g_new(T, n) is neater than g_malloc(sizeof(T) * n). It's also safer, for two reasons. One, it catches multiplication overflowing size_t. Two, it returns T * rather than void *, which lets the compiler catch more type errors.
Patch created with Coccinelle, with two manual changes on top: * Add const to bdrv_iterate_format() to keep the types straight * Convert the allocation in bdrv_drop_intermediate(), which Coccinelle inexplicably misses Coccinelle semantic patch: @@ type T; @@ -g_malloc(sizeof(T)) +g_new(T, 1) @@ type T; @@ -g_try_malloc(sizeof(T)) +g_try_new(T, 1) @@ type T; @@ -g_malloc0(sizeof(T)) +g_new0(T, 1) @@ type T; @@ -g_try_malloc0(sizeof(T)) +g_try_new0(T, 1) @@ type T; expression n; @@ -g_malloc(sizeof(T) * (n)) +g_new(T, n) @@ type T; expression n; @@ -g_try_malloc(sizeof(T) * (n)) +g_try_new(T, n) @@ type T; expression n; @@ -g_malloc0(sizeof(T) * (n)) +g_new0(T, n) @@ type T; expression n; @@ -g_try_malloc0(sizeof(T) * (n)) +g_try_new0(T, n) @@ type T; expression p, n; @@ -g_realloc(p, sizeof(T) * (n)) +g_renew(T, p, n) @@ type T; expression p, n; @@ -g_try_realloc(p, sizeof(T) * (n)) +g_try_renew(T, p, n) Signed-off-by: Markus Armbruster <arm...@redhat.com> --- block-migration.c | 6 +++--- block.c | 14 +++++++------- block/gluster.c | 8 ++++---- block/iscsi.c | 2 +- block/nfs.c | 2 +- block/qcow.c | 2 +- block/qcow2-cluster.c | 2 +- block/qcow2-refcount.c | 8 ++++---- block/qcow2-snapshot.c | 8 ++++---- block/raw-posix.c | 2 +- block/rbd.c | 4 ++-- block/sheepdog.c | 4 ++-- block/vdi.c | 2 +- block/vhdx.c | 4 ++-- block/vmdk.c | 7 +++---- block/vvfat.c | 2 +- blockdev-nbd.c | 2 +- blockdev.c | 2 +- hw/ide/ahci.c | 2 +- qemu-img.c | 2 +- qemu-io.c | 2 +- 21 files changed, 43 insertions(+), 44 deletions(-) diff --git a/block-migration.c b/block-migration.c index 1656270..f717e47 100644 --- a/block-migration.c +++ b/block-migration.c @@ -284,7 +284,7 @@ static int mig_save_device_bulk(QEMUFile *f, BlkMigDevState *bmds) nr_sectors = total_sectors - cur_sector; } - blk = g_malloc(sizeof(BlkMigBlock)); + blk = g_new(BlkMigBlock, 1); blk->buf = g_malloc(BLOCK_SIZE); blk->bmds = bmds; blk->sector = cur_sector; @@ -355,7 +355,7 @@ static void init_blk_migration_it(void *opaque, BlockDriverState *bs) return; } - bmds = g_malloc0(sizeof(BlkMigDevState)); + bmds = g_new0(BlkMigDevState, 1); bmds->bs = bs; bmds->bulk_completed = 0; bmds->total_sectors = sectors; @@ -466,7 +466,7 @@ static int mig_save_device_dirty(QEMUFile *f, BlkMigDevState *bmds, } else { nr_sectors = BDRV_SECTORS_PER_DIRTY_CHUNK; } - blk = g_malloc(sizeof(BlkMigBlock)); + blk = g_new(BlkMigBlock, 1); blk->buf = g_malloc(BLOCK_SIZE); blk->bmds = bmds; blk->sector = sector; diff --git a/block.c b/block.c index 909ecbe..cfe6022 100644 --- a/block.c +++ b/block.c @@ -348,7 +348,7 @@ BlockDriverState *bdrv_new(const char *device_name, Error **errp) return NULL; } - bs = g_malloc0(sizeof(BlockDriverState)); + bs = g_new0(BlockDriverState, 1); QLIST_INIT(&bs->dirty_bitmaps); pstrcpy(bs->device_name, sizeof(bs->device_name), device_name); if (device_name[0] != '\0') { @@ -2649,7 +2649,7 @@ int bdrv_drop_intermediate(BlockDriverState *active, BlockDriverState *top, * into our deletion queue, until we hit the 'base' */ while (intermediate) { - intermediate_state = g_malloc0(sizeof(BlkIntermediateStates)); + intermediate_state = g_new0(BlkIntermediateStates, 1); intermediate_state->bs = intermediate; QSIMPLEQ_INSERT_TAIL(&states_to_delete, intermediate_state, entry); @@ -3732,7 +3732,7 @@ void bdrv_iterate_format(void (*it)(void *opaque, const char *name), } if (!found) { - formats = g_realloc(formats, (count + 1) * sizeof(char *)); + formats = g_renew(const char *, formats, count + 1); formats[count++] = drv->format_name; it(opaque, drv->format_name); } @@ -5284,7 +5284,7 @@ BdrvDirtyBitmap *bdrv_create_dirty_bitmap(BlockDriverState *bs, int granularity, return NULL; } bitmap_size >>= BDRV_SECTOR_BITS; - bitmap = g_malloc0(sizeof(BdrvDirtyBitmap)); + bitmap = g_new0(BdrvDirtyBitmap, 1); bitmap->bitmap = hbitmap_alloc(bitmap_size, ffs(granularity) - 1); QLIST_INSERT_HEAD(&bs->dirty_bitmaps, bitmap, list); return bitmap; @@ -5310,8 +5310,8 @@ BlockDirtyInfoList *bdrv_query_dirty_bitmaps(BlockDriverState *bs) BlockDirtyInfoList **plist = &list; QLIST_FOREACH(bm, &bs->dirty_bitmaps, list) { - BlockDirtyInfo *info = g_malloc0(sizeof(BlockDirtyInfo)); - BlockDirtyInfoList *entry = g_malloc0(sizeof(BlockDirtyInfoList)); + BlockDirtyInfo *info = g_new0(BlockDirtyInfo, 1); + BlockDirtyInfoList *entry = g_new0(BlockDirtyInfoList, 1); info->count = bdrv_get_dirty_count(bs, bm); info->granularity = ((int64_t) BDRV_SECTOR_SIZE << hbitmap_granularity(bm->bitmap)); @@ -5402,7 +5402,7 @@ void bdrv_op_block(BlockDriverState *bs, BlockOpType op, Error *reason) BdrvOpBlocker *blocker; assert((int) op >= 0 && op < BLOCK_OP_TYPE_MAX); - blocker = g_malloc0(sizeof(BdrvOpBlocker)); + blocker = g_new0(BdrvOpBlocker, 1); blocker->reason = reason; QLIST_INSERT_HEAD(&bs->op_blockers[op], blocker, list); } diff --git a/block/gluster.c b/block/gluster.c index d0726ec..578647b 100644 --- a/block/gluster.c +++ b/block/gluster.c @@ -290,7 +290,7 @@ static int qemu_gluster_open(BlockDriverState *bs, QDict *options, BDRVGlusterState *s = bs->opaque; int open_flags = 0; int ret = 0; - GlusterConf *gconf = g_malloc0(sizeof(GlusterConf)); + GlusterConf *gconf = g_new0(GlusterConf, 1); QemuOpts *opts; Error *local_err = NULL; const char *filename; @@ -350,12 +350,12 @@ static int qemu_gluster_reopen_prepare(BDRVReopenState *state, assert(state != NULL); assert(state->bs != NULL); - state->opaque = g_malloc0(sizeof(BDRVGlusterReopenState)); + state->opaque = g_new0(BDRVGlusterReopenState, 