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 10:17:44 -0400

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 Can you try undef'ing all the HAVE_ALLOCA?
 
 [10:15am] 224>find . -name \*.h -exec grep HAVE_ALLOCA {} + | grep alpha
 ./libbfd/arch/alpha/config.h:/* #undef HAVE_ALLOCA_H */
 ./libgdb/arch/alpha/config.h:#define HAVE_ALLOCA 1
 ./libgdb/arch/alpha/config.h:/* #undef HAVE_ALLOCA_H */
 ./libiberty/arch/alpha/config.h:/* #undef HAVE_ALLOCA_H */
 ./libgdbsupport/arch/alpha/gdbsupport/config.h:#define HAVE_ALLOCA 1
 ./libgdbsupport/arch/alpha/gdbsupport/config.h:/* #undef HAVE_ALLOCA_H =
 */
 ./libgnulib/arch/alpha/gnulib/config.h:#define HAVE_ALLOCA 1
 ./libgnulib/arch/alpha/gnulib/config.h:/* #undef HAVE_ALLOCA_H */
 
 christos
 
 > On May 7, 2021, at 10:05 AM, Christos Zoulas <christos%zoulas.com@localhost> =
 wrote:
 >=20
 > The following reply was made to PR toolchain/56153; it has been noted =
 by GNATS.
 >=20
 > 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
 >=20
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 >=20
 >=20
 >> =3D20
 >> Hmm, (1)-(3) below results in the same crash for ``gdb cat =
 cat.core''.
 >> =3D20
 >> (1) Replace libc with that with old jemalloc by LD_LIBRARY_PATH
 >> (2) Set LD_PRELOAD=3D3D/usr/lib/libbsdmalloc.so
 >> (3) Set LD_PRELOAD=3D3D/usr/lib/libgnumalloc.so
 >=20
 > By the same crash you mean in the same free call or the same jemalloc =
 =3D
 > stack trace?
 >=20
 >> =3D20
 >> With libc built with -DJEMALLOC_DEBUG:
 >> =3D20
 >> ----
 >> $ LD_LIBRARY_PATH=3D3D~/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>: =3D
 > /usr/src/external/bsd/jemalloc/lib/../dist/src/rtree.c:205: Failed =3D
 > assertion: "!dependent || leaf !=3D3D NULL"
 >> [1]   Abort trap (core dumped) LD_LIBRARY_PATH=3D3D~/jemalloc_debug =
 gdb =3D
 > cat cat.core
 >> =3D20
 >=20
 > That seems like the tree data structure is corrupted? Multiple frees? =
 =3D
 > But it should have caught that.
 >=20
 > christos
 >=20
 >=20
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