Add nogil tracing

python/.gitignore

@@ -29,10 +29,11 @@ build
 dist
 # Egg metadata
 *.egg-info
-# coverage
+# Coverage
 .coverage
 coverage.xml
-# cache
+htmlcov
+# Cache
 .cache
 
 # benchmark working dir
@@ -43,4 +44,4 @@ pyarrow/_table_api.h
 manylinux1/arrow
 
 # plasma store
-pyarrow/plasma_store
+pyarrow/plasma_store

python/CMakeLists.txt

@@ -469,7 +469,7 @@ foreach(module ${CYTHON_EXTENSIONS})
 
     if (PYARROW_GENERATE_COVERAGE)
       set_target_properties(${module_name} PROPERTIES
-        COMPILE_DEFINITIONS "CYTHON_TRACE=1")
+        COMPILE_DEFINITIONS "CYTHON_TRACE=1;CYTHON_TRACE_NOGIL=1")
     endif()
 
     target_link_libraries(${module_name} ${LINK_LIBS})