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Date: Wed, 18 Mar 2009 13:54:00 -0000
Message-ID: <daef60380903180614h147089edq48180642e9e7d857@mail.gmail.com>
Subject: Re: [RFA] Submit process record and replay third time, 3/9
From: teawater <teawater@gmail.com>
To: Pedro Alves <pedro@codesourcery.com>
Cc: gdb-patches@sourceware.org, Marc Khouzam <marc.khouzam@ericsson.com>,  	Michael Snyder <msnyder@vmware.com>
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This is the patches updated follow cvs head.

Thanks,
Hui

On Wed, Mar 18, 2009 at 21:11, teawater <teawater@gmail.com> wrote:
> Hi Pedro,
>
> I make a new patch according to your mail.
> Please help me review it.
>
> Thanks,
> Hui
>
> On Tue, Mar 10, 2009 at 04:34, Pedro Alves <pedro@codesourcery.com> wrote:
>> On Monday 23 February 2009 09:20:13, teawater wrote:
>>> This is the new version patches that follow cvs-head.
>>
>> Thanks.
>>
>>>
>>> =A0gdb/Makefile.in | =A0 =A04
>>> =A0gdb/record.c =A0 =A0| 1283 +++++++++++++++++++++++++++++++++++++++++=
+++++++++++++++
>>> =A0gdb/record.h =A0 =A0| =A0 87 +++
>>> =A03 files changed, 1372 insertions(+), 2 deletions(-)
>>>
>>> Index: src/gdb/Makefile.in
>>> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
>>> --- src.orig/gdb/Makefile.in =A02009-02-21 15:53:27.000000000 +0000
>>> +++ src/gdb/Makefile.in =A0 =A0 =A0 2009-02-28 20:23:20.000000000 +0000
>>> @@ -662,7 +662,7 @@ SFILES =3D ada-exp.y ada-lang.c ada-typepr
>>> =A0 =A0 =A0 valarith.c valops.c valprint.c value.c varobj.c vec.c \
>>> =A0 =A0 =A0 wrapper.c \
>>> =A0 =A0 =A0 xml-tdesc.c xml-support.c \
>>> - =A0 =A0 inferior.c
>>> + =A0 =A0 inferior.c record.c
>>>
>>> =A0LINTFILES =3D $(SFILES) $(YYFILES) $(CONFIG_SRCS) init.c
>>>
>>> @@ -813,7 +813,7 @@ COMMON_OBS =3D $(DEPFILES) $(CONFIG_OBS) $
>>> =A0 =A0 =A0 solib.o solib-null.o \
>>> =A0 =A0 =A0 prologue-value.o memory-map.o xml-support.o \
>>> =A0 =A0 =A0 target-descriptions.o target-memory.o xml-tdesc.o xml-built=
in.o \
>>> - =A0 =A0 inferior.o osdata.o
>>> + =A0 =A0 inferior.o osdata.o record.o
>>>
>>> =A0TSOBS =3D inflow.o
>>>
>>> Index: src/gdb/record.c
>>> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
>>> --- /dev/null 1970-01-01 00:00:00.000000000 +0000
>>> +++ src/gdb/record.c =A02009-02-28 20:23:20.000000000 +0000
>>> @@ -0,0 +1,1283 @@
>>> +/* Process record and replay target for GDB, the GNU debugger.
>>> +
>>> + =A0 Copyright (C) 2008 Free Software Foundation, Inc.
>>
>> Oops, you'll have to update this.
>>
>>> +
>>> + =A0 This file is part of GDB.
>>> +
>>> + =A0 This program is free software; you can redistribute it and/or mod=
ify
>>> + =A0 it under the terms of the GNU General Public License as published=
 by
>>> + =A0 the Free Software Foundation; either version 3 of the License, or
>>> + =A0 (at your option) any later version.
>>> +
>>> + =A0 This program is distributed in the hope that it will be useful,
>>> + =A0 but WITHOUT ANY WARRANTY; without even the implied warranty of
>>> + =A0 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. =A0See the
>>> + =A0 GNU General Public License for more details.
>>> +
>>> + =A0 You should have received a copy of the GNU General Public License
>>> + =A0 along with this program. =A0If not, see <http://www.gnu.org/licen=
ses/>. =A0*/
>>> +
>>> +#include "defs.h"
>>> +#include "target.h"
>>> +#include "gdbcmd.h"
>>> +#include "regcache.h"
>>> +#include "inferior.h"
>>> +#include "gdbthread.h"
>>> +#include "event-top.h"
>>> +#include "annotate.h"
>>> +#include "observer.h"
>>> +#include "record.h"
>>
>> Why did you need annotate.h? =A0Can you check which headers are
>> really needed here?
>>
>>> +
>>> +#include <signal.h>
>>> +
>>> +#define DEFAULT_RECORD_INSN_MAX_NUM =A0200000
>>> +
>>> +int record_debug =3D 0;
>>> +
>>> +record_t record_first;
>>> +record_t *record_list =3D &record_first;
>>> +record_t *record_arch_list_head =3D NULL;
>>> +record_t *record_arch_list_tail =3D NULL;
>>> +struct regcache *record_regcache =3D NULL;
>>> +
>>> +/* 1 ask user. 0 auto delete the last record_t. =A0*/
>> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 ^ double-space please.
>>
>>> +static int record_stop_at_limit =3D 1;
>>> +static int record_insn_max_num =3D DEFAULT_RECORD_INSN_MAX_NUM;
>>> +static int record_insn_num =3D 0;
>>> +
>>> +struct target_ops record_ops;
>>> +static int record_resume_step =3D 0;
>>> +static enum target_signal record_resume_siggnal;
>>> +static int record_get_sig =3D 0;
>>> +static sigset_t record_maskall;
>>> +static int record_gdb_operation_disable =3D 0;
>>> +int record_will_store_registers =3D 0;
>>
>> You've got a bunch of magic variables here. =A0Could you
>> add some comments explaining what they're for?
>>
>>> +
>>> +extern struct bp_location *bp_location_chain;
>>
>> This is not right. =A0You're accessing a breakpoints.c
>> internal implementation detail. =A0We need to come up with interfaces
>> to replace this hack.
>>
>>> +
>>> +/* The beneath function pointers. =A0*/
>>> +static struct target_ops *record_beneath_to_resume_ops =3D NULL;
>>> +static void (*record_beneath_to_resume) (struct target_ops *, ptid_t, =
int,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =
=A0 =A0 =A0 enum target_signal) =3D NULL;
>>> +static struct target_ops *record_beneath_to_wait_ops =3D NULL;
>>> +static ptid_t (*record_beneath_to_wait) (struct target_ops *, ptid_t,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =
=A0 =A0struct target_waitstatus *) =3D NULL;
>>> +static struct target_ops *record_beneath_to_store_registers_ops =3D NU=
LL;
>>> +static void (*record_beneath_to_store_registers) (struct target_ops *,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =
=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0struct regcache *,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =
=A0 =A0 =A0 =A0 =A0 =A0 int regno) =3D NULL;
>>> +static struct target_ops *record_beneath_to_xfer_partial_ops =3D NULL;
>>> +static LONGEST (*record_beneath_to_xfer_partial) (struct target_ops * =
ops,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =
=A0 =A0 =A0 =A0 =A0 =A0 enum target_object object,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =
=A0 =A0 =A0 =A0 =A0 =A0 const char *annex,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =
=A0 =A0 =A0 =A0 =A0 =A0 gdb_byte * readbuf,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =
=A0 =A0 =A0 =A0 =A0 =A0 const gdb_byte * writebuf,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =
=A0 =A0 =A0 =A0 =A0 =A0 ULONGEST offset,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =
=A0 =A0 =A0 =A0 =A0 =A0 LONGEST len) =3D NULL;
>>> +static int (*record_beneath_to_insert_breakpoint) (struct bp_target_in=
fo *) =3D
>>> + =A0NULL;
>>> +static int (*record_beneath_to_remove_breakpoint) (struct bp_target_in=
fo *) =3D
>>> + =A0NULL;
>>
>> I can't say I'm happy with this mechanism yet, but it is much
>> better than the previous version of making target.c aware of record.c's =
callbacks.
>>
>>
>>> +
>>> +static void
>>> +record_list_release (record_t * rec)
>>
>> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0^ no =
space after *, please.
