1 /* libunwind - a platform-independent unwind library 2 Copyright (C) 2010 Konstantin Belousov <kib (at) freebsd.org> 3 4 This file is part of libunwind. 5 6 Permission is hereby granted, free of charge, to any person obtaining 7 a copy of this software and associated documentation files (the 8 "Software"), to deal in the Software without restriction, including 9 without limitation the rights to use, copy, modify, merge, publish, 10 distribute, sublicense, and/or sell copies of the Software, and to 11 permit persons to whom the Software is furnished to do so, subject to 12 the following conditions: 13 14 The above copyright notice and this permission notice shall be 15 included in all copies or substantial portions of the Software. 16 17 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 18 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 19 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 20 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 21 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 22 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 23 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ 24 25 #include <sys/param.h> 26 #include <sys/types.h> 27 #include <sys/mman.h> 28 #include <sys/sysctl.h> 29 #include <sys/user.h> 30 #include <stdio.h> 31 #include <errno.h> 32 33 #include "libunwind_i.h" 34 35 static void * 36 get_mem(size_t sz) 37 { 38 void *res; 39 40 res = mmap(NULL, sz, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0); 41 if (res == MAP_FAILED) 42 return (NULL); 43 return (res); 44 } 45 46 static void 47 free_mem(void *ptr, size_t sz) 48 { 49 munmap(ptr, sz); 50 } 51 52 static int 53 get_pid_by_tid(int tid) 54 { 55 int mib[3], error; 56 size_t len, len1; 57 char *buf; 58 struct kinfo_proc *kv; 59 int i, pid; 60 61 len = 0; 62 mib[0] = CTL_KERN; 63 mib[1] = KERN_PROC; 64 mib[2] = KERN_PROC_ALL; 65 66 error = sysctl(mib, 3, NULL, &len, NULL, 0); 67 if (error == -1) 68 return (-1); 69 len1 = len * 4 / 3; 70 buf = get_mem(len1); 71 if (buf == NULL) 72 return (-1); 73 len = len1; 74 error = sysctl(mib, 3, buf, &len, NULL, 0); 75 if (error == -1) { 76 free_mem(buf, len1); 77 return (-1); 78 } 79 pid = -1; 80 for (i = 0, kv = (struct kinfo_proc *)buf; i < len / sizeof(*kv); 81 i++, kv++) { 82 if (kv->ki_tid == tid) { 83 pid = kv->ki_pid; 84 break; 85 } 86 } 87 free_mem(buf, len1); 88 return (pid); 89 } 90 91 /* ANDROID support update. */ 92 struct map_info * 93 map_create_list(pid_t pid) 94 { 95 int mib[4], error, ret; 96 size_t len, len1; 97 char *buf, *bp, *eb; 98 struct kinfo_vmentry *kv; 99 struct map_info *map_list = NULL; 100 101 len = 0; 102 mib[0] = CTL_KERN; 103 mib[1] = KERN_PROC; 104 mib[2] = KERN_PROC_VMMAP; 105 mib[3] = pid; 106 107 error = sysctl(mib, 4, NULL, &len, NULL, 0); 108 if (error == -1) { 109 if (errno == ESRCH) 110 { 111 mib[3] = get_pid_by_tid(pid); 112 if (mib[3] != -1) 113 error = sysctl(mib, 4, NULL, &len, NULL, 0); 114 if (error == -1) 115 return (-UNW_EUNSPEC); 116 } 117 else 118 return (-UNW_EUNSPEC); 119 } 120 len1 = len * 4 / 3; 121 buf = get_mem(len1); 122 if (buf == NULL) 123 return (-UNW_EUNSPEC); 124 len = len1; 125 error = sysctl(mib, 4, buf, &len, NULL, 0); 126 if (error == -1) 127 { 128 free_mem(buf, len1); 129 return (-UNW_EUNSPEC); 130 } 131 ret = -UNW_EUNSPEC; 132 for (bp = buf, eb = buf + len; bp < eb; bp += kv->kve_structsize) 133 { 134 kv = (struct kinfo_vmentry *)(uintptr_t)bp; 135 if (kv->kve_type != KVME_TYPE_VNODE) 136 continue; 137 138 cur_map = map_alloc_info (); 139 if (cur_map == NULL) 140 break; 141 cur_map->next = map_list; 142 cur_map->start = kv->kve_start; 143 cur_map->end = kv->kv_end; 144 cur_map->offset = kv->kve_offset; 145 cur_map->path = strdup(kv->kve_path); 146 mutex_init (&cur_map->ei_lock); 147 cur_map->ei.size = 0; 148 cur_map->ei.image = NULL; 149 cur_map->ei_shared = 0; 150 } 151 free_mem(buf, len1); 152 153 return map_list; 154 } 155 /* End of ANDROID update. */ 156
