mirror of
https://github.com/dart-lang/sdk
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f9a6a5bdd2
TEST=build Change-Id: I2834ef7cf7cb7c8770f8167a2438cbedcee5c623 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/292063 Commit-Queue: Ryan Macnak <rmacnak@google.com> Reviewed-by: Alexander Aprelev <aam@google.com>
348 lines
9.1 KiB
C++
348 lines
9.1 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(DART_HOST_OS_ANDROID)
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#include "vm/os.h"
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#include <android/log.h> // NOLINT
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#include <errno.h> // NOLINT
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#include <limits.h> // NOLINT
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#include <malloc.h> // NOLINT
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#include <sys/resource.h> // NOLINT
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#include <sys/time.h> // NOLINT
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#include <sys/types.h> // NOLINT
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#include <time.h> // NOLINT
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#include <unistd.h> // NOLINT
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#include "platform/utils.h"
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#include "vm/code_observers.h"
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#include "vm/dart.h"
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#include "vm/isolate.h"
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#include "vm/timeline.h"
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#include "vm/zone.h"
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namespace dart {
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DEFINE_FLAG(bool,
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android_log_to_stderr,
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false,
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"Send Dart VM logs to stdout and stderr instead of the Android "
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"system logs.");
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// Android CodeObservers.
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#ifndef PRODUCT
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DEFINE_FLAG(bool,
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generate_perf_events_symbols,
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false,
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"Generate events symbols for profiling with perf");
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class PerfCodeObserver : public CodeObserver {
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public:
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PerfCodeObserver() : out_file_(nullptr) {
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Dart_FileOpenCallback file_open = Dart::file_open_callback();
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if (file_open == nullptr) {
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return;
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}
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intptr_t pid = getpid();
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char* filename = OS::SCreate(nullptr, "/tmp/perf-%" Pd ".map", pid);
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out_file_ = (*file_open)(filename, true);
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free(filename);
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}
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~PerfCodeObserver() {
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Dart_FileCloseCallback file_close = Dart::file_close_callback();
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if ((file_close == nullptr) || (out_file_ == nullptr)) {
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return;
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}
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(*file_close)(out_file_);
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}
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virtual bool IsActive() const {
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return FLAG_generate_perf_events_symbols && (out_file_ != nullptr);
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}
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virtual void Notify(const char* name,
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uword base,
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uword prologue_offset,
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uword size,
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bool optimized,
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const CodeComments* comments) {
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Dart_FileWriteCallback file_write = Dart::file_write_callback();
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if ((file_write == nullptr) || (out_file_ == nullptr)) {
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return;
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}
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const char* marker = optimized ? "*" : "";
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char* buffer =
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OS::SCreate(Thread::Current()->zone(), "%" Px " %" Px " %s%s\n", base,
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size, marker, name);
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(*file_write)(buffer, strlen(buffer), out_file_);
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}
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private:
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void* out_file_;
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DISALLOW_COPY_AND_ASSIGN(PerfCodeObserver);
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};
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#endif // !PRODUCT
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intptr_t OS::ProcessId() {
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return static_cast<intptr_t>(getpid());
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}
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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) return false;
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struct tm* error_code = localtime_r(&seconds, tm_result);
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return error_code != nullptr;
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}
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const char* OS::GetTimeZoneName(int64_t seconds_since_epoch) {
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tm decomposed;
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bool succeeded = LocalTime(seconds_since_epoch, &decomposed);
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// If unsuccessful, return an empty string like V8 does.
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return (succeeded && (decomposed.tm_zone != nullptr)) ? decomposed.tm_zone
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: "";
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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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bool succeeded = LocalTime(seconds_since_epoch, &decomposed);
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// Even if the offset was 24 hours it would still easily fit into 32 bits.
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// If unsuccessful, return zero like V8 does.
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return succeeded ? static_cast<int>(decomposed.tm_gmtoff) : 0;
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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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// gettimeofday has microsecond resolution.
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struct timeval tv;
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if (gettimeofday(&tv, nullptr) < 0) {
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UNREACHABLE();
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return 0;
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}
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return (static_cast<int64_t>(tv.tv_sec) * 1000000) + tv.tv_usec;
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}
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int64_t OS::GetCurrentMonotonicTicks() {
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struct timespec ts;
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if (clock_gettime(CLOCK_MONOTONIC, &ts) != 0) {
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UNREACHABLE();
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return 0;
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}
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// Convert to nanoseconds.