>>
>>> +{
>>> + =A0record_t *tmp;
>>> +
>>> + =A0if (!rec)
>>> + =A0 =A0return;
>>> +
>>> + =A0while (rec->next)
>>> + =A0 =A0{
>>> + =A0 =A0 =A0rec =3D rec->next;
>>> + =A0 =A0}
>>> +
>>> + =A0while (rec->prev)
>>> + =A0 =A0{
>>> + =A0 =A0 =A0tmp =3D rec;
>>> + =A0 =A0 =A0rec =3D rec->prev;
>>> + =A0 =A0 =A0if (tmp->type =3D=3D record_reg)
>>> + =A0 =A0 xfree (tmp->u.reg.val);
>>> + =A0 =A0 =A0else if (tmp->type =3D=3D record_mem)
>>> + =A0 =A0 xfree (tmp->u.mem.val);
>>> + =A0 =A0 =A0xfree (tmp);
>>> + =A0 =A0}
>>> +
>>> + =A0if (rec !=3D &record_first)
>>> + =A0 =A0xfree (rec);
>>> +}
>>> +
>>> +static void
>>> +record_list_release_next (void)
>>> +{
>>> + =A0record_t *rec =3D record_list;
>>> + =A0record_t *tmp =3D rec->next;
>>> + =A0rec->next =3D NULL;
>>> + =A0while (tmp)
>>> + =A0 =A0{
>>> + =A0 =A0 =A0rec =3D tmp->next;
>>> + =A0 =A0 =A0if (tmp->type =3D=3D record_reg)
>>> + =A0 =A0 record_insn_num--;
>>> + =A0 =A0 =A0else if (tmp->type =3D=3D record_reg)
>>> + =A0 =A0 xfree (tmp->u.reg.val);
>>> + =A0 =A0 =A0else if (tmp->type =3D=3D record_mem)
>>> + =A0 =A0 xfree (tmp->u.mem.val);
>>> + =A0 =A0 =A0xfree (tmp);
>>> + =A0 =A0 =A0tmp =3D rec;
>>> + =A0 =A0}
>>> +}
>>> +
>>> +static void
>>> +record_list_release_first (void)
>>> +{
>>> + =A0record_t *tmp =3D NULL;
>>> + =A0enum record_type type;
>>> +
>>> + =A0if (!record_first.next)
>>> + =A0 =A0return;
>>> +
>>> + =A0while (1)
>>> + =A0 =A0{
>>> + =A0 =A0 =A0type =3D record_first.next->type;
>>> +
>>> + =A0 =A0 =A0if (type =3D=3D record_reg)
>>> + =A0 =A0 xfree (record_first.next->u.reg.val);
>>> + =A0 =A0 =A0else if (type =3D=3D record_mem)
>>> + =A0 =A0 xfree (record_first.next->u.mem.val);
>>> + =A0 =A0 =A0tmp =3D record_first.next;
>>> + =A0 =A0 =A0record_first.next =3D tmp->next;
>>> + =A0 =A0 =A0xfree (tmp);
>>> +
>>> + =A0 =A0 =A0if (!record_first.next)
>>> + =A0 =A0 {
>>> + =A0 =A0 =A0 gdb_assert (record_insn_num =3D=3D 1);
>>> + =A0 =A0 =A0 break;
>>> + =A0 =A0 }
>>> +
>>> + =A0 =A0 =A0record_first.next->prev =3D &record_first;
>>> +
>>> + =A0 =A0 =A0if (type =3D=3D record_end)
>>> + =A0 =A0 break;
>>> + =A0 =A0}
>>> +
>>> + =A0record_insn_num--;
>>> +}
>>> +
>>> +/* Add a record_t to record_arch_list. =A0*/
>>> +static void
>>> +record_arch_list_add (record_t * rec)
>>> +{
>>> + =A0if (record_debug > 1)
>>> + =A0 =A0fprintf_unfiltered (gdb_stdlog,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 "Process record: record_arch_=
list_add %s.\n",
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 host_address_to_string (rec));
>>> +
>>> + =A0if (record_arch_list_tail)
>>> + =A0 =A0{
>>> + =A0 =A0 =A0record_arch_list_tail->next =3D rec;
>>> + =A0 =A0 =A0rec->prev =3D record_arch_list_tail;
>>> + =A0 =A0 =A0record_arch_list_tail =3D rec;
>>> + =A0 =A0}
>>> + =A0else
>>> + =A0 =A0{
>>> + =A0 =A0 =A0record_arch_list_head =3D rec;
>>> + =A0 =A0 =A0record_arch_list_tail =3D rec;
>>> + =A0 =A0}
>>> +}
>>> +
>>> +/* Record the value of a register ("num") to record_arch_list. =A0*/
>>
>> When we want to mention the value of a parameter, we mentions it in
>> uppercase, like so:
>>
>> /* Record the value of register NUM to record_arch_list. =A0*/
>>
>> Also, there should be an empty line between the comment and
>> the function itself. =A0Here and elsewhere.
>>
>>> +int
>>> +record_arch_list_add_reg (int num)
>>> +{
>>> + =A0record_t *rec;
>>> +
>>> + =A0if (record_debug > 1)
>>> + =A0 =A0fprintf_unfiltered (gdb_stdlog,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 "Process record: add register=
 num =3D %d to "
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 "record list.\n",
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 num);
>>> +
>>> + =A0rec =3D (record_t *) xmalloc (sizeof (record_t));
>>> + =A0rec->u.reg.val =3D (gdb_byte *) xmalloc (MAX_REGISTER_SIZE);
>>> + =A0rec->prev =3D NULL;
>>> + =A0rec->next =3D NULL;
>>> + =A0rec->type =3D record_reg;
>>> + =A0rec->u.reg.num =3D num;
>>> +
>>> + =A0regcache_raw_read (record_regcache, num, rec->u.reg.val);
>>> +
>>> + =A0record_arch_list_add (rec);
>>> +
>>> + =A0return 0;
>>> +}
>>> +
>>> +/* Record the value of a region of memory whose address is "addr" and
>>> + =A0 length is "len" to record_arch_list. =A0*/
>>
>> /* Record the value of a region of memory whose address is ADDR and
>> =A0 length is LEN to record_arch_list. =A0*/
>>
>>> +
>>> +int
>>> +record_arch_list_add_mem (CORE_ADDR addr, int len)
>>> +{
>>> + =A0record_t *rec;
>>> +
>>> + =A0if (record_debug > 1)
>>> + =A0 =A0fprintf_unfiltered (gdb_stdlog,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 "Process record: add mem addr=
 =3D 0x%s len =3D %d to "
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 "record list.\n",
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 paddr_nz (addr), len);
>>> +
>>
>>> + =A0if (!addr)
>>> + =A0 =A0return 0;
>>
>> Why is this check for addr =3D=3D 0 necessary here?
>>
>>> +
>>> + =A0rec =3D (record_t *) xmalloc (sizeof (record_t));
>>> + =A0rec->u.mem.val =3D (gdb_byte *) xmalloc (len);
>>> + =A0rec->prev =3D NULL;
>>> + =A0rec->next =3D NULL;
>>> + =A0rec->type =3D record_mem;
>>> + =A0rec->u.mem.addr =3D addr;
>>> + =A0rec->u.mem.len =3D len;
>>> +
>>> + =A0if (target_read_memory (addr, rec->u.mem.val, len))
>>> + =A0 =A0{
>>> + =A0 =A0 =A0if (record_debug)
>>> + =A0 =A0 fprintf_unfiltered (gdb_stdlog,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 "Process record: erro=
r reading memory at "
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 "addr =3D 0x%s len =
=3D %d.\n",
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 paddr_nz (addr), len);
>>> + =A0 =A0 =A0xfree (rec->u.mem.val);
>>> + =A0 =A0 =A0xfree (rec);
>>> + =A0 =A0 =A0return -1;
>>> + =A0 =A0}
>>> +
>>> + =A0record_arch_list_add (rec);
>>> +
>>> + =A0return 0;
>>> +}
>>> +
>>> +/* Add a record_end type record_t to record_arch_list. =A0*/
>>> +int
>>> +record_arch_list_add_end (int need_dasm)
>>> +{
>>> + =A0record_t *rec;
>>> +
>>> + =A0if (record_debug > 1)
>>> + =A0 =A0fprintf_unfiltered (gdb_stdlog,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 "Process record: add end need=
_dasm =3D %d to "
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 "arch list.\n",
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 need_dasm);
>>> +
>>> + =A0rec =3D (record_t *) xmalloc (sizeof (record_t));
>>> + =A0rec->prev =3D NULL;
>>> + =A0rec->next =3D NULL;
>>> + =A0rec->type =3D record_end;
>>> +
>>> + =A0rec->u.need_dasm =3D need_dasm;
>>> +
>>> + =A0record_arch_list_add (rec);
>>> +
>>> + =A0return 0;
>>> +}
>>> +
>>> +static void
>>> +record_check_insn_num (int set_terminal)
>>> +{
>>> + =A0if (record_insn_max_num)
>>> + =A0 =A0{
>>> + =A0 =A0 =A0gdb_assert (record_insn_num <=3D record_insn_max_num);
>>> + =A0 =A0 =A0if (record_insn_num =3D=3D record_insn_max_num)
>>> + =A0 =A0 {
>>> + =A0 =A0 =A0 /* Ask user what to do. =A0*/
>>> + =A0 =A0 =A0 if (record_stop_at_limit)
>>> + =A0 =A0 =A0 =A0 {
>>> + =A0 =A0 =A0 =A0 =A0 int q;
>>> + =A0 =A0 =A0 =A0 =A0 if (set_terminal)
>>> + =A0 =A0 =A0 =A0 =A0 =A0 target_terminal_ours ();
>>> + =A0 =A0 =A0 =A0 =A0 q =3D yquery (_("Do you want to auto delete previ=
ous execution "
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 "log entries when rec=
ord/replay buffer becomes "
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 "full (record-stop-at=
-limit)?"));
>>> + =A0 =A0 =A0 =A0 =A0 if (set_terminal)
>>> + =A0 =A0 =A0 =A0 =A0 =A0 target_terminal_inferior ();
>>> + =A0 =A0 =A0 =A0 =A0 if (q)
>>> + =A0 =A0 =A0 =A0 =A0 =A0 record_stop_at_limit =3D 0;
>>> + =A0 =A0 =A0 =A0 =A0 else
>>> + =A0 =A0 =A0 =A0 =A0 =A0 error (_("Process record: inferior program st=
opped."));
>>> + =A0 =A0 =A0 =A0 }
>>> + =A0 =A0 }
>>> + =A0 =A0}
>>> +}
>>> +
>>> +static void
>>> +record_normal_stop (void)
>>> +{
>>> + =A0finish_thread_state (minus_one_ptid);
>>> +
>>> + =A0if (!breakpoints_always_inserted_mode () && target_has_execution)
>>> + =A0 =A0remove_breakpoints ();
>>> +
>>> + =A0target_terminal_ours ();
>>> +
>>> + =A0if (target_has_stack && !stop_stack_dummy)
>>> + =A0 =A0set_current_sal_from_frame (get_current_frame (), 1);
>>> +
>>> + =A0select_frame (get_current_frame ());
>>> +
>>> + =A0annotate_stopped ();
>>> + =A0if (!suppress_stop_observer)
>>> + =A0 =A0{
>>> + =A0 =A0 =A0if (!ptid_equal (inferior_ptid, null_ptid))
>>> + =A0 =A0 observer_notify_normal_stop (inferior_thread ()->stop_bpstat,=
 0);
>>> + =A0 =A0 =A0else
>>> + =A0 =A0 observer_notify_normal_stop (NULL, 0);
>>> + =A0 =A0}
>>> +}
>>
>> Nope sorry, this is worse than before. =A0When I asked to not call
>> normal_stop, I didn't mean that you should inline chunks of
>> it here. =A0This is papering over a different problem. =A0Why
>> is it that record.c needs to do this, while other targets do not?
