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![Daco Harkes](/assets/img/avatar_default.png)
And regression test for dartbug.com/37069 Fixes: https://github.com/dart-lang/sdk/issues/37176 Follow up of: https://dart-review.googlesource.com/c/sdk/+/103814 Bug: https://github.com/dart-lang/sdk/issues/37069 Change-Id: I066561b487c691952496e2ca6878ac82cee0e02e Cq-Include-Trybots: luci.dart.try:vm-ffi-android-debug-arm-try, app-kernel-linux-debug-x64-try, vm-kernel-linux-debug-simdbc64-try,vm-kernel-mac-debug-simdbc64-try,vm-kernel-reload-mac-debug-simdbc64-try,vm-kernel-linux-debug-ia32-try,vm-dartkb-linux-debug-simarm64-try,vm-kernel-win-debug-x64-try Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/105941 Commit-Queue: Daco Harkes <dacoharkes@google.com> Reviewed-by: Samir Jindel <sjindel@google.com>
362 lines
10 KiB
C++
362 lines
10 KiB
C++
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#include "vm/globals.h"
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#if defined(HOST_OS_WINDOWS)
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#include "vm/os.h"
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#include <malloc.h> // NOLINT
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#include <process.h> // NOLINT
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#include <psapi.h> // NOLINT
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#include <time.h> // NOLINT
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#include "platform/assert.h"
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#include "platform/utils.h"
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#include "vm/os_thread.h"
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#include "vm/zone.h"
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namespace dart {
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// Defined in vm/os_thread_win.cc
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extern bool private_flag_windows_run_tls_destructors;
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const char* OS::Name() {
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return "windows";
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}
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intptr_t OS::ProcessId() {
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return static_cast<intptr_t>(GetCurrentProcessId());
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}
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// As a side-effect sets the globals _timezone, _daylight and _tzname.
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static bool LocalTime(int64_t seconds_since_epoch, tm* tm_result) {
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time_t seconds = static_cast<time_t>(seconds_since_epoch);
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if (seconds != seconds_since_epoch) {
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return false;
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}
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// localtime_s implicitly sets _timezone, _daylight and _tzname.
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errno_t error_code = localtime_s(tm_result, &seconds);
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return error_code == 0;
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}
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static int GetDaylightSavingBiasInSeconds() {
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TIME_ZONE_INFORMATION zone_information;
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memset(&zone_information, 0, sizeof(zone_information));
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if (GetTimeZoneInformation(&zone_information) == TIME_ZONE_ID_INVALID) {
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// By default the daylight saving offset is an hour.
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return -60 * 60;
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} else {
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return static_cast<int>(zone_information.DaylightBias * 60);
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}
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}
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const char* OS::GetTimeZoneName(int64_t seconds_since_epoch) {
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TIME_ZONE_INFORMATION zone_information;
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memset(&zone_information, 0, sizeof(zone_information));
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// Initialize and grab the time zone data.
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_tzset();
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DWORD status = GetTimeZoneInformation(&zone_information);
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if (GetTimeZoneInformation(&zone_information) == TIME_ZONE_ID_INVALID) {
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// If we can't get the time zone data, the Windows docs indicate that we
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// are probably out of memory. Return an empty string.
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return "";
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}
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// Figure out whether we're in standard or daylight.
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bool daylight_savings = (status == TIME_ZONE_ID_DAYLIGHT);
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if (status == TIME_ZONE_ID_UNKNOWN) {
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tm local_time;
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if (LocalTime(seconds_since_epoch, &local_time)) {
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daylight_savings = (local_time.tm_isdst == 1);
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}
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}
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// Convert the wchar string to a null-terminated utf8 string.
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wchar_t* wchar_name = daylight_savings ? zone_information.DaylightName
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: zone_information.StandardName;
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intptr_t utf8_len =
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WideCharToMultiByte(CP_UTF8, 0, wchar_name, -1, NULL, 0, NULL, NULL);
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char* name = ThreadState::Current()->zone()->Alloc<char>(utf8_len + 1);
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WideCharToMultiByte(CP_UTF8, 0, wchar_name, -1, name, utf8_len, NULL, NULL);
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name[utf8_len] = '\0';
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return name;
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}
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int OS::GetTimeZoneOffsetInSeconds(int64_t seconds_since_epoch) {
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tm decomposed;
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// LocalTime will set _timezone.
