Failure to extract features for c++ programs

[twang15]

There are error messages while extracting features of a c++ program.
E.g.,

ML-FEAT-PROC Error (2): Error consulting featuresall.P: unrecoverable_error/++Error[XSB/Runtime/P]: [Unrecoverable!]
++Memory violation occurred during evaluation.
++Please report this problem using the XSB bug tracking system accessible from
++ http://sourceforge.net/projects/xsb
++Please supply the steps necessary to reproduce the bug.
SourceForge
XSB
Download XSB for free. Logic Programming and Deductive Database system (Tabled Prolog) for Unix and Windows.
[featuresall compiled, cpu time used: 1.0250 seconds]
ML-FEAT-PROC Error (2): Error consulting featuresall.P: misc_error/++Error[XSB/Runtime/P]: [Miscellaneous] [Error in loading file ,./featuresall.xwam]
ML-FEAT-PROC Error: Query Error: existence_error/++Error[XSB/Runtime/P]: [Existence (No procedure :(usermod,/(fn_bb_nr,2)) exists)]

[twang15]

Also, not every function has a corresponding *.ft (feature file), which may be caused by the above error.

[twang15]

It may be caused by concurrent access to certain files when invoking multiple g++ instance with make -jN, where N is >= 2.

Using single compilation thread can indeed eliminate the above error message.

[gfursin]

Good point and thanks for reporting! I added notes to readme: https://github.com/ctuning/reproduce-milepost-project#notes . By the way, this is yet another motivation to implement feature aggregation inside GCC/LLVM plugins rather than external Prolog files ...