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