1#include <darwintest.h> 2#include <darwintest_utils.h> 3#include <darwintest_multiprocess.h> 4#include <kern/debug.h> 5#include <kern/kern_cdata.h> 6#include <kern/block_hint.h> 7#include <kdd.h> 8#include <libproc.h> 9#include <os/atomic_private.h> 10#include <mach-o/dyld.h> 11#include <mach-o/dyld_images.h> 12#include <mach-o/dyld_priv.h> 13#include <sys/syscall.h> 14#include <sys/stackshot.h> 15#include <uuid/uuid.h> 16#include <servers/bootstrap.h> 17#include <pthread/workqueue_private.h> 18#include <dispatch/private.h> 19#include <stdalign.h> 20#include <TargetConditionals.h> 21 22#import <zlib.h> 23#import <IOKit/IOKitLib.h> 24#import <IOKit/IOKitLibPrivate.h> 25#import <IOKit/IOKitKeysPrivate.h> 26#import "test_utils.h" 27 28 29 30T_GLOBAL_META( 31 T_META_NAMESPACE("xnu.stackshot"), 32 T_META_RADAR_COMPONENT_NAME("xnu"), 33 T_META_RADAR_COMPONENT_VERSION("stackshot"), 34 T_META_OWNER("jonathan_w_adams"), 35 T_META_CHECK_LEAKS(false), 36 T_META_ASROOT(true), 37 XNU_T_META_SOC_SPECIFIC 38 ); 39 40static const char *current_process_name(void); 41static void verify_stackshot_sharedcache_layout(struct dyld_uuid_info_64 *uuids, uint32_t uuid_count); 42static void parse_stackshot(uint64_t stackshot_parsing_flags, void *ssbuf, size_t sslen, NSDictionary *extra); 43static void parse_thread_group_stackshot(void **sbuf, size_t sslen); 44static uint64_t stackshot_timestamp(void *ssbuf, size_t sslen); 45static void initialize_thread(void); 46 47static uint64_t global_flags = 0; 48 49#define DEFAULT_STACKSHOT_BUFFER_SIZE (1024 * 1024) 50#define MAX_STACKSHOT_BUFFER_SIZE (6 * 1024 * 1024) 51 52#define SRP_SERVICE_NAME "com.apple.xnu.test.stackshot.special_reply_port" 53 54/* bit flags for parse_stackshot */ 55#define PARSE_STACKSHOT_DELTA 0x01 56#define PARSE_STACKSHOT_ZOMBIE 0x02 57#define PARSE_STACKSHOT_SHAREDCACHE_LAYOUT 0x04 58#define PARSE_STACKSHOT_DISPATCH_QUEUE_LABEL 0x08 59#define PARSE_STACKSHOT_TURNSTILEINFO 0x10 60#define PARSE_STACKSHOT_POSTEXEC 0x20 61#define PARSE_STACKSHOT_WAITINFO_CSEG 0x40 62#define PARSE_STACKSHOT_WAITINFO_SRP 0x80 63#define PARSE_STACKSHOT_TRANSLATED 0x100 64#define PARSE_STACKSHOT_SHAREDCACHE_FLAGS 0x200 65#define PARSE_STACKSHOT_EXEC_INPROGRESS 0x400 66#define PARSE_STACKSHOT_TRANSITIONING 0x800 67#define PARSE_STACKSHOT_ASYNCSTACK 0x1000 68#define PARSE_STACKSHOT_COMPACTINFO 0x2000 /* TODO: rdar://88789261 */ 69#define PARSE_STACKSHOT_DRIVERKIT 0x4000 70#define PARSE_STACKSHOT_THROTTLED_SP 0x8000 71#define PARSE_STACKSHOT_SUSPENDINFO 0x10000 72#define PARSE_STACKSHOT_TARGETPID 0x20000 73 74/* keys for 'extra' dictionary for parse_stackshot */ 75static const NSString* zombie_child_pid_key = @"zombie_child_pid"; // -> @(pid), required for PARSE_STACKSHOT_ZOMBIE 76static const NSString* postexec_child_unique_pid_key = @"postexec_child_unique_pid"; // -> @(unique_pid), required for PARSE_STACKSHOT_POSTEXEC 77static const NSString* cseg_expected_threadid_key = @"cseg_expected_threadid"; // -> @(tid), required for PARSE_STACKSHOT_WAITINFO_CSEG 78static const NSString* srp_expected_threadid_key = @"srp_expected_threadid"; // -> @(tid), this or ..._pid required for PARSE_STACKSHOT_WAITINFO_SRP 79static const NSString* srp_expected_pid_key = @"srp_expected_pid"; // -> @(pid), this or ..._threadid required for PARSE_STACKSHOT_WAITINFO_SRP 80static const NSString* translated_child_pid_key = @"translated_child_pid"; // -> @(pid), required for PARSE_STACKSHOT_TRANSLATED 81static const NSString* sharedcache_child_pid_key = @"sharedcache_child_pid"; // @(pid), required for PARSE_STACKSHOT_SHAREDCACHE_FLAGS 82static const NSString* sharedcache_child_sameaddr_key = @"sharedcache_child_sameaddr"; // @(0 or 1), required for PARSE_STACKSHOT_SHAREDCACHE_FLAGS 83static const NSString* exec_inprogress_pid_key = @"exec_inprogress_pid"; 84static const NSString* exec_inprogress_found_key = @"exec_inprogress_found"; // callback when inprogress is found 85static const NSString* transitioning_pid_key = @"transitioning_task_pid"; // -> @(pid), required for PARSE_STACKSHOT_TRANSITIONING 86static const NSString* asyncstack_expected_threadid_key = @"asyncstack_expected_threadid"; // -> @(tid), required for PARSE_STACKSHOT_ASYNCSTACK 87static const NSString* asyncstack_expected_stack_key = @"asyncstack_expected_stack"; // -> @[pc...]), expected PCs for asyncstack 88static const NSString* driverkit_found_key = @"driverkit_found_key"; // callback when driverkit process is found. argument is the process pid. 89static const NSString* sp_throttled_expected_ctxt_key = @"sp_throttled_expected_ctxt_key"; // -> @(ctxt), required for PARSE_STACKSHOT_THROTTLED_SP 90static const NSString* sp_throttled_expect_flag = @"sp_throttled_expect_flag"; // -> @(is_throttled), required for PARSE_STACKSHOT_THROTTLED_SP 91static const NSString* no_exclaves_key = @"no_exclaves"; 92 93#define TEST_STACKSHOT_QUEUE_LABEL "houston.we.had.a.problem" 94#define TEST_STACKSHOT_QUEUE_LABEL_LENGTH sizeof(TEST_STACKSHOT_QUEUE_LABEL) 95 96#define THROTTLED_SERVICE_NAME "com.apple.xnu.test.stackshot.throttled_service" 97 98static int64_t 99run_sysctl_test(const char *t, int64_t value) 100{ 101 char name[1024]; 102 int64_t result = 0; 103 size_t s = sizeof(value); 104 int rc; 105 106 snprintf(name, sizeof(name), "debug.test.%s", t); 107 rc = sysctlbyname(name, &result, &s, &value, s); 108 T_QUIET; T_ASSERT_POSIX_SUCCESS(rc, "sysctlbyname(%s)", name); 109 return result; 110} 111 112T_DECL(microstackshots, "test the microstackshot syscall", T_META_TAG_VM_PREFERRED) 113{ 114 void *buf = NULL; 115 unsigned int size = DEFAULT_STACKSHOT_BUFFER_SIZE; 116 117 while (1) { 118 buf = malloc(size); 119 T_QUIET; T_ASSERT_NOTNULL(buf, "allocated stackshot buffer"); 120 121#pragma clang diagnostic push 122#pragma clang diagnostic ignored "-Wdeprecated-declarations" 123 int len = syscall(SYS_microstackshot, buf, size, 124 (uint32_t) STACKSHOT_GET_MICROSTACKSHOT); 125#pragma clang diagnostic pop 126 if (len == ENOSYS) { 127 T_SKIP("microstackshot syscall failed, likely not compiled with CONFIG_TELEMETRY"); 128 } 129 if (len == -1 && errno == ENOSPC) { 130 /* syscall failed because buffer wasn't large enough, try again */ 131 free(buf); 132 buf = NULL; 133 size *= 2; 134 T_ASSERT_LE(size, (unsigned int)MAX_STACKSHOT_BUFFER_SIZE, 135 "growing stackshot buffer to sane size"); 136 continue; 137 } 138 T_ASSERT_POSIX_SUCCESS(len, "called microstackshot syscall"); 139 break; 140 } 141 142 T_EXPECT_EQ(*(uint32_t *)buf, 143 (uint32_t)STACKSHOT_MICRO_SNAPSHOT_MAGIC, 144 "magic value for microstackshot matches"); 145 146 free(buf); 147} 148 149struct scenario { 150 const char *name; 151 uint64_t flags; 152 bool quiet; 153 bool should_fail; 154 bool maybe_unsupported; 155 bool maybe_enomem; 156 bool no_recordfile; 157 pid_t target_pid; 158 bool target_kernel; 159 bool nocheck_recordfile; 160 uint64_t since_timestamp; 161 uint32_t size_hint; 162 dt_stat_time_t timer; 163}; 164 165static void 166quiet(struct scenario *scenario) 167{ 168 if (scenario->timer || scenario->quiet) { 169 T_QUIET; 170 } 171} 172 173static void 174take_stackshot(struct scenario *scenario, bool compress_ok, void (^cb)(void *buf, size_t size)) 175{ 176start: 177 initialize_thread(); 178 179 void *config = stackshot_config_create(); 180 quiet(scenario); 181 T_ASSERT_NOTNULL(config, "created stackshot config"); 182 183 int ret = stackshot_config_set_flags(config, scenario->flags | global_flags); 184 quiet(scenario); 185 T_ASSERT_POSIX_ZERO(ret, "set flags %#llx on stackshot config", scenario->flags); 186 187 if (scenario->size_hint > 0) { 188 ret = stackshot_config_set_size_hint(config, scenario->size_hint); 189 quiet(scenario); 190 T_ASSERT_POSIX_ZERO(ret, "set size hint %" PRIu32 " on stackshot config", 191 scenario->size_hint); 192 } 193 194 if (scenario->target_pid > 0) { 195 ret = stackshot_config_set_pid(config, scenario->target_pid); 196 quiet(scenario); 197 T_ASSERT_POSIX_ZERO(ret, "set target pid %d on stackshot config", 198 scenario->target_pid); 199 } else if (scenario->target_kernel) { 200 ret = stackshot_config_set_pid(config, 0); 201 quiet(scenario); 202 T_ASSERT_POSIX_ZERO(ret, "set kernel target on stackshot config"); 203 } 204 205 if (scenario->since_timestamp > 0) { 206 ret = stackshot_config_set_delta_timestamp(config, scenario->since_timestamp); 207 quiet(scenario); 208 T_ASSERT_POSIX_ZERO(ret, "set since timestamp %" PRIu64 " on stackshot config", 209 scenario->since_timestamp); 210 } 211 212 int retries_remaining = 5; 213 214retry: ; 215 uint64_t start_time = mach_absolute_time(); 216 ret = stackshot_capture_with_config(config); 217 uint64_t end_time = mach_absolute_time(); 218 219 if (scenario->should_fail) { 220 T_EXPECTFAIL; 221 T_ASSERT_POSIX_ZERO(ret, "called stackshot_capture_with_config"); 222 return; 223 } 224 225 if (ret == EBUSY || ret == ETIMEDOUT) { 226 if (retries_remaining > 0) { 227 if (!scenario->timer) { 228 T_LOG("stackshot_capture_with_config failed with %s (%d), retrying", 229 strerror(ret), ret); 230 } 231 232 retries_remaining--; 233 goto retry; 234 } else { 235 T_ASSERT_POSIX_ZERO(ret, 236 "called stackshot_capture_with_config (no retries remaining)"); 237 } 238 } else if ((ret == ENOTSUP) && scenario->maybe_unsupported) { 239 T_SKIP("kernel indicated this stackshot configuration is not supported"); 240 } else if ((ret == ENOMEM) && scenario->maybe_enomem) { 241 T_SKIP("insufficient available memory to run test"); 242 } else { 243 quiet(scenario); 244 T_ASSERT_POSIX_ZERO(ret, "called stackshot_capture_with_config"); 245 } 246 247 if (scenario->timer) { 248 dt_stat_mach_time_add(scenario->timer, end_time - start_time); 249 } 250 void *buf = stackshot_config_get_stackshot_buffer(config); 251 size_t size = stackshot_config_get_stackshot_size(config); 252 if (scenario->name && !scenario->no_recordfile) { 253 char sspath[MAXPATHLEN]; 254 strlcpy(sspath, scenario->name, sizeof(sspath)); 255 strlcat(sspath, ".kcdata", sizeof(sspath)); 256 T_QUIET; T_ASSERT_POSIX_ZERO(dt_resultfile(sspath, sizeof(sspath)), 257 "create result file path"); 258 259 if (!scenario->quiet) { 260 T_LOG("writing stackshot to %s", sspath); 261 } 262 263 FILE *f = fopen(sspath, "w"); 264 T_WITH_ERRNO; T_QUIET; T_ASSERT_NOTNULL(f, 265 "open stackshot output file"); 266 267 size_t written = fwrite(buf, size, 1, f); 268 T_QUIET; T_ASSERT_POSIX_SUCCESS(written, "wrote stackshot to file"); 269 270 fclose(f); 271 272 // the xnu lldbmacros include a kcdata dumper which is used by 273 // panic triage and other things to process the recorded data 274 // from panics. With `-s foo.ips`, this generates a panic 275 // report similar. It's really important that this continues to 276 // work. 277 // 278 // We also ship the same code as /usr/local/bin/kcdata. To make 279 // sure the *.ips continues to work without aborting or otherwise 280 // tripping over the current data being output by xnu, we do a 281 // `kcdata.py -s /dev/null` run on the *first* kcdata we get for 282 // a given test, and save the stdout/err to files that get 283 // reported in the test report. Typically it will tell you the 284 // shared cache UUID and maybe complain about missing exclaves 285 // data. 286 // 287 // This only works on full stackshots, so we skip it for DELTAs, 288 // and BridgeOS is missing python, so we make sure everything we 289 // need is executable before trying 290#define PYTHON3_PATH "/usr/local/bin/python3" 291#define KCDATA_PATH "/usr/local/bin/kcdata" 292 if (!(scenario->flags & STACKSHOT_COLLECT_DELTA_SNAPSHOT) && 293 !scenario->nocheck_recordfile && 294 access(PYTHON3_PATH, X_OK) == 0 && access(KCDATA_PATH, X_OK) == 0) { 295 296 scenario->nocheck_recordfile = true; // don't do this more than once per scenario 297 char outpath[MAXPATHLEN]; 298 strlcpy(outpath, scenario->name, sizeof(outpath)); 299 strlcat(outpath, ".kcdpy-out", sizeof(outpath)); 300 char errpath[MAXPATHLEN]; 301 strlcpy(errpath, scenario->name, sizeof(errpath)); 302 strlcat(errpath, ".kcdpy-err", sizeof(errpath)); 303 T_QUIET; T_ASSERT_POSIX_ZERO(dt_resultfile(outpath, sizeof(outpath)), "create py-out path"); 304 T_QUIET; T_ASSERT_POSIX_ZERO(dt_resultfile(errpath, sizeof(errpath)), "create py-err path"); 305 306 char *launch_tool_args[] = { 307 KCDATA_PATH, 308 "-s", 309 "/dev/null", 310 sspath, 311 NULL 312 }; 313 pid_t child_pid = -1; 314 int ret = dt_launch_tool(&child_pid, launch_tool_args, false, outpath, errpath); 315 T_WITH_ERRNO; T_EXPECT_EQ(ret, 0, "dt_launch_tool(\"" KCDATA_PATH " -s /dev/null kcdata\") should succeed"); 316 if (ret == 0) { 317 int exit_status = 0, signum = 0; 318 ret = dt_waitpid(child_pid, &exit_status, &signum, 60); 319 T_QUIET; T_EXPECT_EQ(ret, 1, "dt_waitpid() on "KCDATA_PATH); 320 if (ret == 1) { 321 T_EXPECT_EQ(exit_status, 0, "kcdata.py should successfully run against our output"); 322 T_QUIET; T_EXPECT_EQ(signum, 0, "kcdata.py shouldn't get a signal"); 323 } 324 } 325 } 326 } 327 cb(buf, size); 328 if (compress_ok) { 329 if (global_flags == 0) { 330 T_LOG("Restarting test with compression"); 331 global_flags |= STACKSHOT_DO_COMPRESS; 332 goto start; 333 } else { 334 global_flags = 0; 335 } 336 } 337 338 ret = stackshot_config_dealloc(config); 339 T_QUIET; T_EXPECT_POSIX_ZERO(ret, "deallocated stackshot config"); 340} 341 342T_DECL(simple_compressed, "take a simple compressed stackshot", T_META_TAG_VM_PREFERRED) 343{ 344 struct scenario scenario = { 345 .name = "kcdata_compressed", 346 .flags = (STACKSHOT_DO_COMPRESS | STACKSHOT_SAVE_LOADINFO | STACKSHOT_THREAD_WAITINFO | STACKSHOT_GET_GLOBAL_MEM_STATS | 347 STACKSHOT_SAVE_IMP_DONATION_PIDS | STACKSHOT_KCDATA_FORMAT), 348 }; 349 350 T_LOG("taking compressed kcdata stackshot"); 351 take_stackshot(&scenario, true, ^(void *ssbuf, size_t sslen) { 352 parse_stackshot(0, ssbuf, sslen, nil); 353 }); 354} 355 356T_DECL(panic_compressed, "take a compressed stackshot with the same flags as a panic stackshot", T_META_TAG_VM_PREFERRED) 357{ 358 uint64_t stackshot_flags = (STACKSHOT_SAVE_KEXT_LOADINFO | 359 STACKSHOT_SAVE_LOADINFO | 360 STACKSHOT_KCDATA_FORMAT | 361 STACKSHOT_ENABLE_BT_FAULTING | 362 STACKSHOT_ENABLE_UUID_FAULTING | 363 STACKSHOT_DO_COMPRESS | 364 STACKSHOT_NO_IO_STATS | 365 STACKSHOT_THREAD_WAITINFO | 366#if TARGET_OS_MAC 367 STACKSHOT_COLLECT_SHAREDCACHE_LAYOUT | 368#endif 369 STACKSHOT_DISABLE_LATENCY_INFO); 370 371 struct scenario scenario = { 372 .name = "kcdata_panic_compressed", 373 .flags = stackshot_flags, 374 }; 375 376 T_LOG("taking compressed kcdata stackshot with panic flags"); 377 take_stackshot(&scenario, true, ^(void *ssbuf, size_t sslen) { 378 parse_stackshot(0, ssbuf, sslen, nil); 379 }); 380} 381 382T_DECL(kcdata, "test that kcdata stackshots can be taken and parsed", T_META_TAG_VM_PREFERRED) 383{ 384 struct scenario scenario = { 385 .name = "kcdata", 386 .flags = (STACKSHOT_SAVE_LOADINFO | STACKSHOT_GET_GLOBAL_MEM_STATS | 387 STACKSHOT_SAVE_IMP_DONATION_PIDS | STACKSHOT_KCDATA_FORMAT), 388 }; 389 390 T_LOG("taking kcdata stackshot"); 391 take_stackshot(&scenario, true, ^(void *ssbuf, size_t sslen) { 392 parse_stackshot(0, ssbuf, sslen, nil); 393 }); 394} 395 396static void 397get_stats(stackshot_stats_t *_Nonnull out) 398{ 399 size_t oldlen = sizeof (*out); 400 bzero(out, oldlen); 401 int result = sysctlbyname("kern.stackshot_stats", out, &oldlen, NULL, 0); 402 T_WITH_ERRNO; T_ASSERT_POSIX_SUCCESS(result, "reading \"kern.stackshot_stats\" sysctl should succeed"); 403 T_EXPECT_EQ(oldlen, sizeof (*out), "kernel should update full stats structure"); 404} 405 406static void 407log_stats(mach_timebase_info_data_t timebase, uint64_t now, const char *name, stackshot_stats_t stat) 408{ 409 uint64_t last_ago = (now - stat.ss_last_start) * timebase.numer / timebase.denom; 410 uint64_t last_duration = (stat.ss_last_end - stat.ss_last_start) * timebase.numer / timebase.denom; 411 uint64_t total_duration = (stat.ss_duration) * timebase.numer / timebase.denom; 412 413 uint64_t nanosec = 1000000000llu; 414 T_LOG("%s: %8lld stackshots, %10lld.%09lld total nsecs, last %lld.%09lld secs ago, %lld.%09lld secs long", 415 name, stat.ss_count, 416 total_duration / nanosec, total_duration % nanosec, 417 last_ago / nanosec, last_ago % nanosec, 418 last_duration / nanosec, last_duration % nanosec); 419} 420 421T_DECL(stats, "test that stackshot stats can be read out and change when a stackshot occurs", T_META_TAG_VM_PREFERRED) 422{ 423 mach_timebase_info_data_t timebase = {0, 0}; 424 mach_timebase_info(&timebase); 425 426 struct scenario scenario = { 427 .name = "kcdata", 428 .flags = (STACKSHOT_SAVE_LOADINFO | STACKSHOT_KCDATA_FORMAT), 429 }; 430 431 stackshot_stats_t pre, post; 432 433 get_stats(&pre); 434 435 T_LOG("taking kcdata stackshot"); 436 take_stackshot(&scenario, true, ^(__unused void *ssbuf, __unused size_t sslen) { 437 (void)0; 438 }); 439 440 get_stats(&post); 441 442 uint64_t now = mach_absolute_time(); 443 444 log_stats(timebase, now, " pre", pre); 445 log_stats(timebase, now, " post", post); 446 447 int64_t delta_stackshots = (int64_t)(post.ss_count - pre.ss_count); 448 int64_t delta_duration = (int64_t)(post.ss_duration - pre.ss_duration) * (int64_t)timebase.numer / (int64_t)timebase.denom; 449 int64_t delta_nsec = delta_duration % 1000000000ll; 450 if (delta_nsec < 0) { 451 delta_nsec += 1000000000ll; 452 } 453 T_LOG("delta: %+8lld stackshots, %+10lld.