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 (but not available on 10.6).
97 extern "C" void *__mmap(void *addr, size_t len, int prot, int flags, int fildes,
98 off_t off) SANITIZER_WEAK_ATTRIBUTE;
99 extern "C" int __munmap(void *, size_t) SANITIZER_WEAK_ATTRIBUTE;
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 if (&__mmap) return (uptr)__mmap(addr, length, prot, flags, fd, offset);
106 return (uptr)mmap(addr, length, prot, flags, fd, offset);
109 uptr internal_munmap(void *addr, uptr length) {
110 if (&__munmap) return __munmap(addr, length);
111 return munmap(addr, length);
114 int internal_mprotect(void *addr, uptr length, int prot) {
115 return mprotect(addr, length, prot);
118 uptr internal_close(fd_t fd) {
122 uptr internal_open(const char *filename, int flags) {
123 return open(filename, flags);
126 uptr internal_open(const char *filename, int flags, u32 mode) {
127 return open(filename, flags, mode);
130 uptr internal_read(fd_t fd, void *buf, uptr count) {
131 return read(fd, buf, count);
134 uptr internal_write(fd_t fd, const void *buf, uptr count) {
135 return write(fd, buf, count);
138 uptr internal_stat(const char *path, void *buf) {
139 return stat(path, (struct stat *)buf);
142 uptr internal_lstat(const char *path, void *buf) {
143 return lstat(path, (struct stat *)buf);
146 uptr internal_fstat(fd_t fd, void *buf) {
147 return fstat(fd, (struct stat *)buf);
150 uptr internal_filesize(fd_t fd) {
152 if (internal_fstat(fd, &st))
154 return (uptr)st.st_size;
157 uptr internal_dup2(int oldfd, int newfd) {
158 return dup2(oldfd, newfd);
161 uptr internal_readlink(const char *path, char *buf, uptr bufsize) {
162 return readlink(path, buf, bufsize);
165 uptr internal_unlink(const char *path) {
169 uptr internal_sched_yield() {
170 return sched_yield();
173 void internal__exit(int exitcode) {
177 unsigned int internal_sleep(unsigned int seconds) {
178 return sleep(seconds);
181 uptr internal_getpid() {
185 int internal_sigaction(int signum, const void *act, void *oldact) {
186 return sigaction(signum,
187 (struct sigaction *)act, (struct sigaction *)oldact);
190 void internal_sigfillset(__sanitizer_sigset_t *set) { sigfillset(set); }
192 uptr internal_sigprocmask(int how, __sanitizer_sigset_t *set,
193 __sanitizer_sigset_t *oldset) {
194 return sigprocmask(how, set, oldset);
197 // Doesn't call pthread_atfork() handlers (but not available on 10.6).
198 extern "C" pid_t __fork(void) SANITIZER_WEAK_ATTRIBUTE;
200 int internal_fork() {
206 int internal_forkpty(int *amaster) {
208 if (openpty(&master, &slave, nullptr, nullptr, nullptr) == -1) return -1;
209 int pid = internal_fork();
217 if (login_tty(slave) != 0) {
218 // We already forked, there's not much we can do. Let's quit.
219 Report("login_tty failed (errno %d)\n", errno);
229 uptr internal_rename(const char *oldpath, const char *newpath) {
230 return rename(oldpath, newpath);
233 uptr internal_ftruncate(fd_t fd, uptr size) {
234 return ftruncate(fd, size);
237 uptr internal_execve(const char *filename, char *const argv[],
238 char *const envp[]) {
239 return execve(filename, argv, envp);
242 uptr internal_waitpid(int pid, int *status, int options) {
243 return waitpid(pid, status, options);
246 // ----------------- sanitizer_common.h
247 bool FileExists(const char *filename) {
249 if (stat(filename, &st))
251 // Sanity check: filename is a regular file.
