mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-03 04:12:10 +08:00
e8032dde10
When GDB wants to sync the thread list with the target's (e.g., due to "info threads"), it calls update_thread_list: update_thread_list (void) { prune_threads (); target_find_new_threads (); update_threads_executing (); } And then prune_threads does: prune_threads (void) { struct thread_info *tp, *next; for (tp = thread_list; tp; tp = next) { next = tp->next; if (!thread_alive (tp)) delete_thread (tp->ptid); } } Calling thread_live on each thread one by one is expensive. E.g., on Linux, it ends up doing kill(SIG0) once for each thread. Not a big deal, but still a bunch of syscalls... With the remote target, it's cumbersome. That thread_alive call ends up generating one T packet per thread: Sending packet: $Tp2141.2150#82...Packet received: OK Sending packet: $Tp2141.214f#b7...Packet received: OK Sending packet: $Tp2141.2141#82...Packet received: OK Sending packet: $qXfer:threads:read::0,fff#03...Packet received: l<threads>\n<thread id="p2141.2141" core="2"/>\n<thread id="p2141.214f" core="1"/>\n<thread id="p2141.2150" core="2"/>\n</threads>\n That seems a bit silly when target_find_new_threads method implementations will always fetch the whole current set of target threads, and then add those that are not in GDB's thread list, to GDB's thread list. This patch thus pushes down the responsibility of pruning dead threads to the target_find_new_threads method instead, so a target may implement pruning dead threads however it wants. Once we do that, target_find_new_threads becomes a misnomer, so the patch renames it to target_update_thread_list. The patch doesn't attempt to do any optimization to any target yet. It simply exports prune_threads, and makes all implementations of target_update_thread_list call that. It's meant to be a no-op. gdb/ 2014-10-15 Pedro Alves <palves@redhat.com> * ada-tasks.c (print_ada_task_info, task_command_1): Adjust. * bsd-uthread.c (bsd_uthread_find_new_threads): Rename to ... (bsd_uthread_update_thread_list): ... this. Call prune_threads. (bsd_uthread_target): Adjust. * corelow.c (core_open): Adjust. * dec-thread.c (dec_thread_find_new_threads): Update comment. (dec_thread_update_thread_list): New function. (init_dec_thread_ops): Adjust. * gdbthread.h (prune_threads): New declaration. * linux-thread-db.c (thread_db_find_new_threads): Rename to ... (thread_db_update_thread_list): ... this. Call prune_threads. (init_thread_db_ops): Adjust. * nto-procfs.c (procfs_find_new_threads): Rename to ... (procfs_update_thread_list): ... this. Call prune_threads. (procfs_attach, procfs_create_inferior, init_procfs_targets): Adjust. * obsd-nat.c (obsd_find_new_threads): Rename to ... (obsd_update_thread_list): ... this. Call prune_threads. (obsd_add_target): Adjust. * procfs.c (procfs_target): Adjust. (procfs_notice_thread): Update comment. (procfs_find_new_threads): Rename to ... (procfs_update_thread_list): ... this. Call prune_threads. * ravenscar-thread.c (ravenscar_update_inferior_ptid): Update comment. (ravenscar_wait): Adjust. (ravenscar_find_new_threads): Rename to ... (ravenscar_update_thread_list): ... this. Call prune_threads. (init_ravenscar_thread_ops): Adjust. * record-btrace.c (record_btrace_find_new_threads): Rename to ... (record_btrace_update_thread_list): ... this. Adjust comment. (init_record_btrace_ops): Adjust. * remote.c (remote_threads_info): Rename to ... (remote_update_thread_list): ... this. Call prune_threads. (remote_start_remote, extended_remote_attach_1, init_remote_ops): Adjust. * sol-thread.c (check_for_thread_db): Adjust. (sol_find_new_threads_callback): Rename to ... (sol_update_thread_list_callback): ... this. (sol_find_new_threads): Rename to ... (sol_update_thread_list): ... this. Call prune_threads. Adjust. (sol_get_ada_task_ptid, init_sol_thread_ops): Adjust. * target-delegates.c: Regenerate. * target.c (target_find_new_threads): Rename to ... (target_update_thread_list): ... this. * target.h (struct target_ops): Rename to_find_new_threads field to to_update_thread_list. (target_find_new_threads): Rename to ... (target_update_thread_list): ... this. * thread.c (prune_threads): Make extern. (update_thread_list): Adjust.
1554 lines
39 KiB
C
1554 lines
39 KiB
C
/* Machine independent support for QNX Neutrino /proc (process file system)
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for GDB. Written by Colin Burgess at QNX Software Systems Limited.
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Copyright (C) 2003-2014 Free Software Foundation, Inc.
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Contributed by QNX Software Systems Ltd.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include <fcntl.h>
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#include <spawn.h>
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#include <sys/debug.h>
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#include <sys/procfs.h>
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#include <sys/neutrino.h>
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#include <sys/syspage.h>
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#include <dirent.h>
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#include <sys/netmgr.h>
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#include "gdbcore.h"
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#include "inferior.h"
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#include "target.h"
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#include "objfiles.h"
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#include "gdbthread.h"
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#include "nto-tdep.h"
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#include "command.h"
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#include "regcache.h"
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#include "solib.h"
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#include "inf-child.h"
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#define NULL_PID 0
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#define _DEBUG_FLAG_TRACE (_DEBUG_FLAG_TRACE_EXEC|_DEBUG_FLAG_TRACE_RD|\
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_DEBUG_FLAG_TRACE_WR|_DEBUG_FLAG_TRACE_MODIFY)
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int ctl_fd;
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static void (*ofunc) ();
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static procfs_run run;
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static ptid_t do_attach (ptid_t ptid);
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static int procfs_can_use_hw_breakpoint (struct target_ops *self,
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int, int, int);
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static int procfs_insert_hw_watchpoint (struct target_ops *self,
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CORE_ADDR addr, int len, int type,
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struct expression *cond);
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static int procfs_remove_hw_watchpoint (struct target_ops *self,
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CORE_ADDR addr, int len, int type,
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struct expression *cond);
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static int procfs_stopped_by_watchpoint (struct target_ops *ops);
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/* These two globals are only ever set in procfs_open_1, but are
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referenced elsewhere. 'nto_procfs_node' is a flag used to say
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whether we are local, or we should get the current node descriptor
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for the remote QNX node. */
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static char nto_procfs_path[PATH_MAX] = { "/proc" };
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static unsigned nto_procfs_node = ND_LOCAL_NODE;
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/* Return the current QNX Node, or error out. This is a simple
