1 //===-- sanitizer_mac.cc --------------------------------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file is shared between various sanitizers' runtime libraries and
11 // implements OSX-specific functions.
12 //===----------------------------------------------------------------------===//
14 #include "sanitizer_platform.h"
16 #include "sanitizer_mac.h"
18 // Use 64-bit inodes in file operations. ASan does not support OS X 10.5, so
19 // the clients will most certainly use 64-bit ones as well.
20 #ifndef _DARWIN_USE_64_BIT_INODE
21 #define _DARWIN_USE_64_BIT_INODE 1
25 #include "sanitizer_common.h"
26 #include "sanitizer_flags.h"
27 #include "sanitizer_internal_defs.h"
28 #include "sanitizer_libc.h"
29 #include "sanitizer_placement_new.h"
30 #include "sanitizer_platform_limits_posix.h"
31 #include "sanitizer_procmaps.h"
34 #include <crt_externs.h> // for _NSGetEnviron
36 extern char **environ;
39 #if defined(__has_include) && __has_include(<os/trace.h>)
40 #define SANITIZER_OS_TRACE 1
43 #define SANITIZER_OS_TRACE 0
47 #include <crt_externs.h> // for _NSGetArgv and _NSGetEnviron
50 extern char ***_NSGetArgv(void);
55 #include <dlfcn.h> // for dladdr()
58 #include <libkern/OSAtomic.h>
59 #include <mach-o/dyld.h>
60 #include <mach/mach.h>
61 #include <mach/vm_statistics.h>
67 #include <sys/resource.h>
69 #include <sys/sysctl.h>
70 #include <sys/types.h>
75 // From <crt_externs.h>, but we don't have that file on iOS.
77 extern char ***_NSGetArgv(void);
78 extern char ***_NSGetEnviron(void);
81 // From <mach/mach_vm.h>, but we don't have that file on iOS.
83 extern kern_return_t mach_vm_region_recurse(
85 mach_vm_address_t *address,
87 natural_t *nesting_depth,
88 vm_region_recurse_info_t info,
89 mach_msg_type_number_t *infoCnt);
92 namespace __sanitizer {
94 #include "sanitizer_syscall_generic.inc"
96 // Direct syscalls, don't call libmalloc hooks.
97 extern "C" void *__mmap(void *addr, size_t len, int prot, int flags, int fildes,
99 extern "C" int __munmap(void *, size_t);
101 // ---------------------- sanitizer_libc.h
102 uptr internal_mmap(void *addr, size_t length, int prot, int flags,
103 int fd, u64 offset) {
104 if (fd == -1) fd = VM_MAKE_TAG(VM_MEMORY_ANALYSIS_TOOL);
105 return (uptr)__mmap(addr, length, prot, flags, fd, offset);
108 uptr internal_munmap(void *addr, uptr length) {
109 return __munmap(addr, length);
112 int internal_mprotect(void *addr, uptr length, int prot) {
113 return mprotect(addr, length, prot);
116 uptr internal_close(fd_t fd) {
120 uptr internal_open(const char *filename, int flags) {
121 return open(filename, flags);
124 uptr internal_open(const char *filename, int flags, u32 mode) {
125 return open(filename, flags, mode);
128 uptr internal_read(fd_t fd, void *buf, uptr count) {
129 return read(fd, buf, count);
132 uptr internal_write(fd_t fd, const void *buf, uptr count) {
133 return write(fd, buf, count);
136 uptr internal_stat(const char *path, void *buf) {
137 return stat(path, (struct stat *)buf);
140 uptr internal_lstat(const char *path, void *buf) {
141 return lstat(path, (struct stat *)buf);
144 uptr internal_fstat(fd_t fd, void *buf) {
145 return fstat(fd, (struct stat *)buf);
148 uptr internal_filesize(fd_t fd) {
150 if (internal_fstat(fd, &st))
152 return (uptr)st.st_size;
155 uptr internal_dup2(int oldfd, int newfd) {
156 return dup2(oldfd, newfd);
159 uptr internal_readlink(const char *path, char *buf, uptr bufsize) {
160 return readlink(path, buf, bufsize);
163 uptr internal_unlink(const char *path) {
167 uptr internal_sched_yield() {
168 return sched_yield();
171 void internal__exit(int exitcode) {
175 unsigned int internal_sleep(unsigned int seconds) {
176 return sleep(seconds);
179 uptr internal_getpid() {
183 int internal_sigaction(int signum, const void *act, void *oldact) {
184 return sigaction(signum,
185 (struct sigaction *)act, (struct sigaction *)oldact);
188 void internal_sigfillset(__sanitizer_sigset_t *set) { sigfillset(set); }
190 uptr internal_sigprocmask(int how, __sanitizer_sigset_t *set,
191 __sanitizer_sigset_t *oldset) {
192 return sigprocmask(how, set, oldset);
195 // Doesn't call pthread_atfork() handlers.
