Hi Gua Guo,

I would propose that we make this easier for both the local user and the CI system to get coverage metrics. 

Can you review this commit as it uses the same Edk2 plugins but adds code coverage support with GCC5:

Merged PR 5008: Initial implementation or code coverage on basecore u… · microsoft/mu_basecore@f6af51f (github.com)

Thanks

Sean

From: Gua Guo <gua.guo@intel.com>

In order to collect code coverage after running executable

file, generate *.gcda and *.gcno file that require by lcov tool

to generate code coverage report.

Cc: Michael D Kinney <michael.d.kinney@intel.com>

Cc: Sean Brogan <sean.brogan@microsoft.com>

Cc: Bret Barkelew <Bret.Barkelew@microsoft.com>

Cc: Michael Kubacki <mikuback@linux.microsoft.com>

Signed-off-by: Gua Guo <gua.guo@intel.com>

---

 UnitTestFrameworkPkg/ReadMe.md                        | 116 +++++++++++++++++++-

 UnitTestFrameworkPkg/UnitTestFrameworkPkgHost.dsc.inc |   2 +-

 2 files changed, 116 insertions(+), 2 deletions(-)

diff --git a/UnitTestFrameworkPkg/ReadMe.md b/UnitTestFrameworkPkg/ReadMe.md

index e696412cb3..93fdacfc4a 100644

--- a/UnitTestFrameworkPkg/ReadMe.md

+++ b/UnitTestFrameworkPkg/ReadMe.md

@@ -361,7 +361,7 @@ RUNNING TEST SUITE: Int Safe Conversions Test Suite

 ```

 You can also, if you are so inclined, read the output from the exact instance of the test that was run during

-`stuart_ci_build`. The ouput file can be found on a path that looks like:

+`stuart_ci_build`. The output file can be found on a path that looks like:

 `Build/<Package>/HostTest/<Arch>/<TestName>.<TestSuiteName>.<Arch>.result.xml`

@@ -399,6 +399,120 @@ CMOCKA_XML_FILE=<absolute or relative path to output file>

 This mode is used by the test running plugin to aggregate the results for CI test status reporting in the web view.

+### Enable Code Coverage for GCC host-based tests

+

+LCOV is an extension of GCOV, a GNU tool which provides information about what parts of a program are actually executed (i.e. "covered") while running a particular test case. The extension consists of a set of scripts which build on the textual GCOV output to implement it.

+

+Documentation for LCOV can be found here:

+https://lcov.readthedocs.io/

+

+You can follow below steps to generate your code coverage report.

+

+

+

+```bash

+user@linux_machine:~/_uefi$stuart_ci_build -c .pytool/CISettings.py TOOL_CHAIN_TAG=GCC5 -p MdePkg -t NOOPT

+...

+user@linux_machine:~/_uefi$lcov -c --rc lcov_branch_coverage=1 -o UnitTest.info -d Build/MdePkg/HostTest/NOOPT_GCC5/X64/MdePkg/

+Capturing coverage data from Build/MdePkg/HostTest/NOOPT_GCC5/X64/MdePkg/

+Found gcov version: 9.4.0

+Using intermediate gcov format

+Scanning Build/MdePkg/HostTest/NOOPT_GCC5/X64/MdePkg/ for .gcda files ...

+Found 38 data files in Build/MdePkg/HostTest/NOOPT_GCC5/X64/MdePkg/

+Processing Library/BaseLib/UnitTestHostBaseLib/OUTPUT/RShiftU64.gcda

+Processing Library/BaseLib/UnitTestHostBaseLib/OUTPUT/Math64.gcda