252 return S_ISREG(st.st_mode);
257 pthread_threadid_np(nullptr, &tid);
261 void GetThreadStackTopAndBottom(bool at_initialization, uptr *stack_top,
262 uptr *stack_bottom) {
265 uptr stacksize = pthread_get_stacksize_np(pthread_self());
266 // pthread_get_stacksize_np() returns an incorrect stack size for the main
267 // thread on Mavericks. See
268 // https://github.com/google/sanitizers/issues/261
269 if ((GetMacosVersion() >= MACOS_VERSION_MAVERICKS) && at_initialization &&
270 stacksize == (1 << 19)) {
272 CHECK_EQ(getrlimit(RLIMIT_STACK, &rl), 0);
273 // Most often rl.rlim_cur will be the desired 8M.
274 if (rl.rlim_cur < kMaxThreadStackSize) {
275 stacksize = rl.rlim_cur;
277 stacksize = kMaxThreadStackSize;
280 void *stackaddr = pthread_get_stackaddr_np(pthread_self());
281 *stack_top = (uptr)stackaddr;
282 *stack_bottom = *stack_top - stacksize;
285 char **GetEnviron() {
287 char ***env_ptr = _NSGetEnviron();
289 Report("_NSGetEnviron() returned NULL. Please make sure __asan_init() is "
290 "called after libSystem_initializer().\n");
293 char **environ = *env_ptr;
299 const char *GetEnv(const char *name) {
300 char **env = GetEnviron();
301 uptr name_len = internal_strlen(name);
303 uptr len = internal_strlen(*env);
304 if (len > name_len) {
305 const char *p = *env;
306 if (!internal_memcmp(p, name, name_len) &&
307 p[name_len] == '=') { // Match.
308 return *env + name_len + 1; // String starting after =.
316 uptr ReadBinaryName(/*out*/char *buf, uptr buf_len) {
317 CHECK_LE(kMaxPathLength, buf_len);
319 // On OS X the executable path is saved to the stack by dyld. Reading it
320 // from there is much faster than calling dladdr, especially for large
321 // binaries with symbols.
322 InternalScopedString exe_path(kMaxPathLength);
323 uint32_t size = exe_path.size();
324 if (_NSGetExecutablePath(exe_path.data(), &size) == 0 &&
325 realpath(exe_path.data(), buf) != 0) {
326 return internal_strlen(buf);
331 uptr ReadLongProcessName(/*out*/char *buf, uptr buf_len) {
332 return ReadBinaryName(buf, buf_len);
340 return sysconf(_SC_PAGESIZE);
343 BlockingMutex::BlockingMutex() {
344 internal_memset(this, 0, sizeof(*this));
347 void BlockingMutex::Lock() {
348 CHECK(sizeof(OSSpinLock) <= sizeof(opaque_storage_));
349 CHECK_EQ(OS_SPINLOCK_INIT, 0);
351 OSSpinLockLock((OSSpinLock*)&opaque_storage_);
354 void BlockingMutex::Unlock() {
355 OSSpinLockUnlock((OSSpinLock*)&opaque_storage_);
358 void BlockingMutex::CheckLocked() {
359 CHECK_NE(*(OSSpinLock*)&opaque_storage_, 0);
375 #if defined(__x86_64__)
376 asm("movq %%gs:0,%0" : "=r"(segbase));
377 #elif defined(__i386__)
378 asm("movl %%gs:0,%0" : "=r"(segbase));
383 // The size of the tls on darwin does not appear to be well documented,
384 // however the vm memory map suggests that it is 1024 uptrs in size,
385 // with a size of 0x2000 bytes on x86_64 and 0x1000 bytes on i386.