196 extern "C" pid_t __fork(void);
198 int internal_fork() {
202 int internal_forkpty(int *amaster) {
204 if (openpty(&master, &slave, nullptr, nullptr, nullptr) == -1) return -1;
213 if (login_tty(slave) != 0) {
214 // We already forked, there's not much we can do. Let's quit.
215 Report("login_tty failed (errno %d)\n", errno);
225 uptr internal_rename(const char *oldpath, const char *newpath) {
226 return rename(oldpath, newpath);
229 uptr internal_ftruncate(fd_t fd, uptr size) {
230 return ftruncate(fd, size);
233 uptr internal_execve(const char *filename, char *const argv[],
234 char *const envp[]) {
235 return execve(filename, argv, envp);
238 uptr internal_waitpid(int pid, int *status, int options) {
239 return waitpid(pid, status, options);
242 // ----------------- sanitizer_common.h
243 bool FileExists(const char *filename) {
245 if (stat(filename, &st))
247 // Sanity check: filename is a regular file.
248 return S_ISREG(st.st_mode);
252 // FIXME: This can potentially get truncated on 32-bit, where uptr is 4 bytes.
254 pthread_threadid_np(nullptr, &tid);
258 void GetThreadStackTopAndBottom(bool at_initialization, uptr *stack_top,
259 uptr *stack_bottom) {
262 uptr stacksize = pthread_get_stacksize_np(pthread_self());
263 // pthread_get_stacksize_np() returns an incorrect stack size for the main
264 // thread on Mavericks. See
265 // https://github.com/google/sanitizers/issues/261
266 if ((GetMacosVersion() >= MACOS_VERSION_MAVERICKS) && at_initialization &&
267 stacksize == (1 << 19)) {
269 CHECK_EQ(getrlimit(RLIMIT_STACK, &rl), 0);
270 // Most often rl.rlim_cur will be the desired 8M.
271 if (rl.rlim_cur < kMaxThreadStackSize) {
272 stacksize = rl.rlim_cur;
274 stacksize = kMaxThreadStackSize;
277 void *stackaddr = pthread_get_stackaddr_np(pthread_self());
278 *stack_top = (uptr)stackaddr;
279 *stack_bottom = *stack_top - stacksize;
282 char **GetEnviron() {
284 char ***env_ptr = _NSGetEnviron();
286 Report("_NSGetEnviron() returned NULL. Please make sure __asan_init() is "
287 "called after libSystem_initializer().\n");
290 char **environ = *env_ptr;
296 const char *GetEnv(const char *name) {
297 char **env = GetEnviron();
298 uptr name_len = internal_strlen(name);
300 uptr len = internal_strlen(*env);
301 if (len > name_len) {
302 const char *p = *env;
303 if (!internal_memcmp(p, name, name_len) &&
304 p[name_len] == '=') { // Match.
305 return *env + name_len + 1; // String starting after =.
313 uptr ReadBinaryName(/*out*/char *buf, uptr buf_len) {
314 CHECK_LE(kMaxPathLength, buf_len);
316 // On OS X the executable path is saved to the stack by dyld. Reading it
317 // from there is much faster than calling dladdr, especially for large
318 // binaries with symbols.
