bpftool
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libbpf
Duplicated mess
Not a "bug" report because I cannot rule out that the problem isn't indeed my old goofy Samsung kernel source.
I have tried running both pahole and bpftool dump on the kernel image outputted by stock build - I doesnt generate btf info by default but I backported the link-vmlinux.sh patch that fixes that part. Both dumps from both programs contain strange duplicated struct blocks which of course is a headache to deal with the size of the file, manual cleanup scripts are not getting me there and often just make the problem worse even. I would love to know what it is I am seeing that is going wrong here - here's an example of the duplicated mess I see from a bpftool dump out/vmlinux
struct xdp_bulk_queue___2 {
struct xdp_frame___2 {
struct net_device___2 *dev_rx;
struct mutex___2 mutex;
spinlock_t___2 tx_completion_lock;
spinlock_t___2 xsk_list_lock;
int (*handler)(struct sk_buff___2 *);
int (*input_handler)(struct sk_buff___2 *, int, __be32, int);
int (*cb_handler)(struct sk_buff___2 *, int);
int (*err_handler)(struct sk_buff___2 *, u32);
int (*handler)(struct sk_buff___2 *);
int (*cb_handler)(struct sk_buff___2 *, int);
int (*err_handler)(struct sk_buff___2 *, struct inet6_skb_parm *, u8, u8, int, __be32);
int (*handler)(struct sk_buff___2 *);
int (*err_handler)(struct sk_buff___2 *, struct inet6_skb_parm *, u8, u8, int, __be32);
int (*callback)(struct sk_buff___2 *, u8, int);
struct module___2 *owner;
rwlock_t___2 lock;
struct module___2 *owner;
int (*handler)(struct sk_buff___2 *);
int (*err_handler)(struct sk_buff___2 *, u32);
struct module___2 *owner;
struct module___2 *owner;
spinlock_t___2 lock;
struct dentry___2 *root;
spinlock_t___2 lock;
struct mutex___2 mutex;
struct dentry___2 *debugfs_root;
struct dentry___2 *debugfs_slots;
struct dentry___2 *parent;
struct radix_tree_root___2 *trb_address_map;
struct dentry___2 *root;
struct radix_tree_root___2 trb_address_map;
struct module___2 *me;
struct module___2 *me;
struct module___2 *me;
struct rw_semaphore___2 init_lock;
spinlock_t___2 wb_limit_lock;
struct block_device___2 *bdev;
struct task_struct___2 *wbd;
spinlock_t___2 list_lock;
spinlock_t___2 wb_table_lock;
spinlock_t___2 bitmap_lock;
struct mutex___2 blk_bitmap_lock;
spinlock_t___2 lock;
struct page___2 *s_page;
struct page___2 *d_page;
struct wait_queue_head___2 migration_wait;
struct page___2 *first_page;
struct mutex___2 set_reg_lock;
struct mutex___2 set_lpmode_lock;
struct mutex___2 modechange;
struct mutex___2 work_lock;
struct mutex___2 raw_data_lock;
struct mutex___2 i2c_mutex;
struct mutex___2 sponge_mutex;
struct mutex___2 power_init;
struct mutex___2 lock;
typedef int (*bpf_op_t)(struct net_device___2 *, struct netdev_bpf *);
typedef void compound_page_dtor(struct page___2 *);
typedef void compound_page_dtor___2(struct page *);
typedef u32 (*coresight_read_fn___2)(const struct device___2 *, u32);
typedef struct vfsmount___2 * (*debugfs_automount_t)(struct dentry *, void *);
typedef void (*dr_release_t___2)(struct device___2 *, void *);
typedef int drm_ioctl_compat_t(struct file___2 *, unsigned int, long unsigned int);
typedef void elevator_exit_icq_fn___2(struct io_cq___2 *);
typedef void elevator_init_icq_fn___2(struct io_cq___2 *);
typedef int gifconf_func_t(struct net_device___2 *, char *, int, int);
typedef struct sk_buff___2 * (*gro_receive_sk_t)(struct sock *, struct list_head *, struct sk_buff___2 *);
typedef struct sk_buff___2 * (*gro_receive_t)(struct list_head *, struct sk_buff___2 *);
typedef struct sk_buff * (*gro_receive_t___2)(struct list_head *, struct sk_buff *);
typedef void (*hci_req_complete_skb_t___2)(struct hci_dev *, u8, u16, struct sk_buff___2 *);
typedef void (*hfi_cmd_response_callback)(enum hal_command_response___2, void *);
typedef void (*hfi_cmd_response_callback___2)(enum hal_command_response, void *);
typedef int (*initxattrs)(struct inode___2 *, const struct xattr *, void *);
typedef loff_t (*iomap_actor_t)(struct inode___2 *, loff_t, loff_t, void *, struct iomap *);
typedef int (*iommu_fault_handler_t___2)(struct iommu_domain *, struct device___2 *, long unsigned int, int, void *);
