Updated copyright notices for most files.

[deliverable/binutils-gdb.git] / gdb / thread.c

diff --git a/gdb/thread.c b/gdb/thread.c
index 249f096b057bf40c6b3d0dc606ce05f5776dd293..c4ce6088baed596c0794f2dee6339822389165b4 100644 (file)
--- a/gdb/thread.c
+++ b/gdb/thread.c
@@ -1,7 +1,7 @@
 /* Multi-process/thread control for GDB, the GNU debugger.
 
 /* Multi-process/thread control for GDB, the GNU debugger.
 

-   Copyright 1986, 1987, 1988, 1993, 1994, 1995, 1996, 1997, 1998,
-   1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
+   Copyright (C) 1986, 1987, 1988, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
+   2000, 2001, 2002, 2003, 2004, 2007, 2008 Free Software Foundation, Inc.

 
    Contributed by Lynx Real-Time Systems, Inc.  Los Gatos, CA.
 
 
    Contributed by Lynx Real-Time Systems, Inc.  Los Gatos, CA.
 


@@ -9,7 +9,7 @@
 
    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
 
    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 2 of the License, or
+   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,
    (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,


@@ -18,9 +18,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
    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, write to the Free Software
-   Foundation, Inc., 59 Temple Place - Suite 330,
-   Boston, MA 02111-1307, USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

 
 #include "defs.h"
 #include "symtab.h"
 
 #include "defs.h"
 #include "symtab.h"


@@ -42,8 +40,6 @@
 #include <signal.h>
 #include "ui-out.h"
 
 #include <signal.h>
 #include "ui-out.h"
 

-/*#include "lynxos-core.h" */
-

 /* Definition of struct thread_info exported to gdbthread.h */
 
 /* Prototypes for exported functions. */
 /* Definition of struct thread_info exported to gdbthread.h */
 
 /* Prototypes for exported functions. */


@@ -63,8 +59,9 @@ static int thread_alive (struct thread_info *);
 static void info_threads_command (char *, int);
 static void thread_apply_command (char *, int);
 static void restore_current_thread (ptid_t);
 static void info_threads_command (char *, int);
 static void thread_apply_command (char *, int);
 static void restore_current_thread (ptid_t);

-static void switch_to_thread (ptid_t ptid);

 static void prune_threads (void);
 static void prune_threads (void);

+static struct cleanup *make_cleanup_restore_current_thread (ptid_t,
+                                                            struct frame_id);

 
 void
 delete_step_resume_breakpoint (void *arg)
 
 void
 delete_step_resume_breakpoint (void *arg)


@@ -87,9 +84,11 @@ static void
 free_thread (struct thread_info *tp)
 {
   /* NOTE: this will take care of any left-over step_resume breakpoints,
 free_thread (struct thread_info *tp)
 {
   /* NOTE: this will take care of any left-over step_resume breakpoints,

-     but not any user-specified thread-specific breakpoints. */
+     but not any user-specified thread-specific breakpoints.  We can not
+     delete the breakpoint straight-off, because the inferior might not
+     be stopped at the moment.  */

   if (tp->step_resume_breakpoint)
   if (tp->step_resume_breakpoint)

-    delete_breakpoint (tp->step_resume_breakpoint);
+    tp->step_resume_breakpoint->disposition = disp_del_at_next_stop;

 
   /* FIXME: do I ever need to call the back-end to give it a
      chance at this private data before deleting the thread?  */
 
   /* FIXME: do I ever need to call the back-end to give it a
      chance at this private data before deleting the thread?  */


@@ -284,8 +283,10 @@ do_captured_list_thread_ids (struct ui_out *uiout, void *arg)
 enum gdb_rc
 gdb_list_thread_ids (struct ui_out *uiout, char **error_message)
 {
 enum gdb_rc
 gdb_list_thread_ids (struct ui_out *uiout, char **error_message)
 {

