XCNEW gdbarch_tdep in rl78 and rx

"struct gdbarch_tdep" is XNEW'ed in rl78 and rx, so the memory is not
cleared.  As the result, tdep->rl78_psw_type is never initialized
properly.

  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);

  if (tdep->rl78_psw_type == NULL)
    {
      tdep->rl78_psw_type = arch_flags_type (gdbarch,
					     "builtin_type_rl78_psw", 1);

The bug is found by my unit test in the following patch.

gdb:

2017-04-13  Yao Qi  <yao.qi@linaro.org>

	* rl78-tdep.c (rl78_gdbarch_init): Use XCNEW instead of XNEW.
	* rx-tdep.c (rx_gdbarch_init): Likewise.

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 315932e..58c4b5e 100644 (file)
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,8 @@
+2017-04-13  Yao Qi  <yao.qi@linaro.org>
+
+       * rl78-tdep.c (rl78_gdbarch_init): Use XCNEW instead of XNEW.
+       * rx-tdep.c (rx_gdbarch_init): Likewise.
+
 2017-04-13  Pedro Alves  <palves@redhat.com>
 
        * breakpoint.h (struct breakpoint): Reindent.

diff --git a/gdb/rl78-tdep.c b/gdb/rl78-tdep.c
index 9f2193e..307a760 100644 (file)
--- a/gdb/rl78-tdep.c
+++ b/gdb/rl78-tdep.c
@@ -1412,7 +1412,7 @@ rl78_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
 
   /* None found, create a new architecture from the information
      provided.  */
-  tdep = XNEW (struct gdbarch_tdep);
+  tdep = XCNEW (struct gdbarch_tdep);
   gdbarch = gdbarch_alloc (&info, tdep);
   tdep->elf_flags = elf_flags;
 

diff --git a/gdb/rx-tdep.c b/gdb/rx-tdep.c
index 7b66d6d..1a3d103 100644 (file)
--- a/gdb/rx-tdep.c
+++ b/gdb/rx-tdep.c
@@ -1101,7 +1101,7 @@ rx_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
 
   /* None found, create a new architecture from the information
      provided.  */
-  tdep = XNEW (struct gdbarch_tdep);
+  tdep = XCNEW (struct gdbarch_tdep);
   gdbarch = gdbarch_alloc (&info, tdep);
   tdep->elf_flags = elf_flags;