Arun Sharma wrote:
On 5/2/07, *Andrew Cagney* <[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>> wrote:
Arun,
We have multi-platform, or remote, unwinding working. For instance,
x86-64 backtracing an i386, or even a 32-bit PowerPC unwinding an
x86-64. That is cool, way cool, something to celebrate! We've
finally
got this out of the "left as an exercise for the reader" bucket :-)
With this functionality working becomes possible to do cool stuff such
as display backtraces of a process as it alternatively exec's
32-bit and
then 64-bit programs.
Indeed. When you did this, I suppose you wrote your own accessors to
get to the memory of the remote process whose stack is being unwound?
Yes, that is what Nurdin noted earlier.
Our challenges now are:
- get frysk's existing local fixes to libunwind finally merged
Here, I'm referring to the other patches previously posted but not
reviewed. Perhaps we can work on that backlog?
To me Gget_unwind_table.c seems to be doing something different from
_UPT*. So I don't see why
libunwind/src/ptrace/_UPT_find_proc_info.c
should be patched. But if your goal is to get something like
Gget_unwind_table.c into libunwind, so remote unwinding would work out
of the box for many common cases, that would be a separate patchset.
I think David still should be the primary reviewer for that. I'd be
happy to review any x86/x86_64 specific bits.
I look forward to this.
Andrew
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