-  return catch_exceptions_with_msg (uiout, do_captured_list_thread_ids, NULL,
-                                   error_message, RETURN_MASK_ALL);
+  if (catch_exceptions_with_msg (uiout, do_captured_list_thread_ids, NULL,
+                                error_message, RETURN_MASK_ALL) < 0)
+    return GDB_RC_FAIL;
+  return GDB_RC_OK;

 }
 
 /* Load infrun state for the thread PID.  */
 }
 
 /* Load infrun state for the thread PID.  */


@@ -299,7 +300,7 @@ load_infrun_state (ptid_t ptid,
                   CORE_ADDR *step_range_end,
                   struct frame_id *step_frame_id,
                   int *handling_longjmp,
                   CORE_ADDR *step_range_end,
                   struct frame_id *step_frame_id,
                   int *handling_longjmp,

-                  int *another_trap,
+                  int *stepping_over_breakpoint,

                   int *stepping_through_solib_after_catch,
                   bpstat *stepping_through_solib_catchpoints,
                   int *current_line,
                   int *stepping_through_solib_after_catch,
                   bpstat *stepping_through_solib_catchpoints,
                   int *current_line,


@@ -320,7 +321,7 @@ load_infrun_state (ptid_t ptid,
   *step_range_end = tp->step_range_end;
   *step_frame_id = tp->step_frame_id;
   *handling_longjmp = tp->handling_longjmp;
   *step_range_end = tp->step_range_end;
   *step_frame_id = tp->step_frame_id;
   *handling_longjmp = tp->handling_longjmp;

-  *another_trap = tp->another_trap;
+  *stepping_over_breakpoint = tp->stepping_over_breakpoint;

   *stepping_through_solib_after_catch =
     tp->stepping_through_solib_after_catch;
   *stepping_through_solib_catchpoints =
   *stepping_through_solib_after_catch =
     tp->stepping_through_solib_after_catch;
   *stepping_through_solib_catchpoints =


@@ -340,7 +341,7 @@ save_infrun_state (ptid_t ptid,
                   CORE_ADDR step_range_end,
                   const struct frame_id *step_frame_id,
                   int handling_longjmp,
                   CORE_ADDR step_range_end,
                   const struct frame_id *step_frame_id,
                   int handling_longjmp,

-                  int another_trap,
+                  int stepping_over_breakpoint,

                   int stepping_through_solib_after_catch,
                   bpstat stepping_through_solib_catchpoints,
                   int current_line,
                   int stepping_through_solib_after_catch,
                   bpstat stepping_through_solib_catchpoints,
                   int current_line,


@@ -361,7 +362,7 @@ save_infrun_state (ptid_t ptid,
   tp->step_range_end = step_range_end;
   tp->step_frame_id = (*step_frame_id);
   tp->handling_longjmp = handling_longjmp;
   tp->step_range_end = step_range_end;
   tp->step_frame_id = (*step_frame_id);
   tp->handling_longjmp = handling_longjmp;

-  tp->another_trap = another_trap;
+  tp->stepping_over_breakpoint = stepping_over_breakpoint;

   tp->stepping_through_solib_after_catch = stepping_through_solib_after_catch;
   tp->stepping_through_solib_catchpoints = stepping_through_solib_catchpoints;
   tp->current_line = current_line;
   tp->stepping_through_solib_after_catch = stepping_through_solib_after_catch;
   tp->stepping_through_solib_catchpoints = stepping_through_solib_catchpoints;
   tp->current_line = current_line;


@@ -408,9 +409,14 @@ info_threads_command (char *arg, int from_tty)
   struct thread_info *tp;
   ptid_t current_ptid;
   struct frame_info *cur_frame;
   struct thread_info *tp;
   ptid_t current_ptid;
   struct frame_info *cur_frame;

-  struct frame_id saved_frame_id = get_frame_id (get_selected_frame (NULL));
+  struct cleanup *old_chain;
+  struct frame_id saved_frame_id;

   char *extra_info;
 
   char *extra_info;
 

