Groups   223 of 99+      julia-users › How to trace execution? 4 posts by 4 authors      Erik Schnetter    9 13 14   I want to trace the execution of a Julia program to find out where an error occurs. Is there something like a  trace macro, similar to  time or  profile?  -erik      Elliot Saba    9 13 14   Unfortunately, ` profile` is the closest we have now.  You could conceivably call ` profile` from within a `try` so that you can print out the profile results at the end. -E      Tim Holy    9 13 14   I take it you're not getting a useful backtrace from your error? That fact  alone would be worth reporting, if you have a simple test case.   If you run into troubles by not getting enough samples, you can always  decrease the delay down to 10 microseconds or so. The default setting of 1 ms  is designed to avoid any substantive performance impact, but for tracing you  might prefer more samples.   --Tim       Erik Schnetter    9 14 14   Yes, I'm not getting useful backtraces... that has several reasons:    1  I'm using OS X and LLVM 3.5  my fault . But I'm also running on  Linux, and backtraces are working fine there.   2  I'm running in parallel, and failing  test or  assers often leads  to a hang instead of an error  or backtrace .   3  I'm also running distributed via MPI, and may even have errors in  my program leading to deadlocks.   Currently I'm adding many  info  statements. I'm sure there must be a  better way... Maybe in 0.4.   -erik   --  Erik Schnetter  schn... cct.lsu.edu   http:  www.perimeterinstitute.ca personal eschnetter