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a64afc2252
libthread_db is loaded once GDB encounters libpthread, and at this
point, ld.so may not have been processed by GDB yet. As a result,
_rtld_global cannot be accessed by regular means from libthread_db.
To make this work until GDB can be fixed, acess _rtld_global through
a pointer stored in libpthread.
The new test does not reproduce bug 27744 with
--disable-hardcoded-path-in-tests, but is still a valid smoke test.
With --enable-hardcoded-path-in-tests, it is necessary to avoid
add-symbol-file because this can tickle a GDB bug.
Fixes commit 1daccf403b ("nptl: Move
stack list variables into _rtld_global").
Tested-by: Emil Velikov <emil.velikov@collabora.com>
47 lines
1.4 KiB
C
47 lines
1.4 KiB
C
/* Initialization function of thread debugger support library.
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Copyright (C) 1999-2021 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@redhat.com>, 1999.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include "thread_dbP.h"
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int __td_debug;
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td_err_e
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td_init (void)
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{
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/* XXX We have to figure out what has to be done. */
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LOG ("td_init");
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return TD_OK;
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}
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bool
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__td_ta_rtld_global (td_thragent_t *ta)
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{
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if (ta->ta_addr__rtld_global == 0)
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{
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psaddr_t rtldglobalp;
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if (DB_GET_VALUE (rtldglobalp, ta, __nptl_rtld_global, 0) == TD_OK)
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ta->ta_addr__rtld_global = rtldglobalp;
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else
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ta->ta_addr__rtld_global = (void *) -1;
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}
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return ta->ta_addr__rtld_global != (void *)-1;
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}
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