+  /* Backup current thread and selected frame.  */
+  saved_frame_id = get_frame_id (get_selected_frame (NULL));
+  old_chain = make_cleanup_restore_current_thread (inferior_ptid, saved_frame_id);
+

   prune_threads ();
   target_find_new_threads ();
   current_ptid = inferior_ptid;
   prune_threads ();
   target_find_new_threads ();
   current_ptid = inferior_ptid;


@@ -427,45 +433,36 @@ info_threads_command (char *arg, int from_tty)
       if (extra_info)
        printf_filtered (" (%s)", extra_info);
       puts_filtered ("  ");
       if (extra_info)
        printf_filtered (" (%s)", extra_info);
       puts_filtered ("  ");

-
+      /* That switch put us at the top of the stack (leaf frame).  */

       switch_to_thread (tp->ptid);
       print_stack_frame (get_selected_frame (NULL), 0, LOCATION);
     }
 
       switch_to_thread (tp->ptid);
       print_stack_frame (get_selected_frame (NULL), 0, LOCATION);
     }
 

-  switch_to_thread (current_ptid);
+  /* Restores the current thread and the frame selected before
+     the "info threads" command.  */
+  do_cleanups (old_chain);

 
 

-  /* Restores the frame set by the user before the "info threads"
-     command.  We have finished the info-threads display by switching
-     back to the current thread.  That switch has put us at the top of
-     the stack (leaf frame).  */
-  cur_frame = frame_find_by_id (saved_frame_id);
-  if (cur_frame == NULL)
+  /*  If case we were not able to find the original frame, print the
+      new selected frame.  */
+  if (frame_find_by_id (saved_frame_id) == NULL)

     {
     {

-      /* Ooops, can't restore, tell user where we are.  */

       warning (_("Couldn't restore frame in current thread, at frame 0"));
       print_stack_frame (get_selected_frame (NULL), 0, LOCATION);
     }
       warning (_("Couldn't restore frame in current thread, at frame 0"));
       print_stack_frame (get_selected_frame (NULL), 0, LOCATION);
     }

-  else
-    {
-      select_frame (cur_frame);
-      /* re-show current frame. */
-      show_stack_frame (cur_frame);
-    }

 }
 
 /* Switch from one thread to another. */
 
 }
 
 /* Switch from one thread to another. */
 

-static void
+void

 switch_to_thread (ptid_t ptid)
 {
   if (ptid_equal (ptid, inferior_ptid))
     return;
 
   inferior_ptid = ptid;
 switch_to_thread (ptid_t ptid)
 {
   if (ptid_equal (ptid, inferior_ptid))
     return;
 
   inferior_ptid = ptid;

-  flush_cached_frames ();
+  reinit_frame_cache ();

   registers_changed ();
   stop_pc = read_pc ();
   registers_changed ();
   stop_pc = read_pc ();

-  select_frame (get_current_frame ());

 }
 
 static void
 }
 
 static void


@@ -474,13 +471,27 @@ restore_current_thread (ptid_t ptid)
   if (!ptid_equal (ptid, inferior_ptid))
     {
       switch_to_thread (ptid);
   if (!ptid_equal (ptid, inferior_ptid))
     {
       switch_to_thread (ptid);

-      print_stack_frame (get_current_frame (), 1, SRC_LINE);
+    }
+}
+
+static void
+restore_selected_frame (struct frame_id a_frame_id)
+{
+  struct frame_info *selected_frame_info = NULL;
+
+  if (frame_id_eq (a_frame_id, null_frame_id))
+    return;        
+
+  if ((selected_frame_info = frame_find_by_id (a_frame_id)) != NULL)
+    {
+      select_frame (selected_frame_info);

     }
 }
 
 struct current_thread_cleanup
 {
   ptid_t inferior_ptid;
     }
 }
 
 struct current_thread_cleanup
 {
   ptid_t inferior_ptid;

+  struct frame_id selected_frame_id;

 };
 
 static void
 };
 
 static void


@@ -488,15 +499,18 @@ do_restore_current_thread_cleanup (void *arg)
 {
   struct current_thread_cleanup *old = arg;
   restore_current_thread (old->inferior_ptid);
 {
   struct current_thread_cleanup *old = arg;
   restore_current_thread (old->inferior_ptid);

+  restore_selected_frame (old->selected_frame_id);

   xfree (old);
 }
 
 static struct cleanup *
   xfree (old);
 }
 
 static struct cleanup *

-make_cleanup_restore_current_thread (ptid_t inferior_ptid)
+make_cleanup_restore_current_thread (ptid_t inferior_ptid, 
+                                     struct frame_id a_frame_id)

 {
   struct current_thread_cleanup *old
     = xmalloc (sizeof (struct current_thread_cleanup));
   old->inferior_ptid = inferior_ptid;
 {
   struct current_thread_cleanup *old
     = xmalloc (sizeof (struct current_thread_cleanup));
   old->inferior_ptid = inferior_ptid;

+  old->selected_frame_id = a_frame_id;

   return make_cleanup (do_restore_current_thread_cleanup, old);
 }
 
   return make_cleanup (do_restore_current_thread_cleanup, old);
 }
 


@@ -516,11 +530,16 @@ thread_apply_all_command (char *cmd, int from_tty)
   struct cleanup *old_chain;
   struct cleanup *saved_cmd_cleanup_chain;
   char *saved_cmd;
   struct cleanup *old_chain;
   struct cleanup *saved_cmd_cleanup_chain;
   char *saved_cmd;

+  struct frame_id saved_frame_id;
+  ptid_t current_ptid;
+  int thread_has_changed = 0;

 
   if (cmd == NULL || *cmd == '\000')
     error (_("Please specify a command following the thread ID list"));
 
   if (cmd == NULL || *cmd == '\000')
     error (_("Please specify a command following the thread ID list"));

-
-  old_chain = make_cleanup_restore_current_thread (inferior_ptid);
+  
+  current_ptid = inferior_ptid;
+  saved_frame_id = get_frame_id (get_selected_frame (NULL));
+  old_chain = make_cleanup_restore_current_thread (inferior_ptid, saved_frame_id);

 
   /* It is safe to update the thread list now, before
      traversing it for "thread apply all".  MVS */
 
   /* It is safe to update the thread list now, before
      traversing it for "thread apply all".  MVS */


@@ -540,8 +559,15 @@ thread_apply_all_command (char *cmd, int from_tty)
        strcpy (cmd, saved_cmd);        /* Restore exact command used previously */
       }
 
        strcpy (cmd, saved_cmd);        /* Restore exact command used previously */
       }
 

+  if (!ptid_equal (current_ptid, inferior_ptid))
+    thread_has_changed = 1;
+

   do_cleanups (saved_cmd_cleanup_chain);
   do_cleanups (old_chain);
   do_cleanups (saved_cmd_cleanup_chain);
   do_cleanups (old_chain);

+  /* Print stack frame only if we changed thread.  */
+  if (thread_has_changed)
+    print_stack_frame (get_current_frame (), 1, SRC_LINE);
+

 }
 
 static void
 }
 
 static void


@@ -552,6 +578,9 @@ thread_apply_command (char *tidlist, int from_tty)
   struct cleanup *old_chain;
   struct cleanup *saved_cmd_cleanup_chain;
   char *saved_cmd;
   struct cleanup *old_chain;
   struct cleanup *saved_cmd_cleanup_chain;
   char *saved_cmd;

+  struct frame_id saved_frame_id;
+  ptid_t current_ptid;
+  int thread_has_changed = 0;

 
   if (tidlist == NULL || *tidlist == '\000')
     error (_("Please specify a thread ID list"));
 
   if (tidlist == NULL || *tidlist == '\000')
     error (_("Please specify a thread ID list"));


