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Re: [PATCH 07/11 v5] Introduce get_thread_regcache_for_ptid
- From: Doug Evans <dje at google dot com>
- To: Gary Benson <gbenson at redhat dot com>
- Cc: gdb-patches at sourceware dot org, Pedro Alves <palves at redhat dot com>, Tom Tromey <tromey at redhat dot com>
- Date: Wed, 6 Aug 2014 11:15:29 -0700
- Subject: Re: [PATCH 07/11 v5] Introduce get_thread_regcache_for_ptid
- Authentication-results: sourceware.org; auth=none
- References: <1406888377-25795-1-git-send-email-gbenson at redhat dot com> <1406888377-25795-8-git-send-email-gbenson at redhat dot com>
Gary Benson writes:
> This introduces get_thread_regcache_for_ptid so that we can simplify
> nat/linux-btrace.c. A better long term solution would be unify the
> regcache code, but this is sufficient for now.
>
> gdb/
> 2014-08-01 Tom Tromey <tromey@redhat.com>
> Gary Benson <gbenson@redhat.com>
>
> * common/common-regcache.h: New file.
> * Makefile.in (HFILES_NO_SRCDIR): Add common/common-regcache.h.
> * regcache.c: Include the above.
> (get_thread_regcache_for_ptid): New function.
> * nat/linux-btrace.c: Include common-regcache.h.
> (perf_event_read_bts): Use get_thread_regcache_for_ptid.
>
> gdb/gdbserver/
> 2014-08-01 Tom Tromey <tromey@redhat.com>
> Gary Benson <gbenson@redhat.com>
>
> * regcache.c: Include common-regcache.h.
> (get_thread_regcache_for_ptid): New function.
> [...]
> diff --git a/gdb/common/common-regcache.h b/gdb/common/common-regcache.h
> new file mode 100644
> index 0000000..2ef7cb1
> --- /dev/null
> +++ b/gdb/common/common-regcache.h
> @@ -0,0 +1,28 @@
> +/* Cache and manage the values of registers
> +
> + Copyright (C) 1986-2014 Free Software Foundation, Inc.
> +
> + This file is part of GDB.
> +
> + This program is free software; you can redistribute it and/or modify
> + it under the terms of the GNU General Public License as published by
> + the Free Software Foundation; either version 3 of the License, or
> + (at your option) any later version.
> +
> + This program is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + GNU General Public License for more details.
> +
> + You should have received a copy of the GNU General Public License
> + along with this program. If not, see <http://www.gnu.org/licenses/>. */
> +
> +#ifndef COMMON_REGCACHE_H
> +#define COMMON_REGCACHE_H
> +
> +/* A hack until we have an independent regcache. This must be
> + provided by the user. */
This should still say what the function does,
what the inputs/outputs are, etc.
> +
> +extern struct regcache *get_thread_regcache_for_ptid (ptid_t ptid);
> +
> +#endif /* COMMON_REGCACHE_H */
> diff --git a/gdb/gdbserver/regcache.c b/gdb/gdbserver/regcache.c
> index db9dad9..ec4f6c7 100644
> --- a/gdb/gdbserver/regcache.c
> +++ b/gdb/gdbserver/regcache.c
> @@ -21,6 +21,8 @@
> #include "gdbthread.h"
> #include "tdesc.h"
> #include "rsp-low.h"
> +#include "common-regcache.h"
> +
> #ifndef IN_PROCESS_AGENT
>
> struct regcache *
> @@ -61,6 +63,14 @@ get_thread_regcache (struct thread_info *thread, int fetch)
> return regcache;
> }
>
> +/* See common/linux-btrace.h. */
It's nat/linux-btrace.h, but I think you mean common/common-regcache.h.
[setting aside the #include "common/regcache.h" discussion]
> +
> +struct regcache *
> +get_thread_regcache_for_ptid (ptid_t ptid)
> +{
> + return get_thread_regcache (find_thread_ptid (ptid), 1);
> +}
> +
> void
> regcache_invalidate_thread (struct thread_info *thread)
> {
> diff --git a/gdb/nat/linux-btrace.c b/gdb/nat/linux-btrace.c
> index f6fdbda..b32d04c 100644
> --- a/gdb/nat/linux-btrace.c
> +++ b/gdb/nat/linux-btrace.c
> @@ -30,6 +30,7 @@
> #include "gdbthread.h"
> #include "gdb_wait.h"
> #include "i386-cpuid.h"
> +#include "common-regcache.h"
>
> #ifdef HAVE_SYS_SYSCALL_H
> #include <sys/syscall.h>
> @@ -180,11 +181,7 @@ perf_event_read_bts (struct btrace_target_info* tinfo, const uint8_t *begin,
> gdb_assert (start <= end);
>
> /* The first block ends at the current pc. */
> -#ifdef GDBSERVER
> - regcache = get_thread_regcache (find_thread_ptid (tinfo->ptid), 1);
> -#else
> - regcache = get_thread_regcache (tinfo->ptid);
> -#endif
> + regcache = get_thread_regcache_for_ptid (tinfo->ptid);
> block.end = regcache_read_pc (regcache);
>
> /* The buffer may contain a partial record as its last entry (i.e. when the
> diff --git a/gdb/regcache.c b/gdb/regcache.c
> index f410dc2..2ffc121 100644
> --- a/gdb/regcache.c
> +++ b/gdb/regcache.c
> @@ -28,6 +28,7 @@
> #include "exceptions.h"
> #include "remote.h"
> #include "valprint.h"
> +#include "common-regcache.h"
>
> /*
> * DATA STRUCTURE
> @@ -535,6 +536,13 @@ get_current_regcache (void)
> return get_thread_regcache (inferior_ptid);
> }
>
> +/* See common/linux-btrace.h. */
Similarly, common/common-regcache.h.
> +
> +struct regcache *
> +get_thread_regcache_for_ptid (ptid_t ptid)
> +{
> + return get_thread_regcache (ptid);
> +}
>
> /* Observer for the target_changed event. */
>
> --
> 1.7.1
>
Ok with those nits fixed.