[PATCH] Support gzip compressed exec and core files in gdb

[Michael Eager]

On 03/12/15 10:11, Jan Kratochvil wrote:
> On Thu, 12 Mar 2015 17:58:02 +0100, Michael Eager wrote:
>> I misspoke/misremembered.  It isn't exec_close() which closes the
>> file, it is bfd_cache_close_all().  The bfd is not closed, only
>> the file.
>
> This is problematic, I have already posted a pending patch for it:
> 	[patch] Do not close BFDs, breaking deleted inferior shlibs
> 	https://sourceware.org/ml/gdb-patches/2015-02/msg00367.html

Thanks.  I'll see if this eliminates the need for the BFD patch.

>> Allowing an opened fd to be passed into BFD makes
>> doing the decompression in BFD problematic, since BFD doesn't
>> know where the opened file was found, and the decompress libraries
>> (at least gzopen()) expects a path, not an opened fd.
>
> One can readlink(/proc/self/fd/%d) although I haven't checked now how exactly
> to use it.

This won't tell what flags were used to open the file,
so that the same flags can be used on the decompressed file.

-- 
Michael Eager	 eager@eagercon.com
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