1 /*-
2 * Copyright (c) 2003-2008 Joseph Koshy
3 * Copyright (c) 2017 Ruslan Bukin <br@bsdpad.com>
4 * All rights reserved.
5 *
6 * This software was developed by BAE Systems, the University of Cambridge
7 * Computer Laboratory, and Memorial University under DARPA/AFRL contract
8 * FA8650-15-C-7558 ("CADETS"), as part of the DARPA Transparent Computing
9 * (TC) research program.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33 #include <sys/types.h>
34 #include <sys/cpuset.h>
35 #include <sys/event.h>
36 #include <sys/param.h>
37 #include <sys/socket.h>
38 #include <sys/stat.h>
39 #include <sys/module.h>
40 #include <sys/pmc.h>
41
42 #include <assert.h>
43 #include <err.h>
44 #include <pmc.h>
45 #include <pmclog.h>
46 #include <stdbool.h>
47 #include <stdio.h>
48 #include <stdlib.h>
49 #include <string.h>
50
51 #include "libpmcstat.h"
52
53 struct pmcstat_symbol *
pmcstat_symbol_search_by_name(struct pmcstat_process * pp,const char * pi_name,const char * name,uintptr_t * addr_start,uintptr_t * addr_end)54 pmcstat_symbol_search_by_name(struct pmcstat_process *pp,
55 const char *pi_name, const char *name, uintptr_t *addr_start,
56 uintptr_t *addr_end)
57 {
58 struct pmcstat_symbol *sym;
59 struct pmcstat_image *image;
60 struct pmcstat_pcmap *pcm;
61 const char *name1;
62 const char *name2;
63 bool found;
64 size_t i;
65
66 found = 0;
67
68 if (pp == NULL)
69 return (NULL);
70
71 TAILQ_FOREACH(pcm, &pp->pp_map, ppm_next) {
72 image = pcm->ppm_image;
73 if (image->pi_name == NULL)
74 continue;
75 name1 = pmcstat_string_unintern(image->pi_name);
76 if (strcmp(name1, pi_name) == 0) {
77 found = 1;
78 break;
79 }
80 }
81
82 if (!found || image->pi_symbols == NULL)
83 return (NULL);
84
85 found = 0;
86
87 for (i = 0; i < image->pi_symcount; i++) {
88 sym = &image->pi_symbols[i];
89 name2 = pmcstat_string_unintern(sym->ps_name);
90 if (strcmp(name2, name) == 0) {
91 found = 1;
92 break;
93 }
94 }
95
96 if (!found)
97 return (NULL);
98
99 *addr_start = (image->pi_vaddr - image->pi_start +
100 pcm->ppm_lowpc + sym->ps_start);
101 *addr_end = (image->pi_vaddr - image->pi_start +
102 pcm->ppm_lowpc + sym->ps_end);
103
104 return (sym);
105 }
106
107 /*
108 * Helper function.
109 */
110
111 int
pmcstat_symbol_compare(const void * a,const void * b)112 pmcstat_symbol_compare(const void *a, const void *b)
113 {
114 const struct pmcstat_symbol *sym1, *sym2;
115
116 sym1 = (const struct pmcstat_symbol *) a;
117 sym2 = (const struct pmcstat_symbol *) b;
118
119 if (sym1->ps_end <= sym2->ps_start)
120 return (-1);
121 if (sym1->ps_start >= sym2->ps_end)
122 return (1);
123 return (0);
124 }
125
126 /*
127 * Map an address to a symbol in an image.
128 */
129
130 struct pmcstat_symbol *
pmcstat_symbol_search(struct pmcstat_image * image,uintfptr_t addr)131 pmcstat_symbol_search(struct pmcstat_image *image, uintfptr_t addr)
132 {
133 struct pmcstat_symbol sym;
134
135 if (image->pi_symbols == NULL)
136 return (NULL);
137
138 sym.ps_name = NULL;
139 sym.ps_start = addr;
140 sym.ps_end = addr + 1;
141
142 return (bsearch((void *) &sym, image->pi_symbols,
143 image->pi_symcount, sizeof(struct pmcstat_symbol),
144 pmcstat_symbol_compare));
145 }
146