319 InternalScopedString exe_path(kMaxPathLength);
320 uint32_t size = exe_path.size();
321 if (_NSGetExecutablePath(exe_path.data(), &size) == 0 &&
322 realpath(exe_path.data(), buf) != 0) {
323 return internal_strlen(buf);
328 uptr ReadLongProcessName(/*out*/char *buf, uptr buf_len) {
329 return ReadBinaryName(buf, buf_len);
337 return sysconf(_SC_PAGESIZE);
340 BlockingMutex::BlockingMutex() {
341 internal_memset(this, 0, sizeof(*this));
344 void BlockingMutex::Lock() {
345 CHECK(sizeof(OSSpinLock) <= sizeof(opaque_storage_));
346 CHECK_EQ(OS_SPINLOCK_INIT, 0);
347 CHECK_NE(owner_, (uptr)pthread_self());
348 OSSpinLockLock((OSSpinLock*)&opaque_storage_);
350 owner_ = (uptr)pthread_self();
353 void BlockingMutex::Unlock() {
354 CHECK(owner_ == (uptr)pthread_self());
356 OSSpinLockUnlock((OSSpinLock*)&opaque_storage_);
359 void BlockingMutex::CheckLocked() {
360 CHECK_EQ((uptr)pthread_self(), owner_);
374 void GetThreadStackAndTls(bool main, uptr *stk_addr, uptr *stk_size,
375 uptr *tls_addr, uptr *tls_size) {
377 uptr stack_top, stack_bottom;
378 GetThreadStackTopAndBottom(main, &stack_top, &stack_bottom);
379 *stk_addr = stack_bottom;
380 *stk_size = stack_top - stack_bottom;
391 void ListOfModules::init() {
393 MemoryMappingLayout memory_mapping(false);
394 memory_mapping.DumpListOfModules(&modules_);
397 bool IsHandledDeadlySignal(int signum) {
398 if ((SANITIZER_WATCHOS || SANITIZER_TVOS) && !(SANITIZER_IOSSIM))
399 // Handling fatal signals on watchOS and tvOS devices is disallowed.
401 if (common_flags()->handle_abort && signum == SIGABRT)
403 if (common_flags()->handle_sigill && signum == SIGILL)
405 return (signum == SIGSEGV || signum == SIGBUS) && common_flags()->handle_segv;
408 MacosVersion cached_macos_version = MACOS_VERSION_UNINITIALIZED;
410 MacosVersion GetMacosVersionInternal() {
411 int mib[2] = { CTL_KERN, KERN_OSRELEASE };
413 uptr len = 0, maxlen = sizeof(version) / sizeof(version[0]);
414 for (uptr i = 0; i < maxlen; i++) version[i] = '\0';
415 // Get the version length.
416 CHECK_NE(sysctl(mib, 2, 0, &len, 0, 0), -1);
417 CHECK_LT(len, maxlen);
418 CHECK_NE(sysctl(mib, 2, version, &len, 0, 0), -1);
419 switch (version[0]) {
420 case '9': return MACOS_VERSION_LEOPARD;
422 switch (version[1]) {
423 case '0': return MACOS_VERSION_SNOW_LEOPARD;
424 case '1': return MACOS_VERSION_LION;
425 case '2': return MACOS_VERSION_MOUNTAIN_LION;
426 case '3': return MACOS_VERSION_MAVERICKS;
427 case '4': return MACOS_VERSION_YOSEMITE;
429 if (IsDigit(version[1]))
430 return MACOS_VERSION_UNKNOWN_NEWER;
432 return MACOS_VERSION_UNKNOWN;
435 default: return MACOS_VERSION_UNKNOWN;
439 MacosVersion GetMacosVersion() {
440 atomic_uint32_t *cache =
441 reinterpret_cast<atomic_uint32_t*>(&cached_macos_version);
442 MacosVersion result =
443 static_cast<MacosVersion>(atomic_load(cache, memory_order_acquire));
444 if (result == MACOS_VERSION_UNINITIALIZED) {
445 result = GetMacosVersionInternal();
446 atomic_store(cache, result, memory_order_release);
451 bool PlatformHasDifferentMemcpyAndMemmove() {
452 // On OS X 10.7 memcpy() and memmove() are both resolved
453 // into memmove$VARIANT$sse42.
