Re: toolchain/56153: gdb is broken for alpha

[Christos Zoulas <christos%zoulas.com@localhost>]

The following reply was made to PR toolchain/56153; it has been noted by GNATS.

From: Christos Zoulas <christos%zoulas.com@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: toolchain-manager%netbsd.org@localhost,
 gnats-admin%netbsd.org@localhost,
 netbsd-bugs%netbsd.org@localhost,
 rokuyama.rk%gmail.com@localhost
Subject: Re: toolchain/56153: gdb is broken for alpha
Date: Fri, 7 May 2021 10:03:39 -0400

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 >=20
 > Hmm, (1)-(3) below results in the same crash for ``gdb cat cat.core''.
 >=20
 > (1) Replace libc with that with old jemalloc by LD_LIBRARY_PATH
 > (2) Set LD_PRELOAD=3D/usr/lib/libbsdmalloc.so
 > (3) Set LD_PRELOAD=3D/usr/lib/libgnumalloc.so
 
 By the same crash you mean in the same free call or the same jemalloc =
 stack trace?
 
 >=20
 > With libc built with -DJEMALLOC_DEBUG:
 >=20
 > ----
 > $ LD_LIBRARY_PATH=3D~/jemalloc_debug gdb cat cat.core
 > GNU gdb (GDB) 11.0.50.20200914-git
 > ...(snip)...
 > Reading symbols from cat...
 > Reading symbols from /usr/libdata/debug//bin/cat.debug...
 > [New process 18637]
 > <jemalloc>: =
 /usr/src/external/bsd/jemalloc/lib/../dist/src/rtree.c:205: Failed =
 assertion: "!dependent || leaf !=3D NULL"
 > [1]   Abort trap (core dumped) LD_LIBRARY_PATH=3D~/jemalloc_debug gdb =
 cat cat.core
 >=20
 
 That seems like the tree data structure is corrupted? Multiple frees? =
 But it should have caught that.
 
 christos
 
 
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