+Processing Library/BaseLib/UnitTestHostBaseLib/OUTPUT/SafeString.gcda

+Processing Library/BaseLib/UnitTestHostBaseLib/OUTPUT/SwapBytes32.gcda

+Processing Library/BaseLib/UnitTestHostBaseLib/OUTPUT/CpuDeadLoop.gcda

+Processing Library/BaseLib/UnitTestHostBaseLib/OUTPUT/MultU64x64.gcda

+Processing Library/BaseLib/UnitTestHostBaseLib/OUTPUT/LongJump.gcda

+Processing Library/BaseLib/UnitTestHostBaseLib/OUTPUT/SetJump.gcda

+Processing Library/BaseLib/UnitTestHostBaseLib/OUTPUT/BitField.gcda

+Processing Library/BaseLib/UnitTestHostBaseLib/OUTPUT/String.gcda

+Processing Library/BaseLib/UnitTestHostBaseLib/OUTPUT/DivU64x32Remainder.gcda

+Processing Library/BaseLib/UnitTestHostBaseLib/OUTPUT/X64/GccInline.gcda

+Processing Library/BaseLib/UnitTestHostBaseLib/OUTPUT/MultU64x32.gcda

+Processing Library/BaseLib/UnitTestHostBaseLib/OUTPUT/MultS64x64.gcda

+Processing Library/BaseLib/UnitTestHostBaseLib/OUTPUT/LinkedList.gcda

+Processing Library/BaseLib/UnitTestHostBaseLib/OUTPUT/LShiftU64.gcda

+Processing Library/BaseLib/UnitTestHostBaseLib/OUTPUT/DivU64x32.gcda

+Processing Library/BaseLib/UnitTestHostBaseLib/OUTPUT/SwapBytes16.gcda

+Processing Library/BaseLib/UnitTestHostBaseLib/OUTPUT/Unaligned.gcda

+Processing Library/BaseLib/UnitTestHostBaseLib/OUTPUT/CheckSum.gcda

+Processing Library/BaseMemoryLib/BaseMemoryLib/OUTPUT/CopyMem.gcda

+Processing Library/BaseMemoryLib/BaseMemoryLib/OUTPUT/MemLibGuid.gcda

+Processing Library/BaseMemoryLib/BaseMemoryLib/OUTPUT/CompareMemWrapper.gcda

+Processing Library/BaseMemoryLib/BaseMemoryLib/OUTPUT/SetMemWrapper.gcda

+Processing Library/BaseMemoryLib/BaseMemoryLib/OUTPUT/SetMem64Wrapper.gcda

+Processing Library/BaseMemoryLib/BaseMemoryLib/OUTPUT/MemLibGeneric.gcda

+Processing Library/BaseMemoryLib/BaseMemoryLib/OUTPUT/CopyMemWrapper.gcda

+Processing Library/BaseMemoryLib/BaseMemoryLib/OUTPUT/SetMem.gcda

+Processing Library/BaseMemoryLib/BaseMemoryLib/OUTPUT/ZeroMemWrapper.gcda

+Processing Library/BasePrintLib/BasePrintLib/OUTPUT/PrintLibInternal.gcda

+Processing Library/BasePrintLib/BasePrintLib/OUTPUT/PrintLib.gcda

+Processing Library/BaseSafeIntLib/BaseSafeIntLib/OUTPUT/SafeIntLib64.gcda

+Processing Library/BaseSafeIntLib/BaseSafeIntLib/OUTPUT/SafeIntLib.gcda

+Processing Test/UnitTest/Library/BaseLib/BaseLibUnitTestsHost/OUTPUT/Base64UnitTest.gcda

+Processing Test/UnitTest/Library/BaseLib/BaseLibUnitTestsHost/OUTPUT/AutoGen.gcda

+Processing Test/UnitTest/Library/BaseSafeIntLib/TestBaseSafeIntLibHost/OUTPUT/SafeIntLibUintnIntnUnitTests64.gcda

+Processing Test/UnitTest/Library/BaseSafeIntLib/TestBaseSafeIntLibHost/OUTPUT/TestBaseSafeIntLib.gcda

+Processing Test/UnitTest/Library/BaseSafeIntLib/TestBaseSafeIntLibHost/OUTPUT/AutoGen.gcda

+

+user@linux_machine:~/_uefi$genhtml UnitTest.info --branch-coverage -o Build/UnitTestReport

+

+Reading data file UnitTest.info

+Found 38 entries.

+Found common filename prefix "~/_uefi/MdePkg/Library"

+Writing .css and .png files.

