C++ qemu_malloc函数代码示例

int
android_charmap_setup(const char* kcm_file_path) {
    // android_charmap_count being non-zero is used here as a flag,
    //  indicating that charmap has been initialized for the running
    // executable.
    if (android_charmap_count != 0) {
        return 0;
    }

    if (NULL != kcm_file_path) {
        if (!parse_kcm_file(kcm_file_path, &android_custom_charmap)) {
            // Here we have two default charmaps and the custom one.
            android_charmap_count = 3;
            android_charmaps = qemu_malloc(sizeof(AKeyCharmap*) *
                                           android_charmap_count);
            android_charmaps[0] = &android_custom_charmap;
            android_charmaps[1] = &_qwerty_charmap;
            android_charmaps[2] = &_qwerty2_charmap;
        } else {
            derror("Unable to parse kcm file.");
            return -1;
        }
    } else {
        // Here we have only two default charmaps.
        android_charmap_count = 2;
        android_charmaps = qemu_malloc(sizeof(AKeyCharmap*) *
                           android_charmap_count);
        android_charmaps[0] = &_qwerty_charmap;
        android_charmaps[1] = &_qwerty2_charmap;
    }

    return 0;
}

int
android_charmap_setup(const char* kcm_file_path) {
    if (NULL != kcm_file_path) {
        if (!parse_kcm_file(kcm_file_path, &android_custom_charmap)) {
            // Here we have two default charmaps and the custom one.
            android_charmap_count = 3;
            android_charmaps = qemu_malloc(sizeof(AKeyCharmap*) *
                                           android_charmap_count);
            android_charmaps[0] = &android_custom_charmap;
            android_charmaps[1] = &_qwerty_charmap;
            android_charmaps[2] = &_qwerty2_charmap;
        } else {
            derror("Unable to parse kcm file.");
            return -1;
        }
    } else {
        // Here we have only two default charmaps.
        android_charmap_count = 2;
        android_charmaps = qemu_malloc(sizeof(AKeyCharmap*) *
                           android_charmap_count);
        android_charmaps[0] = &_qwerty_charmap;
        android_charmaps[1] = &_qwerty2_charmap;
    }

    return 0;
}

int qcow2_read_snapshots(BlockDriverState *bs)
{
    BDRVQcowState *s = bs->opaque;
    QCowSnapshotHeader h;
    QCowSnapshot *sn;
    int i, id_str_size, name_size;
    int64_t offset;
    uint32_t extra_data_size;

    if (!s->nb_snapshots) {
        s->snapshots = NULL;
        s->snapshots_size = 0;
        return 0;
    }

    offset = s->snapshots_offset;
    s->snapshots = qemu_mallocz(s->nb_snapshots * sizeof(QCowSnapshot));
    for(i = 0; i < s->nb_snapshots; i++) {
        offset = align_offset(offset, 8);
        if (bdrv_pread(s->hd, offset, &h, sizeof(h)) != sizeof(h))
            goto fail;
        offset += sizeof(h);
        sn = s->snapshots + i;
        sn->l1_table_offset = be64_to_cpu(h.l1_table_offset);
        sn->l1_size = be32_to_cpu(h.l1_size);
        sn->vm_state_size = be32_to_cpu(h.vm_state_size);
        sn->date_sec = be32_to_cpu(h.date_sec);
        sn->date_nsec = be32_to_cpu(h.date_nsec);
        sn->vm_clock_nsec = be64_to_cpu(h.vm_clock_nsec);
        extra_data_size = be32_to_cpu(h.extra_data_size);

        id_str_size = be16_to_cpu(h.id_str_size);
        name_size = be16_to_cpu(h.name_size);

        offset += extra_data_size;

        sn->id_str = qemu_malloc(id_str_size + 1);
        if (bdrv_pread(s->hd, offset, sn->id_str, id_str_size) != id_str_size)
            goto fail;
        offset += id_str_size;
        sn->id_str[id_str_size] = '\0';

        sn->name = qemu_malloc(name_size + 1);
        if (bdrv_pread(s->hd, offset, sn->name, name_size) != name_size)
            goto fail;
        offset += name_size;
        sn->name[name_size] = '\0';
    }
    s->snapshots_size = offset - s->snapshots_offset;
    return 0;
 fail:
    qcow2_free_snapshots(bs);
    return -1;
}

