GetFilteredSignals(llvm::Optional<bool> should_suppress,
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llvm::Optional<bool> should_stop,
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llvm::Optional<bool> should_notify) {
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std::vector<int32_t> result;
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for (int32_t signo = GetFirstSignalNumber();
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signo != LLDB_INVALID_SIGNAL_NUMBER;
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signo = GetNextSignalNumber(signo)) {
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bool signal_suppress = false;
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bool signal_stop = false;
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bool signal_notify = false;
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GetSignalInfo(signo, signal_suppress, signal_stop, signal_notify);
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// If any of filtering conditions are not met,
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// we move on to the next signal.
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if (should_suppress.hasValue() &&
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signal_suppress != should_suppress.getValue())
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continue;
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if (should_stop.hasValue() && signal_stop != should_stop.getValue())
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continue;
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if (should_notify.hasValue() && signal_notify != should_notify.getValue())
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continue;
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result.push_back(signo);
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}
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return result;
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}
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