d0f7acf9eb
An x86-64 operating system built from xv6, now largely rewritten: SMP, a copy-on-write root filesystem (SchFS), PCI/USB/virtio drivers, a TTF rasteriser, and a Linux-numbered syscall ABI. No history before this point -- the tree was never under version control. This commit exists so the rename that follows has something to undo to.
115 lines
4.1 KiB
PowerShell
115 lines
4.1 KiB
PowerShell
# Boot Schunix, crash it on purpose, and capture the crash screen as an image.
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#
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# The crash screen is the one part of the system you cannot look at by using
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# the system, so it is the one part that quietly rots. This drives it through
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# /proc/sysrq and takes a picture, which turns "does the panic screen still
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# render" into something answerable in thirty seconds.
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#
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# QEMU's monitor is on its own socket so the serial console stays free for the
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# shell. screendump writes a PPM; the PNG conversion is optional and skipped if
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# ImageMagick is not around.
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#
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# tools\crashshot.ps1 crash the ramdisk-root build
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# tools\crashshot.ps1 -SchFS with a SchFS volume attached
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param(
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[switch]$SchFS,
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[int]$BootSeconds = 20,
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[string]$Out = "build\crashscreen.ppm",
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[string]$Qemu = "$env:USERPROFILE\scoop\apps\qemu\current\qemu-system-x86_64.exe"
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)
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$ErrorActionPreference = 'Stop'
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$root = Split-Path $PSScriptRoot -Parent
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$hda = Join-Path $root 'schunix.img'
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$hdb = if ($SchFS) { Join-Path $root 'build\schfs.img' } else { Join-Path $root 'build\fs.img' }
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$log = Join-Path $root 'build\crashshot.log'
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$ppm = Join-Path $root $Out
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$mon = Join-Path $root 'build\qemu-mon.sock'
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Remove-Item -Force $log, $ppm -ErrorAction SilentlyContinue
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# The monitor goes to a TCP port rather than a unix socket: PowerShell can open
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# a TCP client without any extra machinery, and QEMU on Windows has no unix
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# sockets anyway.
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$monPort = 55555
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$psi = New-Object System.Diagnostics.ProcessStartInfo
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$psi.FileName = $Qemu
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$psi.Arguments = @(
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"-drive file=`"$hda`",format=raw,index=0,media=disk"
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"-drive file=`"$hdb`",format=raw,index=1,media=disk"
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'-m 1G -smp 1 -cpu qemu64,+rdtscp -machine pc-i440fx-9.2'
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'-display none'
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"-chardev stdio,id=c0,logfile=`"$log`""
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'-serial chardev:c0'
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"-monitor tcp:127.0.0.1:$monPort,server,nowait"
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) -join ' '
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$psi.RedirectStandardInput = $true
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$psi.UseShellExecute = $false
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Write-Host "==> booting" -ForegroundColor Cyan
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$p = [System.Diagnostics.Process]::Start($psi)
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function Send-Line($text) {
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foreach ($ch in ($text + "`n").ToCharArray()) {
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$p.StandardInput.Write($ch)
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$p.StandardInput.Flush()
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Start-Sleep -Milliseconds 30 # serial has no flow control
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}
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}
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try {
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Start-Sleep -Seconds $BootSeconds
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# Put something on the display first. The whole design of the crash screen
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# is that it dims what was there rather than clearing it, so a blank screen
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# underneath would prove nothing.
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Write-Host " > filling the screen with normal output" -ForegroundColor DarkGray
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Send-Line 'ls /bin'
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Start-Sleep -Seconds 3
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Send-Line 'cat /proc/cpuinfo'
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Start-Sleep -Seconds 2
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Write-Host " > echo c > /proc/sysrq" -ForegroundColor DarkGray
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Send-Line 'echo c > /proc/sysrq'
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Start-Sleep -Seconds 4
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Write-Host "==> capturing the framebuffer" -ForegroundColor Cyan
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$client = New-Object System.Net.Sockets.TcpClient('127.0.0.1', $monPort)
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$stream = $client.GetStream()
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$writer = New-Object System.IO.StreamWriter($stream)
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$writer.AutoFlush = $true
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Start-Sleep -Milliseconds 500
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# QEMU on Windows wants a native path here, not the one PowerShell shows.
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$writer.WriteLine("screendump $ppm")
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Start-Sleep -Seconds 2
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$writer.WriteLine('quit')
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Start-Sleep -Milliseconds 500
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$client.Close()
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} finally {
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if (-not $p.HasExited) { $p.Kill() }
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Start-Sleep -Milliseconds 800
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}
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if (Test-Path $log) {
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$text = Get-Content $log -Raw
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Write-Host "==> serial transcript" -ForegroundColor Cyan
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# Only the crash report, not the whole boot.
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$idx = $text.IndexOf('Schunix stopped')
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if ($idx -ge 0) { Write-Host $text.Substring($idx) } else { Write-Host $text }
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}
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if (Test-Path $ppm) {
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$size = (Get-Item $ppm).Length
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Write-Host "==> $ppm ($size bytes)" -ForegroundColor Green
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$png = [System.IO.Path]::ChangeExtension($ppm, '.png')
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$magick = Get-Command magick -ErrorAction SilentlyContinue
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if ($magick) {
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& magick $ppm $png
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Write-Host "==> $png" -ForegroundColor Green
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}
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} else {
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Write-Host "FAIL: no screendump was produced" -ForegroundColor Red
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exit 1
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}
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