llvm dev - Sep 2018 - Coverage report. Clang-7.0.

?Hi!


I want to build coverage report of a program compiled with clang-7.0 in html.


My goal is to get summary report with information about coverage of source code
files and links to them something like this https://llvm.org/reports/coverage/

I have found several ways to do so, correct me please if I'm wrong:

  1.  ?co?mpile 'clang --coverage' and then, after getting .gcno and
.gcda files use lcov or gcovr based on gcov of version 4.2?
BUT
I can't make a report with gcov of version 7.3.0 or 5.5.0. Is there any way
to generate html from .gcov files??

  2.  compile 'clang -fsanitize-coverage=...', get .sancov files, make
.symcov files and display them via coverage-report-server.py
BUT
I can't get .sancov files because clang-7.0 gives an error
'.text.sancov.module_ctor' referenced in section
'.init_array.[sancov.module_ctor.]' of obj.o:
defined in discarded section .text.sancov.module_ctor.[sancov.module_ctor]'.
Actually I just need a set of html-files and html-index instead of a server.

  3.  compile 'clang -fcoverage-mapping -fprofile-instr-generate', get
.profraw file, make .profdata file, then use llvm-cov to get html file for every
file of src
BUT
It is possible to get html file for every source file, but it is impossible to
get a summary report in html because of
error 'HTML output for summary reports is not yet supported.'

?All of them look strange, so please, give me some advice or share your
experience.
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Hi,
> On Sep 27, 2018, at 2:45 AM, Maksim Bakirov via llvm-dev <llvm-dev at
lists.llvm.org> wrote:
> 
> ​Hi! 
> 
> I want to build coverage report of a program compiled with clang-7.0 in
html.
> 
> My goal is to get summary report with information about coverage of source
code files and links to them something like this
https://llvm.org/reports/coverage/ <https://llvm.org/reports/coverage/>
> 
> I have found several ways to do so, correct me please if I'm wrong:
> ​co​mpile 'clang --coverage' and then, after getting .gcno and
.gcda files use lcov or gcovr based on gcov of version 4.2​
> BUT 
> I can't make a report with gcov of version 7.3.0 or 5.5.0. Is there any
way to generate html from .gcov files?​
> 
> compile 'clang -fsanitize-coverage=...', get .sancov files, make
.symcov files and display them via coverage-report-server.py
> BUT 
> I can't get .sancov files because clang-7.0 gives an error
'.text.sancov.module_ctor' referenced in section
'.init_array.[sancov.module_ctor.]' of obj.o:
> defined in discarded section
.text.sancov.module_ctor.[sancov.module_ctor]'.
> Actually I just need a set of html-files and html-index instead of a
server.
> 
> compile 'clang -fcoverage-mapping -fprofile-instr-generate', get
.profraw file, make .profdata file, then use llvm-cov to get html file for every
file of src
> BUT 
> It is possible to get html file for every source file, but it is impossible
to get a summary report in html because of
> error 'HTML output for summary reports is not yet supported.’
llvm-cov emits an index page which summarizes coverage across the program
whenever it’s writing out a directory of coverage reports, see e.g
http://lab.llvm.org:8080/coverage/coverage-reports/llvm/index.html
<http://lab.llvm.org:8080/coverage/coverage-reports/llvm/index.html>.

vedant

> ​All of them look strange, so please, give me some advice or share your
experience.
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> LLVM Developers mailing list
> llvm-dev at lists.llvm.org <mailto:llvm-dev at lists.llvm.org>
> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
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