pmcpl_annotate_cg.c revision 330449 
1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2005-2007, Joseph Koshy
5 * Copyright (c) 2007 The FreeBSD Foundation
6 * Copyright (c) 2014, Adrian Chadd, Netflix Inc.
7 * All rights reserved.
8 *
9 * Portions of this software were developed by A. Joseph Koshy under
10 * sponsorship from the FreeBSD Foundation and Google, Inc.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 *    notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 *    notice, this list of conditions and the following disclaimer in the
19 *    documentation and/or other materials provided with the distribution.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34/*
35 * Transform a hwpmc(4) log into human readable form, and into
36 * gprof(1) compatible profiles.
37 */
38
39#include <sys/cdefs.h>
40__FBSDID("$FreeBSD: stable/11/usr.sbin/pmcstat/pmcpl_annotate_cg.c 330449 2018-03-05 07:26:05Z eadler $");
41
42#include <sys/param.h>
43#include <sys/endian.h>
44#include <sys/gmon.h>
45#include <sys/imgact_aout.h>
46#include <sys/imgact_elf.h>
47#include <sys/mman.h>
48#include <sys/pmc.h>
49#include <sys/queue.h>
50#include <sys/socket.h>
51#include <sys/stat.h>
52#include <sys/wait.h>
53
54#include <netinet/in.h>
55
56#include <assert.h>
57#include <err.h>
58#include <errno.h>
59#include <fcntl.h>
60#include <gelf.h>
61#include <libgen.h>
62#include <limits.h>
63#include <netdb.h>
64#include <pmc.h>
65#include <pmclog.h>
66#include <sysexits.h>
67#include <stdint.h>
68#include <stdio.h>
69#include <stdlib.h>
70#include <string.h>
71#include <unistd.h>
72
73#include "pmcstat.h"
74#include "pmcstat_log.h"
75#include "pmcpl_annotate_cg.h"
76
77/*
78 * Record a callchain.
79 */
80
81void
82pmcpl_annotate_cg_process(struct pmcstat_process *pp, struct pmcstat_pmcrecord *pmcr,
83    uint32_t nsamples, uintfptr_t *cc, int usermode, uint32_t cpu)
84{
85	struct pmcstat_pcmap *map;
86	struct pmcstat_symbol *sym;
87	uintfptr_t newpc;
88	struct pmcstat_image *image;
89	int i;
90	char filename[PATH_MAX], funcname[PATH_MAX];
91	unsigned sline;
92
93	(void) pmcr; (void) nsamples; (void) usermode; (void) cpu;
94
95	for (i = 0; i < (int) nsamples; i++) {
96		map = NULL;
97		sym = NULL;
98		image = NULL;
99		filename[0] = '\0';
100		funcname[0] = '\0';
101		sline = 0;
102
103		map = pmcstat_process_find_map(usermode ? pp : pmcstat_kernproc, cc[i]);
104		if (map != NULL) {
105			assert(cc[i] >= map->ppm_lowpc && cc[i] < map->ppm_highpc);
106			image = map->ppm_image;
107			newpc = cc[i] - (map->ppm_lowpc +
108				(image->pi_vaddr - image->pi_start));
109			sym = pmcstat_symbol_search(image, newpc);
110		}
111
112		if (map != NULL && image != NULL && sym != NULL) {
113			(void) pmcstat_image_addr2line(image, cc[i],
114			    filename, sizeof(filename), &sline, funcname, sizeof(funcname));
115		}
116
117		if (map != NULL && sym != NULL) {
118			fprintf(args.pa_graphfile, "%p %s %s:%d\n",
119			    (void *)cc[i],
120			    funcname,
121			    filename,
122			    sline);
123		} else {
124			fprintf(args.pa_graphfile, "%p <unknown> ??:0\n",
125			    (void *) cc[i]);
126		}
127	}
128	fprintf(args.pa_graphfile, "--\n");
129}
130