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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 /login | |
| 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 'login')
| -rw-r--r-- | login/getutent.c | 5 | ||||
| -rw-r--r-- | login/getutid.c | 6 | ||||
| -rw-r--r-- | login/getutline.c | 5 |
3 files changed, 12 insertions, 4 deletions
diff --git a/login/getutent.c b/login/getutent.c index 7a49984..ed8b162 100644 --- a/login/getutent.c +++ b/login/getutent.c @@ -17,10 +17,11 @@ #include <stdlib.h> #include <utmp.h> +#include <set-freeres.h> /* Local buffer to store the result. */ -libc_freeres_ptr (static struct utmp *buffer); +static struct utmp *buffer; struct utmp * @@ -42,3 +43,5 @@ __getutent (void) } libc_hidden_def (__getutent) weak_alias (__getutent, getutent) + +weak_alias (buffer, __libc_getutent_freemem_ptr) diff --git a/login/getutid.c b/login/getutid.c index 7ecc93c..658fdc0 100644 --- a/login/getutid.c +++ b/login/getutid.c @@ -17,10 +17,10 @@ #include <stdlib.h> #include <utmp.h> - +#include <set-freeres.h> /* Local buffer to store the result. */ -libc_freeres_ptr (static struct utmp *buffer); +static struct utmp *buffer; struct utmp * __getutid (const struct utmp *id) @@ -40,3 +40,5 @@ __getutid (const struct utmp *id) } libc_hidden_def (__getutid) weak_alias (__getutid, getutid) + +weak_alias (buffer, __libc_getutid_freemem_ptr) diff --git a/login/getutline.c b/login/getutline.c index c9dcd22..a10c256 100644 --- a/login/getutline.c +++ b/login/getutline.c @@ -17,10 +17,11 @@ #include <stdlib.h> #include <utmp.h> +#include <set-freeres.h> /* Local buffer to store the result. */ -libc_freeres_ptr (static struct utmp *buffer); +static struct utmp *buffer; struct utmp * @@ -41,3 +42,5 @@ __getutline (const struct utmp *line) } libc_hidden_def (__getutline) weak_alias (__getutline, getutline) + +weak_alias (buffer, __libc_getutline_freemem_ptr) |