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Move libc_freeres_ptrs and libc_subfreeres to hidden/weak functions

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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>
This commit is contained in:
Adhemerval Zanella Netto
2022-12-27 18:11:42 -03:00
committed by Adhemerval Zanella
parent e4d336f1ac
commit 88677348b4
90 changed files with 585 additions and 244 deletions
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6
stdio-common/reg-printf.c
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@ -21,11 +21,11 @@
#include <stddef.h>
#include <stdlib.h>
#include <libc-lock.h>
#include <set-freeres.h>
/* Array of functions indexed by format character. */
libc_freeres_ptr (printf_arginfo_size_function **__printf_arginfo_table)
attribute_hidden;
printf_arginfo_size_function **__printf_arginfo_table attribute_hidden;
printf_function **__printf_function_table attribute_hidden;
__libc_lock_define_initialized (static, lock)
@ -79,3 +79,5 @@ __register_printf_function (int spec, printf_function converter,
(printf_arginfo_size_function*) arginfo);
}
weak_alias (__register_printf_function, register_printf_function)
weak_alias (__printf_arginfo_table, __libc_reg_printf_freemem_ptr)