[Libunwind-devel] [PATCH] Add coredump unwinding support to libunwind

[Denys Vlasenko]

Hi,

For the needs of ABRT project, I need to extract backtrace
from a coredump. Currently we use gdb for this, but
we want to do it without gdb.

At first I attempted to just use remote unwinding feature
of libunwind for this, but quickly discovered that
I can't easily implement find_proc_info():
I would need to implement DWARF parsing.

Looks like the one relatively easy way forward is to extend
libunwind. This way I can use its internal DWARF parsing code.

This patch implements coredump unwinding using the ideas from
libunwind-ptrace.h API.

It adds a new directory under src, src/coredump/,
and results in one new header file (libunwind-coredump.h)
and one new library (libunwind-coredump.a) installed
by "make install".

src/coredump/ contains README file, *.c and *.h files,
and example-core-unwind.c which shows how the coredump
unwinding can be done.

The rest of the patch tweaks automake/cofigure machinery
to make src/coredump/* into build process.

The patch is run-tested on i386.

Due to its size of ~80kb, I send it bzip2ed to avoid
exceeding mailing list limit. Sorry about it...

Please review.
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vda

1.patch.bz2
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