Re: Process record and replay checked in to main trunk

[Hui Zhu <teawater@gmail.com>]

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Hi Pierre,

I make a patch to fix this bug, but I don't have cygwin.

Could you please help me test this patch in cygwin?

Thanks,
Hui

On Fri, May 8, 2009 at 07:06, Pedro Alves <pedro@codesourcery.com> wrote:
> On Thursday 07 May 2009 23:43:13, Michael Snyder wrote:
>> Guessing it isn't implemented for 64 bit.
>
> I don't think that's the problem here.  Cygwin is 32-bit, and has 32-bit
> ints.
>
>> ../../purecvs/gdb/linux-record.c:397: warning: unsigned int format, uint32_t
>> arg
>
>> ../../purecvs/gdb/linux-record.c:629: warning: int format, uint32_t arg (arg
>
> Better use casts, or use plongest/pulongest/hex_string where appropriate?
>
>> Perhaps we should have a --disable-process-record config option?
>> If only for a back-up plan?
>
> I think that would be more work than fixing this properly.  :-)
>
>> ../../purecvs/gdb/linux-record.c:1636: error: `F_GETLK64' undeclared (first
>> use
>> in this function)
>
> There are a bunch of RECORD_* macros defined on top of linux-record.c
> to replace contants like these.  E.g., RECORD_Q_GETFMT.  Looks like
> this case was just missed.
>
> --
> Pedro Alves
>

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---
 i386-linux-tdep.c |   14 ++++++++++++++
 linux-record.c    |   28 +++++++++++++---------------
 linux-record.h    |    7 +++++++
 3 files changed, 34 insertions(+), 15 deletions(-)

--- a/i386-linux-tdep.c
+++ b/i386-linux-tdep.c
@@ -586,6 +586,14 @@ static int i386_linux_sc_reg_offset[] =
 #define I386_LINUX_RECORD_IOCTL_TIOCSHAYESESP		0x545F
 #define I386_LINUX_RECORD_IOCTL_FIOQSIZE		0x5460
 
+/* The values of the second argument of system call "sys_fcntl"
+   and "sys_fcntl64".  The values of these macros were obtained from
+   Linux Kernel source.  */
+#define I386_LINUX_RECORD_FCNTL_F_GETLK			5
+#define I386_LINUX_RECORD_FCNTL_F_GETLK64		12
+#define I386_LINUX_RECORD_FCNTL_F_SETLK64		13
+#define I386_LINUX_RECORD_FCNTL_F_SETLKW64		14
+
 static void
 i386_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
 {
@@ -781,6 +789,12 @@ i386_linux_init_abi (struct gdbarch_info
     I386_LINUX_RECORD_IOCTL_TIOCSHAYESESP;
   i386_linux_record_tdep.ioctl_FIOQSIZE = I386_LINUX_RECORD_IOCTL_FIOQSIZE;
 
+  i386_linux_record_tdep.fcntl_F_GETLK = I386_LINUX_RECORD_FCNTL_F_GETLK;
+  i386_linux_record_tdep.fcntl_F_GETLK64 = I386_LINUX_RECORD_FCNTL_F_GETLK64;
+  i386_linux_record_tdep.fcntl_F_SETLK64 = I386_LINUX_RECORD_FCNTL_F_SETLK64;
+  i386_linux_record_tdep.fcntl_F_SETLKW64 =
+    I386_LINUX_RECORD_FCNTL_F_SETLKW64;
+
   i386_linux_record_tdep.arg1 = I386_EBX_REGNUM;
   i386_linux_record_tdep.arg2 = I386_ECX_REGNUM;
   i386_linux_record_tdep.arg3 = I386_EDX_REGNUM;
--- a/linux-record.c
+++ b/linux-record.c
@@ -394,7 +394,7 @@ record_linux_system_call (int num, struc
 	{
 	  printf_unfiltered (_("Process record and replay target doesn't "
 			       "support ioctl request 0x%08x.\n"),
-			     tmpu32);
+			     (int)tmpu32);
 	  return 1;
 	}
       break;
@@ -404,7 +404,7 @@ record_linux_system_call (int num, struc
       /* XXX */
       regcache_raw_read (regcache, tdep->arg2, (gdb_byte *) & tmpu32);
     sys_fcntl:
-      if (tmpu32 == F_GETLK)
+      if (tmpu32 == tdep->fcntl_F_GETLK)
 	{
 	  regcache_raw_read (regcache, tdep->arg3,
 			     (gdb_byte *) & tmpu32);
@@ -626,7 +626,7 @@ record_linux_system_call (int num, struc
 		    "It will free the memory addr = 0x%s len = %d.  "
 		    "It will make record target get error.  "
 		    "Do you want to stop the program?"),
-		  paddr_nz (tmpu32), len);
+		  paddr_nz (tmpu32), (int)len);
 	target_terminal_inferior ();
 	if (q)
 	  return 1;
@@ -935,7 +935,7 @@ record_linux_system_call (int num, struc
 	default:
 	  printf_unfiltered (_("Process record and replay target "
 			       "doesn't support socketcall call 0x%08x\n"),
-			     tmpu32);
+			     (int)tmpu32);
 	  return -1;
 	  break;
 	}
@@ -1631,20 +1631,17 @@ record_linux_system_call (int num, struc
       /* sys_fcntl64 */
     case 221:
       regcache_raw_read (regcache, tdep->arg2, (gdb_byte *) & tmpu32);
-      switch (tmpu32)
-	{
-	case F_GETLK64:
+      if (tmpu32 == tdep->fcntl_F_GETLK64)
+        {
 	  regcache_raw_read (regcache, tdep->arg3,
 			     (gdb_byte *) & tmpu32);
 	  if (record_arch_list_add_mem (tmpu32, tdep->size_flock64))
 	    return -1;
-	  break;
-	case F_SETLK64:
-	case F_SETLKW64:
-	  break;
-	default:
+	}
+      else if (tmpu32 != tdep->fcntl_F_SETLK64
+	       && tmpu32 != tdep->fcntl_F_SETLKW64)
+        {
 	  goto sys_fcntl;
-	  break;
 	}
       break;
 
@@ -1786,7 +1783,8 @@ record_linux_system_call (int num, struc
 		fprintf_unfiltered (gdb_stdlog,
 				    "Process record: error reading memory "
 				    "at addr = 0x%s len = %d.\n",
-				    paddr_nz (tmpu32), nr * tdep->size_int);
+				    paddr_nz (tmpu32),
+				    (int)(nr * tdep->size_int));
 	      return -1;
 	    }
 	  for (i = 0; i < nr; i++)
@@ -2196,7 +2194,7 @@ record_linux_system_call (int num, struc
     default:
       printf_unfiltered (_("Process record and replay target doesn't "
 			   "support syscall number 0x%08x\n"),
-			 tmpu32);
+			 (int)tmpu32);
       return -1;
       break;
     }
--- a/linux-record.h
+++ b/linux-record.h
@@ -158,6 +158,13 @@ struct linux_record_tdep
   int ioctl_TIOCSHAYESESP;
   int ioctl_FIOQSIZE;
 
+  /* The values of the second argument of system call "sys_fcntl"
+     and "sys_fcntl64".  */
+  int fcntl_F_GETLK;
+  int fcntl_F_GETLK64;
+  int fcntl_F_SETLK64;
+  int fcntl_F_SETLKW64;
+
   /* The number of the registers that are used as the arguments of
      a system call.  */
   int arg1;