/* * thread-stack.h: Synthesize a thread's stack using call / return events * Copyright (c) 2014, Intel Corporation. * * This program is free software; you can redistribute it and/or modify it * under the terms and conditions of the GNU General Public License, * version 2, as published by the Free Software Foundation. * * This program is distributed in the hope it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for * more details. * */ #ifndef __PERF_THREAD_STACK_H #define __PERF_THREAD_STACK_H #include #include struct thread; struct comm; struct ip_callchain; struct symbol; struct dso; struct comm; struct perf_sample; struct addr_location; struct call_path; /* * Call/Return flags. * * CALL_RETURN_NO_CALL: 'return' but no matching 'call' * CALL_RETURN_NO_RETURN: 'call' but no matching 'return' */ enum { CALL_RETURN_NO_CALL = 1 << 0, CALL_RETURN_NO_RETURN = 1 << 1, }; /** * struct call_return - paired call/return information. * @thread: thread in which call/return occurred * @comm: comm in which call/return occurred * @cp: call path * @call_time: timestamp of call (if known) * @return_time: timestamp of return (if known) * @branch_count: number of branches seen between call and return * @call_ref: external reference to 'call' sample (e.g. db_id) * @return_ref: external reference to 'return' sample (e.g. db_id) * @db_id: id used for db-export * @flags: Call/Return flags */ struct call_return { struct thread *thread; struct comm *comm; struct call_path *cp; u64 call_time; u64 return_time; u64 branch_count; u64 call_ref; u64 return_ref; u64 db_id; u32 flags; }; /** * struct call_return_processor - provides a call-back to consume call-return * information. * @cpr: call path root * @process: call-back that accepts call/return information * @data: anonymous data for call-back */ struct call_return_processor { struct call_path_root *cpr; int (*process)(struct call_return *cr, void *data); void *data; }; int thread_stack__event(struct thread *thread, u32 flags, u64 from_ip, u64 to_ip, u16 insn_len, u64 trace_nr); void thread_stack__set_trace_nr(struct thread *thread, u64 trace_nr); void thread_stack__sample(struct thread *thread, struct ip_callchain *chain, size_t sz, u64 ip); int thread_stack__flush(struct thread *thread); void thread_stack__free(struct thread *thread); size_t thread_stack__depth(struct thread *thread); struct call_return_processor * call_return_processor__new(int (*process)(struct call_return *cr, void *data), void *data); void call_return_processor__free(struct call_return_processor *crp); int thread_stack__process(struct thread *thread, struct comm *comm, struct perf_sample *sample, struct addr_location *from_al, struct addr_location *to_al, u64 ref, struct call_return_processor *crp); #endif 2f4201d39e5cf43a8709a047e481f5723fdc'>net/ipv4/fib_frontend.c

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