>> If we need to do something like this, it should be needed by all
>> targets that can throw from target_wait (which, is documented
>> as something you shouldn't do anyway). =A0Actually, do you still need
>> any of this in current head?
>>
>>> +
>>> +/* Before inferior step (when GDB record the running message, inferior
>>> + =A0 only can step), GDB will call this function to record the values =
to
>>> + =A0 record_list. =A0This function will call gdbarch_process_record to
>>> + =A0 record the running message of inferior and set them to
>>> + =A0 record_arch_list, and add it to record_list. =A0*/
>>> +
>>> +static void
>>> +record_message_cleanups (void *ignore)
>>> +{
>>> + =A0record_list_release (record_arch_list_tail);
>>> + =A0set_executing (inferior_ptid, 0);
>>> + =A0record_normal_stop ();
>>> +}
>>
>> Same as above. =A0This isn't a record.c problem.
>>
>>> +
>>> +void
>>> +record_message (struct gdbarch *gdbarch)
>>> +{
>>> + =A0int ret;
>>> + =A0struct cleanup *old_cleanups =3D make_cleanup (record_message_clea=
nups, 0);
>>> +
>>> + =A0record_arch_list_head =3D NULL;
>>> + =A0record_arch_list_tail =3D NULL;
>>> +
>>> + =A0/* Check record_insn_num. =A0*/
>>> + =A0record_check_insn_num (1);
>>> +
>>> + =A0record_regcache =3D get_current_regcache ();
>>> +
>>> + =A0ret =3D gdbarch_process_record (gdbarch,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 regcache_read=
_pc (record_regcache));
>>> + =A0if (ret > 0)
>>> + =A0 =A0error (_("Process record: inferior program stopped."));
>>> + =A0if (ret < 0)
>>> + =A0 =A0error (_("Process record: failed to record execution log."));
>>> +
>>> + =A0discard_cleanups (old_cleanups);
>>> +
>>> + =A0record_list->next =3D record_arch_list_head;
>>> + =A0record_arch_list_head->prev =3D record_list;
>>> + =A0record_list =3D record_arch_list_tail;
>>> +
>>> + =A0if (record_insn_num =3D=3D record_insn_max_num && record_insn_max_=
num)
>>> + =A0 =A0record_list_release_first ();
>>> + =A0else
>>> + =A0 =A0record_insn_num++;
>>> +}
>>> +
>>
>>
>>> +/* Things to clean up if we error or QUIT out of function that set
>>> + =A0 record_gdb_operation_disable (ie. command that caused target_wait=
 to
>>> + =A0 be called). =A0*/
>>> +static void
>>> +record_gdb_operation_disable_cleanups (void *ignore)
>>> +{
>>> + =A0record_gdb_operation_disable =3D 0;
>>> +}
>>> +
>>> +struct cleanup *
>>> +record_gdb_operation_disable_set (void)
>>> +{
>>> + =A0struct cleanup *old_cleanups =3D
>>> + =A0 =A0make_cleanup (record_gdb_operation_disable_cleanups, 0);
>>> + =A0record_gdb_operation_disable =3D 1;
>>> +
>>> + =A0return old_cleanups;
>>> +}
>>
>> This is make_cleanup_restore_integer.
>>
>>> +
>>> +static void
>>> +record_open (char *name, int from_tty)
>>> +{
>>> + =A0struct target_ops *t;
>>> +
>>> + =A0if (record_debug)
>>> + =A0 =A0fprintf_unfiltered (gdb_stdlog, "Process record: record_open\n=
");
>>> +
>>> + =A0/* check exec */
>>
>> and core.
>>
>>> + =A0if (!target_has_execution)
>>> + =A0 =A0error (_("Process record: the program is not being run."));
>>> + =A0if (non_stop)
>>> + =A0 =A0error (_("Process record target can't debug inferior in non-st=
op mode "
>>> + =A0 =A0 =A0 =A0 =A0"(non-stop)."));
>>> + =A0if (target_async_permitted)
>>> + =A0 =A0error (_("Process record target can't debug inferior in asynch=
ronous "
>>> + =A0 =A0 =A0 =A0 =A0"mode (target-async)."));
>>> +
>>> + =A0if (!gdbarch_process_record_p (current_gdbarch))
>>> + =A0 =A0error (_("Process record: the current architecture doesn't sup=
port "
>>> + =A0 =A0 =A0 =A0 =A0"record function."));
>>> +
>>> + =A0/* Check if record target is already running. =A0*/
>>> + =A0if (TARGET_IS_PROCESS_RECORD)
>>> + =A0 =A0{
>>> + =A0 =A0 =A0if (!nquery
>>> + =A0 =A0 =A0 (_("Process record target already running, do you want to=
 delete "
>>> + =A0 =A0 =A0 =A0 =A0"the old record log?")))
>>> + =A0 =A0 return;
>>> + =A0 =A0}
>>> +
>>> + =A0/* Set the beneath function pointers. =A0*/
>>> + =A0for (t =3D current_target.beneath; t !=3D NULL; t =3D t->beneath)
>>> + =A0 =A0{
>>> + =A0 =A0 =A0if (!record_beneath_to_resume)
>>> + =A0 =A0 =A0 =A0{
>>> + =A0 =A0 =A0 record_beneath_to_resume =3D t->to_resume;
>>> + =A0 =A0 =A0 record_beneath_to_resume_ops =3D t;
>>> + =A0 =A0 =A0 =A0}
>>> + =A0 =A0 =A0if (!record_beneath_to_wait)
>>> + =A0 =A0 =A0 =A0{
>>> + =A0 =A0 =A0 record_beneath_to_wait =3D t->to_wait;
>>> + =A0 =A0 =A0 record_beneath_to_wait_ops =3D t;
>>> + =A0 =A0 =A0 =A0}
>>> + =A0 =A0 =A0if (!record_beneath_to_store_registers)
>>> + =A0 =A0 =A0 =A0{
>>> + =A0 =A0 =A0 record_beneath_to_store_registers =3D t->to_store_registe=
rs;
>>> + =A0 =A0 =A0 record_beneath_to_store_registers_ops =3D t;
>>> + =A0 =A0 =A0 =A0}
>>> + =A0 =A0 =A0if (!record_beneath_to_xfer_partial)
>>> + =A0 =A0 =A0 =A0{
>>> + =A0 =A0 =A0 record_beneath_to_xfer_partial =3D t->to_xfer_partial;
>>> + =A0 =A0 =A0 record_beneath_to_xfer_partial_ops =3D t;
>>> + =A0 =A0 =A0 =A0}
>>> + =A0 =A0 =A0if (!record_beneath_to_insert_breakpoint)
>>> + =A0 =A0 record_beneath_to_insert_breakpoint =3D t->to_insert_breakpoi=
nt;
>>> + =A0 =A0 =A0if (!record_beneath_to_remove_breakpoint)
>>> + =A0 =A0 record_beneath_to_remove_breakpoint =3D t->to_remove_breakpoi=
nt;
>>> + =A0 =A0}
>>> + =A0if (!record_beneath_to_resume)
>>> + =A0 =A0error (_("Process record can't get to_resume."));
>>> + =A0if (!record_beneath_to_wait)
>>> + =A0 =A0error (_("Process record can't get to_wait."));
>>> + =A0if (!record_beneath_to_store_registers)
>>> + =A0 =A0error (_("Process record can't get to_store_registers."));
>>> + =A0if (!record_beneath_to_xfer_partial)
>>> + =A0 =A0error (_("Process record can't get to_xfer_partial."));
>>> + =A0if (!record_beneath_to_insert_breakpoint)
>>> + =A0 =A0error (_("Process record can't get to_insert_breakpoint."));
>>> + =A0if (!record_beneath_to_remove_breakpoint)
>>> + =A0 =A0error (_("Process record can't get to_remove_breakpoint."));
>>
>> As I said above, this is better than making target.c aware of
>> these pointers, but, it still isn't ideal. =A0For one thing, if
>> some other layer/target is pushed after the record target is opened,
>> these will be wrong. =A0I would prefer that this beneath lookup
>> would be done at each callback implementation (record_resume, etc.),
>> but, I'm happy enough with this for now. =A0It is now contained, so we c=
an
>> clean this up afterwards...
>>
>>> +
>>> + =A0push_target (&record_ops);
>>> +
>>> + =A0/* Reset */
>>> + =A0record_insn_num =3D 0;
>>> + =A0record_list =3D &record_first;
>>> + =A0record_list->next =3D NULL;
>>> +}
>>> +
>>> +static void
>>> +record_close (int quitting)
>>> +{
>>> + =A0if (record_debug)
>>> + =A0 =A0fprintf_unfiltered (gdb_stdlog, "Process record: record_close\=
n");
>>> +
>>> + =A0record_list_release (record_list);
>>> +}
>>
>> Shouldn't this clear the record_beneath_* pointers as well?
