Crash Dump Analysis Patterns (Part 151)
Forthcoming Webinar on Pattern-Driven Software Diagnostics
2012 - The Year of Software Trace Analysis
Accelerated Memory Dump Analysis Training
Sponsored link: Memory Dump Analysis Services
Debugging Experts Magazine Online
Debugging Today Daily Newspaper
When disassembling JIT code it is good to see annotated function calls with full type and token information:
0:000> !CLRStack
OS Thread Id: 0xbf8 (0)
ESP EIP
001fef90 003200a4 ClassMain.DoWork()
001fef94 00320082 ClassMain.Main(System.String[])
001ff1b0 79e7c74b [GCFrame: 001ff1b0]
0:000> !U 00320082
Normal JIT generated code
ClassMain.Main(System.String[])
Begin 00320070, size 13
00320070 b960300d00 mov ecx,0D3060h (MT: ClassMain)
00320075 e8a21fdaff call 000c201c (JitHelp: CORINFO_HELP_NEWSFAST)
0032007a 8bc8 mov ecx,eax
0032007c ff159c300d00 call dword ptr ds:[0D309Ch] (ClassMain.DoWork(), mdToken: 06000002)
>>> 00320082 c3 ret
However, this doesn’t work when we disable the output of raw bytes:
0:000> .asm no_code_bytes
Assembly options: no_code_bytes
0:000> !U 00320082
Normal JIT generated code
ClassMain.Main(System.String[])
Begin 00320070, size 13
00320070 mov ecx,0D3060h
00320075 call 000c201c
0032007a mov ecx,eax
0032007c call dword ptr ds:[0D309Ch]
>>> 00320082 ret
Here we can still double check JIT-ed function calls manually:
0:000> dd 0D309Ch l1
000d309c 00320098
0:000> !IP2MD 00320098
MethodDesc: 000d3048
Method Name: ClassMain.DoWork()
Class: 000d1180
MethodTable: 000d3060
mdToken: 06000002
Module: 000d2c3c
IsJitted: yes
m_CodeOrIL: 00320098
- Dmitry Vostokov @ DumpAnalysis.org + TraceAnalysis.org -
Sponsored link: Professional Software Debugging Services
/* Malware and Software Defects -> Victimware.org */
Copyright © 2006 - 2012. This is a non-profit research and scientific project.
_1125.png)
Citrix and Microsoft Customer Forum
Museum of Debugging and Memory Dumps
7/7/2011 - 8/8/2011 Annual Competition: Tell Your Windows Debugging Story
Crash and Hang Analysis Audit Service
CARE: Crash Analysis Report Environment
Crash Dump and Software Trace Analysis Training and Seminars
Access OpenTask Titles on Safari Books Online
DATA (Dump Analysis + Trace Analysis) Facebook group
Please join the community of memory (dump) and trace analysis engineers. This group promotes scientific methods and memory dump-based worldview.
Twitter @ DumpAnalysis You can now follow portal and blog news at DumpAnalysis on Twitter
LinkedIn Group Dr. Watson Enthusiasts All about Dr. Watson errors and more. Get news, excerpts and progress reports about the forthcoming book The Science of Dr. Watson: An Illustrated History of Debugging (ISBN 978-1906717070)
2010 (0x7DA) - The Year of Dump Analysis 2011 (0x7DB) - 2020 (0x7E4) The Debugging Decade
International Memory Analysts and Debuggers Day: 07.07 and/or 08.08 starting from The Year of Dump Analysis, 2010, 7DA
AnnouncementsComing Soon:
Fundamentals of Complete Crash and Hang Memory Dump Analysis
Management Bits: An Anthology from Reductionist Manager
Crash Dump Analysis for System Administrators and Support Engineers
New Magazines:
Debugged! MZ/PE: MagaZine for/from Practicing Engineers
New Books:
Introduction to Pattern-Driven Software Problem Solving
Memory Dump Analysis Anthology: Color Supplement for Volumes 4-5
Windows Debugging Notebook: Essential User Space WinDbg Commands
Memory Dump Analysis Anthology, Volume 5
Memory Dump Analysis Anthology, Volume 4
Memory Dump Analysis Anthology: Color Supplement for Volumes 1-3
Memory Dump Analysis Anthology, Volume 3
First Fault Software Problem Solving: A Guide for Engineers, Managers and Users
x64 Windows Debugging: Practical Foundations
Also available:
Windows Debugging: Practical Foundations
DLL List Landscape: The Art from Computer Memory Space
Dumps, Bugs and Debugging Forensics: The Adventures of Dr. Debugalov
WinDbg: A Reference Poster and Learning Cards
Memory Dump Analysis Anthology, Volume 2
Memory Dump Analysis Anthology, Volume 1
New Children's Book:
