error can't allocate region

本文探讨了Xcode中遇到的“errorcan'tallocateregion”错误及其解决方案。此错误通常表明程序试图分配内存但因资源不足而失败,可能的原因包括内存泄漏或无限循环等问题。了解如何排查此类问题对于避免程序崩溃至关重要。

摘要生成于 C知道 ,由 DeepSeek-R1 满血版支持, 前往体验 >

error can't allocate region 程序运行报错,在xcode中则会发出“SIGABRT”信号来终止程序。

原因是程序运行内存不足,欲申请空间得不到分配。

此时可以查找程序是否出现程序一直申请内存,出现死循环.

SIGABRT 程序自己发现错误并调用abort来终止程序.

可能是程序没有内存可分配导致,运行终止.

// Configuration provided during initialization of the littlefs struct lfs_config { // Opaque user provided context that can be used to pass // information to the block device operations void *context; // Read a region in a block. Negative error codes are propagated // to the user. int (*read)(const struct lfs_config *c, lfs_block_t block, lfs_off_t off, void *buffer, lfs_size_t size); // Program a region in a block. The block must have previously // been erased. Negative error codes are propagated to the user. // May return LFS_ERR_CORRUPT if the block should be considered bad. int (*prog)(const struct lfs_config *c, lfs_block_t block, lfs_off_t off, const void *buffer, lfs_size_t size); // Erase a block. A block must be erased before being programmed. // The state of an erased block is undefined. Negative error codes // are propagated to the user. // May return LFS_ERR_CORRUPT if the block should be considered bad. int (*erase)(const struct lfs_config *c, lfs_block_t block); // Sync the state of the underlying block device. Negative error codes // are propagated to the user. int (*sync)(const struct lfs_config *c); #ifdef LFS_THREADSAFE // Lock the underlying block device. Negative error codes // are propagated to the user. int (*lock)(const struct lfs_config *c); // Unlock the underlying block device. Negative error codes // are propagated to the user. int (*unlock)(const struct lfs_config *c); #endif // Minimum size of a block read in bytes. All read operations will be a // multiple of this value. lfs_size_t read_size; // Minimum size of a block program in bytes. All program operations will be // a multiple of this value. lfs_size_t prog_size; // Size of an erasable block in bytes. This does not impact ram consumption // and may be larger than the physical erase size. However, non-inlined // files take up at minimum one block. Must be a multiple of the read and // program sizes. lfs_size_t block_size; // Number of erasable blocks on the device. Defaults to block_count stored // on disk when zero. lfs_size_t block_count; // Number of erase cycles before littlefs evicts metadata logs and moves // the metadata to another block. Suggested values are in the // range 100-1000, with large values having better performance at the cost // of less consistent wear distribution. // // Set to -1 to disable block-level wear-leveling. int32_t block_cycles; // Size of block caches in bytes. Each cache buffers a portion of a block in // RAM. The littlefs needs a read cache, a program cache, and one additional // cache per file. Larger caches can improve performance by storing more // data and reducing the number of disk accesses. Must be a multiple of the // read and program sizes, and a factor of the block size. lfs_size_t cache_size; // Size of the lookahead buffer in bytes. A larger lookahead buffer // increases the number of blocks found during an allocation pass. The // lookahead buffer is stored as a compact bitmap, so each byte of RAM // can track 8 blocks. lfs_size_t lookahead_size; // Threshold for metadata compaction during lfs_fs_gc in bytes. Metadata // pairs that exceed this threshold will be compacted during lfs_fs_gc. // Defaults to ~88% block_size when zero, though the default may change // in the future. // // Note this only affects lfs_fs_gc. Normal compactions still only occur // when full. // // Set to -1 to disable metadata compaction during lfs_fs_gc. lfs_size_t compact_thresh; // Optional statically allocated read buffer. Must be cache_size. // By default lfs_malloc is used to allocate this buffer. void *read_buffer; // Optional statically allocated program buffer. Must be cache_size. // By default lfs_malloc is used to allocate this buffer. void *prog_buffer; // Optional statically allocated lookahead buffer. Must be lookahead_size. // By default lfs_malloc is used to allocate this buffer. void *lookahead_buffer; // Optional upper limit on length of file names in bytes. No downside for // larger names except the size of the info struct which is controlled by // the LFS_NAME_MAX define. Defaults to LFS_NAME_MAX or name_max stored on // disk when zero. lfs_size_t name_max; // Optional upper limit on files in bytes. No downside for larger files // but must be <= LFS_FILE_MAX. Defaults to LFS_FILE_MAX or file_max stored // on disk when zero. lfs_size_t file_max; // Optional upper limit on custom attributes in bytes. No downside for // larger attributes size but must be <= LFS_ATTR_MAX. Defaults to // LFS_ATTR_MAX or attr_max stored on disk when zero. lfs_size_t attr_max; // Optional upper limit on total space given to metadata pairs in bytes. On // devices with large blocks (e.g. 128kB) setting this to a low size (2-8kB) // can help bound the metadata compaction time. Must be <= block_size. // Defaults to block_size when zero. lfs_size_t metadata_max; // Optional upper limit on inlined files in bytes. Inlined files live in // metadata and decrease storage requirements, but may be limited to // improve metadata-related performance. Must be <= cache_size, <= // attr_max, and <= block_size/8. Defaults to the largest possible // inline_max when zero. // // Set to -1 to disable inlined files. lfs_size_t inline_max; #ifdef LFS_MULTIVERSION // On-disk version to use when writing in the form of 16-bit major version // + 16-bit minor version. This limiting metadata to what is supported by // older minor versions. Note that some features will be lost. Defaults to // to the most recent minor version when zero. uint32_t disk_version; #endif }; litterfs的这个context有什么用 目前litterfs的代码中没有看到有使用到的地方
最新发布
06-28
hdev->iommu_listener = (MemoryListener) { .name = "vhost-iommu", .region_add = vhost_iommu_region_add, .region_del = vhost_iommu_region_del, }; if (hdev->migration_blocker == NULL) { if (!(hdev->features & (0x1ULL << VHOST_F_LOG_ALL))) { error_setg(&hdev->migration_blocker, "Migration disabled: vhost lacks VHOST_F_LOG_ALL feature."); } else if (vhost_dev_log_is_shared(hdev) && !qemu_memfd_alloc_check()) { error_setg(&hdev->migration_blocker, "Migration disabled: failed to allocate shared memory"); } } if (hdev->migration_blocker != NULL) { r = migrate_add_blocker_normal(&hdev->migration_blocker, errp); if (r < 0) { goto fail_busyloop; } } hdev->mem = g_malloc0(offsetof(struct vhost_memory, regions)); hdev->n_mem_sections = 0; hdev->mem_sections = NULL; hdev->log = NULL; hdev->log_size = 0; hdev->log_enabled = false; hdev->started = false; memory_listener_register(&hdev->memory_listener, &address_space_memory); QLIST_INSERT_HEAD(&vhost_devices, hdev, entry); /* * The listener we registered properly updated the corresponding counter. * So we can trust that these values are accurate. */ if (hdev->vhost_ops->vhost_backend_no_private_memslots && hdev->vhost_ops->vhost_backend_no_private_memslots(hdev)) { used = used_shared_memslots; } else { used = used_memslots; } /* * We assume that all reserved memslots actually require a real memslot * in our vhost backend. This might not be true, for example, if the * memslot would be ROM. If ever relevant, we can optimize for that -- * but we'll need additional information about the reservations. */ reserved = memory_devices_get_reserved_memslots(); if (used + reserved > limit) { error_setg(errp, "vhost backend memory slots limit (%d) is less" " than current number of used (%d) and reserved (%d)" " memory slots for memory devices.", limit, used, reserved); r = -EINVAL; goto fail_busyloop; } return 0; fail_busyloop: if (busyloop_timeout) { while (--i >= 0) { vhost_virtqueue_set_busyloop_timeout(hdev, hdev->vq_index + i, 0); } } fail: hdev->nvqs = n_initialized_vqs; vhost_dev_cleanup(hdev); return r; }
03-26
评论
添加红包

请填写红包祝福语或标题

红包个数最小为10个

红包金额最低5元

当前余额3.43前往充值 >
需支付:10.00
成就一亿技术人!
领取后你会自动成为博主和红包主的粉丝 规则
hope_wisdom
发出的红包
实付
使用余额支付
点击重新获取
扫码支付
钱包余额 0

抵扣说明:

1.余额是钱包充值的虚拟货币,按照1:1的比例进行支付金额的抵扣。
2.余额无法直接购买下载,可以购买VIP、付费专栏及课程。

余额充值