454 // See also https://github.com/google/sanitizers/issues/34.
455 // TODO(glider): need to check dynamically that memcpy() and memmove() are
456 // actually the same function.
457 return GetMacosVersion() == MACOS_VERSION_SNOW_LEOPARD;
461 struct task_basic_info info;
462 unsigned count = TASK_BASIC_INFO_COUNT;
463 kern_return_t result =
464 task_info(mach_task_self(), TASK_BASIC_INFO, (task_info_t)&info, &count);
465 if (UNLIKELY(result != KERN_SUCCESS)) {
466 Report("Cannot get task info. Error: %d\n", result);
469 return info.resident_size;
472 void *internal_start_thread(void(*func)(void *arg), void *arg) {
473 // Start the thread with signals blocked, otherwise it can steal user signals.
474 __sanitizer_sigset_t set, old;
475 internal_sigfillset(&set);
476 internal_sigprocmask(SIG_SETMASK, &set, &old);
478 pthread_create(&th, 0, (void*(*)(void *arg))func, arg);
479 internal_sigprocmask(SIG_SETMASK, &old, 0);
483 void internal_join_thread(void *th) { pthread_join((pthread_t)th, 0); }
486 static BlockingMutex syslog_lock(LINKER_INITIALIZED);
489 void WriteOneLineToSyslog(const char *s) {
491 syslog_lock.CheckLocked();
492 asl_log(nullptr, nullptr, ASL_LEVEL_ERR, "%s", s);
496 void LogMessageOnPrintf(const char *str) {
497 // Log all printf output to CrashLog.
498 if (common_flags()->abort_on_error)
499 CRAppendCrashLogMessage(str);
502 void LogFullErrorReport(const char *buffer) {
504 // Log with os_trace. This will make it into the crash log.
505 #if SANITIZER_OS_TRACE
506 if (GetMacosVersion() >= MACOS_VERSION_YOSEMITE) {
507 // os_trace requires the message (format parameter) to be a string literal.
508 if (internal_strncmp(SanitizerToolName, "AddressSanitizer",
509 sizeof("AddressSanitizer") - 1) == 0)
510 os_trace("Address Sanitizer reported a failure.");
511 else if (internal_strncmp(SanitizerToolName, "UndefinedBehaviorSanitizer",
512 sizeof("UndefinedBehaviorSanitizer") - 1) == 0)
513 os_trace("Undefined Behavior Sanitizer reported a failure.");
514 else if (internal_strncmp(SanitizerToolName, "ThreadSanitizer",
515 sizeof("ThreadSanitizer") - 1) == 0)
516 os_trace("Thread Sanitizer reported a failure.");
518 os_trace("Sanitizer tool reported a failure.");
520 if (common_flags()->log_to_syslog)
521 os_trace("Consult syslog for more information.");
526 // The logging on OS X may call pthread_create so we need the threading
527 // environment to be fully initialized. Also, this should never be called when
528 // holding the thread registry lock since that may result in a deadlock. If
529 // the reporting thread holds the thread registry mutex, and asl_log waits
530 // for GCD to dispatch a new thread, the process will deadlock, because the
531 // pthread_create wrapper needs to acquire the lock as well.
532 BlockingMutexLock l(&syslog_lock);
533 if (common_flags()->log_to_syslog)
534 WriteToSyslog(buffer);
536 // The report is added to CrashLog as part of logging all of Printf output.
