[GDBserver] Don't error in reinsert_raw_breakpoint if bp->inserted

GDBserver steps over a breakpoint while the single step breakpoint
is inserted at the same address, there are two breakpoint objects
using single raw breakpoint, which is inserted (for single step).
When step over is finished, GDBserver reinsert the breakpoint, but
it finds the raw breakpoint is already inserted, and error out
"Breakpoint already inserted at reinsert time."  Even if I change the
order to delete reinsert breakpoints first (which only decreases the
refcount, but leave inserted flag unchanged), the error is still
there.

The fix is to remove the error and return instead.

gdb/gdbserver:

2016-04-25  Yao Qi  <yao.qi@linaro.org>

	* linux-low.c (reinsert_raw_breakpoint): If bp->inserted is true
	return instead of error.

diff --git a/gdb/gdbserver/ChangeLog b/gdb/gdbserver/ChangeLog
index a7ffbf8..323d582 100644 (file)
--- a/gdb/gdbserver/ChangeLog
+++ b/gdb/gdbserver/ChangeLog
@@ -1,3 +1,8 @@
+2016-04-25  Yao Qi  <yao.qi@linaro.org>
+
+       * linux-low.c (reinsert_raw_breakpoint): If bp->inserted is true
+       return instead of error.
+
 2016-04-22  Yao Qi  <yao.qi@linaro.org>
 
        * linux-aarch32-low.c (arm_store_gregset): Clear CPSR bits 20

diff --git a/gdb/gdbserver/mem-break.c b/gdb/gdbserver/mem-break.c
index 419db9e..363d7ca 100644 (file)
--- a/gdb/gdbserver/mem-break.c
+++ b/gdb/gdbserver/mem-break.c
@@ -1515,7 +1515,7 @@ reinsert_raw_breakpoint (struct raw_breakpoint *bp)
   int err;
 
   if (bp->inserted)
-    error ("Breakpoint already inserted at reinsert time.");
+    return;
 
   err = the_target->insert_point (bp->raw_type, bp->pc, bp->kind, bp);
   if (err == 0)