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8a1d02aba9
Memory allocation failures are a very rare condition on virtual-memory hosts. They are also very difficult to handle correctly (especially in a hardware emulation context). Because of this, it is better to gracefully terminate emulation rather than executing untested or even unwritten recovery code paths. This patch changes the qemu memory allocation routines to terminate emulation if an allocation failure is encountered. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6526 c046a42c-6fe2-441c-8c8c-71466251a162
84 lines
2.1 KiB
C
84 lines
2.1 KiB
C
/*
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* malloc-like functions for system emulation.
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*
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* Copyright (c) 2006 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "qemu-common.h"
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#include <stdlib.h>
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static void *oom_check(void *ptr)
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{
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if (ptr == NULL)
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exit(13);
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return ptr;
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}
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void *get_mmap_addr(unsigned long size)
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{
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return NULL;
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}
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void qemu_free(void *ptr)
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{
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free(ptr);
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}
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void *qemu_malloc(size_t size)
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{
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return oom_check(malloc(size));
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}
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void *qemu_realloc(void *ptr, size_t size)
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{
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return oom_check(realloc(ptr, size));
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}
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void *qemu_mallocz(size_t size)
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{
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void *ptr;
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ptr = qemu_malloc(size);
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memset(ptr, 0, size);
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return ptr;
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}
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char *qemu_strdup(const char *str)
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{
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char *ptr;
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size_t len = strlen(str);
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ptr = qemu_malloc(len + 1);
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memcpy(ptr, str, len + 1);
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return ptr;
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}
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char *qemu_strndup(const char *str, size_t size)
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{
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const char *end = memchr(str, 0, size);
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char *new;
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if (end)
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size = end - str;
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new = qemu_malloc(size + 1);
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new[size] = 0;
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return memcpy(new, str, size);
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}
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