This is the sort of code that we get right once and never look at again.
Anyone reading this code is already likely in the middle of a debugging
nightmare, and then they have a wall of manual string construction and
an unfamiliar and idiosyncratic library to deal with. So, comment the
whole thing to try to make it clear what's going on.
In pursuit of the above, I've added return checks to some of the
libunwind calls, fixed the frame loop to not skip the "top" frame
(however unseful it may be), and fix a couple of calls to
spl_bt_u64_to_hex_str() which requested 18 digits instead of 16.
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Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Tino Reichardt <milky-zfs@mcmilk.de>
Signed-off-by: Rob Norris <robn@despairlabs.com>
Closes#16653
My eyes are going blurry looking at all those write calls. This is much
nicer.
Sponsored-by: https://despairlabs.com/sponsor/
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Tino Reichardt <milky-zfs@mcmilk.de>
Signed-off-by: Rob Norris <robn@despairlabs.com>
Close#16653
More useful stuff, especially when trying to follow a disassembly.
Sponsored-by: https://despairlabs.com/sponsor/
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Tino Reichardt <milky-zfs@mcmilk.de>
Signed-off-by: Rob Norris <robn@despairlabs.com>
Closes#16653
The __maybe_unused macro is defined in spl/sys/debug.h
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Martin Matuska <mm@FreeBSD.org>
Closes#16229
Mostly, try a lot harder to not allocate anything.
Sponsored-by: Klara, Inc.
Sponsored-by: Wasabi Technology, Inc.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Rob Norris <rob.norris@klarasystems.com>
Closes#16181
If it's going to be used directly by zdb/ztest, then it sort of doesn't
make sense to carry it with the assert code.
Sponsored-by: Klara, Inc.
Sponsored-by: Wasabi Technology, Inc.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Rob Norris <rob.norris@klarasystems.com>
Closes#16181
