Use readlink unconditionally

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

diff --git a/gdb/thread.c b/gdb/thread.c
index 25538d7d43816c027ee5a5559a45ee6d652458d5..5c94264ad3d803085140b5657722003fb0ac591c 100644 (file)
--- a/gdb/thread.c
+++ b/gdb/thread.c
@@ -68,7 +68,6 @@ 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 prune_threads (void);
 
 /* Data to cleanup thread array.  */
 
@@ -91,26 +90,75 @@ inferior_thread (void)
   return tp;
 }
 
-void
-delete_step_resume_breakpoint (struct thread_info *tp)
+/* Delete the breakpoint pointed at by BP_P, if there's one.  */
+
+static void
+delete_thread_breakpoint (struct breakpoint **bp_p)
 {
-  if (tp && tp->control.step_resume_breakpoint)
+  if (*bp_p != NULL)
     {
-      delete_breakpoint (tp->control.step_resume_breakpoint);
-      tp->control.step_resume_breakpoint = NULL;
+      delete_breakpoint (*bp_p);
+      *bp_p = NULL;
     }
 }
 
+void
+delete_step_resume_breakpoint (struct thread_info *tp)
+{
+  if (tp != NULL)
+    delete_thread_breakpoint (&tp->control.step_resume_breakpoint);
+}
+
 void
 delete_exception_resume_breakpoint (struct thread_info *tp)
 {
-  if (tp && tp->control.exception_resume_breakpoint)
+  if (tp != NULL)
+    delete_thread_breakpoint (&tp->control.exception_resume_breakpoint);
+}
+
+/* See gdbthread.h.  */
+
+void
+delete_single_step_breakpoints (struct thread_info *tp)
+{
+  if (tp != NULL)
+    delete_thread_breakpoint (&tp->control.single_step_breakpoints);
+}
+
+/* Delete the breakpoint pointed at by BP_P at the next stop, if
+   there's one.  */
+
+static void
+delete_at_next_stop (struct breakpoint **bp)
+{
+  if (*bp != NULL)
     {
-      delete_breakpoint (tp->control.exception_resume_breakpoint);
-      tp->control.exception_resume_breakpoint = NULL;
+      (*bp)->disposition = disp_del_at_next_stop;
+      *bp = NULL;
     }
 }
 
+/* See gdbthread.h.  */
+
+int
+thread_has_single_step_breakpoints_set (struct thread_info *tp)
+{
+  return tp->control.single_step_breakpoints != NULL;
+}
+
+/* See gdbthread.h.  */
+
+int
+thread_has_single_step_breakpoint_here (struct thread_info *tp,
+                                       struct address_space *aspace,
+                                       CORE_ADDR addr)
+{
+  struct breakpoint *ss_bps = tp->control.single_step_breakpoints;
+
+  return (ss_bps != NULL
+         && breakpoint_has_location_inserted_here (ss_bps, aspace, addr));
+}
+
 static void
 clear_thread_inferior_resources (struct thread_info *tp)
 {
@@ -118,18 +166,9 @@ clear_thread_inferior_resources (struct thread_info *tp)
      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->control.step_resume_breakpoint)
-    {
-      tp->control.step_resume_breakpoint->disposition = disp_del_at_next_stop;
-      tp->control.step_resume_breakpoint = NULL;
-    }
-
-  if (tp->control.exception_resume_breakpoint)
-    {
-      tp->control.exception_resume_breakpoint->disposition
-       = disp_del_at_next_stop;
-      tp->control.exception_resume_breakpoint = NULL;
-    }
+  delete_at_next_stop (&tp->control.step_resume_breakpoint);
+  delete_at_next_stop (&tp->control.exception_resume_breakpoint);
+  delete_at_next_stop (&tp->control.single_step_breakpoints);
 
   delete_longjmp_breakpoint_at_next_stop (tp->num);
 
@@ -582,7 +621,9 @@ thread_alive (struct thread_info *tp)
   return 1;
 }
 
-static void
+/* See gdbthreads.h.  */
+
+void
 prune_threads (void)
 {
   struct thread_info *tp, *next;
@@ -1546,8 +1587,7 @@ update_threads_executing (void)
 void
 update_thread_list (void)
 {
-  prune_threads ();
-  target_find_new_threads ();
+  target_update_thread_list ();
   update_threads_executing ();
 }