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wrapper for the netmgr_strtond() function. The reason this
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is required is because QNX node descriptors are transient so
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we have to re-acquire them every time. */
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static unsigned
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nto_node (void)
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{
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unsigned node;
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if (ND_NODE_CMP (nto_procfs_node, ND_LOCAL_NODE) == 0)
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return ND_LOCAL_NODE;
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node = netmgr_strtond (nto_procfs_path, 0);
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if (node == -1)
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error (_("Lost the QNX node. Debug session probably over."));
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return (node);
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}
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static enum gdb_osabi
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procfs_is_nto_target (bfd *abfd)
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{
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return GDB_OSABI_QNXNTO;
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}
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/* This is called when we call 'target native' or 'target procfs
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<arg>' from the (gdb) prompt. For QNX6 (nto), the only valid arg
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will be a QNX node string, eg: "/net/some_node". If arg is not a
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valid QNX node, we will default to local. */
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static void
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procfs_open_1 (struct target_ops *ops, const char *arg, int from_tty)
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{
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char *nodestr;
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char *endstr;
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char buffer[50];
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int fd, total_size;
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procfs_sysinfo *sysinfo;
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struct cleanup *cleanups;
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/* Offer to kill previous inferiors before opening this target. */
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target_preopen (from_tty);
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nto_is_nto_target = procfs_is_nto_target;
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/* Set the default node used for spawning to this one,
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and only override it if there is a valid arg. */
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nto_procfs_node = ND_LOCAL_NODE;
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nodestr = arg ? xstrdup (arg) : arg;
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init_thread_list ();
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if (nodestr)
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{
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nto_procfs_node = netmgr_strtond (nodestr, &endstr);
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if (nto_procfs_node == -1)
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{
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if (errno == ENOTSUP)
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printf_filtered ("QNX Net Manager not found.\n");
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printf_filtered ("Invalid QNX node %s: error %d (%s).\n", nodestr,
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errno, safe_strerror (errno));
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xfree (nodestr);
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nodestr = NULL;
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nto_procfs_node = ND_LOCAL_NODE;
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}
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else if (*endstr)
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{
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if (*(endstr - 1) == '/')
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*(endstr - 1) = 0;
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else
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*endstr = 0;
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}
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}
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snprintf (nto_procfs_path, PATH_MAX - 1, "%s%s", nodestr ? nodestr : "",
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"/proc");
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if (nodestr)
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xfree (nodestr);
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fd = open (nto_procfs_path, O_RDONLY);
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if (fd == -1)
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{
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printf_filtered ("Error opening %s : %d (%s)\n", nto_procfs_path, errno,
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safe_strerror (errno));
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error (_("Invalid procfs arg"));
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}
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cleanups = make_cleanup_close (fd);
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sysinfo = (void *) buffer;
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if (devctl (fd, DCMD_PROC_SYSINFO, sysinfo, sizeof buffer, 0) != EOK)
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{
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printf_filtered ("Error getting size: %d (%s)\n", errno,
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safe_strerror (errno));
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error (_("Devctl failed."));
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}
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else
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{
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total_size = sysinfo->total_size;
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sysinfo = alloca (total_size);
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if (!sysinfo)
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{
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printf_filtered ("Memory error: %d (%s)\n", errno,
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safe_strerror (errno));
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error (_("alloca failed."));
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}
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else
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{
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if (devctl (fd, DCMD_PROC_SYSINFO, sysinfo, total_size, 0) != EOK)
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{
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printf_filtered ("Error getting sysinfo: %d (%s)\n", errno,
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safe_strerror (errno));
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error (_("Devctl failed."));
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}
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else
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{
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if (sysinfo->type !=
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nto_map_arch_to_cputype (gdbarch_bfd_arch_info
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(target_gdbarch ())->arch_name))
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error (_("Invalid target CPU."));
