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| author | Adhemerval Zanella Netto <adhemerval.zanella@linaro.org> | 2022-12-27 18:11:42 -0300 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2023-03-27 13:57:55 -0300 |
| commit | 88677348b4de73874ca7d5a47451f42880f65f07 (patch) | |
| tree | 9ebe22b88c2487331521737dfdf089f9e3e2439f /stdlib | |
| parent | e4d336f1ace7c7ca535f7f85485373752bc76ed5 (diff) | |
| download | glibc-88677348b4de73874ca7d5a47451f42880f65f07.zip glibc-88677348b4de73874ca7d5a47451f42880f65f07.tar.gz glibc-88677348b4de73874ca7d5a47451f42880f65f07.tar.bz2 | |
Move libc_freeres_ptrs and libc_subfreeres to hidden/weak functions
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>
Diffstat (limited to 'stdlib')
| -rw-r--r-- | stdlib/exit.c | 2 | ||||
| -rw-r--r-- | stdlib/fmtmsg.c | 3 | ||||
| -rw-r--r-- | stdlib/setenv.c | 3 |
3 files changed, 5 insertions, 3 deletions
diff --git a/stdlib/exit.c b/stdlib/exit.c index 1cd0bdf..d6c188b 100644 --- a/stdlib/exit.c +++ b/stdlib/exit.c @@ -20,7 +20,7 @@ #include <unistd.h> #include <pointer_guard.h> #include <libc-lock.h> -#include <libio/libioP.h> +#include <set-freeres.h> #include "exit.h" /* Initialize the flag that indicates exit function processing diff --git a/stdlib/fmtmsg.c b/stdlib/fmtmsg.c index b631ef3..3d9a0ed 100644 --- a/stdlib/fmtmsg.c +++ b/stdlib/fmtmsg.c @@ -361,7 +361,8 @@ __addseverity (int severity, const char *string) weak_alias (__addseverity, addseverity) -libc_freeres_fn (free_mem) +void +__libc_fmtmsg_freemem (void) { struct severity_info *runp = severity_list; diff --git a/stdlib/setenv.c b/stdlib/setenv.c index 2fa9e41..ba5257d 100644 --- a/stdlib/setenv.c +++ b/stdlib/setenv.c @@ -323,7 +323,8 @@ clearenv (void) return 0; } #ifdef _LIBC -libc_freeres_fn (free_mem) +void +__libc_setenv_freemem (void) { /* Remove all traces. */ clearenv (); |