Re: [PATCH -tip 6/7] perf probe: Show accessible global variables
From: Arnaldo Carvalho de Melo
Date: Thu Oct 21 2010 - 16:51:21 EST
Em Thu, Oct 21, 2010 at 07:13:35PM +0900, Masami Hiramatsu escreveu:
> Add --externs for allowing --vars to show accessible
> global(externally defined) variables from a given probe
> point too.
> This will give you a hint which globals can be accessible
> from the probe point.
Cool, but perhaps we need to filter out some of the globals? Things
like:
long unsigned int __kcrctab_tcp_hashinfo
long unsigned int __kcrctab_tcp_proc_register
long unsigned int __kcrctab_tcp_proc_unregister
long unsigned int __kcrctab_tcp_prot
If --verbose is specified we could then show everything.
So that it doesn't get this long:
[root@emilia ~]# perf probe -V tcp_v4_do_rcv:28 --externs
Available variables at tcp_v4_do_rcv:28
@<tcp_v4_do_rcv+390>
(function_type)* ip_nat_decode_session
(unknown_type) __crc_ipv4_specific
(unknown_type) __crc_sysctl_tcp_low_latency
(unknown_type) __crc_tcp4_gro_complete
(unknown_type) __crc_tcp4_gro_receive
(unknown_type) __crc_tcp_hashinfo
(unknown_type) __crc_tcp_proc_register
(unknown_type) __crc_tcp_proc_unregister
(unknown_type) __crc_tcp_prot
(unknown_type) __crc_tcp_twsk_unique
(unknown_type) __crc_tcp_v4_conn_request
(unknown_type) __crc_tcp_v4_connect
(unknown_type) __crc_tcp_v4_destroy_sock
(unknown_type) __crc_tcp_v4_do_rcv
(unknown_type) __crc_tcp_v4_md5_do_add
(unknown_type) __crc_tcp_v4_md5_do_del
(unknown_type) __crc_tcp_v4_md5_hash_skb
(unknown_type) __crc_tcp_v4_md5_lookup
(unknown_type) __crc_tcp_v4_remember_stamp
(unknown_type) __crc_tcp_v4_send_check
(unknown_type) __crc_tcp_v4_syn_recv_sock
__u8* ip_tos2prio
atomic_long_t* vm_stat
atomic_t tcp_memory_allocated
bool c1e_detected
char __pcpu_scope_cpu_core_map
char __pcpu_scope_cpu_info
char __pcpu_scope_cpu_llc_id
char __pcpu_scope_cpu_number
char __pcpu_scope_cpu_sibling_map
char __pcpu_scope_current_task
char __pcpu_scope_init_tss
char __pcpu_scope_irq_count
char __pcpu_scope_irq_regs
char __pcpu_scope_irq_stack_ptr
char __pcpu_scope_irq_stack_union
char __pcpu_scope_irq_stat
char __pcpu_scope_kernel_stack
char __pcpu_scope_numa_node
char __pcpu_scope_orig_ist
char __pcpu_scope_process_counts
char __pcpu_scope_softirq_work_list
char __pcpu_scope_softnet_data
char __pcpu_scope_this_cpu_off
char __pcpu_scope_tick_cpu_device
char __pcpu_scope_vector_irq
char __pcpu_scope_vm_event_states
char __pcpu_scope_x2apic_extra_bits
char __pcpu_scope_x86_bios_cpu_apicid
char __pcpu_scope_x86_cpu_to_apicid
char __pcpu_scope_x86_cpu_to_node_map
char* __kstrtab_ipv4_specific
char* __kstrtab_sysctl_tcp_low_latency
char* __kstrtab_tcp4_gro_complete
char* __kstrtab_tcp4_gro_receive
char* __kstrtab_tcp_hashinfo
char* __kstrtab_tcp_proc_register
char* __kstrtab_tcp_proc_unregister
char* __kstrtab_tcp_prot
char* __kstrtab_tcp_twsk_unique
char* __kstrtab_tcp_v4_conn_request
char* __kstrtab_tcp_v4_connect
char* __kstrtab_tcp_v4_destroy_sock
char* __kstrtab_tcp_v4_do_rcv
char* __kstrtab_tcp_v4_md5_do_add
char* __kstrtab_tcp_v4_md5_do_del
char* __kstrtab_tcp_v4_md5_hash_skb
char* __kstrtab_tcp_v4_md5_lookup
