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/* Inferior process information for the remote server for GDB.
Copyright (C) 2002-2022 Free Software Foundation, Inc.
Contributed by MontaVista Software.
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/>. */
#include "server.h"
#include "gdbsupport/common-inferior.h"
#include "gdbthread.h"
#include "dll.h"
std::list<process_info *> all_processes;
std::list<thread_info *> all_threads;
/* The current process. */
static process_info *current_process_;
/* The current thread. This is either a thread of CURRENT_PROCESS, or
NULL. */
struct thread_info *current_thread;
/* The current working directory used to start the inferior.
Empty if not specified. */
static std::string current_inferior_cwd;
struct thread_info *
add_thread (ptid_t thread_id, void *target_data)
{
thread_info *new_thread = new thread_info (thread_id, target_data);
all_threads.push_back (new_thread);
if (current_thread == NULL)
switch_to_thread (new_thread);
return new_thread;
}
/* See gdbthread.h. */
struct thread_info *
get_first_thread (void)
{
if (!all_threads.empty ())
return all_threads.front ();
else
return NULL;
}
struct thread_info *
find_thread_ptid (ptid_t ptid)
{
return find_thread ([&] (thread_info *thread) {
return thread->id == ptid;
});
}
/* Find a thread associated with the given PROCESS, or NULL if no
such thread exists. */
static struct thread_info *
find_thread_process (const struct process_info *const process)
{
return find_any_thread_of_pid (process->pid);
}
/* See gdbthread.h. */
struct thread_info *
find_any_thread_of_pid (int pid)
{
return find_thread (pid, [] (thread_info *thread) {
return true;
});
}
static void
free_one_thread (thread_info *thread)
{
delete thread;
}
void
remove_thread (struct thread_info *thread)
{
if (thread->btrace != NULL)
target_disable_btrace (thread->btrace);
discard_queued_stop_replies (ptid_of (thread));
all_threads.remove (thread);
if (current_thread == thread)
switch_to_thread (nullptr);
free_one_thread (thread);
}
void *
thread_target_data (struct thread_info *thread)
{
return thread->target_data;
}
struct regcache *
thread_regcache_data (struct thread_info *thread)
{
return thread->regcache_data;
}
void
set_thread_regcache_data (struct thread_info *thread, struct regcache *data)
{
thread->regcache_data = data;
}
void
clear_inferiors (void)
{
for_each_thread (free_one_thread);
all_threads.clear ();
clear_dlls ();
switch_to_thread (nullptr);
current_process_ = nullptr;
}
struct process_info *
add_process (int pid, int attached)
{
process_info *process = new process_info (pid, attached);
all_processes.push_back (process);
return process;
}
/* Remove a process from the common process list and free the memory
allocated for it.
The caller is responsible for freeing private data first. */
void
remove_process (struct process_info *process)
{
clear_symbol_cache (&process->symbol_cache);
free_all_breakpoints (process);
gdb_assert (find_thread_process (process) == NULL);
all_processes.remove (process);
if (current_process () == process)
switch_to_process (nullptr);
delete process;
}
process_info *
find_process_pid (int pid)
{
return find_process ([&] (process_info *process) {
return process->pid == pid;
});
}
/* Get the first process in the process list, or NULL if the list is empty. */
process_info *
get_first_process (void)
{
if (!all_processes.empty ())
return all_processes.front ();
else
return NULL;
}
/* Return non-zero if there are any inferiors that we have created
(as opposed to attached-to). */
int
have_started_inferiors_p (void)
{
return find_process ([] (process_info *process) {
return !process->attached;
}) != NULL;
}
/* Return non-zero if there are any inferiors that we have attached to. */
int
have_attached_inferiors_p (void)
{
return find_process ([] (process_info *process) {
return process->attached;
}) != NULL;
}
struct process_info *
get_thread_process (const struct thread_info *thread)
{
return find_process_pid (thread->id.pid ());
}
struct process_info *
current_process (void)
{
return current_process_;
}
/* See gdbsupport/common-gdbthread.h. */
void
switch_to_thread (process_stratum_target *ops, ptid_t ptid)
{
gdb_assert (ptid != minus_one_ptid);
switch_to_thread (find_thread_ptid (ptid));
}
/* See gdbthread.h. */
void
switch_to_thread (thread_info *thread)
{
if (thread != nullptr)
current_process_ = get_thread_process (thread);
else
current_process_ = nullptr;
current_thread = thread;
}
/* See inferiors.h. */
void
switch_to_process (process_info *proc)
{
current_process_ = proc;
current_thread = nullptr;
}
/* See gdbsupport/common-inferior.h. */
const std::string &
get_inferior_cwd ()
{
return current_inferior_cwd;
}
/* See inferiors.h. */
void
set_inferior_cwd (std::string cwd)
{
current_inferior_cwd = std::move (cwd);
}
scoped_restore_current_thread::scoped_restore_current_thread ()
{
m_process = current_process_;
m_thread = current_thread;
}
scoped_restore_current_thread::~scoped_restore_current_thread ()
{
if (m_dont_restore)
return;
if (m_thread != nullptr)
switch_to_thread (m_thread);
else
switch_to_process (m_process);
}