lsmp.tproj/task_details.c

   1 /*
   2  * Copyright (c) 2002-2016 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22
  23 #include <unistd.h>
  24 #include <mach/mach.h>
  25 #include <mach/mach_error.h>
  26 #include <mach_debug/ipc_info.h>
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29 #include <libproc.h>
  30 #include <assert.h>
  31
  32 #include "common.h"
  33
  34 #pragma mark kobject to name hash table implementation
  35
  36 #if (K2N_TABLE_SIZE & (K2N_TABLE_SIZE - 1) != 0)
  37 #error K2N_TABLE_SIZE must be a power of two
  38 #endif
  39
  40 #define K2N_TABLE_MASK  (K2N_TABLE_SIZE - 1)
  41
  42 static uint32_t k2n_hash(natural_t kobject) {
  43     return (uint64_t)kobject * 2654435761 >> 32;
  44 }
  45
  46 static struct k2n_table_node *k2n_table_lookup_next_internal(struct k2n_table_node *node, natural_t kobject) {
  47     while (node) {
  48         if (kobject == node->kobject)
  49             return node;
  50
  51         node = node->next;
  52     }
  53
  54     return NULL;
  55 }
  56
  57 struct k2n_table_node *k2n_table_lookup_next(struct k2n_table_node *node, natural_t kobject) {
  58     if (!node) {
  59         return NULL;
  60     }
  61     return k2n_table_lookup_next_internal(node->next, kobject);
  62 }
  63
  64 struct k2n_table_node *k2n_table_lookup(struct k2n_table_node **table, natural_t kobject) {
  65     uint32_t hv;
  66     struct k2n_table_node *node;
  67
  68     hv = k2n_hash(kobject);
  69
  70     node = table[hv & K2N_TABLE_MASK];
  71
  72     return k2n_table_lookup_next_internal(node, kobject);
  73 }
  74
  75 static void k2n_table_enter(struct k2n_table_node **table, natural_t kobject, ipc_info_name_t *info_name) {
  76     uint32_t hv;
  77     struct k2n_table_node *node;
  78
  79     hv = k2n_hash(kobject);
  80
  81     node = malloc(sizeof (struct k2n_table_node));
  82     assert(node);
  83
  84     node->kobject = kobject;
  85     node->info_name = info_name;
  86     assert(kobject == info_name->iin_object);
  87
  88     node->next = table[hv & K2N_TABLE_MASK];
  89     table[hv & K2N_TABLE_MASK] = node;
  90 }
  91
  92 #pragma mark -
  93
  94 static my_per_task_info_t NOT_FOUND_TASK_INFO = {
  95     .task = NULL,
  96     .task_kobject = NULL,
  97     .pid = -1,
  98     .info = {0,0,0,0,0,0},
  99     .table = NULL,
 100     .tableCount = 0,
 101     .tree = NULL,
 102     .treeCount = 0,
 103     .valid = FALSE,
 104     .k2ntable = {0},
 105     .processName = "Unknown",
 106     .exceptionInfo = {0},
 107     .threadInfos = NULL,
 108     .threadCount = 0,
 109     .threadExceptionInfos = NULL
 110 };
 111
 112 char * get_task_name_by_pid(pid_t pid);
 113
 114 static void proc_pid_to_name(int pid, char *pname){
 115     if (0 == proc_name(pid, pname, PROC_NAME_LEN)) {
 116         strcpy(pname, "Unknown Process");
 117     }
 118 }
 119
 120 static my_per_task_info_t *global_taskinfo = NULL;
 121 static uint32_t global_taskcount = 0;
 122
 123 my_per_task_info_t * allocate_taskinfo_memory(uint32_t taskCount)
 124 {
 125     my_per_task_info_t * retval = malloc(taskCount * sizeof(my_per_task_info_t));
 126     if (retval) {
 127         bzero((void *)retval, taskCount * sizeof(my_per_task_info_t));
 128     }
 129     global_taskcount = taskCount;
 130     global_taskinfo = retval;
 131     return retval;
 132 }
 133
 134 void deallocate_taskinfo_memory(my_per_task_info_t *data){
 135     if (data) {
 136         free(data);
 137         global_taskinfo = NULL;
 138         global_taskcount = 0;
 139     }
 140 }
 141
 142 kern_return_t collect_per_task_info(my_per_task_info_t *taskinfo, task_t target_task)
 143 {
 144     int i;
 145     kern_return_t ret = KERN_SUCCESS;
 146     unsigned int kotype = 0;
 147     vm_offset_t kobject = (vm_offset_t)0;
 148
 149     taskinfo->task = target_task;
 150     pid_for_task(target_task, &taskinfo->pid);
 151
