llvm-project/lldb/source/Target/UnixSignals.cpp

311 lines
9.5 KiB
C++

//===-- UnixSignals.cpp -----------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "lldb/Target/UnixSignals.h"
// C Includes
// C++ Includes
// Other libraries and framework includes
// Project includes
using namespace lldb_private;
UnixSignals::Signal::Signal (const char *name, bool default_suppress, bool default_stop, bool default_notify) :
m_name (name),
m_conditions ()
{
m_conditions[Signal::eCondSuppress] = default_suppress;
m_conditions[Signal::eCondStop] = default_stop;
m_conditions[Signal::eCondNotify] = default_notify;
}
//----------------------------------------------------------------------
// UnixSignals constructor
//----------------------------------------------------------------------
UnixSignals::UnixSignals ()
{
Reset ();
}
//----------------------------------------------------------------------
// Destructor
//----------------------------------------------------------------------
UnixSignals::~UnixSignals ()
{
}
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;
m_signals.clear();
AddSignal(1, "SIGHUP", false, true, true ); // 1 hangup
AddSignal(2, "SIGINT", true, true, true ); // 2 interrupt
AddSignal(3, "SIGQUIT", false, true, true ); // 3 quit
AddSignal(4, "SIGILL", false, true, true ); // 4 illegal instruction (not reset when caught)
AddSignal(5, "SIGTRAP", true, true, true ); // 5 trace trap (not reset when caught)
AddSignal(6, "SIGABRT", false, true, true ); // 6 abort()
AddSignal(7, "SIGEMT", false, true, true ); // 7 pollable event ([XSR] generated, not supported)
AddSignal(8, "SIGFPE", false, true, true ); // 8 floating point exception
AddSignal(9, "SIGKILL", false, true, true ); // 9 kill (cannot be caught or ignored)
AddSignal(10, "SIGBUS", false, true, true ); // 10 bus error
AddSignal(11, "SIGSEGV", false, true, true ); // 11 segmentation violation
AddSignal(12, "SIGSYS", false, true, true ); // 12 bad argument to system call
AddSignal(13, "SIGPIPE", false, true, true ); // 13 write on a pipe with no one to read it
AddSignal(14, "SIGALRM", false, false, true ); // 14 alarm clock
AddSignal(15, "SIGTERM", false, true, true ); // 15 software termination signal from kill
AddSignal(16, "SIGURG", false, false, false); // 16 urgent condition on IO channel
AddSignal(17, "SIGSTOP", false, true, true ); // 17 sendable stop signal not from tty
AddSignal(18, "SIGTSTP", false, true, true ); // 18 stop signal from tty
AddSignal(19, "SIGCONT", false, true, true ); // 19 continue a stopped process
AddSignal(20, "SIGCHLD", false, false, true ); // 20 to parent on child stop or exit
AddSignal(21, "SIGTTIN", false, true, true ); // 21 to readers pgrp upon background tty read
AddSignal(22, "SIGTTOU", false, true, true ); // 22 like TTIN for output if (tp->t_local&LTOSTOP)
AddSignal(23, "SIGIO", false, false, false); // 23 input/output possible signal
AddSignal(24, "SIGXCPU", false, true, true ); // 24 exceeded CPU time limit
AddSignal(25, "SIGXFSZ", false, true, true ); // 25 exceeded file size limit
AddSignal(26, "SIGVTALRM", false, false, false); // 26 virtual time alarm
AddSignal(27, "SIGPROF", false, false, false); // 27 profiling time alarm
AddSignal(28, "SIGWINCH", false, false, false); // 28 window size changes
AddSignal(29, "SIGINFO", false, true, true ); // 29 information request
AddSignal(30, "SIGUSR1", false, true, true ); // 30 user defined signal 1
AddSignal(31, "SIGUSR2", false, true, true ); // 31 user defined signal 2
}
void
UnixSignals::AddSignal (int signo, const char *name, bool default_suppress, bool default_stop, bool default_notify)
{
collection::iterator iter = m_signals.find (signo);
struct Signal new_signal (name, default_suppress, default_stop, default_notify);