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}
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}
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}
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do_cleanups (cleanups);
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inf_child_open_target (ops, arg, from_tty);
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printf_filtered ("Debugging using %s\n", nto_procfs_path);
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}
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static void
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procfs_set_thread (ptid_t ptid)
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{
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pid_t tid;
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tid = ptid_get_tid (ptid);
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devctl (ctl_fd, DCMD_PROC_CURTHREAD, &tid, sizeof (tid), 0);
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}
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/* Return nonzero if the thread TH is still alive. */
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static int
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procfs_thread_alive (struct target_ops *ops, ptid_t ptid)
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{
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pid_t tid;
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pid_t pid;
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procfs_status status;
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int err;
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tid = ptid_get_tid (ptid);
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pid = ptid_get_pid (ptid);
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if (kill (pid, 0) == -1)
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return 0;
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status.tid = tid;
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if ((err = devctl (ctl_fd, DCMD_PROC_TIDSTATUS,
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&status, sizeof (status), 0)) != EOK)
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return 0;
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/* Thread is alive or dead but not yet joined,
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or dead and there is an alive (or dead unjoined) thread with
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higher tid.
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If the tid is not the same as requested, requested tid is dead. */
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return (status.tid == tid) && (status.state != STATE_DEAD);
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}
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static void
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update_thread_private_data_name (struct thread_info *new_thread,
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const char *newname)
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{
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int newnamelen;
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struct private_thread_info *pti;
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gdb_assert (newname != NULL);
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gdb_assert (new_thread != NULL);
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newnamelen = strlen (newname);
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if (!new_thread->private)
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{
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new_thread->private = xmalloc (offsetof (struct private_thread_info,
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name)
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+ newnamelen + 1);
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memcpy (new_thread->private->name, newname, newnamelen + 1);
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}
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else if (strcmp (newname, new_thread->private->name) != 0)
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{
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/* Reallocate if neccessary. */
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int oldnamelen = strlen (new_thread->private->name);
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if (oldnamelen < newnamelen)
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new_thread->private = xrealloc (new_thread->private,
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offsetof (struct private_thread_info,
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name)
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+ newnamelen + 1);
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memcpy (new_thread->private->name, newname, newnamelen + 1);
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}
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}
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static void
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update_thread_private_data (struct thread_info *new_thread,
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pthread_t tid, int state, int flags)
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{
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struct private_thread_info *pti;
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procfs_info pidinfo;
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struct _thread_name *tn;
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procfs_threadctl tctl;
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#if _NTO_VERSION > 630
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gdb_assert (new_thread != NULL);
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if (devctl (ctl_fd, DCMD_PROC_INFO, &pidinfo,
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sizeof(pidinfo), 0) != EOK)
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return;
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memset (&tctl, 0, sizeof (tctl));
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tctl.cmd = _NTO_TCTL_NAME;
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tn = (struct _thread_name *) (&tctl.data);
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/* Fetch name for the given thread. */
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tctl.tid = tid;
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tn->name_buf_len = sizeof (tctl.data) - sizeof (*tn);
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tn->new_name_len = -1; /* Getting, not setting. */
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if (devctl (ctl_fd, DCMD_PROC_THREADCTL, &tctl, sizeof (tctl), NULL) != EOK)
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tn->name_buf[0] = '\0';
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tn->name_buf[_NTO_THREAD_NAME_MAX] = '\0';
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update_thread_private_data_name (new_thread, tn->name_buf);
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pti = (struct private_thread_info *) new_thread->private;
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pti->tid = tid;
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pti->state = state;
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pti->flags = flags;
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#endif /* _NTO_VERSION */
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}
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static void
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procfs_update_thread_list (struct target_ops *ops)
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{
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procfs_status status;
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pid_t pid;
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ptid_t ptid;
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pthread_t tid;
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struct thread_info *new_thread;
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if (ctl_fd == -1)
