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Commit f4aa0819 authored by Adrian Hunter's avatar Adrian Hunter Committed by Arnaldo Carvalho de Melo
Browse files

perf tools: Add Intel PT decoder 



Add support for decoding an Intel Processor Trace.

Intel PT trace data must be 'decoded' which involves walking the object
code and matching the trace data packets.

The decoder requests a buffer of binary data via a get_trace()
call-back, which it decodes using instruction information which it gets
via another call-back walk_insn().

Signed-off-by: default avatarAdrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/1437150840-31811-6-git-send-email-adrian.hunter@intel.com


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 53af9284

tools/perf/util/intel-pt-decoder/Build

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Original line number Diff line number Diff line 
libperf-$(CONFIG_AUXTRACE) += intel-pt-pkt-decoder.o intel-pt-insn-decoder.o intel-pt-log.o

libperf-$(CONFIG_AUXTRACE) += intel-pt-pkt-decoder.o intel-pt-insn-decoder.o intel-pt-log.o intel-pt-decoder.o



inat_tables_script = util/intel-pt-decoder/gen-insn-attr-x86.awk

inat_tables_maps = util/intel-pt-decoder/x86-opcode-map.txt

tools/perf/util/intel-pt-decoder/intel-pt-decoder.c

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File added.

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tools/perf/util/intel-pt-decoder/intel-pt-decoder.h

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Original line number Diff line number Diff line 
/*

 * intel_pt_decoder.h: Intel Processor Trace support

 * Copyright (c) 2013-2014, 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 INCLUDE__INTEL_PT_DECODER_H__

#define INCLUDE__INTEL_PT_DECODER_H__



#include <stdint.h>

#include <stddef.h>

#include <stdbool.h>



#include "intel-pt-insn-decoder.h"



#define INTEL_PT_IN_TX		(1 << 0)

#define INTEL_PT_ABORT_TX	(1 << 1)

#define INTEL_PT_ASYNC		(1 << 2)



enum intel_pt_sample_type {

	INTEL_PT_BRANCH		= 1 << 0,

	INTEL_PT_INSTRUCTION	= 1 << 1,

	INTEL_PT_TRANSACTION	= 1 << 2,

};



enum intel_pt_period_type {

	INTEL_PT_PERIOD_NONE,

	INTEL_PT_PERIOD_INSTRUCTIONS,

	INTEL_PT_PERIOD_TICKS,

};



enum {

	INTEL_PT_ERR_NOMEM = 1,

	INTEL_PT_ERR_INTERN,

	INTEL_PT_ERR_BADPKT,

	INTEL_PT_ERR_NODATA,

	INTEL_PT_ERR_NOINSN,

	INTEL_PT_ERR_MISMAT,

	INTEL_PT_ERR_OVR,

	INTEL_PT_ERR_LOST,

	INTEL_PT_ERR_UNK,

	INTEL_PT_ERR_NELOOP,

	INTEL_PT_ERR_MAX,

};



struct intel_pt_state {

	enum intel_pt_sample_type type;

	int err;

	uint64_t from_ip;

	uint64_t to_ip;

	uint64_t cr3;

	uint64_t timestamp;

	uint64_t est_timestamp;

	uint64_t trace_nr;

	uint32_t flags;

	enum intel_pt_insn_op insn_op;

	int insn_len;

};



struct intel_pt_insn;



struct intel_pt_buffer {

	const unsigned char *buf;

	size_t len;

	bool consecutive;

	uint64_t ref_timestamp;

	uint64_t trace_nr;

};



struct intel_pt_params {

	int (*get_trace)(struct intel_pt_buffer *buffer, void *data);

	int (*walk_insn)(struct intel_pt_insn *intel_pt_insn,

			 uint64_t *insn_cnt_ptr, uint64_t *ip, uint64_t to_ip,

			 uint64_t max_insn_cnt, void *data);

	void *data;

	bool return_compression;

	uint64_t period;

	enum intel_pt_period_type period_type;

	unsigned max_non_turbo_ratio;

};



struct intel_pt_decoder;



struct intel_pt_decoder *intel_pt_decoder_new(struct intel_pt_params *params);

void intel_pt_decoder_free(struct intel_pt_decoder *decoder);



const struct intel_pt_state *intel_pt_decode(struct intel_pt_decoder *decoder);



unsigned char *intel_pt_find_overlap(unsigned char *buf_a, size_t len_a,

				     unsigned char *buf_b, size_t len_b,

				     bool have_tsc);



int intel_pt__strerror(int code, char *buf, size_t buflen);



#endif