[Bug gdb/17756] gdb find command returns bogus results and can't find the matched value.

["matt.street at gmail dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=17756

Matthew Street <matt.street at gmail dot com> changed:

           What    |Removed                     |Added
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                 CC|                            |matt.street at gmail dot com

--- Comment #2 from Matthew Street <matt.street at gmail dot com> ---
I just confirmed this with 7.9 from Ubuntu Precise 32. I also have confirmed it
with 7.4 installed on my mac with homebrew.

Short example, I can give my data if need be:
(gdb) info proc mapping
-snip-
0xbffdf000 0xc0000000    0x21000        0x0 [stack]

find.gdb:
break test
run
find /b 0xbffdf000, 0xc0000000, 0x00

$> gdb -x find.gdb ./a.out > find.log
warning: Unable to access target memory at 0xbfffc181, halting search

But 0xbfffc181 is accessible:
(gdb) x /b 0xbfffc181
0xbfffc181: 0

And a smaller search range works fine:

(gdb) find /b 0xbfffc181, 0xbfffc191, 0x00
0xbfffc181
0xbfffc182
0xbfffc183
0xbfffc184
0xbfffc185
0xbfffc186
0xbfffc187
0xbfffc188
0xbfffc189
0xbfffc18a
0xbfffc18b
0xbfffc18c
0xbfffc18d
0xbfffc18e
0xbfffc18f
0xbfffc190
0xbfffc191
17 patterns found.

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