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return;
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prune_threads ();
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pid = ptid_get_pid (inferior_ptid);
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status.tid = 1;
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for (tid = 1;; ++tid)
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{
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if (status.tid == tid
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&& (devctl (ctl_fd, DCMD_PROC_TIDSTATUS, &status, sizeof (status), 0)
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!= EOK))
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break;
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if (status.tid != tid)
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/* The reason why this would not be equal is that devctl might have
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returned different tid, meaning the requested tid no longer exists
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(e.g. thread exited). */
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continue;
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ptid = ptid_build (pid, 0, tid);
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new_thread = find_thread_ptid (ptid);
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if (!new_thread)
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new_thread = add_thread (ptid);
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update_thread_private_data (new_thread, tid, status.state, 0);
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status.tid++;
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}
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return;
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}
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static void
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do_closedir_cleanup (void *dir)
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{
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closedir (dir);
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}
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void
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procfs_pidlist (char *args, int from_tty)
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{
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DIR *dp = NULL;
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struct dirent *dirp = NULL;
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char buf[512];
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procfs_info *pidinfo = NULL;
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procfs_debuginfo *info = NULL;
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procfs_status *status = NULL;
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pid_t num_threads = 0;
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pid_t pid;
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char name[512];
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struct cleanup *cleanups;
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dp = opendir (nto_procfs_path);
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if (dp == NULL)
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{
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fprintf_unfiltered (gdb_stderr, "failed to opendir \"%s\" - %d (%s)",
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nto_procfs_path, errno, safe_strerror (errno));
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return;
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}
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cleanups = make_cleanup (do_closedir_cleanup, dp);
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/* Start scan at first pid. */
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rewinddir (dp);
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do
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{
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int fd;
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struct cleanup *inner_cleanup;
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/* Get the right pid and procfs path for the pid. */
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do
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{
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dirp = readdir (dp);
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if (dirp == NULL)
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{
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do_cleanups (cleanups);
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return;
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}
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snprintf (buf, 511, "%s/%s/as", nto_procfs_path, dirp->d_name);
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pid = atoi (dirp->d_name);
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}
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while (pid == 0);
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/* Open the procfs path. */
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fd = open (buf, O_RDONLY);
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if (fd == -1)
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{
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fprintf_unfiltered (gdb_stderr, "failed to open %s - %d (%s)\n",
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buf, errno, safe_strerror (errno));
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do_cleanups (cleanups);
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return;
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}
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inner_cleanup = make_cleanup_close (fd);
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pidinfo = (procfs_info *) buf;
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if (devctl (fd, DCMD_PROC_INFO, pidinfo, sizeof (buf), 0) != EOK)
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{
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fprintf_unfiltered (gdb_stderr,
|
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"devctl DCMD_PROC_INFO failed - %d (%s)\n",
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errno, safe_strerror (errno));
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break;
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}
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num_threads = pidinfo->num_threads;
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info = (procfs_debuginfo *) buf;
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if (devctl (fd, DCMD_PROC_MAPDEBUG_BASE, info, sizeof (buf), 0) != EOK)
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strcpy (name, "unavailable");
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else
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strcpy (name, info->path);
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|
|
/* Collect state info on all the threads. */
|
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status = (procfs_status *) buf;
|
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for (status->tid = 1; status->tid <= num_threads; status->tid++)
|
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{
|
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if (devctl (fd, DCMD_PROC_TIDSTATUS, status, sizeof (buf), 0) != EOK
|
|
&& status->tid != 0)
|
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break;
|
|
if (status->tid != 0)
|
|
printf_filtered ("%s - %d/%d\n", name, pid, status->tid);
|
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}
|
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|
|
do_cleanups (inner_cleanup);
|
|
}
|
|
while (dirp != NULL);
|
|
|
|
do_cleanups (cleanups);
|
|
return;
|
|
}
|
|
|
|
void
|
|
procfs_meminfo (char *args, int from_tty)
|
|
{
|
|
procfs_mapinfo *mapinfos = NULL;
|
|
static int num_mapinfos = 0;
|
|
procfs_mapinfo *mapinfo_p, *mapinfo_p2;
|
|
int flags = ~0, err, num, i, j;
|
|
|
|
struct
|
|
{
|
|
procfs_debuginfo info;
