Archipelago » qemu

/*

 * malloc-like functions for system emulation.

 *

 * Copyright (c) 2006 Fabrice Bellard

 *

 * Permission is hereby granted, free of charge, to any person obtaining a copy

 * of this software and associated documentation files (the "Software"), to deal

 * in the Software without restriction, including without limitation the rights

 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

 * copies of the Software, and to permit persons to whom the Software is

 * furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in

 * all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL

 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

 * THE SOFTWARE.

 */

#include "qemu-common.h"

#include "trace.h"

#include <stdlib.h>

static void *oom_check(void *ptr)

{

    if (ptr == NULL) {

        abort();

    }

    return ptr;

}

void qemu_free(void *ptr)

{

    trace_qemu_free(ptr);

    free(ptr);

}

static int allow_zero_malloc(void)

{

#if defined(CONFIG_ZERO_MALLOC)

    return 1;

#else

    return 0;

#endif

}

void *qemu_malloc(size_t size)

{

    void *ptr;

    if (!size && !allow_zero_malloc()) {

        abort();

    }

    ptr = oom_check(malloc(size ? size : 1));

    trace_qemu_malloc(size, ptr);

    return ptr;

}

void *qemu_realloc(void *ptr, size_t size)

{

    void *newptr;

    if (!size && !allow_zero_malloc()) {

        abort();

    }

    newptr = oom_check(realloc(ptr, size ? size : 1));

    trace_qemu_realloc(ptr, size, newptr);

    return newptr;

}

void *qemu_mallocz(size_t size)

{

    if (!size && !allow_zero_malloc()) {

        abort();

    }

    return oom_check(calloc(1, size ? size : 1));

}

char *qemu_strdup(const char *str)

{

    char *ptr;

    size_t len = strlen(str);

    ptr = qemu_malloc(len + 1);

    memcpy(ptr, str, len + 1);

    return ptr;

}

char *qemu_strndup(const char *str, size_t size)

{

    const char *end = memchr(str, 0, size);

    char *new;

    if (end) {

        size = end - str;

    }

    new = qemu_malloc(size + 1);

    new[size] = 0;

    return memcpy(new, str, size);

}