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| author | Florian Weimer <fweimer@redhat.com> | 2021-02-03 08:55:13 -0300 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2021-02-08 14:10:42 -0300 |
| commit | e9fed2438a1ff475821864f906286dc58907f06b (patch) | |
| tree | 185b4a49e256ef312e65eafebf836ba17ea2ccef /htl | |
| parent | 7f61f785f16d22f185de77086c44a88218436cfb (diff) | |
| download | glibc-e9fed2438a1ff475821864f906286dc58907f06b.tar.gz glibc-e9fed2438a1ff475821864f906286dc58907f06b.tar.xz glibc-e9fed2438a1ff475821864f906286dc58907f06b.zip | |
linux: Require /dev/shm as the shared memory file system
Previously, glibc would pick an arbitrary tmpfs file system from /proc/mounts if /dev/shm was not available. This could lead to an unsuitable file system being picked for the backing storage for shm_open, sem_open, and related functions. This patch introduces a new function, __shm_get_name, which builds the file name under the appropriate (now hard-coded) directory. It is called from the various shm_* and sem_* function. Unlike the SHM_GET_NAME macro it replaces, the callers handle the return values and errno updates. shm-directory.c is moved directly into the posix subdirectory because it can be implemented directly using POSIX functionality. It resides in libc because it is needed by both librt and nptl/htl. In the sem_open implementation, tmpfname is initialized directly from a string constant. This happens to remove one alloca call. Checked on x86_64-linux-gnu.
Diffstat (limited to 'htl')
| -rw-r--r-- | htl/Makefile | 2 | ||||
| -rw-r--r-- | htl/Versions | 1 |
2 files changed, 0 insertions, 3 deletions
diff --git a/htl/Makefile b/htl/Makefile index 38d9f8c590..9adc95e07f 100644 --- a/htl/Makefile +++ b/htl/Makefile @@ -132,8 +132,6 @@ libpthread-routines := pt-attr pt-attr-destroy pt-attr-getdetachstate \ sem-post sem-timedwait sem-trywait sem_unlink \ sem-wait sem-waitfast \ \ - shm-directory \ - \ cancellation \ cthreads-compat \ herrno \ diff --git a/htl/Versions b/htl/Versions index 95496297e3..9506043c62 100644 --- a/htl/Versions +++ b/htl/Versions @@ -168,7 +168,6 @@ libpthread { GLIBC_PRIVATE { __pthread_initialize_minimal; - __shm_directory; __pthread_threads; __cthread_detach; |