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ProcessInfo.cs
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ProcessInfo.cs
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using System;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Threading.Tasks;
using Sentry.Extensibility;
using Sentry.PlatformAbstractions;
namespace Sentry.Internal
{
internal class ProcessInfo
{
internal static ProcessInfo? Instance;
/// <summary>
/// When the code was initialized.
/// </summary>
internal DateTimeOffset? StartupTime { get; private set; }
/// <summary>
/// When the device was initialized.
/// </summary>
internal DateTimeOffset? BootTime { get; }
private readonly SentryOptions _options;
private readonly Func<DateTimeOffset> _findPreciseStartupTime;
private volatile Task _preciseAppStartupTask = Task.CompletedTask;
// For testability
internal Task PreciseAppStartupTask
{
get => _preciseAppStartupTask;
private set => _preciseAppStartupTask = value;
}
internal ProcessInfo(
SentryOptions options,
Func<DateTimeOffset>? findPreciseStartupTime = null)
{
_options = options;
_findPreciseStartupTime = findPreciseStartupTime ?? GetStartupTime;
if (options.DetectStartupTime == StartupTimeDetectionMode.None)
{
_options.DiagnosticLogger?.LogDebug("Not detecting startup time due to option: {0}",
_options.DetectStartupTime);
return;
}
// Fast
var now = DateTimeOffset.UtcNow;
StartupTime = now;
try
{
BootTime = now.AddTicks(-Stopwatch.GetTimestamp()
/ (Stopwatch.Frequency
/ TimeSpan.TicksPerSecond));
}
catch (DivideByZeroException e)
{
// Seems to have failed on a single Windows Server 2012 on .NET Framework 4.8
// https://github.com/getsentry/sentry-dotnet/issues/954
_options.DiagnosticLogger?.LogError(
"Failed to find BootTime: GetTimestamp {0}, Frequency {1}, TicksPerSecond: {2}",
e, Stopwatch.GetTimestamp(), Stopwatch.Frequency, TimeSpan.TicksPerSecond);
}
// An opt-out to the more precise approach (mainly due to IL2CPP):
// https://issuetracker.unity3d.com/issues/il2cpp-player-crashes-when-calling-process-dot-getcurrentprocess-dot-starttime
if (_options.DetectStartupTime == StartupTimeDetectionMode.Best)
{
// StartupTime is set to UtcNow in this constructor.
// That's computationally cheap but not very precise.
// This method will give a better precision to the StartupTime at a cost
// of calling Process.GetCurrentProcess, on a thread pool thread.
PreciseAppStartupTask = Task.Run(() =>
{
try
{
StartupTime = _findPreciseStartupTime();
}
catch (Exception e)
{
_options.DiagnosticLogger?.LogError("Failure getting precise App startup time.", e);
//Ignore any exception and stay with the less-precise DateTime.UtcNow value.
}
}).ContinueWith(_ =>
// Let the actual task get collected
PreciseAppStartupTask = Task.CompletedTask);
}
}
private static DateTimeOffset GetStartupTime()
{
using var proc = Process.GetCurrentProcess();
return proc.StartTime.ToUniversalTime();
}
}
}