Udf debug
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8. load the new libudf in fluent and start running the udf | 8. load the new libudf in fluent and start running the udf | ||
9. Identify the process id of fluent "ps -e | grep fluent.12.0.16" | 9. Identify the process id of fluent "ps -e | grep fluent.12.0.16" | ||
| - | 10. start the debugger "gdb" | + | 10. start the debugger "gdb" in the same directory with "libudf" (should be the same as the case directory) |
11. attach to the fluent process "attach 10304"; now fluent is interrupted | 11. attach to the fluent process "attach 10304"; now fluent is interrupted | ||
12. "backtrace" or "frame" to see where we are in the code | 12. "backtrace" or "frame" to see where we are in the code | ||
13. "break filename.c:line_nr" - put a break point in your udf source at a specified line | 13. "break filename.c:line_nr" - put a break point in your udf source at a specified line | ||
14. "continue" - now fluent gets alive again until it hits your breakpoint | 14. "continue" - now fluent gets alive again until it hits your breakpoint | ||
| - | 15. | + | 15. once the breakpoint is hit, use "print/step/next..." to follow your code step by step |
16. if the bug is found or you got bored, then is time for a detach: "detach" | 16. if the bug is found or you got bored, then is time for a detach: "detach" | ||
17. "quit" | 17. "quit" | ||
Latest revision as of 08:29, 14 September 2010
Debugging a Fluent udf using gdb
1. build libudf using GUI 2. open with a text editor the file libudf/src/makefile 3. search for CFLAGS_LNAMD64 (or your appropriate platform) 4. change the option "-O" with "-O0 -g" and save the file 5. go to the libudf directory "cd libudf" 6. "make clean" 7. "make; cd ../" 8. load the new libudf in fluent and start running the udf 9. Identify the process id of fluent "ps -e | grep fluent.12.0.16" 10. start the debugger "gdb" in the same directory with "libudf" (should be the same as the case directory) 11. attach to the fluent process "attach 10304"; now fluent is interrupted 12. "backtrace" or "frame" to see where we are in the code 13. "break filename.c:line_nr" - put a break point in your udf source at a specified line 14. "continue" - now fluent gets alive again until it hits your breakpoint 15. once the breakpoint is hit, use "print/step/next..." to follow your code step by step 16. if the bug is found or you got bored, then is time for a detach: "detach" 17. "quit"