char* __kstrtab_tcp_v4_remember_stamp
char* __kstrtab_tcp_v4_send_check
char* __kstrtab_tcp_v4_syn_recv_sock
char* hex_asc
char* inet_csk_timer_bug_msg
cpumask_var_t cpu_callout_mask
cpumask_var_t cpu_core_map
cpumask_var_t cpu_sibling_map
cpumask_var_t* node_to_cpumask_map
int acpi_disabled
int acpi_noirq
int acpi_pci_disabled
int audit_enabled
int cpu_number
int debug_locks
int disable_apic
int net_msg_warn
int nr_cpu_ids
int nr_online_nodes
int numa_node
int page_group_by_mobility_disabled
int percpu_counter_batch
int prof_on
int sched_mc_power_savings
int sched_smt_power_savings
int smp_found_config
int sysctl_max_syn_backlog
int sysctl_tcp_adv_win_scale
int sysctl_tcp_cookie_size
int sysctl_tcp_ecn
int sysctl_tcp_fin_timeout
int sysctl_tcp_keepalive_intvl
int sysctl_tcp_keepalive_probes
int sysctl_tcp_keepalive_time
int sysctl_tcp_low_latency
int sysctl_tcp_max_orphans
int sysctl_tcp_reordering
int sysctl_tcp_syncookies
int sysctl_tcp_tw_reuse
int tcp_memory_pressure
int time_status
int timer_stats_active
int x2apic_phys
int x86_cpu_to_node_map
int* console_printk
int* sysctl_tcp_mem
int* sysctl_tcp_rmem
int* sysctl_tcp_wmem
int* x86_cpu_to_node_map_early_ptr
irq_cpustat_t irq_stat
long unsigned int __kcrctab_ipv4_specific
long unsigned int __kcrctab_sysctl_tcp_low_latency
long unsigned int __kcrctab_tcp4_gro_complete
long unsigned int __kcrctab_tcp4_gro_receive
long unsigned int __kcrctab_tcp_hashinfo
long unsigned int __kcrctab_tcp_proc_register
long unsigned int __kcrctab_tcp_proc_unregister
long unsigned int __kcrctab_tcp_prot
long unsigned int __kcrctab_tcp_twsk_unique
long unsigned int __kcrctab_tcp_v4_conn_request
long unsigned int __kcrctab_tcp_v4_connect
long unsigned int __kcrctab_tcp_v4_destroy_sock
long unsigned int __kcrctab_tcp_v4_do_rcv
long unsigned int __kcrctab_tcp_v4_md5_do_add
long unsigned int __kcrctab_tcp_v4_md5_do_del
long unsigned int __kcrctab_tcp_v4_md5_hash_skb
long unsigned int __kcrctab_tcp_v4_md5_lookup
long unsigned int __kcrctab_tcp_v4_remember_stamp
long unsigned int __kcrctab_tcp_v4_send_check
long unsigned int __kcrctab_tcp_v4_syn_recv_sock
long unsigned int jiffies
long unsigned int kernel_stack
long unsigned int mmap_min_addr
long unsigned int mmu_cr4_features
long unsigned int* __per_cpu_offset
long unsigned int* cpu_bit_bitmap
long unsigned int* sysctl_local_reserved_ports
nodemask_t* node_states
pg_data_t** node_data
physid_mask_t phys_cpu_present_map
pteval_t __supported_pte_mask
spinlock_t dcache_lock
struct address_space swapper_space
struct apic* apic
struct cache_sizes* malloc_sizes
struct cpuinfo_x86 boot_cpu_data
struct cpuinfo_x86 cpu_info
struct cpumask* cpu_online_mask
struct cpumask* cpu_possible_mask
struct cpumask* cpu_present_mask
struct device x86_dma_fallback_dev
struct dma_map_ops* dma_ops
struct dqstats dqstats
struct icmp_err* icmp_err_convert
struct inet_connection_sock_af_ops ipv4_specific
struct inet_hashinfo tcp_hashinfo
struct inet_timewait_death_row tcp_death_row
struct kernel_symbol __ksymtab_ipv4_specific
struct kernel_symbol __ksymtab_sysctl_tcp_low_latency
struct kernel_symbol __ksymtab_tcp4_gro_complete
struct kernel_symbol __ksymtab_tcp4_gro_receive
