cd245a1932
It is often useful to instrument memory management functions in order to find leaks or performance problems. This patch adds trace events for the memory allocation primitives. Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
104 lines
2.5 KiB
C
104 lines
2.5 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 "trace.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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abort();
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}
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return ptr;
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}
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void qemu_free(void *ptr)
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{
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trace_qemu_free(ptr);
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free(ptr);
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}
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static int allow_zero_malloc(void)
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{
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#if defined(CONFIG_ZERO_MALLOC)
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return 1;
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#else
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return 0;
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#endif
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}
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void *qemu_malloc(size_t size)
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{
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void *ptr;
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if (!size && !allow_zero_malloc()) {
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abort();
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}
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ptr = oom_check(malloc(size ? size : 1));
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trace_qemu_malloc(size, ptr);
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return ptr;
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}
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void *qemu_realloc(void *ptr, size_t size)
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{
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void *newptr;
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if (!size && !allow_zero_malloc()) {
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abort();
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}
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newptr = oom_check(realloc(ptr, size ? size : 1));
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trace_qemu_realloc(ptr, size, newptr);
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return newptr;
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}
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void *qemu_mallocz(size_t size)
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{
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if (!size && !allow_zero_malloc()) {
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abort();
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}
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return oom_check(calloc(1, size ? size : 1));
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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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}
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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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