[LLVMdev] GCC compatibility code coverage issue .

[Umesh Kalappa]

Hi Justin ,

Thank you for the confirmation and we would like to know that ,going
forward the clang has the support the gcc gcov format or use the
-fprofile-instr-generate -fcoverage-mapping  and get ride of gcov
format .

We are planing to customize the clang code coverage for embedded world
,before we start tweaking the gcov / -fprofile-instr-generate
code-base ,we would like to take feedback from the group .

Did -fprofile-instr-generate -fcoverage-mapping better than(optimized
instrumented) gcov ? ,if so any benchmark reference will be
appreciated.

Thank you and awaiting for your suggestions.
~Umesh

On Wed, May 13, 2015 at 1:17 PM, Justin Bogner <mail at justinbogner.com> wrote:
> Yes, the fix for this is in the 3.6.1 release candidate.
>
>
> On Wednesday, May 13, 2015, Umesh Kalappa <umesh.kalappa0 at gmail.com> wrote:
>>
>> Hi Justin,
>>
>> How  you  doing there ?
>>
>> Do you able to fetch the changes w.r.t PR22436 to 4.6.1.
>>
>> Thank you
>> ~Umesh
>>
>> On Wed, Apr 29, 2015 at 7:42 PM, Justin Bogner <mail at justinbogner.com>
>> wrote:
>> > Oh, sorry, this is http://llvm.org/PR22436 which is fixed in trunk, but
>> > not
>> > in 3.6.0. I'll double-check / see about getting the fix in 3.6.1.
>> >
>> > On Tuesday, April 28, 2015, Umesh Kalappa <umesh.kalappa0 at gmail.com>
>> > wrote:
>> >>
>> >> Hi Justin ,
>> >>
>> >> Thank you for the reply,but without version too ,the llvm-cov fails i.e
>> >>
>> >> bash-4.1$ clang -fprofile-arcs -ftest-coverage test.c
>> >> bash-4.1$ ./a.out
>> >> bash-4.1$ llvm-cov gcov test.c
>> >> Unexpected number of edges (in main).
>> >> Invalid .gcda File!
>> >>
>> >> bash-4.1$ clang -g -O0 -fprofile-arcs -ftest-coverage -Xclang
>> >> -coverage-cfg-checksum -Xclang -coverage-no-function-names-in-data
>> >> test.c
>> >> bash-4.1$ ./a.out
>> >> bash-4.1$ llvm-cov gcov test.c
>> >> Unexpected end of memory buffer: 386832052.
>> >> Invalid .gcno File!
>> >>
>> >> bash-4.1$ clang -v
>> >> clang version 3.6.0 (tags/RELEASE_360/final)
>> >> Target: x86_64-unknown-linux-gnu
>> >> Thread model: posix
>> >>
>> >> Thank you
>> >> ~Umesh
>> >>
>> >> On Tue, Apr 28, 2015 at 8:32 PM, Justin Bogner
>> >> <justin at justinbogner.com>
>> >> wrote:
>> >> >
>> >> > On Tuesday, April 28, 2015, Umesh Kalappa <umesh.kalappa0 at gmail.com>
>> >> > wrote:
>> >> >>
>> >> >> Hi All,
>> >> >>
>> >> >> We trying  to use clang+llvm to generate the gcc  coverage format as
>> >> >>
>> >> >> clang version 3.6.0
>> >> >>
>> >> >> $clang  --coverage -Xclang -coverage-cfg-checksum -Xclang
>> >> >> -coverage-no-function-names-in-data -Xclang -coverage-version='407*'
>> >> >> test.c
>> >> >>
>> >> >> $a.out
>> >> >>
>> >> >> $llvm-cov gcov test.gcda
>> >> >>
>> >> >> Unexpected version: *704.
>> >> >> Invalid .gcno File!
>> >> >
>> >> >
>> >> > The llvm-cov tool supports the 402* format, which is what clang emits
>> >> > by
>> >> > default. If you remove the -Xclang arguments from your compilation it
>> >> > should
>> >> > work.
>> >> >
>> >> >>
>> >> >> Debugging the above cause ,But any hints from experts here ,will
>> >> >> help a
>> >> >> lot .
>> >> >>
>> >> >> Appreciate your time ,Thank you
>> >> >> ~Umesh
>> >> >> _______________________________________________
>> >> >> LLVM Developers mailing list
>> >> >> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
>> >> >> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev