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[deliverable/binutils-gdb.git] / gdb / inf-ttrace.c

diff --git a/gdb/inf-ttrace.c b/gdb/inf-ttrace.c
index e9dcda899a49e47027d47c4c490fe4f43f78f828..420133a010351318fbc1e2c9ee43cc3b114c01f9 100644 (file)
--- a/gdb/inf-ttrace.c
+++ b/gdb/inf-ttrace.c
@@ -1,12 +1,12 @@
 /* Low-level child interface to ttrace.
 
-   Copyright (C) 2004, 2005 Free Software Foundation, Inc.
+   Copyright (C) 2004, 2005, 2006, 2007 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 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,
@@ -15,9 +15,7 @@
    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., 51 Franklin Street, Fifth Floor,
-   Boston, MA 02110-1301, USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #include "defs.h"
 
@@ -29,7 +27,6 @@
 #include "gdbcore.h"
 #include "gdbthread.h"
 #include "inferior.h"
-#include "observer.h"
 #include "target.h"
 
 #include "gdb_assert.h"
@@ -79,6 +76,11 @@ struct inf_ttrace_page_dict
   int count;                   /* Number of pages in this dictionary.  */
 } inf_ttrace_page_dict;
 
+struct inf_ttrace_private_thread_info
+{
+  int dying;
+};
+
 /* Number of lwps that are currently in a system call.  */
 static int inf_ttrace_num_lwps_in_syscall;
 
@@ -360,7 +362,7 @@ inf_ttrace_can_use_hw_breakpoint (int type, int len, int ot)
 }
 
 static int
-inf_ttrace_region_size_ok_for_hw_watchpoint (int len)
+inf_ttrace_region_ok_for_hw_watchpoint (CORE_ADDR addr, int len)
 {
   return 1;
 }
@@ -636,12 +638,6 @@ inf_ttrace_create_inferior (char *exec_file, char *allargs, char **env,
 
   fork_inferior (exec_file, allargs, env, inf_ttrace_me, inf_ttrace_him,
                 inf_ttrace_prepare, NULL);
-
-  /* We are at the first instruction we care about.  */
-  observer_notify_inferior_created (&current_target, from_tty);
-
-  /* Pedal to the metal...  */
-  proceed ((CORE_ADDR) -1, TARGET_SIGNAL_0, 0);
 }
 
 static void
@@ -727,10 +723,6 @@ inf_ttrace_attach (char *args, int from_tty)
 
   inferior_ptid = pid_to_ptid (pid);
   push_target (ttrace_ops_hack);
-
-  /* Do this first, before anything has had a chance to query the
-     inferior's symbol table or similar.  */
-  observer_notify_inferior_created (&current_target, from_tty);
 }
 
 static void
@@ -807,6 +799,14 @@ inf_ttrace_resume_callback (struct thread_info *info, void *arg)
   return 0;
 }
 
+static int
+inf_ttrace_delete_dying_threads_callback (struct thread_info *info, void *arg)
+{
+  if (((struct inf_ttrace_private_thread_info *)info->private)->dying == 1)
+    delete_thread (info->ptid);
+  return 0;
+}
+
 static void
 inf_ttrace_resume (ptid_t ptid, int step, enum target_signal signal)
 {
@@ -828,6 +828,7 @@ inf_ttrace_resume (ptid_t ptid, int step, enum target_signal signal)
     {
       /* Let all the other threads run too.  */
       iterate_over_threads (inf_ttrace_resume_callback, NULL);
+      iterate_over_threads (inf_ttrace_delete_dying_threads_callback, NULL);
     }
 }
 
@@ -837,6 +838,7 @@ inf_ttrace_wait (ptid_t ptid, struct target_waitstatus *ourstatus)
   pid_t pid = ptid_get_pid (ptid);
   lwpid_t lwpid = ptid_get_lwp (ptid);
   ttstate_t tts;
+  struct thread_info *ti;
 