struct kernel_symbol __ksymtab_tcp_hashinfo
struct kernel_symbol __ksymtab_tcp_proc_register
struct kernel_symbol __ksymtab_tcp_proc_unregister
struct kernel_symbol __ksymtab_tcp_prot
struct kernel_symbol __ksymtab_tcp_twsk_unique
struct kernel_symbol __ksymtab_tcp_v4_conn_request
struct kernel_symbol __ksymtab_tcp_v4_connect
struct kernel_symbol __ksymtab_tcp_v4_destroy_sock
struct kernel_symbol __ksymtab_tcp_v4_do_rcv
struct kernel_symbol __ksymtab_tcp_v4_md5_do_add
struct kernel_symbol __ksymtab_tcp_v4_md5_do_del
struct kernel_symbol __ksymtab_tcp_v4_md5_hash_skb
struct kernel_symbol __ksymtab_tcp_v4_md5_lookup
struct kernel_symbol __ksymtab_tcp_v4_remember_stamp
struct kernel_symbol __ksymtab_tcp_v4_send_check
struct kernel_symbol __ksymtab_tcp_v4_syn_recv_sock
struct list_head* nf_hooks
struct mem_section** mem_section
struct memnode memnode
struct neigh_table nd_tbl
struct nf_afinfo** nf_afinfo
struct percpu_counter tcp_orphan_count
struct percpu_counter tcp_sockets_allocated
struct pernet_operations tcp4_net_ops
struct pernet_operations tcp_sk_ops
struct pglist_data** node_data
struct pid* cad_pid
struct pid_namespace init_pid_ns
struct proto tcp_prot
struct pt_regs* irq_regs
struct pv_apic_ops pv_apic_ops
struct pv_cpu_ops pv_cpu_ops
struct pv_info pv_info
struct pv_irq_ops pv_irq_ops
struct pv_mmu_ops pv_mmu_ops
struct pv_time_ops pv_time_ops
struct request_sock_ops tcp_request_sock_ops
struct resource ioport_resource
struct rps_sock_flow_table* rps_sock_flow_table
struct sk_buff* skb
struct smp_ops smp_ops
struct sock* sk
struct task_struct* current_task
struct tcp_congestion_ops tcp_init_congestion_ops
struct tcp_request_sock_ops tcp_request_sock_ipv4_ops
struct tcp_seq_afinfo tcp4_seq_afinfo
struct tcp_sock_af_ops tcp_sock_ipv4_specific
struct timewait_sock_ops tcp_timewait_sock_ops
struct tracepoint __tracepoint_irq_handler_entry
struct tracepoint __tracepoint_irq_handler_exit
struct tracepoint __tracepoint_kfree
struct tracepoint __tracepoint_kmalloc
struct tracepoint __tracepoint_kmalloc_node
struct tracepoint __tracepoint_kmem_cache_alloc
struct tracepoint __tracepoint_kmem_cache_alloc_node
struct tracepoint __tracepoint_kmem_cache_free
struct tracepoint __tracepoint_mm_page_alloc
struct tracepoint __tracepoint_mm_page_alloc_extfrag
struct tracepoint __tracepoint_mm_page_alloc_zone_locked
struct tracepoint __tracepoint_mm_page_free_direct
struct tracepoint __tracepoint_mm_page_pcpu_drain
struct tracepoint __tracepoint_mm_pagevec_free
struct tracepoint __tracepoint_module_free
struct tracepoint __tracepoint_module_get
struct tracepoint __tracepoint_module_load
struct tracepoint __tracepoint_module_put
struct tracepoint __tracepoint_module_request
struct tracepoint __tracepoint_softirq_entry
struct tracepoint __tracepoint_softirq_exit
struct tracepoint __tracepoint_softirq_raise
struct vm_event_state vm_event_states
struct x86_init_ops x86_init
struct x86_platform_ops x86_platform
u16 x86_bios_cpu_apicid
u32 inet_ehash_secret
union irq_stack_union irq_stack_union
unsigned int apic_verbosity
unsigned int sysctl_timer_migration
- Arnaldo
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