Re: git: 860c4d94ac46 - main - rtld: add LD_NO_DL_ITERATE_PHDR_AFTER_FORK env var

On Mon, 29 Jul 2024 23:58:59 GMT
Konstantin Belousov <kib@FreeBSD.org> wrote:

> The branch main has been updated by kib:
>
> URL: https://cgit.FreeBSD.org/src/commit/?id=860c4d94ac46cee35a678cf3c9cdbd437dfed75e
>
> commit 860c4d94ac46cee35a678cf3c9cdbd437dfed75e
> Author:     Konstantin Belousov <kib@FreeBSD.org>
> AuthorDate: 2024-07-17 04:05:33 +0000
> Commit:     Konstantin Belousov <kib@FreeBSD.org>
> CommitDate: 2024-07-29 23:57:33 +0000
>
>     rtld: add LD_NO_DL_ITERATE_PHDR_AFTER_FORK env var
>
>     which makes threaded fork ignore the phdr rtld lock, in particular
>     allowing the dl_iterate_phdr() to block in callback.  The cost is that
>     the image started in this mode cannot use dl_iterate_phdr() after fork.
>
>     PR:     280318
>     Sponsored by:   The FreeBSD Foundation
>     MFC after:      1 week
> ---
>  libexec/rtld-elf/rtld.1      | 10 +++++++++-
>  libexec/rtld-elf/rtld.c      |  1 +
>  libexec/rtld-elf/rtld.h      |  1 +
>  libexec/rtld-elf/rtld_lock.c |  7 +++++--
>  4 files changed, 16 insertions(+), 3 deletions(-)
>
> diff --git a/libexec/rtld-elf/rtld.1 b/libexec/rtld-elf/rtld.1
> index 992138b1ffc0..31e046a5cdc4 100644
> --- a/libexec/rtld-elf/rtld.1
> +++ b/libexec/rtld-elf/rtld.1
> @@ -26,7 +26,7 @@
>  .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
>  .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>  .\"
> -.Dd April 28, 2024
> +.Dd July 24, 2025 <== SHOULD BE 2024
>  .Dt RTLD 1

[SNIP]

--
Gary Jennejohn