%09lld total nsecs", delta_stackshots, delta_duration / 1000000000ll, delta_nsec); 454 455 T_EXPECT_LT(pre.ss_last_start, pre.ss_last_end, "pre: stackshot should take time"); 456 T_EXPECT_LT(pre.ss_count, post.ss_count, "stackshot count should increase when a stackshot is taken"); 457 T_EXPECT_LT(pre.ss_duration, post.ss_duration, "stackshot duration should increase when a stackshot is taken"); 458 T_EXPECT_LT(pre.ss_last_end, post.ss_last_start, "previous end should be less than new start after a stackshot"); 459 T_EXPECT_LT(post.ss_last_start, post.ss_last_end, "post: stackshot should take time"); 460} 461 462T_DECL(kcdata_faulting, "test that kcdata stackshots while faulting can be taken and parsed", T_META_TAG_VM_PREFERRED) 463{ 464 struct scenario scenario = { 465 .name = "faulting", 466 .flags = (STACKSHOT_SAVE_LOADINFO | STACKSHOT_GET_GLOBAL_MEM_STATS 467 | STACKSHOT_SAVE_IMP_DONATION_PIDS | STACKSHOT_KCDATA_FORMAT 468 | STACKSHOT_ENABLE_BT_FAULTING | STACKSHOT_ENABLE_UUID_FAULTING), 469 }; 470 471 T_LOG("taking faulting stackshot"); 472 take_stackshot(&scenario, true, ^(void *ssbuf, size_t sslen) { 473 parse_stackshot(0, ssbuf, sslen, nil); 474 }); 475} 476 477T_DECL(bad_flags, "test a poorly-formed stackshot syscall", T_META_TAG_VM_PREFERRED) 478{ 479 struct scenario scenario = { 480 .flags = STACKSHOT_SAVE_IN_KERNEL_BUFFER /* not allowed from user space */, 481 .should_fail = true, 482 }; 483 484 T_LOG("attempting to take stackshot with kernel-only flag"); 485 take_stackshot(&scenario, true, ^(__unused void *ssbuf, __unused size_t sslen) { 486 T_ASSERT_FAIL("stackshot data callback called"); 487 }); 488} 489 490T_DECL(delta, "test delta stackshots", T_META_TAG_VM_PREFERRED) 491{ 492 struct scenario scenario = { 493 .name = "delta", 494 .flags = (STACKSHOT_SAVE_LOADINFO | STACKSHOT_GET_GLOBAL_MEM_STATS 495 | STACKSHOT_SAVE_IMP_DONATION_PIDS | STACKSHOT_KCDATA_FORMAT), 496 }; 497 498 T_LOG("taking full stackshot"); 499 take_stackshot(&scenario, false, ^(void *ssbuf, size_t sslen) { 500 uint64_t stackshot_time = stackshot_timestamp(ssbuf, sslen); 501 502 T_LOG("taking delta stackshot since time %" PRIu64, stackshot_time); 503 504 parse_stackshot(0, ssbuf, sslen, nil); 505 506 struct scenario delta_scenario = { 507 .flags = (STACKSHOT_SAVE_LOADINFO | STACKSHOT_GET_GLOBAL_MEM_STATS 508 | STACKSHOT_SAVE_IMP_DONATION_PIDS | STACKSHOT_KCDATA_FORMAT 509 | STACKSHOT_COLLECT_DELTA_SNAPSHOT), 510 .since_timestamp = stackshot_time 511 }; 512 513 take_stackshot(&delta_scenario, false, ^(void *dssbuf, size_t dsslen) { 514 parse_stackshot(PARSE_STACKSHOT_DELTA, dssbuf, dsslen, nil); 515 }); 516 }); 517} 518 519T_DECL(shared_cache_layout, "test stackshot inclusion of shared cache layout", T_META_TAG_VM_PREFERRED) 520{ 521 struct scenario scenario = { 522 .name = "shared_cache_layout", 523 .flags = (STACKSHOT_SAVE_LOADINFO | STACKSHOT_GET_GLOBAL_MEM_STATS 524 | STACKSHOT_SAVE_IMP_DONATION_PIDS | STACKSHOT_KCDATA_FORMAT | 525 STACKSHOT_COLLECT_SHAREDCACHE_LAYOUT), 526 }; 527 528 size_t shared_cache_length; 529 const void *cache_header = _dyld_get_shared_cache_range(&shared_cache_length); 530 if (cache_header == NULL) { 531 T_SKIP("Device not running with shared cache, skipping test..."); 532 } 533 534 if (shared_cache_length == 0) { 535 T_SKIP("dyld reports that currently running shared cache has zero length"); 536 } 537 538 T_LOG("taking stackshot with STACKSHOT_COLLECT_SHAREDCACHE_LAYOUT set"); 539 take_stackshot(&scenario, true, ^(void *ssbuf, size_t sslen) { 540 parse_stackshot(PARSE_STACKSHOT_SHAREDCACHE_LAYOUT, ssbuf, sslen, nil); 541 }); 542} 543 544T_DECL(stress, "test that taking stackshots for 60 seconds doesn't crash the system", T_META_TAG_VM_PREFERRED) 545{ 546 uint64_t max_diff_time = 60ULL /* seconds */ * 1000000000ULL; 547 uint64_t start_time; 548 549 struct scenario scenario = { 550 .name = "stress", 551 .quiet = true, 552 .flags = (STACKSHOT_KCDATA_FORMAT | 553 STACKSHOT_THREAD_WAITINFO | 554 STACKSHOT_SAVE_LOADINFO | 555 STACKSHOT_SAVE_KEXT_LOADINFO | 556 STACKSHOT_GET_GLOBAL_MEM_STATS | 557 STACKSHOT_SAVE_IMP_DONATION_PIDS | 558 STACKSHOT_COLLECT_SHAREDCACHE_LAYOUT | 559 STACKSHOT_THREAD_GROUP | 560 STACKSHOT_SAVE_JETSAM_COALITIONS | 561 STACKSHOT_ASID | 562 STACKSHOT_EXCLAVES | 563 0), 564 }; 565 566 start_time = clock_gettime_nsec_np(CLOCK_MONOTONIC); 567 while (clock_gettime_nsec_np(CLOCK_MONOTONIC) - start_time < max_diff_time) { 568 take_stackshot(&scenario, false, ^(void * __unused ssbuf, 569 size_t __unused sslen) { 570 printf("."); 571 fflush(stdout); 572 }); 573 574 /* 575 * After the first stackshot, there's no point in continuing to 576 * write them to disk, and it wears down the SSDs. 577 */ 578 scenario.no_recordfile = true; 579 580 /* Leave some time for the testing infrastructure to catch up */ 581 usleep(10000); 582 583 } 584 printf("\n"); 585} 586 587T_DECL(dispatch_queue_label, "test that kcdata stackshots contain libdispatch queue labels", T_META_TAG_VM_PREFERRED) 588{ 589 struct scenario scenario = { 590 .name = "kcdata", 591 .flags = (STACKSHOT_GET_DQ | STACKSHOT_KCDATA_FORMAT), 592 }; 593 dispatch_semaphore_t child_ready_sem, parent_done_sem; 594 dispatch_queue_t dq; 595 596#if TARGET_OS_WATCH 597 T_SKIP("This test is flaky on watches: 51663346"); 598#endif 599 600 child_ready_sem = dispatch_semaphore_create(0); 601 T_QUIET; T_ASSERT_NOTNULL(child_ready_sem, "dqlabel child semaphore"); 602 603 parent_done_sem = dispatch_semaphore_create(0); 604 T_QUIET; T_ASSERT_NOTNULL(parent_done_sem, "dqlabel parent semaphore"); 605 606 dq = dispatch_queue_create(TEST_STACKSHOT_QUEUE_LABEL, NULL); 607 T_QUIET; T_ASSERT_NOTNULL(dq, "dispatch queue"); 608 609 /* start the helper thread */ 610 dispatch_async(dq, ^{ 611 dispatch_semaphore_signal(child_ready_sem); 612 613 dispatch_semaphore_wait(parent_done_sem, DISPATCH_TIME_FOREVER); 614 }); 615 616 /* block behind the child starting up */ 617 dispatch_semaphore_wait(child_ready_sem, DISPATCH_TIME_FOREVER); 618 619 T_LOG("taking kcdata stackshot with libdispatch queue labels"); 620 take_stackshot(&scenario, true, ^(void *ssbuf, size_t sslen) { 621 parse_stackshot(PARSE_STACKSHOT_DISPATCH_QUEUE_LABEL, ssbuf, sslen, nil); 622 }); 623 624 dispatch_semaphore_signal(parent_done_sem); 625} 626 627#define CACHEADDR_ENV "STACKSHOT_TEST_DYLDADDR" 628T_HELPER_DECL(spawn_reslide_child, "child process to spawn with alternate slide") 629{ 630 size_t shared_cache_len; 631 const void *addr, *prevaddr; 632 uintmax_t v; 633 char *endptr; 634 635 const char *cacheaddr_env = getenv(CACHEADDR_ENV); 636 T_QUIET; T_ASSERT_NOTNULL(cacheaddr_env, "getenv("CACHEADDR_ENV")"); 637 errno = 0; 638 endptr = NULL; 639 v = strtoumax(cacheaddr_env, &endptr, 16); /* read hex value */ 640 T_WITH_ERRNO; T_QUIET; T_ASSERT_NE(v, 0l, "getenv(%s) = \"%s\" should be a non-zero hex number", CACHEADDR_ENV, cacheaddr_env); 641 T_QUIET; T_ASSERT_EQ(*endptr, 0, "getenv(%s) = \"%s\" endptr \"%s\" should be empty", CACHEADDR_ENV, cacheaddr_env, endptr); 642 643 prevaddr = (const void *)v; 644 addr = _dyld_get_shared_cache_range(&shared_cache_len); 645 T_QUIET; T_ASSERT_NOTNULL(addr, "shared cache address"); 646 647 T_QUIET; T_ASSERT_POSIX_SUCCESS(kill(getppid(), (addr == prevaddr) ? SIGUSR2 : SIGUSR1), "signaled parent to take stackshot"); 648 for (;;) { 649 (void) pause(); /* parent will kill -9 us */ 650 } 651} 652 653T_DECL(shared_cache_flags, "tests stackshot's task_ss_flags for the shared cache", T_META_TAG_VM_PREFERRED) 654{ 655 posix_spawnattr_t attr; 656 char *env_addr; 657 char path[PATH_MAX]; 658 __block bool child_same_addr = false; 659 660 uint32_t path_size = sizeof(path); 661 T_QUIET; T_ASSERT_POSIX_ZERO(_NSGetExecutablePath(path, &path_size), "_NSGetExecutablePath"); 662 char *args[] = { path, "-n", "spawn_reslide_child", NULL }; 663 pid_t pid; 664 size_t shared_cache_len; 665 const void *addr; 666 667 dispatch_source_t child_diffsig_src, child_samesig_src; 668 dispatch_semaphore_t child_ready_sem = dispatch_semaphore_create(0); 669 T_QUIET; T_ASSERT_NOTNULL(child_ready_sem, "shared_cache child semaphore"); 670 671 dispatch_queue_t signal_processing_q = dispatch_queue_create("signal processing queue", NULL); 672 T_QUIET; T_ASSERT_NOTNULL(signal_processing_q, "signal processing queue"); 673 674 signal(SIGUSR1, SIG_IGN); 675 signal(SIGUSR2, SIG_IGN); 676 child_samesig_src = dispatch_source_create(DISPATCH_SOURCE_TYPE_SIGNAL, SIGUSR1, 0, signal_processing_q); 677 T_QUIET; T_ASSERT_NOTNULL(child_samesig_src, "dispatch_source_create (child_samesig_src)"); 678 child_diffsig_src = dispatch_source_create(DISPATCH_SOURCE_TYPE_SIGNAL, SIGUSR2, 0, signal_processing_q); 679 T_QUIET; T_ASSERT_NOTNULL(child_diffsig_src, "dispatch_source_create (child_diffsig_src)"); 680 681 /* child will signal us depending on if their addr is the same or different */ 682 dispatch_source_set_event_handler(child_samesig_src, ^{ child_same_addr = false; dispatch_semaphore_signal(child_ready_sem); }); 683 dispatch_source_set_event_handler(child_diffsig_src, ^{ child_same_addr = true; dispatch_semaphore_signal(child_ready_sem); }); 684 dispatch_activate(child_samesig_src); 685 dispatch_activate(child_diffsig_src); 686 687 addr = _dyld_get_shared_cache_range(&shared_cache_len); 688 T_QUIET; T_ASSERT_NOTNULL(addr, "shared cache address"); 689 690 T_QUIET; T_ASSERT_POSIX_SUCCESS(asprintf(&env_addr, "%p", addr), "asprintf of env_addr succeeded"); 691 T_QUIET; T_ASSERT_POSIX_SUCCESS(setenv(CACHEADDR_ENV, env_addr, true), "setting "CACHEADDR_ENV" to %s", env_addr); 692 693 T_QUIET; T_ASSERT_POSIX_ZERO(posix_spawnattr_init(&attr), "posix_spawnattr_init"); 694 T_QUIET; T_ASSERT_POSIX_ZERO(posix_spawnattr_setflags(&attr, _POSIX_SPAWN_RESLIDE), "posix_spawnattr_setflags"); 695 int sp_ret = posix_spawn(&pid, path, NULL, &attr, args, environ); 696 T_ASSERT_POSIX_ZERO(sp_ret, "spawned process '%s' with PID %d", args[0], pid); 697 698 dispatch_semaphore_wait(child_ready_sem, DISPATCH_TIME_FOREVER); 699 T_LOG("received signal from child (%s), capturing stackshot", child_same_addr ? "same shared cache addr" : "different shared cache addr"); 700 701 struct scenario scenario = { 702 .name = "shared_cache_flags", 703 .flags = (STACKSHOT_SAVE_LOADINFO | STACKSHOT_GET_GLOBAL_MEM_STATS 704 | STACKSHOT_COLLECT_SHAREDCACHE_LAYOUT 705 | STACKSHOT_SAVE_IMP_DONATION_PIDS | STACKSHOT_KCDATA_FORMAT), 706 }; 707 708 take_stackshot(&scenario, false, ^( void *ssbuf, size_t sslen) { 709 int status; 710 /* First kill the child so we can reap it */ 711 T_QUIET; T_ASSERT_POSIX_SUCCESS(kill(pid, SIGKILL), "killing spawned process"); 712 T_QUIET; T_ASSERT_POSIX_SUCCESS(waitpid(pid, &status, 0), "waitpid on spawned child"); 713 T_QUIET; T_ASSERT_EQ(!!WIFSIGNALED(status), 1, "waitpid status should be signalled"); 714 T_QUIET; T_ASSERT_EQ(WTERMSIG(status), SIGKILL, "waitpid status should be SIGKILLed"); 715 716 parse_stackshot(PARSE_STACKSHOT_SHAREDCACHE_FLAGS, ssbuf, sslen, 717 @{sharedcache_child_pid_key: @(pid), sharedcache_child_sameaddr_key: @(child_same_addr ? 1 : 0)}); 718 }); 719} 720 721T_DECL(transitioning_tasks, "test that stackshot contains transitioning task info", T_META_BOOTARGS_SET("enable_proc_exit_lpexit_spin=1"), T_META_TAG_VM_PREFERRED) 722{ 723 int32_t sysctlValue = -1, numAttempts =0; 724 char path[PATH_MAX]; 725 uint32_t path_size = sizeof(path); 726 T_QUIET; T_ASSERT_POSIX_ZERO(_NSGetExecutablePath(path, &path_size), "_NSGetExecutablePath"); 727 char *args[] = { path, "-n", "exec_child_preexec", NULL }; 728 729 dispatch_source_t child_sig_src; 730 dispatch_semaphore_t child_ready_sem = dispatch_semaphore_create(0); 731 T_QUIET; T_ASSERT_NOTNULL(child_ready_sem, "exec child semaphore"); 732 733 dispatch_queue_t signal_processing_q = dispatch_queue_create("signal processing queue", NULL); 734 T_QUIET; T_ASSERT_NOTNULL(signal_processing_q, "signal processing queue"); 735 736 pid_t pid; 737 738 signal(SIGUSR1, SIG_IGN); 739 child_sig_src = dispatch_source_create(DISPATCH_SOURCE_TYPE_SIGNAL, SIGUSR1, 0, signal_processing_q); 740 T_QUIET; T_ASSERT_NOTNULL(child_sig_src, "dispatch_source_create (child_sig_src)"); 741 742 dispatch_source_set_event_handler(child_sig_src, ^{ dispatch_semaphore_signal(child_ready_sem); }); 743 dispatch_activate(child_sig_src); 744 745 T_ASSERT_POSIX_SUCCESS(sysctlbyname("debug.proc_exit_lpexit_spin_pid", NULL, NULL, &sysctlValue, sizeof(sysctlValue)), "set debug.proc_exit_lpexit_spin_pid=-1"); 746 747 int proc_exit_spin_pos = 0 ; 748 749 while (0 == sysctlbyname("debug.proc_exit_lpexit_spin_pos", NULL, NULL, &proc_exit_spin_pos, sizeof(proc_exit_spin_pos))) { 750 751 T_LOG(" ##### Testing while spinning in proc_exit at position %d ##### ", proc_exit_spin_pos); 752 753 int sp_ret = posix_spawn(&pid, args[0], NULL, NULL, args, NULL); 754 T_ASSERT_POSIX_ZERO(sp_ret, "spawned process '%s' with PID %d", args[0], pid); 755 756 dispatch_semaphore_wait(child_ready_sem, DISPATCH_TIME_FOREVER); 757 758 struct proc_uniqidentifierinfo proc_info_data = { }; 759 int retval = proc_pidinfo(getpid(), PROC_PIDUNIQIDENTIFIERINFO, 0, &proc_info_data, sizeof(proc_info_data)); 760 T_QUIET; T_EXPECT_POSIX_SUCCESS(retval, "proc_pidinfo PROC_PIDUNIQIDENTIFIERINFO"); 761 T_QUIET; T_ASSERT_EQ_INT(retval, (int) sizeof(proc_info_data), "proc_pidinfo PROC_PIDUNIQIDENTIFIERINFO returned data"); 762 763 T_ASSERT_POSIX_SUCCESS(kill(pid, SIGUSR1), "signaled pre-exec child to exec"); 764 765 /* wait for a signal from post-exec child */ 766 dispatch_semaphore_wait(child_ready_sem, DISPATCH_TIME_FOREVER); 767 768 T_ASSERT_POSIX_SUCCESS(sysctlbyname("debug.proc_exit_lpexit_spin_pid", NULL, NULL, &pid, sizeof(pid)), "set debug.proc_exit_lpexit_spin_pid = %d, ", pid); 769 770 T_ASSERT_POSIX_SUCCESS(kill(pid, SIGKILL), "kill post-exec child %d", pid); 771 772 sysctlValue = 0; 773 size_t len = sizeof(sysctlValue); 774 while (numAttempts < 5) { 775 T_ASSERT_POSIX_SUCCESS(sysctlbyname("debug.proc_exit_lpexit_spinning", &sysctlValue, &len, NULL, 0), "retrieve debug.proc_exit_lpexit_spinning"); 776 if (sysctlValue != 1) numAttempts++; 777 else break; 778 sleep(1); 779 } 780 781 T_ASSERT_EQ_UINT(sysctlValue, 1, "find spinning task in proc_exit()"); 782 783 struct scenario scenario = { 784 .name = "transitioning_tasks", 785 .flags = (STACKSHOT_KCDATA_FORMAT) 786 }; 787 788 take_stackshot(&scenario, false, ^( void *ssbuf, size_t sslen) { 789 parse_stackshot(PARSE_STACKSHOT_TRANSITIONING, ssbuf, sslen, @{transitioning_pid_key: @(pid)}); 790 791 // Kill the child 792 int sysctlValueB = -1; 793 T_ASSERT_POSIX_SUCCESS(sysctlbyname("debug.proc_exit_lpexit_spin_pid", NULL, NULL, &sysctlValueB, sizeof(sysctlValueB)), "set debug.proc_exit_lpexit_spin_pid=-1"); 794 sleep(1); 795 size_t blen = sizeof(sysctlValueB); 796 T_ASSERT_POSIX_SUCCESS(sysctlbyname("debug.proc_exit_lpexit_spinning", &sysctlValueB, &blen, NULL, 0), "retrieve debug.proc_exit_lpexit_spinning"); 797 T_ASSERT_EQ_UINT(sysctlValueB, 0, "make sure nothing is spining in proc_exit()"); 798 int status; 799 T_ASSERT_POSIX_SUCCESS(waitpid(pid, &status, 0), "waitpid on post-exec child"); 800 }); 801 802 proc_exit_spin_pos++; 803 } 804 805} 806 807static void *stuck_sysctl_thread(void *arg) { 808 int val = 1; 809 dispatch_semaphore_t child_thread_started = *(dispatch_semaphore_t *)arg; 810 811 dispatch_semaphore_signal(child_thread_started); 812 T_ASSERT_POSIX_SUCCESS(sysctlbyname("kern.wedge_thread", NULL, NULL, &val, sizeof(val)), "wedge child thread"); 813 814 return NULL; 815} 816 817T_HELPER_DECL(zombie_child, "child process to sample as a zombie") 818{ 819 pthread_t pthread; 820 dispatch_semaphore_t child_thread_started = dispatch_semaphore_create(0); 821 T_QUIET; T_ASSERT_NOTNULL(child_thread_started, "zombie child thread semaphore"); 822 823 /* spawn another thread to get stuck in the kernel, then call exit() to become a zombie */ 824 T_QUIET; T_ASSERT_POSIX_SUCCESS(pthread_create(&pthread, NULL, stuck_sysctl_thread, &child_thread_started), "pthread_create"); 825 826 dispatch_semaphore_wait(child_thread_started, DISPATCH_TIME_FOREVER); 827 828 /* sleep for a bit in the hope of ensuring that the other thread has called the sysctl before we signal the parent */ 829 usleep(100); 830 T_ASSERT_POSIX_SUCCESS(kill(getppid(), SIGUSR1), "signaled parent to take stackshot"); 831 832 exit(0); 833} 834 835T_DECL(zombie, "tests a stackshot of a zombie task with a thread stuck in the kernel", 836 T_META_ENABLED(false), /* test is too flaky to run by default, but transitioning_tasks covers this case as well */ 837 T_META_TAG_VM_PREFERRED) 838{ 839 char path[PATH_MAX]; 840 uint32_t path_size = sizeof(path); 841 T_ASSERT_POSIX_ZERO(_NSGetExecutablePath(path, &path_size), "_NSGetExecutablePath"); 842 char *args[] = { path, "-n", "zombie_child", NULL }; 843 844 dispatch_source_t child_sig_src; 845 dispatch_semaphore_t child_ready_sem = dispatch_semaphore_create(0); 846 T_QUIET; T_ASSERT_NOTNULL(child_ready_sem, "zombie child semaphore"); 847 848 dispatch_queue_t signal_processing_q = dispatch_queue_create("signal processing queue", NULL); 849 T_QUIET; T_ASSERT_NOTNULL(signal_processing_q, "signal processing queue"); 850 851 pid_t pid; 852 853 T_LOG("spawning a child"); 854 855 signal(SIGUSR1, SIG_IGN); 856 child_sig_src = dispatch_source_create(DISPATCH_SOURCE_TYPE_SIGNAL, SIGUSR1, 0, signal_processing_q); 857 T_QUIET; T_ASSERT_NOTNULL(child_sig_src, "dispatch_source_create (child_sig_src)"); 858 859 dispatch_source_set_event_handler(child_sig_src, ^{ dispatch_semaphore_signal(child_ready_sem); }); 860 dispatch_activate(child_sig_src); 861 862 int sp_ret = posix_spawn(&pid, args[0], NULL, NULL, args, NULL); 863 T_QUIET; T_ASSERT_POSIX_ZERO(sp_ret, "spawned process '%s' with PID %d", args[0], pid); 864 865 dispatch_semaphore_wait(child_ready_sem, DISPATCH_TIME_FOREVER); 866 867 T_LOG("received signal from child, capturing stackshot"); 868 869 struct proc_bsdshortinfo bsdshortinfo; 870 int retval, iterations_to_wait = 10; 871 872 while (iterations_to_wait > 0) { 873 retval = proc_pidinfo(pid, PROC_PIDT_SHORTBSDINFO, 0, &bsdshortinfo, sizeof(bsdshortinfo)); 874 if ((retval == 0) && errno == ESRCH) { 875 T_LOG("unable to find child using proc_pidinfo, assuming zombie"); 876 break; 877 } 878 879 T_QUIET; T_WITH_ERRNO; T_ASSERT_GT(retval, 0, "proc_pidinfo(PROC_PIDT_SHORTBSDINFO) returned a value > 0"); 880 T_QUIET; T_ASSERT_EQ(retval, (int)sizeof(bsdshortinfo), "proc_pidinfo call for PROC_PIDT_SHORTBSDINFO returned expected size"); 881 882 if (bsdshortinfo.pbsi_flags & PROC_FLAG_INEXIT) { 883 T_LOG("child proc info marked as in exit"); 884 break; 885 } 886 887 iterations_to_wait--; 888 if (iterations_to_wait == 0) { 889 /* 890 * This will mark the test as failed but let it continue so we 891 * don't leave a process stuck in the kernel. 