@@ -561,7 +590,9 @@ thread_apply_command (char *tidlist, int from_tty)
   if (*cmd == '\000')
     error (_("Please specify a command following the thread ID list"));
 
   if (*cmd == '\000')
     error (_("Please specify a command following the thread ID list"));
 

-  old_chain = make_cleanup_restore_current_thread (inferior_ptid);
+  current_ptid = inferior_ptid;
+  saved_frame_id = get_frame_id (get_selected_frame (NULL));
+  old_chain = make_cleanup_restore_current_thread (inferior_ptid, saved_frame_id);

 
   /* Save a copy of the command in case it is clobbered by
      execute_command */
 
   /* Save a copy of the command in case it is clobbered by
      execute_command */


@@ -613,8 +644,14 @@ thread_apply_command (char *tidlist, int from_tty)
        }
     }
 
        }
     }
 

+  if (!ptid_equal (current_ptid, inferior_ptid))
+    thread_has_changed = 1;
+

   do_cleanups (saved_cmd_cleanup_chain);
   do_cleanups (old_chain);
   do_cleanups (saved_cmd_cleanup_chain);
   do_cleanups (old_chain);

+  /* Print stack frame only if we changed thread.  */
+  if (thread_has_changed)
+    print_stack_frame (get_current_frame (), 1, SRC_LINE);

 }
 
 /* Switch to the specified thread.  Will dispatch off to thread_apply_command
 }
 
 /* Switch to the specified thread.  Will dispatch off to thread_apply_command


@@ -669,8 +706,10 @@ do_captured_thread_select (struct ui_out *uiout, void *tidstr)
 enum gdb_rc
 gdb_thread_select (struct ui_out *uiout, char *tidstr, char **error_message)
 {
 enum gdb_rc
 gdb_thread_select (struct ui_out *uiout, char *tidstr, char **error_message)
 {

-  return catch_exceptions_with_msg (uiout, do_captured_thread_select, tidstr,
-                                   error_message, RETURN_MASK_ALL);
+  if (catch_exceptions_with_msg (uiout, do_captured_thread_select, tidstr,
+                                error_message, RETURN_MASK_ALL) < 0)
+    return GDB_RC_FAIL;
+  return GDB_RC_OK;

 }
 
 /* Commands with a prefix of `thread'.  */
 }
 
 /* Commands with a prefix of `thread'.  */


@@ -682,15 +721,16 @@ _initialize_thread (void)
   static struct cmd_list_element *thread_apply_list = NULL;
 
   add_info ("threads", info_threads_command,
   static struct cmd_list_element *thread_apply_list = NULL;
 
   add_info ("threads", info_threads_command,

-           "IDs of currently known threads.");
+           _("IDs of currently known threads."));

 
 

-  add_prefix_cmd ("thread", class_run, thread_command,
-                 "Use this command to switch between threads.\n\
-The new thread ID must be currently known.", &thread_cmd_list, "thread ", 1, &cmdlist);
+  add_prefix_cmd ("thread", class_run, thread_command, _("\
+Use this command to switch between threads.\n\
+The new thread ID must be currently known."),
+                 &thread_cmd_list, "thread ", 1, &cmdlist);

 
   add_prefix_cmd ("apply", class_run, thread_apply_command,
 
   add_prefix_cmd ("apply", class_run, thread_apply_command,

-                 "Apply a command to a list of threads.",
-                 &thread_apply_list, "apply ", 1, &thread_cmd_list);
+                 _("Apply a command to a list of threads."),
+                 &thread_apply_list, "thread apply ", 1, &thread_cmd_list);

 
   add_cmd ("all", class_run, thread_apply_all_command,
           _("Apply a command to all threads."), &thread_apply_list);
 
   add_cmd ("all", class_run, thread_apply_all_command,
           _("Apply a command to all threads."), &thread_apply_list);