>>
>>> +
>>> +static void
>>> +record_resume (struct target_ops *ops, ptid_t ptid, int step,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 enum target_signal siggnal)
>>> +{
>>> + =A0record_resume_step =3D step;
>>> + =A0record_resume_siggnal =3D siggnal;
>>> +
>>> + =A0if (!RECORD_IS_REPLAY)
>>> + =A0 =A0{
>>> + =A0 =A0 =A0record_message (current_gdbarch);
>>> + =A0 =A0 =A0record_beneath_to_resume (record_beneath_to_resume_ops, pt=
id, 1,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0siggna=
l);
>>> + =A0 =A0}
>>> +}
>>> +
>>> +static void
>>> +record_sig_handler (int signo)
>>> +{
>>> + =A0if (record_debug)
>>> + =A0 =A0fprintf_unfiltered (gdb_stdlog, "Process record: get a signal\=
n");
>>> +
>>> + =A0record_resume_step =3D 1;
>>> + =A0record_get_sig =3D 1;
>>> +}
>>
>> This handler is magical. =A0Why is it setting resume_step, for instance?
>> It would definitelly benefic from some comments. =A0In fact, most of the
>> file is undercommented.
>>
>>> +
>>> +static void
>>> +record_wait_cleanups (void *ignore)
>>> +{
>>> + =A0if (execution_direction =3D=3D EXEC_REVERSE)
>>> + =A0 =A0{
>>> + =A0 =A0 =A0if (record_list->next)
>>> + =A0 =A0 record_list =3D record_list->next;
>>> + =A0 =A0}
>>> + =A0else
>>> + =A0 =A0record_list =3D record_list->prev;
>>> +
>>> + =A0set_executing (inferior_ptid, 0);
>>> + =A0record_normal_stop ();
>>> +}
>>
>> See comments about record_normal_stop above.
>>
>>> +
>>> +/* record_wait
>>
>> Please remove the function name from the comment. =A0It's redundant.
>>
>>> + =A0 In replay mode, this function examines the recorded log and
>>> + =A0 determines where to stop. =A0*/
>>> +
>>> +static ptid_t
>>> +record_wait (struct target_ops *ops,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0ptid_t ptid, struct target_waitstatus *sta=
tus)
>>> +{
>>> + =A0struct cleanup *set_cleanups =3D record_gdb_operation_disable_set =
();
>>> +
>>> + =A0if (record_debug)
>>> + =A0 =A0fprintf_unfiltered (gdb_stdlog,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 "Process record: record_wait "
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 "record_resume_step =3D %d\n",
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 record_resume_step);
>>> +
>>> + =A0if (!RECORD_IS_REPLAY)
>>> + =A0 =A0{
>>> + =A0 =A0 =A0if (record_resume_step)
>>> + =A0 =A0 {
>>> + =A0 =A0 =A0 /* This is a single step. =A0*/
>>> + =A0 =A0 =A0 return record_beneath_to_wait (record_beneath_to_wait_ops,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =
=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0ptid, status);
>>> + =A0 =A0 }
>>> + =A0 =A0 =A0else
>>> + =A0 =A0 {
>>> + =A0 =A0 =A0 if (record_resume_step)
>>> + =A0 =A0 =A0 =A0 {
>>> + =A0 =A0 =A0 =A0 =A0 /* This is a single step. =A0*/
>>> + =A0 =A0 =A0 =A0 =A0 return record_beneath_to_wait (record_beneath_to_=
wait_ops,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =
=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0ptid, status);
>>> + =A0 =A0 =A0 =A0 }
>>> + =A0 =A0 =A0 else
>>> + =A0 =A0 =A0 =A0 {
>>> + =A0 =A0 =A0 =A0 =A0 /* This is not a single step. =A0*/
>>> + =A0 =A0 =A0 =A0 =A0 ptid_t ret;
>>> + =A0 =A0 =A0 =A0 =A0 int is_breakpoint =3D 1;
>>> + =A0 =A0 =A0 =A0 =A0 CORE_ADDR pc =3D 0;
>>> + =A0 =A0 =A0 =A0 =A0 int pc_is_read =3D 0;
>>> + =A0 =A0 =A0 =A0 =A0 struct bp_location *bl;
>>> + =A0 =A0 =A0 =A0 =A0 struct breakpoint *b;
>>> +
>>> + =A0 =A0 =A0 =A0 =A0 do
>>> + =A0 =A0 =A0 =A0 =A0 =A0 {
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 ret =3D record_beneath_to_wait (record_be=
neath_to_wait_ops,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =
=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0ptid, status);
>>> +
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 if (status->kind =3D=3D TARGET_WAITKIND_S=
TOPPED
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 && status->value.sig =3D=3D TARGE=
T_SIGNAL_TRAP)
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 {
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 /* Check if there is a breakpoint=
. =A0*/
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 pc_is_read =3D 0;
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 registers_changed ();
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 for (bl =3D bp_location_chain; bl=
; bl =3D bl->global_next)
>>
>> This will need to be fixed. =A0Can you use the breakpoint_here-like func=
tions
>> exported by breakpoint.h instead of referencing bp_location_chain direct=
ly?
>>
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 {
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 b =3D bl->owner;
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 gdb_assert (b);
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 if (b->enable_state !=3D =
bp_enabled
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 && b->enable_stat=
e !=3D bp_permanent)
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 continue;
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 if (!pc_is_read)
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 {
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 pc =3D
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 regcache_read=
_pc (get_thread_regcache (ret));
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 pc_is_read =3D 1;
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 }
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 switch (b->type)
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 {
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 default:
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 if (bl->address =
=3D=3D pc)
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 goto breakpoi=
nt;
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 break;
>>> +
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 case bp_watchpoint:
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 /* XXX teawater: =
I still not very clear how to
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0deal with =
it. =A0*/
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 goto breakpoint;
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 break;
>>> +
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 case bp_catchpoint:
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 gdb_assert (b->op=
s !=3D NULL
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =
=A0 =A0 && b->ops->breakpoint_hit !=3D NULL);
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 if (b->ops->break=
point_hit (b))
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 goto breakpoi=
nt;
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 break;
>>> +
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 case bp_hardware_watc=
hpoint:
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 case bp_read_watchpoi=
nt:
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 case bp_access_watchp=
oint:
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 if (STOPPED_BY_WA=
TCHPOINT (0))
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 goto breakpoi=
nt;
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 break;
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 }
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 }
>>> +
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 /* There is not a breakpoint. =A0=
*/
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 record_message (current_gdbarch);
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 record_beneath_to_resume (record_=
beneath_to_resume_ops,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =
=A0 =A0 =A0 =A0 =A0 =A0 =A0ptid, 1,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =
=A0 =A0 =A0 =A0 =A0 record_resume_siggnal);
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 continue;
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 }
>>> +
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 is_breakpoint =3D 0;
>>> +
>>> + =A0 =A0 =A0 =A0 =A0 =A0 breakpoint:
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 /* Add gdbarch_decr_pc_after_break to pc =
because gdb will
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0expect the pc to be at address plu=
s decr_pc_after_break
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0when the inferior stops at a break=
point. =A0*/
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 if (is_breakpoint)
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 {
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 CORE_ADDR decr_pc_after_break =3D
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 gdbarch_decr_pc_after_break (=
current_gdbarch);
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 if (decr_pc_after_break)
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 {
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 if (!pc_is_read)
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 pc =3D
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 regcache_read_pc =
(get_thread_regcache (ret));
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 regcache_write_pc (get_th=
read_regcache (ret),
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =
=A0 =A0 =A0 =A0pc + decr_pc_after_break);
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 }
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 }
>>> +
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 break;
>>> + =A0 =A0 =A0 =A0 =A0 =A0 }
>>> + =A0 =A0 =A0 =A0 =A0 while (1);
>>> +
>>> + =A0 =A0 =A0 =A0 =A0 return ret;
>>> + =A0 =A0 =A0 =A0 }
>>> + =A0 =A0 }
>>> + =A0 =A0}
>>> + =A0else
>>> + =A0 =A0{
>>> + =A0 =A0 =A0int need_dasm =3D 0;
>>> + =A0 =A0 =A0struct regcache *regcache =3D get_current_regcache ();
>>> + =A0 =A0 =A0int continue_flag =3D 1;
>>> + =A0 =A0 =A0int first_record_end =3D 1;
>>> + =A0 =A0 =A0struct cleanup *old_cleanups =3D make_cleanup (record_wait=
_cleanups, 0);
>>> + =A0 =A0 =A0CORE_ADDR tmp_pc;
>>> +
>>> + =A0 =A0 =A0status->kind =3D TARGET_WAITKIND_STOPPED;
>>> +
>>> + =A0 =A0 =A0/* Check breakpoint when forward execute. =A0*/
>>> + =A0 =A0 =A0if (execution_direction =3D=3D EXEC_FORWARD)
>>> + =A0 =A0 {
>>> + =A0 =A0 =A0 tmp_pc =3D regcache_read_pc (regcache);
>>> + =A0 =A0 =A0 if (breakpoint_inserted_here_p (tmp_pc))
>>> + =A0 =A0 =A0 =A0 {
>>> + =A0 =A0 =A0 =A0 =A0 if (record_debug)
>>> + =A0 =A0 =A0 =A0 =A0 =A0 fprintf_unfiltered (gdb_stdlog,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 "Proc=
ess record: break at 0x%s.\n",
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 paddr=
_nz (tmp_pc));
>>> + =A0 =A0 =A0 =A0 =A0 if (gdbarch_decr_pc_after_break (get_regcache_arc=
h (regcache))
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 && !record_resume_step)
>>> + =A0 =A0 =A0 =A0 =A0 =A0 regcache_write_pc (regcache,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0tmp_pc=
 +
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0gdbarc=
h_decr_pc_after_break
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0(get_r=
egcache_arch (regcache)));
>>> + =A0 =A0 =A0 =A0 =A0 goto replay_out;
>>> + =A0 =A0 =A0 =A0 }
>>> + =A0 =A0 }
>>> +
>>> + =A0 =A0 =A0record_get_sig =3D 0;
>>> + =A0 =A0 =A0signal (SIGINT, record_sig_handler);
>>> + =A0 =A0 =A0/* If GDB is in terminal_inferior mode, it will not get th=
e signal.