|
|
char buff[_POSIX_PATH_MAX];
|
|
} map;
|
|
|
|
struct info
|
|
{
|
|
unsigned addr;
|
|
unsigned size;
|
|
unsigned flags;
|
|
unsigned debug_vaddr;
|
|
unsigned long long offset;
|
|
};
|
|
|
|
struct printinfo
|
|
{
|
|
unsigned long long ino;
|
|
unsigned dev;
|
|
struct info text;
|
|
struct info data;
|
|
char name[256];
|
|
} printme;
|
|
|
|
/* Get the number of map entrys. */
|
|
err = devctl (ctl_fd, DCMD_PROC_MAPINFO, NULL, 0, &num);
|
|
if (err != EOK)
|
|
{
|
|
printf ("failed devctl num mapinfos - %d (%s)\n", err,
|
|
safe_strerror (err));
|
|
return;
|
|
}
|
|
|
|
mapinfos = xmalloc (num * sizeof (procfs_mapinfo));
|
|
|
|
num_mapinfos = num;
|
|
mapinfo_p = mapinfos;
|
|
|
|
/* Fill the map entrys. */
|
|
err = devctl (ctl_fd, DCMD_PROC_MAPINFO, mapinfo_p, num
|
|
* sizeof (procfs_mapinfo), &num);
|
|
if (err != EOK)
|
|
{
|
|
printf ("failed devctl mapinfos - %d (%s)\n", err, safe_strerror (err));
|
|
xfree (mapinfos);
|
|
return;
|
|
}
|
|
|
|
num = min (num, num_mapinfos);
|
|
|
|
/* Run through the list of mapinfos, and store the data and text info
|
|
so we can print it at the bottom of the loop. */
|
|
for (mapinfo_p = mapinfos, i = 0; i < num; i++, mapinfo_p++)
|
|
{
|
|
if (!(mapinfo_p->flags & flags))
|
|
mapinfo_p->ino = 0;
|
|
|
|
if (mapinfo_p->ino == 0) /* Already visited. */
|
|
continue;
|
|
|
|
map.info.vaddr = mapinfo_p->vaddr;
|
|
|
|
err = devctl (ctl_fd, DCMD_PROC_MAPDEBUG, &map, sizeof (map), 0);
|
|
if (err != EOK)
|
|
continue;
|
|
|
|
memset (&printme, 0, sizeof printme);
|
|
printme.dev = mapinfo_p->dev;
|
|
printme.ino = mapinfo_p->ino;
|
|
printme.text.addr = mapinfo_p->vaddr;
|
|
printme.text.size = mapinfo_p->size;
|
|
printme.text.flags = mapinfo_p->flags;
|
|
printme.text.offset = mapinfo_p->offset;
|
|
printme.text.debug_vaddr = map.info.vaddr;
|
|
strcpy (printme.name, map.info.path);
|
|
|
|
/* Check for matching data. */
|
|
for (mapinfo_p2 = mapinfos, j = 0; j < num; j++, mapinfo_p2++)
|
|
{
|
|
if (mapinfo_p2->vaddr != mapinfo_p->vaddr
|
|
&& mapinfo_p2->ino == mapinfo_p->ino
|
|
&& mapinfo_p2->dev == mapinfo_p->dev)
|
|
{
|
|
map.info.vaddr = mapinfo_p2->vaddr;
|
|
err =
|
|
devctl (ctl_fd, DCMD_PROC_MAPDEBUG, &map, sizeof (map), 0);
|
|
if (err != EOK)
|
|
continue;
|
|
|
|
if (strcmp (map.info.path, printme.name))
|
|
continue;
|
|
|
|
/* Lower debug_vaddr is always text, if nessessary, swap. */
|
|
if ((int) map.info.vaddr < (int) printme.text.debug_vaddr)
|
|
{
|
|
memcpy (&(printme.data), &(printme.text),
|
|
sizeof (printme.data));
|
|
printme.text.addr = mapinfo_p2->vaddr;
|
|
printme.text.size = mapinfo_p2->size;
|
|
printme.text.flags = mapinfo_p2->flags;
|
|
printme.text.offset = mapinfo_p2->offset;
|
|
printme.text.debug_vaddr = map.info.vaddr;
|
|
}
|
|
else
|
|
{
|
|
printme.data.addr = mapinfo_p2->vaddr;
|
|
printme.data.size = mapinfo_p2->size;
|
|
printme.data.flags = mapinfo_p2->flags;
|
|
printme.data.offset = mapinfo_p2->offset;
|
|
printme.data.debug_vaddr = map.info.vaddr;
|
|
}
|
|
mapinfo_p2->ino = 0;
|
|
}
|
|
}
|
|
mapinfo_p->ino = 0;
|
|
|
|
printf_filtered ("%s\n", printme.name);
|
|
printf_filtered ("\ttext=%08x bytes @ 0x%08x\n", printme.text.size,
|
|
printme.text.addr);
|
|
printf_filtered ("\t\tflags=%08x\n", printme.text.flags);
|
|
printf_filtered ("\t\tdebug=%08x\n", printme.text.debug_vaddr);
|
|
printf_filtered ("\t\toffset=%s\n", phex (printme.text.offset, 8));
|
|
if (printme.data.size)
|
|
{
|
|
printf_filtered ("\tdata=%08x bytes @ 0x%08x\n", printme.data.size,
|
|
printme.data.addr);
|
|
printf_filtered ("\t\tflags=%08x\n", printme.data.flags);
|
|
printf_filtered ("\t\tdebug=%08x\n", printme.data.debug_vaddr);
|
|
printf_filtered ("\t\toffset=%s\n", phex (printme.data.offset, 8));
|
|
}
|
|
printf_filtered ("\tdev=0x%x\n", printme.dev);
|
|
printf_filtered ("\tino=0x%x\n", (unsigned int) printme.ino);
|
|
}
|
|
xfree (mapinfos);
|
|
return;
|
|
}
|
|
|
|
/* Print status information about what we're accessing. */
|
|
static void
|
|
procfs_files_info (struct target_ops *ignore)
|
|
{
|
|
struct inferior *inf = current_inferior ();
|
|
|
|
printf_unfiltered ("\tUsing the running image of %s %s via %s.\n",
|
|
inf->attach_flag ? "attached" : "child",
|
|
target_pid_to_str (inferior_ptid), nto_procfs_path);
|
|
}
|
|
|
|
/* Attach to process PID, then initialize for debugging it. */
|
|
static void
|
|
procfs_attach (struct target_ops *ops, const char *args, int from_tty)
|
|
{
|
|
char *exec_file;
|
|
int pid;
|
|
struct inferior *inf;
|
|
|
|
pid = parse_pid_to_attach (args);
|
|
|
|
if (pid == getpid ())
|
|
error (_("Attaching GDB to itself is not a good idea..."));
|
|
|
|
if (from_tty)
|
|
{
|
|
exec_file = (char *) get_exec_file (0);
|
|
|
|
if (exec_file)
|
|
printf_unfiltered ("Attaching to program `%s', %s\n", exec_file,
|
|
target_pid_to_str (pid_to_ptid (pid)));
|
|
else
|
|
printf_unfiltered ("Attaching to %s\n",
|
|
target_pid_to_str (pid_to_ptid (pid)));
|
|
|
|
gdb_flush (gdb_stdout);
|
|
}
|
|
inferior_ptid = do_attach (pid_to_ptid (pid));
|
|
inf = current_inferior ();
|
|
inferior_appeared (inf, pid);
|
|
inf->attach_flag = 1;
|
|
|
|
if (!target_is_pushed (ops))
|
|
push_target (ops);
|
|
|
|
procfs_update_thread_list (ops);
|
|
}
|
|
|
|
static void
|
|
procfs_post_attach (struct target_ops *self, pid_t pid)
|
|
{
|
|
if (exec_bfd)
|
|
solib_create_inferior_hook (0);
|
|
}
|
|
|
|
static ptid_t
|
|
do_attach (ptid_t ptid)
|
|
{
|
|
procfs_status status;
|
|
struct sigevent event;
|
|
char path[PATH_MAX];
|
|
|
|
snprintf (path, PATH_MAX - 1, "%s/%d/as", nto_procfs_path,
|
|
ptid_get_pid (ptid));
|
|
ctl_fd = open (path, O_RDWR);
|
|
if (ctl_fd == -1)
|
|
error (_("Couldn't open proc file %s, error %d (%s)"), path, errno,
|
|
safe_strerror (errno));
|
|
if (devctl (ctl_fd, DCMD_PROC_STOP, &status, sizeof (status), 0) != EOK)
|
|
error (_("Couldn't stop process"));
|
|
|
|
/* Define a sigevent for process stopped notification. */
|
|
event.sigev_notify = SIGEV_SIGNAL_THREAD;
|
|
event.sigev_signo = SIGUSR1;
|
|
event.sigev_code = 0;
|
|
event.sigev_value.sival_ptr = NULL;
|
|
event.sigev_priority = -1;
|
|
devctl (ctl_fd, DCMD_PROC_EVENT, &event, sizeof (event), 0);
|
|
|
|
if (devctl (ctl_fd, DCMD_PROC_STATUS, &status, sizeof (status), 0) == EOK
|
|
&& status.flags & _DEBUG_FLAG_STOPPED)
|
|
SignalKill (nto_node (), ptid_get_pid (ptid), 0, SIGCONT, 0, 0);
|
|
nto_init_solib_absolute_prefix ();
|
|
return ptid_build (ptid_get_pid (ptid), 0, status.tid);
|
|
}
|
|
|
|
/* Ask the user what to do when an interrupt is received. */
|
|
static void
|
|
interrupt_query (void)
|
|
{
|
|
target_terminal_ours ();
|
|
|
|
if (query (_("Interrupted while waiting for the program.\n\
|
|
Give up (and stop debugging it)? ")))
|
|
{
|
|
target_mourn_inferior ();
|
|
quit ();
|
|
}
|
|
|
|
target_terminal_inferior ();
|
|
}
|
|
|
|
/* The user typed ^C twice. */
|
|
static void
|
|
nto_interrupt_twice (int signo)
|
|
{
|
|
signal (signo, ofunc);
|
|
interrupt_query ();
|
|
signal (signo, nto_interrupt_twice);
|
|
}
|
|
|
|
static void
|
|
nto_interrupt (int signo)
|
|
{
|
|
/* If this doesn't work, try more severe steps. */
|
|
signal (signo, nto_interrupt_twice);
|
|
|
|
target_stop (inferior_ptid);
|
|
}
|
|
|
|
static ptid_t
|
|
procfs_wait (struct target_ops *ops,
|
|
ptid_t ptid, struct target_waitstatus *ourstatus, int options)
|
|
{
|
|
sigset_t set;
|
|
siginfo_t info;
|
|
procfs_status status;
|
|
static int exit_signo = 0; /* To track signals that cause termination. */
|
|
|
|
ourstatus->kind = TARGET_WAITKIND_SPURIOUS;
|
|
|
|
if (ptid_equal (inferior_ptid, null_ptid))
|
|
{
|
|
ourstatus->kind = TARGET_WAITKIND_STOPPED;
|
|
ourstatus->value.sig = GDB_SIGNAL_0;
|
|
exit_signo = 0;
|
|
return null_ptid;
|
|
}
|
|
|
|
sigemptyset (&set);
|
|
sigaddset (&set, SIGUSR1);
|
|
|
|
devctl (ctl_fd, DCMD_PROC_STATUS, &status, sizeof (status), 0);
|
|
while (!(status.flags & _DEBUG_FLAG_ISTOP))
|
|
{
|
|
ofunc = (void (*)()) signal (SIGINT, nto_interrupt);
|
|
sigwaitinfo (&set, &info);
|
|
signal (SIGINT, ofunc);
|
|
devctl (ctl_fd, DCMD_PROC_STATUS, &status, sizeof (status), 0);
|
|
}
|
|
|
|
if (status.flags & _DEBUG_FLAG_SSTEP)
|
|
{
|
|
ourstatus->kind = TARGET_WAITKIND_STOPPED;
|
|
ourstatus->value.sig = GDB_SIGNAL_TRAP;