/*
 * allocate the set of arrays for certs, cert_len, key
 */
static PRBool
vcard_emul_alloc_arrays(unsigned char ***certsp, int **cert_lenp,
                        VCardKey ***keysp, int cert_count)
{
    *certsp = NULL;
    *cert_lenp = NULL;
    *keysp = NULL;
    *certsp = (unsigned char **)qemu_malloc(sizeof(unsigned char *)*cert_count);
    *cert_lenp = (int *)qemu_malloc(sizeof(int)*cert_count);
    *keysp = (VCardKey **)qemu_malloc(sizeof(VCardKey *)*cert_count);
    return PR_TRUE;
}

void *qemu_realloc(void *ptr, size_t size)
{
    size_t old_size, copy;
    void *new_ptr;

    if (!ptr)
        return qemu_malloc(size);
    old_size = *(size_t *)((char *)ptr - 16);
    copy = old_size < size ? old_size : size;
    new_ptr = qemu_malloc(size);
    memcpy(new_ptr, ptr, copy);
    qemu_free(ptr);
    return new_ptr;
}

static int cloop_open(BlockDriverState *bs, const char *filename, int flags)
{
    BDRVCloopState *s = bs->opaque;
    uint32_t offsets_size,max_compressed_block_size=1,i;

    s->fd = open(filename, O_RDONLY | O_BINARY);
    if (s->fd < 0)
        return -errno;
    bs->read_only = 1;

    /* read header */
    if(lseek(s->fd,128,SEEK_SET)<0) {
cloop_close:
        close(s->fd);
        return -1;
    }
    if(qemu_read_ok(s->fd,&s->block_size,4)<0)
        goto cloop_close;
    s->block_size=be32_to_cpu(s->block_size);
    if(qemu_read_ok(s->fd,&s->n_blocks,4)<0)
        goto cloop_close;
    s->n_blocks=be32_to_cpu(s->n_blocks);

    /* read offsets */
    offsets_size=s->n_blocks*sizeof(uint64_t);
    if(!(s->offsets=(uint64_t*)malloc(offsets_size)))
        goto cloop_close;
    if(read(s->fd,s->offsets,offsets_size)<offsets_size)
        goto cloop_close;
    for(i=0; i<s->n_blocks; i++) {
        s->offsets[i]=be64_to_cpu(s->offsets[i]);
        if(i>0) {
            uint32_t size=s->offsets[i]-s->offsets[i-1];
            if(size>max_compressed_block_size)
                max_compressed_block_size=size;
        }
    }

    /* initialize zlib engine */
    s->compressed_block = qemu_malloc(max_compressed_block_size+1);
    s->uncompressed_block = qemu_malloc(s->block_size);
    if(inflateInit(&s->zstream) != Z_OK)
        goto cloop_close;
    s->current_block=s->n_blocks;

    s->sectors_per_block = s->block_size/512;
    bs->total_sectors = s->n_blocks*s->sectors_per_block;
    return 0;
}

static int cloop_open(BlockDriverState *bs, int flags)
{
    BDRVCloopState *s = bs->opaque;
    uint32_t offsets_size,max_compressed_block_size=1,i;

    bs->read_only = 1;

    
    if (bdrv_pread(bs->file, 128, &s->block_size, 4) < 4) {
        goto cloop_close;
    }
    s->block_size = be32_to_cpu(s->block_size);

    if (bdrv_pread(bs->file, 128 + 4, &s->n_blocks, 4) < 4) {
        goto cloop_close;
    }
    s->n_blocks = be32_to_cpu(s->n_blocks);

