Man1 - llvm-locstats.1

llvm-locstats - calculate statistics on DWARF debug location

llvm-locstats [/options/] [/filename/]

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.

–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)

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

Pretty print the location coverage on the standard output.

#+begin_quote

      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%
        =================================================

#+end_quote

Generate a plot as an image file.

#+begin_quote

      llvm-locstats --draw-plot file1.out

#+end_quote

[image]

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

#+begin_quote

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

#+end_quote

[image]

llvm-dwarfdump(1)

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

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