Re: The usage of -dtrace-scheme-coverage in Lilypond

Re: The usage of -dtrace-scheme-coverage in Lilypond

[Han-Wen Nienhuys]

On Fri, Mar 11, 2011 at 12:21 AM, zhangxy <zhangxy290626683@gmail.com> wrote:
> Dear hanwen,
> Now I want to analyze the test coverage of Lilypond. I find the option
> -dtrace-scheme-coverage. It says that the option can record coverage of
> Scheme files in `FILE.cov'. Then I do the following
>>
>> lilypond -dtrace-scheme-coverage test.ly
>
> But it gives me the error
>>
>> throw from within critical section.

trace-scheme-coverage relies on a hack in the GUILE evaluator that I
added in 2007, which records a symbol's source location the moment
that symbol is looked up. The glue on the lilypond side is in
scm/coverage.scm. This feature was removed in 2010, when the GUILE
folks rewrote the evaluator, before ever seeing the light in a GUILE
release.

Apparently there is a new mechanism for finding coverage.  See
https://www.gnu.org/software/guile/manual/html_node/Code-Coverage.html
- perhaps you can work out a way with the guile folks to resurrect
lilypond's test coverage code.

-- 
Han-Wen Nienhuys - hanwen@xs4all.nl - http://www.xs4all.nl/~hanwen

Re: The usage of -dtrace-scheme-coverage in Lilypond

[Andy Wingo]

Hello zhangxy,

On Fri 11 Mar 2011 14:31, Han-Wen Nienhuys <hanwenn@gmail.com> writes:

> On Fri, Mar 11, 2011 at 12:21 AM, zhangxy <zhangxy290626683@gmail.com> wrote:
>> Now I want to analyze the test coverage of Lilypond.
>
> Apparently there is a new mechanism for finding coverage.  See
> https://www.gnu.org/software/guile/manual/html_node/Code-Coverage.html
> - perhaps you can work out a way with the guile folks to resurrect
> lilypond's test coverage code.

The code in Guile's `test-suite/guile-test' looks like this:

    (let-values (((coverage-data _)
                  (with-code-coverage (the-vm) run-tests)))
      (let ((out (open-output-file "guile.info")))
        (coverage-data->lcov coverage-data out)
        (close out)))

where `run-tests' is a thunk that runs the tests.

Andy
-- 
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