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Date: Thu, 16 Aug 2012 11:14:00 -0000
From: Gary Benson <gbenson@redhat.com>
To: Jan Kratochvil <jan.kratochvil@redhat.com>
Cc: gdb-patches@sourceware.org
Subject: Re: [RFA 4/4 take 2] Improved linker-debugger interface
Message-ID: <20120816111406.GA3467@redhat.com>
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References: <20120719110518.GE16185@redhat.com> <20120815172346.GA5696@host2.jankratochvil.net> <20120815174546.GA7270@host2.jankratochvil.net>
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Jan Kratochvil wrote:
> On Wed, 15 Aug 2012 19:23:46 +0200, Jan Kratochvil wrote:
> > (3)
> > There is some issue we already discussed off-list, in some cases (Fedora
> > Rawhide x86_64 with Fedora patched GDB) it breaks on
> > 	FAIL: gdb.base/break-dlmopen.exp: info sharedlibrary #5
> 
> reproduced it also with FSF GDB HEAD with the patch below.
> 
> Apparently the address 0x6020a0 is already freed/invalid that time,
> I guess it is more clear to you:
> 
> > namespace_update_full(lmid=0x1,debug_base=0x7ffff7ffd0f8,is_initial_ns=0
> > svr4_read_so_list(lm=0x6020a0,prev_lm=0x0)
> > lm=0x6020a0={next=0x602670,prev=0x0}
> > lm=0x602670={next=0x0,prev=0x0}
> > warning: Corrupted shared library list: 0x6020a0 != 0x0
> 
> diff --git a/gdb/testsuite/gdb.base/break-dlmopen.exp b/gdb/testsuite/gdb.base/break-dlmopen.exp
> index 52cd5ef..ebf9089 100644
> --- a/gdb/testsuite/gdb.base/break-dlmopen.exp
> +++ b/gdb/testsuite/gdb.base/break-dlmopen.exp
> @@ -33,7 +33,7 @@ if { [gdb_compile_shlib $srcfile_lib $binfile_lib \
>  }
>  
>  if { [prepare_for_testing $testfile.exp $testfile $srcfile \
> -	  [list additional_flags=-DSHLIB_NAME\=\"$binfile_lib\" libs=-ldl]] } {
> +	  [list additional_flags=-DSHLIB_NAME\=\"$binfile_lib\" libs=-ldl libs=-lmcheck]] } {
>      return -1
>  }

Thanks for this, I have it reproduced now and I'm looking into it.

Cheers,
Gary

-- 
http://gbenson.net/