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88677348b4
They are both used by __libc_freeres to free all library malloc allocated resources to help tooling like mtrace or valgrind with memory leak tracking. The current scheme uses assembly markers and linker script entries to consolidate the free routine function pointers in the RELRO segment and to be freed buffers in BSS. This patch changes it to use specific free functions for libc_freeres_ptrs buffers and call the function pointer array directly with call_function_static_weak. It allows the removal of both the internal macros and the linker script sections. Checked on x86_64-linux-gnu, i686-linux-gnu, and aarch64-linux-gnu. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
43 lines
1.7 KiB
C
43 lines
1.7 KiB
C
/* Free resources stored in thread-local variables on thread exit.
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Copyright (C) 2003-2023 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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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 <libc-internal.h>
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#include <malloc-internal.h>
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#include <set-freeres.h>
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#include <shlib-compat.h>
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#include <tls-internal.h>
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/* Thread shutdown function. Note that this function must be called
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for threads during shutdown for correctness reasons. Unlike
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__libc_freeres, skipping calls to it is not a valid optimization.
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This is called directly from pthread_create as the thread exits. */
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void
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__libc_thread_freeres (void)
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{
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#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_32)
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__rpc_thread_destroy ();
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#endif
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call_function_static_weak (__res_thread_freeres);
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call_function_static_weak (__glibc_tls_internal_free);
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call_function_static_weak (__libc_dlerror_result_free);
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/* This should come last because it shuts down malloc for this
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thread and the other shutdown functions might well call free. */
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call_function_static_weak (__malloc_arena_thread_freeres);
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}
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