387 #if defined(__x86_64__) || defined(__i386__)
388 return 1024 * sizeof(uptr);
394 void GetThreadStackAndTls(bool main, uptr *stk_addr, uptr *stk_size,
395 uptr *tls_addr, uptr *tls_size) {
397 uptr stack_top, stack_bottom;
398 GetThreadStackTopAndBottom(main, &stack_top, &stack_bottom);
399 *stk_addr = stack_bottom;
400 *stk_size = stack_top - stack_bottom;
401 *tls_addr = TlsBaseAddr();
402 *tls_size = TlsSize();
411 void ListOfModules::init() {
413 MemoryMappingLayout memory_mapping(false);
414 memory_mapping.DumpListOfModules(&modules_);
417 static HandleSignalMode GetHandleSignalModeImpl(int signum) {
420 return common_flags()->handle_abort;
422 return common_flags()->handle_sigill;
424 return common_flags()->handle_sigfpe;
426 return common_flags()->handle_segv;
428 return common_flags()->handle_sigbus;
430 return kHandleSignalNo;
433 HandleSignalMode GetHandleSignalMode(int signum) {
434 // Handling fatal signals on watchOS and tvOS devices is disallowed.
435 if ((SANITIZER_WATCHOS || SANITIZER_TVOS) && !(SANITIZER_IOSSIM))
436 return kHandleSignalNo;
437 HandleSignalMode result = GetHandleSignalModeImpl(signum);
438 if (result == kHandleSignalYes && !common_flags()->allow_user_segv_handler)
439 return kHandleSignalExclusive;
443 MacosVersion cached_macos_version = MACOS_VERSION_UNINITIALIZED;
445 MacosVersion GetMacosVersionInternal() {
446 int mib[2] = { CTL_KERN, KERN_OSRELEASE };
448 uptr len = 0, maxlen = sizeof(version) / sizeof(version[0]);
449 for (uptr i = 0; i < maxlen; i++) version[i] = '\0';
450 // Get the version length.
451 CHECK_NE(sysctl(mib, 2, 0, &len, 0, 0), -1);
452 CHECK_LT(len, maxlen);
453 CHECK_NE(sysctl(mib, 2, version, &len, 0, 0), -1);
454 switch (version[0]) {
455 case '9': return MACOS_VERSION_LEOPARD;
457 switch (version[1]) {
458 case '0': return MACOS_VERSION_SNOW_LEOPARD;
459 case '1': return MACOS_VERSION_LION;
460 case '2': return MACOS_VERSION_MOUNTAIN_LION;
461 case '3': return MACOS_VERSION_MAVERICKS;
462 case '4': return MACOS_VERSION_YOSEMITE;
464 if (IsDigit(version[1]))
465 return MACOS_VERSION_UNKNOWN_NEWER;
467 return MACOS_VERSION_UNKNOWN;
470 default: return MACOS_VERSION_UNKNOWN;
474 MacosVersion GetMacosVersion() {
475 atomic_uint32_t *cache =
476 reinterpret_cast<atomic_uint32_t*>(&cached_macos_version);
477 MacosVersion result =
478 static_cast<MacosVersion>(atomic_load(cache, memory_order_acquire));
479 if (result == MACOS_VERSION_UNINITIALIZED) {
480 result = GetMacosVersionInternal();
481 atomic_store(cache, result, memory_order_release);
486 bool PlatformHasDifferentMemcpyAndMemmove() {
487 // On OS X 10.7 memcpy() and memmove() are both resolved
488 // into memmove$VARIANT$sse42.
489 // See also https://github.com/google/sanitizers/issues/34.
490 // TODO(glider): need to check dynamically that memcpy() and memmove() are
491 // actually the same function.
492 return GetMacosVersion() == MACOS_VERSION_SNOW_LEOPARD;
496 struct task_basic_info info;
497 unsigned count = TASK_BASIC_INFO_COUNT;
498 kern_return_t result =
499 task_info(mach_task_self(), TASK_BASIC_INFO, (task_info_t)&info, &count);
500 if (UNLIKELY(result != KERN_SUCCESS)) {
501 Report("Cannot get task info. Error: %d\n", result);
504 return info.resident_size;
507 void *internal_start_thread(void(*func)(void *arg), void *arg) {
508 // Start the thread with signals blocked, otherwise it can steal user signals.
