# Take one UMDH stack-tagged heap snapshot of a running process.
#
# Requirements:
#   - gflags /i acclient.exe +ust   (one-time, registry-set)
#   - _NT_SYMBOL_PATH pointing at acclient.pdb directory
#   - umdh.exe on PATH (Windows Debugging Tools)

param(
    [Parameter(Mandatory=$true)][int]$ProcessId,
    [Parameter(Mandatory=$true)][string]$Out
)

$ErrorActionPreference = "Stop"

if (-not $env:_NT_SYMBOL_PATH) {
    Write-Warning "_NT_SYMBOL_PATH not set — symbols may not resolve"
}

& umdh.exe -p:$ProcessId -f:$Out

if (-not (Test-Path $Out)) {
    throw "umdh produced no output at $Out"
}

$size = (Get-Item $Out).Length
Write-Host "snapshot: $Out  ($size bytes)"