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| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2023-11-01 09:56:05 -0300 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2023-11-07 10:27:20 -0300 |
| commit | 78ed8bdf4f13e7f5d8eef77c12fbb030fdbdafe0 (patch) | |
| tree | 11eb67f745b6a4142c44e486fba71e74e655f864 /sysdeps/generic | |
| parent | 091ee2190dd5f30ca5eb4549f531ab7b75a1fd6e (diff) | |
| download | glibc-78ed8bdf4f13e7f5d8eef77c12fbb030fdbdafe0.zip glibc-78ed8bdf4f13e7f5d8eef77c12fbb030fdbdafe0.tar.gz glibc-78ed8bdf4f13e7f5d8eef77c12fbb030fdbdafe0.tar.bz2 | |
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>
Diffstat (limited to 'sysdeps/generic')
| -rw-r--r-- | sysdeps/generic/setvmaname.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/sysdeps/generic/setvmaname.h b/sysdeps/generic/setvmaname.h new file mode 100644 index 0000000..2824587 --- /dev/null +++ b/sysdeps/generic/setvmaname.h @@ -0,0 +1,27 @@ +/* Utilities functions to name memory mappings. + Copyright (C) 2023 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <https://www.gnu.org/licenses/>. */ + +#ifndef __SETVMANAME_H +#define __SETVMANAME_H + +static inline +void __set_vma_name (void *start, size_t len, const char *name) +{ +} + +#endif |