>>> + =A0 =A0 =A0 =A0 And in GDB replay mode, GDB doesn't need to be in ter=
minal_inferior
>>> + =A0 =A0 =A0 =A0 mode, because inferior will not executed.
>>> + =A0 =A0 =A0 =A0 Then set it to terminal_ours to make GDB get the sign=
al. =A0*/
>>> + =A0 =A0 =A0target_terminal_ours ();
>>> +
>>> + =A0 =A0 =A0/* In EXEC_FORWARD mode, record_list points to the tail of=
 prev
>>> + =A0 =A0 =A0 =A0 instruction. =A0*/
>>> + =A0 =A0 =A0if (execution_direction =3D=3D EXEC_FORWARD && record_list=
->next)
>>> + =A0 =A0 record_list =3D record_list->next;
>>> +
>>> + =A0 =A0 =A0/* Loop over the record_list, looking for the next place to
>>> + =A0 =A0 =A0stop. =A0*/
>>> + =A0 =A0 =A0do
>>> + =A0 =A0 {
>>> + =A0 =A0 =A0 /* Check for beginning and end of log. =A0*/
>>> + =A0 =A0 =A0 if (execution_direction =3D=3D EXEC_REVERSE
>>> + =A0 =A0 =A0 =A0 =A0 && record_list =3D=3D &record_first)
>>> + =A0 =A0 =A0 =A0 {
>>> + =A0 =A0 =A0 =A0 =A0 /* Hit beginning of record log in reverse. =A0*/
>>> + =A0 =A0 =A0 =A0 =A0 status->kind =3D TARGET_WAITKIND_NO_HISTORY;
>>> + =A0 =A0 =A0 =A0 =A0 break;
>>> + =A0 =A0 =A0 =A0 }
>>> + =A0 =A0 =A0 if (execution_direction !=3D EXEC_REVERSE && !record_list=
->next)
>>> + =A0 =A0 =A0 =A0 {
>>> + =A0 =A0 =A0 =A0 =A0 /* Hit end of record log going forward. =A0*/
>>> + =A0 =A0 =A0 =A0 =A0 status->kind =3D TARGET_WAITKIND_NO_HISTORY;
>>> + =A0 =A0 =A0 =A0 =A0 break;
>>> + =A0 =A0 =A0 =A0 }
>>> +
>>> + =A0 =A0 =A0 /* Set ptid, register and memory according to record_list=
. =A0*/
>>> + =A0 =A0 =A0 if (record_list->type =3D=3D record_reg)
>>> + =A0 =A0 =A0 =A0 {
>>> + =A0 =A0 =A0 =A0 =A0 /* reg */
>>> + =A0 =A0 =A0 =A0 =A0 gdb_byte reg[MAX_REGISTER_SIZE];
>>> + =A0 =A0 =A0 =A0 =A0 if (record_debug > 1)
>>> + =A0 =A0 =A0 =A0 =A0 =A0 fprintf_unfiltered (gdb_stdlog,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 "Proc=
ess record: record_reg %s to "
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 "infe=
rior num =3D %d.\n",
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 host_=
address_to_string (record_list),
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 recor=
d_list->u.reg.num);
>>> + =A0 =A0 =A0 =A0 =A0 regcache_cooked_read (regcache, record_list->u.re=
g.num, reg);
>>> + =A0 =A0 =A0 =A0 =A0 regcache_cooked_write (regcache, record_list->u.r=
eg.num,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0re=
cord_list->u.reg.val);
>>> + =A0 =A0 =A0 =A0 =A0 memcpy (record_list->u.reg.val, reg, MAX_REGISTER=
_SIZE);
>>> + =A0 =A0 =A0 =A0 }
>>> + =A0 =A0 =A0 else if (record_list->type =3D=3D record_mem)
>>> + =A0 =A0 =A0 =A0 {
>>> + =A0 =A0 =A0 =A0 =A0 /* mem */
>>> + =A0 =A0 =A0 =A0 =A0 gdb_byte *mem =3D alloca (record_list->u.mem.len);
>>> + =A0 =A0 =A0 =A0 =A0 if (record_debug > 1)
>>> + =A0 =A0 =A0 =A0 =A0 =A0 fprintf_unfiltered (gdb_stdlog,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 "Proc=
ess record: record_mem %s to "
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 "infe=
rior addr =3D 0x%s len =3D %d.\n",
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 host_=
address_to_string (record_list),
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 paddr=
_nz (record_list->u.mem.addr),
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 recor=
d_list->u.mem.len);
>>> +
>>> + =A0 =A0 =A0 =A0 =A0 if (target_read_memory
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 (record_list->u.mem.addr, mem, record_lis=
t->u.mem.len))
>>> + =A0 =A0 =A0 =A0 =A0 =A0 error (_("Process record: error reading memor=
y at "
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0"addr =3D 0x%s len =3D %d.=
"),
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0paddr_nz (record_list->u.mem.a=
ddr),
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0record_list->u.mem.len);
>>> +
>>> + =A0 =A0 =A0 =A0 =A0 if (target_write_memory
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 (record_list->u.mem.addr, record_list->u.=
mem.val,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0record_list->u.mem.len))
>>> + =A0 =A0 =A0 =A0 =A0 =A0 error (_
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0("Process record: error writin=
g memory at "
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 "addr =3D 0x%s len =3D %d."),
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0paddr_nz (record_list->u.mem.a=
ddr),
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0record_list->u.mem.len);
>>> +
>>> + =A0 =A0 =A0 =A0 =A0 memcpy (record_list->u.mem.val, mem, record_list-=
>u.mem.len);
>>> + =A0 =A0 =A0 =A0 }
>>> + =A0 =A0 =A0 else
>>> + =A0 =A0 =A0 =A0 {
>>> + =A0 =A0 =A0 =A0 =A0 if (record_debug > 1)
>>> + =A0 =A0 =A0 =A0 =A0 =A0 fprintf_unfiltered (gdb_stdlog,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 "Proc=
ess record: record_end %s to "
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 "infe=
rior need_dasm =3D %d.\n",
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 host_=
address_to_string (record_list),
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 recor=
d_list->u.need_dasm);
>>> +
>>> + =A0 =A0 =A0 =A0 =A0 if (execution_direction =3D=3D EXEC_FORWARD)
>>> + =A0 =A0 =A0 =A0 =A0 =A0 need_dasm =3D record_list->u.need_dasm;
>>> + =A0 =A0 =A0 =A0 =A0 if (need_dasm)
>>> + =A0 =A0 =A0 =A0 =A0 =A0 gdbarch_process_record_dasm (current_gdbarch);
>>> +
>>> + =A0 =A0 =A0 =A0 =A0 if (first_record_end && execution_direction =3D=
=3D EXEC_REVERSE)
>>> + =A0 =A0 =A0 =A0 =A0 =A0 {
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 /* When reverse excute, the first record_=
end is the part of
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0current instruction. =A0*/
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 first_record_end =3D 0;
>>> + =A0 =A0 =A0 =A0 =A0 =A0 }
>>> + =A0 =A0 =A0 =A0 =A0 else
>>> + =A0 =A0 =A0 =A0 =A0 =A0 {
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 /* In EXEC_REVERSE mode, this is the reco=
rd_end of prev
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0instruction.
