c5baa0edc4
The idea is to panic() when there is no memory available for normal operation. Exception: code which can consume arbitrary amount of RAM (example: files allocated in ramfs) must report error instead of panic(). This patch also fixes code which didn't check for NULL from malloc() etc. Usage: malloc(), memalign() return NULL when out of RAM. xmalloc(), xmemalign() always return non-NULL or panic(). Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
81 lines
1.7 KiB
C
81 lines
1.7 KiB
C
/*
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* xfuncs.c - safe malloc funcions
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*
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* based on busybox
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*
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* Copyright (c) 2007 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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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 version 2
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* as published by the Free Software Foundation.
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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, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <common.h>
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#include <malloc.h>
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#include <module.h>
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void *xmalloc(size_t size)
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{
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void *p = NULL;
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if (!(p = malloc(size)))
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panic("ERROR: out of memory\n");
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debug("xmalloc %p (size %d)\n", p, size);
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return p;
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}
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EXPORT_SYMBOL(xmalloc);
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void *xrealloc(void *ptr, size_t size)
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{
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void *p = NULL;
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if (!(p = realloc(ptr, size)))
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panic("ERROR: out of memory\n");
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debug("xrealloc %p -> %p (size %d)\n", ptr, p, size);
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return p;
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}
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EXPORT_SYMBOL(xrealloc);
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void *xzalloc(size_t size)
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{
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void *ptr = xmalloc(size);
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memset(ptr, 0, size);
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return ptr;
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}
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EXPORT_SYMBOL(xzalloc);
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char *xstrdup(const char *s)
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{
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char *p = strdup(s);
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if (!p)
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panic("ERROR: out of memory\n");
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return p;
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}
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EXPORT_SYMBOL(xstrdup);
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void* xmemalign(size_t alignment, size_t bytes)
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{
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void *p = memalign(alignment, bytes);
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if (!p)
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panic("ERROR: out of memory\n");
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return p;
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}
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EXPORT_SYMBOL(xmemalign);
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