   /* Until proven otherwise.  */
   ourstatus->kind = TARGET_WAITKIND_SPURIOUS;
@@ -953,19 +955,31 @@ inf_ttrace_wait (ptid_t ptid, struct target_waitstatus *ourstatus)
        {
          /* Now that we're going to be multi-threaded, add the
             original thread to the list first.  */
-         add_thread (ptid_build (tts.tts_pid, tts.tts_lwpid, 0));
+         ti = add_thread (ptid_build (tts.tts_pid, tts.tts_lwpid, 0));
+         ti->private =
+           xmalloc (sizeof (struct inf_ttrace_private_thread_info));
+         memset (ti->private, 0,
+                 sizeof (struct inf_ttrace_private_thread_info));
          inf_ttrace_num_lwps++;
        }
       printf_filtered (_("[New %s]\n"), target_pid_to_str (ptid));
-      add_thread (ptid);
+      ti = add_thread (ptid);
+      ti->private =
+       xmalloc (sizeof (struct inf_ttrace_private_thread_info));
+      memset (ti->private, 0,
+             sizeof (struct inf_ttrace_private_thread_info));
       inf_ttrace_num_lwps++;
       ptid = ptid_build (tts.tts_pid, tts.tts_lwpid, 0);
       break;
 
     case TTEVT_LWP_EXIT:
       printf_filtered(_("[%s exited]\n"), target_pid_to_str (ptid));
-      delete_thread (ptid);
+      ti = find_thread_pid (ptid);
+      gdb_assert (ti != NULL);
+      ((struct inf_ttrace_private_thread_info *)ti->private)->dying = 1;
       inf_ttrace_num_lwps--;
+      ttrace (TT_LWP_CONTINUE, ptid_get_pid (ptid),
+              ptid_get_lwp (ptid), TT_NOPC, 0, 0);
       /* If we don't return -1 here, core GDB will re-add the thread.  */
       ptid = minus_one_ptid;
       break;
@@ -974,7 +988,9 @@ inf_ttrace_wait (ptid_t ptid, struct target_waitstatus *ourstatus)
       lwpid = tts.tts_u.tts_thread.tts_target_lwpid;
       ptid = ptid_build (tts.tts_pid, lwpid, 0);
       printf_filtered(_("[%s has been terminated]\n"), target_pid_to_str (ptid));
-      delete_thread (ptid);
+      ti = find_thread_pid (ptid);
+      gdb_assert (ti != NULL);
+      ((struct inf_ttrace_private_thread_info *)ti->private)->dying = 1;
       inf_ttrace_num_lwps--;
       ptid = ptid_build (tts.tts_pid, tts.tts_lwpid, 0);
       break;
@@ -1097,7 +1113,9 @@ inf_ttrace_files_info (struct target_ops *ignore)
 static int
 inf_ttrace_thread_alive (ptid_t ptid)
 {
-  return 1;
+  struct thread_info *ti;
+  ti = find_thread_pid (ptid);
+  return !(((struct inf_ttrace_private_thread_info *)ti->private)->dying);
 }
 
 static char *
@@ -1132,8 +1150,8 @@ inf_ttrace_target (void)
   t->to_insert_watchpoint = inf_ttrace_insert_watchpoint;
   t->to_remove_watchpoint = inf_ttrace_remove_watchpoint;
   t->to_stopped_by_watchpoint = inf_ttrace_stopped_by_watchpoint;
-  t->to_region_size_ok_for_hw_watchpoint =
-    inf_ttrace_region_size_ok_for_hw_watchpoint;
+  t->to_region_ok_for_hw_watchpoint =
+    inf_ttrace_region_ok_for_hw_watchpoint;
   t->to_kill = inf_ttrace_kill;
   t->to_create_inferior = inf_ttrace_create_inferior;
   t->to_follow_fork = inf_ttrace_follow_fork;