509 __sanitizer_sigset_t set, old;
510 internal_sigfillset(&set);
511 internal_sigprocmask(SIG_SETMASK, &set, &old);
513 pthread_create(&th, 0, (void*(*)(void *arg))func, arg);
514 internal_sigprocmask(SIG_SETMASK, &old, 0);
518 void internal_join_thread(void *th) { pthread_join((pthread_t)th, 0); }
521 static BlockingMutex syslog_lock(LINKER_INITIALIZED);
524 void WriteOneLineToSyslog(const char *s) {
526 syslog_lock.CheckLocked();
527 asl_log(nullptr, nullptr, ASL_LEVEL_ERR, "%s", s);
531 void LogMessageOnPrintf(const char *str) {
532 // Log all printf output to CrashLog.
533 if (common_flags()->abort_on_error)
534 CRAppendCrashLogMessage(str);
537 void LogFullErrorReport(const char *buffer) {
539 // Log with os_trace. This will make it into the crash log.
540 #if SANITIZER_OS_TRACE
541 if (GetMacosVersion() >= MACOS_VERSION_YOSEMITE) {
542 // os_trace requires the message (format parameter) to be a string literal.
543 if (internal_strncmp(SanitizerToolName, "AddressSanitizer",
544 sizeof("AddressSanitizer") - 1) == 0)
545 os_trace("Address Sanitizer reported a failure.");
546 else if (internal_strncmp(SanitizerToolName, "UndefinedBehaviorSanitizer",
547 sizeof("UndefinedBehaviorSanitizer") - 1) == 0)
548 os_trace("Undefined Behavior Sanitizer reported a failure.");
549 else if (internal_strncmp(SanitizerToolName, "ThreadSanitizer",
550 sizeof("ThreadSanitizer") - 1) == 0)
551 os_trace("Thread Sanitizer reported a failure.");
553 os_trace("Sanitizer tool reported a failure.");
555 if (common_flags()->log_to_syslog)
556 os_trace("Consult syslog for more information.");
561 // The logging on OS X may call pthread_create so we need the threading
562 // environment to be fully initialized. Also, this should never be called when
563 // holding the thread registry lock since that may result in a deadlock. If
564 // the reporting thread holds the thread registry mutex, and asl_log waits
565 // for GCD to dispatch a new thread, the process will deadlock, because the
566 // pthread_create wrapper needs to acquire the lock as well.
567 BlockingMutexLock l(&syslog_lock);
568 if (common_flags()->log_to_syslog)
569 WriteToSyslog(buffer);
571 // The report is added to CrashLog as part of logging all of Printf output.
575 SignalContext::WriteFlag SignalContext::GetWriteFlag(void *context) {
576 #if defined(__x86_64__) || defined(__i386__)
577 ucontext_t *ucontext = static_cast<ucontext_t*>(context);
578 return ucontext->uc_mcontext->__es.__err & 2 /*T_PF_WRITE*/ ? WRITE : READ;
584 void GetPcSpBp(void *context, uptr *pc, uptr *sp, uptr *bp) {
585 ucontext_t *ucontext = (ucontext_t*)context;
586 # if defined(__aarch64__)
587 *pc = ucontext->uc_mcontext->__ss.__pc;
588 # if defined(__IPHONE_8_0) && __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_8_0
589 *bp = ucontext->uc_mcontext->__ss.__fp;
591 *bp = ucontext->uc_mcontext->__ss.__lr;
593 *sp = ucontext->uc_mcontext->__ss.__sp;
594 # elif defined(__x86_64__)
595 *pc = ucontext->uc_mcontext->__ss.__rip;
596 *bp = ucontext->uc_mcontext->__ss.__rbp;
597 *sp = ucontext->uc_mcontext->__ss.__rsp;
598 # elif defined(__arm__)
599 *pc = ucontext->uc_mcontext->__ss.__pc;
600 *bp = ucontext->uc_mcontext->__ss.__r[7];
601 *sp = ucontext->uc_mcontext->__ss.__sp;
602 # elif defined(__i386__)
603 *pc = ucontext->uc_mcontext->__ss.__eip;
604 *bp = ucontext->uc_mcontext->__ss.__ebp;
605 *sp = ucontext->uc_mcontext->__ss.__esp;
607 # error "Unknown architecture"
612 static const char kDyldInsertLibraries[] = "DYLD_INSERT_LIBRARIES";
613 LowLevelAllocator allocator_for_env;
615 // Change the value of the env var |name|, leaking the original value.