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bool succeeded = LocalTime(seconds_since_epoch, &decomposed);
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if (succeeded) {
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int inDaylightSavingsTime = decomposed.tm_isdst;
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ASSERT(inDaylightSavingsTime == 0 || inDaylightSavingsTime == 1);
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// Dart and Windows disagree on the sign of the bias.
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int offset = static_cast<int>(-_timezone);
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if (inDaylightSavingsTime == 1) {
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static int daylight_bias = GetDaylightSavingBiasInSeconds();
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// Subtract because windows and Dart disagree on the sign.
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offset = offset - daylight_bias;
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}
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return offset;
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} else {
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// Return zero like V8 does.
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return 0;
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}
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}
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int OS::GetLocalTimeZoneAdjustmentInSeconds() {
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// TODO(floitsch): avoid excessive calls to _tzset?
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_tzset();
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// Dart and Windows disagree on the sign of the bias.
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return static_cast<int>(-_timezone);
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}
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int64_t OS::GetCurrentTimeMillis() {
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return GetCurrentTimeMicros() / 1000;
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}
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int64_t OS::GetCurrentTimeMicros() {
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static const int64_t kTimeEpoc = 116444736000000000LL;
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static const int64_t kTimeScaler = 10; // 100 ns to us.
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// Although win32 uses 64-bit integers for representing timestamps,
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// these are packed into a FILETIME structure. The FILETIME
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// structure is just a struct representing a 64-bit integer. The
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// TimeStamp union allows access to both a FILETIME and an integer
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// representation of the timestamp. The Windows timestamp is in
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// 100-nanosecond intervals since January 1, 1601.
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union TimeStamp {
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FILETIME ft_;
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int64_t t_;
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};
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TimeStamp time;
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GetSystemTimeAsFileTime(&time.ft_);
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return (time.t_ - kTimeEpoc) / kTimeScaler;
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}
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static int64_t qpc_ticks_per_second = 0;
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int64_t OS::GetCurrentMonotonicTicks() {
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if (qpc_ticks_per_second == 0) {
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// QueryPerformanceCounter not supported, fallback.
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return GetCurrentTimeMicros();
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}
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// Grab performance counter value.
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LARGE_INTEGER now;
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QueryPerformanceCounter(&now);
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return static_cast<int64_t>(now.QuadPart);
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}
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int64_t OS::GetCurrentMonotonicFrequency() {
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if (qpc_ticks_per_second == 0) {
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// QueryPerformanceCounter not supported, fallback.
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return kMicrosecondsPerSecond;
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}
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return qpc_ticks_per_second;
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}
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int64_t OS::GetCurrentMonotonicMicros() {
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int64_t ticks = GetCurrentMonotonicTicks();
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int64_t frequency = GetCurrentMonotonicFrequency();
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// Convert to microseconds.
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int64_t seconds = ticks / frequency;
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int64_t leftover_ticks = ticks - (seconds * frequency);
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int64_t result = seconds * kMicrosecondsPerSecond;
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result += ((leftover_ticks * kMicrosecondsPerSecond) / frequency);
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return result;
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}
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int64_t OS::GetCurrentThreadCPUMicros() {
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// TODO(johnmccutchan): Implement. See base/time_win.cc for details.
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return -1;
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}
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intptr_t OS::ActivationFrameAlignment() {
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#if defined(TARGET_ARCH_ARM64) || \
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defined(TARGET_ARCH_DBC) && defined(HOST_ARCH_ARM64)
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return 16;
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#elif defined(TARGET_ARCH_ARM) || \
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defined(TARGET_ARCH_DBC) && defined(HOST_ARCH_ARM)
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return 8;
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#elif defined(_WIN64)
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// Windows 64-bit ABI requires the stack to be 16-byte aligned.
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return 16;
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#else
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// No requirements on Win32.
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return 1;
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#endif
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}
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intptr_t OS::PreferredCodeAlignment() {
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ASSERT(32 <= OS::kMaxPreferredCodeAlignment);
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#if defined(TARGET_ARCH_IA32) || defined(TARGET_ARCH_X64) || \
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defined(TARGET_ARCH_ARM64) || defined(TARGET_ARCH_DBC)
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return 32;
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#elif defined(TARGET_ARCH_ARM)
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return 16;
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#else
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#error Unsupported architecture.
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#endif
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}
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int OS::NumberOfAvailableProcessors() {
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SYSTEM_INFO info;
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GetSystemInfo(&info);
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return info.dwNumberOfProcessors;
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}
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void OS::Sleep(int64_t millis) {
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::Sleep(millis);
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}
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void OS::SleepMicros(int64_t micros) {
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// Windows only supports millisecond sleeps.
