Wed May 21 16:03:25 1997 Michael Snyder <msnyder@cleaver.cygnus.com>

        * procfs.c (init_procinfo): new function, abstracts some code
        shared by create_procinfo and do_attach;
        (procfs_set_inferior_syscall_traps): new function, abstracts
        some code needed by procfs_init_inferior, do_attach, and
        procfs_lwp_creation_handler; (procfs_first_available): new
        function, find any LWP that's runnable; (procfs_thread_alive):
        replace stub function with real implementation;
        (procfs_lwp_creation_handler): fix bug starting new child
        threads; (info_proc): bug fixes and enhancements for the
        "INFO PROCESSES" command; (close_procinfo_file): call new
        function "delete_thread" to cleanup GDB's thread database;
        (proc_init_failed): add new argument "kill", to control whether
        process is killed (so this function can be shared by
        create_procinfo and do_attach); (procfs_exit_handler): handle
        exit from an attached process, and cleanup procinfo handles
        when the process exits; (procfs_resume, procfs_wait): cleanup
        after a thread when it exits; (do_attach, do_detach): handle
        attached processes with multiple threads; plus some general
        improvements in the diagnostic output.
        * sol-thread.c (sol_thread_alive): replace stub with real
        implementation; (thread_to_lwp, lwp_to_thread): enhance to
        handle threads that may have exited; (sol_thread_attach): add
        startup setup stuff; (sol_thread_detach): add unpush_target
        call; (sol_thread_mourn_inferior): add unpush_target call;
        (sol_thread_wait, sol_thread_resume): enhance to deal with
        thread exit cleanly; (sol_thread_new_objfile,
        sol_thread_pid_to_str): detect unsuccessful startup and
        don't crash; plus some general cleanup.
        * thread.c (delete_thread): new function, allows targets to
        notify gdb when a thread is no longer valid.
        * infrun.c (wait_for_inferior): don't try to detect a new
        thread on receiving a TARGET_EXITED event.

1 files changed, 29 insertions, 1 deletions

diff --git a/gdb/thread.c b/gdb/thread.c
index 7ffc65a..b8bf9e1 100644
--- a/gdb/thread.c
+++ b/gdb/thread.c
@@ -125,6 +125,31 @@ add_thread (pid)
   thread_list = tp;
 }
 
+void
+delete_thread (pid)
+     int pid;
+{
+  struct thread_info *tp, *tpprev;
+
+  tpprev = NULL;
+
+  for (tp = thread_list; tp; tpprev = tp, tp = tp->next)
+    if (tp->pid == pid)
+      break;
+
+  if (!tp)
+    return;
+
+  if (tpprev)
+    tpprev->next = tp->next;
+  else
+    thread_list = tp->next;
+
+  free (tp);
+
+  return;
+}
+
 static struct thread_info *
 find_thread_id (num)
     int num;
@@ -332,7 +357,10 @@ info_threads_command (arg, from_tty)
       printf_filtered ("%d %s  ", tp->num, target_pid_to_str (tp->pid));
 
       switch_to_thread (tp->pid);
-      print_stack_frame (selected_frame, -1, 0);
+      if (selected_frame)
+	print_stack_frame (selected_frame, -1, 0);
+      else
+	printf_filtered ("[No stack.]\n");
     }
 
   switch_to_thread (current_pid);