[RFA/RFC] Prec multi-thread support [2/4] arch support

Hui Zhu teawater@gmail.com
Tue Dec 8 05:11:00 GMT 2009


Now, the fp insn patch and sse patch are running.  If you don't mind,
I suggest let them go first.  :)

Thanks,
Hui

On Tue, Dec 8, 2009 at 02:59, Michael Snyder <msnyder@vmware.com> wrote:
> Hui Zhu wrote:
>>
>> 1. In record_linux_system_call gdb_sys_clone, I set record_step to 0.
>> Then the record target will let inferior continue until to a
>> breakpoint.  Most of time, record just let inferior step.  But
>> sys_clone is very special.  It cannot work OK with
>> PTRACE_SINGLESTEP.(It make me hang this patch a log of months.)
>>
>> 2. Add new argument "addr" that point to the next code that need to be
>> analyzed to linux syscall record function "record_linux_system_call".
>
> Here is your stylistic review:
>
>> 2009-11-25  Hui Zhu  <teawater@gmail.com>
>>
>>        * amd64-linux-tdep.c (amd64_linux_syscall_record): Add new
>>        argument "addr".
>>        * i386-linux-tdep.c (i386_linux_intx80_sysenter_record): Ditto.
>>        * i386-tdep.c (i386_record_lea_modrm): Add "if (record_debug)"
>>        to segment register warning.
>>        (i386_process_record): Ditto.  Add new argument "addr" when
>>        call i386_intx80_record, i386_sysenter_record and
>>        i386_syscall_record.
>>        * i386-tdep.h (gdbarch_tdep): Add new argument "addr" when
>>        call i386_intx80_record, i386_sysenter_record and
>>        i386_syscall_record.
>>        * linux-record.c (inferior.h): New include.
>>        (record_linux_system_call): Add new argument "addr".
>>        Update code for gdb_sys_clone.
>>        * linux-record.h (record_linux_system_call): Add new argument
>>        "addr".
>>
>> ---
>>  amd64-linux-tdep.c |    4 ++--
>>  i386-linux-tdep.c  |    4 ++--
>>  i386-tdep.c        |   52
>> +++++++++++++++++++++++++++++-----------------------
>>  i386-tdep.h        |    6 +++---
>>  linux-record.c     |   13 +++++++++----
>>  linux-record.h     |    2 +-
>>  6 files changed, 46 insertions(+), 35 deletions(-)
>>
>> --- a/amd64-linux-tdep.c
>> +++ b/amd64-linux-tdep.c
>> @@ -1155,7 +1155,7 @@ static struct linux_record_tdep amd64_li
>>  #define RECORD_ARCH_GET_GS     0x1004
>>
>>  static int
>> -amd64_linux_syscall_record (struct regcache *regcache)
>> +amd64_linux_syscall_record (struct regcache *regcache, CORE_ADDR addr)
>>  {
>>   int ret;
>>   ULONGEST syscall_native;
>> @@ -1205,7 +1205,7 @@ amd64_linux_syscall_record (struct regca
>>     }
>>   else
>>     {
>> -      ret = record_linux_system_call (syscall_gdb, regcache,
>> +      ret = record_linux_system_call (syscall_gdb, addr, regcache,
>>                                       &amd64_linux_record_tdep);
>>       if (ret)
>>         return ret;
>> --- a/i386-linux-tdep.c
>> +++ b/i386-linux-tdep.c
>> @@ -411,7 +411,7 @@ i386_canonicalize_syscall (int syscall)
>>  static struct linux_record_tdep i386_linux_record_tdep;
>>
>>  static int
>> -i386_linux_intx80_sysenter_record (struct regcache *regcache)
>> +i386_linux_intx80_sysenter_record (struct regcache *regcache, CORE_ADDR
>> addr)
>
> Break up long line.
>
>>  {
>>   int ret;
>>   LONGEST syscall_native;
>> @@ -437,7 +437,7 @@ i386_linux_intx80_sysenter_record (struc
>>      return 0;
>>    }
>>
>> -  ret = record_linux_system_call (syscall_gdb, regcache,
>> +  ret = record_linux_system_call (syscall_gdb, addr, regcache,
>>                                  &i386_linux_record_tdep);
>>   if (ret)
>>     return ret;
>> --- a/i386-tdep.c
>> +++ b/i386-tdep.c
>> @@ -3160,10 +3160,11 @@ i386_record_lea_modrm (struct i386_recor
>>
>>   if (irp->override >= 0)