616 // If |name_value| is NULL, the variable is deleted from the environment,
617 // otherwise the corresponding "NAME=value" string is replaced with
619 void LeakyResetEnv(const char *name, const char *name_value) {
620 char **env = GetEnviron();
621 uptr name_len = internal_strlen(name);
623 uptr len = internal_strlen(*env);
624 if (len > name_len) {
625 const char *p = *env;
626 if (!internal_memcmp(p, name, name_len) && p[name_len] == '=') {
629 // Replace the old value with the new one.
630 *env = const_cast<char*>(name_value);
632 // Shift the subsequent pointers back.
644 SANITIZER_WEAK_CXX_DEFAULT_IMPL
645 bool ReexecDisabled() {
649 extern "C" SANITIZER_WEAK_ATTRIBUTE double dyldVersionNumber;
650 static const double kMinDyldVersionWithAutoInterposition = 360.0;
652 bool DyldNeedsEnvVariable() {
653 // Although sanitizer support was added to LLVM on OS X 10.7+, GCC users
654 // still may want use them on older systems. On older Darwin platforms, dyld
655 // doesn't export dyldVersionNumber symbol and we simply return true.
656 if (!&dyldVersionNumber) return true;
657 // If running on OS X 10.11+ or iOS 9.0+, dyld will interpose even if
658 // DYLD_INSERT_LIBRARIES is not set. However, checking OS version via
659 // GetMacosVersion() doesn't work for the simulator. Let's instead check
660 // `dyldVersionNumber`, which is exported by dyld, against a known version
661 // number from the first OS release where this appeared.
662 return dyldVersionNumber < kMinDyldVersionWithAutoInterposition;
666 if (ReexecDisabled()) return;
668 // Make sure the dynamic runtime library is preloaded so that the
669 // wrappers work. If it is not, set DYLD_INSERT_LIBRARIES and re-exec
672 RAW_CHECK(dladdr((void*)((uptr)&__sanitizer_report_error_summary), &info));
673 char *dyld_insert_libraries =
674 const_cast<char*>(GetEnv(kDyldInsertLibraries));
675 uptr old_env_len = dyld_insert_libraries ?
676 internal_strlen(dyld_insert_libraries) : 0;
677 uptr fname_len = internal_strlen(info.dli_fname);
678 const char *dylib_name = StripModuleName(info.dli_fname);
679 uptr dylib_name_len = internal_strlen(dylib_name);
681 bool lib_is_in_env = dyld_insert_libraries &&
682 internal_strstr(dyld_insert_libraries, dylib_name);
683 if (DyldNeedsEnvVariable() && !lib_is_in_env) {
684 // DYLD_INSERT_LIBRARIES is not set or does not contain the runtime
686 InternalScopedString program_name(1024);
687 uint32_t buf_size = program_name.size();
688 _NSGetExecutablePath(program_name.data(), &buf_size);
689 char *new_env = const_cast<char*>(info.dli_fname);
690 if (dyld_insert_libraries) {
691 // Append the runtime dylib name to the existing value of
692 // DYLD_INSERT_LIBRARIES.
