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2025cf9e19
Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 263 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190529141901.208660670@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
99 lines
2.9 KiB
C
99 lines
2.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* thread-stack.h: Synthesize a thread's stack using call / return events
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* Copyright (c) 2014, Intel Corporation.
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*/
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#ifndef __PERF_THREAD_STACK_H
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#define __PERF_THREAD_STACK_H
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#include <sys/types.h>
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#include <linux/types.h>
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struct thread;
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struct comm;
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struct ip_callchain;
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struct symbol;
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struct dso;
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struct comm;
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struct perf_sample;
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struct addr_location;
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struct call_path;
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/*
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* Call/Return flags.
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*
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* CALL_RETURN_NO_CALL: 'return' but no matching 'call'
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* CALL_RETURN_NO_RETURN: 'call' but no matching 'return'
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* CALL_RETURN_NON_CALL: a branch but not a 'call' to the start of a different
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* symbol
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*/
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enum {
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CALL_RETURN_NO_CALL = 1 << 0,
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CALL_RETURN_NO_RETURN = 1 << 1,
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CALL_RETURN_NON_CALL = 1 << 2,
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};
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/**
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* struct call_return - paired call/return information.
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* @thread: thread in which call/return occurred
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* @comm: comm in which call/return occurred
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* @cp: call path
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* @call_time: timestamp of call (if known)
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* @return_time: timestamp of return (if known)
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* @branch_count: number of branches seen between call and return
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* @call_ref: external reference to 'call' sample (e.g. db_id)
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* @return_ref: external reference to 'return' sample (e.g. db_id)
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* @db_id: id used for db-export
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* @parent_db_id: id of parent call used for db-export
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* @flags: Call/Return flags
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*/
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struct call_return {
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struct thread *thread;
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struct comm *comm;
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struct call_path *cp;
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u64 call_time;
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u64 return_time;
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u64 branch_count;
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u64 call_ref;
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u64 return_ref;
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u64 db_id;
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u64 parent_db_id;
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u32 flags;
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};
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/**
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* struct call_return_processor - provides a call-back to consume call-return
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* information.
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* @cpr: call path root
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* @process: call-back that accepts call/return information
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* @data: anonymous data for call-back
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*/
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struct call_return_processor {
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struct call_path_root *cpr;
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int (*process)(struct call_return *cr, u64 *parent_db_id, void *data);
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void *data;
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};
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int thread_stack__event(struct thread *thread, int cpu, u32 flags, u64 from_ip,
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u64 to_ip, u16 insn_len, u64 trace_nr);
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void thread_stack__set_trace_nr(struct thread *thread, int cpu, u64 trace_nr);
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void thread_stack__sample(struct thread *thread, int cpu, struct ip_callchain *chain,
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size_t sz, u64 ip, u64 kernel_start);
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int thread_stack__flush(struct thread *thread);
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void thread_stack__free(struct thread *thread);
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size_t thread_stack__depth(struct thread *thread, int cpu);
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struct call_return_processor *
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call_return_processor__new(int (*process)(struct call_return *cr, u64 *parent_db_id, void *data),
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void *data);
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void call_return_processor__free(struct call_return_processor *crp);
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int thread_stack__process(struct thread *thread, struct comm *comm,
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struct perf_sample *sample,
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struct addr_location *from_al,
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struct addr_location *to_al, u64 ref,
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struct call_return_processor *crp);
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#endif
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