| // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| #include "vm/globals.h" |
| #if defined(DART_HOST_OS_MACOS) |
| |
| #include "vm/os.h" |
| |
| #include <dlfcn.h> // NOLINT |
| #include <errno.h> // NOLINT |
| #include <limits.h> // NOLINT |
| #include <mach-o/loader.h> // NOLINT |
| #include <mach/clock.h> // NOLINT |
| #include <mach/mach.h> // NOLINT |
| #include <mach/mach_time.h> // NOLINT |
| #include <sys/resource.h> // NOLINT |
| #include <sys/time.h> // NOLINT |
| #include <unistd.h> // NOLINT |
| #if DART_HOST_OS_IOS |
| #include <syslog.h> // NOLINT |
| #endif |
| |
| #include "platform/utils.h" |
| #include "vm/image_snapshot.h" |
| #include "vm/isolate.h" |
| #include "vm/timeline.h" |
| #include "vm/zone.h" |
| |
| namespace dart { |
| |
| intptr_t OS::ProcessId() { |
| return static_cast<intptr_t>(getpid()); |
| } |
| |
| static bool LocalTime(int64_t seconds_since_epoch, tm* tm_result) { |
| time_t seconds = static_cast<time_t>(seconds_since_epoch); |
| if (seconds != seconds_since_epoch) return false; |
| struct tm* error_code = localtime_r(&seconds, tm_result); |
| return error_code != nullptr; |
| } |
| |
| const char* OS::GetTimeZoneName(int64_t seconds_since_epoch) { |
| tm decomposed; |
| bool succeeded = LocalTime(seconds_since_epoch, &decomposed); |
| // If unsuccessful, return an empty string like V8 does. |
| return (succeeded && (decomposed.tm_zone != nullptr)) ? decomposed.tm_zone |
| : ""; |
| } |
| |
| int OS::GetTimeZoneOffsetInSeconds(int64_t seconds_since_epoch) { |
| tm decomposed; |
| bool succeeded = LocalTime(seconds_since_epoch, &decomposed); |
| // Even if the offset was 24 hours it would still easily fit into 32 bits. |
| // If unsuccessful, return zero like V8 does. |
| return succeeded ? static_cast<int>(decomposed.tm_gmtoff) : 0; |
| } |
| |
| int64_t OS::GetCurrentTimeMillis() { |
| return GetCurrentTimeMicros() / 1000; |
| } |
| |
| int64_t OS::GetCurrentTimeMicros() { |
| // gettimeofday has microsecond resolution. |
| struct timeval tv; |
| if (gettimeofday(&tv, nullptr) < 0) { |
| UNREACHABLE(); |
| return 0; |
| } |
| return (static_cast<int64_t>(tv.tv_sec) * 1000000) + tv.tv_usec; |
| } |
| |
| int64_t OS::GetCurrentMonotonicTicks() { |
| return clock_gettime_nsec_np(CLOCK_MONOTONIC_RAW); |
| } |
| |
| int64_t OS::GetCurrentMonotonicFrequency() { |
| return kNanosecondsPerSecond; |
| } |
| |
| int64_t OS::GetCurrentMonotonicMicros() { |
| ASSERT(GetCurrentMonotonicFrequency() == kNanosecondsPerSecond); |
| return GetCurrentMonotonicTicks() / kNanosecondsPerMicrosecond; |
| } |
| |
| int64_t OS::GetCurrentThreadCPUMicros() { |
| return clock_gettime_nsec_np(CLOCK_THREAD_CPUTIME_ID) / |
| kNanosecondsPerMicrosecond; |
| } |
| |
| int64_t OS::GetCurrentMonotonicMicrosForTimeline() { |
| #if defined(SUPPORT_TIMELINE) |
| if (Timeline::recorder_discards_clock_values()) return -1; |
| return GetCurrentMonotonicMicros(); |
| #else |
| return -1; |
| #endif |
| } |
| |
| intptr_t OS::ActivationFrameAlignment() { |
| #if DART_HOST_OS_IOS |
| #if TARGET_ARCH_ARM |
| // Even if we generate code that maintains a stronger alignment, we cannot |