 152     ret = task_get_exception_ports(taskinfo->task, EXC_MASK_ALL, taskinfo->exceptionInfo.masks, &taskinfo->exceptionInfo.count, taskinfo->exceptionInfo.ports, taskinfo->exceptionInfo.behaviors, taskinfo->exceptionInfo.flavors);
 153
 154     if (ret != KERN_SUCCESS) {
 155         fprintf(stderr, "task_get_exception_ports() failed: pid:%d error: %s\n",taskinfo->pid, mach_error_string(ret));
 156         taskinfo->pid = 0;
 157     }
 158
 159     /* collect threads port as well */
 160     taskinfo->threadCount = 0;
 161     thread_act_array_t threadPorts;
 162     ret = task_threads(taskinfo->task, &threadPorts, &taskinfo->threadCount);
 163
 164     if (ret != KERN_SUCCESS) {
 165         fprintf(stderr, "task_threads() failed: pid:%d error: %s\n",taskinfo->pid, mach_error_string(ret));
 166         taskinfo->threadCount = 0;
 167     } else {
 168         /* collect the thread information */
 169         taskinfo->threadInfos = (struct my_per_thread_info *)malloc(sizeof(struct my_per_thread_info) * taskinfo->threadCount);
 170         bzero(taskinfo->threadInfos, sizeof(struct my_per_thread_info) * taskinfo->threadCount);
 171
 172         /* now collect exception ports for each of those threads as well */
 173         taskinfo->threadExceptionInfos = (struct exc_port_info *) malloc(sizeof(struct exc_port_info) * taskinfo->threadCount);
 174         boolean_t found_exception = false;
 175         for (int i = 0; i < taskinfo->threadCount; i++) {
 176             unsigned th_kobject = 0;
 177             unsigned th_kotype = 0;
 178             ipc_voucher_t th_voucher = IPC_VOUCHER_NULL;
 179             thread_identifier_info_data_t th_info;
 180             mach_msg_type_number_t th_info_count = THREAD_IDENTIFIER_INFO_COUNT;
 181             struct exc_port_info *excinfo = &(taskinfo->threadExceptionInfos[i]);
 182
 183             ret = thread_get_exception_ports(threadPorts[i], EXC_MASK_ALL, excinfo->masks, &excinfo->count, excinfo->ports, excinfo->behaviors, excinfo->flavors);
 184             if (ret != KERN_SUCCESS){
 185                 fprintf(stderr, "thread_get_exception_ports() failed: pid: %d thread: %d error %s\n", taskinfo->pid, threadPorts[i], mach_error_string(ret));
 186             }
 187
 188             if (excinfo->count != 0) {
 189                 found_exception = true;
 190             }
 191
 192             taskinfo->threadInfos[i].thread = threadPorts[i];
 193
 194             if (KERN_SUCCESS == mach_port_kernel_object(mach_task_self(), threadPorts[i], &th_kotype, &th_kobject)) {
 195                 taskinfo->threadInfos[i].th_kobject = th_kobject;
 196                 if (KERN_SUCCESS == thread_info(threadPorts[i], THREAD_IDENTIFIER_INFO, (thread_info_t)&th_info, &th_info_count)) {
 197                     taskinfo->threadInfos[i].th_id = th_info.thread_id;
 198                 }
 199             }
 200
 201             if (KERN_SUCCESS == thread_get_mach_voucher(threadPorts[i], 0, &th_voucher) && th_voucher != IPC_VOUCHER_NULL) {
 202                 char *detail = copy_voucher_detail(mach_task_self(), th_voucher, NULL);
 203                 taskinfo->threadInfos[i].voucher_detail = strndup(detail, VOUCHER_DETAIL_MAXLEN);
 204                 free(detail);
 205
 206                 mach_port_deallocate(mach_task_self(), th_voucher);
 207             }
 208
 209             mach_port_deallocate(mach_task_self(), threadPorts[i]);
 210             threadPorts[i] = MACH_PORT_NULL;
 211         }
 212
 213         if (found_exception == false) {
 214             free(taskinfo->threadExceptionInfos);
 215             taskinfo->threadExceptionInfos = NULL;
 216         }
 217
 218     }
 219
 220     vm_deallocate(mach_task_self(), threadPorts, taskinfo->threadCount * sizeof(thread_act_t));
 221     threadPorts = NULL;
 222
 223     ret = mach_port_space_info(target_task, &taskinfo->info, &taskinfo->table, &taskinfo->tableCount, &taskinfo->tree, &taskinfo->treeCount);