    
    offsets_size = s->n_blocks * sizeof(uint64_t);
    s->offsets = qemu_malloc(offsets_size);
    if (bdrv_pread(bs->file, 128 + 4 + 4, s->offsets, offsets_size) <
            offsets_size) {
	goto cloop_close;
    }
    for(i=0;i<s->n_blocks;i++) {
	s->offsets[i]=be64_to_cpu(s->offsets[i]);
	if(i>0) {
	    uint32_t size=s->offsets[i]-s->offsets[i-1];
	    if(size>max_compressed_block_size)
		max_compressed_block_size=size;
	}
    }

    
    s->compressed_block = qemu_malloc(max_compressed_block_size+1);
    s->uncompressed_block = qemu_malloc(s->block_size);
    if(inflateInit(&s->zstream) != Z_OK)
	goto cloop_close;
    s->current_block=s->n_blocks;

    s->sectors_per_block = s->block_size/512;
    bs->total_sectors = s->n_blocks*s->sectors_per_block;
    return 0;

cloop_close:
    return -1;
}

static int parallels_open(BlockDriverState *bs, int flags)
{
    BDRVParallelsState *s = bs->opaque;
    int i;
    struct parallels_header ph;

    bs->read_only = 1; 

    if (bdrv_pread(bs->file, 0, &ph, sizeof(ph)) != sizeof(ph))
        goto fail;

    if (memcmp(ph.magic, HEADER_MAGIC, 16) ||
	(le32_to_cpu(ph.version) != HEADER_VERSION)) {
        goto fail;
    }

    bs->total_sectors = le32_to_cpu(ph.nb_sectors);

    s->tracks = le32_to_cpu(ph.tracks);

    s->catalog_size = le32_to_cpu(ph.catalog_entries);
    s->catalog_bitmap = qemu_malloc(s->catalog_size * 4);
    if (bdrv_pread(bs->file, 64, s->catalog_bitmap, s->catalog_size * 4) !=
	s->catalog_size * 4)
	goto fail;
    for (i = 0; i < s->catalog_size; i++)
	le32_to_cpus(&s->catalog_bitmap[i]);

    return 0;
fail:
    if (s->catalog_bitmap)
	qemu_free(s->catalog_bitmap);
    return -1;
}

/* XXX this needs to be emulated on non-FreeBSD hosts... */
static abi_long do_freebsd_sysctl(abi_ulong namep, int32_t namelen, abi_ulong oldp,
                          abi_ulong oldlenp, abi_ulong newp, abi_ulong newlen)
{
    abi_long ret;
    void *hnamep, *holdp, *hnewp = NULL;
    size_t holdlen;
    abi_ulong oldlen = 0;
    int32_t *snamep = qemu_malloc(sizeof(int32_t) * namelen), *p, *q, i;
    uint32_t kind = 0;

    if (oldlenp)
        get_user_ual(oldlen, oldlenp);
    if (!(hnamep = lock_user(VERIFY_READ, namep, namelen, 1)))
        return -TARGET_EFAULT;
    if (newp && !(hnewp = lock_user(VERIFY_READ, newp, newlen, 1)))
        return -TARGET_EFAULT;
    if (!(holdp = lock_user(VERIFY_WRITE, oldp, oldlen, 0)))
        return -TARGET_EFAULT;
    holdlen = oldlen;
    for (p = hnamep, q = snamep, i = 0; i < namelen; p++, i++)
       *q++ = tswap32(*p);
    oidfmt(snamep, namelen, NULL, &kind);
    /* XXX swap hnewp */
    ret = get_errno(sysctl(snamep, namelen, holdp, &holdlen, hnewp, newlen));
    if (!ret)
        sysctl_oldcvt(holdp, holdlen, kind);
    put_user_ual(holdlen, oldlenp);
    unlock_user(hnamep, namep, 0);
    unlock_user(holdp, oldp, holdlen);
    if (hnewp)
        unlock_user(hnewp, newp, 0);
    qemu_free(snamep);
    return ret;
}