| // assert the stronger stack alignment because C++ code will not maintain it. |
| return 8; |
| #elif TARGET_ARCH_ARM64 |
| return 16; |
| #elif TARGET_ARCH_IA32 |
| return 16; // iOS simulator |
| #elif TARGET_ARCH_X64 |
| return 16; // iOS simulator |
| #else |
| #error Unimplemented |
| #endif |
| #else // DART_HOST_OS_IOS |
| // OS X activation frames must be 16 byte-aligned; see "Mac OS X ABI |
| // Function Call Guide". |
| return 16; |
| #endif // DART_HOST_OS_IOS |
| } |
| |
| int OS::NumberOfAvailableProcessors() { |
| return sysconf(_SC_NPROCESSORS_ONLN); |
| } |
| |
| void OS::Sleep(int64_t millis) { |
| int64_t micros = millis * kMicrosecondsPerMillisecond; |
| SleepMicros(micros); |
| } |
| |
| void OS::SleepMicros(int64_t micros) { |
| struct timespec req; // requested. |
| struct timespec rem; // remainder. |
| int64_t seconds = micros / kMicrosecondsPerSecond; |
| if (seconds > kMaxInt32) { |
| // Avoid truncation of overly large sleep values. |
| seconds = kMaxInt32; |
| } |
| micros = micros - seconds * kMicrosecondsPerSecond; |
| int64_t nanos = micros * kNanosecondsPerMicrosecond; |
| req.tv_sec = static_cast<int32_t>(seconds); |
| req.tv_nsec = static_cast<long>(nanos); // NOLINT (long used in timespec). |
| while (true) { |
| int r = nanosleep(&req, &rem); |
| if (r == 0) { |
| break; |
| } |
| // We should only ever see an interrupt error. |
| ASSERT(errno == EINTR); |
| // Copy remainder into requested and repeat. |
| req = rem; |
| } |
| } |
| |
| void OS::DebugBreak() { |
| __builtin_trap(); |
| } |
| |
| DART_NOINLINE uintptr_t OS::GetProgramCounter() { |
| return reinterpret_cast<uintptr_t>( |
| __builtin_extract_return_addr(__builtin_return_address(0))); |
| } |
| |
| void OS::Print(const char* format, ...) { |
| #if DART_HOST_OS_IOS |
| va_list args; |
| va_start(args, format); |
| vsyslog(LOG_INFO, format, args); |
| va_end(args); |
| #else |
| va_list args; |
| va_start(args, format); |
| VFPrint(stdout, format, args); |
| va_end(args); |
| #endif |
| } |
| |
| void OS::VFPrint(FILE* stream, const char* format, va_list args) { |
| vfprintf(stream, format, args); |
| fflush(stream); |
| } |
| |
| char* OS::SCreate(Zone* zone, const char* format, ...) { |
| va_list args; |
| va_start(args, format); |
| char* buffer = VSCreate(zone, format, args); |
| va_end(args); |
| return buffer; |
| } |
| |
| char* OS::VSCreate(Zone* zone, const char* format, va_list args) { |
| // Measure. |
| va_list measure_args; |
| va_copy(measure_args, args); |
| intptr_t len = Utils::VSNPrint(nullptr, 0, format, measure_args); |
| va_end(measure_args); |
| |
| char* buffer; |
| if (zone) { |
| buffer = zone->Alloc<char>(len + 1); |
| } else { |
| buffer = reinterpret_cast<char*>(malloc(len + 1)); |
| } |
| ASSERT(buffer != nullptr); |
| |
| // Print. |
| va_list print_args; |
| va_copy(print_args, args); |
| Utils::VSNPrint(buffer, len + 1, format, print_args); |
| va_end(print_args); |
| return buffer; |
| } |
| |
| bool OS::StringToInt64(const char* str, int64_t* value) { |
| ASSERT(str != nullptr && strlen(str) > 0 && value != nullptr); |
| int32_t base = 10; |
| char* endptr; |
