leakhunt/bin/cdb_probe.ps1
acbot 57b5e43d0e Initial commit — leak-hunt project complete
Five bugs identified and patched in retail Asheron's Call client:
- v3b: palette refcount over-increment (3-byte NOP at two sites)
- v5: RenderSurface PurgeResource no-op stub (vtable slot 2 thunk)
- v11: two dangling-pointer crash guards (NULL-check + reorder)
- v14: CEnvCell::Destroy ClipPlaneList leak (18-byte JMP to cleanup thunk)
- v22: unpacker stale-pointer SEH guard (whole-function __try/__except)

All five ship in leakfix.dll (117 KB, SHA d282f23c…) which is loaded
by acclient.exe at process start via PE import table patching by
tools/install_leakfix.py.

Controlled 15-client fleet soak: unpatched control died at 26h with
palette exhaustion; all 14 patched clients survived past that point
and reached ≥5-day uptime.

Residual ~15 MB/h growth traced to d3d9.dll's internal slab allocator
(260KB surface backing buffers retained after Release). See REPORT.md
§10 for the full investigation; conclusion is that it's unfixable from
outside d3d9.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-05-23 21:07:58 +02:00

51 lines
1.5 KiB
PowerShell

#requires -Version 5.1
<#
cdb_probe.ps1 <dump.dmp>
Standard analysis probe for an acclient minidump. Writes structured
output next to the dump as <dump>.probe.txt.
Runs (in order):
vertarget — image version + uptime
.lastevent — last debug event captured
!peb — process env block
lm vM — modules with versions
!address -summary — VA usage summary
!address /f:Heap — list heap regions and sizes
!runaway 7 — thread CPU usage (kernel+user time)
~* k 12 — short stack of every thread (no symbols, just RVAs)
#>
param(
[Parameter(Mandatory)] [string] $Dump
)
$ErrorActionPreference = 'Stop'
if (-not (Test-Path $Dump)) { throw "Dump file not found: $Dump" }
$cdb = 'C:\Users\acbot\Tools\WindowsKits\Windows Kits\10\Debuggers\x86\cdb.exe'
$out = "$Dump.probe.txt"
$env:_NT_SYMBOL_PATH = 'C:\Users\acbot\leakhunt\pdb'
$script = @(
'.echo === vertarget ==='
'vertarget'
'.echo === lastevent ==='
'.lastevent'
'.echo === peb ==='
'!peb'
'.echo === modules ==='
'lm vM'
'.echo === address summary ==='
'!address -summary'
'.echo === heap regions ==='
'!address /f:Heap'
'.echo === runaway ==='
'!runaway 7'
'.echo === threads top frames ==='
'~* k 12'
'q'
) -join ';'
& $cdb -z $Dump -y 'C:\Users\acbot\leakhunt\pdb' -c $script 2>&1 |
Out-File -FilePath $out -Encoding utf8
Write-Output "probe written: $out size=$([math]::Round((Get-Item $out).Length/1KB,1)) KB"