693 new_env = (char*)allocator_for_env.Allocate(old_env_len + fname_len + 2);
694 internal_strncpy(new_env, dyld_insert_libraries, old_env_len);
695 new_env[old_env_len] = ':';
696 // Copy fname_len and add a trailing zero.
697 internal_strncpy(new_env + old_env_len + 1, info.dli_fname,
699 // Ok to use setenv() since the wrappers don't depend on the value of
701 setenv(kDyldInsertLibraries, new_env, /*overwrite*/1);
703 // Set DYLD_INSERT_LIBRARIES equal to the runtime dylib name.
704 setenv(kDyldInsertLibraries, info.dli_fname, /*overwrite*/0);
706 VReport(1, "exec()-ing the program with\n");
707 VReport(1, "%s=%s\n", kDyldInsertLibraries, new_env);
708 VReport(1, "to enable wrappers.\n");
709 execv(program_name.data(), *_NSGetArgv());
711 // We get here only if execv() failed.
712 Report("ERROR: The process is launched without DYLD_INSERT_LIBRARIES, "
713 "which is required for the sanitizer to work. We tried to set the "
714 "environment variable and re-execute itself, but execv() failed, "
715 "possibly because of sandbox restrictions. Make sure to launch the "
716 "executable with:\n%s=%s\n", kDyldInsertLibraries, new_env);
717 RAW_CHECK("execv failed" && 0);
720 // Verify that interceptors really work. We'll use dlsym to locate
721 // "pthread_create", if interceptors are working, it should really point to
722 // "wrap_pthread_create" within our own dylib.
723 Dl_info info_pthread_create;
724 void *dlopen_addr = dlsym(RTLD_DEFAULT, "pthread_create");
725 RAW_CHECK(dladdr(dlopen_addr, &info_pthread_create));
726 if (internal_strcmp(info.dli_fname, info_pthread_create.dli_fname) != 0) {
728 "ERROR: Interceptors are not working. This may be because %s is "
729 "loaded too late (e.g. via dlopen). Please launch the executable "
731 SanitizerToolName, kDyldInsertLibraries, info.dli_fname);
732 RAW_CHECK("interceptors not installed" && 0);
738 // DYLD_INSERT_LIBRARIES is set and contains the runtime library. Let's remove
739 // the dylib from the environment variable, because interceptors are installed
740 // and we don't want our children to inherit the variable.
742 uptr env_name_len = internal_strlen(kDyldInsertLibraries);
743 // Allocate memory to hold the previous env var name, its value, the '='
744 // sign and the '\0' char.
745 char *new_env = (char*)allocator_for_env.Allocate(
746 old_env_len + 2 + env_name_len);
748 internal_memset(new_env, '\0', old_env_len + 2 + env_name_len);
749 internal_strncpy(new_env, kDyldInsertLibraries, env_name_len);
750 new_env[env_name_len] = '=';
751 char *new_env_pos = new_env + env_name_len + 1;
753 // Iterate over colon-separated pieces of |dyld_insert_libraries|.
754 char *piece_start = dyld_insert_libraries;
755 char *piece_end = NULL;
756 char *old_env_end = dyld_insert_libraries + old_env_len;
758 if (piece_start[0] == ':') piece_start++;
759 piece_end = internal_strchr(piece_start, ':');
760 if (!piece_end) piece_end = dyld_insert_libraries + old_env_len;
761 if ((uptr)(piece_start - dyld_insert_libraries) > old_env_len) break;
762 uptr piece_len = piece_end - piece_start;
764 char *filename_start =
765 (char *)internal_memrchr(piece_start, '/', piece_len);
766 uptr filename_len = piece_len;
767 if (filename_start) {
769 filename_len = piece_len - (filename_start - piece_start);
771 filename_start = piece_start;
774 // If the current piece isn't the runtime library name,
775 // append it to new_env.
