Rich Felker
060ed93673
with async cancellation enabled, pthread_cancel(pthread_self()) deadlocked due to pthread_kill holding killlock which is needed by pthread_exit. this could be solved by making pthread_kill block signals around the critical section, at least when the target thread is itself, but the issue only arises for cancellation, and otherwise would just be imposing unnecessary cost. instead just have pthread_cancel explicitly check for async self-cancellation and call pthread_exit(PTHREAD_CANCELED) directly rather than going through the signal machinery.
musl libc
musl, pronounced like the word "mussel", is an MIT-licensed
implementation of the standard C library targetting the Linux syscall
API, suitable for use in a wide range of deployment environments. musl
offers efficient static and dynamic linking support, lightweight code
and low runtime overhead, strong fail-safe guarantees under correct
usage, and correctness in the sense of standards conformance and
safety. musl is built on the principle that these goals are best
achieved through simple code that is easy to understand and maintain.
The 1.1 release series for musl features coverage for all interfaces
defined in ISO C99 and POSIX 2008 base, along with a number of
non-standardized interfaces for compatibility with Linux, BSD, and
glibc functionality.
For basic installation instructions, see the included INSTALL file.
Information on full musl-targeted compiler toolchains, system
bootstrapping, and Linux distributions built on musl can be found on
the project website:
http://www.musl-libc.org/