Nigel
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
llvm-project/lldb/source/Target/UnixSignals.cpp

345 lines
11 KiB
C++
Raw Blame History

//===-- UnixSignals.cpp -----------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// C Includes
// C++ Includes
// Other libraries and framework includes
// Project includes
#include "lldb/Target/UnixSignals.h"
#include "lldb/Core/ArchSpec.h"
#include "lldb/Host/StringConvert.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"
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>();
}
}
//----------------------------------------------------------------------
// 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;
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, true , true , "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));
}
void
UnixSignals::RemoveSignal (int signo)
{
collection::iterator pos = m_signals.find (signo);
if (pos != m_signals.end())
m_signals.erase (pos);
}
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;
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;
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;
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;
}
Reference in New Issue View Git Blame Copy Permalink