>>     {
>> -      warning (_("Process record ignores the memory change "
>> -                 "of instruction at address %s because it "
>> -                 "can't get the value of the segment register."),
>> -               paddress (gdbarch, irp->orig_addr));
>> +      if (record_debug)
>> +        warning (_("Process record ignores the memory change "
>> +                   "of instruction at address %s because it "
>> +                   "can't get the value of the segment register."),
>> +                 paddress (gdbarch, irp->orig_addr));
>>       return 0;
>>     }
>>
>> @@ -4042,11 +4043,12 @@ reswitch:
>>     case 0xa3:
>>       if (ir.override >= 0)
>>         {
>> -         warning (_("Process record ignores the memory change "
>> -                     "of instruction at address %s because "
>> -                     "it can't get the value of the segment "
>> -                     "register."),
>> -                   paddress (gdbarch, ir.orig_addr));
>> +          if (record_debug)
>> +           warning (_("Process record ignores the memory change "
>> +                       "of instruction at address %s because "
>> +                       "it can't get the value of the segment "
>> +                       "register."),
>> +                     paddress (gdbarch, ir.orig_addr));
>>        }
>>       else
>>        {
>> @@ -4467,11 +4469,12 @@ reswitch:
>>           if (ir.aflag && (es != ds))
>>             {
>>               /* addr += ((uint32_t) read_register (I386_ES_REGNUM)) << 4;
>> */
>> -              warning (_("Process record ignores the memory "
>> -                         "change of instruction at address %s "
>> -                         "because it can't get the value of the "
>> -                         "ES segment register."),
>> -                       paddress (gdbarch, ir.orig_addr));
>> +              if (record_debug)
>> +                warning (_("Process record ignores the memory "
>> +                           "change of instruction at address %s "
>> +                           "because it can't get the value of the "
>> +                           "ES segment register."),
>> +                         paddress (gdbarch, ir.orig_addr));
>>             }
>>           else
>>             {
>> @@ -4872,7 +4875,7 @@ reswitch:
>>            ir.addr -= 2;
>>            goto no_support;
>>          }
>> -       ret = gdbarch_tdep (gdbarch)->i386_intx80_record (ir.regcache);
>> +       ret = gdbarch_tdep (gdbarch)->i386_intx80_record (ir.regcache,
>> ir.addr);
>
> Break up long line.
>
>>        if (ret)
>>          return ret;
>>       }
>> @@ -4974,7 +4977,8 @@ reswitch:
>>            ir.addr -= 2;
>>            goto no_support;
>>          }
>> -       ret = gdbarch_tdep (gdbarch)->i386_sysenter_record (ir.regcache);
>> +       ret = gdbarch_tdep (gdbarch)->i386_sysenter_record (ir.regcache,
>> +                                                            ir.addr);
>>        if (ret)
>>          return ret;
>>       }
>> @@ -4999,7 +5003,8 @@ reswitch:
>>            ir.addr -= 2;
>>            goto no_support;
>>          }
>> -       ret = gdbarch_tdep (gdbarch)->i386_syscall_record (ir.regcache);
>> +       ret = gdbarch_tdep (gdbarch)->i386_syscall_record (ir.regcache,
>> +                                                           ir.addr);
>>        if (ret)
>>          return ret;
>>       }
>> @@ -5135,12 +5140,13 @@ reswitch:
>>              /* sidt */
>>              if (ir.override >= 0)
>>                {
>> -                 warning (_("Process record ignores the memory "
>> -                             "change of instruction at "
