diff mbox

[v4,06/11] s390: if -> gdb_assert for tdesc_has_registers check

Message ID 20180109120144.93854-7-prudo@linux.vnet.ibm.com
State New, archived
Headers

Commit Message

Philipp Rudo Jan. 9, 2018, 12:01 p.m. UTC 
  Before doing the tdesc validation there is a check whether the tdesc has
registers or not.  This check is not only unnecessary but wrong.

First the check is done after a default tdesc is assigned if the original
tdesc has no registers.  These default tdescs always have registers so the
check alway returns true.

Second if the default tdesc would not have registers the check only skips
the tdesc validation instead of returning an error.  This would trigger a
gdb_assert later on in tdesc_use_registers.

gdb/ChangeLog:

	* s390-linux-tdep.c (s390_gdbarch_init): Use gdb_assert for
	tdesc_has_registers check
---
 gdb/s390-linux-tdep.c | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)
diff mbox

Patch

diff --git a/gdb/s390-linux-tdep.c b/gdb/s390-linux-tdep.c
index b70688b7ff..a4f64a37e9 100644
--- a/gdb/s390-linux-tdep.c
+++ b/gdb/s390-linux-tdep.c
@@ -8046,15 +8046,13 @@  s390_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
   tdep->tdesc = tdesc;
 
   /* Check any target description for validity.  */
-  if (tdesc_has_registers (tdesc))
+  gdb_assert (tdesc_has_registers (tdep->tdesc));
+  if (!s390_tdesc_valid (tdep, tdesc_data))
     {
-      if (!s390_tdesc_valid (tdep, tdesc_data))
-	{
-	  tdesc_data_cleanup (tdesc_data);
-	  xfree (tdep);
-	  gdbarch_free (gdbarch);
-	  return NULL;
-	}
+      tdesc_data_cleanup (tdesc_data);
+      xfree (tdep);
+      gdbarch_free (gdbarch);
+      return NULL;
     }
 
   /* Determine vector ABI.  */