[CmdletBinding()]
param(
    [Parameter(Mandatory=$true)][string]$ExecutableName,
    [Parameter(Mandatory=$true)][string[]]$ExecutableArguments,
    [Parameter(Mandatory=$true)][string]$LogStem
)

$ErrorActionPreference = 'Stop'
$RoundDir = [IO.Path]::GetFullPath($PSScriptRoot)
$StandaloneRoot = [IO.Path]::GetFullPath((Join-Path $PSScriptRoot '..\..\..'))
if ([IO.Path]::GetFileName($ExecutableName) -ne $ExecutableName) { throw 'ExecutableName must be a filename.' }
if ([IO.Path]::GetFileName($LogStem) -ne $LogStem) { throw 'LogStem must be a filename stem.' }
$ExecutablePath = Join-Path (Join-Path $StandaloneRoot 'bin') $ExecutableName
if (-not (Test-Path -LiteralPath $ExecutablePath -PathType Leaf)) { throw "Executable not found: $ExecutablePath" }
$StdoutPath = Join-Path $RoundDir ($LogStem + '.stdout.log')
$StderrPath = Join-Path $RoundDir ($LogStem + '.stderr.log')

$HostProcess = Get-Process -Id $PID
$HostProcess.PriorityClass = 'Normal'
$HostProcess.ProcessorAffinity = [IntPtr]0xFFFF
$Child = Start-Process -FilePath $ExecutablePath -ArgumentList $ExecutableArguments `
    -WorkingDirectory $StandaloneRoot -WindowStyle Hidden -PassThru `
    -RedirectStandardOutput $StdoutPath -RedirectStandardError $StderrPath
$PeakWorkingSet = 0L
while (-not $Child.HasExited) {
    $Child.Refresh()
    if ($Child.HasExited) { break }
    $Child.PriorityClass = 'Normal'
    $Child.ProcessorAffinity = [IntPtr]0xFFFF
    $PeakWorkingSet = [Math]::Max($PeakWorkingSet,$Child.WorkingSet64)
    Start-Sleep -Milliseconds 500
}
$Child.WaitForExit()
$Child.Refresh()
Write-Output "RUN_EXIT pid=$($Child.Id) priority=Normal affinity=0xFFFF peak_process_gb=$([math]::Round($PeakWorkingSet/1GB,2)) exit_code=$($Child.ExitCode)"
exit $Child.ExitCode