>> -                             "address %s because it can't get "
>> -                             "the value of the segment "
>> -                             "register."),
>> -                           paddress (gdbarch, ir.orig_addr));
>> +                  if (record_debug)
>> +                   warning (_("Process record ignores the memory "
>> +                               "change of instruction at "
>> +                               "address %s because it can't get "
>> +                               "the value of the segment "
>> +                               "register."),
>> +                             paddress (gdbarch, ir.orig_addr));
>>                }
>>              else
>>                {
>> --- a/i386-tdep.h
>> +++ b/i386-tdep.h
>> @@ -115,11 +115,11 @@ struct gdbarch_tdep
>>      in GDB is not same as I386 instructions.  */
>>   const int *record_regmap;
>>   /* Parse intx80 args.  */
>> -  int (*i386_intx80_record) (struct regcache *regcache);
>> +  int (*i386_intx80_record) (struct regcache *regcache, CORE_ADDR addr);
>>   /* Parse sysenter args.  */
>> -  int (*i386_sysenter_record) (struct regcache *regcache);
>> +  int (*i386_sysenter_record) (struct regcache *regcache, CORE_ADDR
>> addr);
>>   /* Parse syscall args.  */
>> -  int (*i386_syscall_record) (struct regcache *regcache);
>> +  int (*i386_syscall_record) (struct regcache *regcache, CORE_ADDR addr);
>>  };
>>
>>  /* Floating-point registers.  */
>> --- a/linux-record.c
>> +++ b/linux-record.c
>> @@ -21,6 +21,7 @@
>>  #include "target.h"
>>  #include "gdbtypes.h"
>>  #include "regcache.h"
>> +#include "inferior.h"
>>  #include "record.h"
>>  #include "linux-record.h"
>>
>> @@ -222,7 +223,7 @@ record_linux_msghdr (struct regcache *re
>>    Return -1 if something wrong.  */
>>
>>  int
>> -record_linux_system_call (enum gdb_syscall syscall,
>> +record_linux_system_call (enum gdb_syscall syscall, CORE_ADDR addr,
>>                          struct regcache *regcache,
>>                           struct linux_record_tdep *tdep)
>>  {
>> @@ -242,8 +243,9 @@ record_linux_system_call (enum gdb_sysca
>>         int q;
>>         target_terminal_ours ();
>>         q = yquery (_("The next instruction is syscall exit.  "
>> -                      "It will make the program exit.  "
>> -                      "Do you want to stop the program?"));
>> +                      "It will make the thread %s exit.  "
>> +                      "Do you want to stop the program?"),
>> +                    target_pid_to_str (inferior_ptid));
>>         target_terminal_inferior ();
>>         if (q)
>>           return 1;
>> @@ -1209,10 +1211,13 @@ record_linux_system_call (enum gdb_sysca
>>
>>     case gdb_sys_fsync:
>>     case gdb_sys_sigreturn:
>> -    case gdb_sys_clone:
>>     case gdb_sys_setdomainname:
>>       break;
>>
>> +    case gdb_sys_clone:
>> +      record_step = 0;
>> +      break;
>> +
>>     case gdb_sys_newuname:
>>       regcache_raw_read_unsigned (regcache, tdep->arg1, &tmpulongest);
>>       if (record_arch_list_add_mem ((CORE_ADDR) tmpulongest,
>> --- a/linux-record.h
>> +++ b/linux-record.h
>> @@ -534,7 +534,7 @@ enum gdb_syscall {
>>
>>  /* Record a linux syscall.  */
>>
>> -extern int record_linux_system_call (enum gdb_syscall num,
>> +extern int record_linux_system_call (enum gdb_syscall num, CORE_ADDR
>> addr,
>
> Break up long line.
>
>>                                     struct regcache *regcache,
>>                                     struct linux_record_tdep *tdep);
>>  #endif /* _LINUX_RECORD_H_ */
>
>



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