typedef void ip6_icmp_send_t(struct sk_buff___2 *, u8, u8, __u32, const struct in6_addr *);
typedef int (*iw_handler___2)(struct net_device___2 *, struct iw_request_info *, union iwreq_data *, char *);
typedef enum lru_status (*list_lru_walk_cb)(struct list_head *, struct list_lru_one *, spinlock_t___2 *, void *);
typedef enum lru_status (*list_lru_walk_cb___2)(struct list_head *, struct list_lru_one *, spinlock_t *, void *);
typedef unsigned int nf_hookfn___2(void *, struct sk_buff___2 *, const struct nf_hook_state *);
typedef void nf_logfn___2(struct net___2 *, u_int8_t, unsigned int, const struct sk_buff *, const struct net_device *, const struct net_device *, const struct nf_loginfo *, const char *);
typedef void nf_logfn___3(struct net *, u_int8_t, unsigned int, const struct sk_buff___2 *, const struct net_device___2 *, const struct net_device___2 *, const struct nf_loginfo *, const char *);
typedef struct ns_common___2 *ns_get_path_helper_t(void *);
typedef void perf_iterate_f(struct perf_event___2 *, void *);
typedef int (*pkt_func_def___2)(u32, void *, struct msm_vidc_cb_info *);
typedef struct rt6_info * (*pol_lookup_t)(struct net___2 *, struct fib6_table *, struct flowi6 *, const struct sk_buff *, int);
typedef void (*poll_queue_proc___3)(struct file *, wait_queue_head_t___2 *, struct poll_table_struct *);
typedef void (*poll_queue_proc___4)(struct file___2 *, wait_queue_head_t___2 *, struct poll_table_struct *);
typedef void (*poll_queue_proc___5)(struct file___2 *, wait_queue_head_t *, struct poll_table_struct *);
typedef int (*proc_visitor)(struct task_struct___2 *, void *);
typedef int (*proc_write_t___2)(struct file *, char *, size_t);
typedef int (*pte_fn_t)(pte_t *, pgtable_t___2, long unsigned int, void *);
typedef void (*radix_tree_update_node_t)(struct radix_tree_node___2 *);
typedef void (*radix_tree_update_node_t___2)(struct radix_tree_node *);
typedef int (*request_key_actor_t___2)(struct key___2 *, void *);
typedef enum sctp_disposition sctp_state_fn_t___2(struct net *, const struct sctp_endpoint *, const struct sctp_association *, const union sctp_subtype, void *, struct sctp_cmd_seq *);
typedef u16 (*select_queue_fallback_t___3)(struct net_device___2 *, struct sk_buff *, struct net_device___2 *);
typedef int (*sk_read_actor_t___2)(read_descriptor_t *, struct sk_buff___2 *, unsigned int, size_t);
typedef int splice_actor(struct pipe_inode_info___2 *, struct pipe_buffer *, struct splice_desc *);
typedef int splice_direct_actor(struct pipe_inode_info___2 *, struct splice_desc *);
typedef void tcf_chain_head_change_t___2(struct tcf_proto___2 *, void *);
typedef struct sock * (*udp_lookup_t)(struct sk_buff___2 *, __be16, __be16);
typedef int (*wext_ioctl_func)(struct net_device___2 *, struct iwreq *, unsigned int, struct iw_request_info *, iw_handler___2);
pahole dump/compile/nearly every other switch combo makes a file without these dups but with broken enums like
struct TransportAddress {
enum {
eTransportAddress_ipAddress = 0,
eTransportAddress_ipSourceRoute = 1,
eTransportAddress_ipxAddress = 2,
eTransportAddress_ip6Address = 3,
eTransportAddress_netBios = 4,
eTransportAddress_nsap = 5,
eTransportAddress_nonStandardAddress = 6,
} choice; /* 0 4 */
enum {
eTransportAddress_ipAddress = 0,
eTransportAddress_ipSourceRoute = 1,
eTransportAddress_ipxAddress = 2,
eTransportAddress_ip6Address = 3,
eTransportAddress_netBios = 4,
eTransportAddress_nsap = 5,
eTransportAddress_nonStandardAddress = 6,
};
union {
TransportAddress_ipAddress ipAddress; /* 4 8 */
TransportAddress_ip6Address ip6Address; /* 4 8 */
}; /* 4 8 */
union {
TransportAddress_ipAddress ipAddress; /* 0 8 */
TransportAddress_ip6Address ip6Address; /* 0 8 */
};
/* size: 12, cachelines: 1, members: 2 */
/* last cacheline: 12 bytes */
};
typedef struct TransportAddress TransportAddress;
so either way I've a massive headache to deal with. Before I go debugging 200k lines line by line all week - is there something I am doing wrong here re: generating the BTF section in the CONFIG_DEBUG_INFO enabled kernel? Let me know if there is some files I could attach for your review.
Look forward to hearing back from someone more knowledgeable!