892 */ 893 T_FAIL("unable to discover that child is marked as exiting"); 894 } 895 896 /* Give the child a few more seconds to make it to exit */ 897 sleep(5); 898 } 899 900 /* Give the child some more time to make it through exit */ 901 sleep(10); 902 903 struct scenario scenario = { 904 .name = "zombie", 905 .flags = (STACKSHOT_SAVE_LOADINFO | STACKSHOT_GET_GLOBAL_MEM_STATS 906 | STACKSHOT_SAVE_IMP_DONATION_PIDS | STACKSHOT_KCDATA_FORMAT), 907 }; 908 909 take_stackshot(&scenario, false, ^( void *ssbuf, size_t sslen) { 910 /* First unwedge the child so we can reap it */ 911 int val = 1, status; 912 T_ASSERT_POSIX_SUCCESS(sysctlbyname("kern.unwedge_thread", NULL, NULL, &val, sizeof(val)), "unwedge child"); 913 914 T_QUIET; T_ASSERT_POSIX_SUCCESS(waitpid(pid, &status, 0), "waitpid on zombie child"); 915 916 parse_stackshot(PARSE_STACKSHOT_ZOMBIE, ssbuf, sslen, @{zombie_child_pid_key: @(pid)}); 917 }); 918} 919 920T_HELPER_DECL(exec_child_preexec, "child process pre-exec") 921{ 922 dispatch_queue_t signal_processing_q = dispatch_queue_create("signal processing queue", NULL); 923 T_QUIET; T_ASSERT_NOTNULL(signal_processing_q, "signal processing queue"); 924 925 signal(SIGUSR1, SIG_IGN); 926 dispatch_source_t parent_sig_src = dispatch_source_create(DISPATCH_SOURCE_TYPE_SIGNAL, SIGUSR1, 0, signal_processing_q); 927 T_QUIET; T_ASSERT_NOTNULL(parent_sig_src, "dispatch_source_create (child_sig_src)"); 928 dispatch_source_set_event_handler(parent_sig_src, ^{ 929 930 // Parent took a timestamp then signaled us: exec into the next process 931 932 char path[PATH_MAX]; 933 uint32_t path_size = sizeof(path); 934 T_QUIET; T_ASSERT_POSIX_ZERO(_NSGetExecutablePath(path, &path_size), "_NSGetExecutablePath"); 935 char *args[] = { path, "-n", "exec_child_postexec", NULL }; 936 937 T_QUIET; T_ASSERT_POSIX_ZERO(execve(args[0], args, NULL), "execing into exec_child_postexec"); 938 }); 939 dispatch_activate(parent_sig_src); 940 941 T_ASSERT_POSIX_SUCCESS(kill(getppid(), SIGUSR1), "signaled parent to take timestamp"); 942 943 sleep(100); 944 // Should never get here 945 T_FAIL("Received signal to exec from parent"); 946} 947 948T_HELPER_DECL(exec_child_postexec, "child process post-exec to sample") 949{ 950 T_ASSERT_POSIX_SUCCESS(kill(getppid(), SIGUSR1), "signaled parent to take stackshot"); 951 sleep(100); 952 // Should never get here 953 T_FAIL("Killed by parent"); 954} 955 956T_DECL(exec, "test getting full task snapshots for a task that execs", T_META_TAG_VM_PREFERRED) 957{ 958 char path[PATH_MAX]; 959 uint32_t path_size = sizeof(path); 960 T_QUIET; T_ASSERT_POSIX_ZERO(_NSGetExecutablePath(path, &path_size), "_NSGetExecutablePath"); 961 char *args[] = { path, "-n", "exec_child_preexec", NULL }; 962 963 dispatch_source_t child_sig_src; 964 dispatch_semaphore_t child_ready_sem = dispatch_semaphore_create(0); 965 T_QUIET; T_ASSERT_NOTNULL(child_ready_sem, "exec child semaphore"); 966 967 dispatch_queue_t signal_processing_q = dispatch_queue_create("signal processing queue", NULL); 968 T_QUIET; T_ASSERT_NOTNULL(signal_processing_q, "signal processing queue"); 969 970 pid_t pid; 971 972 T_LOG("spawning a child"); 973 974 signal(SIGUSR1, SIG_IGN); 975 child_sig_src = dispatch_source_create(DISPATCH_SOURCE_TYPE_SIGNAL, SIGUSR1, 0, signal_processing_q); 976 T_QUIET; T_ASSERT_NOTNULL(child_sig_src, "dispatch_source_create (child_sig_src)"); 977 978 dispatch_source_set_event_handler(child_sig_src, ^{ dispatch_semaphore_signal(child_ready_sem); }); 979 dispatch_activate(child_sig_src); 980 981 int sp_ret = posix_spawn(&pid, args[0], NULL, NULL, args, NULL); 982 T_QUIET; T_ASSERT_POSIX_ZERO(sp_ret, "spawned process '%s' with PID %d", args[0], pid); 983 984 dispatch_semaphore_wait(child_ready_sem, DISPATCH_TIME_FOREVER); 985 uint64_t start_time = mach_absolute_time(); 986 987 struct proc_uniqidentifierinfo proc_info_data = { }; 988 int retval = proc_pidinfo(getpid(), PROC_PIDUNIQIDENTIFIERINFO, 0, &proc_info_data, sizeof(proc_info_data)); 989 T_QUIET; T_EXPECT_POSIX_SUCCESS(retval, "proc_pidinfo PROC_PIDUNIQIDENTIFIERINFO"); 990 T_QUIET; T_ASSERT_EQ_INT(retval, (int) sizeof(proc_info_data), "proc_pidinfo PROC_PIDUNIQIDENTIFIERINFO returned data"); 991 uint64_t unique_pid = proc_info_data.p_uniqueid; 992 993 T_LOG("received signal from pre-exec child, unique_pid is %llu, timestamp is %llu", unique_pid, start_time); 994 995 T_ASSERT_POSIX_SUCCESS(kill(pid, SIGUSR1), "signaled pre-exec child to exec"); 996 997 dispatch_semaphore_wait(child_ready_sem, DISPATCH_TIME_FOREVER); 998 999 T_LOG("received signal from post-exec child, capturing stackshot"); 1000 1001 struct scenario scenario = { 1002 .name = "exec", 1003 .flags = (STACKSHOT_SAVE_LOADINFO | STACKSHOT_GET_GLOBAL_MEM_STATS 1004 | STACKSHOT_SAVE_IMP_DONATION_PIDS | STACKSHOT_KCDATA_FORMAT 1005 | STACKSHOT_COLLECT_DELTA_SNAPSHOT), 1006 .since_timestamp = start_time 1007 }; 1008 1009 take_stackshot(&scenario, false, ^( void *ssbuf, size_t sslen) { 1010 // Kill the child 1011 int status; 1012 T_ASSERT_POSIX_SUCCESS(kill(pid, SIGKILL), "kill post-exec child %d", pid); 1013 T_ASSERT_POSIX_SUCCESS(waitpid(pid, &status, 0), "waitpid on post-exec child"); 1014 1015 parse_stackshot(PARSE_STACKSHOT_POSTEXEC | PARSE_STACKSHOT_DELTA, ssbuf, sslen, @{postexec_child_unique_pid_key: @(unique_pid)}); 1016 }); 1017} 1018 1019T_DECL( 1020 exec_inprogress, 1021 "test stackshots of processes in the middle of exec", 1022 T_META_ENABLED(false), /* rdar://111691318 */ 1023 T_META_TAG_VM_PREFERRED) 1024{ 1025 pid_t pid; 1026 /* a BASH quine which execs itself as long as the parent doesn't exit */ 1027 char *bash_prog = "[[ $PPID -ne 1 ]] && exec /bin/bash -c \"$0\" \"$0\""; 1028 char *args[] = { "/bin/bash", "-c", bash_prog, bash_prog, NULL }; 1029 1030 posix_spawnattr_t sattr; 1031 T_ASSERT_POSIX_ZERO(posix_spawnattr_init(&sattr), "posix_spawnattr_init"); 1032 T_ASSERT_POSIX_ZERO(posix_spawn(&pid, args[0], NULL, &sattr, args, NULL), "spawn exec_inprogress_child"); 1033 1034 struct scenario scenario = { 1035 .name = "exec_inprogress", 1036 .flags = (STACKSHOT_KCDATA_FORMAT), 1037 .target_pid = pid, 1038 }; 1039 1040 int tries = 0; 1041 int tries_limit = 30; 1042 __block bool found = false; 1043 __block uint64_t cid1 = 0, cid2 = 0; 1044 1045 for (tries = 0; !found && tries < tries_limit; tries++) { 1046 take_stackshot(&scenario, false, 1047 ^( void *ssbuf, size_t sslen) { 1048 parse_stackshot(PARSE_STACKSHOT_EXEC_INPROGRESS | PARSE_STACKSHOT_TARGETPID, 1049 ssbuf, sslen, @{ 1050 exec_inprogress_pid_key: @(pid), 1051 exec_inprogress_found_key: ^(uint64_t id1, uint64_t id2) { found = true; cid1 = id1; cid2 = id2; }}); 1052 }); 1053 } 1054 T_QUIET; T_ASSERT_POSIX_SUCCESS(kill(pid, SIGKILL), "killing exec loop"); 1055 T_ASSERT_TRUE(found, "able to find our execing process mid-exec in %d tries", tries); 1056 T_ASSERT_NE(cid1, cid2, "container IDs for in-progress exec are unique"); 1057 T_PASS("found mid-exec process in %d tries", tries); 1058} 1059 1060#ifdef _LP64 1061#if __has_feature(ptrauth_calls) 1062#define __ptrauth_swift_async_context_parent \ 1063 __ptrauth(ptrauth_key_process_independent_data, 1, 0xbda2) 1064#define __ptrauth_swift_async_context_resume \ 1065 __ptrauth(ptrauth_key_function_pointer, 1, 0xd707) 1066#else 1067#define __ptrauth_swift_async_context_parent 1068#define __ptrauth_swift_async_context_resume 1069#endif 1070// Add 1 to match the symbolication aid added by the stackshot backtracer. 1071#define asyncstack_frame(x) ((uintptr_t)(void *)ptrauth_strip((void *)(x), ptrauth_key_function_pointer) + 1) 1072 1073// This struct fakes the Swift AsyncContext struct which is used by 1074// the Swift concurrency runtime. We only care about the first 2 fields. 1075struct fake_async_context { 1076 struct fake_async_context* __ptrauth_swift_async_context_parent next; 1077 void(*__ptrauth_swift_async_context_resume resume_pc)(void); 1078}; 1079 1080static void 1081level1_func() 1082{ 1083} 1084static void 1085level2_func() 1086{ 1087} 1088 1089// Create a chain of fake async contexts; sync with asyncstack_expected_stack below 1090static alignas(16) struct fake_async_context level1 = { 0, level1_func }; 1091static alignas(16) struct fake_async_context level2 = { &level1, level2_func }; 1092 1093struct async_test_semaphores { 1094 dispatch_semaphore_t child_ready_sem; /* signal parent we're ready */ 1095 dispatch_semaphore_t child_exit_sem; /* parent tells us to go away */ 1096}; 1097 1098#define ASYNCSTACK_THREAD_NAME "asyncstack_thread" 1099 1100static void __attribute__((noinline, not_tail_called)) 1101expect_asyncstack(void *arg) 1102{ 1103 struct async_test_semaphores *async_ts = arg; 1104 1105 T_QUIET; T_ASSERT_POSIX_ZERO(pthread_setname_np(ASYNCSTACK_THREAD_NAME), 1106 "set thread name to %s", ASYNCSTACK_THREAD_NAME); 1107 1108 /* Tell the main thread we're all set up, then wait for permission to exit */ 1109 dispatch_semaphore_signal(async_ts->child_ready_sem); 1110 dispatch_semaphore_wait(async_ts->child_exit_sem, DISPATCH_TIME_FOREVER); 1111 usleep(1); /* make sure we don't tailcall semaphore_wait */ 1112} 1113 1114static void * 1115asyncstack_thread(void *arg) 1116{ 1117 uint64_t *fp = __builtin_frame_address(0); 1118 // We cannot use a variable of pointer type, because this ABI is valid 1119 // on arm64_32 where pointers are 32bits, but the context pointer will 1120 // still be stored in a 64bits slot on the stack. 1121#if __has_feature(ptrauth_calls) 1122#define __stack_context_auth __ptrauth(ptrauth_key_process_dependent_data, 1, \ 1123 0xc31a) 1124 struct fake_async_context * __stack_context_auth ctx = &level2; 1125#else // __has_feature(ptrauth_calls) 1126 /* struct fake_async_context * */uint64_t ctx = (uintptr_t)&level2; 1127#endif // !__has_feature(ptrauth_calls) 1128 1129 // The signature of an async frame on the OS stack is: 1130 // [ <AsyncContext address>, <Saved FP | (1<<60)>, <return address> ] 1131 // The Async context must be right before the saved FP on the stack. This 1132 // should happen naturally in an optimized build as it is the only 1133 // variable on the stack. 1134 // This function cannot use T_ASSERT_* becuse it changes the stack 1135 // layout. 1136 assert((uintptr_t)fp - (uintptr_t)&ctx == 8); 1137 1138 // Modify the saved FP on the stack to include the async frame marker 1139 *fp |= (0x1ULL << 60); 1140 expect_asyncstack(arg); 1141 return NULL; 1142} 1143 1144T_DECL(asyncstack, "test swift async stack entries", T_META_TAG_VM_PREFERRED) 1145{ 1146 struct scenario scenario = { 1147 .name = "asyncstack", 1148 .flags = STACKSHOT_KCDATA_FORMAT | STACKSHOT_SAVE_LOADINFO, 1149 }; 1150 struct async_test_semaphores async_ts = { 1151 .child_ready_sem = dispatch_semaphore_create(0), 1152 .child_exit_sem = dispatch_semaphore_create(0), 1153 }; 1154 T_QUIET; T_ASSERT_NOTNULL(async_ts.child_ready_sem, "child_ready_sem alloc"); 1155 T_QUIET; T_ASSERT_NOTNULL(async_ts.child_exit_sem, "child_exit_sem alloc"); 1156 1157 pthread_t pthread; 1158 __block uint64_t threadid = 0; 1159 T_QUIET; T_ASSERT_POSIX_ZERO(pthread_create(&pthread, NULL, asyncstack_thread, &async_ts), "pthread_create"); 1160 T_QUIET; T_ASSERT_POSIX_ZERO(pthread_threadid_np(pthread, &threadid), "pthread_threadid_np"); 1161 1162 dispatch_semaphore_wait(async_ts.child_ready_sem, DISPATCH_TIME_FOREVER); 1163 1164 take_stackshot(&scenario, true, ^( void *ssbuf, size_t sslen) { 1165 parse_stackshot(PARSE_STACKSHOT_ASYNCSTACK, ssbuf, sslen, @{ 1166 asyncstack_expected_threadid_key: @(threadid), 1167 asyncstack_expected_stack_key: @[ @(asyncstack_frame(level2_func)), @(asyncstack_frame(level1_func)) ], 1168 }); 1169 }); 1170 1171 dispatch_semaphore_signal(async_ts.child_exit_sem); 1172 T_QUIET; T_ASSERT_POSIX_ZERO(pthread_join(pthread, NULL), "wait for thread"); 1173 1174} 1175#endif /* #ifdef _LP64 */ 1176 1177static uint32_t 1178get_user_promotion_basepri(void) 1179{ 1180 mach_msg_type_number_t count = THREAD_POLICY_STATE_COUNT; 1181 struct thread_policy_state thread_policy; 1182 boolean_t get_default = FALSE; 1183 mach_port_t thread_port = pthread_mach_thread_np(pthread_self()); 1184 1185 kern_return_t kr = thread_policy_get(thread_port, THREAD_POLICY_STATE, 1186 (thread_policy_t)&thread_policy, &count, &get_default); 1187 T_QUIET; T_ASSERT_MACH_SUCCESS(kr, "thread_policy_get"); 1188 return thread_policy.thps_user_promotion_basepri; 1189} 1190 1191static int 1192get_pri(thread_t thread_port) 1193{ 1194 kern_return_t kr; 1195 1196 thread_extended_info_data_t extended_info; 1197 mach_msg_type_number_t count = THREAD_EXTENDED_INFO_COUNT; 1198 kr = thread_info(thread_port, THREAD_EXTENDED_INFO, 1199 (thread_info_t)&extended_info, &count); 1200 1201 T_QUIET; T_ASSERT_MACH_SUCCESS(kr, "thread_info"); 1202 1203 return extended_info.pth_curpri; 1204} 1205 1206 1207T_DECL(turnstile_singlehop, "turnstile single hop test", T_META_TAG_VM_PREFERRED) 1208{ 1209 dispatch_queue_t dq1, dq2; 1210 dispatch_semaphore_t sema_x; 1211 dispatch_queue_attr_t dq1_attr, dq2_attr; 1212 __block qos_class_t main_qos = 0; 1213 __block int main_relpri = 0, main_relpri2 = 0, main_afterpri = 0; 1214 struct scenario scenario = { 1215 .name = "turnstile_singlehop", 1216 .flags = (STACKSHOT_THREAD_WAITINFO | STACKSHOT_KCDATA_FORMAT), 1217 }; 1218 dq1_attr = dispatch_queue_attr_make_with_qos_class(DISPATCH_QUEUE_SERIAL, QOS_CLASS_UTILITY, 0); 1219 dq2_attr = dispatch_queue_attr_make_with_qos_class(DISPATCH_QUEUE_SERIAL, QOS_CLASS_USER_INITIATED, 0); 1220 pthread_mutex_t lock_a = PTHREAD_MUTEX_INITIALIZER; 1221 pthread_mutex_t lock_b = PTHREAD_MUTEX_INITIALIZER; 1222 1223 pthread_mutex_t *lockap = &lock_a, *lockbp = &lock_b; 1224 1225 dq1 = dispatch_queue_create("q1", dq1_attr); 1226 dq2 = dispatch_queue_create("q2", dq2_attr); 1227 sema_x = dispatch_semaphore_create(0); 1228 1229 pthread_mutex_lock(lockap); 1230 dispatch_async(dq1, ^{ 1231 pthread_mutex_lock(lockbp); 1232 T_ASSERT_POSIX_SUCCESS(pthread_get_qos_class_np(pthread_self(), &main_qos, &main_relpri), "get qos class"); 1233 T_LOG("The priority of q1 is %d\n", get_pri(mach_thread_self())); 1234 dispatch_semaphore_signal(sema_x); 1235 pthread_mutex_lock(lockap); 1236 }); 1237 dispatch_semaphore_wait(sema_x, DISPATCH_TIME_FOREVER); 1238 1239 T_LOG("Async1 completed"); 1240 1241 pthread_set_qos_class_self_np(QOS_CLASS_UTILITY, 0); 1242 T_ASSERT_POSIX_SUCCESS(pthread_get_qos_class_np(pthread_self(), &main_qos, &main_relpri), "get qos class"); 1243 T_LOG("The priority of main is %d\n", get_pri(mach_thread_self())); 1244 main_relpri = get_pri(mach_thread_self()); 1245 1246 dispatch_async(dq2, ^{ 1247 T_ASSERT_POSIX_SUCCESS(pthread_get_qos_class_np(pthread_self(), &main_qos, &main_relpri2), "get qos class"); 1248 T_LOG("The priority of q2 is %d\n", get_pri(mach_thread_self())); 1249 dispatch_semaphore_signal(sema_x); 1250 pthread_mutex_lock(lockbp); 1251 }); 1252 dispatch_semaphore_wait(sema_x, DISPATCH_TIME_FOREVER); 1253 1254 T_LOG("Async2 completed"); 1255 1256 while (1) { 1257 main_afterpri = (int) get_user_promotion_basepri(); 1258 if (main_relpri != main_afterpri) { 1259 T_LOG("Success with promotion pri is %d", main_afterpri); 1260 break; 1261 } 1262 1263 usleep(100); 1264 } 1265 1266 take_stackshot(&scenario, true, ^( void *ssbuf, size_t sslen) { 1267 parse_stackshot(PARSE_STACKSHOT_TURNSTILEINFO, ssbuf, sslen, nil); 1268 }); 1269} 1270 1271 1272static void 1273expect_instrs_cycles_in_stackshot(void *ssbuf, size_t sslen) 1274{ 1275 kcdata_iter_t iter = kcdata_iter(ssbuf, sslen); 1276 1277 bool in_task = false; 1278 bool in_thread = false; 1279 bool saw_instrs_cycles = false; 1280 iter = kcdata_iter_next(iter); 1281 1282 KCDATA_ITER_FOREACH(iter) { 1283 switch (kcdata_iter_type(iter)) { 1284 case KCDATA_TYPE_CONTAINER_BEGIN: 1285 switch (kcdata_iter_container_type(iter)) { 1286 case STACKSHOT_KCCONTAINER_TASK: 1287 in_task = true; 1288 saw_instrs_cycles = false; 1289 break; 1290 1291 case STACKSHOT_KCCONTAINER_THREAD: 1292 in_thread = true; 1293 saw_instrs_cycles = false; 1294 break; 1295 1296 default: 1297 break; 1298 } 1299 break; 1300 1301 case STACKSHOT_KCTYPE_INSTRS_CYCLES: 1302 saw_instrs_cycles = true; 1303 break; 1304 1305 case KCDATA_TYPE_CONTAINER_END: 1306 if (in_thread) { 1307 T_QUIET; T_EXPECT_TRUE(saw_instrs_cycles, 1308 "saw instructions and cycles in thread"); 1309 in_thread = false; 1310 } else if (in_task) { 1311 T_QUIET; T_EXPECT_TRUE(saw_instrs_cycles, 1312 "saw instructions and cycles in task"); 1313 in_task = false; 1314 } 1315 1316 default: 1317 break; 1318 } 1319 } 1320} 1321 1322static void 1323skip_if_monotonic_unsupported(void) 1324{ 1325 int supported = 0; 1326 size_t supported_size = sizeof(supported); 1327 int ret = sysctlbyname("kern.monotonic.supported", &supported, 1328 &supported_size, 0, 0); 1329 if (ret < 0 || !supported) { 1330 T_SKIP("monotonic is unsupported"); 1331 } 1332} 1333 1334T_DECL(instrs_cycles, "test a getting instructions and cycles in stackshot", T_META_TAG_VM_PREFERRED) 1335{ 1336 skip_if_monotonic_unsupported(); 1337 1338 struct scenario scenario = { 1339 .name = "instrs-cycles", 1340 .flags = (STACKSHOT_SAVE_LOADINFO | STACKSHOT_INSTRS_CYCLES 1341 | STACKSHOT_KCDATA_FORMAT), 1342 }; 1343 1344 T_LOG("attempting to take stackshot with instructions and cycles"); 1345 take_stackshot(&scenario, false, ^(void *ssbuf, size_t sslen) { 1346 parse_stackshot(0, ssbuf, sslen, nil); 1347 expect_instrs_cycles_in_stackshot(ssbuf, sslen); 1348 }); 1349} 1350 1351T_DECL(delta_instrs_cycles, 1352 "test delta stackshots with instructions and cycles", T_META_TAG_VM_PREFERRED) 1353{ 1354 skip_if_monotonic_unsupported(); 1355 1356 struct scenario scenario = { 1357 .name = "delta-instrs-cycles", 1358 .flags = (STACKSHOT_SAVE_LOADINFO | STACKSHOT_INSTRS_CYCLES 1359 | STACKSHOT_KCDATA_FORMAT), 1360 }; 1361 1362 T_LOG("taking full stackshot"); 1363 take_stackshot(&scenario, false, ^(void *ssbuf, size_t sslen) { 1364 uint64_t stackshot_time = stackshot_timestamp(ssbuf, sslen); 1365 1366 T_LOG("taking delta stackshot since time %" PRIu64, stackshot_time); 1367 1368 parse_stackshot(0, ssbuf, sslen, nil); 1369 expect_instrs_cycles_in_stackshot(ssbuf, sslen); 1370 1371 struct scenario delta_scenario = { 1372 .name = "delta-instrs-cycles-next", 1373 .flags = (STACKSHOT_SAVE_LOADINFO | STACKSHOT_INSTRS_CYCLES 1374 | STACKSHOT_KCDATA_FORMAT 1375 | STACKSHOT_COLLECT_DELTA_SNAPSHOT), 1376 .since_timestamp = stackshot_time, 1377 }; 1378 1379 take_stackshot(&delta_scenario, false, ^(void *dssbuf, size_t dsslen) { 1380 parse_stackshot(PARSE_STACKSHOT_DELTA, dssbuf, dsslen, nil); 1381 expect_instrs_cycles_in_stackshot(dssbuf, dsslen); 1382 }); 1383 }); 1384} 1385 1386static void 1387check_thread_groups_supported() 1388{ 1389 int err; 1390 int supported = 0; 1391 size_t supported_size = sizeof(supported); 1392 err = sysctlbyname("kern.thread_groups_supported", &supported, &supported_size, NULL, 0); 1393 1394 if (err || !supported) 1395 T_SKIP("thread groups not supported on this system"); 1396} 1397 1398T_DECL(thread_groups, "test getting thread groups in stackshot", T_META_TAG_VM_PREFERRED) 1399{ 1400 check_thread_groups_supported(); 1401 1402 struct scenario scenario = { 1403 .name = "thread-groups", 1404 .flags = (STACKSHOT_SAVE_LOADINFO | STACKSHOT_THREAD_GROUP 1405 | STACKSHOT_KCDATA_FORMAT), 1406 }; 1407 1408 T_LOG("attempting to take stackshot with thread group flag"); 1409 take_stackshot(&scenario, false, ^(void *ssbuf, size_t sslen) { 1410 parse_thread_group_stackshot(ssbuf, sslen); 1411 }); 1412} 1413 1414T_DECL(compactinfo, "test compactinfo inclusion", T_META_TAG_VM_PREFERRED) 1415{ 1416 struct scenario scenario = { 1417 .name = "compactinfo", 1418 .target_pid = getpid(), 1419 .flags = (STACKSHOT_SAVE_LOADINFO | STACKSHOT_SAVE_DYLD_COMPACTINFO 1420 | STACKSHOT_KCDATA_FORMAT), 1421 }; 1422 1423 T_LOG("attempting to take stackshot with compactinfo flag"); 1424 take_stackshot(&scenario, false, ^(void *ssbuf, size_t sslen) { 1425 parse_stackshot(PARSE_STACKSHOT_COMPACTINFO | PARSE_STACKSHOT_TARGETPID, ssbuf, sslen, nil); 