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0In EXEC_FORWARD mode, this is the =
record_end of current
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0instruction. =A0*/
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 /* step */
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 if (record_resume_step)
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 {
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 if (record_debug > 1)
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 fprintf_unfiltered (gdb_stdlo=
g,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =
=A0 =A0 =A0 "Process record: step.\n");
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 continue_flag =3D 0;
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 }
>>> +
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 /* check breakpoint */
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 tmp_pc =3D regcache_read_pc (regcache);
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 if (breakpoint_inserted_here_p (tmp_pc))
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 {
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 if (record_debug)
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 fprintf_unfiltered (gdb_stdlo=
g,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =
=A0 =A0 =A0 "Process record: break "
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =
=A0 =A0 =A0 "at 0x%s.\n",
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =
=A0 =A0 =A0 paddr_nz (tmp_pc));
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 if (gdbarch_decr_pc_after_break (=
get_regcache_arch (regcache))
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 && execution_direction =
=3D=3D EXEC_FORWARD
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 && !record_resume_step)
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 regcache_write_pc (regcache,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =
=A0 =A0 =A0tmp_pc +
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =
=A0 =A0 =A0gdbarch_decr_pc_after_break
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =
=A0 =A0 =A0(get_regcache_arch (regcache)));
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 continue_flag =3D 0;
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 }
>>> + =A0 =A0 =A0 =A0 =A0 =A0 }
>>> + =A0 =A0 =A0 =A0 =A0 if (execution_direction =3D=3D EXEC_REVERSE)
>>> + =A0 =A0 =A0 =A0 =A0 =A0 need_dasm =3D record_list->u.need_dasm;
>>> + =A0 =A0 =A0 =A0 }
>>> +
>>> +next:
>>> + =A0 =A0 =A0 if (continue_flag)
>>> + =A0 =A0 =A0 =A0 {
>>> + =A0 =A0 =A0 =A0 =A0 if (execution_direction =3D=3D EXEC_REVERSE)
>>> + =A0 =A0 =A0 =A0 =A0 =A0 {
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 if (record_list->prev)
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 record_list =3D record_list->prev;
>>> + =A0 =A0 =A0 =A0 =A0 =A0 }
>>> + =A0 =A0 =A0 =A0 =A0 else
>>> + =A0 =A0 =A0 =A0 =A0 =A0 {
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 if (record_list->next)
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 record_list =3D record_list->next;
>>> + =A0 =A0 =A0 =A0 =A0 =A0 }
>>> + =A0 =A0 =A0 =A0 }
>>> + =A0 =A0 }
>>> + =A0 =A0 =A0while (continue_flag);
>>> +
>>> + =A0 =A0 =A0signal (SIGINT, handle_sigint);
>>> +
>>> +replay_out:
>>> + =A0 =A0 =A0if (record_get_sig)
>>> + =A0 =A0 status->value.sig =3D TARGET_SIGNAL_INT;
>>> + =A0 =A0 =A0else
>>> + =A0 =A0 status->value.sig =3D TARGET_SIGNAL_TRAP;
>>> +
>>> + =A0 =A0 =A0discard_cleanups (old_cleanups);
>>> + =A0 =A0}
>>> +
>>> + =A0do_cleanups (set_cleanups);
>>> + =A0return inferior_ptid;
>>> +}
>>
>> I have to say that I find that function confusing, due to
>> the use of gotos, and excessive nesting. =A0Personally, I much prefer
>> code that does:
>>
>> =A0if (foo)
>> =A0 =A0{
>> =A0 =A0 =A0/* something */
>> =A0 =A0 =A0return;
>> =A0 =A0}
>>
>> =A0if (bar)
>> =A0 =A0{
>> =A0 =A0 =A0/* something */
>> =A0 =A0 =A0return;
>> =A0 =A0}
>>
>> =A0if (lala)
>> =A0 =A0{
>> =A0 =A0 =A0/* something */
>> =A0 =A0 =A0return;
>> =A0 =A0}
>>
>> Over:
>>
>> =A0if (foo)
>> =A0 =A0{
>> =A0 =A0 =A0/* something */
>> =A0 =A0 =A0return;
>> =A0 =A0}
>> =A0else
>> =A0 {
>> =A0 =A0 if (bar)
>> =A0 =A0 =A0 {
>> =A0 =A0 =A0 =A0 /* something */
>> =A0 =A0 =A0 =A0 return;
>> =A0 =A0 =A0 }
>> =A0 =A0 else
>> =A0 =A0 =A0{
>> =A0 =A0 =A0 =A0 if (lala)
>> =A0 =A0 =A0 =A0 =A0 {
>> =A0 =A0 =A0 =A0 =A0 =A0 /* something */
>> =A0 =A0 =A0 =A0 =A0 =A0 return;
>> =A0 =A0 =A0 =A0 =A0 }
>> =A0 =A0 =A0}
>> =A0 }
>>
>>
>>> +
>>> +static void
>>> +record_disconnect (struct target_ops *target, char *args, int from_tty)
>>> +{
>>> + =A0if (record_debug)
>>> + =A0 =A0fprintf_unfiltered (gdb_stdlog, "Process record: record_discon=
nect\n");
>>> +
>>> + =A0unpush_target (&record_ops);
>>> + =A0target_disconnect (args, from_tty);
>>> +}
>>> +
>>> +static void
>>> +record_detach (struct target_ops *ops, char *args, int from_tty)
>>> +{
>>> + =A0if (record_debug)
>>> + =A0 =A0fprintf_unfiltered (gdb_stdlog, "Process record: record_detach=
\n");
>>> +
>>> + =A0unpush_target (&record_ops);
>>> + =A0target_detach (args, from_tty);
>>> +}
>>
>> This trick you're using happens to work, but, could you try
>> this instead? =A0Here and elsewhere similarly.
>>
>> =A0struct target_ops *beneath =3D find_target_beaneath (ops);
>> =A0unpush_target (ops);
>> =A0beneath->to_detach (args, from_tty);
>>
>>> +
>>> +static void
>>> +record_mourn_inferior (struct target_ops *ops)
>>> +{
>>> + =A0if (record_debug)
>>> + =A0 =A0fprintf_unfiltered (gdb_stdlog, "Process record: "
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 "reco=
rd_mourn_inferior\n");
>>> +
>>> + =A0unpush_target (&record_ops);
>>> + =A0target_mourn_inferior ();
>>> +}
>>> +
>>> +/* Close process record target before killing the inferior process. =
=A0*/
>>> +static void
>>> +record_kill (void)
>>> +{
>>> + =A0if (record_debug)
>>> + =A0 =A0fprintf_unfiltered (gdb_stdlog, "Process record: record_kill\n=
");
>>> +
>>> + =A0unpush_target (&record_ops);
>>> + =A0target_kill ();
>>> +}
>>> +
>>> +/* Record registers change (by user or by GDB) to list as an instructi=
on. =A0*/
>>> +static void
>>> +record_registers_change (struct regcache *regcache, int regnum)
>>> +{
>>> + =A0/* Check record_insn_num. =A0*/
>>> + =A0record_check_insn_num (0);
>>> +
>>> + =A0record_arch_list_head =3D NULL;
>>> + =A0record_arch_list_tail =3D NULL;
>>> +
>>> + =A0record_regcache =3D get_current_regcache ();
>>> +
>>> + =A0if (regnum < 0)
>>> + =A0 =A0{
>>> + =A0 =A0 =A0int i;
>>> + =A0 =A0 =A0for (i =3D 0; i < gdbarch_num_regs (get_regcache_arch (reg=
cache)); i++)
>>> + =A0 =A0 {
>>> + =A0 =A0 =A0 if (record_arch_list_add_reg (i))
>>> + =A0 =A0 =A0 =A0 {
>>> + =A0 =A0 =A0 =A0 =A0 record_list_release (record_arch_list_tail);
>>> + =A0 =A0 =A0 =A0 =A0 error (_("Process record: failed to record execut=
ion log."));
>>> + =A0 =A0 =A0 =A0 }
>>> + =A0 =A0 }
>>> + =A0 =A0}
>>> + =A0else
>>> + =A0 =A0{
>>> + =A0 =A0 =A0if (record_arch_list_add_reg (regnum))
>>> + =A0 =A0 {
>>> + =A0 =A0 =A0 record_list_release (record_arch_list_tail);
>>> + =A0 =A0 =A0 error (_("Process record: failed to record execution log.=
"));
>>> + =A0 =A0 }
>>> + =A0 =A0}
>>> + =A0if (record_arch_list_add_end (0))
>>> + =A0 =A0{
>>> + =A0 =A0 =A0record_list_release (record_arch_list_tail);
>>> + =A0 =A0 =A0error (_("Process record: failed to record execution log."=
));
>>> + =A0 =A0}
>>> + =A0record_list->next =3D record_arch_list_head;
>>> + =A0record_arch_list_head->prev =3D record_list;
>>> + =A0record_list =3D record_arch_list_tail;
>>> +
>>> + =A0if (record_insn_num =3D=3D record_insn_max_num && record_insn_max_=
num)
>>> + =A0 =A0record_list_release_first ();
>>> + =A0else
>>> + =A0 =A0record_insn_num++;
>>> +}
>>> +
>>> +static void
>>> +record_store_registers (struct target_ops *ops, struct regcache *regca=
che,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0int regno)
>>> +{
>>> + =A0if (!record_gdb_operation_disable)
>>> + =A0 =A0{
>>> + =A0 =A0 =A0if (RECORD_IS_REPLAY)
>>> + =A0 =A0 {
>>> + =A0 =A0 =A0 int n;
>>> + =A0 =A0 =A0 struct cleanup *old_cleanups;
>>> +
>>> + =A0 =A0 =A0 /* Let user choose if he wants to write register or not. =
=A0*/
>>> + =A0 =A0 =A0 if (regno < 0)
>>> + =A0 =A0 =A0 =A0 n =3D
>>> + =A0 =A0 =A0 =A0 =A0 nquery (_("Because GDB is in replay mode, changin=
g the "
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 "value of a register will mak=
e the execution "
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 "log unusable from this point=
 onward. =A0"
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 "Change all registers?"));
>>> + =A0 =A0 =A0 else
>>> + =A0 =A0 =A0 =A0 n =3D
>>> + =A0 =A0 =A0 =A0 =A0 nquery (_("Because GDB is in replay mode, changin=
g the value "
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 "of a register will make the =
execution log unusable "
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 "from this point onward. =A0C=
hange register %s?"),
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 gdbarch_register_name (get_regcac=
he_arch (regcache),
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =
=A0 =A0 =A0 =A0 =A0regno));
>>> +
>>> + =A0 =A0 =A0 if (!n)
>>> + =A0 =A0 =A0 =A0 {
>>> + =A0 =A0 =A0 =A0 =A0 /* Invalidate the value of regcache that was set =
in function
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0"regcache_raw_write". =A0*/
>>> + =A0 =A0 =A0 =A0 =A0 if (regno < 0)
>>> + =A0 =A0 =A0 =A0 =A0 =A0 {
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 int i;
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 for (i =3D 0;
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0i < gdbarch_num_regs (get_regc=
ache_arch (regcache));
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0i++)
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 regcache_invalidate (regcache, i);
>>> + =A0 =A0 =A0 =A0 =A0 =A0 }
>>> + =A0 =A0 =A0 =A0 =A0 else
>>> + =A0 =A0 =A0 =A0 =A0 =A0 regcache_invalidate (regcache, regno);
>>> +
>>> + =A0 =A0 =A0 =A0 =A0 error (_("Process record canceled the operation."=
));
>>> + =A0 =A0 =A0 =A0 }
>>> +
>>> + =A0 =A0 =A0 /* Destroy the record from here forward. =A0*/
>>> + =A0 =A0 =A0 record_list_release_next ();
>>> + =A0 =A0 }
>>> +
>>> + =A0 =A0 =A0record_registers_change (regcache, regno);
>>> + =A0 =A0}
>>> + =A0record_beneath_to_store_registers (record_beneath_to_store_registe=
rs_ops,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =
=A0 regcache, regno);
>>> +}
>>> +
>>> +/* record_xfer_partial -- behavior is conditional on RECORD_IS_REPLAY.
