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6ba408f073
This moves everything into other places and simple includes the files in the cases that it is necessary. In the future, we can rewrite sysprofd to use GDBus and add GetProcFile() to allow for client-side processing of kallsyms.
70 lines
1.9 KiB
C
70 lines
1.9 KiB
C
/* sp-platform.c
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*
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* Copyright 2016-2019 Christian Hergert <christian@hergert.me>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* SPDX-License-Identifier: GPL-3.0-or-later
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*/
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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 "sp-platform.h"
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/**
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* sp_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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sp_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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