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if (micros < kMicrosecondsPerMillisecond) {
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// Calling ::Sleep with 0 has no determined behaviour, round up.
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micros = kMicrosecondsPerMillisecond;
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}
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OS::Sleep(micros / kMicrosecondsPerMillisecond);
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}
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void OS::DebugBreak() {
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#if defined(_MSC_VER)
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// Microsoft Visual C/C++ or drop-in replacement.
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__debugbreak();
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#elif defined(__GCC__)
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__builtin_trap();
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#else
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// Microsoft style assembly.
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__asm {
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int 3
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}
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#endif
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}
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DART_NOINLINE uintptr_t OS::GetProgramCounter() {
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return reinterpret_cast<uintptr_t>(_ReturnAddress());
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}
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void OS::Print(const char* format, ...) {
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va_list args;
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va_start(args, format);
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VFPrint(stdout, format, args);
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va_end(args);
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}
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void OS::VFPrint(FILE* stream, const char* format, va_list args) {
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vfprintf(stream, format, args);
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fflush(stream);
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}
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char* OS::SCreate(Zone* zone, const char* format, ...) {
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va_list args;
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va_start(args, format);
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char* buffer = VSCreate(zone, format, args);
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va_end(args);
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return buffer;
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}
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char* OS::VSCreate(Zone* zone, const char* format, va_list args) {
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// Measure.
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va_list measure_args;
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va_copy(measure_args, args);
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intptr_t len = Utils::VSNPrint(NULL, 0, format, measure_args);
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va_end(measure_args);
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char* buffer;
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if (zone) {
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buffer = zone->Alloc<char>(len + 1);
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} else {
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buffer = reinterpret_cast<char*>(malloc(len + 1));
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}
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ASSERT(buffer != NULL);
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// Print.
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va_list print_args;
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va_copy(print_args, args);
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Utils::VSNPrint(buffer, len + 1, format, print_args);
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va_end(print_args);
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return buffer;
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}
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bool OS::StringToInt64(const char* str, int64_t* value) {
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ASSERT(str != NULL && strlen(str) > 0 && value != NULL);
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int32_t base = 10;
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char* endptr;
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int i = 0;
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if (str[0] == '-') {
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i = 1;
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} else if (str[0] == '+') {
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i = 1;
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}
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if ((str[i] == '0') && (str[i + 1] == 'x' || str[i + 1] == 'X') &&
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(str[i + 2] != '\0')) {
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base = 16;
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}
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errno = 0;
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if (base == 16) {
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// Unsigned 64-bit hexadecimal integer literals are allowed but
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// immediately interpreted as signed 64-bit integers.
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*value = static_cast<int64_t>(_strtoui64(str, &endptr, base));
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} else {
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*value = _strtoi64(str, &endptr, base);
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}
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return ((errno == 0) && (endptr != str) && (*endptr == 0));
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}
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void OS::RegisterCodeObservers() {}
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void OS::PrintErr(const char* format, ...) {
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va_list args;
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va_start(args, format);
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VFPrint(stderr, format, args);
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va_end(args);
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}
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void OS::Init() {
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static bool init_once_called = false;
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if (init_once_called) {
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return;
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}
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init_once_called = true;
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// Do not pop up a message box when abort is called.
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_set_abort_behavior(0, _WRITE_ABORT_MSG);
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ThreadLocalData::Init();
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LARGE_INTEGER ticks_per_sec;
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if (!QueryPerformanceFrequency(&ticks_per_sec)) {
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qpc_ticks_per_second = 0;
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} else {
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qpc_ticks_per_second = static_cast<int64_t>(ticks_per_sec.QuadPart);
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}
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}
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void OS::Cleanup() {
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// TODO(zra): Enable once VM can shutdown cleanly.
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// ThreadLocalData::Cleanup();
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}
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void OS::PrepareToAbort() {
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// TODO(zra): Remove once VM shuts down cleanly.
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private_flag_windows_run_tls_destructors = false;
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}
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void OS::Abort() {
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PrepareToAbort();
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abort();
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}
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void OS::Exit(int code) {
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// TODO(zra): Remove once VM shuts down cleanly.
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private_flag_windows_run_tls_destructors = false;
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// On Windows we use ExitProcess so that threads can't clobber the exit_code.
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// See: https://code.google.com/p/nativeclient/issues/detail?id=2870
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::ExitProcess(code);
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}
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} // namespace dart
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#endif // defined(HOST_OS_WINDOWS)
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