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 * 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 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 * 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