|
|
}
|
|
/* Was it a breakpoint? */
|
|
else if (status.flags & _DEBUG_FLAG_TRACE)
|
|
{
|
|
ourstatus->kind = TARGET_WAITKIND_STOPPED;
|
|
ourstatus->value.sig = GDB_SIGNAL_TRAP;
|
|
}
|
|
else if (status.flags & _DEBUG_FLAG_ISTOP)
|
|
{
|
|
switch (status.why)
|
|
{
|
|
case _DEBUG_WHY_SIGNALLED:
|
|
ourstatus->kind = TARGET_WAITKIND_STOPPED;
|
|
ourstatus->value.sig =
|
|
gdb_signal_from_host (status.info.si_signo);
|
|
exit_signo = 0;
|
|
break;
|
|
case _DEBUG_WHY_FAULTED:
|
|
ourstatus->kind = TARGET_WAITKIND_STOPPED;
|
|
if (status.info.si_signo == SIGTRAP)
|
|
{
|
|
ourstatus->value.sig = 0;
|
|
exit_signo = 0;
|
|
}
|
|
else
|
|
{
|
|
ourstatus->value.sig =
|
|
gdb_signal_from_host (status.info.si_signo);
|
|
exit_signo = ourstatus->value.sig;
|
|
}
|
|
break;
|
|
|
|
case _DEBUG_WHY_TERMINATED:
|
|
{
|
|
int waitval = 0;
|
|
|
|
waitpid (ptid_get_pid (inferior_ptid), &waitval, WNOHANG);
|
|
if (exit_signo)
|
|
{
|
|
/* Abnormal death. */
|
|
ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
|
|
ourstatus->value.sig = exit_signo;
|
|
}
|
|
else
|
|
{
|
|
/* Normal death. */
|
|
ourstatus->kind = TARGET_WAITKIND_EXITED;
|
|
ourstatus->value.integer = WEXITSTATUS (waitval);
|
|
}
|
|
exit_signo = 0;
|
|
break;
|
|
}
|
|
|
|
case _DEBUG_WHY_REQUESTED:
|
|
/* We are assuming a requested stop is due to a SIGINT. */
|
|
ourstatus->kind = TARGET_WAITKIND_STOPPED;
|
|
ourstatus->value.sig = GDB_SIGNAL_INT;
|
|
exit_signo = 0;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return ptid_build (status.pid, 0, status.tid);
|
|
}
|
|
|
|
/* Read the current values of the inferior's registers, both the
|
|
general register set and floating point registers (if supported)
|
|
and update gdb's idea of their current values. */
|
|
static void
|
|
procfs_fetch_registers (struct target_ops *ops,
|
|
struct regcache *regcache, int regno)
|
|
{
|
|
union
|
|
{
|
|
procfs_greg greg;
|
|
procfs_fpreg fpreg;
|
|
procfs_altreg altreg;
|
|
}
|
|
reg;
|
|
int regsize;
|
|
|
|
procfs_set_thread (inferior_ptid);
|
|
if (devctl (ctl_fd, DCMD_PROC_GETGREG, ®, sizeof (reg), ®size) == EOK)
|
|
nto_supply_gregset (regcache, (char *) ®.greg);
|
|
if (devctl (ctl_fd, DCMD_PROC_GETFPREG, ®, sizeof (reg), ®size)
|
|
== EOK)
|
|
nto_supply_fpregset (regcache, (char *) ®.fpreg);
|
|
if (devctl (ctl_fd, DCMD_PROC_GETALTREG, ®, sizeof (reg), ®size)
|
|
== EOK)
|
|
nto_supply_altregset (regcache, (char *) ®.altreg);
|
|
}
|
|
|
|
/* Helper for procfs_xfer_partial that handles memory transfers.
|
|
Arguments are like target_xfer_partial. */
|
|
|
|
static enum target_xfer_status
|
|
procfs_xfer_memory (gdb_byte *readbuf, const gdb_byte *writebuf,
|
|
ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len)
|
|
{
|
|
int nbytes;
|
|
|
|
if (lseek (ctl_fd, (off_t) memaddr, SEEK_SET) != (off_t) memaddr)
|
|
return TARGET_XFER_E_IO;
|
|
|
|
if (writebuf != NULL)
|
|
nbytes = write (ctl_fd, writebuf, len);
|
|
else
|
|
nbytes = read (ctl_fd, readbuf, len);
|
|
if (nbytes <= 0)
|
|
return TARGET_XFER_E_IO;
|
|
*xfered_len = nbytes;
|
|
return TARGET_XFER_OK;
|
|
}
|
|
|
|
/* Target to_xfer_partial implementation. */
|
|
|
|
static enum target_xfer_status
|
|
procfs_xfer_partial (struct target_ops *ops, enum target_object object,
|
|
const char *annex, gdb_byte *readbuf,
|
|
const gdb_byte *writebuf, ULONGEST offset, ULONGEST len,
|
|
ULONGEST *xfered_len)
|
|
{
|
|
switch (object)
|
|
{
|
|
case TARGET_OBJECT_MEMORY:
|
|
return procfs_xfer_memory (readbuf, writebuf, offset, len, xfered_len);
|
|
default:
|
|
return ops->beneath->to_xfer_partial (ops->beneath, object, annex,
|
|
readbuf, writebuf, offset, len);
|
|
}
|
|
}
|
|
|
|
/* Take a program previously attached to and detaches it.
|
|
The program resumes execution and will no longer stop
|
|
on signals, etc. We'd better not have left any breakpoints
|
|
in the program or it'll die when it hits one. */
|
|
static void
|
|
procfs_detach (struct target_ops *ops, const char *args, int from_tty)
|
|
{
|
|
int siggnal = 0;
|
|
int pid;
|
|
|
|
if (from_tty)
|
|
{
|
|
char *exec_file = get_exec_file (0);
|
|
if (exec_file == 0)
|
|
exec_file = "";
|
|
printf_unfiltered ("Detaching from program: %s %s\n",
|
|
exec_file, target_pid_to_str (inferior_ptid));
|
|
gdb_flush (gdb_stdout);
|
|
}
|
|
if (args)
|
|
siggnal = atoi (args);
|
|
|
|
if (siggnal)
|
|
SignalKill (nto_node (), ptid_get_pid (inferior_ptid), 0, siggnal, 0, 0);
|
|
|
|
close (ctl_fd);
|
|
ctl_fd = -1;
|
|
|
|
pid = ptid_get_pid (inferior_ptid);
|
|
inferior_ptid = null_ptid;
|
|
detach_inferior (pid);
|
|
init_thread_list ();
|
|
inf_child_maybe_unpush_target (ops);
|
|
}
|
|
|
|
static int
|
|
procfs_breakpoint (CORE_ADDR addr, int type, int size)
|
|
{
|
|
procfs_break brk;
|
|
|
|
brk.type = type;
|
|
brk.addr = addr;
|
|
brk.size = size;
|
|
errno = devctl (ctl_fd, DCMD_PROC_BREAK, &brk, sizeof (brk), 0);
|
|
if (errno != EOK)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
procfs_insert_breakpoint (struct target_ops *ops, struct gdbarch *gdbarch,
|
|
struct bp_target_info *bp_tgt)
|
|
{
|
|
bp_tgt->placed_address = bp_tgt->reqstd_address;
|
|
return procfs_breakpoint (bp_tgt->placed_address, _DEBUG_BREAK_EXEC, 0);
|
|
}
|
|
|
|
static int
|
|
procfs_remove_breakpoint (struct target_ops *ops, struct gdbarch *gdbarch,
|
|
struct bp_target_info *bp_tgt)
|
|
{
|
|
return procfs_breakpoint (bp_tgt->placed_address, _DEBUG_BREAK_EXEC, -1);
|
|
}
|
|
|
|
static int
|
|
procfs_insert_hw_breakpoint (struct target_ops *self, struct gdbarch *gdbarch,
|
|
struct bp_target_info *bp_tgt)
|
|
{
|
|
bp_tgt->placed_address = bp_tgt->reqstd_address;
|
|
return procfs_breakpoint (bp_tgt->placed_address,
|
|
_DEBUG_BREAK_EXEC | _DEBUG_BREAK_HW, 0);
|
|
}
|
|
|
|
static int
|
|
procfs_remove_hw_breakpoint (struct target_ops *self,
|
|
struct gdbarch *gdbarch,
|
|
struct bp_target_info *bp_tgt)
|
|
{
|
|
return procfs_breakpoint (bp_tgt->placed_address,
|
|
_DEBUG_BREAK_EXEC | _DEBUG_BREAK_HW, -1);
|
|
}
|
|
|
|
static void
|
|
procfs_resume (struct target_ops *ops,
|
|
ptid_t ptid, int step, enum gdb_signal signo)
|
|
{
|
|
int signal_to_pass;
|
|
procfs_status status;
|
|
sigset_t *run_fault = (sigset_t *) (void *) &run.fault;
|
|
|
|
if (ptid_equal (inferior_ptid, null_ptid))
|
|
return;
|
|
|
|
procfs_set_thread (ptid_equal (ptid, minus_one_ptid) ? inferior_ptid :
|
|
ptid);
|
|
|
|
run.flags = _DEBUG_RUN_FAULT | _DEBUG_RUN_TRACE;
|
|
if (step)
|
|
run.flags |= _DEBUG_RUN_STEP;
|
|
|
|
sigemptyset (run_fault);
|
|
sigaddset (run_fault, FLTBPT);
|
|
sigaddset (run_fault, FLTTRACE);
|
|
sigaddset (run_fault, FLTILL);
|
|
sigaddset (run_fault, FLTPRIV);
|
|
sigaddset (run_fault, FLTBOUNDS);
|
|
sigaddset (run_fault, FLTIOVF);
|
|
sigaddset (run_fault, FLTIZDIV);
|
|
sigaddset (run_fault, FLTFPE);
|
|
/* Peter V will be changing this at some point. */
|
|
sigaddset (run_fault, FLTPAGE);
|
|
|
|
run.flags |= _DEBUG_RUN_ARM;
|
|
|
|
signal_to_pass = gdb_signal_to_host (signo);
|
|
|
|
if (signal_to_pass)
|
|
{
|
|
devctl (ctl_fd, DCMD_PROC_STATUS, &status, sizeof (status), 0);
|
|
signal_to_pass = gdb_signal_to_host (signo);
|
|
if (status.why & (_DEBUG_WHY_SIGNALLED | _DEBUG_WHY_FAULTED))
|
|
{
|
|
if (signal_to_pass != status.info.si_signo)
|
|
{
|
|
SignalKill (nto_node (), ptid_get_pid (inferior_ptid), 0,
|
|
signal_to_pass, 0, 0);
|
|
run.flags |= _DEBUG_RUN_CLRFLT | _DEBUG_RUN_CLRSIG;
|
|
}
|
|
else /* Let it kill the program without telling us. */
|
|
sigdelset (&run.trace, signal_to_pass);
|
|
}
|
|
}
|
|
else
|
|
run.flags |= _DEBUG_RUN_CLRSIG | _DEBUG_RUN_CLRFLT;
|
|
|
|
errno = devctl (ctl_fd, DCMD_PROC_RUN, &run, sizeof (run), 0);
|
|
if (errno != EOK)
|
|
{
|
|
perror (_("run error!\n"));
|
|
return;
|
|
}
|
|
}
|
|
|
|
static void
|
|
procfs_mourn_inferior (struct target_ops *ops)
|
|
{
|
|
if (!ptid_equal (inferior_ptid, null_ptid))
|
|
{
|
|
SignalKill (nto_node (), ptid_get_pid (inferior_ptid), 0, SIGKILL, 0, 0);
|
|
close (ctl_fd);
|
|
}
|
|
inferior_ptid = null_ptid;
|
|
init_thread_list ();
|
|
inf_child_mourn_inferior (ops);
|
|
}
|
|
|
|
/* This function breaks up an argument string into an argument
|
|
vector suitable for passing to execvp().
|
|
E.g., on "run a b c d" this routine would get as input
|
|