540 SignalContext::WriteFlag SignalContext::GetWriteFlag(void *context) {
541 #if defined(__x86_64__) || defined(__i386__)
542 ucontext_t *ucontext = static_cast<ucontext_t*>(context);
543 return ucontext->uc_mcontext->__es.__err & 2 /*T_PF_WRITE*/ ? WRITE : READ;
549 void GetPcSpBp(void *context, uptr *pc, uptr *sp, uptr *bp) {
550 ucontext_t *ucontext = (ucontext_t*)context;
551 # if defined(__aarch64__)
552 *pc = ucontext->uc_mcontext->__ss.__pc;
553 # if defined(__IPHONE_8_0) && __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_8_0
554 *bp = ucontext->uc_mcontext->__ss.__fp;
556 *bp = ucontext->uc_mcontext->__ss.__lr;
558 *sp = ucontext->uc_mcontext->__ss.__sp;
559 # elif defined(__x86_64__)
560 *pc = ucontext->uc_mcontext->__ss.__rip;
561 *bp = ucontext->uc_mcontext->__ss.__rbp;
562 *sp = ucontext->uc_mcontext->__ss.__rsp;
563 # elif defined(__arm__)
564 *pc = ucontext->uc_mcontext->__ss.__pc;
565 *bp = ucontext->uc_mcontext->__ss.__r[7];
566 *sp = ucontext->uc_mcontext->__ss.__sp;
567 # elif defined(__i386__)
568 *pc = ucontext->uc_mcontext->__ss.__eip;
569 *bp = ucontext->uc_mcontext->__ss.__ebp;
570 *sp = ucontext->uc_mcontext->__ss.__esp;
572 # error "Unknown architecture"
577 static const char kDyldInsertLibraries[] = "DYLD_INSERT_LIBRARIES";
578 LowLevelAllocator allocator_for_env;
580 // Change the value of the env var |name|, leaking the original value.
581 // If |name_value| is NULL, the variable is deleted from the environment,
582 // otherwise the corresponding "NAME=value" string is replaced with
584 void LeakyResetEnv(const char *name, const char *name_value) {
585 char **env = GetEnviron();
586 uptr name_len = internal_strlen(name);
588 uptr len = internal_strlen(*env);
589 if (len > name_len) {
590 const char *p = *env;
591 if (!internal_memcmp(p, name, name_len) && p[name_len] == '=') {
594 // Replace the old value with the new one.
595 *env = const_cast<char*>(name_value);
597 // Shift the subsequent pointers back.
609 SANITIZER_WEAK_CXX_DEFAULT_IMPL
610 bool ReexecDisabled() {
614 extern "C" SANITIZER_WEAK_ATTRIBUTE double dyldVersionNumber;
615 static const double kMinDyldVersionWithAutoInterposition = 360.0;
617 bool DyldNeedsEnvVariable() {
618 // Although sanitizer support was added to LLVM on OS X 10.7+, GCC users
619 // still may want use them on older systems. On older Darwin platforms, dyld
620 // doesn't export dyldVersionNumber symbol and we simply return true.
621 if (!&dyldVersionNumber) return true;
622 // If running on OS X 10.11+ or iOS 9.0+, dyld will interpose even if
623 // DYLD_INSERT_LIBRARIES is not set. However, checking OS version via
624 // GetMacosVersion() doesn't work for the simulator. Let's instead check
625 // `dyldVersionNumber`, which is exported by dyld, against a known version
626 // number from the first OS release where this appeared.
627 return dyldVersionNumber < kMinDyldVersionWithAutoInterposition;
631 if (ReexecDisabled()) return;
633 // Make sure the dynamic runtime library is preloaded so that the
634 // wrappers work. If it is not, set DYLD_INSERT_LIBRARIES and re-exec
637 RAW_CHECK(dladdr((void*)((uptr)&__sanitizer_report_error_summary), &info));
638 char *dyld_insert_libraries =
639 const_cast<char*>(GetEnv(kDyldInsertLibraries));
640 uptr old_env_len = dyld_insert_libraries ?
