Checked and applied, thanks!
Sergey Bugaev, le ven. 19 mai 2023 17:47:24 +0300, a ecrit:
> Create a private hidden __hurd_thread_self alias, and use that one.
>
> Fixes 2f8ecb58a59eb82c43214d000842d99644a662d1
> "hurd: Fix x86_64 _hurd_tls_fork" and
> c7fcce38c83a2bb665ef5dc4981bf20c7e586123
> "hurd: Make sure to not use tcb->self"
>
> Reported-by: Joseph Myers <jos...@codesourcery.com>
> Signed-off-by: Sergey Bugaev <buga...@gmail.com>
> ---
>
> This should hopefully fix it (but please test!); I have only checked
> that it builds on x86_64-gnu, and that _Fork now calls
> __GI___hurd_thread_self without the PLT, and that libpthread.so only
> references __hurd_thread_self@GLIBC_PRIVATE.
>
> hurd/Versions | 1 +
> hurd/thread-self.c | 5 ++++-
> sysdeps/hurd/include/hurd.h | 3 +++
> sysdeps/mach/hurd/i386/htl/pt-setup.c | 2 +-
> sysdeps/mach/hurd/x86_64/htl/pt-setup.c | 2 +-
> sysdeps/mach/hurd/x86_64/tls.h | 7 +++++--
> 6 files changed, 15 insertions(+), 5 deletions(-)
>
> diff --git a/hurd/Versions b/hurd/Versions
> index 3d8b412d..439e8abf 100644
> --- a/hurd/Versions
> +++ b/hurd/Versions
> @@ -156,6 +156,7 @@ libc {
> __libc_open; __libc_close;
>
> # Used by libpthread.
> + __hurd_thread_self;
> _hurd_sigstate_set_global_rcv;
> _hurd_sigstate_lock;
> _hurd_sigstate_pending;
> diff --git a/hurd/thread-self.c b/hurd/thread-self.c
> index f3718165..af013503 100644
> --- a/hurd/thread-self.c
> +++ b/hurd/thread-self.c
> @@ -19,7 +19,10 @@
> #include <hurd/signal.h>
>
> thread_t
> -hurd_thread_self (void)
> +__hurd_thread_self (void)
> {
> return _hurd_self_sigstate ()->thread;
> }
> +
> +libc_hidden_def (__hurd_thread_self)
> +weak_alias (__hurd_thread_self, hurd_thread_self)
> diff --git a/sysdeps/hurd/include/hurd.h b/sysdeps/hurd/include/hurd.h
> index 7da9af26..5d904e0e 100644
> --- a/sysdeps/hurd/include/hurd.h
> +++ b/sysdeps/hurd/include/hurd.h
> @@ -11,5 +11,8 @@ void _hurd_libc_proc_init (char **argv);
> libc_hidden_proto (_hurd_exec_paths)
> libc_hidden_proto (_hurd_init)
> libc_hidden_proto (_hurd_libc_proc_init)
> +
> +extern thread_t __hurd_thread_self (void);
> +libc_hidden_proto (__hurd_thread_self)
> #endif
> #endif
> diff --git a/sysdeps/mach/hurd/i386/htl/pt-setup.c
> b/sysdeps/mach/hurd/i386/htl/pt-setup.c
> index ba108b96..27e5c98b 100644
> --- a/sysdeps/mach/hurd/i386/htl/pt-setup.c
> +++ b/sysdeps/mach/hurd/i386/htl/pt-setup.c
> @@ -79,7 +79,7 @@ __pthread_setup (struct __pthread *thread,
> {
> error_t err;
>
> - if (thread->kernel_thread == hurd_thread_self ())
> + if (thread->kernel_thread == __hurd_thread_self ())
> /* Fix up the TCB for the main thread. The C library has already
> installed a TCB, which we want to keep using. This TCB must not
> be freed so don't register it in the thread structure. On the
> diff --git a/sysdeps/mach/hurd/x86_64/htl/pt-setup.c
> b/sysdeps/mach/hurd/x86_64/htl/pt-setup.c
> index 7dc62912..8eebaf97 100644
> --- a/sysdeps/mach/hurd/x86_64/htl/pt-setup.c
> +++ b/sysdeps/mach/hurd/x86_64/htl/pt-setup.c
> @@ -56,7 +56,7 @@ __pthread_setup (struct __pthread *thread,
> struct i386_thread_state state;
> struct i386_fsgs_base_state fsgs_state;
>
> - if (thread->kernel_thread == hurd_thread_self ())
> + if (thread->kernel_thread == __hurd_thread_self ())
> /* Fix up the TCB for the main thread. The C library has already
> installed a TCB, which we want to keep using. This TCB must not
> be freed so don't register it in the thread structure. On the
> diff --git a/sysdeps/mach/hurd/x86_64/tls.h b/sysdeps/mach/hurd/x86_64/tls.h
> index 468f703f..a5a49a47 100644
> --- a/sysdeps/mach/hurd/x86_64/tls.h
> +++ b/sysdeps/mach/hurd/x86_64/tls.h
> @@ -132,6 +132,10 @@ THREAD_TCB (thread_t thread,
> ((descr)->pointer_guard \
> = THREAD_GETMEM (THREAD_SELF, pointer_guard))
>
> +/* From hurd.h, reproduced here to avoid a circular include. */
> +extern thread_t __hurd_thread_self (void);
> +libc_hidden_proto (__hurd_thread_self)
> +
> /* Set up TLS in the new thread of a fork child, copying from the original.
> */
> static inline kern_return_t __attribute__ ((unused))
> _hurd_tls_fork (thread_t child, thread_t orig,
> @@ -141,8 +145,7 @@ _hurd_tls_fork (thread_t child, thread_t orig,
> struct i386_fsgs_base_state state;
> mach_msg_type_number_t state_count = i386_FSGS_BASE_STATE_COUNT;
>
> - extern thread_t hurd_thread_self (void);
> - if (orig != hurd_thread_self ())
> + if (orig != __hurd_thread_self ())
> {
> err = __thread_get_state (orig, i386_FSGS_BASE_STATE,
> (thread_state_t) &state,
> --
> 2.40.1
>
--
Samuel
---
Pour une évaluation indépendante, transparente et rigoureuse !
Je soutiens la Commission d'Évaluation de l'Inria.