+Generating output.

+Processing file ~/_uefi/Build/MdePkg/HostTest/NOOPT_GCC5/X64/MdePkg/Test/UnitTest/Library/BaseLib/BaseLibUnitTestsHost/DEBUG/AutoGen.c

+Processing file ~/_uefi/Build/MdePkg/HostTest/NOOPT_GCC5/X64/MdePkg/Test/UnitTest/Library/BaseSafeIntLib/TestBaseSafeIntLibHost/DEBUG/AutoGen.c

+Processing file BaseLib/Unaligned.c

+Processing file BaseLib/CheckSum.c

+Processing file BaseLib/BitField.c

+Processing file BaseLib/DivU64x32.c

+Processing file BaseLib/CpuDeadLoop.c

+Processing file BaseLib/LongJump.c

+Processing file BaseLib/MultU64x64.c

+Processing file BaseLib/RShiftU64.c

+Processing file BaseLib/SwapBytes32.c

+Processing file BaseLib/SwapBytes16.c

+Processing file BaseLib/SetJump.c

+Processing file BaseLib/LinkedList.c

+Processing file BaseLib/LShiftU64.c

+Processing file BaseLib/SafeString.c

+Processing file BaseLib/String.c

+Processing file BaseLib/DivU64x32Remainder.c

+Processing file BaseLib/MultS64x64.c

+Processing file BaseLib/MultU64x32.c

+Processing file BaseLib/Math64.c

+Processing file BaseLib/X64/GccInline.c

+Processing file BaseMemoryLib/SetMemWrapper.c

+Processing file BaseMemoryLib/CompareMemWrapper.c

+Processing file BaseMemoryLib/SetMem64Wrapper.c

+Processing file BaseMemoryLib/ZeroMemWrapper.c

+Processing file BaseMemoryLib/CopyMemWrapper.c

+Processing file BaseMemoryLib/CopyMem.c

+Processing file BaseMemoryLib/SetMem.c

+Processing file BaseMemoryLib/MemLibGuid.c

+Processing file BaseMemoryLib/MemLibGeneric.c

+Processing file BasePrintLib/PrintLib.c

+Processing file BasePrintLib/PrintLibInternal.c

+Processing file BaseSafeIntLib/SafeIntLib64.c

+Processing file BaseSafeIntLib/SafeIntLib.c

+Processing file ~/_uefi/MdePkg/Test/UnitTest/Library/BaseLib/Base64UnitTest.c

+Processing file ~/_uefi/MdePkg/Test/UnitTest/Library/BaseSafeIntLib/TestBaseSafeIntLib.c

+Processing file ~/_uefi/MdePkg/Test/UnitTest/Library/BaseSafeIntLib/SafeIntLibUintnIntnUnitTests64.c

+Writing directory view page.

+Overall coverage rate:

+  lines......: 58.6% (2688 of 4589 lines)

+  functions..: 57.1% (249 of 436 functions)

+  branches...: 25.3% (1062 of 4195 branches)

+

+...

+

+```

+

 ### Important Note

 This works on both Windows and Linux, but is currently limited to x64 architectures. Working on getting others, but we

diff --git a/UnitTestFrameworkPkg/UnitTestFrameworkPkgHost.dsc.inc b/UnitTestFrameworkPkg/UnitTestFrameworkPkgHost.dsc.inc

index 4dd8d4ac67..8623aecb33 100644

--- a/UnitTestFrameworkPkg/UnitTestFrameworkPkgHost.dsc.inc

+++ b/UnitTestFrameworkPkg/UnitTestFrameworkPkgHost.dsc.inc

@@ -19,7 +19,7 @@

   MemoryAllocationLib|UnitTestFrameworkPkg/Library/Posix/MemoryAllocationLibPosix/MemoryAllocationLibPosix.inf

 [BuildOptions]

-  GCC:*_*_*_CC_FLAGS = -fno-pie

+  GCC:*_*_*_CC_FLAGS = -fno-pie -ftest-coverage -fprofile-arcs

 !ifdef $(UNIT_TESTING_DEBUG)

   MSFT:*_*_*_CC_FLAGS  = -D UNIT_TESTING_DEBUG=1

   GCC:*_*_*_CC_FLAGS   = -D UNIT_TESTING_DEBUG=1