641 internal_strlen(dyld_insert_libraries) : 0;
642 uptr fname_len = internal_strlen(info.dli_fname);
643 const char *dylib_name = StripModuleName(info.dli_fname);
644 uptr dylib_name_len = internal_strlen(dylib_name);
646 bool lib_is_in_env = dyld_insert_libraries &&
647 internal_strstr(dyld_insert_libraries, dylib_name);
648 if (DyldNeedsEnvVariable() && !lib_is_in_env) {
649 // DYLD_INSERT_LIBRARIES is not set or does not contain the runtime
651 InternalScopedString program_name(1024);
652 uint32_t buf_size = program_name.size();
653 _NSGetExecutablePath(program_name.data(), &buf_size);
654 char *new_env = const_cast<char*>(info.dli_fname);
655 if (dyld_insert_libraries) {
656 // Append the runtime dylib name to the existing value of
657 // DYLD_INSERT_LIBRARIES.
658 new_env = (char*)allocator_for_env.Allocate(old_env_len + fname_len + 2);
659 internal_strncpy(new_env, dyld_insert_libraries, old_env_len);
660 new_env[old_env_len] = ':';
661 // Copy fname_len and add a trailing zero.
662 internal_strncpy(new_env + old_env_len + 1, info.dli_fname,
664 // Ok to use setenv() since the wrappers don't depend on the value of
666 setenv(kDyldInsertLibraries, new_env, /*overwrite*/1);
668 // Set DYLD_INSERT_LIBRARIES equal to the runtime dylib name.
669 setenv(kDyldInsertLibraries, info.dli_fname, /*overwrite*/0);
671 VReport(1, "exec()-ing the program with\n");
672 VReport(1, "%s=%s\n", kDyldInsertLibraries, new_env);
673 VReport(1, "to enable wrappers.\n");
674 execv(program_name.data(), *_NSGetArgv());
676 // We get here only if execv() failed.
677 Report("ERROR: The process is launched without DYLD_INSERT_LIBRARIES, "
678 "which is required for the sanitizer to work. We tried to set the "
679 "environment variable and re-execute itself, but execv() failed, "
680 "possibly because of sandbox restrictions. Make sure to launch the "
681 "executable with:\n%s=%s\n", kDyldInsertLibraries, new_env);
682 RAW_CHECK("execv failed" && 0);
685 // Verify that interceptors really work. We'll use dlsym to locate
686 // "pthread_create", if interceptors are working, it should really point to
687 // "wrap_pthread_create" within our own dylib.
688 Dl_info info_pthread_create;
689 void *dlopen_addr = dlsym(RTLD_DEFAULT, "pthread_create");
690 RAW_CHECK(dladdr(dlopen_addr, &info_pthread_create));
691 if (internal_strcmp(info.dli_fname, info_pthread_create.dli_fname) != 0) {
693 "ERROR: Interceptors are not working. This may be because %s is "
694 "loaded too late (e.g. via dlopen). Please launch the executable "
696 SanitizerToolName, kDyldInsertLibraries, info.dli_fname);
697 RAW_CHECK("interceptors not installed" && 0);
703 // DYLD_INSERT_LIBRARIES is set and contains the runtime library. Let's remove
704 // the dylib from the environment variable, because interceptors are installed
705 // and we don't want our children to inherit the variable.
707 uptr env_name_len = internal_strlen(kDyldInsertLibraries);
708 // Allocate memory to hold the previous env var name, its value, the '='
709 // sign and the '\0' char.
710 char *new_env = (char*)allocator_for_env.Allocate(
711 old_env_len + 2 + env_name_len);
713 internal_memset(new_env, '\0', old_env_len + 2 + env_name_len);
714 internal_strncpy(new_env, kDyldInsertLibraries, env_name_len);
715 new_env[env_name_len] = '=';
716 char *new_env_pos = new_env + env_name_len + 1;
718 // Iterate over colon-separated pieces of |dyld_insert_libraries|.
719 char *piece_start = dyld_insert_libraries;
720 char *piece_end = NULL;
721 char *old_env_end = dyld_insert_libraries + old_env_len;
723 if (piece_start[0] == ':') piece_start++;
724 piece_end = internal_strchr(piece_start, ':');
725 if (!piece_end) piece_end = dyld_insert_libraries + old_env_len;
726 if ((uptr)(piece_start - dyld_insert_libraries) > old_env_len) break;
727 uptr piece_len = piece_end - piece_start;
729 char *filename_start =
730 (char *)internal_memrchr(piece_start, '/', piece_len);
731 uptr filename_len = piece_len;
732 if (filename_start) {
734 filename_len = piece_len - (filename_start - piece_start);
736 filename_start = piece_start;
739 // If the current piece isn't the runtime library name,
740 // append it to new_env.
