DOCUMENT:Q92537 25-NOV-1999 [win16sdk] TITLE :SAMPLE: Windows Application Produces Stack Trace PRODUCT :Microsoft Windows Software Development Kit PROD/VER:WINDOWS:3.0,3.1 OPER/SYS: KEYWORDS:kbsample kb16bitonly kbOSWin310 kbOSWin300 ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows Software Development Kit (SDK) versions 3.0, 3.1 ------------------------------------------------------------------------------- SUMMARY ======= STKTRACE is a sample Windows-based application that contains the complete code to obtain a stack trace of the "current task." The stack trace includes symbolic information extracted from the symbol files, similar to that produced by the Windows debug kernel at the time of a FatalExit. In this sample, the stack trace is logged into a buffer and output to a message box. The STKTRACE sample uses the tool helper library and can be used in the Windows versions 3.0 and 3.1 environments because TOOLHELP.DLL is a redistributable. MORE INFORMATION ================ The following file is available for download from the Microsoft Download Center: Stktrace.exe (http://download.microsoft.com/download/platformsdk/sample63/1/W31/EN-US/STKTRACE.EXE) For additional information about how to download Microsoft Support files, click the article number below to view the article in the Microsoft Knowledge Base: Q119591 How to Obtain Microsoft Support Files from Online Services Microsoft used the most current virus detection software available on the date of posting to scan this file for viruses. Once posted, the file is housed on secure servers that prevent any unauthorized changes to the file. Usually, the Windows debug kernel produces a stack trace on the debug terminal when the SPACE BAR or ENTER key is pressed at the time of a FatalExit. For more information on stack traces produced by the debug kernel, query on the following words in the Microsoft Knowledge Base: " stack trace space bar " (without the quotation marks) However, when you are writing a debugger or a large complex application, it might be necessary to produce stack traces in your application. Then, the STKTRACE sample code can be helpful. This sample consists of two main modules, GETTRACE.C and GETSYMBOL.C, and a driver module, STKTRACE.C, which merely calls the API from the GETTRACE.C module. The GETTRACE.C module contains code to walk the stack of the current task by using the tool helper library and the GETSYMBOL.C module contains code to obtain symbol names from corresponding symbol (.SYM) files by using the symbol file format. These two modules can be plugged into any application or a DLL (dynamic-link library). Note that the THSAMPLE application in the \SDK31\SAMPLES\TOOLHELP directory also illustrates how to produce stack traces for a given task that is not the current task. In contrast, the STKTRACE sample walks the stack of the current task by obtaining the register values from the stack and using the StackTraceCSIPFirst() and StackTraceNext() APIs from the tool helper library. Also, the STKTRACE sample provides symbolic information in the stack trace. The GETSYM.C module provides symbolic information by using the symbol file format documented in the Microsoft Windows SDK version 3.1 "Programmer's Reference, Volume 4: Resources" manual. Given a segment:offset address, this module finds the "nearest" public symbol in the corresponding symbol (.SYM) file. Additional query words: 3.00 3.10 softlib STKTRACE.EXE kbfile ====================================================================== Keywords : kbsample kb16bitonly kbOSWin310 kbOSWin300 Technology : kbAudDeveloper kbWin3xSearch kbSDKSearch kbWinSDKSearch kbWinSDK300 kbWinSDK310 Version : WINDOWS:3.0,3.1 ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 1999.