const-fy regcache::m_aspace

regcache::m_aspace is a const, never changed during the lifetime of
regcache object.  The address_space object is a const object too.

gdb:

2017-11-02  Yao Qi  <yao.qi@linaro.org>

	* breakpoint.c (insert_single_step_breakpoints): Update.
	* frame.c (struct frame_info) <aspace>: Add const.
	(frame_save_as_regcache): Add const.
	(get_frame_address_space): Return const address_space *.
	* frame.h (get_frame_address_space): Update declaration.
	* infrun.c (struct step_over_info) <aspace>: Add const.
	(set_step_over_info): Make aspace const.
	(displaced_step_prepare_throw): Change variable const.
	(resume): Likewise.
	(proceed): Likewise.
	(adjust_pc_after_break): Likewise.
	(save_waitstatus): Likewise.
	(handle_signal_stop): Likewise.
	(keep_going_pass_signal): Likewise.
	* jit.c (jit_frame_sniffer): Add const.
	* mips-tdep.c (mips_single_step_through_delay): Likewise.
	* ppc-linux-tdep.c (ppu2spu_sniffer): Likewise.
	* record-full.c (record_full_wait_1): Likewise.
	* regcache.c (regcache::regcache): Change parameter to const.
	* regcache.h (regcache::regcache): Likewise.
	(regcache::aspace): Return const address_space *.
	(regcache) <m_aspace>: Add const.

1 files changed, 2 insertions, 2 deletions

diff --git a/gdb/jit.c b/gdb/jit.c
index a2d1f6d..b70f87c 100644
--- a/gdb/jit.c
+++ b/gdb/jit.c
@@ -1186,7 +1186,6 @@ jit_frame_sniffer (const struct frame_unwind *self,
   struct jit_unwind_private *priv_data;
   struct gdb_unwind_callbacks callbacks;
   struct gdb_reader_funcs *funcs;
-  struct address_space *aspace;
   struct gdbarch *gdbarch;
 
   callbacks.reg_get = jit_unwind_reg_get_impl;
@@ -1200,7 +1199,8 @@ jit_frame_sniffer (const struct frame_unwind *self,
 
   gdb_assert (!*cache);
 
-  aspace = get_frame_address_space (this_frame);
+  const address_space *aspace = get_frame_address_space (this_frame);
+
   gdbarch = get_frame_arch (this_frame);
 
   *cache = XCNEW (struct jit_unwind_private);