1426 }); 1427} 1428 1429T_DECL(suspendinfo, "test task suspend info inclusion", T_META_TAG_VM_PREFERRED) 1430{ 1431 struct scenario scenario = { 1432 .name = "suspendinfo", 1433 .target_pid = getpid(), 1434 .flags = (STACKSHOT_SAVE_LOADINFO | STACKSHOT_KCDATA_FORMAT), 1435 }; 1436 1437 T_LOG("attempting to take stackshot with suspendinfo flag"); 1438 take_stackshot(&scenario, false, ^(void *ssbuf, size_t sslen) { 1439 parse_stackshot(PARSE_STACKSHOT_SUSPENDINFO | PARSE_STACKSHOT_TARGETPID, ssbuf, sslen, nil); 1440 }); 1441} 1442 1443static NSMutableSet * find_driverkit_pids(io_registry_entry_t root) { 1444 NSMutableSet * driverkit_pids = [NSMutableSet setWithCapacity:3]; 1445 io_registry_entry_t current = IO_OBJECT_NULL; 1446 io_iterator_t iter = IO_OBJECT_NULL; 1447 1448 T_EXPECT_MACH_SUCCESS(IORegistryEntryGetChildIterator(root, kIOServicePlane, &iter), "get registry iterator"); 1449 1450 while ((current = IOIteratorNext(iter)) != IO_OBJECT_NULL) { 1451 if (_IOObjectConformsTo(current, "IOUserServer", kIOClassNameOverrideNone)) { 1452 CFMutableDictionaryRef cfProperties = NULL; 1453 NSMutableDictionary * properties; 1454 NSString * client_creator_info; 1455 NSArray<NSString *> *creator_info_array; 1456 pid_t pid; 1457 1458 T_QUIET; T_EXPECT_MACH_SUCCESS(IORegistryEntryCreateCFProperties(current, &cfProperties, kCFAllocatorDefault, kNilOptions), "get properties"); 1459 properties = CFBridgingRelease(cfProperties); 1460 T_QUIET; T_ASSERT_NOTNULL(properties, "properties is not null"); 1461 client_creator_info = properties[@kIOUserClientCreatorKey]; 1462 creator_info_array = [client_creator_info componentsSeparatedByString:@","]; 1463 if ([creator_info_array[0] hasPrefix:@"pid"]) { 1464 NSArray<NSString *> *pid_info = [creator_info_array[0] componentsSeparatedByString:@" "]; 1465 T_QUIET; T_ASSERT_EQ(pid_info.count, 2UL, "Get pid info components from %s", creator_info_array[0].UTF8String); 1466 pid = pid_info[1].intValue; 1467 } else { 1468 T_ASSERT_FAIL("No pid info in client creator info: %s", client_creator_info.UTF8String); 1469 } 1470 T_LOG("Found driver pid %d", pid); 1471 [driverkit_pids addObject:[NSNumber numberWithInt:pid]]; 1472 } else { 1473 [driverkit_pids unionSet:find_driverkit_pids(current)]; 1474 } 1475 IOObjectRelease(current); 1476 } 1477 1478 IOObjectRelease(iter); 1479 return driverkit_pids; 1480} 1481 1482T_DECL(driverkit, "test driverkit inclusion", T_META_TAG_VM_PREFERRED) 1483{ 1484 struct scenario scenario = { 1485 .name = "driverkit", 1486 .target_kernel = true, 1487 .flags = (STACKSHOT_SAVE_LOADINFO | STACKSHOT_KCDATA_FORMAT 1488 | STACKSHOT_INCLUDE_DRIVER_THREADS_IN_KERNEL), 1489 }; 1490 1491 io_registry_entry_t root = IORegistryGetRootEntry(kIOMainPortDefault); 1492 NSMutableSet * driverkit_pids = find_driverkit_pids(root); 1493 IOObjectRelease(root); 1494 1495 T_LOG("expecting to find %lu driverkit processes", [driverkit_pids count]); 1496 T_LOG("attempting to take stackshot with STACKSHOT_INCLUDE_DRIVER_THREADS_IN_KERNEL flag"); 1497 take_stackshot(&scenario, false, ^(void *ssbuf, size_t sslen) { 1498 parse_stackshot(PARSE_STACKSHOT_DRIVERKIT | PARSE_STACKSHOT_TARGETPID, ssbuf, sslen, @{ 1499 driverkit_found_key: ^(pid_t pid) { 1500 [driverkit_pids removeObject:[NSNumber numberWithInt:pid]]; 1501 }}); 1502 }); 1503 1504 T_EXPECT_EQ([driverkit_pids count], (NSUInteger)0, "found expected number of driverkit processes"); 1505} 1506 1507static void 1508parse_page_table_asid_stackshot(void **ssbuf, size_t sslen) 1509{ 1510 bool seen_asid = false; 1511 bool seen_page_table_snapshot = false; 1512 bool seen_task = false; 1513 int container = 0; 1514 int task_container = -1; 1515 kcdata_iter_t iter = kcdata_iter(ssbuf, sslen); 1516 T_ASSERT_EQ(kcdata_iter_type(iter), KCDATA_BUFFER_BEGIN_STACKSHOT, 1517 "buffer provided is a stackshot"); 1518 1519 iter = kcdata_iter_next(iter); 1520 KCDATA_ITER_FOREACH(iter) { 1521 switch (kcdata_iter_type(iter)) { 1522 /* There's a slight chance that we see a transit version of this task 1523 * in the stackshot, so we want to make sure to check both */ 1524 case KCDATA_TYPE_CONTAINER_BEGIN: { 1525 container++; 1526 if (kcdata_iter_container_type(iter) == STACKSHOT_KCCONTAINER_TASK) { 1527 seen_asid = seen_page_table_snapshot = false; 1528 task_container = container; 1529 } 1530 break; 1531 } 1532 case KCDATA_TYPE_CONTAINER_END: { 1533 if (container == task_container) { 1534 task_container = -1; 1535 seen_task = true; 1536 T_ASSERT_TRUE(seen_page_table_snapshot, "check that we have seen a page table snapshot"); 1537 T_ASSERT_TRUE(seen_asid, "check that we have seen an ASID"); 1538 } 1539 container--; 1540 break; 1541 } 1542 case KCDATA_TYPE_ARRAY: { 1543 T_QUIET; 1544 T_ASSERT_TRUE(kcdata_iter_array_valid(iter), 1545 "checked that array is valid"); 1546 1547 if (kcdata_iter_array_elem_type(iter) != STACKSHOT_KCTYPE_PAGE_TABLES) { 1548 continue; 1549 } 1550 1551 T_ASSERT_FALSE(seen_page_table_snapshot, "check that we haven't yet seen a page table snapshot"); 1552 seen_page_table_snapshot = true; 1553 1554 T_ASSERT_EQ((size_t) kcdata_iter_array_elem_size(iter), sizeof(uint64_t), 1555 "check that each element of the pagetable dump is the expected size"); 1556 1557 uint64_t *pt_array = kcdata_iter_payload(iter); 1558 uint32_t elem_count = kcdata_iter_array_elem_count(iter); 1559 uint32_t j; 1560 bool nonzero_tte = false; 1561 for (j = 0; j < elem_count;) { 1562 T_QUIET; T_ASSERT_LE(j + 4, elem_count, "check for valid page table segment header"); 1563 uint64_t pa = pt_array[j]; 1564 uint64_t num_entries = pt_array[j + 1]; 1565 uint64_t start_va = pt_array[j + 2]; 1566 uint64_t end_va = pt_array[j + 3]; 1567 1568 T_QUIET; T_ASSERT_NE(pa, (uint64_t) 0, "check that the pagetable physical address is non-zero"); 1569 T_QUIET; T_ASSERT_EQ(pa % (num_entries * sizeof(uint64_t)), (uint64_t) 0, "check that the pagetable physical address is correctly aligned"); 1570 T_QUIET; T_ASSERT_NE(num_entries, (uint64_t) 0, "check that a pagetable region has more than 0 entries"); 1571 T_QUIET; T_ASSERT_LE(j + 4 + num_entries, (uint64_t) elem_count, "check for sufficient space in page table array"); 1572 T_QUIET; T_ASSERT_GT(end_va, start_va, "check for valid VA bounds in page table segment header"); 1573 1574 for (uint32_t k = j + 4; k < (j + 4 + num_entries); ++k) { 1575 if (pt_array[k] != 0) { 1576 nonzero_tte = true; 1577 T_QUIET; T_ASSERT_EQ((pt_array[k] >> 48) & 0xf, (uint64_t) 0, "check that bits[48:51] of arm64 TTE are clear"); 1578 // L0-L2 table and non-compressed L3 block entries should always have bit 1 set; assumes L0-L2 blocks will not be used outside the kernel 1579 bool table = ((pt_array[k] & 0x2) != 0); 1580 if (table) { 1581 T_QUIET; T_ASSERT_NE(pt_array[k] & ((1ULL << 48) - 1) & ~((1ULL << 12) - 1), (uint64_t) 0, "check that arm64 TTE physical address is non-zero"); 1582 } else { // should be a compressed PTE 1583 T_QUIET; T_ASSERT_NE(pt_array[k] & 0xC000000000000000ULL, (uint64_t) 0, "check that compressed PTE has at least one of bits [63:62] set"); 1584 T_QUIET; T_ASSERT_EQ(pt_array[k] & ~0xC000000000000000ULL, (uint64_t) 0, "check that compressed PTE has no other bits besides [63:62] set"); 1585 } 1586 } 1587 } 1588 1589 j += (4 + num_entries); 1590 } 1591 T_ASSERT_TRUE(nonzero_tte, "check that we saw at least one non-empty TTE"); 1592 T_ASSERT_EQ(j, elem_count, "check that page table dump size matches extent of last header"); 1593 break; 1594 } 1595 case STACKSHOT_KCTYPE_ASID: { 1596 T_ASSERT_FALSE(seen_asid, "check that we haven't yet seen an ASID"); 1597 seen_asid = true; 1598 } 1599 } 1600 } 1601 1602 T_QUIET; T_ASSERT_TRUE(seen_task, "check that we have seen a complete task container"); 1603} 1604 1605T_DECL(dump_page_tables, "test stackshot page table dumping support", T_META_TAG_VM_PREFERRED) 1606{ 1607 struct scenario scenario = { 1608 .name = "asid-page-tables", 1609 .flags = (STACKSHOT_KCDATA_FORMAT | STACKSHOT_ASID | STACKSHOT_PAGE_TABLES), 1610 .size_hint = (9ull << 20), // 9 MB 1611 .target_pid = getpid(), 1612 .maybe_unsupported = true, 1613 .maybe_enomem = true, 1614 }; 1615 1616 T_LOG("attempting to take stackshot with ASID and page table flags"); 1617 take_stackshot(&scenario, false, ^(void *ssbuf, size_t sslen) { 1618 parse_page_table_asid_stackshot(ssbuf, sslen); 1619 }); 1620} 1621 1622static void stackshot_verify_current_proc_uuid_info(void **ssbuf, size_t sslen, uint64_t expected_offset, const struct proc_uniqidentifierinfo *proc_info_data) 1623{ 1624 const uuid_t *current_uuid = (const uuid_t *)(&proc_info_data->p_uuid); 1625 1626 kcdata_iter_t iter = kcdata_iter(ssbuf, sslen); 1627 T_ASSERT_EQ(kcdata_iter_type(iter), KCDATA_BUFFER_BEGIN_STACKSHOT, "buffer provided is a stackshot"); 1628 1629 iter = kcdata_iter_next(iter); 1630 1631 KCDATA_ITER_FOREACH(iter) { 1632 switch (kcdata_iter_type(iter)) { 1633 case KCDATA_TYPE_ARRAY: { 1634 T_QUIET; T_ASSERT_TRUE(kcdata_iter_array_valid(iter), "checked that array is valid"); 1635 if (kcdata_iter_array_elem_type(iter) == KCDATA_TYPE_LIBRARY_LOADINFO64) { 1636 struct user64_dyld_uuid_info *info = (struct user64_dyld_uuid_info *) kcdata_iter_payload(iter); 1637 if (uuid_compare(*current_uuid, info->imageUUID) == 0) { 1638 T_ASSERT_EQ(expected_offset, info->imageLoadAddress, "found matching UUID with matching binary offset"); 1639 return; 1640 } 1641 } else if (kcdata_iter_array_elem_type(iter) == KCDATA_TYPE_LIBRARY_LOADINFO) { 1642 struct user32_dyld_uuid_info *info = (struct user32_dyld_uuid_info *) kcdata_iter_payload(iter); 1643 if (uuid_compare(*current_uuid, info->imageUUID) == 0) { 1644 T_ASSERT_EQ(expected_offset, ((uint64_t) info->imageLoadAddress), "found matching UUID with matching binary offset"); 1645 return; 1646 } 1647 } 1648 break; 1649 } 1650 default: 1651 break; 1652 } 1653 } 1654 1655 T_FAIL("failed to find matching UUID in stackshot data"); 1656} 1657 1658T_DECL(translated, 1659 "tests translated bit is set correctly", 1660 T_META_TAG_VM_PREFERRED, 1661 T_META_ENABLED(false /* rdar://133956022 */)) 1662{ 1663#if !(TARGET_OS_OSX && TARGET_CPU_ARM64) 1664 T_SKIP("Only valid on Apple silicon Macs") 1665#endif 1666 // Get path of stackshot_translated_child helper binary 1667 char path[PATH_MAX]; 1668 uint32_t path_size = sizeof(path); 1669 T_QUIET; T_ASSERT_POSIX_ZERO(_NSGetExecutablePath(path, &path_size), "_NSGetExecutablePath"); 1670 char* binary_name = strrchr(path, '/'); 1671 if (binary_name) binary_name++; 1672 T_QUIET; T_ASSERT_NOTNULL(binary_name, "Find basename in path '%s'", path); 1673 strlcpy(binary_name, "stackshot_translated_child", path_size - (binary_name - path)); 1674 char *args[] = { path, NULL }; 1675 1676 dispatch_source_t child_sig_src; 1677 dispatch_semaphore_t child_ready_sem = dispatch_semaphore_create(0); 1678 T_QUIET; T_ASSERT_NOTNULL(child_ready_sem, "exec child semaphore"); 1679 1680 dispatch_queue_t signal_processing_q = dispatch_queue_create("signal processing queue", NULL); 1681 T_QUIET; T_ASSERT_NOTNULL(signal_processing_q, "signal processing queue"); 1682 1683 signal(SIGUSR1, SIG_IGN); 1684 child_sig_src = dispatch_source_create(DISPATCH_SOURCE_TYPE_SIGNAL, SIGUSR1, 0, signal_processing_q); 1685 T_QUIET; T_ASSERT_NOTNULL(child_sig_src, "dispatch_source_create (child_sig_src)"); 1686 1687 dispatch_source_set_event_handler(child_sig_src, ^{ dispatch_semaphore_signal(child_ready_sem); }); 1688 dispatch_activate(child_sig_src); 1689 1690 // Spawn child 1691 pid_t pid; 1692 T_LOG("spawning translated child"); 1693 T_QUIET; T_ASSERT_POSIX_ZERO(posix_spawn(&pid, args[0], NULL, NULL, args, NULL), "spawned process '%s' with PID %d", args[0], pid); 1694 1695 // Wait for the the child to spawn up 1696 dispatch_semaphore_wait(child_ready_sem, DISPATCH_TIME_FOREVER); 1697 1698 // Make sure the child is running and is translated 1699 int mib[] = { CTL_KERN, KERN_PROC, KERN_PROC_PID, pid }; 1700 struct kinfo_proc process_info; 1701 size_t bufsize = sizeof(process_info); 1702 T_QUIET; T_ASSERT_POSIX_SUCCESS(sysctl(mib, (unsigned)(sizeof(mib)/sizeof(int)), &process_info, &bufsize, NULL, 0), "get translated child process info"); 1703 T_QUIET; T_ASSERT_GT(bufsize, (size_t)0, "process info is not empty"); 1704 T_QUIET; T_ASSERT_TRUE((process_info.kp_proc.p_flag & P_TRANSLATED), "KERN_PROC_PID reports child is translated"); 1705 1706 T_LOG("capturing stackshot"); 1707 1708 struct scenario scenario = { 1709 .name = "translated", 1710 .flags = (STACKSHOT_SAVE_LOADINFO | STACKSHOT_GET_GLOBAL_MEM_STATS 1711 | STACKSHOT_SAVE_IMP_DONATION_PIDS | STACKSHOT_KCDATA_FORMAT), 1712 }; 1713 1714 take_stackshot(&scenario, true, ^( void *ssbuf, size_t sslen) { 1715 parse_stackshot(PARSE_STACKSHOT_TRANSLATED, ssbuf, sslen, @{translated_child_pid_key: @(pid)}); 1716 }); 1717 1718 // Kill the child 1719 int status; 1720 T_QUIET; T_ASSERT_POSIX_SUCCESS(kill(pid, SIGTERM), "kill translated child"); 1721 T_QUIET; T_ASSERT_POSIX_SUCCESS(waitpid(pid, &status, 0), "waitpid on translated child"); 1722 1723} 1724 1725T_DECL(proc_uuid_info, "tests that the main binary UUID for a proc is always populated", T_META_TAG_VM_PREFERRED) 1726{ 1727 struct proc_uniqidentifierinfo proc_info_data = { }; 1728 mach_msg_type_number_t count; 1729 kern_return_t kernel_status; 1730 task_dyld_info_data_t task_dyld_info; 1731 struct dyld_all_image_infos *target_infos; 1732 int retval; 1733 bool found_image_in_image_infos = false; 1734 uint64_t expected_mach_header_offset = 0; 1735 1736 /* Find the UUID of our main binary */ 1737 retval = proc_pidinfo(getpid(), PROC_PIDUNIQIDENTIFIERINFO, 0, &proc_info_data, sizeof(proc_info_data)); 1738 T_QUIET; T_EXPECT_POSIX_SUCCESS(retval, "proc_pidinfo PROC_PIDUNIQIDENTIFIERINFO"); 1739 T_QUIET; T_ASSERT_EQ_INT(retval, (int) sizeof(proc_info_data), "proc_pidinfo PROC_PIDUNIQIDENTIFIERINFO returned data"); 1740 1741 uuid_string_t str = {}; 1742 uuid_unparse(*(uuid_t*)&proc_info_data.p_uuid, str); 1743 T_LOG("Found current UUID is %s", str); 1744 1745 /* Find the location of the dyld image info metadata */ 1746 count = TASK_DYLD_INFO_COUNT; 1747 kernel_status = task_info(mach_task_self(), TASK_DYLD_INFO, (task_info_t)&task_dyld_info, &count); 1748 T_QUIET; T_ASSERT_EQ(kernel_status, KERN_SUCCESS, "retrieve task_info for TASK_DYLD_INFO"); 1749 1750 target_infos = (struct dyld_all_image_infos *)task_dyld_info.all_image_info_addr; 1751 1752 /* Find our binary in the dyld image info array */ 1753 for (int i = 0; i < (int) target_infos->uuidArrayCount; i++) { 1754 if (uuid_compare(target_infos->uuidArray[i].imageUUID, *(uuid_t*)&proc_info_data.p_uuid) == 0) { 1755 expected_mach_header_offset = (uint64_t) target_infos->uuidArray[i].imageLoadAddress; 1756 found_image_in_image_infos = true; 1757 } 1758 } 1759 1760 T_ASSERT_TRUE(found_image_in_image_infos, "found binary image in dyld image info list"); 1761 1762 /* Overwrite the dyld image info data so the kernel has to fallback to the UUID stored in the proc structure */ 1763 target_infos->uuidArrayCount = 0; 1764 1765 struct scenario scenario = { 1766 .name = "proc_uuid_info", 1767 .flags = (STACKSHOT_SAVE_LOADINFO | STACKSHOT_KCDATA_FORMAT), 1768 .target_pid = getpid(), 1769 }; 1770 1771 T_LOG("attempting to take stackshot for current PID"); 1772 take_stackshot(&scenario, false, ^(void *ssbuf, size_t sslen) { 1773 stackshot_verify_current_proc_uuid_info(ssbuf, sslen, expected_mach_header_offset, &proc_info_data); 1774 }); 1775} 1776 1777T_DECL(cseg_waitinfo, "test that threads stuck in the compressor report correct waitinfo", T_META_TAG_VM_PREFERRED) 1778{ 1779 struct scenario scenario = { 1780 .name = "cseg_waitinfo", 1781 .quiet = false, 1782 .flags = (STACKSHOT_THREAD_WAITINFO | STACKSHOT_KCDATA_FORMAT), 1783 }; 1784 __block uint64_t thread_id = 0; 1785 1786 dispatch_queue_t dq = dispatch_queue_create("com.apple.stackshot.cseg_waitinfo", NULL); 1787 dispatch_semaphore_t child_ok = dispatch_semaphore_create(0); 1788 1789 dispatch_async(dq, ^{ 1790 pthread_threadid_np(NULL, &thread_id); 1791 dispatch_semaphore_signal(child_ok); 1792 int val = 1; 1793 T_ASSERT_POSIX_SUCCESS(sysctlbyname("kern.cseg_wedge_thread", NULL, NULL, &val, sizeof(val)), "wedge child thread"); 1794 }); 1795 1796 dispatch_semaphore_wait(child_ok, DISPATCH_TIME_FOREVER); 1797 sleep(1); 1798 1799 T_LOG("taking stackshot"); 1800 take_stackshot(&scenario, false, ^(void *ssbuf, size_t sslen) { 1801 int val = 1; 1802 T_ASSERT_POSIX_SUCCESS(sysctlbyname("kern.cseg_unwedge_thread", NULL, NULL, &val, sizeof(val)), "unwedge child thread"); 1803 parse_stackshot(PARSE_STACKSHOT_WAITINFO_CSEG, ssbuf, sslen, @{cseg_expected_threadid_key: @(thread_id)}); 1804 }); 1805} 1806 1807static void 1808srp_send( 1809 mach_port_t send_port, 1810 mach_port_t reply_port, 1811 mach_port_t msg_port) 1812{ 1813 kern_return_t ret = 0; 1814 1815 struct test_msg { 1816 mach_msg_header_t header; 1817 mach_msg_body_t body; 1818 mach_msg_port_descriptor_t port_descriptor; 1819 }; 1820 struct test_msg send_msg = { 1821 .header = { 1822 .msgh_remote_port = send_port, 1823 .msgh_local_port = reply_port, 1824 .msgh_bits = MACH_MSGH_BITS_SET(MACH_MSG_TYPE_COPY_SEND, 1825 reply_port ? MACH_MSG_TYPE_MAKE_SEND_ONCE : 0, 1826 MACH_MSG_TYPE_MOVE_SEND, 1827 MACH_MSGH_BITS_COMPLEX), 1828 .msgh_id = 0x100, 1829 .msgh_size = sizeof(send_msg), 1830 }, 1831 .body = { 1832 .msgh_descriptor_count = 1, 1833 }, 1834 .port_descriptor = { 1835 .name = msg_port, 1836 .disposition = MACH_MSG_TYPE_MOVE_RECEIVE, 1837 .type = MACH_MSG_PORT_DESCRIPTOR, 1838 }, 1839 }; 1840 1841 if (msg_port == MACH_PORT_NULL) { 1842 send_msg.body.msgh_descriptor_count = 0; 1843 } 1844 1845 ret = mach_msg(&(send_msg.header), 1846 MACH_SEND_MSG | 1847 MACH_SEND_TIMEOUT | 1848 MACH_SEND_OVERRIDE, 1849 send_msg.header.msgh_size, 1850 0, 1851 MACH_PORT_NULL, 1852 10000, 1853 0); 1854 1855 T_ASSERT_MACH_SUCCESS(ret, "client mach_msg"); 1856} 1857 1858T_HELPER_DECL(srp_client, 1859 "Client used for the special_reply_port test") 1860{ 1861 pid_t ppid = getppid(); 1862 dispatch_semaphore_t can_continue = dispatch_semaphore_create(0); 1863 dispatch_queue_t dq = dispatch_queue_create("client_signalqueue", NULL); 1864 dispatch_source_t sig_src; 1865 1866 mach_msg_return_t mr; 1867 mach_port_t service_port; 1868 mach_port_t conn_port; 1869 mach_port_t special_reply_port; 1870 mach_port_options_t opts = { 1871 .flags = MPO_INSERT_SEND_RIGHT, 1872 }; 1873 1874 signal(SIGUSR1, SIG_IGN); 1875 sig_src = dispatch_source_create(DISPATCH_SOURCE_TYPE_SIGNAL, SIGUSR1, 0, dq); 1876 1877 dispatch_source_set_event_handler(sig_src, ^{ 1878 dispatch_semaphore_signal(can_continue); 1879 }); 1880 dispatch_activate(sig_src); 1881 1882 /* lookup the mach service port for the parent */ 1883 kern_return_t kr = bootstrap_look_up(bootstrap_port, 1884 SRP_SERVICE_NAME, &service_port); 1885 T_QUIET; T_ASSERT_MACH_SUCCESS(kr, "client bootstrap_look_up"); 1886 1887 /* create the send-once right (special reply port) and message to send to the server */ 1888 kr = mach_port_construct(mach_task_self(), &opts, 0ull, &conn_port); 1889 T_QUIET; T_ASSERT_MACH_SUCCESS(kr, "mach_port_construct"); 1890 1891 special_reply_port = thread_get_special_reply_port(); 1892 T_QUIET; T_ASSERT_TRUE(MACH_PORT_VALID(special_reply_port), "get_thread_special_reply_port"); 1893 1894 /* send the message with the special reply port */ 1895 srp_send(service_port, special_reply_port, conn_port); 1896 1897 /* signal the parent to continue */ 1898 kill(ppid, SIGUSR1); 1899 1900 struct { 1901 mach_msg_header_t header; 1902 mach_msg_body_t body; 1903 mach_msg_port_descriptor_t port_descriptor; 1904 } rcv_msg = { 1905 .header = 1906 { 1907 .msgh_remote_port = MACH_PORT_NULL, 1908 .msgh_local_port = special_reply_port, 1909 .msgh_size = sizeof(rcv_msg), 1910 }, 1911 }; 1912 1913 /* wait on the reply from the parent (that we will never receive) */ 1914 mr = mach_msg(&(rcv_msg.header), 1915 (MACH_RCV_MSG | MACH_RCV_SYNC_WAIT), 1916 0, 1917 rcv_msg.header.msgh_size, 1918 special_reply_port, 1919 MACH_MSG_TIMEOUT_NONE, 1920 service_port); 1921 1922 /* not expected to execute as parent will SIGKILL client... */ 1923 T_LOG("client process exiting after sending message to parent (server)"); 1924} 1925 1926enum srp_test_type { 1927 SRP_TEST_THREAD, /* expect waiter on current thread */ 1928 SRP_TEST_PID, /* expect waiter on current PID */ 1929 SRP_TEST_EITHER, /* waiter could be on either */ 1930}; 1931 1932static void 1933check_srp_test(const char *name, enum srp_test_type ty) 1934{ 1935 struct scenario scenario = { 1936 .name = name, 1937 .quiet = false, 1938 .flags = (STACKSHOT_THREAD_WAITINFO | STACKSHOT_KCDATA_FORMAT), 1939 }; 1940 uint64_t thread_id = 0; 1941 pthread_threadid_np(NULL, &thread_id); 1942 if (ty == SRP_TEST_THREAD) { 1943 take_stackshot(&scenario, false, ^(void *ssbuf, size_t sslen) { 1944 parse_stackshot(PARSE_STACKSHOT_WAITINFO_SRP, ssbuf, sslen, 1945 @{srp_expected_threadid_key: @(thread_id)}); 1946 }); 1947 } else if (ty == SRP_TEST_PID) { 1948 take_stackshot(&scenario, false, ^(void *ssbuf, size_t sslen) { 1949 parse_stackshot(PARSE_STACKSHOT_WAITINFO_SRP, ssbuf, sslen, 1950 @{srp_expected_pid_key: @(getpid())}); 1951 }); 1952 } else { 1953 take_stackshot(&scenario, false, ^(void *ssbuf, size_t sslen) { 1954 parse_stackshot(PARSE_STACKSHOT_WAITINFO_SRP, ssbuf, sslen, 1955 @{srp_expected_pid_key: @(getpid()), srp_expected_threadid_key: @(thread_id)}); 1956 }); 1957 } 1958 1959} 1960 1961 1962/* 1963 * Tests the stackshot wait info plumbing for synchronous IPC that doesn't use kevent on the server. 1964 * 1965 * (part 1): tests the scenario where a client sends a request that includes a special reply port 1966 * to a server that doesn't receive the message and doesn't copy the send-once right 1967 * into its address space as a result. for this case the special reply port is enqueued 1968 * in a port and we check which task has that receive right and use that info. (rdar://60440338) 1969 * (part 2): tests the scenario where a client sends a request that includes a special reply port 1970 * to a server that receives the message and copies in the send-once right, but doesn't 1971 * reply to the client. for this case the special reply port is copied out and the kernel 1972 * stashes the info about which task copied out the send once right. (rdar://60440592) 1973 * (part 3): tests the same as part 2, but uses kevents, which allow for 1974 * priority inheritance 1975 */ 1976T_DECL(special_reply_port, "test that tasks using special reply ports have correct waitinfo", T_META_TAG_VM_PREFERRED) 1977{ 1978 dispatch_semaphore_t can_continue = dispatch_semaphore_create(0); 1979 dispatch_queue_t dq = dispatch_queue_create("signalqueue", NULL); 1980 dispatch_queue_t machdq = dispatch_queue_create("machqueue", NULL); 1981 dispatch_source_t sig_src; 1982 char path[PATH_MAX]; 1983 uint32_t path_size = sizeof(path); 1984 T_ASSERT_POSIX_ZERO(_NSGetExecutablePath(path, &path_size), "_NSGetExecutablePath"); 1985 char *client_args[] = { path, "-n", "srp_client", NULL }; 1986 pid_t client_pid; 1987 int sp_ret; 1988 kern_return_t kr; 1989 mach_port_t port; 1990 1991 /* setup the signal handler in the parent (server) */ 1992 T_LOG("setup sig handlers"); 1993 signal(SIGUSR1, SIG_IGN); 1994 sig_src = dispatch_source_create(DISPATCH_SOURCE_TYPE_SIGNAL, SIGUSR1, 0, dq); 1995 1996 dispatch_source_set_event_handler(sig_src, ^{ 1997 dispatch_semaphore_signal(can_continue); 1998 }); 1999 dispatch_activate(sig_src); 2000 2001 /* register with the mach service name so the client can lookup and send a message to the parent (server) */ 2002 T_LOG("Server about to check in"); 2003 kr = bootstrap_check_in(bootstrap_port, SRP_SERVICE_NAME, &port); 2004 T_ASSERT_MACH_SUCCESS(kr, "server bootstrap_check_in"); 2005 2006 T_LOG("Launching client"); 2007 sp_ret = posix_spawn(&client_pid, client_args[0], NULL, NULL, client_args, NULL); 2008 T_QUIET; T_ASSERT_POSIX_ZERO(sp_ret, "spawned process '%s' with PID %d", client_args[0], client_pid); 2009 T_LOG("Spawned client as PID %d", client_pid); 2010 2011 dispatch_semaphore_wait(can_continue, DISPATCH_TIME_FOREVER); 2012 T_LOG("Ready to take stackshot, but waiting 1s for the coast to clear"); 2013 2014 /* 2015 * can_continue indicates the client has signaled us, but we want to make 2016 * sure they've actually blocked sending their mach message. It's cheesy, but 2017 * sleep() works for this. 2018 */ 2019 sleep(1); 2020 2021 /* 2022 * take the stackshot without calling receive to verify that the stackshot wait 2023 * info shows our (the server) thread for the scenario where the server has yet to 2024 * receive the message. 2025 */ 2026 T_LOG("Taking stackshot for part 1 coverage"); 2027 check_srp_test("srp", SRP_TEST_THREAD); 2028 2029 /* 2030 * receive the message from the client (which should copy the send once right into 2031 * our address space). 2032 */ 2033 struct { 2034 mach_msg_header_t header; 2035 mach_msg_body_t body; 2036 mach_msg_port_descriptor_t port_descriptor; 2037 } rcv_msg = { 2038 .header = 2039 { 2040 .msgh_remote_port = MACH_PORT_NULL, 2041 .msgh_local_port = port, 2042 .msgh_size = sizeof(rcv_msg), 2043 }, 2044 }; 2045 2046 T_LOG("server: starting sync receive\n"); 2047 2048 mach_msg_return_t mr; 2049 mr = mach_msg(&(rcv_msg.header), 2050 (MACH_RCV_MSG | MACH_RCV_TIMEOUT), 2051 0, 2052 4096, 2053 port, 2054 10000, 2055 MACH_PORT_NULL); 2056 T_QUIET; T_ASSERT_MACH_SUCCESS(mr, "mach_msg() recieve of message from client"); 2057 2058 /* 2059 * take the stackshot to verify that the stackshot wait info shows our (the server) PID 2060 * for the scenario where the server has received the message and copied in the send-once right. 2061 */ 2062 T_LOG("Taking stackshot for part 2 coverage"); 2063 check_srp_test("srp", SRP_TEST_PID); 2064 2065 /* cleanup - kill the client */ 2066 T_ASSERT_POSIX_SUCCESS(kill(client_pid, SIGKILL), "killing client"); 2067 T_ASSERT_POSIX_SUCCESS(waitpid(client_pid, NULL, 0), "waiting for the client to exit"); 2068 2069 // do it again, but using kevents 2070 T_LOG("Launching client"); 2071 sp_ret = posix_spawn(&client_pid, client_args[0], NULL, NULL, client_args, NULL); 2072 T_QUIET; T_ASSERT_POSIX_ZERO(sp_ret, "spawned process '%s' with PID %d", client_args[0], client_pid); 2073 T_LOG("Spawned client as PID %d", client_pid); 2074 2075 dispatch_semaphore_wait(can_continue, DISPATCH_TIME_FOREVER); 2076 T_LOG("Ready to take stackshot, but waiting 1s for the coast to clear"); 2077 2078 /* 2079 * can_continue indicates the client has signaled us, but we want to make 2080 * sure they've actually blocked sending their mach message. It's cheesy, but 2081 * sleep() works for this. 2082 */ 2083 sleep(1); 2084 2085 dispatch_mach_t dispatch_mach = dispatch_mach_create(SRP_SERVICE_NAME, machdq, 2086 ^(dispatch_mach_reason_t reason, 2087 dispatch_mach_msg_t message, 2088 mach_error_t error __unused) { 2089 switch (reason) { 2090 case DISPATCH_MACH_MESSAGE_RECEIVED: { 2091 size_t size = 0; 2092 mach_msg_header_t *msg __unused = dispatch_mach_msg_get_msg(message, &size); 2093 T_LOG("server: recieved %ld byte message", size); 2094 check_srp_test("turnstile_port_thread", SRP_TEST_THREAD); 2095 T_LOG("server: letting client go"); 2096 // drop the message on the ground, we'll kill the client later 2097 dispatch_semaphore_signal(can_continue); 2098 break; 2099 } 2100 default: 2101 break; 2102 } 2103 }); 2104 2105 dispatch_mach_connect(dispatch_mach, port, MACH_PORT_NULL, NULL); 2106 2107 dispatch_semaphore_wait(can_continue, DISPATCH_TIME_FOREVER); 2108 2109 /* cleanup - kill the client */ 2110 T_ASSERT_POSIX_SUCCESS(kill(client_pid, SIGKILL), "killing client"); 2111 T_ASSERT_POSIX_SUCCESS(waitpid(client_pid, NULL, 0), "waiting for the client to exit"); 2112} 2113 2114T_HELPER_DECL(throtlled_sp_client, 2115 "client that uses a connection port to send a message to a server") 2116{ 2117 mach_port_t conn_port, service_port, reply_port, *stash; 2118 mach_msg_type_number_t stash_cnt = 0; 2119 2120 kern_return_t kr = mach_ports_lookup(mach_task_self(), &stash, &stash_cnt); 2121 T_ASSERT_MACH_SUCCESS(kr, "mach_ports_lookup"); 2122 2123 service_port = stash[0]; 2124 T_ASSERT_TRUE(MACH_PORT_VALID(service_port), "valid service port"); 2125 mig_deallocate((vm_address_t)stash, stash_cnt * sizeof(stash[0])); 2126 2127 mach_port_options_t opts = { 2128 .flags = MPO_INSERT_SEND_RIGHT 2129 | MPO_CONNECTION_PORT, 2130 .service_port_name = service_port, 2131 }; 2132 2133 kr = mach_port_construct(mach_task_self(), &opts, 0ull, &conn_port); 2134 T_QUIET; T_ASSERT_MACH_SUCCESS(kr, "mach_port_construct"); 2135 2136 mach_port_options_t opts2 = { 2137 .flags = MPO_REPLY_PORT 2138 }; 2139 kr = mach_port_construct(mach_task_self(), &opts2, 0ull, &reply_port); 2140 T_QUIET; T_ASSERT_MACH_SUCCESS(kr, "mach_port_construct"); 2141 2142 /* XPC-like check-in message */ 2143 struct { 2144 mach_msg_header_t header; 2145 mach_msg_port_descriptor_t recvp; 2146 mach_msg_port_descriptor_t sendp; 2147 } checkin_message = { 2148 .header = 2149 { 2150 .msgh_remote_port = service_port, 2151 .msgh_local_port = MACH_PORT_NULL, 2152 .msgh_size = sizeof(checkin_message), 2153 .msgh_bits = MACH_MSGH_BITS(MACH_MSG_TYPE_COPY_SEND, 0), 2154 }, 2155 .recvp = 2156 { 2157 .type = MACH_MSG_PORT_DESCRIPTOR, 2158 .name = conn_port, 2159 .disposition = MACH_MSG_TYPE_MOVE_RECEIVE, 2160 }, 2161 .sendp = 2162 { 2163 .type = MACH_MSG_PORT_DESCRIPTOR, 2164 .name = reply_port, 2165 .disposition = MACH_MSG_TYPE_MAKE_SEND, 2166 } 2167 }; 2168 dispatch_mach_msg_t dmsg = dispatch_mach_msg_create((mach_msg_header_t *)&checkin_message, sizeof(checkin_message), 2169 DISPATCH_MACH_MSG_DESTRUCTOR_DEFAULT, NULL); 2170 2171 dispatch_queue_t machdq = dispatch_queue_create("machqueue", NULL); 2172 dispatch_mach_t dchannel = dispatch_mach_create(THROTTLED_SERVICE_NAME, machdq, 2173 ^(dispatch_mach_reason_t reason, 2174 dispatch_mach_msg_t message __unused, 2175 mach_error_t error __unused) { 2176 switch (reason) { 2177 case DISPATCH_MACH_CONNECTED: 2178 T_LOG("mach channel connected"); 2179 break; 2180 case DISPATCH_MACH_MESSAGE_SENT: 2181 T_LOG("sent mach message"); 2182 break; 2183 default: 2184 T_ASSERT_FAIL("Unexpected reply to channel reason %lu", reason); 2185 } 2186 }); 2187 dispatch_mach_connect(dchannel, reply_port, service_port, dmsg); 2188 dispatch_release(dmsg); 2189 2190 struct { 2191 mach_msg_header_t header; 2192 uint64_t request_id; 2193 } request = { 2194 .header = 2195 { 2196 .msgh_size = sizeof(request), 2197 .msgh_bits = MACH_MSGH_BITS(MACH_MSG_TYPE_COPY_SEND, MACH_MSG_TYPE_MAKE_SEND_ONCE), 2198 }, 2199 .request_id = 1, 2200 }; 2201 dispatch_mach_msg_t dmsg2 = dispatch_mach_msg_create((mach_msg_header_t *)&request, sizeof(request), 2202 DISPATCH_MACH_MSG_DESTRUCTOR_DEFAULT, NULL); 2203 2204 dispatch_mach_reason_t reason; 2205 mach_error_t error; 2206 2207 /* send the check-in message and the request message */ 2208 dispatch_mach_msg_t dreply = dispatch_mach_send_with_result_and_wait_for_reply(dchannel, 2209 dmsg2, 0, DISPATCH_MACH_SEND_DEFAULT, &reason, &error); 2210 dispatch_release(dmsg2); 2211 2212 /* not expected to execute as parent will SIGKILL client */ 2213 T_ASSERT_FAIL("client process exiting after receiving %s reply", dreply ? "non-null" : "null"); 2214} 2215 2216static void 2217check_throttled_sp(const char *test_name, uint64_t context, bool is_throttled) 2218{ 2219 struct scenario scenario = { 2220 .name = test_name, 2221 .quiet = false, 2222 .flags = (STACKSHOT_THREAD_WAITINFO | STACKSHOT_KCDATA_FORMAT), 2223 }; 2224 2225 T_LOG("taking stackshot %s", test_name); 2226 take_stackshot(&scenario, false, ^(void *ssbuf, size_t sslen) { 2227 parse_stackshot(PARSE_STACKSHOT_THROTTLED_SP, ssbuf, sslen, 2228 @{sp_throttled_expected_ctxt_key: @(context), 2229 sp_throttled_expect_flag: @(is_throttled)}); 2230 }); 2231} 2232 2233/* Take stackshot when a client is blocked on the service port of a process, in the scenario when 2234 * the process with the receive right for the service port is: 2235 * (a) Monitoring the service port using kevents 2236 * (b) Not monitoring the service port 2237 */ 2238T_DECL(throttled_sp, 2239 "test that service port throttled flag is propagated to the stackshot correctly", T_META_TAG_VM_PREFERRED) 2240{ 2241 mach_port_t service_port; 2242 __block dispatch_semaphore_t can_continue = dispatch_semaphore_create(0); 2243 2244 char path[PATH_MAX]; 2245 uint32_t path_size = sizeof(path); 2246 T_ASSERT_POSIX_ZERO(_NSGetExecutablePath(path, &path_size), "_NSGetExecutablePath"); 2247 char *client_args[] = { path, "-n", "throtlled_sp_client", NULL }; 2248 2249 __block uint64_t thread_id = 0; 2250 pid_t client_pid; 2251 int mark_throttled; 2252 2253 struct mach_service_port_info sp_info = {}; 2254 strcpy(sp_info.mspi_string_name, THROTTLED_SERVICE_NAME); 2255 sp_info.mspi_domain_type = (uint8_t)1; 2256 kern_return_t kr; 2257 2258 mach_port_options_t opts = { 2259 .flags = MPO_SERVICE_PORT | MPO_INSERT_SEND_RIGHT | MPO_CONTEXT_AS_GUARD | MPO_STRICT | MPO_TEMPOWNER, 2260 .service_port_info = &sp_info, 2261 }; 2262 2263 kr = mach_port_construct(mach_task_self(), &opts, 0ull, &service_port); 2264 T_ASSERT_MACH_SUCCESS(kr, "mach_port_construct %u", service_port); 2265 2266 /* Setup a dispatch source to monitor the service port similar to how launchd does. */ 2267 dispatch_queue_t machdq = dispatch_queue_create("machqueue", NULL); 2268 dispatch_source_t mach_src = dispatch_source_create(DISPATCH_SOURCE_TYPE_MACH_RECV, service_port, 2269 DISPATCH_MACH_RECV_SYNC_PEEK, machdq); 2270 dispatch_source_set_event_handler(mach_src, ^{ 2271 pthread_threadid_np(NULL, &thread_id); 2272 dispatch_semaphore_signal(can_continue); 2273 }); 2274 dispatch_activate(mach_src); 2275 2276 /* Stash the port in task to make sure child also gets it */ 2277 kr = mach_ports_register(mach_task_self(), &service_port, 1); 2278 T_QUIET; T_ASSERT_MACH_SUCCESS(kr, "mach_ports_register service port"); 2279 2280 mark_throttled = 1; 2281 kr = mach_port_set_attributes(mach_task_self(), service_port, MACH_PORT_SERVICE_THROTTLED, (mach_port_info_t)(&mark_throttled), 2282 MACH_PORT_SERVICE_THROTTLED_COUNT); 2283 T_QUIET; T_ASSERT_MACH_SUCCESS(kr, "mark service port as throttled"); 2284 2285 int rc = posix_spawn(&client_pid, client_args[0], NULL, NULL, client_args, NULL); 2286 T_QUIET; T_ASSERT_POSIX_ZERO(rc, "spawned process '%s' with PID %d", client_args[0], client_pid); 2287 T_LOG("Spawned client as PID %d", client_pid); 2288 2289 dispatch_semaphore_wait(can_continue, DISPATCH_TIME_FOREVER); 2290 2291 /* The service port has received the check-in message. Take stackshot for scenario (a). */ 2292 check_throttled_sp("throttled_service_port_monitored", thread_id, true); 2293 2294 /* This simulates a throttled spawn when the service port is no longer monitored. */ 2295 dispatch_source_cancel(mach_src); 2296 2297 /* Take stackshot for scenario (b) */ 2298 check_throttled_sp("throttled_service_port_unmonitored", (uint64_t)getpid(), true); 2299 2300 mark_throttled = 0; 2301 kr = mach_port_set_attributes(mach_task_self(), service_port, MACH_PORT_SERVICE_THROTTLED, (mach_port_info_t)(&mark_throttled), 2302 MACH_PORT_SERVICE_THROTTLED_COUNT); 2303 T_QUIET; T_ASSERT_MACH_SUCCESS(kr, "unmark service port as throttled"); 2304 2305 /* Throttled flag should not be set when the port is not throttled. */ 2306 check_throttled_sp("unthrottled_service_port_unmonitored", (uint64_t)getpid(), false); 2307 2308 /* cleanup - kill the client */ 2309 T_ASSERT_POSIX_SUCCESS(kill(client_pid, SIGKILL), "killing client"); 2310 T_ASSERT_POSIX_SUCCESS(waitpid(client_pid, NULL, 0), "waiting for the client to exit"); 2311} 2312 2313 2314char *const clpcctrl_path = "/usr/local/bin/clpcctrl"; 2315 2316static void 2317run_clpcctrl(char *const argv[]) { 2318 posix_spawnattr_t sattr; 2319 pid_t pid; 2320 int wstatus; 2321 2322 T_QUIET; T_ASSERT_POSIX_ZERO(posix_spawn(&pid, argv[0], NULL, NULL, argv, NULL), "spawn clpcctrl"); 2323 T_QUIET; T_ASSERT_POSIX_SUCCESS(waitpid(pid, &wstatus, 0), "wait for clpcctrl"); 2324 T_QUIET; T_ASSERT_TRUE(WIFEXITED(wstatus), "clpcctrl exited normally"); 2325 T_QUIET; T_ASSERT_POSIX_ZERO(WEXITSTATUS(wstatus), "clpcctrl exited successfully"); 2326 2327 uint64_t sched_recommended_cores = 1; 2328 size_t sched_recommended_cores_sz = sizeof(uint64_t); 2329 T_QUIET; T_ASSERT_POSIX_SUCCESS( 2330 sysctlbyname("kern.sched_recommended_cores", &sched_recommended_cores, &sched_recommended_cores_sz, NULL, 0), 2331 "get kern.sched_recommended_cores"); 2332 T_LOG("Recommended cores: 0x%llx", sched_recommended_cores); 2333} 2334 2335static void 2336restore_clpcctrl() { 2337 run_clpcctrl((char *const []) { clpcctrl_path, "-d", NULL }); 2338} 2339 2340#define CLUSTER_TYPE_SMP 0 2341#define CLUSTER_TYPE_E 1 2342#define CLUSTER_TYPE_P 2 2343 2344void test_stackshot_cpu_info(void *ssbuf, size_t sslen, int exp_cpus, NSArray *exp_cluster_types) { 2345 kcdata_iter_t iter = kcdata_iter(ssbuf, sslen); 2346 bool seen = false; 2347 int singlethread_override = 0; 2348 size_t singlethread_override_sz = sizeof(singlethread_override); 2349 T_QUIET; T_ASSERT_POSIX_SUCCESS( 2350 sysctlbyname("kern.stackshot_single_thread", &singlethread_override, &singlethread_override_sz, NULL, 0), 2351 "get kern.stackshot_single_thread"); 2352 if (singlethread_override) { 2353 T_LOG("skipping cpu count/type check due to single-thread override (kern.stackshot_single_thread=1)"); 2354 return; 2355 } 2356 2357 