/* SPDX-License-Identifier: GPL-2.0-only */
/*
* thread - stack . h : Synthesize a thread ' s stack using call / return events
* Copyright ( c ) 2014 , Intel Corporation .
*/
#ifndef __PERF_THREAD_STACK_H
#define __PERF_THREAD_STACK_H
#include <sys/types.h>
#include <linux/types.h>
struct thread;
struct comm;
struct ip_callchain;
struct symbol;
struct dso;
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 '
* CALL_RETURN_NON_CALL : a branch but not a ' call ' to the start of a different
* symbol
*/
enum {
CALL_RETURN_NO_CALL = 1 << 0 ,
CALL_RETURN_NO_RETURN = 1 << 1 ,
CALL_RETURN_NON_CALL = 1 << 2 ,
};
/**
* 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
* @ insn_count : approx . number of instructions between call and return
* @ cyc_count : approx . number of cycles 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
* @ parent_db_id : id of parent call 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 insn_count;
u64 cyc_count;
u64 call_ref;
u64 return_ref;
u64 db_id;
u64 parent_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, u64 *parent_db_id, void *data);
void *data;
};
int thread_stack__event(struct thread *thread, int cpu, u32 flags, u64 from_ip,
u64 to_ip, u16 insn_len, u64 trace_nr, bool callstack,
unsigned int br_stack_sz, bool mispred_all);
void thread_stack__set_trace_nr(struct thread *thread, int cpu, u64 trace_nr);
void thread_stack__sample(struct thread *thread, int cpu, struct ip_callchain *chain,
size_t sz, u64 ip, u64 kernel_start);
void thread_stack__sample_late(struct thread *thread, int cpu,
struct ip_callchain *chain, size_t sz, u64 ip,
u64 kernel_start);
void thread_stack__br_sample(struct thread *thread, int cpu,
struct branch_stack *dst, unsigned int sz);
void thread_stack__br_sample_late(struct thread *thread, int cpu,
struct branch_stack *dst, unsigned int sz,
u64 sample_ip, u64 kernel_start);
int thread_stack__flush(struct thread *thread);
void thread_stack__free(struct thread *thread);
size_t thread_stack__depth(struct thread *thread, int cpu);
struct call_return_processor *
call_return_processor__new(int (*process)(struct call_return *cr, u64 *parent_db_id, 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
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