 224
 225     if (ret != KERN_SUCCESS) {
 226         fprintf(stderr, "mach_port_space_info() failed: pid:%d error: %s\n",taskinfo->pid, mach_error_string(ret));
 227         taskinfo->pid = 0;
 228         return ret;
 229     }
 230
 231     bzero(taskinfo->k2ntable, K2N_TABLE_SIZE * sizeof (struct k2n_table_node *));
 232     for (i = 0; i < taskinfo->tableCount; i++) {
 233         k2n_table_enter(taskinfo->k2ntable, taskinfo->table[i].iin_object, &taskinfo->table[i]);
 234     }
 235
 236     proc_pid_to_name(taskinfo->pid, taskinfo->processName);
 237
 238     ret = mach_port_kernel_object(mach_task_self(), taskinfo->task, &kotype, (unsigned *)&kobject);
 239
 240     if (ret == KERN_SUCCESS && kotype == IKOT_TASK_CONTROL) {
 241         taskinfo->task_kobject = kobject;
 242         taskinfo->valid = TRUE;
 243     }
 244
 245     return ret;
 246 }
 247
 248 void get_exc_behavior_string(exception_behavior_t b, char *out_string, size_t len)
 249 {
 250     out_string[0]='\0';
 251
 252     if (b & MACH_EXCEPTION_CODES)
 253         strlcat(out_string, "MACH +", len);
 254     switch (b & ~MACH_EXCEPTION_CODES) {
 255         case EXCEPTION_DEFAULT:
 256             strlcat(out_string, " DEFAULT", len);
 257             break;
 258         case EXCEPTION_STATE:
 259             strlcat(out_string, " STATE", len);
 260             break;
 261         case EXCEPTION_STATE_IDENTITY:
 262             strlcat(out_string, " IDENTITY", len);
 263             break;
 264         default:
 265             strlcat(out_string, " UNKNOWN", len);
 266     }
 267 }
 268
 269 void get_exc_mask_string(exception_mask_t m, char *out_string, size_t len)
 270 {
 271     out_string[0]='\0';
 272
 273     if (m & (1<<EXC_BAD_ACCESS))
 274         strlcat(out_string, " BAD_ACCESS", len);
 275     if (m & (1<<EXC_BAD_INSTRUCTION))
 276         strlcat(out_string," BAD_INSTRUCTION", len);
 277     if (m & (1<<EXC_ARITHMETIC))
 278         strlcat(out_string," ARITHMETIC", len);
 279     if (m & (1<<EXC_EMULATION))
 280         strlcat(out_string," EMULATION", len);
 281     if (m & (1<<EXC_SOFTWARE))
 282         strlcat(out_string," SOFTWARE", len);
 283     if (m & (1<<EXC_BREAKPOINT))
 284         strlcat(out_string," BREAKPOINT", len);
 285     if (m & (1<<EXC_SYSCALL))
 286         strlcat(out_string," SYSCALL", len);
 287     if (m & (1<<EXC_MACH_SYSCALL))
 288         strlcat(out_string," MACH_SYSCALL", len);
 289     if (m & (1<<EXC_RPC_ALERT))
 290         strlcat(out_string," RPC_ALERT", len);
 291     if (m & (1<<EXC_CRASH))
 292         strlcat(out_string," CRASH", len);
 293     if (m & (1<<EXC_RESOURCE))
 294         strlcat(out_string," RESOURCE", len);
 295     if (m & (1<<EXC_GUARD))
 296         strlcat(out_string," GUARD", len);
 297 }
 298
 299 kern_return_t print_task_exception_info(my_per_task_info_t *taskinfo, JSON_t json)
 300 {
 301
 302     char behavior_string[30];
 303     char mask_string[200];
 304
 305     JSON_KEY(json, exception_ports);
 306     JSON_ARRAY_BEGIN(json);
 307
 308     boolean_t header_required = TRUE;
 309     for (int i = 0; i < taskinfo->exceptionInfo.count; i++) {
 310         if (taskinfo->exceptionInfo.ports[i] != MACH_PORT_NULL) {
 311             if (header_required) {
 312
 313                 printf("    exc_port    flavor <behaviors>           mask   \n");
 314                 header_required = FALSE;
 315             }
 316             get_exc_behavior_string(taskinfo->exceptionInfo.behaviors[i], behavior_string, sizeof(behavior_string));
 317             get_exc_mask_string(taskinfo->exceptionInfo.masks[i], mask_string, sizeof(mask_string));
 318
 319             JSON_OBJECT_BEGIN(json);
 320             JSON_OBJECT_SET(json, port, "0x%08x", taskinfo->exceptionInfo.ports[i]);
 321             JSON_OBJECT_SET(json, flavor, "0x%03x", taskinfo->exceptionInfo.flavors[i]);