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int64_t result = ts.tv_sec;
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result *= kNanosecondsPerSecond;
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result += ts.tv_nsec;
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return result;
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}
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int64_t OS::GetCurrentMonotonicFrequency() {
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return kNanosecondsPerSecond;
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}
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int64_t OS::GetCurrentMonotonicMicros() {
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int64_t ticks = GetCurrentMonotonicTicks();
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ASSERT(GetCurrentMonotonicFrequency() == kNanosecondsPerSecond);
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return ticks / kNanosecondsPerMicrosecond;
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}
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int64_t OS::GetCurrentThreadCPUMicros() {
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struct timespec ts;
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if (clock_gettime(CLOCK_THREAD_CPUTIME_ID, &ts) != 0) {
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UNREACHABLE();
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return -1;
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}
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int64_t result = ts.tv_sec;
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result *= kMicrosecondsPerSecond;
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result += (ts.tv_nsec / kNanosecondsPerMicrosecond);
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return result;
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}
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int64_t OS::GetCurrentMonotonicMicrosForTimeline() {
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#if defined(SUPPORT_TIMELINE)
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if (Timeline::recorder_discards_clock_values()) return -1;
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return GetCurrentMonotonicMicros();
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#else
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return -1;
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#endif
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}
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// TODO(5411554): May need to hoist these architecture dependent code
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// into a architecture specific file e.g: os_ia32_linux.cc
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intptr_t OS::ActivationFrameAlignment() {
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#if defined(TARGET_ARCH_IA32) || defined(TARGET_ARCH_X64) || \
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defined(TARGET_ARCH_ARM64)
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const int kMinimumAlignment = 16;
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#elif defined(TARGET_ARCH_ARM)
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const int kMinimumAlignment = 8;
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#else
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#error Unsupported architecture.
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#endif
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intptr_t alignment = kMinimumAlignment;
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// TODO(5411554): Allow overriding default stack alignment for
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// testing purposes.
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// Flags::DebugIsInt("stackalign", &alignment);
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ASSERT(Utils::IsPowerOfTwo(alignment));
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ASSERT(alignment >= kMinimumAlignment);
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return alignment;
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}
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int OS::NumberOfAvailableProcessors() {
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return sysconf(_SC_NPROCESSORS_ONLN);
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}
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void OS::Sleep(int64_t millis) {
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int64_t micros = millis * kMicrosecondsPerMillisecond;
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SleepMicros(micros);
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}
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void OS::SleepMicros(int64_t micros) {
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struct timespec req; // requested.
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struct timespec rem; // remainder.
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int64_t seconds = micros / kMicrosecondsPerSecond;
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micros = micros - seconds * kMicrosecondsPerSecond;
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int64_t nanos = micros * kNanosecondsPerMicrosecond;
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req.tv_sec = seconds;
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req.tv_nsec = nanos;
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while (true) {
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int r = nanosleep(&req, &rem);
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if (r == 0) {
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break;
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}
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// We should only ever see an interrupt error.
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ASSERT(errno == EINTR);
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// Copy remainder into requested and repeat.
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req = rem;
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}
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}
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void OS::DebugBreak() {
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__builtin_trap();
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}
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DART_NOINLINE uintptr_t OS::GetProgramCounter() {
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return reinterpret_cast<uintptr_t>(
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__builtin_extract_return_addr(__builtin_return_address(0)));
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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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if (FLAG_android_log_to_stderr) {
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vfprintf(stderr, format, args);
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} else {
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// Forward to the Android log for remote access.
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__android_log_vprint(ANDROID_LOG_INFO, "DartVM", format, args);
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}
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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(nullptr, 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 != nullptr);
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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 != nullptr && strlen(str) > 0 && value != nullptr);
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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>(strtoull(str, &endptr, base));
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} else {
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*value = strtoll(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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#ifndef PRODUCT
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if (FLAG_generate_perf_events_symbols) {
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CodeObservers::Register(new PerfCodeObserver);
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}
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#endif // !PRODUCT
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}
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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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if (FLAG_android_log_to_stderr) {
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vfprintf(stderr, format, args);
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} else {
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// Forward to the Android log for remote access.
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__android_log_vprint(ANDROID_LOG_ERROR, "DartVM", format, args);
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}
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va_end(args);
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}
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void OS::Init() {}
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void OS::Cleanup() {}
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void OS::PrepareToAbort() {}
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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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exit(code);
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}
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} // namespace dart
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#endif // defined(DART_HOST_OS_ANDROID)
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