Re: [PATCH 09/16] btrace, linux: add linux native btrace target ops

[Jan Kratochvil <jan dot kratochvil at redhat dot com>]

On Wed, 23 May 2012 13:22:24 +0200, markus.t.metzger@intel.com wrote:
> diff --git a/gdb/linux-nat-btrace.c b/gdb/linux-nat-btrace.c
> new file mode 100644
> index 0000000..f69fc6f
> --- /dev/null
> +++ b/gdb/linux-nat-btrace.c
> @@ -0,0 +1,86 @@
> +/* Branch trace support for GDB, the GNU debugger.
> +
> +   Copyright (C) 2012 Free Software Foundation, Inc.
> +
> +   Contributed by Intel Corp. <markus.t.metzger@intel.com>.
> +
> +   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/>.  */
> +
> +#include "linux-nat-btrace.h"
> +#include "linux-btrace.h"
> +#include "btrace.h"
> +#include "target.h"
> +#include "gdbarch.h"
> +#include "arch-utils.h"
> +#include <errno.h>
> +
> +static int
> +linux_nat_push_btrace_record (struct linux_btrace_block *raw, void *arg)
> +{
> +  VEC (btrace_block_s) **btrace = arg;
> +  struct btrace_block *block;
> +
> +  if (!raw)
> +    return EINVAL;
> +
> +  if (!btrace)
> +    return EINVAL;

I did not check now but probably excessive.

> +
> +  block = VEC_safe_push (btrace_block_s, *btrace, NULL);
> +  if (!block)
> +      return ENOMEM;

Incorrect indentation.

> +
> +  block->begin = raw->begin;
> +  block->end   = raw->end;

Do not use alignment/indentation.


> +
> +  return 0;
> +}
> +
> +static VEC (btrace_block_s) *
> +linux_nat_read_btrace (struct btrace_target_info *tinfo)
> +{
> +  VEC (btrace_block_s) *btrace = NULL;
> +  int errcode;
> +
> +  if (!tinfo)
> +    {
> +      errno = EINVAL;
> +      return NULL;
> +    }
> +  if (!tinfo->ptr_bits)
> +    {
> +      struct gdbarch *gdbarch = get_current_arch ();

Empty line.

> +      if (gdbarch)
> +        tinfo->ptr_bits = gdbarch_ptr_bit (gdbarch);
> +    }
> +
> +  errcode = linux_read_btrace (tinfo, linux_nat_push_btrace_record, &btrace);
> +  if (errcode)
> +    warning (_("error while reading branch trace data: %s. "

Captitalize "Error".  Use two spaces at the end.


> +               "trace might be incomplete."), safe_strerror (errcode));
> +
> +  return btrace;
> +}
> +
> +void
> +linux_nat_add_btrace_ops (struct target_ops *t)
> +{
> +  t->to_supports_btrace = linux_supports_btrace;
> +  t->to_enable_btrace = linux_enable_btrace;
> +  t->to_disable_btrace = linux_disable_btrace;
> +  t->to_btrace_has_changed = linux_btrace_has_changed;
> +  t->to_read_btrace = linux_nat_read_btrace;
> +}
> diff --git a/gdb/linux-nat-btrace.h b/gdb/linux-nat-btrace.h
> new file mode 100644
> index 0000000..cbe9c89
> --- /dev/null
> +++ b/gdb/linux-nat-btrace.h
> @@ -0,0 +1,28 @@
> +/* Branch trace support for GDB, the GNU debugger.
> +
> +   Copyright (C) 2012 Free Software Foundation, Inc.
> +
> +   Contributed by Intel Corp. <markus.t.metzger@intel.com>.
> +
> +   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 LINUX_NAT_BTRACE_H
> +#define LINUX_NAT_BTRACE_H
> +
> +struct target_ops;
> +extern void linux_nat_add_btrace_ops (struct target_ops *);
> +
> +#endif /* LINUX_NAT_BTRACE_H */
> -- 
> 1.7.1


Thanks,
Jan