[Bug gdb/18226] New: completion of extended-identifiers

[Bug gdb/18226] New: completion of extended-identifiers

[ratmice at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=18226

            Bug ID: 18226
           Summary: completion of extended-identifiers
           Product: gdb
           Version: HEAD
            Status: NEW
          Severity: minor
          Priority: P2
         Component: gdb
          Assignee: unassigned at sourceware dot org
          Reporter: ratmice at gmail dot com

when using an input string containing a unicode character, tab completion and
the complete command complete to non-existent symbols

echo "void foo\u0f00(){} void main(){}" | gcc -g --std c99
-fextended-identifiers -x c -; gdb -quiet  ./a.out -batch -ex 'complete b foo'
-ex 'complete b fooༀ'

The first complete works fine (because the input contains no
extended-identifiers)
b fooༀ

the 2nd completion starts appending all symbols to the input string
b fooༀ_DYNAMIC
b fooༀ_GLOBAL_OFFSET_TABLE_
<snip>
b fooༀfooༀ

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From: "ratmice at gmail dot com" <sourceware-bugzilla@sourceware.org>
To: gdb-prs@sourceware.org
Subject: [Bug gdb/18226] completion of extended-identifiers
Date: Thu, 09 Apr 2015 18:44:00 -0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=18226

--- Comment #1 from matt rice <ratmice at gmail dot com> ---
The same thing happens with filenames when using the break completer,to
complete filenames, but works OK for the 'file' completer.

echo "void main(){}" >fooༀ.c; gcc -g --std c99 -fextended-identifiers -x c
fooༀ.c; gdb -quiet  ./a.out -batch -ex 'complete file fooༀ' -ex 'complete break
fooༀ'
file fooༀ.c
break fooༀ.c
break fooༀ_DYNAMIC
break fooༀ_GLOBAL_OFFSET_TABLE_
<snip>

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From: "xdje42 at gmail dot com" <sourceware-bugzilla@sourceware.org>
To: gdb-prs@sourceware.org
Subject: [Bug corefiles/18227] New: can't modify memory in core file, even
 with --write
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https://sourceware.org/bugzilla/show_bug.cgi?id\x18227

            Bug ID: 18227
           Summary: can't modify memory in core file, even with --write
           Product: gdb
           Version: HEAD
            Status: NEW
          Severity: normal
          Priority: P2
         Component: corefiles
          Assignee: unassigned at sourceware dot org
          Reporter: xdje42 at gmail dot com

bash$ gdb segv.x64 core.12925
(gdb) set {int} $rsp = 1
Cannot access memory at address 0x7fffd66f9cd0

So far so good.

bash$ gdb --write segv.x64 core.12925
(gdb) p {int} $rsp
$1 = 0
(gdb) set {int} $rsp = 1
(gdb) p {int} $rsp
$2 = 0
(gdb)

Oops.
[If there's still a reason to reject the write
gdb should at least not be silent about it.]

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