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532972beb6
This allows embedding the static capture library without having to deal with license incompatibility while retaining the patent clause. We want as many consumers of the format as makes sense without the restriction of what kind of app/library/tooling they are. The application, sysprofd, libsysprof, and libsysprof-ui continue to be GPLv3+.
108 lines
4.0 KiB
C
108 lines
4.0 KiB
C
/* sysprof-platform.c
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*
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* Copyright 2016-2019 Christian Hergert <chergert@redhat.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* Subject to the terms and conditions of this license, each copyright holder
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* and contributor hereby grants to those receiving rights under this license
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* a perpetual, worldwide, non-exclusive, no-charge, royalty-free,
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* irrevocable (except for failure to satisfy the conditions of this license)
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* patent license to make, have made, use, offer to sell, sell, import, and
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* otherwise transfer this software, where such license applies only to those
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* patent claims, already acquired or hereafter acquired, licensable by such
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* copyright holder or contributor that are necessarily infringed by:
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*
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* (a) their Contribution(s) (the licensed copyrights of copyright holders
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* and non-copyrightable additions of contributors, in source or binary
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* form) alone; or
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*
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* (b) combination of their Contribution(s) with the work of authorship to
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* which such Contribution(s) was added by such copyright holder or
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* contributor, if, at the time the Contribution is added, such addition
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* causes such combination to be necessarily infringed. The patent license
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* shall not apply to any other combinations which include the
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* Contribution.
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*
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* Except as expressly stated above, no rights or licenses from any copyright
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* holder or contributor is granted under this license, whether expressly, by
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* implication, estoppel or otherwise.
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*
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* DISCLAIMER
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* SPDX-License-Identifier: BSD-2-Clause-Patent
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*/
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#define G_LOG_DOMAIN "sysprof-platform"
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#include "config.h"
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#include <glib.h>
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#include <glib/gstdio.h>
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#include <sys/syscall.h>
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#include <unistd.h>
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#include "sysprof-platform.h"
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/**
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* sysprof_memfd_create:
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* @name: (nullable): A descriptive name for the memfd or %NULL
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*
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* Creates a new memfd using the memfd_create syscall if available.
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* Otherwise, a tmpfile is used. Currently, no attempt is made to
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* ensure the tmpfile is on a tmpfs backed mount.
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*
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* Returns: An fd if successful; otherwise -1 and errno is set.
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*/
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int
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sysprof_memfd_create (const gchar *name)
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{
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#ifdef __NR_memfd_create
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if (name == NULL)
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name = "[sysprof]";
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return syscall (__NR_memfd_create, name, 0);
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#else
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gchar *name_used = NULL;
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int fd;
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/*
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* TODO: It would be nice to ensure tmpfs
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*
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* It is not strictly required that the preferred temporary directory
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* will be mounted as tmpfs. We should look through the mounts and ensure
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* that the tmpfile we open is on tmpfs so that we get anonymous backed
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* pages after unlinking.
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*/
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fd = g_file_open_tmp (NULL, &name_used, NULL);
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if (name_used != NULL)
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{
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g_unlink (name_used);
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g_free (name_used);
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}
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return fd;
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#endif
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}
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