741 if ((dylib_name_len != filename_len) ||
742 (internal_memcmp(filename_start, dylib_name, dylib_name_len) != 0)) {
743 if (new_env_pos != new_env + env_name_len + 1) {
744 new_env_pos[0] = ':';
747 internal_strncpy(new_env_pos, piece_start, piece_len);
748 new_env_pos += piece_len;
750 // Move on to the next piece.
751 piece_start = piece_end;
752 } while (piece_start < old_env_end);
754 // Can't use setenv() here, because it requires the allocator to be
756 // FIXME: instead of filtering DYLD_INSERT_LIBRARIES here, do it in
757 // a separate function called after InitializeAllocator().
758 if (new_env_pos == new_env + env_name_len + 1) new_env = NULL;
759 LeakyResetEnv(kDyldInsertLibraries, new_env);
761 #endif // SANITIZER_GO
764 return *_NSGetArgv();
767 uptr FindAvailableMemoryRange(uptr shadow_size,
770 typedef vm_region_submap_short_info_data_64_t RegionInfo;
771 enum { kRegionInfoSize = VM_REGION_SUBMAP_SHORT_INFO_COUNT_64 };
772 // Start searching for available memory region past PAGEZERO, which is
773 // 4KB on 32-bit and 4GB on 64-bit.
774 mach_vm_address_t start_address =
775 (SANITIZER_WORDSIZE == 32) ? 0x000000001000 : 0x000100000000;
777 mach_vm_address_t address = start_address;
778 mach_vm_address_t free_begin = start_address;
779 kern_return_t kr = KERN_SUCCESS;
780 while (kr == KERN_SUCCESS) {
781 mach_vm_size_t vmsize = 0;
784 mach_msg_type_number_t count = kRegionInfoSize;
785 kr = mach_vm_region_recurse(mach_task_self(), &address, &vmsize, &depth,
786 (vm_region_info_t)&vminfo, &count);
787 if (free_begin != address) {
788 // We found a free region [free_begin..address-1].
789 uptr shadow_address = RoundUpTo((uptr)free_begin + left_padding,
791 if (shadow_address + shadow_size < (uptr)address) {
792 return shadow_address;
795 // Move to the next region.
797 free_begin = address;
800 // We looked at all free regions and could not find one large enough.
804 // FIXME implement on this platform.
805 void GetMemoryProfile(fill_profile_f cb, uptr *stats, uptr stats_size) { }
807 void SignalContext::DumpAllRegisters(void *context) {
808 Report("Register values:\n");
810 ucontext_t *ucontext = (ucontext_t*)context;
811 # define DUMPREG64(r) \
812 Printf("%s = 0x%016llx ", #r, ucontext->uc_mcontext->__ss.__ ## r);
813 # define DUMPREG32(r) \
814 Printf("%s = 0x%08x ", #r, ucontext->uc_mcontext->__ss.__ ## r);
815 # define DUMPREG_(r) Printf(" "); DUMPREG(r);
816 # define DUMPREG__(r) Printf(" "); DUMPREG(r);
817 # define DUMPREG___(r) Printf(" "); DUMPREG(r);
819 # if defined(__x86_64__)
820 # define DUMPREG(r) DUMPREG64(r)
821 DUMPREG(rax); DUMPREG(rbx); DUMPREG(rcx); DUMPREG(rdx); Printf("\n");
822 DUMPREG(rdi); DUMPREG(rsi); DUMPREG(rbp); DUMPREG(rsp); Printf("\n");
