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  • License: Freeware
  • Last update: 6 years ago
  • Total downloads: 874
  • Price: Free |
  • Operating system: WinXP, WinNT 4.x, WinNT 3.x, WinME, Win2003, Win2000, Win Vista, Win98
  • Publisher: Oleh Yuschuk
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windows default iconOllyDbg Publisher's description

A 32-bit assembler level analysing debugger for Microsoft Windows

OllyDbg is a 32-bit assembler level analysing debugger for MicrosoftВ® WindowsВ®. Emphasis on binary code analysis makes it particularly useful in cases where source is unavailable. OllyDbg is a shareware, but you can download and use it for free. Special highlights are:
Intuitive user interface, no cryptical commands
Code analysis - traces registers, recognizes procedures, loops, API calls, switches, tables, constants and strings
Directly loads and debugs DLLs
Object file scanning - locates routines from object files and libraries
Allows for user-defined labels, comments and function descriptions
Understands debugging information in BorlandВ® format
Saves patches Between sessions, writes them back to executable file and updates fixups
Open architecture - many third-party plugins are available
No installation - no trash in registry or system directories
Debugs multithread applications
Attaches to running programs
Configurable disassembler, supports both MASM and IDEAL formats
MMX, 3DNow! and SSE data types and instructions, including Athlon extensions
Full UNICODE support
Dynamically recognizes ASCII and UNICODE strings - also in Delphi format!
Recognizes complex code constructs, like call to jump to procedure
Decodes calls to more than 1900 standard API and 400 C functions
Gives context-sensitive help on API functions from external help file
Sets conditional, logging, memory and hardware breakpoints
Traces program execution, logs arguments of known functions
Shows fixups

The second beta. I've planned that it will come with the more or less complete help file. Unfortunately, I had no time to write it. Therefore there will be also the third beta release... soon.
There are many - over 20 - bugfixes in the beta 2, some of them are really critical. As promised, there are no significant changes, with two exceptions. The recognition of UNICODE strings is vastly improved, they are no longer limited to ASCII subset

What's New in This Release:

В· Ported to UNICODE. Multilanguage support for ASCII apps in modern Windows is practically non-existing, and I got tired bypassing all such incompatibilities. This step means that version 2 will not work on Windows 95 and 98.
В· Source debugging is here again, a bit incomplete. It supports only Microsoft compilers via dbghelp.dll. New is support for symbol server, stack walking using dbghelp and names of procedure parameters.
В· Debugging of standalone DLLs, in my opinion significantly better than before. It even measures call duration with sub-microsecond resolution (good for profiling) and saves contents of dumps between sessions!
В· Many small improvements, like pause only on selected module(s), breakpoints on all intermodular calls, automatical closing of dump windows on different process, bugfixes, and more

System Requirements:

В· 586/100 processor (586/300+ recommended)
В· Microsoft Windows 95, Windows 98, Windows NT 4.0 (Service Pack 2 or higher), Windows 2000 or higher operational system
В· 64 MB physical memory (128 MB recommended)
В· At least 2 MB free disk space
В· VGA display (SVGA with screen resolution at least 800x600 is strongly recommended)
В· Mouse or compatible pointing device (required)
Program Release Status: Major Update
Program Install Support: Install and Uninstall

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