| int i = 0; |
| if (str[0] == '-') { |
| i = 1; |
| } else if (str[0] == '+') { |
| i = 1; |
| } |
| if ((str[i] == '0') && (str[i + 1] == 'x' || str[i + 1] == 'X') && |
| (str[i + 2] != '\0')) { |
| base = 16; |
| } |
| errno = 0; |
| if (base == 16) { |
| // Unsigned 64-bit hexadecimal integer literals are allowed but |
| // immediately interpreted as signed 64-bit integers. |
| *value = static_cast<int64_t>(strtoull(str, &endptr, base)); |
| } else { |
| *value = strtoll(str, &endptr, base); |
| } |
| return ((errno == 0) && (endptr != str) && (*endptr == 0)); |
| } |
| |
| void OS::RegisterCodeObservers() {} |
| |
| void OS::PrintErr(const char* format, ...) { |
| #if DART_HOST_OS_IOS |
| va_list args; |
| va_start(args, format); |
| vsyslog(LOG_ERR, format, args); |
| va_end(args); |
| #else |
| va_list args; |
| va_start(args, format); |
| VFPrint(stderr, format, args); |
| va_end(args); |
| #endif |
| } |
| |
| void OS::Init() { |
| // See https://github.com/dart-lang/sdk/issues/29539 |
| // This is a workaround for a macos bug, we eagerly call localtime_r so that |
| // libnotify is initialized early before any fork happens. |
| struct timeval tv; |
| if (gettimeofday(&tv, nullptr) < 0) { |
| FATAL("gettimeofday returned an error (%s)\n", strerror(errno)); |
| return; |
| } |
| tm decomposed; |
| struct tm* error_code = localtime_r(&(tv.tv_sec), &decomposed); |
| if (error_code == nullptr) { |
| FATAL("localtime_r returned an error (%s)\n", strerror(errno)); |
| return; |
| } |
| } |
| |
| void OS::Cleanup() {} |
| |
| void OS::PrepareToAbort() {} |
| |
| void OS::Abort() { |
| PrepareToAbort(); |
| abort(); |
| } |
| |
| void OS::Exit(int code) { |
| exit(code); |
| } |
| |
| OS::BuildId OS::GetAppBuildId(const uint8_t* snapshot_instructions) { |
| // First return the build ID information from the instructions image if |
| // available. |
| const Image instructions_image(snapshot_instructions); |
| if (auto* const image_build_id = instructions_image.build_id()) { |
| return {instructions_image.build_id_length(), image_build_id}; |
| } |
| const uint8_t* dso_base = GetAppDSOBase(snapshot_instructions); |
| const auto& macho_header = |
| *reinterpret_cast<const struct mach_header*>(dso_base); |
| // We assume host endianness in the Mach-O file. |
| if (macho_header.magic != MH_MAGIC && macho_header.magic != MH_MAGIC_64) { |
| return {0, nullptr}; |
| } |
| const size_t macho_header_size = macho_header.magic == MH_MAGIC |
| ? sizeof(struct mach_header) |
| : sizeof(struct mach_header_64); |
| const uint8_t* it = dso_base + macho_header_size; |
| const uint8_t* end = it + macho_header.sizeofcmds; |
| while (it < end) { |
| const auto& current_cmd = *reinterpret_cast<const struct load_command*>(it); |
| if ((current_cmd.cmd & ~LC_REQ_DYLD) == LC_UUID) { |
| const auto& uuid_cmd = *reinterpret_cast<const struct uuid_command*>(it); |
| return { |
| static_cast<intptr_t>(uuid_cmd.cmdsize - sizeof(struct load_command)), |
| uuid_cmd.uuid}; |
| } |
| it += current_cmd.cmdsize; |
| } |
| return {0, nullptr}; |
| } |
| |
| } // namespace dart |
| |
| #endif // defined(DART_HOST_OS_MACOS) |