>>> + =A0 In replay mode, we cannot write memory unles we are willing to
>>> + =A0 invalidate the record/replay log from this point forward. =A0*/
>>> +
>>> +static LONGEST
>>> +record_xfer_partial (struct target_ops *ops, enum target_object object,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0const char *annex, gdb_byte * read=
buf,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0const gdb_byte * writebuf, ULONGES=
T offset, LONGEST len)
>>> +{
>>> + =A0if (!record_gdb_operation_disable
>>> + =A0 =A0 =A0&& (object =3D=3D TARGET_OBJECT_MEMORY
>>> + =A0 =A0 =A0 || object =3D=3D TARGET_OBJECT_RAW_MEMORY) && writebuf)
>>> + =A0 =A0{
>>> + =A0 =A0 =A0if (RECORD_IS_REPLAY)
>>> + =A0 =A0 {
>>> + =A0 =A0 =A0 /* Let user choose if he wants to write memory or not. =
=A0*/
>>> + =A0 =A0 =A0 if (!nquery (_("Because GDB is in replay mode, writing to=
 memory "
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0"will make the execution l=
og unusable from this "
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0"point onward. =A0Write me=
mory at address 0x%s?"),
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0paddr_nz (offset)))
>>> + =A0 =A0 =A0 =A0 return -1;
>>> +
>>> + =A0 =A0 =A0 /* Destroy the record from here forward. =A0*/
>>> + =A0 =A0 =A0 record_list_release_next ();
>>> + =A0 =A0 }
>>> +
>>> + =A0 =A0 =A0/* Check record_insn_num */
>>> + =A0 =A0 =A0record_check_insn_num (0);
>>> +
>>> + =A0 =A0 =A0/* Record registers change to list as an instruction. =A0*/
>>> + =A0 =A0 =A0record_arch_list_head =3D NULL;
>>> + =A0 =A0 =A0record_arch_list_tail =3D NULL;
>>> + =A0 =A0 =A0if (record_arch_list_add_mem (offset, len))
>>> + =A0 =A0 {
>>> + =A0 =A0 =A0 record_list_release (record_arch_list_tail);
>>> + =A0 =A0 =A0 if (record_debug)
>>> + =A0 =A0 =A0 =A0 fprintf_unfiltered (gdb_stdlog,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 _("Process re=
cord: failed to record "
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 "executio=
n log."));
>>> + =A0 =A0 =A0 return -1;
>>> + =A0 =A0 }
>>> + =A0 =A0 =A0if (record_arch_list_add_end (0))
>>> + =A0 =A0 {
>>> + =A0 =A0 =A0 record_list_release (record_arch_list_tail);
>>> + =A0 =A0 =A0 if (record_debug)
>>> + =A0 =A0 =A0 =A0 fprintf_unfiltered (gdb_stdlog,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 _("Process re=
cord: failed to record "
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 "executio=
n log."));
>>> + =A0 =A0 =A0 return -1;
>>> + =A0 =A0 }
>>> + =A0 =A0 =A0record_list->next =3D record_arch_list_head;
>>> + =A0 =A0 =A0record_arch_list_head->prev =3D record_list;
>>> + =A0 =A0 =A0record_list =3D record_arch_list_tail;
>>> +
>>> + =A0 =A0 =A0if (record_insn_num =3D=3D record_insn_max_num && record_i=
nsn_max_num)
>>> + =A0 =A0 record_list_release_first ();
>>> + =A0 =A0 =A0else
>>> + =A0 =A0 record_insn_num++;
>>> + =A0 =A0}
>>> +
>>> + =A0return record_beneath_to_xfer_partial (record_beneath_to_xfer_part=
ial_ops,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =
=A0 =A0 =A0 object, annex, readbuf, writebuf,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =
=A0 =A0 =A0 offset, len);
>>> +}
>>> +
>>> +/* record_insert_breakpoint
>>> + =A0 record_remove_breakpoint
>>> + =A0 Behavior is conditional on RECORD_IS_REPLAY.
>>> + =A0 We will not actually insert or remove breakpoints when replaying,
>>> + =A0 nor when recording. =A0*/
>>> +
>>> +static int
>>> +record_insert_breakpoint (struct bp_target_info *bp_tgt)
>>> +{
>>> + =A0if (!RECORD_IS_REPLAY)
>>> + =A0 =A0{
>>> + =A0 =A0 =A0struct cleanup *old_cleanups =3D record_gdb_operation_disa=
ble_set ();
>>> + =A0 =A0 =A0int ret =3D record_beneath_to_insert_breakpoint (bp_tgt);
>>> +
>>> + =A0 =A0 =A0do_cleanups (old_cleanups);
>>> +
>>> + =A0 =A0 =A0return ret;
>>> + =A0 =A0}
>>> +
>>> + =A0return 0;
>>> +}
>>> +
>>> +static int
>>> +record_remove_breakpoint (struct bp_target_info *bp_tgt)
>>> +{
>>> + =A0if (!RECORD_IS_REPLAY)
>>> + =A0 =A0{
>>> + =A0 =A0 =A0struct cleanup *old_cleanups =3D record_gdb_operation_disa=
ble_set ();
>>> + =A0 =A0 =A0int ret =3D record_beneath_to_remove_breakpoint (bp_tgt);
>>> +
>>> + =A0 =A0 =A0do_cleanups (old_cleanups);
>>> +
>>> + =A0 =A0 =A0return ret;
>>> + =A0 =A0}
>>> +
>>> + =A0return 0;
>>> +}
>>> +
>>> +static int
>>> +record_can_execute_reverse (void)
>>> +{
>>> + =A0return 1;
>>> +}
>>> +
>>> +static void
>>> +init_record_ops (void)
>>> +{
>>> + =A0record_ops.to_shortname =3D "record";
>>> + =A0record_ops.to_longname =3D "Process record and replay target";
>>> + =A0record_ops.to_doc =3D
>>> + =A0 =A0"Log program while executing and replay execution from log.";
>>> + =A0record_ops.to_open =3D record_open;
>>> + =A0record_ops.to_close =3D record_close;
>>> + =A0record_ops.to_resume =3D record_resume;
>>> + =A0record_ops.to_wait =3D record_wait;
>>> + =A0record_ops.to_disconnect =3D record_disconnect;
>>> + =A0record_ops.to_detach =3D record_detach;
>>> + =A0record_ops.to_mourn_inferior =3D record_mourn_inferior;
>>> + =A0record_ops.to_kill =3D record_kill;
>>> + =A0record_ops.to_create_inferior =3D find_default_create_inferior;
>>> + =A0record_ops.to_store_registers =3D record_store_registers;
>>> + =A0record_ops.to_xfer_partial =3D record_xfer_partial;
>>> + =A0record_ops.to_insert_breakpoint =3D record_insert_breakpoint;
>>> + =A0record_ops.to_remove_breakpoint =3D record_remove_breakpoint;
>>> + =A0record_ops.to_can_execute_reverse =3D record_can_execute_reverse;
>>> + =A0record_ops.to_stratum =3D record_stratum;
>>> + =A0record_ops.to_magic =3D OPS_MAGIC;
>>> +}
>>> +
>>> +static void
>>> +show_record_debug (struct ui_file *file, int from_tty,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0struct cmd_list_element *c, const char=
 *value)
>>> +{
>>> + =A0fprintf_filtered (file, _("Debugging of process record target is %=
s.\n"),
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 value);
>>> +}
>>> +
>>> +/* cmd_record_start -- alias for "target record". =A0*/
>>> +
>>> +static void
>>> +cmd_record_start (char *args, int from_tty)
>>> +{
>>> + =A0execute_command ("target record", from_tty);
>>> +}
>>> +
>>> +/* cmd_record_delete -- truncate the record log from the present point
>>> + =A0 of replay until the end. =A0*/
>>> +
>>> +static void
>>> +cmd_record_delete (char *args, int from_tty)
>>> +{
>>> + =A0if (TARGET_IS_PROCESS_RECORD)
>>> + =A0 =A0{
>>> + =A0 =A0 =A0if (RECORD_IS_REPLAY)
>>> + =A0 =A0 {
>>> + =A0 =A0 =A0 if (!from_tty || query (_("Delete the log from this point=
 forward "
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 "and =
begin to record the running message "
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 "at c=
urrent PC?")))
>>> + =A0 =A0 =A0 =A0 record_list_release_next ();
>>> + =A0 =A0 }
>>> + =A0 =A0 =A0else
>>> + =A0 =A0 =A0 printf_unfiltered (_("Already at end of record list.\n"));
>>> +
>>> + =A0 =A0}
>>> + =A0else
>>> + =A0 =A0printf_unfiltered (_("Process record is not started.\n"));
>>> +}
>>> +
>>> +/* cmd_record_stop -- implement the "stoprecord" command. =A0*/
>>> +
>>> +static void
>>> +cmd_record_stop (char *args, int from_tty)
>>> +{
>>> + =A0if (TARGET_IS_PROCESS_RECORD)
>>> + =A0 =A0{
>>> + =A0 =A0 =A0if (!record_list || !from_tty || query (_("Delete recorded=
 log and "
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =
=A0 =A0 =A0 =A0 =A0 "stop recording?")))