 322             JSON_OBJECT_SET(json, behavior, "%s", behavior_string);
 323             JSON_OBJECT_SET(json, mask, "%s", mask_string);
 324             JSON_OBJECT_END(json); // exception port
 325
 326             printf("    0x%08x  0x%03x  <%s>           %s  \n" , taskinfo->exceptionInfo.ports[i], taskinfo->exceptionInfo.flavors[i], behavior_string, mask_string);
 327         }
 328
 329     }
 330
 331     JSON_ARRAY_END(json); // exception ports
 332
 333     return KERN_SUCCESS;
 334 }
 335
 336
 337 kern_return_t print_task_threads_special_ports(my_per_task_info_t *taskinfo, JSON_t json)
 338 {
 339     kern_return_t kret = KERN_SUCCESS;
 340     mach_msg_type_number_t threadcount = taskinfo->threadCount;
 341     boolean_t header_required = TRUE;
 342     boolean_t newline_required = TRUE;
 343     struct my_per_thread_info * info = NULL;
 344
 345     JSON_KEY(json, threads);
 346     JSON_ARRAY_BEGIN(json);
 347
 348     for (int i = 0; i < threadcount; i++) {
 349         JSON_OBJECT_BEGIN(json);
 350
 351         info = &taskinfo->threadInfos[i];
 352         if (header_required) {
 353             printf("Thread_KObject  Thread-ID     Port Description.");
 354             header_required = FALSE;
 355         }
 356
 357         if (newline_required) {
 358             printf("\n");
 359         }
 360         newline_required = TRUE;
 361
 362         if (info->th_kobject != 0) {
 363             /* TODO: Should print tid and stuff */
 364             printf("0x%08x       ", info->th_kobject);
 365             printf("0x%llx  ", info->th_id);
 366
 367             JSON_OBJECT_SET(json, kobject, "0x%08x", info->th_kobject);
 368             JSON_OBJECT_SET(json, tid, "0x%llx", info->th_id);
 369         }
 370
 371         if (info->voucher_detail != NULL) {
 372             /* TODO: include voucher detail in JSON */
 373             printf("%s\n", info->voucher_detail);
 374         }
 375
 376         JSON_KEY(json, exception_ports);
 377         JSON_ARRAY_BEGIN(json);
 378
 379         /* print the thread exception ports also */
 380         if (taskinfo->threadExceptionInfos != NULL)
 381         {
 382
 383             struct exc_port_info *excinfo = &taskinfo->threadExceptionInfos[i];
 384             char behavior_string[30];
 385             char mask_string[200];
 386
 387             if (excinfo->count > 0) {
 388                 boolean_t header_required = TRUE;
 389                 for (int i = 0; i < excinfo->count; i++) {
 390                     JSON_OBJECT_BEGIN(json);
 391
 392                     if (excinfo->ports[i] != MACH_PORT_NULL) {
 393                         if (header_required) {
 394                             printf("\n    exc_port    flavor <behaviors>           mask   -> name    owner\n");
 395                             header_required = FALSE;
 396                         }
 397                         get_exc_behavior_string(excinfo->behaviors[i], behavior_string, sizeof(behavior_string));
 398                         get_exc_mask_string(excinfo->masks[i], mask_string, sizeof(mask_string));
 399
 400                         JSON_OBJECT_SET(json, port, "0x%08x", excinfo->ports[i]);
 401                         JSON_OBJECT_SET(json, flavor, "0x%03x", excinfo->flavors[i]);
 402                         JSON_OBJECT_SET(json, behavior, "%s", behavior_string);
 403                         JSON_OBJECT_SET(json, mask, "%s", mask_string);
 404
 405                         printf("    0x%08x  0x%03x  <%s>           %s  " , excinfo->ports[i], excinfo->flavors[i], behavior_string, mask_string);
 406
 407                         ipc_info_name_t actual_sendinfo;
 408                         if (KERN_SUCCESS == get_ipc_info_from_lsmp_spaceinfo(excinfo->ports[i], &actual_sendinfo)) {
 409                             my_per_task_info_t *recv_holder_taskinfo;
 410                             mach_port_name_t recv_name = MACH_PORT_NULL;
