Sorry I forget the patch.

On Tue, May 5, 2009 at 21:07, Hui Zhu <teawater@gmail.com> wrote:
> Hi guys,
>
> This patch will make linux-record can check if the sys_brk will
> release the memory or not.  If memory will be released, gdb will query
> to user.
>
> For example:
> cat m.c
> #include <sys/types.h>
> #include <stdio.h>
> #include <stdlib.h>
> #include <string.h>
> #include <unistd.h>
> #include <errno.h>
> #include <sys/stat.h>
> #include <fcntl.h>
> #include <stdint.h>
>
> int
> main(int argc,char *argv[],char *envp[])
> {
>        sbrk (10);
>        sbrk (-10);
>
>        return (0);
> }
>
> gdb m
> GNU gdb (GDB) 6.8.50.20090505-cvs
> Copyright (C) 2009 Free Software Foundation, Inc.
> License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
> This is free software: you are free to change and redistribute it.
> There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
> and "show warranty" for details.
> This GDB was configured as "i686-pc-linux-gnu".
> For bug reporting instructions, please see:
> <http://www.gnu.org/software/gdb/bugs/>...
> (gdb) start
> Temporary breakpoint 1 at 0x8048385: file m.c, line 14.
> Starting program: /home/teawater/gdb/m
>
> Temporary breakpoint 1, main (argc=<value optimized out>, argv=<value
> optimized out>,
>    envp=<value optimized out>) at m.c:14
> 14              sbrk (10);
> (gdb) record
> (gdb) n
> 15              sbrk (-10);
> (gdb)
> The next instruction is syscall brk.  It will release the memory that
> will cause process record target get error.  Do you want to stop the
> inferior?([y] or n)
> Process record: inferior program stopped.
>
> Program received signal SIGTRAP, Trace/breakpoint trap.
> 0xb7fe3405 in __kernel_vsyscall ()
>
>
> 2009-05-05  Hui Zhu  <teawater@gmail.com>
>
>        Add a architecture process record and replay reset interface
>        and i386 and i386-linux record and replay reset functions.
>
>        * gdbarch.sh (process_record_reset): This interface point to
>        the function that reset the architecture process record and
>        replay.
>        * record.c (record_open): Call process_record_reset.
>        * i386-tdep.c (i386_linux_record_reset): New function. Call
>        tdep interface "i386_record_reset".
>        (i386_gdbarch_init): Set "i386_linux_record_reset" to GDBARCH
>        "process_record_reset" interface.
>        * i386-tdep.h (gdbarch_tdep): New function pointer
>        i386_record_reset that point to the function that can reset
>        the process record.
>        * i386-linux-tdep.c (i386_linux_record_reset): New function.
>        Call record_linux_reset.
>        (i386_linux_init_abi): Set "i386_linux_record_reset" to
>        "i386_record_reset".
>
>        Check Linux sys_brk release memory in process record
>        and replay.
>
>        * linux-record.c (record_top_of_heap): New variable.
>        The current top of heap of inferior.
>        (record_linux_reset): New function.  The reset function of
>        Linux process record and replay.  It will reset the value
>        of record_top_of_heap.
>        (record_linux_system_call): Add the sys_brk check code.
>        If this sys_brk will release the memory, query to user.
>        * linux-record.h (record_linux_reset): New function extern.
>
>
> Thanks,
> Hui
>