the string "a b c d", and as output it would fill in argv with
|
|
the four arguments "a", "b", "c", "d". The only additional
|
|
functionality is simple quoting. The gdb command:
|
|
run a "b c d" f
|
|
will fill in argv with the three args "a", "b c d", "e". */
|
|
static void
|
|
breakup_args (char *scratch, char **argv)
|
|
{
|
|
char *pp, *cp = scratch;
|
|
char quoting = 0;
|
|
|
|
for (;;)
|
|
{
|
|
/* Scan past leading separators. */
|
|
quoting = 0;
|
|
while (*cp == ' ' || *cp == '\t' || *cp == '\n')
|
|
cp++;
|
|
|
|
/* Break if at end of string. */
|
|
if (*cp == '\0')
|
|
break;
|
|
|
|
/* Take an arg. */
|
|
if (*cp == '"')
|
|
{
|
|
cp++;
|
|
quoting = strchr (cp, '"') ? 1 : 0;
|
|
}
|
|
|
|
*argv++ = cp;
|
|
|
|
/* Scan for next arg separator. */
|
|
pp = cp;
|
|
if (quoting)
|
|
cp = strchr (pp, '"');
|
|
if ((cp == NULL) || (!quoting))
|
|
cp = strchr (pp, ' ');
|
|
if (cp == NULL)
|
|
cp = strchr (pp, '\t');
|
|
if (cp == NULL)
|
|
cp = strchr (pp, '\n');
|
|
|
|
/* No separators => end of string => break. */
|
|
if (cp == NULL)
|
|
{
|
|
pp = cp;
|
|
break;
|
|
}
|
|
|
|
/* Replace the separator with a terminator. */
|
|
*cp++ = '\0';
|
|
}
|
|
|
|
/* Execv requires a null-terminated arg vector. */
|
|
*argv = NULL;
|
|
}
|
|
|
|
static void
|
|
procfs_create_inferior (struct target_ops *ops, char *exec_file,
|
|
char *allargs, char **env, int from_tty)
|
|
{
|
|
struct inheritance inherit;
|
|
pid_t pid;
|
|
int flags, errn;
|
|
char **argv, *args;
|
|
const char *in = "", *out = "", *err = "";
|
|
int fd, fds[3];
|
|
sigset_t set;
|
|
const char *inferior_io_terminal = get_inferior_io_terminal ();
|
|
struct inferior *inf;
|
|
|
|
argv = xmalloc (((strlen (allargs) + 1) / (unsigned) 2 + 2) *
|
|
sizeof (*argv));
|
|
argv[0] = get_exec_file (1);
|
|
if (!argv[0])
|
|
{
|
|
if (exec_file)
|
|
argv[0] = exec_file;
|
|
else
|
|
return;
|
|
}
|
|
|
|
args = xstrdup (allargs);
|
|
breakup_args (args, exec_file ? &argv[1] : &argv[0]);
|
|
|
|
argv = nto_parse_redirection (argv, &in, &out, &err);
|
|
|
|
fds[0] = STDIN_FILENO;
|
|
fds[1] = STDOUT_FILENO;
|
|
fds[2] = STDERR_FILENO;
|
|
|
|
/* If the user specified I/O via gdb's --tty= arg, use it, but only
|
|
if the i/o is not also being specified via redirection. */
|
|
if (inferior_io_terminal)
|
|
{
|
|
if (!in[0])
|
|
in = inferior_io_terminal;
|
|
if (!out[0])
|
|
out = inferior_io_terminal;
|
|
if (!err[0])
|
|
err = inferior_io_terminal;
|
|
}
|
|
|
|
if (in[0])
|
|
{
|
|
fd = open (in, O_RDONLY);
|
|
if (fd == -1)
|
|
perror (in);
|
|
else
|
|
fds[0] = fd;
|
|
}
|
|
if (out[0])
|
|
{
|
|
fd = open (out, O_WRONLY);
|
|
if (fd == -1)
|
|
perror (out);
|
|
else
|
|
fds[1] = fd;
|
|
}
|
|
if (err[0])
|
|
{
|
|
fd = open (err, O_WRONLY);
|
|
if (fd == -1)
|
|
perror (err);
|
|
else
|
|
fds[2] = fd;
|
|
}
|
|
|
|
/* Clear any pending SIGUSR1's but keep the behavior the same. */
|
|
signal (SIGUSR1, signal (SIGUSR1, SIG_IGN));
|
|
|
|
sigemptyset (&set);
|
|
sigaddset (&set, SIGUSR1);
|
|
sigprocmask (SIG_UNBLOCK, &set, NULL);
|
|
|
|
memset (&inherit, 0, sizeof (inherit));
|
|
|
|
if (ND_NODE_CMP (nto_procfs_node, ND_LOCAL_NODE) != 0)
|
|
{
|
|
inherit.nd = nto_node ();
|
|
inherit.flags |= SPAWN_SETND;
|
|
inherit.flags &= ~SPAWN_EXEC;
|
|
}
|
|
inherit.flags |= SPAWN_SETGROUP | SPAWN_HOLD;
|
|
inherit.pgroup = SPAWN_NEWPGROUP;
|
|
pid = spawnp (argv[0], 3, fds, &inherit, argv,
|
|
ND_NODE_CMP (nto_procfs_node, ND_LOCAL_NODE) == 0 ? env : 0);
|
|
xfree (args);
|
|
|
|
sigprocmask (SIG_BLOCK, &set, NULL);
|
|
|
|
if (pid == -1)
|
|
error (_("Error spawning %s: %d (%s)"), argv[0], errno,
|
|
safe_strerror (errno));
|
|
|
|
if (fds[0] != STDIN_FILENO)
|
|
close (fds[0]);
|
|
if (fds[1] != STDOUT_FILENO)
|
|
close (fds[1]);
|
|
if (fds[2] != STDERR_FILENO)
|
|
close (fds[2]);
|
|
|
|
inferior_ptid = do_attach (pid_to_ptid (pid));
|
|
procfs_update_thread_list (ops);
|
|
|
|
inf = current_inferior ();
|
|
inferior_appeared (inf, pid);
|
|
inf->attach_flag = 0;
|
|
|
|
flags = _DEBUG_FLAG_KLC; /* Kill-on-Last-Close flag. */
|
|
errn = devctl (ctl_fd, DCMD_PROC_SET_FLAG, &flags, sizeof (flags), 0);
|
|
if (errn != EOK)
|
|
{
|
|
/* FIXME: expected warning? */
|
|
/* warning( "Failed to set Kill-on-Last-Close flag: errno = %d(%s)\n",
|
|
errn, strerror(errn) ); */
|
|
}
|
|
if (!target_is_pushed (ops))
|
|
push_target (ops);
|
|
target_terminal_init ();
|
|
|
|
if (exec_bfd != NULL
|
|
|| (symfile_objfile != NULL && symfile_objfile->obfd != NULL))
|
|
solib_create_inferior_hook (0);
|
|
}
|
|
|
|
static void
|
|
procfs_stop (struct target_ops *self, ptid_t ptid)
|
|
{
|
|
devctl (ctl_fd, DCMD_PROC_STOP, NULL, 0, 0);
|
|
}
|
|
|
|
static void
|
|
procfs_kill_inferior (struct target_ops *ops)
|
|
{
|
|
target_mourn_inferior ();
|
|
}
|
|
|
|
/* Fill buf with regset and return devctl cmd to do the setting. Return
|
|
-1 if we fail to get the regset. Store size of regset in regsize. */
|
|
static int
|
|
get_regset (int regset, char *buf, int bufsize, int *regsize)
|
|
{
|
|
int dev_get, dev_set;
|
|
switch (regset)
|
|
{
|
|
case NTO_REG_GENERAL:
|
|
dev_get = DCMD_PROC_GETGREG;
|
|
dev_set = DCMD_PROC_SETGREG;
|
|
break;
|
|
|
|
case NTO_REG_FLOAT:
|
|
dev_get = DCMD_PROC_GETFPREG;
|
|
dev_set = DCMD_PROC_SETFPREG;
|
|
break;
|
|
|
|
case NTO_REG_ALT:
|
|
dev_get = DCMD_PROC_GETALTREG;
|
|
dev_set = DCMD_PROC_SETALTREG;
|
|
break;
|
|
|
|
case NTO_REG_SYSTEM:
|
|
default:
|
|
return -1;
|
|
}
|
|
if (devctl (ctl_fd, dev_get, buf, bufsize, regsize) != EOK)
|
|
return -1;
|
|
|
|
return dev_set;
|
|
}
|
|
|
|
void
|
|
procfs_store_registers (struct target_ops *ops,
|
|
struct regcache *regcache, int regno)
|
|
{
|
|
union
|
|
{
|
|
procfs_greg greg;
|
|
procfs_fpreg fpreg;
|
|
procfs_altreg altreg;
|
|
}
|
|
reg;
|
|
unsigned off;
|
|
int len, regset, regsize, dev_set, err;
|
|
char *data;
|
|
|
|
if (ptid_equal (inferior_ptid, null_ptid))
|
|
return;
|
|
procfs_set_thread (inferior_ptid);
|
|
|
|
if (regno == -1)
|
|
{
|
|
for (regset = NTO_REG_GENERAL; regset < NTO_REG_END; regset++)
|
|
{
|
|
dev_set = get_regset (regset, (char *) ®,
|
|
sizeof (reg), ®size);
|
|
if (dev_set == -1)
|
|
continue;
|
|
|
|
if (nto_regset_fill (regcache, regset, (char *) ®) == -1)
|
|
continue;
|
|
|
|
err = devctl (ctl_fd, dev_set, ®, regsize, 0);
|
|
if (err != EOK)
|
|
fprintf_unfiltered (gdb_stderr,
|
|
"Warning unable to write regset %d: %s\n",
|
|
regno, safe_strerror (err));
|
|
}
|
|
}
|
|
else
|
|
{
|
|
regset = nto_regset_id (regno);
|
|
if (regset == -1)
|
|
return;
|
|
|
|
dev_set = get_regset (regset, (char *) ®, sizeof (reg), ®size);
|
|
if (dev_set == -1)
|
|
return;
|
|
|
|
len = nto_register_area (get_regcache_arch (regcache),
|
|
regno, regset, &off);
|
|
|
|
if (len < 1)
|
|
return;
|
|
|
|
regcache_raw_collect (regcache, regno, (char *) ® + off);
|
|
|
|
err = devctl (ctl_fd, dev_set, ®, regsize, 0);
|
|
if (err != EOK)
|
|
fprintf_unfiltered (gdb_stderr,
|
|
"Warning unable to write regset %d: %s\n", regno,
|
|
safe_strerror (err));
|
|
}
|
|
}
|
|
|
|
/* Set list of signals to be handled in the target. */
|
|
|
|
static void
|
|
procfs_pass_signals (struct target_ops *self,
|
|
int numsigs, unsigned char *pass_signals)
|
|
{
|
|
int signo;
|
|
|
|
sigfillset (&run.trace);
|
|
|
|
for (signo = 1; signo < NSIG; signo++)
|
|
{
|
|
int target_signo = gdb_signal_from_host (signo);
|
|
if (target_signo < numsigs && pass_signals[target_signo])
|
|
sigdelset (&run.trace, signo);
|
|
}
|
|
}
|
|
|
|
static struct tidinfo *
|
|
procfs_thread_info (pid_t pid, short tid)
|
|
{
|
|
/* NYI */
|
|
return NULL;
|
|
}
|
|
|
|
static char *
|
|
procfs_pid_to_str (struct target_ops *ops, ptid_t ptid)
|
|
{
|
|
static char buf[1024];
|
|
int pid, tid, n;
|
|
struct tidinfo *tip;
|
|
|
|
pid = ptid_get_pid (ptid);
|
|
tid = ptid_get_tid (ptid);
|
|
|
|
n = snprintf (buf, 1023, "process %d", pid);
|
|
|
|
#if 0 /* NYI */
|
|
tip = procfs_thread_info (pid, tid);
|
|
if (tip != NULL)
|
|
snprintf (&buf[n], 1023, " (state = 0x%02x)", tip->state);
|
|
#endif
|
|
|
|
return buf;
|
|
}
|
|
|
|
/* to_can_run implementation for "target procfs". Note this really
|
|
means "can this target be the default run target", which there can
|
|
be only one, and we make it be "target native" like other ports.
