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llvm-locstats(1)

LLVM-LOCSTATS(1) LLVM LLVM-LOCSTATS(1)

NAME

llvm-locstats - calculate statistics on DWARF debug location

SYNOPSIS

llvm-locstats [options] [filename]

DESCRIPTION

llvm-locstats works like a wrapper around llvm-dwarfdump. It parses llvm-dwarfdump statistics regarding debug location by pretty printing it in a more human readable way.

The line 0% shows the number and the percentage of DIEs with no location information, but the line 100% shows the information for DIEs where there is location information in all code section bytes (where the variable or parameter is in the scope). The line [50%,60%) shows the number and the percentage of DIEs where the location information is between 50 and 60 percentage of its scope covered.

OPTIONS

--only-variables
calculate the location statistics only for local variables

--only-formal-parameters
calculate the location statistics only for formal parameters

--ignore-debug-entry-values
ignore the location statistics on locations containing the debug entry values DWARF operation

--draw-plot
make histogram of location buckets generated (requires matplotlib)

--compare
compare the debug location coverage on two files provided, and draw a plot showing the difference (requires matplotlib)

EXIT STATUS

llvm-locstats returns 0 if the input file were parsed successfully. Otherwise, it returns 1.

EXAMPLE 1

Pretty print the location coverage on the standard output.

llvm-locstats a.out


  =================================================


            Debug Location Statistics


  =================================================


        cov%          samples       percentage(~)


  -------------------------------------------------


     0%                    1              16%


     (0%,10%)              0               0%


     [10%,20%)             0               0%


     [20%,30%)             0               0%


     [30%,40%)             0               0%


     [40%,50%)             0               0%


     [50%,60%)             1              16%


     [60%,70%)             0               0%


     [70%,80%)             0               0%


     [80%,90%)             1              16%


     [90%,100%)            0               0%


     100%                  3              50%


  =================================================


  -the number of debug variables processed: 6


  -PC ranges covered: 81%


  -------------------------------------------------


  -total availability: 83%


  =================================================


EXAMPLE 2

Generate a plot as an image file.

llvm-locstats --draw-plot file1.out


[image]

EXAMPLE 3

Generate a plot as an image file showing the difference in the debug location coverage.

llvm-locstats --compare file1.out file1.withentryvals.out


[image]

SEE ALSO

llvm-dwarfdump(1)

AUTHOR

Maintained by the LLVM Team (https://llvm.org/).

COPYRIGHT

2003-2024, LLVM Project

2024-02-12 15