Frequently Asked Questions
Dec 8, 2019 - 01:37am
Frequently Asked Questions Common Problems and Solutions Troubleshooting
How do I obtain a stack trace?
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Created On: 12 Mar 1999 6:42 pm
Last Edited: 17 Jun 2009 5:53 pm
When Web Crossing crashes it's possible that the only way to determine the problem will be by obtaining a stack trace. A stack trace tells our developers exactly what Web Crossing was doing at the instant of the crash. Obtaining a stack trace is a bit different on various operating systems.
Windows will generate a stack trace automatically if the Dr. Watson program is configured appropriately and is useful only when a "debug" version of Web Crossing with full debugging symbols is installed. Since debugging versions are much larger than standard versions this will require installing a special build.
On Unix users can install the freeware gdb (Gnu debugger) program and generate a stack trace to send to us, or send us certain files so that we can generate the stack trace ourselves. If gdb is installed, do the following:
- Start gdb like this: "gdb webx-go core" where "webx-go" is the name of the Web Crossing binary that created the core file (typically webx-go but users can change that) and "core" is the name of the core file (typically "core" on some systems and "webx-go.core" on others).
- Type "info threads" to see the threads in operation. Note how many threads (1 through NN)
- Type "thread 1"
- Type "bt" for backtrace to get the trace.
- Repeat steps "thread N" and "bt" for each thread number listed by the "info threads" command above, if applicable.
- Type "quit" to exit gdb.
If gdb is not available, make a compressed tar archive containing webx-go, webx-log, and the core file and upload it to our ftp server. The exact binary that created the core file is required so it saves time if you provide it directly.