mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-09 04:21:49 +08:00
3666a04883
This commits the result of running gdb/copyright.py as per our Start of New Year procedure... gdb/ChangeLog Update copyright year range in copyright header of all GDB files.
172 lines
4.8 KiB
C++
172 lines
4.8 KiB
C++
/* The ptid_t type and common functions operating on it.
|
|
|
|
Copyright (C) 1986-2021 Free Software Foundation, Inc.
|
|
|
|
This file is part of GDB.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>. */
|
|
|
|
#ifndef COMMON_PTID_H
|
|
#define COMMON_PTID_H
|
|
|
|
/* The ptid struct is a collection of the various "ids" necessary for
|
|
identifying the inferior process/thread being debugged. This
|
|
consists of the process id (pid), lightweight process id (lwp) and
|
|
thread id (tid). When manipulating ptids, the constructors,
|
|
accessors, and predicates declared in this file should be used. Do
|
|
NOT access the struct ptid members directly.
|
|
|
|
process_stratum targets that handle threading themselves should
|
|
prefer using the ptid.lwp field, leaving the ptid.tid field for any
|
|
thread_stratum target that might want to sit on top.
|
|
*/
|
|
|
|
#include <functional>
|
|
|
|
class ptid_t
|
|
{
|
|
public:
|
|
/* Must have a trivial defaulted default constructor so that the
|
|
type remains POD. */
|
|
ptid_t () noexcept = default;
|
|
|
|
/* Make a ptid given the necessary PID, LWP, and TID components.
|
|
|
|
A ptid with only a PID (LWP and TID equal to zero) is usually used to
|
|
represent a whole process, including all its lwps/threads. */
|
|
|
|
explicit constexpr ptid_t (int pid, long lwp = 0, long tid = 0)
|
|
: m_pid (pid), m_lwp (lwp), m_tid (tid)
|
|
{}
|
|
|
|
/* Fetch the pid (process id) component from the ptid. */
|
|
|
|
constexpr int pid () const
|
|
{ return m_pid; }
|
|
|
|
/* Return true if the ptid's lwp member is non-zero. */
|
|
|
|
constexpr bool lwp_p () const
|
|
{ return m_lwp != 0; }
|
|
|
|
/* Fetch the lwp (lightweight process) component from the ptid. */
|
|
|
|
constexpr long lwp () const
|
|
{ return m_lwp; }
|
|
|
|
/* Return true if the ptid's tid member is non-zero. */
|
|
|
|
constexpr bool tid_p () const
|
|
{ return m_tid != 0; }
|
|
|
|
/* Fetch the tid (thread id) component from a ptid. */
|
|
|
|
constexpr long tid () const
|
|
{ return m_tid; }
|
|
|
|
/* Return true if the ptid represents a whole process, including all its
|
|
lwps/threads. Such ptids have the form of (pid, 0, 0), with
|
|
pid != -1. */
|
|
|
|
constexpr bool is_pid () const
|
|
{
|
|
return (*this != make_null ()
|
|
&& *this != make_minus_one ()
|
|
&& m_lwp == 0
|
|
&& m_tid == 0);
|
|
}
|
|
|
|
/* Compare two ptids to see if they are equal. */
|
|
|
|
constexpr bool operator== (const ptid_t &other) const
|
|
{
|
|
return (m_pid == other.m_pid
|
|
&& m_lwp == other.m_lwp
|
|
&& m_tid == other.m_tid);
|
|
}
|
|
|
|
/* Compare two ptids to see if they are different. */
|
|
|
|
constexpr bool operator!= (const ptid_t &other) const
|
|
{
|
|
return !(*this == other);
|
|
}
|
|
|
|
/* Return true if the ptid matches FILTER. FILTER can be the wild
|
|
card MINUS_ONE_PTID (all ptids match it); can be a ptid representing
|
|
a process (ptid.is_pid () returns true), in which case, all lwps and
|
|
threads of that given process match, lwps and threads of other
|
|
processes do not; or, it can represent a specific thread, in which
|
|
case, only that thread will match true. The ptid must represent a
|
|
specific LWP or THREAD, it can never be a wild card. */
|
|
|
|
constexpr bool matches (const ptid_t &filter) const
|
|
{
|
|
return (/* If filter represents any ptid, it's always a match. */
|
|
filter == make_minus_one ()
|
|
/* If filter is only a pid, any ptid with that pid
|
|
matches. */
|
|
|| (filter.is_pid () && m_pid == filter.pid ())
|
|
|
|
/* Otherwise, this ptid only matches if it's exactly equal
|
|
to filter. */
|
|
|| *this == filter);
|
|
}
|
|
|
|
/* Make a null ptid. */
|
|
|
|
static constexpr ptid_t make_null ()
|
|
{ return ptid_t (0, 0, 0); }
|
|
|
|
/* Make a minus one ptid. */
|
|
|
|
static constexpr ptid_t make_minus_one ()
|
|
{ return ptid_t (-1, 0, 0); }
|
|
|
|
private:
|
|
/* Process id. */
|
|
int m_pid;
|
|
|
|
/* Lightweight process id. */
|
|
long m_lwp;
|
|
|
|
/* Thread id. */
|
|
long m_tid;
|
|
};
|
|
|
|
/* Functor to hash a ptid. */
|
|
|
|
struct hash_ptid
|
|
{
|
|
size_t operator() (const ptid_t &ptid) const
|
|
{
|
|
std::hash<long> long_hash;
|
|
|
|
return (long_hash (ptid.pid ())
|
|
+ long_hash (ptid.lwp ())
|
|
+ long_hash (ptid.tid ()));
|
|
}
|
|
};
|
|
|
|
/* The null or zero ptid, often used to indicate no process. */
|
|
|
|
extern const ptid_t null_ptid;
|
|
|
|
/* The (-1,0,0) ptid, often used to indicate either an error condition
|
|
or a "don't care" condition, i.e, "run all threads." */
|
|
|
|
extern const ptid_t minus_one_ptid;
|
|
|
|
#endif /* COMMON_PTID_H */
|