Remove some comments in debug_reg_change_callback

gdb/gdbserver:

2015-08-25  Yao Qi  <yao.qi@linaro.org>

	* linux-aarch64-low.c (debug_reg_change_callback): Remove comments.

diff --git a/gdb/gdbserver/ChangeLog b/gdb/gdbserver/ChangeLog
index d5eb882fbf45fa562e91d939f3c7369c137e0c05..0b7e658b91cc94f4c62265c7e258a4e8c795c69c 100644 (file)
--- a/gdb/gdbserver/ChangeLog
+++ b/gdb/gdbserver/ChangeLog
@@ -1,3 +1,7 @@
+2015-08-25  Yao Qi  <yao.qi@linaro.org>
+
+       * linux-aarch64-low.c (debug_reg_change_callback): Remove comments.
+
 2015-08-25  Yao Qi  <yao.qi@linaro.org>
 
        * linux-aarch64-low.c (debug_reg_change_callback): Re-indent

diff --git a/gdb/gdbserver/linux-aarch64-low.c b/gdb/gdbserver/linux-aarch64-low.c
index 8b59eab62286301e828e785e4c7385d693aa9379..a8c2a24fa5a1c9b7b7cf15ada05b33f54bd64b12 100644 (file)
--- a/gdb/gdbserver/linux-aarch64-low.c
+++ b/gdb/gdbserver/linux-aarch64-low.c
@@ -276,26 +276,6 @@ debug_reg_change_callback (struct lwp_info *lwp, void *ptr)
              && (idx <= (is_watchpoint ? aarch64_num_wp_regs
                          : aarch64_num_bp_regs)));
 
-  /* The following assertion is not right, as there can be changes
-     that have not been made to the hardware debug registers
-     before new changes overwrite the old ones.  This can happen,
-     for instance, when the breakpoint/watchpoint hit one of the
-     threads and the user enters continue; then what happens is:
-     1) all breakpoints/watchpoints are removed for all threads;
-     2) a single step is carried out for the thread that was hit;
-     3) all of the points are inserted again for all threads;
-     4) all threads are resumed.
-     The 2nd step will only affect the one thread in which the
-     bp/wp was hit, which means only that one thread is resumed;
-     remember that the actual updating only happen in
-     aarch64_linux_prepare_to_resume, so other threads remain
-     stopped during the removal and insertion of bp/wp.  Therefore
-     for those threads, the change of insertion of the bp/wp
-     overwrites that of the earlier removals.  (The situation may
-     be different when bp/wp is steppable, or in the non-stop
-     mode.)  */
-  /* gdb_assert (DR_N_HAS_CHANGED (dr_changed, idx) == 0);  */
-
   /* The actual update is done later just before resuming the lwp,
      we just mark that one register pair needs updating.  */
   DR_MARK_N_CHANGED (dr_changed, idx);