KCDATA_ITER_FOREACH(iter) { 2358 if ((kcdata_iter_type(iter) != KCDATA_TYPE_ARRAY) || (kcdata_iter_array_elem_type(iter) != STACKSHOT_KCTYPE_LATENCY_INFO_CPU)) { 2359 continue; 2360 } 2361 2362 seen = true; 2363 2364 /* Check ncpus */ 2365 int ncpus = kcdata_iter_array_elem_count(iter); 2366 if (exp_cpus != -1) { 2367 T_QUIET; T_ASSERT_EQ(exp_cpus, ncpus, "Expected number of CPUs matches number of CPUs used for stackshot"); 2368 } 2369 2370 if (exp_cluster_types == nil) { 2371 continue; 2372 } 2373 2374 /* Check cluster types */ 2375 struct stackshot_latency_cpu *latencies = (struct stackshot_latency_cpu *) kcdata_iter_payload(iter); 2376 for (int i = 0; i < ncpus; i++) { 2377 NSNumber *cluster_type = [NSNumber numberWithInt:latencies[i].cluster_type]; 2378 T_QUIET; T_ASSERT_TRUE([exp_cluster_types containsObject:cluster_type], "Type of CPU cluster in expected CPU cluster types"); 2379 } 2380 } 2381 2382 T_QUIET; T_ASSERT_TRUE(seen || !is_development_kernel(), "Seen CPU latency info or is release kernel"); 2383} 2384 2385void test_stackshot_with_clpcctrl(char *const name, char *const argv[], int exp_cpus, NSArray *exp_cluster_types) { 2386 T_LOG("Stackshot CLPC scenario %s", name); 2387 run_clpcctrl(argv); 2388 struct scenario scenario = { 2389 .name = name, 2390 .flags = (STACKSHOT_KCDATA_FORMAT | STACKSHOT_SAVE_LOADINFO | 2391 STACKSHOT_THREAD_WAITINFO | STACKSHOT_GET_GLOBAL_MEM_STATS) 2392 }; 2393 take_stackshot(&scenario, false, ^(void *ssbuf, size_t sslen) { 2394 parse_stackshot(0, ssbuf, sslen, nil); 2395 test_stackshot_cpu_info(ssbuf, sslen, exp_cpus, exp_cluster_types); 2396 }); 2397} 2398 2399T_DECL(core_masks, 2400 "test that stackshot works under various core masks on ARM systems", 2401 T_META_REQUIRES_SYSCTL_EQ("hw.optional.arm64", 1), 2402 T_META_REQUIRES_SYSCTL_NE("kern.kasan.available", 1), /* rdar://115577993 */ 2403 XNU_T_META_REQUIRES_DEVELOPMENT_KERNEL, 2404 T_META_REQUIRE_NOT_VIRTUALIZED, 2405 T_META_RUN_CONCURRENTLY(false), 2406 T_META_TAG_VM_NOT_ELIGIBLE, 2407 T_META_ENABLED(!TARGET_OS_VISION)) // disable for visionOS: device may not be stable with many cores masked off (127904530) 2408{ 2409 /* 2410 * Make sure we're not in a release kernel 2411 * (cannot check with T_META; only one sysctl T_META at a time will work) 2412 */ 2413 if (!is_development_kernel()) { 2414 T_SKIP("test was not run because kernel is release; cannot set core masks"); 2415 return; 2416 } 2417 2418 /* 2419 * rdar://115577993 - CLPC compiles as release in KASAN-variant builds, 2420 * preventing clpcctrl from working. For now, skip this. (Cannot check 2421 * with T_META; only one sysctl T_META at a time will work) 2422 */ 2423 int kasan_avail = 0; 2424 size_t kasan_avail_sz = sizeof(kasan_avail); 2425 sysctlbyname("kern.kasan.available", &kasan_avail, &kasan_avail_sz, NULL, 0); 2426 if (kasan_avail) { 2427 T_SKIP("test was not run because kernel is KASAN; cannot set core masks (see rdar://115577993)"); 2428 return; 2429 } 2430 2431 2432 T_ATEND(restore_clpcctrl); 2433 2434 /* Test with 1 and 2 CPUs for basic functionality */ 2435 test_stackshot_with_clpcctrl( 2436 "core_masks_1cpu", (char *const[]) {clpcctrl_path, "-c", "1", NULL}, 2437 1, nil); 2438 2439 test_stackshot_with_clpcctrl( 2440 "core_masks_2cpus", (char *const[]) {clpcctrl_path, "-c", "2", NULL}, 2441 2, nil); 2442 2443 /* Check nperflevels to see if we're on an AMP system */ 2444 int nperflevels = 1; 2445 size_t nperflevels_sz = sizeof(int); 2446 T_ASSERT_POSIX_SUCCESS( 2447 sysctlbyname("hw.nperflevels", &nperflevels, &nperflevels_sz, NULL, 0), 2448 "get hw.nperflevels"); 2449 if (nperflevels == 1) { 2450 T_LOG("On SMP system, skipping stackshot core_masks AMP tests"); 2451 return; 2452 } 2453 2454 T_QUIET; T_ASSERT_EQ(nperflevels, 2, "nperflevels is 1 or 2"); 2455 T_LOG("On AMP system, performing stackshot core_masks AMP tests"); 2456 2457 /* Perform AMP tests with different cluster types active */ 2458 test_stackshot_with_clpcctrl( 2459 "core_masks_amp_allcpus", 2460 (char *const[]) {clpcctrl_path, "-C", "all", NULL}, 2461 -1, @[@CLUSTER_TYPE_E, @CLUSTER_TYPE_P]); 2462 2463 test_stackshot_with_clpcctrl( 2464 "core_masks_amp_ecpus", 2465 (char *const[]) {clpcctrl_path, "-C", "e", NULL}, 2466 -1, @[@CLUSTER_TYPE_E]); 2467 2468 test_stackshot_with_clpcctrl( 2469 "core_masks_amp_pcpus", 2470 (char *const[]) {clpcctrl_path, "-C", "p", NULL}, 2471 -1, @[@CLUSTER_TYPE_P]); 2472} 2473 2474#pragma mark performance tests 2475 2476#define SHOULD_REUSE_SIZE_HINT 0x01 2477#define SHOULD_USE_DELTA 0x02 2478#define SHOULD_TARGET_SELF 0x04 2479 2480static void 2481stackshot_perf(unsigned int options) 2482{ 2483 struct scenario scenario = { 2484 .flags = (STACKSHOT_SAVE_LOADINFO | STACKSHOT_GET_GLOBAL_MEM_STATS 2485 | STACKSHOT_SAVE_IMP_DONATION_PIDS | STACKSHOT_KCDATA_FORMAT), 2486 }; 2487 2488 dt_stat_t size = dt_stat_create("bytes", "size"); 2489 dt_stat_time_t duration = dt_stat_time_create("duration"); 2490 scenario.timer = duration; 2491 2492 if (options & SHOULD_TARGET_SELF) { 2493 scenario.target_pid = getpid(); 2494 } 2495 2496 while (!dt_stat_stable(duration) || !dt_stat_stable(size)) { 2497 __block uint64_t last_time = 0; 2498 __block uint32_t size_hint = 0; 2499 take_stackshot(&scenario, false, ^(void *ssbuf, size_t sslen) { 2500 dt_stat_add(size, (double)sslen); 2501 last_time = stackshot_timestamp(ssbuf, sslen); 2502 size_hint = (uint32_t)sslen; 2503 }); 2504 if (options & SHOULD_USE_DELTA) { 2505 scenario.since_timestamp = last_time; 2506 scenario.flags |= STACKSHOT_COLLECT_DELTA_SNAPSHOT; 2507 } 2508 if (options & SHOULD_REUSE_SIZE_HINT) { 2509 scenario.size_hint = size_hint; 2510 } 2511 } 2512 2513 dt_stat_finalize(duration); 2514 dt_stat_finalize(size); 2515} 2516 2517static void 2518stackshot_flag_perf_noclobber(uint64_t flag, char *flagname) 2519{ 2520 struct scenario scenario = { 2521 .quiet = true, 2522 .flags = (flag | STACKSHOT_KCDATA_FORMAT), 2523 }; 2524 2525 dt_stat_t duration = dt_stat_create("nanoseconds per thread", "%s_duration", flagname); 2526 dt_stat_t size = dt_stat_create("bytes per thread", "%s_size", flagname); 2527 T_LOG("Testing \"%s\" = 0x%" PRIx64, flagname, flag); 2528 2529 while (!dt_stat_stable(duration) || !dt_stat_stable(size)) { 2530 take_stackshot(&scenario, false, ^(void *ssbuf, size_t sslen) { 2531 kcdata_iter_t iter = kcdata_iter(ssbuf, sslen); 2532 unsigned long no_threads = 0; 2533 mach_timebase_info_data_t timebase = {0, 0}; 2534 uint64_t stackshot_duration = 0; 2535 int found = 0; 2536 T_QUIET; T_ASSERT_EQ(kcdata_iter_type(iter), KCDATA_BUFFER_BEGIN_STACKSHOT, "stackshot buffer"); 2537 2538 KCDATA_ITER_FOREACH(iter) { 2539 switch(kcdata_iter_type(iter)) { 2540 case STACKSHOT_KCTYPE_THREAD_SNAPSHOT: { 2541 found |= 1; 2542 no_threads ++; 2543 break; 2544 } 2545 case STACKSHOT_KCTYPE_STACKSHOT_DURATION: { 2546 struct stackshot_duration *ssd = kcdata_iter_payload(iter); 2547 stackshot_duration = ssd->stackshot_duration; 2548 found |= 2; 2549 break; 2550 } 2551 case KCDATA_TYPE_TIMEBASE: { 2552 found |= 4; 2553 mach_timebase_info_data_t *tb = kcdata_iter_payload(iter); 2554 memcpy(&timebase, tb, sizeof(timebase)); 2555 break; 2556 } 2557 } 2558 } 2559 2560 T_QUIET; T_ASSERT_EQ(found, 0x7, "found everything needed"); 2561 2562 uint64_t ns = (stackshot_duration * timebase.numer) / timebase.denom; 2563 uint64_t per_thread_ns = ns / no_threads; 2564 uint64_t per_thread_size = sslen / no_threads; 2565 2566 dt_stat_add(duration, per_thread_ns); 2567 dt_stat_add(size, per_thread_size); 2568 }); 2569 } 2570 2571 dt_stat_finalize(duration); 2572 dt_stat_finalize(size); 2573} 2574 2575static void 2576stackshot_flag_perf(uint64_t flag, char *flagname) 2577{ 2578 /* 2579 * STACKSHOT_NO_IO_STATS disables data collection, so set it for 2580 * more accurate perfdata collection. 2581 */ 2582 flag |= STACKSHOT_NO_IO_STATS; 2583 2584 stackshot_flag_perf_noclobber(flag, flagname); 2585} 2586 2587 2588T_DECL(flag_perf, "test stackshot performance with different flags set", T_META_TAG_PERF, T_META_TAG_VM_NOT_ELIGIBLE) 2589{ 2590 stackshot_flag_perf_noclobber(STACKSHOT_NO_IO_STATS, "baseline"); 2591 stackshot_flag_perf_noclobber(0, "io_stats"); 2592 2593 stackshot_flag_perf(STACKSHOT_THREAD_WAITINFO, "thread_waitinfo"); 2594 stackshot_flag_perf(STACKSHOT_GET_DQ, "get_dq"); 2595 stackshot_flag_perf(STACKSHOT_SAVE_LOADINFO, "save_loadinfo"); 2596 stackshot_flag_perf(STACKSHOT_GET_GLOBAL_MEM_STATS, "get_global_mem_stats"); 2597 stackshot_flag_perf(STACKSHOT_SAVE_KEXT_LOADINFO, "save_kext_loadinfo"); 2598 stackshot_flag_perf(STACKSHOT_SAVE_IMP_DONATION_PIDS, "save_imp_donation_pids"); 2599 stackshot_flag_perf(STACKSHOT_ENABLE_BT_FAULTING, "enable_bt_faulting"); 2600 stackshot_flag_perf(STACKSHOT_COLLECT_SHAREDCACHE_LAYOUT, "collect_sharedcache_layout"); 2601 stackshot_flag_perf(STACKSHOT_ENABLE_UUID_FAULTING, "enable_uuid_faulting"); 2602 stackshot_flag_perf(STACKSHOT_THREAD_GROUP, "thread_group"); 2603 stackshot_flag_perf(STACKSHOT_SAVE_JETSAM_COALITIONS, "save_jetsam_coalitions"); 2604 stackshot_flag_perf(STACKSHOT_INSTRS_CYCLES, "instrs_cycles"); 2605 stackshot_flag_perf(STACKSHOT_ASID, "asid"); 2606 stackshot_flag_perf(STACKSHOT_EXCLAVES, "all_exclaves"); 2607 stackshot_flag_perf(STACKSHOT_EXCLAVES | STACKSHOT_ASID, "all_exclaves_and_asid"); 2608 stackshot_flag_perf(STACKSHOT_SKIP_EXCLAVES, "skip_exclaves"); 2609} 2610 2611T_DECL(perf_no_size_hint, "test stackshot performance with no size hint", 2612 T_META_TAG_PERF, T_META_TAG_VM_NOT_ELIGIBLE) 2613{ 2614 stackshot_perf(0); 2615} 2616 2617T_DECL(perf_size_hint, "test stackshot performance with size hint", 2618 T_META_TAG_PERF, T_META_TAG_VM_NOT_ELIGIBLE) 2619{ 2620 stackshot_perf(SHOULD_REUSE_SIZE_HINT); 2621} 2622 2623T_DECL(perf_process, "test stackshot performance targeted at process", 2624 T_META_TAG_PERF, T_META_TAG_VM_NOT_ELIGIBLE) 2625{ 2626 stackshot_perf(SHOULD_REUSE_SIZE_HINT | SHOULD_TARGET_SELF); 2627} 2628 2629T_DECL(perf_delta, "test delta stackshot performance", 2630 T_META_TAG_PERF, T_META_TAG_VM_NOT_ELIGIBLE) 2631{ 2632 stackshot_perf(SHOULD_REUSE_SIZE_HINT | SHOULD_USE_DELTA); 2633} 2634 2635T_DECL(perf_delta_no_exclaves, "test delta stackshot performance without Exclaves", 2636 T_META_REQUIRES_SYSCTL_EQ("kern.exclaves_status", 1), 2637 T_META_REQUIRES_SYSCTL_EQ("kern.exclaves_inspection_status", 1), 2638 T_META_TAG_PERF, T_META_TAG_VM_NOT_ELIGIBLE) 2639{ 2640 stackshot_perf(SHOULD_REUSE_SIZE_HINT | SHOULD_USE_DELTA | STACKSHOT_SKIP_EXCLAVES); 2641} 2642 2643T_DECL(perf_delta_process, "test delta stackshot performance targeted at a process", 2644 T_META_TAG_PERF, T_META_TAG_VM_NOT_ELIGIBLE) 2645{ 2646 stackshot_perf(SHOULD_REUSE_SIZE_HINT | SHOULD_USE_DELTA | SHOULD_TARGET_SELF); 2647} 2648 2649T_DECL(stackshot_entitlement_report_test, "test stackshot entitlement report", T_META_TAG_VM_PREFERRED) 2650{ 2651 int sysctlValue = 1; 2652 T_ASSERT_POSIX_SUCCESS( 2653 sysctlbyname("debug.stackshot_entitlement_send_batch", NULL, NULL, &sysctlValue, sizeof(sysctlValue)), 2654 "set debug.stackshot_entitlement_send_batch=1"); 2655 // having a way to verify that the coreanalytics event was received would be even better 2656 // See rdar://74197197 2657 T_PASS("entitlement test ran"); 2658} 2659 2660static void 2661expect_os_build_version_in_stackshot(void *ssbuf, size_t sslen) 2662{ 2663 kcdata_iter_t iter = kcdata_iter(ssbuf, sslen); 2664 2665 bool saw_os_build_version = false; 2666 iter = kcdata_iter_next(iter); 2667 2668 KCDATA_ITER_FOREACH(iter) { 2669 switch (kcdata_iter_type(iter)) { 2670 case STACKSHOT_KCTYPE_OS_BUILD_VERSION: 2671 saw_os_build_version = true; 2672 T_LOG("Found os build version in stackshot: %s", kcdata_iter_payload(iter)); 2673 return; 2674 2675 default: 2676 break; 2677 } 2678 } 2679 2680 T_ASSERT_FAIL("didn't see os build version in stackshot"); 2681} 2682 2683T_DECL(os_build_version, "test stackshot contains os build version", T_META_TAG_VM_PREFERRED) 2684{ 2685 2686 struct scenario scenario = { 2687 .name = "os-build-version", 2688 .flags = (STACKSHOT_SAVE_LOADINFO | STACKSHOT_KCDATA_FORMAT), 2689 }; 2690 2691 T_LOG("attempting to take stackshot with an os build version"); 2692 take_stackshot(&scenario, false, ^(void *ssbuf, size_t sslen) { 2693 expect_os_build_version_in_stackshot(ssbuf, sslen); 2694 }); 2695} 2696 2697static uint64_t 2698stackshot_timestamp(void *ssbuf, size_t sslen) 2699{ 2700 kcdata_iter_t iter = kcdata_iter(ssbuf, sslen); 2701 2702 uint32_t type = kcdata_iter_type(iter); 2703 if (type != KCDATA_BUFFER_BEGIN_STACKSHOT && type != KCDATA_BUFFER_BEGIN_DELTA_STACKSHOT) { 2704 T_ASSERT_FAIL("invalid kcdata type %u", kcdata_iter_type(iter)); 2705 } 2706 2707 iter = kcdata_iter_find_type(iter, KCDATA_TYPE_MACH_ABSOLUTE_TIME); 2708 T_QUIET; 2709 T_ASSERT_TRUE(kcdata_iter_valid(iter), "timestamp found in stackshot"); 2710 2711 return *(uint64_t *)kcdata_iter_payload(iter); 2712} 2713 2714#define TEST_THREAD_NAME "stackshot_test_thread" 2715 2716static void 2717parse_thread_group_stackshot(void **ssbuf, size_t sslen) 2718{ 2719 bool seen_thread_group_snapshot = false; 2720 kcdata_iter_t iter = kcdata_iter(ssbuf, sslen); 2721 T_ASSERT_EQ(kcdata_iter_type(iter), KCDATA_BUFFER_BEGIN_STACKSHOT, 2722 "buffer provided is a stackshot"); 2723 2724 NSMutableSet *thread_groups = [[NSMutableSet alloc] init]; 2725 2726 iter = kcdata_iter_next(iter); 2727 KCDATA_ITER_FOREACH(iter) { 2728 switch (kcdata_iter_type(iter)) { 2729 case KCDATA_TYPE_ARRAY: { 2730 T_QUIET; 2731 T_ASSERT_TRUE(kcdata_iter_array_valid(iter), 2732 "checked that array is valid"); 2733 2734 if (kcdata_iter_array_elem_type(iter) != STACKSHOT_KCTYPE_THREAD_GROUP_SNAPSHOT) { 2735 continue; 2736 } 2737 2738 seen_thread_group_snapshot = true; 2739 2740 if (kcdata_iter_array_elem_size(iter) >= sizeof(struct thread_group_snapshot_v3)) { 2741 struct thread_group_snapshot_v3 *tgs_array = kcdata_iter_payload(iter); 2742 for (uint32_t j = 0; j < kcdata_iter_array_elem_count(iter); j++) { 2743 struct thread_group_snapshot_v3 *tgs = tgs_array + j; 2744 [thread_groups addObject:@(tgs->tgs_id)]; 2745 } 2746 } 2747 else { 2748 struct thread_group_snapshot *tgs_array = kcdata_iter_payload(iter); 2749 for (uint32_t j = 0; j < kcdata_iter_array_elem_count(iter); j++) { 2750 struct thread_group_snapshot *tgs = tgs_array + j; 2751 [thread_groups addObject:@(tgs->tgs_id)]; 2752 } 2753 } 2754 break; 2755 } 2756 } 2757 } 2758 KCDATA_ITER_FOREACH(iter) { 2759 NSError *error = nil; 2760 2761 switch (kcdata_iter_type(iter)) { 2762 2763 case KCDATA_TYPE_CONTAINER_BEGIN: { 2764 T_QUIET; 2765 T_ASSERT_TRUE(kcdata_iter_container_valid(iter), 2766 "checked that container is valid"); 2767 2768 if (kcdata_iter_container_type(iter) != STACKSHOT_KCCONTAINER_THREAD) { 2769 break; 2770 } 2771 2772 NSDictionary *container = parseKCDataContainer(&iter, &error); 2773 T_QUIET; T_ASSERT_NOTNULL(container, "parsed thread container from stackshot"); 2774 T_QUIET; T_ASSERT_NULL(error, "error unset after parsing container"); 2775 2776 int tg = [container[@"thread_snapshots"][@"thread_group"] intValue]; 2777 2778 T_ASSERT_TRUE([thread_groups containsObject:@(tg)], "check that the thread group the thread is in exists"); 2779 2780 break; 2781 }; 2782 2783 } 2784 } 2785 T_ASSERT_TRUE(seen_thread_group_snapshot, "check that we have seen a thread group snapshot"); 2786} 2787 2788static void 2789verify_stackshot_sharedcache_layout(struct dyld_uuid_info_64 *uuids, uint32_t uuid_count) 2790{ 2791 uuid_t cur_shared_cache_uuid; 2792 __block uint32_t lib_index = 0, libs_found = 0; 2793 2794 _dyld_get_shared_cache_uuid(cur_shared_cache_uuid); 2795 int result = dyld_shared_cache_iterate_text(cur_shared_cache_uuid, ^(const dyld_shared_cache_dylib_text_info* info) { 2796 T_QUIET; T_ASSERT_LT(lib_index, uuid_count, "dyld_shared_cache_iterate_text exceeded number of libraries returned by kernel"); 2797 2798 libs_found++; 2799 struct dyld_uuid_info_64 *cur_stackshot_uuid_entry = &uuids[lib_index]; 2800 T_QUIET; T_ASSERT_EQ(memcmp(info->dylibUuid, cur_stackshot_uuid_entry->imageUUID, sizeof(info->dylibUuid)), 0, 2801 "dyld returned UUID doesn't match kernel returned UUID"); 2802 T_QUIET; T_ASSERT_EQ(info->loadAddressUnslid, cur_stackshot_uuid_entry->imageLoadAddress, 2803 "dyld returned load address doesn't match kernel returned load address"); 2804 lib_index++; 2805 }); 2806 2807 T_ASSERT_EQ(result, 0, "iterate shared cache layout"); 2808 T_ASSERT_EQ(libs_found, uuid_count, "dyld iterator returned same number of libraries as kernel"); 2809 2810 T_LOG("verified %d libraries from dyld shared cache", libs_found); 2811} 2812 2813static void 2814check_shared_cache_uuid(uuid_t imageUUID) 2815{ 2816 static uuid_t shared_cache_uuid; 2817 static dispatch_once_t read_shared_cache_uuid; 2818 2819 dispatch_once(&read_shared_cache_uuid, ^{ 2820 T_QUIET; 2821 T_ASSERT_TRUE(_dyld_get_shared_cache_uuid(shared_cache_uuid), "retrieve current shared cache UUID"); 2822 }); 2823 T_QUIET; T_ASSERT_EQ(uuid_compare(shared_cache_uuid, imageUUID), 0, 2824 "dyld returned UUID doesn't match kernel returned UUID for system shared cache"); 2825} 2826 2827/* 2828 * extra dictionary contains data relevant for the given flags: 2829 * PARSE_STACKSHOT_ZOMBIE: zombie_child_pid_key -> @(pid) 2830 * PARSE_STACKSHOT_POSTEXEC: postexec_child_unique_pid_key -> @(unique_pid) 2831 */ 2832static void 2833parse_stackshot(uint64_t stackshot_parsing_flags, void *ssbuf, size_t sslen, NSDictionary *extra) 2834{ 2835 bool delta = (stackshot_parsing_flags & PARSE_STACKSHOT_DELTA); 2836 bool expect_sharedcache_child = (stackshot_parsing_flags & PARSE_STACKSHOT_SHAREDCACHE_FLAGS); 2837 bool expect_zombie_child = (stackshot_parsing_flags & PARSE_STACKSHOT_ZOMBIE); 2838 bool expect_postexec_child = (stackshot_parsing_flags & PARSE_STACKSHOT_POSTEXEC); 2839 bool expect_cseg_waitinfo = (stackshot_parsing_flags & PARSE_STACKSHOT_WAITINFO_CSEG); 2840 bool expect_translated_child = (stackshot_parsing_flags & PARSE_STACKSHOT_TRANSLATED); 2841 bool expect_shared_cache_layout = false; 2842 bool expect_shared_cache_uuid = !delta; 2843 bool expect_dispatch_queue_label = (stackshot_parsing_flags & PARSE_STACKSHOT_DISPATCH_QUEUE_LABEL); 2844 bool expect_turnstile_lock = (stackshot_parsing_flags & PARSE_STACKSHOT_TURNSTILEINFO); 2845 bool expect_srp_waitinfo = (stackshot_parsing_flags & PARSE_STACKSHOT_WAITINFO_SRP); 2846 bool expect_sp_throttled = (stackshot_parsing_flags & PARSE_STACKSHOT_THROTTLED_SP); 2847 bool expect_exec_inprogress = (stackshot_parsing_flags & PARSE_STACKSHOT_EXEC_INPROGRESS); 2848 bool expect_transitioning_task = (stackshot_parsing_flags & PARSE_STACKSHOT_TRANSITIONING); 2849 bool expect_asyncstack = (stackshot_parsing_flags & PARSE_STACKSHOT_ASYNCSTACK); 2850 bool expect_driverkit = (stackshot_parsing_flags & PARSE_STACKSHOT_DRIVERKIT); 2851 bool expect_suspendinfo = (stackshot_parsing_flags & PARSE_STACKSHOT_SUSPENDINFO); 2852 bool found_zombie_child = false, found_postexec_child = false, found_shared_cache_layout = false, found_shared_cache_uuid = false; 2853 bool found_translated_child = false, found_transitioning_task = false; 2854 bool found_dispatch_queue_label = false, found_turnstile_lock = false; 2855 bool found_cseg_waitinfo = false, found_srp_waitinfo = false; 2856 bool found_sharedcache_child = false, found_sharedcache_badflags = false, found_sharedcache_self = false; 2857 bool found_asyncstack = false; 2858 bool found_throttled_service = false; 2859 bool found_exclaves = false; 2860 bool expect_single_task = (stackshot_parsing_flags & PARSE_STACKSHOT_TARGETPID); 2861 uint64_t srp_expected_threadid = 0; 2862 pid_t zombie_child_pid = -1, srp_expected_pid = -1, sharedcache_child_pid = -1, throttled_service_ctx = -1; 2863 pid_t translated_child_pid = -1, transistioning_task_pid = -1; 2864 bool sharedcache_child_sameaddr = false, is_throttled = false; 2865 uint64_t postexec_child_unique_pid = 0, cseg_expected_threadid = 0; 2866 uint64_t sharedcache_child_flags = 0, sharedcache_self_flags = 0; 2867 uint64_t asyncstack_threadid = 0; 2868 NSArray *asyncstack_stack = nil; 2869 char *inflatedBufferBase = NULL; 2870 pid_t exec_inprogress_pid = -1; 2871 void (^exec_inprogress_cb)(uint64_t, uint64_t) = NULL; 2872 int exec_inprogress_found = 0; 2873 uint64_t exec_inprogress_containerid = 0; 2874 void (^driverkit_cb)(pid_t) = NULL; 2875 NSMutableDictionary *sharedCaches = [NSMutableDictionary new]; 2876 uint64_t expected_num_threads = 0, expected_num_tasks = 0, found_percpu_threads = 0, found_tasks = 0, found_percpu_tasks = 0; 2877 NSMutableSet *seen_tasks = [NSMutableSet new]; 2878 2879 if (expect_shared_cache_uuid) { 2880 uuid_t shared_cache_uuid; 2881 if (!