776 if ((dylib_name_len != filename_len) ||
777 (internal_memcmp(filename_start, dylib_name, dylib_name_len) != 0)) {
778 if (new_env_pos != new_env + env_name_len + 1) {
779 new_env_pos[0] = ':';
782 internal_strncpy(new_env_pos, piece_start, piece_len);
783 new_env_pos += piece_len;
785 // Move on to the next piece.
786 piece_start = piece_end;
787 } while (piece_start < old_env_end);
789 // Can't use setenv() here, because it requires the allocator to be
791 // FIXME: instead of filtering DYLD_INSERT_LIBRARIES here, do it in
792 // a separate function called after InitializeAllocator().
793 if (new_env_pos == new_env + env_name_len + 1) new_env = NULL;
794 LeakyResetEnv(kDyldInsertLibraries, new_env);
796 #endif // SANITIZER_GO
799 return *_NSGetArgv();
802 uptr FindAvailableMemoryRange(uptr shadow_size,
805 typedef vm_region_submap_short_info_data_64_t RegionInfo;
806 enum { kRegionInfoSize = VM_REGION_SUBMAP_SHORT_INFO_COUNT_64 };
807 // Start searching for available memory region past PAGEZERO, which is
808 // 4KB on 32-bit and 4GB on 64-bit.
809 mach_vm_address_t start_address =
810 (SANITIZER_WORDSIZE == 32) ? 0x000000001000 : 0x000100000000;
812 mach_vm_address_t address = start_address;
813 mach_vm_address_t free_begin = start_address;
814 kern_return_t kr = KERN_SUCCESS;
815 while (kr == KERN_SUCCESS) {
816 mach_vm_size_t vmsize = 0;
819 mach_msg_type_number_t count = kRegionInfoSize;
820 kr = mach_vm_region_recurse(mach_task_self(), &address, &vmsize, &depth,
821 (vm_region_info_t)&vminfo, &count);
822 if (free_begin != address) {
823 // We found a free region [free_begin..address-1].
824 uptr shadow_address = RoundUpTo((uptr)free_begin + left_padding,
826 if (shadow_address + shadow_size < (uptr)address) {
827 return shadow_address;
830 // Move to the next region.
832 free_begin = address;
835 // We looked at all free regions and could not find one large enough.
839 // FIXME implement on this platform.
840 void GetMemoryProfile(fill_profile_f cb, uptr *stats, uptr stats_size) { }
842 void SignalContext::DumpAllRegisters(void *context) {
843 Report("Register values:\n");
845 ucontext_t *ucontext = (ucontext_t*)context;
846 # define DUMPREG64(r) \
847 Printf("%s = 0x%016llx ", #r, ucontext->uc_mcontext->__ss.__ ## r);
848 # define DUMPREG32(r) \
849 Printf("%s = 0x%08x ", #r, ucontext->uc_mcontext->__ss.__ ## r);
850 # define DUMPREG_(r) Printf(" "); DUMPREG(r);
851 # define DUMPREG__(r) Printf(" "); DUMPREG(r);
852 # define DUMPREG___(r) Printf(" "); DUMPREG(r);
854 # if defined(__x86_64__)
855 # define DUMPREG(r) DUMPREG64(r)
856 DUMPREG(rax); DUMPREG(rbx); DUMPREG(rcx); DUMPREG(rdx); Printf("\n");
857 DUMPREG(rdi); DUMPREG(rsi); DUMPREG(rbp); DUMPREG(rsp); Printf("\n");
858 DUMPREG_(r8); DUMPREG_(r9); DUMPREG(r10); DUMPREG(r11); Printf("\n");