823 DUMPREG_(r8); DUMPREG_(r9); DUMPREG(r10); DUMPREG(r11); Printf("\n");
824 DUMPREG(r12); DUMPREG(r13); DUMPREG(r14); DUMPREG(r15); Printf("\n");
825 # elif defined(__i386__)
826 # define DUMPREG(r) DUMPREG32(r)
827 DUMPREG(eax); DUMPREG(ebx); DUMPREG(ecx); DUMPREG(edx); Printf("\n");
828 DUMPREG(edi); DUMPREG(esi); DUMPREG(ebp); DUMPREG(esp); Printf("\n");
829 # elif defined(__aarch64__)
830 # define DUMPREG(r) DUMPREG64(r)
831 DUMPREG_(x[0]); DUMPREG_(x[1]); DUMPREG_(x[2]); DUMPREG_(x[3]); Printf("\n");
832 DUMPREG_(x[4]); DUMPREG_(x[5]); DUMPREG_(x[6]); DUMPREG_(x[7]); Printf("\n");
833 DUMPREG_(x[8]); DUMPREG_(x[9]); DUMPREG(x[10]); DUMPREG(x[11]); Printf("\n");
834 DUMPREG(x[12]); DUMPREG(x[13]); DUMPREG(x[14]); DUMPREG(x[15]); Printf("\n");
835 DUMPREG(x[16]); DUMPREG(x[17]); DUMPREG(x[18]); DUMPREG(x[19]); Printf("\n");
836 DUMPREG(x[20]); DUMPREG(x[21]); DUMPREG(x[22]); DUMPREG(x[23]); Printf("\n");
837 DUMPREG(x[24]); DUMPREG(x[25]); DUMPREG(x[26]); DUMPREG(x[27]); Printf("\n");
838 DUMPREG(x[28]); DUMPREG___(fp); DUMPREG___(lr); DUMPREG___(sp); Printf("\n");
839 # elif defined(__arm__)
840 # define DUMPREG(r) DUMPREG32(r)
841 DUMPREG_(r[0]); DUMPREG_(r[1]); DUMPREG_(r[2]); DUMPREG_(r[3]); Printf("\n");
842 DUMPREG_(r[4]); DUMPREG_(r[5]); DUMPREG_(r[6]); DUMPREG_(r[7]); Printf("\n");
843 DUMPREG_(r[8]); DUMPREG_(r[9]); DUMPREG(r[10]); DUMPREG(r[11]); Printf("\n");
844 DUMPREG(r[12]); DUMPREG___(sp); DUMPREG___(lr); DUMPREG___(pc); Printf("\n");
846 # error "Unknown architecture"
857 static inline bool CompareBaseAddress(const LoadedModule &a,
858 const LoadedModule &b) {
859 return a.base_address() < b.base_address();
862 void FormatUUID(char *out, uptr size, const u8 *uuid) {
863 internal_snprintf(out, size,
864 "<%02X%02X%02X%02X-%02X%02X-%02X%02X-%02X%02X-"
865 "%02X%02X%02X%02X%02X%02X>",
866 uuid[0], uuid[1], uuid[2], uuid[3], uuid[4], uuid[5],
867 uuid[6], uuid[7], uuid[8], uuid[9], uuid[10], uuid[11],
868 uuid[12], uuid[13], uuid[14], uuid[15]);
871 void PrintModuleMap() {
872 Printf("Process module map:\n");
873 MemoryMappingLayout memory_mapping(false);
874 InternalMmapVector<LoadedModule> modules(/*initial_capacity*/ 128);
875 memory_mapping.DumpListOfModules(&modules);
876 InternalSort(&modules, modules.size(), CompareBaseAddress);
877 for (uptr i = 0; i < modules.size(); ++i) {
879 FormatUUID(uuid_str, sizeof(uuid_str), modules[i].uuid());
880 Printf("0x%zx-0x%zx %s (%s) %s\n", modules[i].base_address(),
881 modules[i].max_executable_address(), modules[i].full_name(),
882 ModuleArchToString(modules[i].arch()), uuid_str);
884 Printf("End of module map.\n");
887 } // namespace __sanitizer
889 #endif // SANITIZER_MAC