|
|
"target procfs <node>" wouldn't make sense as default run target, as
|
|
it needs <node>. */
|
|
|
|
static int
|
|
procfs_can_run (struct target_ops *self)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/* "target procfs". */
|
|
static struct target_ops nto_procfs_ops;
|
|
|
|
/* "target native". */
|
|
static struct target_ops *nto_native_ops;
|
|
|
|
/* to_open implementation for "target procfs". */
|
|
|
|
static void
|
|
procfs_open (const char *arg, int from_tty)
|
|
{
|
|
procfs_open_1 (&nto_procfs_ops, arg, from_tty);
|
|
}
|
|
|
|
/* to_open implementation for "target native". */
|
|
|
|
static void
|
|
procfs_native_open (const char *arg, int from_tty)
|
|
{
|
|
procfs_open_1 (nto_native_ops, arg, from_tty);
|
|
}
|
|
|
|
/* Create the "native" and "procfs" targets. */
|
|
|
|
static void
|
|
init_procfs_targets (void)
|
|
{
|
|
struct target_ops *t = inf_child_target ();
|
|
|
|
/* Leave to_shortname as "native". */
|
|
t->to_longname = "QNX Neutrino local process";
|
|
t->to_doc = "QNX Neutrino local process (started by the \"run\" command).";
|
|
t->to_open = procfs_native_open;
|
|
t->to_attach = procfs_attach;
|
|
t->to_post_attach = procfs_post_attach;
|
|
t->to_detach = procfs_detach;
|
|
t->to_resume = procfs_resume;
|
|
t->to_wait = procfs_wait;
|
|
t->to_fetch_registers = procfs_fetch_registers;
|
|
t->to_store_registers = procfs_store_registers;
|
|
t->to_xfer_partial = procfs_xfer_partial;
|
|
t->to_files_info = procfs_files_info;
|
|
t->to_insert_breakpoint = procfs_insert_breakpoint;
|
|
t->to_remove_breakpoint = procfs_remove_breakpoint;
|
|
t->to_can_use_hw_breakpoint = procfs_can_use_hw_breakpoint;
|
|
t->to_insert_hw_breakpoint = procfs_insert_hw_breakpoint;
|
|
t->to_remove_hw_breakpoint = procfs_remove_hw_breakpoint;
|
|
t->to_insert_watchpoint = procfs_insert_hw_watchpoint;
|
|
t->to_remove_watchpoint = procfs_remove_hw_watchpoint;
|
|
t->to_stopped_by_watchpoint = procfs_stopped_by_watchpoint;
|
|
t->to_kill = procfs_kill_inferior;
|
|
t->to_create_inferior = procfs_create_inferior;
|
|
t->to_mourn_inferior = procfs_mourn_inferior;
|
|
t->to_pass_signals = procfs_pass_signals;
|
|
t->to_thread_alive = procfs_thread_alive;
|
|
t->to_update_thread_list = procfs_update_thread_list;
|
|
t->to_pid_to_str = procfs_pid_to_str;
|
|
t->to_stop = procfs_stop;
|
|
t->to_have_continuable_watchpoint = 1;
|
|
t->to_extra_thread_info = nto_extra_thread_info;
|
|
|
|
nto_native_ops = t;
|
|
|
|
/* Register "target native". This is the default run target. */
|
|
add_target (t);
|
|
|
|
/* Register "target procfs <node>". */
|
|
nto_procfs_ops = *t;
|
|
nto_procfs_ops.to_shortname = "procfs";
|
|
nto_procfs_ops.to_can_run = procfs_can_run;
|
|
t->to_longname = "QNX Neutrino local or remote process";
|
|
t->to_doc = "QNX Neutrino process. target procfs <node>";
|
|
t->to_open = procfs_open;
|
|
|
|
add_target (&nto_procfs_ops);
|
|
}
|
|
|
|
#define OSTYPE_NTO 1
|
|
|
|
void
|
|
_initialize_procfs (void)
|
|
{
|
|
sigset_t set;
|
|
|
|
init_procfs_targets ();
|
|
|
|
/* We use SIGUSR1 to gain control after we block waiting for a process.
|
|
We use sigwaitevent to wait. */
|
|
sigemptyset (&set);
|
|
sigaddset (&set, SIGUSR1);
|
|
sigprocmask (SIG_BLOCK, &set, NULL);
|
|
|
|
/* Initially, make sure all signals are reported. */
|
|
sigfillset (&run.trace);
|
|
|
|
/* Stuff some information. */
|
|
nto_cpuinfo_flags = SYSPAGE_ENTRY (cpuinfo)->flags;
|
|
nto_cpuinfo_valid = 1;
|
|
|
|
add_info ("pidlist", procfs_pidlist, _("pidlist"));
|
|
add_info ("meminfo", procfs_meminfo, _("memory information"));
|
|
|
|
nto_is_nto_target = procfs_is_nto_target;
|
|
}
|
|
|
|
|
|
static int
|
|
procfs_hw_watchpoint (int addr, int len, int type)
|
|
{
|
|
procfs_break brk;
|
|
|
|
switch (type)
|
|
{
|
|
case 1: /* Read. */
|
|
brk.type = _DEBUG_BREAK_RD;
|
|
break;
|
|
case 2: /* Read/Write. */
|
|
brk.type = _DEBUG_BREAK_RW;
|
|
break;
|
|
default: /* Modify. */
|
|
/* FIXME: brk.type = _DEBUG_BREAK_RWM gives EINVAL for some reason. */
|
|
brk.type = _DEBUG_BREAK_RW;
|
|
}
|
|
brk.type |= _DEBUG_BREAK_HW; /* Always ask for HW. */
|
|
brk.addr = addr;
|
|
brk.size = len;
|
|
|
|
errno = devctl (ctl_fd, DCMD_PROC_BREAK, &brk, sizeof (brk), 0);
|
|
if (errno != EOK)
|
|
{
|
|
perror (_("Failed to set hardware watchpoint"));
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
procfs_can_use_hw_breakpoint (struct target_ops *self,
|
|
int type, int cnt, int othertype)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
static int
|
|
procfs_remove_hw_watchpoint (struct target_ops *self,
|
|
CORE_ADDR addr, int len, int type,
|
|
struct expression *cond)
|
|
{
|
|
return procfs_hw_watchpoint (addr, -1, type);
|
|
}
|
|
|
|
static int
|
|
procfs_insert_hw_watchpoint (struct target_ops *self,
|
|
CORE_ADDR addr, int len, int type,
|
|
struct expression *cond)
|
|
{
|
|
return procfs_hw_watchpoint (addr, len, type);
|
|
}
|
|
|
|
static int
|
|
procfs_stopped_by_watchpoint (struct target_ops *ops)
|
|
{
|
|
return 0;
|
|
}
|