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From: mec.gnu@mindspring.com (Michael Elizabeth Chastain)
To: gdb@sources.redhat.com, jjohnstn@redhat.com
Subject: regression with huge integer
Date: Mon, 23 Feb 2004 19:55:00 -0000	[thread overview]
Message-ID: <20040223195548.B7CDD4B104@berman.michael-chastain.com> (raw)

gdb.stabs/weird.def has this huge integer:

  # 256-bit integer.  The point is obviously not that GDB should have a
  # special case for this size, but that an integer of any size should
  # work (at least for printing in hex, not necessarily for arithmetic.  
  .stabs "int256var:G203=bu32;0;256;", N_GSYM,0,0, 0
  # The value is palindromic, so it works whether words are big or little
  # endian.  
  .globl int256var
  .data
  .align_it
       int256var:
  .long 42
       .long 0x2b, 0x2c, 0x2d, 0x2d, 0x2c, 0x2b, 0x2a

gdb 6.0 can print this just fine:

  (gdb) print int256var
  $1 = 0x0000002a0000002b0000002c0000002d0000002d0000002c0000002b0000002a
  (gdb) print /x int256var
  $2 = 0x0000002a0000002b0000002c0000002d0000002d0000002c0000002b0000002a

But with the recent simplification to print_scalar_formatted, gdb HEAD says:

  (gdb) print int256var
  $1 = 0x0000002a0000002b0000002c0000002d0000002d0000002c0000002b0000002a
  (gdb) print /x int256var
  $2 = That operation is not available on integers of more than 8 bytes.

This causes a regression in the test results.

I would like to just accept this output and change the test script.
Specifically, in gdb.stabs/weird.exp:

	  # This big number needs to be kept as one piece
  - 	gdb_test "p/x int256var" " = 0x0*2a0000002b0000002c0000002d0000002d0000002c0000002b0000002a" "print very big integer"
  + 	gdb_test "print int256var" " = 0x0*2a0000002b0000002c0000002d0000002d0000002c0000002b0000002a" "print very big integer"
    
Is this a good idea?  Or should I file a bug that "print /x" does not work
in this case?

Michael C


             reply	other threads:[~2004-02-23 19:55 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-02-23 19:55 Michael Elizabeth Chastain [this message]
2004-02-23 20:44 ` Andreas Schwab
2004-02-23 21:27   ` Mark Kettenis
2004-02-23 21:31 ` Andrew Cagney
2004-02-23 22:25   ` Jeff Johnston
2004-02-26 22:16     ` [RFA]: Patch for " Jeff Johnston
2004-02-26 23:09       ` Andrew Cagney
2004-02-26 23:17       ` Daniel Jacobowitz
2004-02-26 23:48         ` Jeff Johnston

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