if (iter != m_signals.end())
m_signals.erase (iter);
m_signals.insert (iter, collection::value_type (signo, new_signal));
}
void
UnixSignals::RemoveSignal (int signo)
{
collection::iterator pos = m_signals.find (signo);
if (pos != m_signals.end())
m_signals.erase (pos);
}
UnixSignals::Signal *
UnixSignals::GetSignalByName (const char *name, int32_t &signo)
{
ConstString const_name (name);
collection::iterator pos, end = m_signals.end ();
for (pos = m_signals.begin (); pos != end; pos++)
{
if (const_name == (*pos).second.m_name)
{
signo = (*pos).first;
return &((*pos).second);
}
}
return NULL;
}
const UnixSignals::Signal *
UnixSignals::GetSignalByName (const char *name, int32_t &signo) 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)
{
signo = (*pos).first;
return &((*pos).second);
}
}
return NULL;
}
const char *
UnixSignals::GetSignalAsCString (int signo) const
{
collection::const_iterator pos = m_signals.find (signo);
if (pos == m_signals.end())
return NULL;
else
return (*pos).second.m_name.GetCString ();
}
bool
UnixSignals::SignalIsValid (int32_t signo) const
{
return m_signals.find (signo) != m_signals.end();
}
int32_t
UnixSignals::GetSignalNumberFromName (const char *name) const
{
int32_t signo;
const Signal *signal = GetSignalByName (name, signo);
if (signal == NULL)
return LLDB_INVALID_SIGNAL_NUMBER;
else
return signo;
}
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 NULL;
else
{
const Signal &signal = (*pos).second;
should_suppress = signal.m_conditions[Signal::eCondSuppress];
should_stop = signal.m_conditions[Signal::eCondStop];
should_notify = signal.m_conditions[Signal::eCondNotify];
return signal.m_name.AsCString("");
}
}
bool
UnixSignals::GetCondition
(
int32_t signo,
UnixSignals::Signal::Condition cond_pos
) const
{
collection::const_iterator pos = m_signals.find (signo);
if (pos == m_signals.end())
return false;
else
return (*pos).second.m_conditions[cond_pos];
}
bool
UnixSignals::SetCondition (int32_t signo, UnixSignals::Signal::Condition cond_pos, bool value)
{
collection::iterator pos = m_signals.find (signo);
if (pos == m_signals.end())
return false;
else
{
bool ret_value = (*pos).second.m_conditions[cond_pos];
(*pos).second.m_conditions[cond_pos] = value;
return ret_value;
}
}
bool
UnixSignals::SetCondition (const char *signal_name, UnixSignals::Signal::Condition cond_pos, bool value)
{
int32_t signo;
Signal *signal = GetSignalByName (signal_name, signo);
if (signal == NULL)
return false;
else
{
bool ret_value = signal->m_conditions[cond_pos];
signal->m_conditions[cond_pos] = value;
return ret_value;
}
}
bool
UnixSignals::GetShouldSuppress (int signo) const
{
return GetCondition (signo, Signal::eCondSuppress);
}
bool
UnixSignals::SetShouldSuppress (int signo, bool value)
{
return SetCondition (signo, Signal::eCondSuppress, value);
}
bool
UnixSignals::SetShouldSuppress (const char *signal_name, bool value)
{
return SetCondition (signal_name, Signal::eCondSuppress, value);
}
bool
UnixSignals::GetShouldStop (int signo) const
{
return GetCondition (signo, Signal::eCondStop);
}
bool
UnixSignals::SetShouldStop (int signo, bool value)
{
return SetCondition (signo, Signal::eCondStop, value);
}
bool
UnixSignals::SetShouldStop (const char *signal_name, bool value)
{
return SetCondition (signal_name, Signal::eCondStop, value);
}
bool
UnixSignals::GetShouldNotify (int signo) const
{
return GetCondition (signo, Signal::eCondNotify);
}
bool
UnixSignals::SetShouldNotify (int signo, bool value)
{
return SetCondition (signo, Signal::eCondNotify, value);
}
bool
UnixSignals::SetShouldNotify (const char *signal_name, bool value)
{
return SetCondition (signal_name, Signal::eCondNotify, value);
}