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From: "simark at simark dot ca" <sourceware-bugzilla@sourceware.org>
To: gdb-prs@sourceware.org
Subject: [Bug backtrace/27147] [GNU/Linux, sparc64] GDB is unable to print
 full stack trace (got "previous frame inner to this frame" errors)
Date: Mon, 04 Jan 2021 18:58:28 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D27147

Simon Marchi <simark at simark dot ca> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2021-01-04
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW
   Target Milestone|---                         |10.2

--- Comment #3 from Simon Marchi <simark at simark dot ca> ---
Ok, I was able to reproduce this on gcc102, on the gcc compile farm.  It
bisected to 5b6d1e4fa4fc ("Multi-target support").

At 5b6d1e4fa4fc:

$ ./binutils-gdb/gdb/gdb --data-directory binutils-gdb/gdb/data-directory
-batch a.out -ex "b puts" -ex "r" -ex "bt"
Breakpoint 1 at 0x1021a0

Breakpoint 1, 0xffff80010019c63c in puts () from
/lib/sparc64-linux-gnu/libc.so.6
#0  0xffff80010019c63c in puts () from /lib/sparc64-linux-gnu/libc.so.6
#1  0x000007feffdee2d9 in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

At 5b6d1e4fa4fc^:

./binutils-gdb/gdb/gdb --data-directory binutils-gdb/gdb/data-directory -ba=
tch
a.out -ex "b puts" -ex "r" -ex "bt"
Breakpoint 1 at 0x1021a0

Breakpoint 1, 0xffff80010019c63c in puts () from
/lib/sparc64-linux-gnu/libc.so.6
#0  0xffff80010019c63c in puts () from /lib/sparc64-linux-gnu/libc.so.6
#1  0x00000100000007f8 in hello () at test.c:4
#2  0x0000010000000810 in main () at test.c:8

Since this is a 9 -> 10 regression, I'll mark it with the 10.2 milestone.  I
don't plan to look more into it at the moment.

Note: I tried to generate a core file, to be able to analyze further on my
local machine, but I wasn't able to load it.  GDB doesn't find the register=
s in
the core file:

  warning: Couldn't find general-purpose registers in core file.

--=20
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