>>> + =A0 =A0 unpush_target (&record_ops);
>>> + =A0 =A0}
>>> + =A0else
>>> + =A0 =A0printf_unfiltered (_("Process record is not started.\n"));
>>> +}
>>> +
>>> +/* set_record_insn_max_num -- set upper limit of record log size. =A0*/
>>> +
>>> +static void
>>> +set_record_insn_max_num (char *args, int from_tty, struct cmd_list_ele=
ment *c)
>>> +{
>>> + =A0if (record_insn_num > record_insn_max_num && record_insn_max_num)
>>> + =A0 =A0{
>>> + =A0 =A0 =A0printf_unfiltered (_("Record instructions number is bigger=
 than "
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0"record instructions m=
ax number. =A0Auto delete "
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0"the first ones?\n"));
>>> +
>>> + =A0 =A0 =A0while (record_insn_num > record_insn_max_num)
>>> + =A0 =A0 record_list_release_first ();
>>> + =A0 =A0}
>>> +}
>>> +
>>> +/* show_record_insn_number -- print the current index
>>> + =A0 into the record log (number of insns recorded so far). =A0*/
>>> +
>>> +static void
>>> +show_record_insn_number (char *ignore, int from_tty)
>>> +{
>>> + =A0printf_unfiltered (_("Record instruction number is %d.\n"),
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0record_insn_num);
>>> +}
>>> +
>>> +void
>>> +_initialize_record (void)
>>> +{
>>> + =A0/* Init record_maskall. =A0*/
>>> + =A0if (sigfillset (&record_maskall) =3D=3D -1)
>>> + =A0 =A0perror_with_name (_("Process record: sigfillset failed"));
>>
>> This will not build on all hosts. =A0Is it still needed? =A0I can't
>> find any other reference to this variable in this patch.
>>
>>> +
>>> + =A0/* Init record_first. =A0*/
>>> + =A0record_first.prev =3D NULL;
>>> + =A0record_first.next =3D NULL;
>>> + =A0record_first.type =3D record_end;
>>> + =A0record_first.u.need_dasm =3D 0;
>>> +
>>> + =A0init_record_ops ();
>>> + =A0add_target (&record_ops);
>>> +
>>> + =A0add_setshow_zinteger_cmd ("record", no_class, &record_debug,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 _("Set debugging of r=
ecord/replay feature."),
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 _("Show debugging of =
record/replay feature."),
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 _("When enabled, debu=
gging output for "
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 "record/replay fe=
ature is displayed."),
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 NULL, show_record_deb=
ug, &setdebuglist,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 &showdebuglist);
>>> +
>>> + =A0add_com ("record", class_obscure, cmd_record_start,
>>> + =A0 =A0 =A0 =A0_("Abbreviated form of \"target record\" command."));
>>> +
>>> + =A0add_com_alias ("rec", "record", class_obscure, 1);
>>> +
>>> + =A0/* XXX: I try to use some simple commands such as "disconnect" and
>>> + =A0 =A0 "detach" to support this functions. =A0But these commands all=
 have
>>> + =A0 =A0 other affect to GDB such as call function "no_shared_librarie=
s".
>>> + =A0 =A0 So I add special commands to GDB. =A0*/
>>> + =A0add_com ("delrecord", class_obscure, cmd_record_delete,
>>> + =A0 =A0 =A0 =A0_("Delete the rest of execution log and start recordin=
g it anew."));
>>> + =A0add_com_alias ("dr", "delrecord", class_obscure, 1);
>>> + =A0add_com ("stoprecord", class_obscure, cmd_record_stop,
>>> + =A0 =A0 =A0 =A0_("Stop the record/replay target."));
>>> + =A0add_com_alias ("sr", "stoprecord", class_obscure, 1);
>>> +
>>> + =A0/* Record instructions number limit command. =A0*/
>>> + =A0add_setshow_boolean_cmd ("record-stop-at-limit", no_class,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 &record_stop_at_limit,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 _("Set whether record=
/replay stop when "
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 "record/replay bu=
ffer becomes full."),
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 _("Show whether recor=
d/replay stop when "
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 "record/replay bu=
ffer becomes full."),
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 _("Enable is default =
value.\n"
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 "When enabled, if=
 the record/replay buffer "
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 "becomes full,\n"
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0"ask user =
what to do.\n"
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0"When disa=
bled, if the record/replay buffer "
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 "becomes full,\n"
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0"delete it=
 and start new recording."),
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 NULL, NULL, &setlist,=
 &showlist);
>>> + =A0add_setshow_zinteger_cmd ("record-insn-number-max", no_class,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 &record_insn_max_num,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 _("Set record/replay =
buffer limit."),
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 _("Show record/replay=
 buffer limit."),
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 _("Set the maximum nu=
mber of instructions to be "
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0"stored in=
 the\n"
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0"record/re=
play buffer. =A0"
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0"Zero mean=
s unlimited (default 200000)."),
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 set_record_insn_max_n=
um,
>>> + =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 NULL, &setlist, &show=
list);
>>> + =A0add_info ("record-insn-number", show_record_insn_number,
>>> + =A0 =A0 =A0 =A0 _("Show the current number of instructions in the "
>>> + =A0 =A0 =A0 =A0 =A0 "record/replay buffer."));
>>> +}
>>> Index: src/gdb/record.h
>>> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
>>> --- /dev/null 1970-01-01 00:00:00.000000000 +0000
>>> +++ src/gdb/record.h =A02009-02-28 20:23:20.000000000 +0000
>>> @@ -0,0 +1,87 @@
>>> +/* Process record and replay target for GDB, the GNU debugger.
>>> +
>>> + =A0 Copyright (C) 2008 Free Software Foundation, Inc.
>>> +
>>> + =A0 This file is part of GDB.
>>> +
>>> + =A0 This program is free software; you can redistribute it and/or mod=
ify
>>> + =A0 it under the terms of the GNU General Public License as published=
 by
>>> + =A0 the Free Software Foundation; either version 3 of the License, or
>>> + =A0 (at your option) any later version.
>>> +
>>> + =A0 This program is distributed in the hope that it will be useful,
>>> + =A0 but WITHOUT ANY WARRANTY; without even the implied warranty of
>>> + =A0 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. =A0See the
>>> + =A0 GNU General Public License for more details.
>>> +
>>> + =A0 You should have received a copy of the GNU General Public License
>>> + =A0 along with this program. =A0If not, see <http://www.gnu.org/licen=
ses/>. =A0*/
>>> +
>>> +#ifndef _RECORD_H_
>>> +#define _RECORD_H_
>>> +
>>> +#define TARGET_IS_PROCESS_RECORD =A0 \
>>> + =A0 =A0 (current_target.beneath =3D=3D &record_ops)
>>
>> Sorry, but I repeat the request I've made several times already. =A0This=
 is
>> not the right way to do this. =A0You need to add a new target_ops method=
 or
>> property that the core of GDB checks on. =A0It is not correct that make
>> the core of GDB reference record_ops directly. =A0To come up with
>> the target callback's name, at each call site of TARGET_IS_PROCESS_RECOR=
D,
>> consider what is the property of the current target that GDB needs to
>> know about the current target. =A0Is it something like:
>>
>> =A0target_is_recording () ?
>> =A0target_is_replaying () ?
>> =A0target_is_read_only () ?
>>
>> etc.
>>
>>> +#define RECORD_IS_REPLAY \
>>> + =A0 =A0 (record_list->next || execution_direction =3D=3D EXEC_REVERSE)
>>
>> AFAICS, this macro is not used outside of record.c. =A0It should move
>> there, along with anything that isn't used outside of record.c.
>>
>>> +
>>> +typedef struct record_reg_s
>>> +{
>>> + =A0int num;
>>> + =A0gdb_byte *val;
>>> +} record_reg_t;
>>> +
>>> +typedef struct record_mem_s
>>> +{
>>> + =A0CORE_ADDR addr;
>>> + =A0int len;
>>> + =A0gdb_byte *val;
>>> +} record_mem_t;
>>> +
>>> +enum record_type
>>> +{
>>> + =A0record_end =3D 0,
>>> + =A0record_reg,
>>> + =A0record_mem
>>> +};
>>> +
>>> +/* This is the core struct of record function.
>>> +
>>> + =A0 An entity of record_t is a record of the value change of a regist=
er
>>> + =A0 ("record_reg") or a part of memory ("record_mem"). =A0And each
>>> + =A0 instruction must has a record_t ("record_end") that points out th=
is
>>> + =A0 is the last record_t of this instruction.
>>> +
>>> + =A0 Each record_t is linked to "record_list" by "prev" and "next".
>>> + */
>>> +typedef struct record_s
>>> +{
>>> + =A0struct record_s *prev;
>>> + =A0struct record_s *next;
>>> + =A0enum record_type type;
>>> + =A0union
>>> + =A0{
>>> + =A0 =A0/* reg */
>>> + =A0 =A0record_reg_t reg;
>>> + =A0 =A0/* mem */
>>> + =A0 =A0record_mem_t mem;
>>> + =A0 =A0/* end */
>>> + =A0 =A0int need_dasm;
>>> + =A0} u;
>>> +} record_t;
>>> +
>>> +extern int record_debug;
>>> +extern record_t *record_list;
>>> +extern record_t *record_arch_list_head;
>>> +extern record_t *record_arch_list_tail;
>>> +extern struct regcache *record_regcache;
>>
>> Most of these things don't appear to be used anywhere else other
>> than in record.c. =A0Can you remove these declarations from the
>> public header, and make them static in record.c?
>>
>>> +
>>> +extern struct target_ops record_ops;
>>
>> Once you get rid of TARGET_IS_PROCESS_RECORD this doesn't
>> need to be public anymore.
>>
>>> +
>>> +extern int record_arch_list_add_reg (int num);
>>> +extern int record_arch_list_add_mem (CORE_ADDR addr, int len);
>>> +extern int record_arch_list_add_end (int need_dasm);
>>> +extern void record_message (struct gdbarch *gdbarch);
>>> +extern struct cleanup * record_gdb_operation_disable_set (void);
>>> +
>>> +#endif /* _RECORD_H_ */
>>>
>>
>> --
>> Pedro Alves
>>
>

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