mirror of
https://github.com/dart-lang/sdk
synced 2024-09-18 21:31:20 +00:00
321 lines
7.5 KiB
C++
321 lines
7.5 KiB
C++
// Copyright (c) 2016, 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_FUCHSIA)
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#include "vm/os.h"
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#include <errno.h>
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#include <magenta/process.h>
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#include <magenta/syscalls.h>
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#include <magenta/syscalls/object.h>
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#include <magenta/types.h>
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#include "platform/assert.h"
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#include "vm/zone.h"
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namespace dart {
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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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#endif // !PRODUCT
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const char* OS::Name() {
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return "fuchsia";
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}
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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) {
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return false;
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}
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struct tm* error_code = localtime_r(&seconds, tm_result);
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return error_code != NULL;
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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 != NULL)) ? decomposed.tm_zone : "";
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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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int OS::GetLocalTimeZoneAdjustmentInSeconds() {
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// TODO(floitsch): avoid excessive calls to tzset?
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tzset();
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// Even if the offset was 24 hours it would still easily fit into 32 bits.
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// Note that Unix and Dart disagree on the sign.
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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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return mx_time_get(MX_CLOCK_UTC) / kNanosecondsPerMicrosecond;
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}
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int64_t OS::GetCurrentMonotonicTicks() {
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return mx_time_get(MX_CLOCK_MONOTONIC);
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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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return mx_time_get(MX_CLOCK_THREAD) / kNanosecondsPerMicrosecond;
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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_fuchsia.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) || defined(TARGET_ARCH_DBC)
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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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intptr_t OS::PreferredCodeAlignment() {
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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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const int kMinimumAlignment = 32;
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#elif defined(TARGET_ARCH_ARM)
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const int kMinimumAlignment = 16;
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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 code alignment for
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// testing purposes.
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// Flags::DebugIsInt("codealign", &alignment);
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ASSERT(Utils::IsPowerOfTwo(alignment));
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ASSERT(alignment >= kMinimumAlignment);
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ASSERT(alignment <= OS::kMaxPreferredCodeAlignment);
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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_CONF);
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}
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uintptr_t OS::MaxRSS() {
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mx_info_task_stats_t task_stats;
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mx_handle_t process = mx_process_self();
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mx_status_t status = mx_object_get_info(
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process, MX_INFO_TASK_STATS, &task_stats, sizeof(task_stats), NULL, NULL);
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return (status == MX_OK)
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? (task_stats.mem_private_bytes + task_stats.mem_shared_bytes)
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: 0;
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}
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void OS::Sleep(int64_t millis) {
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SleepMicros(millis * kMicrosecondsPerMillisecond);
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}
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void OS::SleepMicros(int64_t micros) {
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mx_nanosleep(mx_deadline_after(micros * kNanosecondsPerMicrosecond));
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}
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void OS::DebugBreak() {
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UNIMPLEMENTED();
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}
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uintptr_t DART_NOINLINE 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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char* OS::StrNDup(const char* s, intptr_t n) {
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return strndup(s, n);
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}
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intptr_t OS::StrNLen(const char* s, intptr_t n) {
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return strnlen(s, n);
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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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int OS::SNPrint(char* str, size_t size, const char* format, ...) {
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va_list args;
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va_start(args, format);
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int retval = VSNPrint(str, size, format, args);
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va_end(args);
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return retval;
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}
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int OS::VSNPrint(char* str, size_t size, const char* format, va_list args) {
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int retval = vsnprintf(str, size, format, args);
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if (retval < 0) {
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FATAL1("Fatal error in OS::VSNPrint with format '%s'", format);
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}
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return retval;
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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 = 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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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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}
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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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*value = strtoll(str, &endptr, base);
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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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UNIMPLEMENTED();
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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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VFPrint(stderr, format, args);
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va_end(args);
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}
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void OS::InitOnce() {
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// TODO(5411554): For now we check that initonce is called only once,
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// Once there is more formal mechanism to call InitOnce we can move
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// this check there.
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static bool init_once_called = false;
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ASSERT(init_once_called == false);
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init_once_called = true;
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}
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void OS::Shutdown() {}
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void OS::Abort() {
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abort();
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}
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void OS::Exit(int code) {
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UNIMPLEMENTED();
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}
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} // namespace dart
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#endif // defined(HOST_OS_FUCHSIA)
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