859 DUMPREG(r12); DUMPREG(r13); DUMPREG(r14); DUMPREG(r15); Printf("\n");
860 # elif defined(__i386__)
861 # define DUMPREG(r) DUMPREG32(r)
862 DUMPREG(eax); DUMPREG(ebx); DUMPREG(ecx); DUMPREG(edx); Printf("\n");
863 DUMPREG(edi); DUMPREG(esi); DUMPREG(ebp); DUMPREG(esp); Printf("\n");
864 # elif defined(__aarch64__)
865 # define DUMPREG(r) DUMPREG64(r)
866 DUMPREG_(x[0]); DUMPREG_(x[1]); DUMPREG_(x[2]); DUMPREG_(x[3]); Printf("\n");
867 DUMPREG_(x[4]); DUMPREG_(x[5]); DUMPREG_(x[6]); DUMPREG_(x[7]); Printf("\n");
868 DUMPREG_(x[8]); DUMPREG_(x[9]); DUMPREG(x[10]); DUMPREG(x[11]); Printf("\n");
869 DUMPREG(x[12]); DUMPREG(x[13]); DUMPREG(x[14]); DUMPREG(x[15]); Printf("\n");
870 DUMPREG(x[16]); DUMPREG(x[17]); DUMPREG(x[18]); DUMPREG(x[19]); Printf("\n");
871 DUMPREG(x[20]); DUMPREG(x[21]); DUMPREG(x[22]); DUMPREG(x[23]); Printf("\n");
872 DUMPREG(x[24]); DUMPREG(x[25]); DUMPREG(x[26]); DUMPREG(x[27]); Printf("\n");
873 DUMPREG(x[28]); DUMPREG___(fp); DUMPREG___(lr); DUMPREG___(sp); Printf("\n");
874 # elif defined(__arm__)
875 # define DUMPREG(r) DUMPREG32(r)
876 DUMPREG_(r[0]); DUMPREG_(r[1]); DUMPREG_(r[2]); DUMPREG_(r[3]); Printf("\n");
877 DUMPREG_(r[4]); DUMPREG_(r[5]); DUMPREG_(r[6]); DUMPREG_(r[7]); Printf("\n");
878 DUMPREG_(r[8]); DUMPREG_(r[9]); DUMPREG(r[10]); DUMPREG(r[11]); Printf("\n");
879 DUMPREG(r[12]); DUMPREG___(sp); DUMPREG___(lr); DUMPREG___(pc); Printf("\n");
881 # error "Unknown architecture"
892 static inline bool CompareBaseAddress(const LoadedModule &a,
893 const LoadedModule &b) {
894 return a.base_address() < b.base_address();
897 void FormatUUID(char *out, uptr size, const u8 *uuid) {
898 internal_snprintf(out, size,
899 "<%02X%02X%02X%02X-%02X%02X-%02X%02X-%02X%02X-"
900 "%02X%02X%02X%02X%02X%02X>",
901 uuid[0], uuid[1], uuid[2], uuid[3], uuid[4], uuid[5],
902 uuid[6], uuid[7], uuid[8], uuid[9], uuid[10], uuid[11],
903 uuid[12], uuid[13], uuid[14], uuid[15]);
906 void PrintModuleMap() {
907 Printf("Process module map:\n");
908 MemoryMappingLayout memory_mapping(false);
909 InternalMmapVector<LoadedModule> modules(/*initial_capacity*/ 128);
910 memory_mapping.DumpListOfModules(&modules);
911 InternalSort(&modules, modules.size(), CompareBaseAddress);
912 for (uptr i = 0; i < modules.size(); ++i) {
914 FormatUUID(uuid_str, sizeof(uuid_str), modules[i].uuid());
915 Printf("0x%zx-0x%zx %s (%s) %s\n", modules[i].base_address(),
916 modules[i].max_executable_address(), modules[i].full_name(),
917 ModuleArchToString(modules[i].arch()), uuid_str);
919 Printf("End of module map.\n");
922 void CheckNoDeepBind(const char *filename, int flag) {
926 // FIXME: implement on this platform.
927 bool GetRandom(void *buffer, uptr length) {
931 } // namespace __sanitizer
933 #endif // SANITIZER_MAC