_dyld_get_shared_cache_uuid(shared_cache_uuid)) { 2882 T_LOG("Skipping verifying shared cache UUID in stackshot data because not running with a shared cache"); 2883 expect_shared_cache_uuid = false; 2884 } 2885 } 2886 2887 if (stackshot_parsing_flags & PARSE_STACKSHOT_SHAREDCACHE_LAYOUT) { 2888 size_t shared_cache_length = 0; 2889 const void *cache_header = _dyld_get_shared_cache_range(&shared_cache_length); 2890 T_QUIET; T_ASSERT_NOTNULL(cache_header, "current process running with shared cache"); 2891 T_QUIET; T_ASSERT_GT(shared_cache_length, sizeof(struct _dyld_cache_header), "valid shared cache length populated by _dyld_get_shared_cache_range"); 2892 2893 if (_dyld_shared_cache_is_locally_built()) { 2894 T_LOG("device running with locally built shared cache, expect shared cache layout"); 2895 expect_shared_cache_layout = true; 2896 } else { 2897 T_LOG("device running with B&I built shared-cache, no shared cache layout expected"); 2898 } 2899 } 2900 2901 if (expect_sharedcache_child) { 2902 NSNumber* pid_num = extra[sharedcache_child_pid_key]; 2903 NSNumber* sameaddr_num = extra[sharedcache_child_sameaddr_key]; 2904 T_QUIET; T_ASSERT_NOTNULL(pid_num, "sharedcache child pid provided"); 2905 T_QUIET; T_ASSERT_NOTNULL(sameaddr_num, "sharedcache child addrsame provided"); 2906 sharedcache_child_pid = [pid_num intValue]; 2907 T_QUIET; T_ASSERT_GT(sharedcache_child_pid, 0, "sharedcache child pid greater than zero"); 2908 sharedcache_child_sameaddr = [sameaddr_num intValue]; 2909 T_QUIET; T_ASSERT_GE([sameaddr_num intValue], 0, "sharedcache child sameaddr is boolean (0 or 1)"); 2910 T_QUIET; T_ASSERT_LE([sameaddr_num intValue], 1, "sharedcache child sameaddr is boolean (0 or 1)"); 2911 } 2912 2913 if (expect_transitioning_task) { 2914 NSNumber* pid_num = extra[transitioning_pid_key]; 2915 T_ASSERT_NOTNULL(pid_num, "transitioning task pid provided"); 2916 transistioning_task_pid = [pid_num intValue]; 2917 } 2918 2919 if (expect_zombie_child) { 2920 NSNumber* pid_num = extra[zombie_child_pid_key]; 2921 T_QUIET; T_ASSERT_NOTNULL(pid_num, "zombie child pid provided"); 2922 zombie_child_pid = [pid_num intValue]; 2923 T_QUIET; T_ASSERT_GT(zombie_child_pid, 0, "zombie child pid greater than zero"); 2924 } 2925 2926 if (expect_postexec_child) { 2927 NSNumber* unique_pid_num = extra[postexec_child_unique_pid_key]; 2928 T_QUIET; T_ASSERT_NOTNULL(unique_pid_num, "postexec child unique pid provided"); 2929 postexec_child_unique_pid = [unique_pid_num unsignedLongLongValue]; 2930 T_QUIET; T_ASSERT_GT(postexec_child_unique_pid, 0ull, "postexec child unique pid greater than zero"); 2931 } 2932 2933 if (expect_cseg_waitinfo) { 2934 NSNumber* tid_num = extra[cseg_expected_threadid_key]; 2935 T_QUIET; T_ASSERT_NOTNULL(tid_num, "cseg's expected thread id provided"); 2936 cseg_expected_threadid = tid_num.unsignedLongValue; 2937 T_QUIET; T_ASSERT_GT(cseg_expected_threadid, UINT64_C(0), "compressor segment thread is present"); 2938 } 2939 2940 if (expect_srp_waitinfo) { 2941 NSNumber* threadid_num = extra[srp_expected_threadid_key]; 2942 NSNumber* pid_num = extra[srp_expected_pid_key]; 2943 T_QUIET; T_ASSERT_TRUE(threadid_num != nil || pid_num != nil, "expected SRP threadid or pid"); 2944 if (threadid_num != nil) { 2945 srp_expected_threadid = [threadid_num unsignedLongLongValue]; 2946 T_QUIET; T_ASSERT_GT(srp_expected_threadid, 0ull, "srp_expected_threadid greater than zero"); 2947 } 2948 if (pid_num != nil) { 2949 srp_expected_pid = [pid_num intValue]; 2950 T_QUIET; T_ASSERT_GT(srp_expected_pid, 0, "srp_expected_pid greater than zero"); 2951 } 2952 T_LOG("looking for SRP pid: %d threadid: %llu", srp_expected_pid, srp_expected_threadid); 2953 } 2954 2955 if (expect_sp_throttled) { 2956 NSNumber* ctx = extra[sp_throttled_expected_ctxt_key]; 2957 T_QUIET; T_ASSERT_TRUE(ctx != nil, "expected pid"); 2958 throttled_service_ctx = [ctx intValue]; 2959 T_QUIET; T_ASSERT_GT(throttled_service_ctx, 0, "expected pid greater than zero"); 2960 2961 NSNumber *throttled = extra[sp_throttled_expect_flag]; 2962 T_QUIET; T_ASSERT_TRUE(throttled != nil, "expected flag value"); 2963 is_throttled = ([throttled intValue] != 0); 2964 2965 T_LOG("Looking for service with ctxt: %d, thottled:%d", throttled_service_ctx, is_throttled); 2966 } 2967 2968 if (expect_translated_child) { 2969 NSNumber* pid_num = extra[translated_child_pid_key]; 2970 T_QUIET; T_ASSERT_NOTNULL(pid_num, "translated child pid provided"); 2971 translated_child_pid = [pid_num intValue]; 2972 T_QUIET; T_ASSERT_GT(translated_child_pid, 0, "translated child pid greater than zero"); 2973 } 2974 if (expect_exec_inprogress) { 2975 NSNumber* pid_num = extra[exec_inprogress_pid_key]; 2976 T_QUIET; T_ASSERT_NOTNULL(pid_num, "exec inprogress pid provided"); 2977 exec_inprogress_pid = [pid_num intValue]; 2978 T_QUIET; T_ASSERT_GT(exec_inprogress_pid, 0, "exec inprogress pid greater than zero"); 2979 2980 exec_inprogress_cb = extra[exec_inprogress_found_key]; 2981 T_QUIET; T_ASSERT_NOTNULL(exec_inprogress_cb, "exec inprogress found callback provided"); 2982 } 2983 if (expect_driverkit) { 2984 driverkit_cb = extra[driverkit_found_key]; 2985 T_QUIET; T_ASSERT_NOTNULL(driverkit_cb, "driverkit found callback provided"); 2986 } 2987 2988 if (expect_asyncstack) { 2989 NSNumber* threadid_id = extra[asyncstack_expected_threadid_key]; 2990 T_QUIET; T_ASSERT_NOTNULL(threadid_id, "asyncstack threadid provided"); 2991 asyncstack_threadid = [threadid_id unsignedLongLongValue]; 2992 asyncstack_stack = extra[asyncstack_expected_stack_key]; 2993 T_QUIET; T_ASSERT_NOTNULL(asyncstack_stack, "asyncstack expected stack provided"); 2994 } 2995 2996 kcdata_iter_t iter = kcdata_iter(ssbuf, sslen); 2997 if (delta) { 2998 T_ASSERT_EQ(kcdata_iter_type(iter), KCDATA_BUFFER_BEGIN_DELTA_STACKSHOT, 2999 "buffer provided is a delta stackshot"); 3000 3001 iter = kcdata_iter_next(iter); 3002 } else { 3003 if (kcdata_iter_type(iter) != KCDATA_BUFFER_BEGIN_COMPRESSED) { 3004 T_ASSERT_EQ(kcdata_iter_type(iter), KCDATA_BUFFER_BEGIN_STACKSHOT, 3005 "buffer provided is a stackshot"); 3006 3007 iter = kcdata_iter_next(iter); 3008 } else { 3009 /* we are dealing with a compressed buffer */ 3010 iter = kcdata_iter_next(iter); 3011 uint64_t compression_type = 0, totalout = 0, totalin = 0; 3012 3013 uint64_t *data; 3014 char *desc; 3015 for (int i = 0; i < 3; i ++) { 3016 kcdata_iter_get_data_with_desc(iter, &desc, (void **)&data, NULL); 3017 if (strcmp(desc, "kcd_c_type") == 0) { 3018 compression_type = *data; 3019 } else if (strcmp(desc, "kcd_c_totalout") == 0){ 3020 totalout = *data; 3021 } else if (strcmp(desc, "kcd_c_totalin") == 0){ 3022 totalin = *data; 3023 } 3024 3025 iter = kcdata_iter_next(iter); 3026 } 3027 3028 T_ASSERT_EQ(compression_type, UINT64_C(1), "zlib compression is used"); 3029 T_ASSERT_GT(totalout, UINT64_C(0), "successfully gathered how long the compressed buffer is"); 3030 T_ASSERT_GT(totalin, UINT64_C(0), "successfully gathered how long the uncompressed buffer will be at least"); 3031 3032 /* progress to the next kcdata item */ 3033 T_ASSERT_EQ(kcdata_iter_type(iter), KCDATA_BUFFER_BEGIN_STACKSHOT, "compressed stackshot found"); 3034 3035 char *bufferBase = kcdata_iter_payload(iter); 3036 3037 /* 3038 * zlib is used, allocate a buffer based on the metadata, plus 3039 * extra scratch space (+12.5%) in case totalin was inconsistent 3040 */ 3041 size_t inflatedBufferSize = totalin + (totalin >> 3); 3042 inflatedBufferBase = malloc(inflatedBufferSize); 3043 T_QUIET; T_WITH_ERRNO; T_ASSERT_NOTNULL(inflatedBufferBase, "allocated temporary output buffer"); 3044 3045 z_stream zs; 3046 memset(&zs, 0, sizeof(zs)); 3047 T_QUIET; T_ASSERT_EQ(inflateInit(&zs), Z_OK, "inflateInit OK"); 3048 zs.next_in = (unsigned char *)bufferBase; 3049 T_QUIET; T_ASSERT_LE(totalout, (uint64_t)UINT_MAX, "stackshot is not too large"); 3050 zs.avail_in = (uInt)totalout; 3051 zs.next_out = (unsigned char *)inflatedBufferBase; 3052 T_QUIET; T_ASSERT_LE(inflatedBufferSize, (size_t)UINT_MAX, "output region is not too large"); 3053 zs.avail_out = (uInt)inflatedBufferSize; 3054 T_ASSERT_EQ(inflate(&zs, Z_FINISH), Z_STREAM_END, "inflated buffer"); 3055 inflateEnd(&zs); 3056 3057 T_ASSERT_EQ((uint64_t)zs.total_out, totalin, "expected number of bytes inflated"); 3058 3059 /* copy the data after the compressed area */ 3060 T_QUIET; T_ASSERT_GE((void *)bufferBase, ssbuf, 3061 "base of compressed stackshot is after the returned stackshot buffer"); 3062 size_t header_size = (size_t)(bufferBase - (char *)ssbuf); 3063 size_t data_after_compressed_size = sslen - totalout - header_size; 3064 T_QUIET; T_ASSERT_LE(data_after_compressed_size, 3065 inflatedBufferSize - zs.total_out, 3066 "footer fits in the buffer"); 3067 memcpy(inflatedBufferBase + zs.total_out, 3068 bufferBase + totalout, 3069 data_after_compressed_size); 3070 3071 iter = kcdata_iter(inflatedBufferBase, inflatedBufferSize); 3072 } 3073 } 3074 3075 KCDATA_ITER_FOREACH(iter) { 3076 NSError *error = nil; 3077 3078 switch (kcdata_iter_type(iter)) { 3079 case KCDATA_TYPE_ARRAY: { 3080 T_QUIET; 3081 T_ASSERT_TRUE(kcdata_iter_array_valid(iter), 3082 "checked that array is valid"); 3083 3084 NSMutableDictionary *array = parseKCDataArray(iter, &error); 3085 T_QUIET; T_ASSERT_NOTNULL(array, "parsed array from stackshot"); 3086 T_QUIET; T_ASSERT_NULL(error, "error unset after parsing array"); 3087 3088 if (kcdata_iter_array_elem_type(iter) == STACKSHOT_KCTYPE_SYS_SHAREDCACHE_LAYOUT) { 3089 struct dyld_uuid_info_64 *shared_cache_uuids = kcdata_iter_payload(iter); 3090 uint32_t uuid_count = kcdata_iter_array_elem_count(iter); 3091 T_ASSERT_NOTNULL(shared_cache_uuids, "parsed shared cache layout array"); 3092 T_ASSERT_GT(uuid_count, 0, "returned valid number of UUIDs from shared cache"); 3093 verify_stackshot_sharedcache_layout(shared_cache_uuids, uuid_count); 3094 found_shared_cache_layout = true; 3095 } 3096 3097 break; 3098 } 3099 case KCDATA_TYPE_CONTAINER_BEGIN: { 3100 T_QUIET; 3101 T_ASSERT_TRUE(kcdata_iter_container_valid(iter), 3102 "checked that container is valid"); 3103 3104 uint64_t containerid = kcdata_iter_container_id(iter); 3105 uint32_t container_type = kcdata_iter_container_type(iter); 3106 3107 if (container_type == STACKSHOT_KCCONTAINER_SHAREDCACHE) { 3108 NSDictionary *container = parseKCDataContainer(&iter, &error); 3109 T_QUIET; T_ASSERT_NOTNULL(container, "parsed sharedcache container from stackshot"); 3110 T_QUIET; T_ASSERT_NULL(error, "error unset after parsing sharedcache container"); 3111 T_QUIET; T_EXPECT_EQ(sharedCaches[@(containerid)], nil, "sharedcache containerid %lld should be unique", containerid); 3112 sharedCaches[@(containerid)] = container; 3113 break; 3114 } 3115 3116 if (container_type == STACKSHOT_KCCONTAINER_EXCLAVES) { 3117 found_exclaves = true; 3118 break; 3119 } 3120 3121 /* 3122 * treat containers other than tasks/transitioning_tasks 3123 * as expanded in-line. 3124 */ 3125 if (container_type != STACKSHOT_KCCONTAINER_TASK && 3126 container_type != STACKSHOT_KCCONTAINER_TRANSITIONING_TASK) { 3127 T_LOG("container skipped: %d", container_type); 3128 break; 3129 } 3130 NSDictionary *container = parseKCDataContainer(&iter, &error); 3131 T_QUIET; T_ASSERT_NOTNULL(container, "parsed task/transitioning_task container from stackshot"); 3132 T_QUIET; T_ASSERT_NULL(error, "error unset after parsing container"); 3133 3134 found_tasks++; 3135 3136 NSDictionary* task_snapshot = container[@"task_snapshots"][@"task_snapshot"]; 3137 NSDictionary* task_delta_snapshot = container[@"task_snapshots"][@"task_delta_snapshot"]; 3138 NSDictionary* transitioning_task_snapshot = container[@"transitioning_task_snapshots"][@"transitioning_task_snapshot"]; 3139 3140 NSNumber *task_pid = NULL; 3141 if (task_snapshot) { 3142 task_pid = task_snapshot[@"ts_unique_pid"]; 3143 } else if(task_delta_snapshot) { 3144 task_pid = task_snapshot[@"tds_unique_pid"]; 3145 } else if(transitioning_task_snapshot) { 3146 task_pid = transitioning_task_snapshot[@"tts_pid"]; 3147 } 3148 3149 if (task_pid && [seen_tasks containsObject:task_pid]) { 3150 T_QUIET; T_ASSERT_FALSE([seen_tasks containsObject:task_pid], "No duplicate PIDs in stackshot"); 3151 [seen_tasks addObject:task_pid]; 3152 } 3153 3154 /* 3155 * Having processed the container, we now only check it 3156 * if it's the correct type. 3157 */ 3158 if ((!expect_transitioning_task && (container_type != STACKSHOT_KCCONTAINER_TASK)) || 3159 (expect_transitioning_task && (container_type != STACKSHOT_KCCONTAINER_TRANSITIONING_TASK))) { 3160 break; 3161 } 3162 if (!expect_transitioning_task) { 3163 T_QUIET; T_ASSERT_TRUE(!!task_snapshot != !!task_delta_snapshot, "Either task_snapshot xor task_delta_snapshot provided"); 3164 } 3165 3166 if (expect_dispatch_queue_label && !found_dispatch_queue_label) { 3167 for (id thread_key in container[@"task_snapshots"][@"thread_snapshots"]) { 3168 NSMutableDictionary *thread = container[@"task_snapshots"][@"thread_snapshots"][thread_key]; 3169 NSString *dql = thread[@"dispatch_queue_label"]; 3170 3171 if ([dql isEqualToString:@TEST_STACKSHOT_QUEUE_LABEL]) { 3172 found_dispatch_queue_label = true; 3173 break; 3174 } 3175 } 3176 } 3177 3178 if (expect_transitioning_task && !found_transitioning_task) { 3179 if (transitioning_task_snapshot) { 3180 uint64_t the_pid = [transitioning_task_snapshot[@"tts_pid"] unsignedLongLongValue]; 3181 if (the_pid == (uint64_t)transistioning_task_pid) { 3182 found_transitioning_task = true; 3183 3184 T_PASS("FOUND Transitioning task %llu has a transitioning task snapshot", (uint64_t) transistioning_task_pid); 3185 break; 3186 } 3187 } 3188 } 3189 3190 if (expect_postexec_child && !found_postexec_child) { 3191 if (task_snapshot) { 3192 uint64_t unique_pid = [task_snapshot[@"ts_unique_pid"] unsignedLongLongValue]; 3193 if (unique_pid == postexec_child_unique_pid) { 3194 found_postexec_child = true; 3195 3196 T_PASS("post-exec child %llu has a task snapshot", postexec_child_unique_pid); 3197 3198 break; 3199 } 3200 } 3201 3202 if (task_delta_snapshot) { 3203 uint64_t unique_pid = [task_delta_snapshot[@"tds_unique_pid"] unsignedLongLongValue]; 3204 if (unique_pid == postexec_child_unique_pid) { 3205 found_postexec_child = true; 3206 3207 T_FAIL("post-exec child %llu shouldn't have a delta task snapshot", postexec_child_unique_pid); 3208 3209 break; 3210 } 3211 } 3212 } 3213 3214 int pid = [task_snapshot[@"ts_pid"] intValue]; 3215 3216 if (pid && expect_shared_cache_uuid && !found_shared_cache_uuid) { 3217 id ptr = container[@"task_snapshots"][@"shared_cache_dyld_load_info"]; 3218 if (ptr) { 3219 id uuid = ptr[@"imageUUID"]; 3220 3221 uint8_t uuid_p[16]; 3222 for (unsigned int i = 0; i < 16; i ++) { 3223 NSNumber *uuidByte = uuid[i]; 3224 uuid_p[i] = (uint8_t)uuidByte.charValue; 3225 } 3226 3227 check_shared_cache_uuid(uuid_p); 3228 3229 uint64_t baseAddress = (uint64_t)((NSNumber *)ptr[@"imageSlidBaseAddress"]).longLongValue; 3230 uint64_t firstMapping = (uint64_t)((NSNumber *)ptr[@"sharedCacheSlidFirstMapping"]).longLongValue; 3231 3232 T_EXPECT_LE(baseAddress, firstMapping, 3233 "in per-task shared_cache_dyld_load_info, " 3234 "baseAddress <= firstMapping"); 3235 T_EXPECT_GE(baseAddress + (7ull << 32) + (1ull << 29), 3236 firstMapping, 3237 "in per-task shared_cache_dyld_load_info, " 3238 "baseAddress + 28.5gig >= firstMapping"); 3239 3240 size_t shared_cache_len; 3241 const void *addr = _dyld_get_shared_cache_range(&shared_cache_len); 3242 T_EXPECT_EQ((uint64_t)addr, firstMapping, 3243 "SlidFirstMapping should match shared_cache_range"); 3244 3245 /* 3246 * check_shared_cache_uuid() will assert on failure, so if 3247 * we get here, then we have found the shared cache UUID 3248 * and it's correct 3249 */ 3250 found_shared_cache_uuid = true; 3251 } 3252 } 3253 3254 if (expect_sharedcache_child) { 3255 uint64_t task_flags = [task_snapshot[@"ts_ss_flags"] unsignedLongLongValue]; 3256 uint64_t sharedregion_flags = (task_flags & (kTaskSharedRegionNone | kTaskSharedRegionSystem | kTaskSharedRegionOther)); 3257 id sharedregion_info = container[@"task_snapshots"][@"shared_cache_dyld_load_info"]; 3258 id sharedcache_id = container[@"task_snapshots"][@"sharedCacheID"]; 3259 if (!found_sharedcache_badflags) { 3260 T_QUIET; T_EXPECT_NE(sharedregion_flags, 0ll, "one of the kTaskSharedRegion flags should be set on all tasks"); 3261 bool multiple = (sharedregion_flags & (sharedregion_flags - 1)) != 0; 3262 T_QUIET; T_EXPECT_FALSE(multiple, "only one kTaskSharedRegion flag should be set on each task"); 3263 found_sharedcache_badflags = (sharedregion_flags == 0 || multiple); 3264 } 3265 if (pid == 0) { 3266 T_ASSERT_EQ(sharedregion_flags, (uint64_t)kTaskSharedRegionNone, "Kernel proc (pid 0) should have no shared region"); 3267 } else if (pid == sharedcache_child_pid) { 3268 found_sharedcache_child = true; 3269 sharedcache_child_flags = sharedregion_flags; 3270 } else if (pid == getpid()) { 3271 found_sharedcache_self = true; 3272 sharedcache_self_flags = sharedregion_flags; 3273 } 3274 if (sharedregion_flags == kTaskSharedRegionOther && !