| commit | 78ed8bdf4f13e7f5d8eef77c12fbb030fdbdafe0 | |
| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | |
| Wed, 1 Nov 2023 12:56:05 +0000 (1 09:56 -0300) | ||
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | |
| Tue, 7 Nov 2023 13:27:20 +0000 (7 10:27 -0300) | ||
| tree | 11eb67f745b6a4142c44e486fba71e74e655f864 | treesnapshot (tar.gz zip) |
| parent | 091ee2190dd5f30ca5eb4549f531ab7b75a1fd6e | commitdiff |
linux: Add PR_SET_VMA_ANON_NAME support
Linux 5.17 added support to naming anonymous virtual memory areas
through the prctl syscall. The __set_vma_name is a wrapper to avoid
optimizing the prctl call if the kernel does not support it.
If the kernel does not support PR_SET_VMA_ANON_NAME, prctl returns
EINVAL. And it also returns the same error for an invalid argument.
Since it is an internal-only API, it assumes well-formatted input:
aligned START, with (START, START+LEN) being a valid memory range,
and NAME with a limit of 80 characters without an invalid one
("\\`$[]").
Reviewed-by: DJ Delorie <dj@redhat.com>
Linux 5.17 added support to naming anonymous virtual memory areas
through the prctl syscall. The __set_vma_name is a wrapper to avoid
optimizing the prctl call if the kernel does not support it.
If the kernel does not support PR_SET_VMA_ANON_NAME, prctl returns
EINVAL. And it also returns the same error for an invalid argument.
Since it is an internal-only API, it assumes well-formatted input:
aligned START, with (START, START+LEN) being a valid memory range,
and NAME with a limit of 80 characters without an invalid one
("\\`$[]").
Reviewed-by: DJ Delorie <dj@redhat.com>
| include/sys/prctl.h | diffblobblamehistory | |
| sysdeps/generic/setvmaname.h | [new file with mode: 0644] | blob |
| sysdeps/unix/sysv/linux/Makefile | diffblobblamehistory | |
| sysdeps/unix/sysv/linux/setvmaname.c | [new file with mode: 0644] | blob |
| sysdeps/unix/sysv/linux/setvmaname.h | [new file with mode: 0644] | blob |