PSOCKET_ENTRY
InsertSocketHandle(
   IN ULONG ProcessId,
   IN HANDLE SocketHandle
   )
{
	PSOCKET_ENTRY Entry;

	if (!s_SocketListInitialized)
		return NULL;

	Entry = (PSOCKET_ENTRY)qemu_malloc(sizeof(SOCKET_ENTRY));

	if(Entry)
	{
		//fprintf(stderr, "InsertSocketHandle(PID:%d; SocketHandle:%x)\n", ProcessId, SocketHandle);

		memset(Entry, 0, sizeof(SOCKET_ENTRY));
		Entry->SocketHandle = SocketHandle;
		Entry->ProcessId = ProcessId;
		
		Entry->protocol = IPPROTO_IP;

		InsertHeadList(&s_SocketList, &Entry->ListEntry);
	}

	return Entry;
}

/* compatibility wrapper */
int unix_listen(const char *str, char *ostr, int olen)
{
    QemuOpts *opts;
    char *path, *optstr;
    int sock, len;

    opts = qemu_opts_create(&dummy_opts, NULL, 0);

    optstr = strchr(str, ',');
    if (optstr) {
        len = optstr - str;
        if (len) {
            path = qemu_malloc(len+1);
            snprintf(path, len+1, "%.*s", len, str);
            qemu_opt_set(opts, "path", path);
            qemu_free(path);
        }
    } else {
        qemu_opt_set(opts, "path", str);
    }

    sock = unix_listen_opts(opts);

    if (sock != -1 && ostr)
        snprintf(ostr, olen, "%s%s", qemu_opt_get(opts, "path"), optstr ? optstr : "");
    qemu_opts_del(opts);
    return sock;
}

static int vnc_set_x509_credential(VncDisplay *vd,
                                   const char *certdir,
                                   const char *filename,
                                   char **cred,
                                   int ignoreMissing)
{
    struct stat sb;

    if (*cred) {
        qemu_free(*cred);
        *cred = NULL;
    }

    *cred = qemu_malloc(strlen(certdir) + strlen(filename) + 2);

    strcpy(*cred, certdir);
    strcat(*cred, "/");
    strcat(*cred, filename);

    VNC_DEBUG("Check %s\n", *cred);
    if (stat(*cred, &sb) < 0) {
        qemu_free(*cred);
        *cred = NULL;
        if (ignoreMissing && errno == ENOENT)
            return 0;
        return -1;
    }

    return 0;
}

void qemu_iovec_init(QEMUIOVector *qiov, int alloc_hint)
{
    qiov->iov = qemu_malloc(alloc_hint * sizeof(struct iovec));
    qiov->niov = 0;
    qiov->nalloc = alloc_hint;
    qiov->size = 0;
}

int kvmppc_read_host_property(const char *node_path, const char *prop,
                                     void *val, size_t len)
{
    char *path;
    FILE *f;
    int ret = 0;
    int pathlen;

    pathlen = snprintf(NULL, 0, "%s/%s/%s", PROC_DEVTREE_PATH, node_path, prop)
              + 1;
    path = qemu_malloc(pathlen);

    snprintf(path, pathlen, "%s/%s/%s", PROC_DEVTREE_PATH, node_path, prop);

    f = fopen(path, "rb");
    if (f == NULL) {
        ret = errno;
        goto free;
    }

    len = fread(val, len, 1, f);
    if (len != 1) {
        ret = ferror(f);
        goto close;
    }

close:
    fclose(f);
free:
    free(path);
out:
    return ret;
}

void qemu_sglist_init(QEMUSGList *qsg, int alloc_hint)
{
    qsg->sg = qemu_malloc(alloc_hint * sizeof(ScatterGatherEntry));
    qsg->nsg = 0;
    qsg->nalloc = alloc_hint;
    qsg->size = 0;
}