1); reop_s = state->opaque; qemu_gluster_parse_flags(state->flags, &open_flags); - gconf = g_malloc0(sizeof(GlusterConf)); + gconf = g_new0(GlusterConf, 1); reop_s->glfs = qemu_gluster_init(gconf, state->bs->filename, errp); if (reop_s->glfs == NULL) { @@ -483,7 +483,7 @@ static int qemu_gluster_create(const char *filename, int ret = 0; int prealloc = 0; int64_t total_size = 0; - GlusterConf *gconf = g_malloc0(sizeof(GlusterConf)); + GlusterConf *gconf = g_new0(GlusterConf, 1); glfs = qemu_gluster_init(gconf, filename, errp); if (!glfs) { diff --git a/block/iscsi.c b/block/iscsi.c index b3e9bdd..f54233b 100644 --- a/block/iscsi.c +++ b/block/iscsi.c @@ -1530,7 +1530,7 @@ static int iscsi_create(const char *filename, QEMUOptionParameter *options, options++; } - bs->opaque = g_malloc0(sizeof(struct IscsiLun)); + bs->opaque = g_new0(struct IscsiLun, 1); iscsilun = bs->opaque; bs_options = qdict_new(); diff --git a/block/nfs.c b/block/nfs.c index e3d6216..2b968a1 100644 --- a/block/nfs.c +++ b/block/nfs.c @@ -370,7 +370,7 @@ static int nfs_file_create(const char *url, QEMUOptionParameter *options, { int ret = 0; int64_t total_size = 0; - NFSClient *client = g_malloc0(sizeof(NFSClient)); + NFSClient *client = g_new0(NFSClient, 1); /* Read out options */ while (options && options->name) { diff --git a/block/qcow.c b/block/qcow.c index 31db585..2061af1 100644 --- a/block/qcow.c +++ b/block/qcow.c @@ -182,7 +182,7 @@ static int qcow_open(BlockDriverState *bs, QDict *options, int flags, } s->l1_table_offset = header.l1_table_offset; - s->l1_table = g_try_malloc(s->l1_size * sizeof(uint64_t)); + s->l1_table = g_try_new(uint64_t, s->l1_size); if (s->l1_table == NULL) { error_setg(errp, "Could not allocate memory for L1 table"); ret = -ENOMEM; diff --git a/block/qcow2-cluster.c b/block/qcow2-cluster.c index d391c5a..29f4ffa 100644 --- a/block/qcow2-cluster.c +++ b/block/qcow2-cluster.c @@ -710,7 +710,7 @@ int qcow2_alloc_cluster_link_l2(BlockDriverState *bs, QCowL2Meta *m) trace_qcow2_cluster_link_l2(qemu_coroutine_self(), m->nb_clusters); assert(m->nb_clusters > 0); - old_cluster = g_try_malloc(m->nb_clusters * sizeof(uint64_t)); + old_cluster = g_try_new(uint64_t, m->nb_clusters); if (old_cluster == NULL) { ret = -ENOMEM; goto err; diff --git a/block/qcow2-refcount.c b/block/qcow2-refcount.c index 494a182..1edcc81 100644 --- a/block/qcow2-refcount.c +++ b/block/qcow2-refcount.c @@ -347,7 +347,7 @@ static int alloc_refcount_block(BlockDriverState *bs, uint64_t meta_offset = (blocks_used * refcount_block_clusters) * s->cluster_size; uint64_t table_offset = meta_offset + blocks_clusters * s->cluster_size; - uint64_t *new_table = g_try_malloc0(table_size * sizeof(uint64_t)); + uint64_t *new_table = g_try_new0(uint64_t, table_size); uint16_t *new_blocks = g_try_malloc0(blocks_clusters * s->cluster_size); assert(table_size > 0 && blocks_clusters > 0); @@ -1519,7 +1519,7 @@ int qcow2_check_refcounts(BlockDriverState *bs, BdrvCheckResult *res, return -EFBIG; } - refcount_table = g_try_malloc0(nb_clusters * sizeof(uint16_t)); + refcount_table = g_try_new0(uint16_t, nb_clusters); if (nb_clusters && refcount_table == NULL) { return -ENOMEM; } @@ -1599,8 +1599,8 @@ int qcow2_check_refcounts(BlockDriverState *bs, BdrvCheckResult *res, /* increase refcount_table size if necessary */ int old_nb_clusters = nb_clusters; nb_clusters = (new_offset >> s->cluster_bits) + 1; - refcount_table = g_realloc(refcount_table, - nb_clusters * sizeof(uint16_t)); + refcount_table = g_renew(uint16_t, refcount_table, + nb_clusters); memset(&refcount_table[old_nb_clusters], 0, (nb_clusters - old_nb_clusters) * sizeof(uint16_t)); } diff --git a/block/qcow2-snapshot.c b/block/qcow2-snapshot.c index 26889bf..5b2786d 100644 --- a/block/qcow2-snapshot.c +++ b/block/qcow2-snapshot.c @@ -58,7 +58,7 @@ int qcow2_read_snapshots(BlockDriverState *bs) } offset = s->snapshots_offset; - s->snapshots = g_malloc0(s->nb_snapshots * sizeof(QCowSnapshot)); + s->snapshots = g_new0(QCowSnapshot, s->nb_snapshots); for(i = 0; i < s->nb_snapshots; i++) { /* Read statically sized part of the snapshot header */ @@ -381,7 +381,7 @@ int qcow2_snapshot_create(BlockDriverState *bs, QEMUSnapshotInfo *sn_info) sn->l1_table_offset = l1_table_offset; sn->l1_size = s->l1_size; - l1_table = g_try_malloc(s->l1_size * sizeof(uint64_t)); + l1_table = g_try_new(uint64_t, s->l1_size); if (s->l1_size && l1_table == NULL) { ret = -ENOMEM; goto fail; @@ -417,7 +417,7 @@ int qcow2_snapshot_create(BlockDriverState *bs, QEMUSnapshotInfo *sn_info) } /* Append the new snapshot to the snapshot list */ - new_snapshot_list = g_malloc((s->nb_snapshots + 1) * sizeof(QCowSnapshot)); + new_snapshot_list = g_new(QCowSnapshot, s->nb_snapshots + 1); if (s->snapshots) { memcpy(new_snapshot_list, s->snapshots, s->nb_snapshots * sizeof(QCowSnapshot)); @@ -661,7 +661,7 @@ int qcow2_snapshot_list(BlockDriverState *bs, QEMUSnapshotInfo **psn_tab) return s->nb_snapshots; } - sn_tab = g_malloc0(s->nb_snapshots * sizeof(QEMUSnapshotInfo)); + sn_tab = g_new0(QEMUSnapshotInfo, s->nb_snapshots); for(i = 0; i < s->nb_snapshots; i++) { sn_info = sn_tab + i; sn = s->snapshots + i; diff --git a/block/raw-posix.c b/block/raw-posix.c index 459f197..d8c8c90 100644 --- a/block/raw-posix.c +++ b/block/raw-posix.c @@ -483,7 +483,7 @@ static int raw_reopen_prepare(BDRVReopenState *state, s = state->bs->opaque; - state->opaque = g_malloc0(sizeof(BDRVRawReopenState)); + state->opaque = g_new0(BDRVRawReopenState, 1); raw_s = state->opaque; #ifdef CONFIG_LINUX_AIO diff --git a/block/rbd.c b/block/rbd.c index 147e33f..d6d9955 100644 --- a/block/rbd.c +++ b/block/rbd.c @@ -658,7 +658,7 @@ static BlockDriverAIOCB *rbd_start_aio(BlockDriverState *bs, off = sector_num * BDRV_SECTOR_SIZE; size = nb_sectors * BDRV_SECTOR_SIZE; - rcb = g_malloc(sizeof(RADOSCB)); + rcb = g_new(RADOSCB, 1); rcb->done = 0; rcb->acb = acb; rcb->buf = buf; @@ -876,7 +876,7 @@ static int qemu_rbd_snap_list(BlockDriverState *bs, goto done; } - sn_tab = g_malloc0(snap_count * sizeof(QEMUSnapshotInfo)); + sn_tab = g_new0(QEMUSnapshotInfo, snap_count); for (i = 0; i < snap_count; i++) { const char *snap_name = snaps[i].name; diff --git a/block/sheepdog.c b/block/sheepdog.c index 39f7461..1eb1fd0 100644 --- a/block/sheepdog.c +++ b/block/sheepdog.c @@ -1647,7 +1647,7 @@ static int sd_create(const char *filename, QEMUOptionParameter *options, uint32_t snapid; bool prealloc = false; - s = g_malloc0(sizeof(BDRVSheepdogState)); + s = g_new0(BDRVSheepdogState, 1); memset(tag, 0, sizeof(tag)); if (strstr(filename, "://")) { @@ -2235,7 +2235,7 @@ static int sd_snapshot_goto(BlockDriverState *bs, const char *snapshot_id) uint32_t snapid = 0; int ret = 0; - old_s = g_malloc(sizeof(BDRVSheepdogState)); + old_s = g_new(BDRVSheepdogState, 1); memcpy(old_s, s, sizeof(BDRVSheepdogState)); diff --git a/block/vdi.c b/block/vdi.c index b0b40fc..de71c0a 100644 --- a/block/vdi.c +++ b/block/vdi.c @@ -293,7 +293,7 @@ static int vdi_check(BlockDriverState *bs, BdrvCheckResult *res, return -ENOTSUP; } - bmap = g_try_malloc(s->header.blocks_in_image * sizeof(uint32_t)); + bmap = g_try_new(uint32_t, s->header.blocks_in_image); if (s->header.blocks_in_image && bmap == NULL) { res->check_errors++; return -ENOMEM; diff --git a/block/vhdx.c b/block/vhdx.c index 0922f55..3b08e21 100644 --- a/block/vhdx.c +++ b/block/vhdx.c @@ -1373,7 +1373,7 @@ static int vhdx_create_new_headers(BlockDriverState *bs, uint64_t image_size, int ret = 0; VHDXHeader *hdr = NULL; - hdr = g_malloc0(sizeof(VHDXHeader)); + hdr = g_new0(VHDXHeader, 1); hdr->signature = VHDX_HEADER_SIGNATURE; hdr->sequence_number = g_random_int(); @@ -1643,7 +1643,7 @@ static int vhdx_create_new_region_table(BlockDriverState *bs, /* Populate enough of the BDRVVHDXState to be able to use the * pre-existing BAT calculation, translation, and update functions */ - s = g_malloc0(sizeof(BDRVVHDXState)); + s = g_new0(BDRVVHDXState, 1); s->chunk_ratio = (VHDX_MAX_SECTORS_PER_BLOCK) * (uint64_t) sector_size / (uint64_t) block_size; diff --git a/block/vmdk.c b/block/vmdk.c index 96a127d..19afa8f 100644 --- a/block/vmdk.c +++ b/block/vmdk.c @@ -233,7 +233,7 @@ static void vmdk_free_last_extent(BlockDriverState *bs) return; } s->num_extents--; - s->extents = g_realloc(s->extents, s->num_extents * sizeof(VmdkExtent)); + s->extents = g_renew(VmdkExtent, s->extents, s->num_extents); } static uint32_t vmdk_read_cid(BlockDriverState *bs, int parent) @@ -412,8 +412,7 @@ static int vmdk_add_extent(BlockDriverState *bs, return -EFBIG; } - s->extents = g_realloc(s->extents, - (s->num_extents + 1) * sizeof(VmdkExtent)); + s->extents = g_renew(VmdkExtent, s->extents, s->num_extents + 1); extent = &s->extents[s->num_extents]; s->num_extents++; @@ -489,7 +488,7 @@ static int vmdk_init_tables(BlockDriverState *bs, VmdkExtent *extent, } extent->l2_cache = - g_malloc(extent->l2_size * L2_CACHE_SIZE * sizeof(uint32_t)); + g_new(uint32_t, extent->l2_size * L2_CACHE_SIZE); return 0; fail_l1b: g_free(extent->l1_backup_table); diff --git a/block/vvfat.c b/block/vvfat.c index 8f5114b..f7ac28d 100644 --- a/block/vvfat.c +++ b/block/vvfat.c @@ -2947,7 +2947,7 @@ static int enable_write_target(BDRVVVFATState *s, Error **errp) bdrv_set_backing_hd(s->bs, bdrv_new("", &error_abort)); s->bs->backing_hd->drv = &vvfat_write_target; - s->bs->backing_hd->opaque = g_malloc(sizeof(void*)); + s->bs->backing_hd->opaque = g_new(void *, 1); *(void**)s->bs->backing_hd->opaque = s; return 0; diff --git a/blockdev-nbd.c b/blockdev-nbd.c index b60b66d..1d4cb57 100644 --- a/blockdev-nbd.c +++ b/blockdev-nbd.c @@ -103,7 +103,7 @@ void qmp_nbd_server_add(const char *device, bool has_writable, bool writable, nbd_export_set_name(exp, device); - n = g_malloc0(sizeof(NBDCloseNotifier)); + n = g_new0(NBDCloseNotifier, 1); n->n.notify = nbd_close_notifier; n->exp = exp; bdrv_add_close_notifier(bs, &n->n); diff --git a/blockdev.c b/blockdev.c index 8cc42fb..309fc49 100644 --- a/blockdev.c +++ b/blockdev.c @@ -1101,7 +1101,7 @@ SnapshotInfo *qmp_blockdev_snapshot_delete_internal_sync(const char *device, return NULL; } - info = g_malloc0(sizeof(SnapshotInfo)); + info = g_new0(SnapshotInfo, 1); info->id = g_strdup(sn.id_str); info->name = g_strdup(sn.name); info->date_nsec = sn.date_nsec; diff --git a/hw/ide/ahci.c b/hw/ide/ahci.c index e57c583..ed78382 100644 --- a/hw/ide/ahci.c +++ b/hw/ide/ahci.c @@ -1166,7 +1166,7 @@ void ahci_init(AHCIState *s, DeviceState *qdev, AddressSpace *as, int ports) s->as = as; s->ports = ports; - s->dev = g_malloc0(sizeof(AHCIDevice) * ports); + s->dev = g_new0(AHCIDevice, ports); ahci_reg_init(s); /* XXX BAR size should be 1k, but that breaks, so bump it to 4k for now */ memory_region_init_io(&s->mem, OBJECT(qdev), &ahci_mem_ops, s, diff --git a/qemu-img.c b/qemu-img.c index 1ad899e..10aa646 100644 --- a/qemu-img.c +++ b/qemu-img.c @@ -1326,7 +1326,7 @@ static int img_convert(int argc, char **argv) qemu_progress_print(0, 100); - bs = g_malloc0(bs_n * sizeof(BlockDriverState *)); + bs = g_new0(BlockDriverState *, bs_n); total_sectors = 0; for (bs_i = 0; bs_i < bs_n; bs_i++) { diff --git a/qemu-io.c b/qemu-io.c index 9fcd72b..fb6b34a 100644 --- a/qemu-io.c +++ b/qemu-io.c @@ -348,7 +348,7 @@ static void command_loop(void) static void add_user_command(char *optarg) { - cmdline = g_realloc(cmdline, ++ncmdline * sizeof(char *)); + cmdline = g_renew(char *, cmdline, ++ncmdline); cmdline[ncmdline-1] = optarg; } -- 1.9.3