Use JIT Plug-in for coverage to cover JIT'd functions and methods (#56310)

Summary:
This PR is step 2 (after https://github.com/pytorch/pytorch/issues/56708) to having JIT coverage--it actually uses the plug-in in CI!

Disclaimer: note that this will mark the entire JIT'd function/method as covered without seeking proof that the
compiled code has been executed. This means that even if the code chunk is merely compiled and not run, it will get
marked as covered.

Pull Request resolved: https://github.com/pytorch/pytorch/pull/56310

Test Plan:
We should see coverage improvements in CI after. A file to look out for would be `torch/jit/quantized.py`, which should have more coverage after this PR, which it does!
d3283ccd8c/torch/jit/quantized.py vs https://codecov.io/gh/pytorch/pytorch/src/master/torch/jit/quantized.py

More generally, the whole jit folder got ~3% increase in coverage, I believe.

Reviewed By: walterddr

Differential Revision: D28000672

Pulled By: janeyx99

fbshipit-source-id: 6712979d63a5e1224a92ee9bd9679ec62cf1cbba

.circleci/docker/common/install_conda.sh

@@ -102,6 +102,7 @@ if [ -n "$ANACONDA_PYTHON_VERSION" ]; then
   # TODO: Why is scipy pinned
   # Pin MyPy version because new errors are likely to appear with each release
   # Pin hypothesis to avoid flakiness: https://github.com/pytorch/pytorch/issues/31136
+  # Pin coverage so we can use COVERAGE_RCFILE
   as_jenkins pip install --progress-bar off pytest \
     scipy==1.1.0 \
     scikit-image \
@@ -111,7 +112,7 @@ if [ -n "$ANACONDA_PYTHON_VERSION" ]; then
     llvmlite \
     unittest-xml-reporting \
     boto3==1.16.34 \
-    coverage \
+    coverage==5.5 \
     hypothesis==4.53.2 \
     mypy==0.812 \
     tb-nightly

.coveragerc

@@ -1,4 +1,6 @@
 [run]
+plugins =
+    coverage_plugins.jit_plugin
 omit =
     */tmp*
     */Temp/*

.jenkins/pytorch/test.sh

@@ -26,6 +26,7 @@ fi
 if [[ "$BUILD_ENVIRONMENT" == *coverage* ]]; then
   export PYTORCH_COLLECT_COVERAGE=1
   export COVERAGE_RCFILE="$PWD/.coveragerc" # coverage config file needed for plug-ins and settings to work
+  pip install -e tools/coverage_plugins_package # allows coverage to run with JitPlugin for JIT coverage
 fi
 
 if [[ "$BUILD_ENVIRONMENT" == *cuda* ]]; then

.jenkins/pytorch/win-test-helpers/setup_pytorch_env.bat

@@ -43,7 +43,8 @@ pip install "ninja==1.10.0.post1" future "hypothesis==4.53.2" "librosa>=0.6.2" p
 
 :: TODO: All sharded configs run coverage. We should change that to be only one config, but right now we will just
 :: install coverage everywhere. Tracked: https://github.com/pytorch/pytorch/issues/56264
-python -mpip install coverage
+python -mpip install coverage==5.5
+python -mpip install -e tools/coverage_plugins_package
 
 if %errorlevel% neq 0 ( exit /b %errorlevel% )
 

.jenkins/pytorch/win-test.sh

@@ -92,7 +92,8 @@ echo "TEST PASSED"
 
 if [[ "${BUILD_ENVIRONMENT}" == "pytorch-win-vs2019-cuda10-cudnn7-py3" ]]; then
   pushd "$TEST_DIR"
-  python -mpip install coverage
+  python -mpip install coverage==5.5
+  python -mpip install -e "$PROJECT_DIR/tools/coverage_plugins_package"
   echo "Generating XML coverage report"
   time python -mcoverage xml
   popd

scripts/onnx/test.sh

@@ -29,6 +29,7 @@ fi
 
 pip install pytest scipy hypothesis # these may not be necessary
 pip install pytest-cov # installing since `coverage run -m pytest ..` doesn't work
+pip install -e tools/coverage_plugins_package # allows coverage to run w/o failing due to a missing plug-in
 
 # realpath might not be available on MacOS
 script_path=$(python -c "import os; import sys; print(os.path.realpath(sys.argv[1]))" "${BASH_SOURCE[0]}")