 411                             if (KERN_SUCCESS == get_taskinfo_of_receiver_by_send_right(&actual_sendinfo, &recv_holder_taskinfo, &recv_name)) {
 412
 413                                 JSON_OBJECT_SET(json, name, "0x%08x", recv_name);
 414                                 JSON_OBJECT_SET(json, ipc-object, "0x%08x", actual_sendinfo.iin_object);
 415                                 JSON_OBJECT_SET(json, pid, %d, recv_holder_taskinfo->pid);
 416                                 JSON_OBJECT_SET(json, process, "%s", recv_holder_taskinfo->processName);
 417
 418                                 printf("   -> 0x%08x  0x%08x  (%d) %s\n",
 419                                        recv_name,
 420                                        actual_sendinfo.iin_object,
 421                                        recv_holder_taskinfo->pid,
 422                                        recv_holder_taskinfo->processName);
 423                             }
 424
 425                         } else {
 426                             fprintf(stderr, "failed to find");
 427                         }
 428
 429                         printf("\n");
 430
 431                     }
 432                     JSON_OBJECT_END(json); // exception port
 433                 }
 434             }
 435         }
 436         JSON_ARRAY_END(json); // exception ports
 437         JSON_OBJECT_END(json); // thread
 438     }
 439
 440     JSON_ARRAY_END(json); // threads
 441     printf("\n");
 442     return kret;
 443 }
 444
 445 char * get_task_name_by_pid(pid_t pid) {
 446     char * retval = "Unknown";
 447     for (int i = 0; i < global_taskcount; i++) {
 448         if (pid == global_taskinfo[i].pid) {
 449             return global_taskinfo[i].processName;
 450         }
 451     }
 452     return retval;
 453 }
 454
 455 my_per_task_info_t * get_taskinfo_by_kobject(natural_t kobj) {
 456     my_per_task_info_t *retval = &NOT_FOUND_TASK_INFO;
 457     for (int j = 0; j < global_taskcount; j++) {
 458         if (global_taskinfo[j].task_kobject == kobj) {
 459             retval = &global_taskinfo[j];
 460             break;
 461         }
 462     }
 463     return retval;
 464 }
 465
 466 kern_return_t get_taskinfo_of_receiver_by_send_right(ipc_info_name_t *sendright, my_per_task_info_t **out_taskinfo, mach_port_name_t *out_recv_info)
 467 {
 468     *out_taskinfo = &NOT_FOUND_TASK_INFO;
 469     struct k2n_table_node *k2nnode;
 470
 471     for (int j = 0; j < global_taskcount; j++) {
 472         if ((k2nnode = k2n_table_lookup(global_taskinfo[j].k2ntable, sendright->iin_object))) {
 473             assert(k2nnode->info_name->iin_object == sendright->iin_object);
 474
 475             if (k2nnode->info_name->iin_type & MACH_PORT_TYPE_RECEIVE) {
 476                 *out_taskinfo = &global_taskinfo[j];
 477                 *out_recv_info = k2nnode->info_name->iin_name;
 478                 return KERN_SUCCESS;
 479             }
 480         }
 481     }
 482
 483     return KERN_FAILURE;
 484 }
 485
 486 kern_return_t get_ipc_info_from_lsmp_spaceinfo(mach_port_t port_name, ipc_info_name_t *out_sendright){
 487     kern_return_t retval = KERN_FAILURE;
 488     bzero(out_sendright, sizeof(ipc_info_name_t));
 489     my_per_task_info_t *mytaskinfo = NULL;
 490     for (int i = global_taskcount - 1; i >= 0; i--){
 491         if (global_taskinfo[i].task == mach_task_self()){
 492             mytaskinfo = &global_taskinfo[i];
 493             break;
 494         }
 495     }
 496     if (mytaskinfo) {
 497         for (int k = 0; k < mytaskinfo->tableCount; k++) {
 498             if (port_name == mytaskinfo->table[k].iin_name){
 499                 bcopy(&mytaskinfo->table[k], out_sendright, sizeof(ipc_info_name_t));
 500                 retval = KERN_SUCCESS;
 501                 break;
 502             }
 503         }
 504     }
 505     return retval;
 506
 507 }