This is great Ed, thank you. Will review the PR soon. This will be very helpful 
to MADlib developers. 

NJ

Sent from my iPhone

> On Jul 14, 2017, at 11:14 PM, Ed Espino <esp...@apache.org> wrote:
> 
> Nandish,
> 
> For a very basic code coverage implementation using cmake, I have created:
> 
> * JIRA: https://issues.apache.org/jira/browse/MADLIB-1138
> * PR: https://github.com/apache/incubator-madlib/pull/151
> 
> This is a basic code coverage implementation runs on my mac using the
> following and a brew installed lcov module:
> 
> Configured with: --prefix=/Library/Developer/CommandLineTools/usr
> --with-gxx-include-dir=/usr/include/c++/4.2.1
> Apple LLVM version 8.1.0 (clang-802.0.42)
> Target: x86_64-apple-darwin16.6.0
> Thread model: posix
> InstalledDir: /Library/Developer/CommandLineTools/usr/bin
> 
> Regards,
> -=e
> 
>> On Fri, Jul 14, 2017 at 1:50 PM, Ed Espino <esp...@apache.org> wrote:
>> 
>> Sure NJ,
>> 
>> I'll create both (Jira and PR).
>> 
>> -=e
>> 
>> On Fri, Jul 14, 2017 at 1:46 PM, Nandish Jayaram <njaya...@pivotal.io>
>> wrote:
>> 
>>> Thank you Ed, this is great. We will create a JIRA to incorporate this
>>> (including documenting the steps to use it). Or, you can also create a PR.
>>> :)
>>> 
>>> NJ
>>> 
>>>> On Fri, Jul 14, 2017 at 12:31 PM, Ed Espino <esp...@apache.org> wrote:
>>>> 
>>>> NJ,
>>>> 
>>>> I spent about an hour getting it setup on my mac.  This supported the
>>>> MLP PR review. I threw some info together below.
>>>> 
>>>> Hope it helps,
>>>> -=e
>>>> 
>>>> ------------------
>>>> 
>>>> Add lcov through brew (brings in lcov and genhtml utilities):
>>>>  brew install lcov
>>>> 
>>>> "Total HACK" to add code coverage support into the build for C/C++
>>>> code. This is quick and dirty so I could get to the data I needed for
>>>> the PR review.
>>>> 
>>>>  diff --git a/CMakeLists.txt b/CMakeLists.txt
>>>>  index b2172ef3..db80986c 100644
>>>>  --- a/CMakeLists.txt
>>>>  +++ b/CMakeLists.txt
>>>>  @@ -104,7 +104,7 @@ if(CMAKE_COMPILER_IS_GNUCXX)
>>>>           set(CMAKE_INCLUDE_SYSTEM_FLAG_CXX "-isystem ")
>>>>       endif(APPLE)
>>>>   elseif(CMAKE_C_COMPILER_ID MATCHES "Clang")
>>>>  -    set(CMAKE_CXX_FLAGS "-stdlib=libstdc++")
>>>>  +    set(CMAKE_CXX_FLAGS "-stdlib=libstdc++ -fprofile-arcs
>>>> -ftest-coverage")
>>>>   endif(CMAKE_COMPILER_IS_GNUCXX)
>>>> 
>>>>   # force a `m4_' prefix to all builtins
>>>>  @@ -114,6 +114,8 @@ else()
>>>>   set(M4_ARGUMENTS "--prefix-builtins")
>>>>   endif()
>>>> 
>>>>  +set(CMAKE_C_FLAGS "-fprofile-arcs -ftest-coverage")
>>>>  +
>>>>   # Read and parse Version.yml file
>>>>   file(READ "${MADLIB_VERSION_YML}" _MADLIB_VERSION_CONTENTS)
>>>>   string(REGEX REPLACE "^.*version:[ \t]*([^\n]*)\n.*" "\\1"
>>>> MADLIB_VERSION_STRING "${_MADLIB_VERSION_CONTENTS}")
>>>> 
>>>> Once MADlib is built and installed, run your tests:
>>>> 
>>>>  ## Build and install MADlib
>>>>  mkdir build
>>>>  cd build
>>>>  cmake ..
>>>>  make -j8 install
>>>>  /usr/local/madlib/bin/madpack -s madlib -p postgres install
>>>> 
>>>>  ## At this point you can run your tests (I'm focusing on MLP)
>>>> 
>>>>  /usr/local/madlib/bin/madpack -s madlib -p postgres install-check -t
>>>> convex/mlp
>>>> 
>>>>  ## Time to capture the results and generate html report.
>>>> 
>>>>  lcov --capture --directory . --output-file coverage.info
>>>>  genhtml coverage.info --output-directory gcov
>>>> 
>>>>  # You will notice there is some uninteresting system coverage info.
>>>>  # The following will filter them out.
>>>> 
>>>>  lcov --remove coverage.info '/usr/include/*' '/usr/local/include/*'
>>>> '/usr/local/postgres/*' '*build/third_party/*' -o
>>> coverage_filtered.info
>>>>  rm -rf gcov
>>>>  genhtml coverage_filtered.info --output-directory gcov
>>>> 
>>>> It is possible to zero out the counters with the following.
>>>>   lcov --zerocounters --directory .
>>>> 
>>>> 
>>>> On Fri, Jul 14, 2017 at 12:23 PM, Nandish Jayaram <njaya...@pivotal.io>
>>>> wrote:
>>>> 
>>>>> Hi Ed,
>>>>> 
>>>>> We haven't set that up for MADlib yet, but we will be looking into it
>>>> soon.
>>>>> Any ideas?
>>>>> 
>>>>> NJ
>>>>> 
>>>>> On Fri, Jul 14, 2017 at 10:00 AM, Ed Espino <esp...@apache.org>
>>> wrote:
>>>>> 
>>>>>> Out of curiosity, do MADlib developers regularly use code coverage
>>>>>> utilities to measure the coverage quality of their tests?
>>>>>> 
>>>>>> -=e
>>>>>> 
>>>>>> --
>>>>>> *Ed Espino*
>>>>>> 
>>>>> 
>>>> 
>>>> 
>>>> 
>>>> --
>>>> *Ed Espino*
>>>> 
>>> 
>> 
>> 
>> 
>> --
>> *Ed Espino*
>> 
> 
> 
> 
> -- 
> *Ed Espino*

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