(task_flags & kTaskSharedRegionInfoUnavailable)) { 3275 T_QUIET; T_EXPECT_NOTNULL(sharedregion_info, "kTaskSharedRegionOther should have a shared_cache_dyld_load_info struct"); 3276 T_QUIET; T_EXPECT_NOTNULL(sharedcache_id, "kTaskSharedRegionOther should have a sharedCacheID"); 3277 if (sharedcache_id != nil) { 3278 T_QUIET; T_EXPECT_NOTNULL(sharedCaches[sharedcache_id], "sharedCacheID %d should exist", [sharedcache_id intValue]); 3279 } 3280 } else { 3281 T_QUIET; T_EXPECT_NULL(sharedregion_info, "non-kTaskSharedRegionOther should have no shared_cache_dyld_load_info struct"); 3282 T_QUIET; T_EXPECT_NULL(sharedcache_id, "non-kTaskSharedRegionOther should have no sharedCacheID"); 3283 } 3284 } 3285 3286 if (expect_zombie_child && (pid == zombie_child_pid)) { 3287 found_zombie_child = true; 3288 3289 expected_num_tasks += 1; 3290 3291 uint64_t task_flags = [task_snapshot[@"ts_ss_flags"] unsignedLongLongValue]; 3292 T_ASSERT_TRUE((task_flags & kTerminatedSnapshot) == kTerminatedSnapshot, "child zombie marked as terminated"); 3293 3294 continue; 3295 } 3296 3297 if (expect_translated_child && (pid == translated_child_pid)) { 3298 found_translated_child = true; 3299 3300 uint64_t task_flags = [task_snapshot[@"ts_ss_flags"] unsignedLongLongValue]; 3301 T_EXPECT_BITS_SET(task_flags, kTaskIsTranslated, "child marked as translated"); 3302 3303 continue; 3304 } 3305 if (expect_exec_inprogress && (pid == exec_inprogress_pid || pid == -exec_inprogress_pid)) { 3306 exec_inprogress_found++; 3307 T_LOG("found exec task with pid %d, instance %d", pid, exec_inprogress_found); 3308 T_QUIET; T_ASSERT_LE(exec_inprogress_found, 2, "no more than two with the expected pid"); 3309 if (exec_inprogress_found == 2) { 3310 T_LOG("found 2 tasks with pid %d", exec_inprogress_pid); 3311 exec_inprogress_cb(containerid, exec_inprogress_containerid); 3312 } else { 3313 exec_inprogress_containerid = containerid; 3314 } 3315 } 3316 if (expect_driverkit && driverkit_cb != NULL) { 3317 driverkit_cb(pid); 3318 } 3319 if (expect_cseg_waitinfo) { 3320 NSArray *winfos = container[@"task_snapshots"][@"thread_waitinfo"]; 3321 3322 for (id i in winfos) { 3323 NSNumber *waitType = i[@"wait_type"]; 3324 NSNumber *owner = i[@"owner"]; 3325 if (waitType.intValue == kThreadWaitCompressor && 3326 owner.unsignedLongValue == cseg_expected_threadid) { 3327 found_cseg_waitinfo = true; 3328 break; 3329 } 3330 } 3331 } 3332 3333 if (expect_srp_waitinfo) { 3334 NSArray *tinfos = container[@"task_snapshots"][@"thread_turnstileinfo"]; 3335 NSArray *winfos = container[@"task_snapshots"][@"thread_waitinfo"]; 3336 for (id i in tinfos) { 3337 if (!found_srp_waitinfo) { 3338 bool found_thread = false; 3339 bool found_pid = false; 3340 if (([i[@"turnstile_flags"] intValue] & STACKSHOT_TURNSTILE_STATUS_THREAD) && 3341 [i[@"turnstile_context"] unsignedLongLongValue] == srp_expected_threadid && 3342 srp_expected_threadid != 0) { 3343 found_thread = true; 3344 } 3345 if (([i[@"turnstile_flags"] intValue] & STACKSHOT_TURNSTILE_STATUS_BLOCKED_ON_TASK) && 3346 [i[@"turnstile_context"] intValue] == srp_expected_pid && 3347 srp_expected_pid != -1) { 3348 found_pid = true; 3349 } 3350 if (found_pid || found_thread) { 3351 T_LOG("found SRP %s %lld waiter: %d", (found_thread ? "thread" : "pid"), 3352 [i[@"turnstile_context"] unsignedLongLongValue], [i[@"waiter"] intValue]); 3353 /* we found something that is blocking the correct threadid */ 3354 for (id j in winfos) { 3355 if ([j[@"waiter"] intValue] == [i[@"waiter"] intValue] && 3356 [j[@"wait_type"] intValue] == kThreadWaitPortReceive) { 3357 found_srp_waitinfo = true; 3358 T_EXPECT_EQ([j[@"wait_flags"] intValue], STACKSHOT_WAITINFO_FLAGS_SPECIALREPLY, 3359 "SRP waitinfo should be marked as a special reply"); 3360 break; 3361 } 3362 } 3363 3364 if (found_srp_waitinfo) { 3365 break; 3366 } 3367 } 3368 } 3369 } 3370 } 3371 3372 if (expect_sp_throttled) { 3373 NSArray *tinfos = container[@"task_snapshots"][@"thread_turnstileinfo"]; 3374 for (id i in tinfos) { 3375 if (([i[@"turnstile_flags"] intValue] & STACKSHOT_TURNSTILE_STATUS_PORTFLAGS) 3376 && [i[@"turnstile_context"] intValue] == throttled_service_ctx) { 3377 int portlabel_id = [i[@"portlabel_id"] intValue]; 3378 T_LOG("[pid:%d] Turnstile (flags = 0x%x, ctx = %d, portlabel_id = %d)", pid, 3379 [i[@"turnstile_flags"] intValue], [i[@"turnstile_context"] intValue], portlabel_id); 3380 for (id portid in container[@"task_snapshots"][@"portlabels"]) { 3381 if (portlabel_id != [portid intValue]) { 3382 continue; 3383 } 3384 3385 NSMutableDictionary *portlabel = container[@"task_snapshots"][@"portlabels"][portid]; 3386 T_ASSERT_TRUE(portlabel != nil, "Found portlabel id: %d", [portid intValue]); 3387 NSString *portlabel_name = portlabel[@"portlabel_name"]; 3388 T_EXPECT_TRUE(portlabel_name != nil, "Found portlabel %s", portlabel_name.UTF8String); 3389 T_EXPECT_EQ_STR(portlabel_name.UTF8String, THROTTLED_SERVICE_NAME, "throttled service port name matches"); 3390 T_EXPECT_EQ(([portlabel[@"portlabel_flags"] intValue] & STACKSHOT_PORTLABEL_THROTTLED) != 0, 3391 is_throttled, "Port %s throttled", is_throttled ? "is" : "isn't"); 3392 found_throttled_service = true; 3393 break; 3394 } 3395 } 3396 3397 if (found_throttled_service) { 3398 break; 3399 } 3400 } 3401 } 3402 3403 if (expect_suspendinfo) { 3404 // TODO: rdar://112563110 3405 } 3406 3407 3408 if (pid != getpid()) { 3409 break; 3410 } 3411 3412 T_EXPECT_EQ_STR(current_process_name(), 3413 [task_snapshot[@"ts_p_comm"] UTF8String], 3414 "current process name matches in stackshot"); 3415 3416 uint64_t task_flags = [task_snapshot[@"ts_ss_flags"] unsignedLongLongValue]; 3417 T_ASSERT_BITS_NOTSET(task_flags, kTerminatedSnapshot, "current process not marked as terminated"); 3418 T_ASSERT_BITS_NOTSET(task_flags, kTaskIsTranslated, "current process not marked as translated"); 3419 3420 T_QUIET; 3421 T_EXPECT_LE(pid, [task_snapshot[@"ts_unique_pid"] intValue], 3422 "unique pid is greater than pid"); 3423 3424 NSDictionary* task_cpu_architecture = container[@"task_snapshots"][@"task_cpu_architecture"]; 3425 T_QUIET; T_ASSERT_NOTNULL(task_cpu_architecture[@"cputype"], "have cputype"); 3426 T_QUIET; T_ASSERT_NOTNULL(task_cpu_architecture[@"cpusubtype"], "have cputype"); 3427 int cputype = [task_cpu_architecture[@"cputype"] intValue]; 3428 int cpusubtype = [task_cpu_architecture[@"cpusubtype"] intValue]; 3429 3430 struct proc_archinfo archinfo; 3431 int retval = proc_pidinfo(pid, PROC_PIDARCHINFO, 0, &archinfo, sizeof(archinfo)); 3432 T_QUIET; T_WITH_ERRNO; T_ASSERT_GT(retval, 0, "proc_pidinfo(PROC_PIDARCHINFO) returned a value > 0"); 3433 T_QUIET; T_ASSERT_EQ(retval, (int)sizeof(struct proc_archinfo), "proc_pidinfo call for PROC_PIDARCHINFO returned expected size"); 3434 T_QUIET; T_EXPECT_EQ(cputype, archinfo.p_cputype, "cpu type is correct"); 3435 T_QUIET; T_EXPECT_EQ(cpusubtype, archinfo.p_cpusubtype, "cpu subtype is correct"); 3436 3437 NSDictionary * codesigning_info = container[@"task_snapshots"][@"stackshot_task_codesigning_info"]; 3438 T_QUIET; T_ASSERT_NOTNULL(codesigning_info[@"csflags"], "have csflags"); 3439 uint64_t flags = [codesigning_info[@"csflags"] unsignedLongLongValue]; 3440 T_QUIET; T_EXPECT_GT(flags, 0, "nonzero csflags"); 3441 3442 T_QUIET; T_ASSERT_NOTNULL(container[@"task_snapshots"][@"jetsam_coalition"], "have jetsam coalition"); 3443 uint64_t jetsam_coalition = [container[@"task_snapshots"][@"jetsam_coalition"] unsignedLongLongValue]; 3444 T_QUIET; T_EXPECT_GT(jetsam_coalition, 0, "nonzero jetsam coalition"); 3445 3446 bool found_main_thread = false; 3447 uint64_t main_thread_id = -1ULL; 3448 bool found_null_kernel_frame = false; 3449 for (id thread_key in container[@"task_snapshots"][@"thread_snapshots"]) { 3450 NSMutableDictionary *thread = container[@"task_snapshots"][@"thread_snapshots"][thread_key]; 3451 NSDictionary *thread_snap = thread[@"thread_snapshot"]; 3452 3453 T_QUIET; T_EXPECT_GT([thread_snap[@"ths_thread_id"] intValue], 0, 3454 "thread ID of thread in current task is valid"); 3455 T_QUIET; T_EXPECT_GT([thread_snap[@"ths_base_priority"] intValue], 0, 3456 "base priority of thread in current task is valid"); 3457 T_QUIET; T_EXPECT_GT([thread_snap[@"ths_sched_priority"] intValue], 0, 3458 "scheduling priority of thread in current task is valid"); 3459 3460 NSString *pth_name = thread[@"pth_name"]; 3461 if (pth_name != nil && [pth_name isEqualToString:@TEST_THREAD_NAME]) { 3462 found_main_thread = true; 3463 main_thread_id = [thread_snap[@"ths_thread_id"] unsignedLongLongValue]; 3464 3465 T_QUIET; T_EXPECT_GT([thread_snap[@"ths_total_syscalls"] intValue], 0, 3466 "total syscalls of current thread is valid"); 3467 3468 NSDictionary *cpu_times = thread[@"cpu_times"]; 3469 T_EXPECT_GE([cpu_times[@"runnable_time"] intValue], 3470 [cpu_times[@"system_time"] intValue] + 3471 [cpu_times[@"user_time"] intValue], 3472 "runnable time of current thread is valid"); 3473 } 3474 if (!found_null_kernel_frame) { 3475 for (NSNumber *frame in thread[@"kernel_frames"]) { 3476 if (frame.unsignedLongValue == 0) { 3477 found_null_kernel_frame = true; 3478 break; 3479 } 3480 } 3481 } 3482 if (expect_asyncstack && !found_asyncstack && 3483 asyncstack_threadid == [thread_snap[@"ths_thread_id"] unsignedLongLongValue]) { 3484 found_asyncstack = true; 3485 NSArray* async_stack = thread[@"user_async_stack_frames"]; 3486 NSNumber* start_idx = thread[@"user_async_start_index"]; 3487 NSArray* user_stack = thread[@"user_stack_frames"]; 3488 T_QUIET; T_ASSERT_NOTNULL(async_stack, "async thread %#llx has user_async_stack_frames", asyncstack_threadid); 3489 T_QUIET; T_ASSERT_NOTNULL(start_idx, "async thread %#llx has user_async_start_index", asyncstack_threadid); 3490 T_QUIET; T_ASSERT_NOTNULL(user_stack, "async thread %#llx has user_stack_frames", asyncstack_threadid); 3491 T_QUIET; T_ASSERT_EQ(async_stack.count, asyncstack_stack.count, 3492 "actual async_stack count == expected async_stack count"); 3493 for (size_t i = 0; i < async_stack.count; i++) { 3494 T_EXPECT_EQ([async_stack[i][@"lr"] unsignedLongLongValue], 3495 [asyncstack_stack[i] unsignedLongLongValue], "frame %zu matches", i); 3496 } 3497 } 3498 } 3499 T_EXPECT_TRUE(found_main_thread, "found main thread for current task in stackshot"); 3500 T_EXPECT_FALSE(found_null_kernel_frame, "should not see any NULL kernel frames"); 3501 3502 if (expect_turnstile_lock && !found_turnstile_lock) { 3503 NSArray *tsinfos = container[@"task_snapshots"][@"thread_turnstileinfo"]; 3504 3505 for (id i in tsinfos) { 3506 if ([i[@"turnstile_context"] unsignedLongLongValue] == main_thread_id) { 3507 found_turnstile_lock = true; 3508 break; 3509 } 3510 } 3511 } 3512 break; 3513 } 3514 case STACKSHOT_KCTYPE_SHAREDCACHE_LOADINFO: { 3515 // Legacy shared cache info 3516 struct dyld_shared_cache_loadinfo *payload = kcdata_iter_payload(iter); 3517 T_ASSERT_EQ((size_t)kcdata_iter_size(iter), sizeof(*payload), "valid dyld_shared_cache_loadinfo struct"); 3518 3519 check_shared_cache_uuid(payload->sharedCacheUUID); 3520 3521 T_EXPECT_LE(payload->sharedCacheUnreliableSlidBaseAddress, 3522 payload->sharedCacheSlidFirstMapping, 3523 "SlidBaseAddress <= SlidFirstMapping"); 3524 T_EXPECT_GE(payload->sharedCacheUnreliableSlidBaseAddress + (7ull << 32) + (1ull << 29), 3525 payload->sharedCacheSlidFirstMapping, 3526 "SlidFirstMapping should be within 28.5gigs of SlidBaseAddress"); 3527 3528 size_t shared_cache_len; 3529 const void *addr = _dyld_get_shared_cache_range(&shared_cache_len); 3530 T_EXPECT_EQ((uint64_t)addr, payload->sharedCacheSlidFirstMapping, 3531 "SlidFirstMapping should match shared_cache_range"); 3532 3533 /* 3534 * check_shared_cache_uuid() asserts on failure, so we must have 3535 * found the shared cache UUID to be correct. 3536 */ 3537 found_shared_cache_uuid = true; 3538 break; 3539 } 3540 case KCDATA_TYPE_UINT64_DESC: { 3541 char *desc; 3542 uint64_t *data; 3543 uint32_t size; 3544 kcdata_iter_get_data_with_desc(iter, &desc, &data, &size); 3545 3546 if (strcmp(desc, "stackshot_tasks_count") == 0) { 3547 expected_num_tasks = *data; 3548 } else if (strcmp(desc, "stackshot_threads_count") == 0) { 3549 expected_num_threads = *data; 3550 } 3551 3552 break; 3553 } 3554 case STACKSHOT_KCTYPE_LATENCY_INFO_CPU: { 3555 struct stackshot_latency_cpu *cpu_latency = kcdata_iter_payload(iter); 3556 found_percpu_tasks += cpu_latency->tasks_processed; 3557 found_percpu_threads += cpu_latency->threads_processed; 3558 break; 3559 } 3560 } 3561 } 3562 3563 if (expect_sharedcache_child) { 3564 T_QUIET; T_ASSERT_TRUE(found_sharedcache_child, "found sharedcache child in kcdata"); 3565 T_QUIET; T_ASSERT_TRUE(found_sharedcache_self, "found self in kcdata"); 3566 if (found_sharedcache_child && found_sharedcache_self) { 3567 T_QUIET; T_ASSERT_NE(sharedcache_child_flags, (uint64_t)kTaskSharedRegionNone, "sharedcache child should have shared region"); 3568 T_QUIET; T_ASSERT_NE(sharedcache_self_flags, (uint64_t)kTaskSharedRegionNone, "sharedcache: self should have shared region"); 3569 if (sharedcache_self_flags == kTaskSharedRegionSystem && !sharedcache_child_sameaddr) { 3570 /* If we're in the system shared region, and the child has a different address, child must have an Other shared region */ 3571 T_ASSERT_EQ(sharedcache_child_flags, (uint64_t)kTaskSharedRegionOther, 3572 "sharedcache child should have Other shared region"); 3573 } 3574 } 3575 } 3576 3577 if (expect_transitioning_task) { 3578 T_QUIET; T_ASSERT_TRUE(found_transitioning_task, "found transitioning_task child in kcdata"); 3579 } 3580 3581 if (expect_exec_inprogress) { 3582 T_QUIET; T_ASSERT_GT(exec_inprogress_found, 0, "found at least 1 task for execing process"); 3583 } 3584 3585 if (expect_zombie_child) { 3586 T_QUIET; T_ASSERT_TRUE(found_zombie_child, "found zombie child in kcdata"); 3587 } 3588 3589 if (expect_postexec_child) { 3590 T_QUIET; T_ASSERT_TRUE(found_postexec_child, "found post-exec child in kcdata"); 3591 } 3592 3593 if (expect_translated_child) { 3594 T_QUIET; T_ASSERT_TRUE(found_translated_child, "found translated child in kcdata"); 3595 } 3596 3597 if (expect_shared_cache_layout) { 3598 T_QUIET; T_ASSERT_TRUE(found_shared_cache_layout, "shared cache layout found in kcdata"); 3599 } 3600 3601 if (expect_shared_cache_uuid) { 3602 T_QUIET; T_ASSERT_TRUE(found_shared_cache_uuid, "shared cache UUID found in kcdata"); 3603 } 3604 3605 if (expect_dispatch_queue_label) { 3606 T_QUIET; T_ASSERT_TRUE(found_dispatch_queue_label, "dispatch queue label found in kcdata"); 3607 } 3608 3609 if (expect_turnstile_lock) { 3610 T_QUIET; T_ASSERT_TRUE(found_turnstile_lock, "found expected deadlock"); 3611 } 3612 3613 if (expect_cseg_waitinfo) { 3614 T_QUIET; T_ASSERT_TRUE(found_cseg_waitinfo, "found c_seg waitinfo"); 3615 } 3616 3617 if (expect_srp_waitinfo) { 3618 T_QUIET; T_ASSERT_TRUE(found_srp_waitinfo, "found special reply port waitinfo"); 3619 } 3620 3621 if (expect_sp_throttled) { 3622 T_QUIET; T_ASSERT_TRUE(found_throttled_service, "found the throttled service"); 3623 } 3624 3625 if (expect_asyncstack) { 3626 T_QUIET; T_ASSERT_TRUE(found_asyncstack, "found async stack threadid"); 3627 } 3628 3629 if ([extra objectForKey:no_exclaves_key] != nil) { 3630 T_QUIET; T_ASSERT_FALSE(found_exclaves, "did not find any Exclaves data"); 3631 } 3632 3633 3634 bool check_counts = !delta && !found_transitioning_task && !expect_single_task && !expect_driverkit; 3635 3636 if (check_counts && (expected_num_threads != 0) && (found_percpu_threads != 0)) { 3637 /* If the task counts below check out, we can be sure that the per-cpu reported thread counts are accurate. */ 3638 T_QUIET; T_ASSERT_EQ_ULLONG(found_percpu_threads, expected_num_threads, "number of threads reported by CPUs matches expected count"); 3639 } 3640 3641 if (check_counts && (expected_num_tasks != 0)) { 3642 T_QUIET; T_ASSERT_EQ_ULLONG(found_tasks, expected_num_tasks, "number of tasks in kcdata matches expected count"); 3643 if (found_percpu_tasks != 0) { 3644 T_QUIET; T_ASSERT_EQ_ULLONG(found_percpu_tasks, expected_num_tasks, "number of tasks reported by CPUs matches expected count"); 3645 } 3646 } 3647 3648 T_ASSERT_FALSE(KCDATA_ITER_FOREACH_FAILED(iter), "successfully iterated kcdata"); 3649 3650 free(inflatedBufferBase); 3651} 3652 3653static const char * 3654current_process_name(void) 3655{ 3656 static char name[64]; 3657 3658 if (!name[0]) { 3659 int ret = proc_name(getpid(), name, sizeof(name)); 3660 T_QUIET; 3661 T_ASSERT_POSIX_SUCCESS(ret, "proc_name failed for current process"); 3662 } 3663 3664 return name; 3665} 3666 3667static void 3668initialize_thread(void) 3669{ 3670 int ret = pthread_setname_np(TEST_THREAD_NAME); 3671 T_QUIET; 3672 T_ASSERT_POSIX_ZERO(ret, "set thread name to %s", TEST_THREAD_NAME); 3673} 3674 3675T_DECL(dirty_buffer, "test that stackshot works with a dirty input buffer from kernel", T_META_TAG_VM_PREFERRED) 3676{ 3677 const char *test_sysctl = "stackshot_dirty_buffer"; 3678 int64_t result; 3679 3680 T_LOG("running sysctl to trigger kernel-driven stackshot"); 3681 result = run_sysctl_test(test_sysctl, 0); 3682 T_ASSERT_EQ_LLONG(result, 1, "sysctl result indicated success"); 3683} 3684 3685T_DECL(kernel_initiated, "smoke test that stackshot works with kernel-initiated stackshots", T_META_TAG_VM_PREFERRED) 3686{ 3687 const char *test_sysctl = "stackshot_kernel_initiator"; 3688 int64_t result; 3689 __block bool did_get_stackshot = false; 3690 3691 initialize_thread(); // must run before the stackshots to keep parse_stackshot happy 3692 3693 T_LOG("running sysctl to trigger kernel-driven stackshot type 1"); 3694 result = run_sysctl_test(test_sysctl, 1); 3695 T_ASSERT_EQ_LLONG(result, 1, "sysctl result indicated success"); 3696 3697 T_LOG("running sysctl to trigger kernel-driven stackshot type 2"); 3698 result = run_sysctl_test(test_sysctl, 2); 3699 T_ASSERT_EQ_LLONG(result, 1, "sysctl result indicated success"); 3700 3701 struct scenario scenario = { 3702 .name = "from_kernel_initiated", 3703 .flags = STACKSHOT_RETRIEVE_EXISTING_BUFFER, 3704 }; 3705 3706 T_LOG("attempting to fetch stored in-kernel stackshot"); 3707 take_stackshot(&scenario, false, ^(void *ssbuf, size_t sslen) { 3708 T_ASSERT_NOTNULL(ssbuf, "non-null kernel stackshot"); 3709 T_ASSERT_GT(sslen, 0, "non-zero stackshot size"); 3710 parse_stackshot(0, ssbuf, sslen, nil); 3711 did_get_stackshot = true; 3712 }); 3713 3714 T_ASSERT_TRUE(did_get_stackshot, "got stackshot from kernel type 2"); 3715} 3716