xref: /freebsd/usr.sbin/pmcstat/pmcpl_annotate_cg.c (revision e1e636193db45630c7881246d25902e57c43d24e)
1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
3  *
4  * Copyright (c) 2005-2007, Joseph Koshy
5  * Copyright (c) 2007 The FreeBSD Foundation
6  * All rights reserved.
7  *
8  * Copyright (c) 2014 Netflix, Inc.
9  * Written by: Adrian Chadd <adrian@FreeBSD.org>
10  *
11  * Portions of this software were developed by A. Joseph Koshy under
12  * sponsorship from the FreeBSD Foundation and Google, Inc.
13  *
14  * Redistribution and use in source and binary forms, with or without
15  * modification, are permitted provided that the following conditions
16  * are met:
17  * 1. Redistributions of source code must retain the above copyright
18  *    notice, this list of conditions and the following disclaimer.
19  * 2. Redistributions in binary form must reproduce the above copyright
20  *    notice, this list of conditions and the following disclaimer in the
21  *    documentation and/or other materials provided with the distribution.
22  *
23  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33  * SUCH DAMAGE.
34  */
35 
36 /*
37  * Transform a hwpmc(4) log into human readable form, and into
38  * gprof(1) compatible profiles.
39  */
40 
41 #include <sys/param.h>
42 #include <sys/endian.h>
43 #include <sys/gmon.h>
44 #include <sys/imgact_aout.h>
45 #include <sys/imgact_elf.h>
46 #include <sys/mman.h>
47 #include <sys/pmc.h>
48 #include <sys/queue.h>
49 #include <sys/socket.h>
50 #include <sys/stat.h>
51 #include <sys/wait.h>
52 
53 #include <netinet/in.h>
54 
55 #include <assert.h>
56 #include <err.h>
57 #include <errno.h>
58 #include <fcntl.h>
59 #include <gelf.h>
60 #include <libgen.h>
61 #include <limits.h>
62 #include <netdb.h>
63 #include <pmc.h>
64 #include <pmclog.h>
65 #include <sysexits.h>
66 #include <stdint.h>
67 #include <stdio.h>
68 #include <stdlib.h>
69 #include <string.h>
70 #include <unistd.h>
71 
72 #include "pmcstat.h"
73 #include "pmcstat_log.h"
74 #include "pmcpl_annotate_cg.h"
75 
76 /*
77  * Record a callchain.
78  */
79 
80 void
81 pmcpl_annotate_cg_process(struct pmcstat_process *pp, struct pmcstat_pmcrecord *pmcr,
82     uint32_t nsamples, uintfptr_t *cc, int usermode, uint32_t cpu)
83 {
84 	struct pmcstat_pcmap *map;
85 	struct pmcstat_symbol *sym;
86 	uintfptr_t newpc;
87 	struct pmcstat_image *image;
88 	int i;
89 	char filename[PATH_MAX], funcname[PATH_MAX];
90 	unsigned sline;
91 
92 	(void) pmcr; (void) nsamples; (void) usermode; (void) cpu;
93 
94 	for (i = 0; i < (int) nsamples; i++) {
95 		map = NULL;
96 		sym = NULL;
97 		image = NULL;
98 		filename[0] = '\0';
99 		funcname[0] = '\0';
100 		sline = 0;
101 
102 		map = pmcstat_process_find_map(usermode ? pp : pmcstat_kernproc, cc[i]);
103 		if (map != NULL) {
104 			assert(cc[i] >= map->ppm_lowpc && cc[i] < map->ppm_highpc);
105 			image = map->ppm_image;
106 			newpc = cc[i] - (map->ppm_lowpc +
107 				(image->pi_vaddr - image->pi_start));
108 			sym = pmcstat_symbol_search(image, newpc);
109 		}
110 
111 		if (map != NULL && image != NULL && sym != NULL) {
112 			(void) pmcstat_image_addr2line(image, cc[i],
113 			    filename, sizeof(filename), &sline, funcname, sizeof(funcname));
114 		}
115 
116 		if (map != NULL && sym != NULL) {
117 			fprintf(args.pa_graphfile, "%p %s %s:%d\n",
118 			    (void *)cc[i],
119 			    funcname,
120 			    filename,
121 			    sline);
122 		} else {
123 			fprintf(args.pa_graphfile, "%p <unknown> ??:0\n",
124 			    (void *) cc[i]);
125 		}
126 	}
127 	fprintf(args.pa_graphfile, "--\n");
128 }
129