Use C EventPipe implementation by default (#47665)

src/coreclr/clrdefinitions.cmake

@@ -104,9 +104,7 @@ add_definitions(-DFEATURE_DEFAULT_INTERFACES)
 if(FEATURE_EVENT_TRACE)
     add_compile_definitions($<$<NOT:$<BOOL:$<TARGET_PROPERTY:CROSSGEN_COMPONENT>>>:FEATURE_EVENT_TRACE>)
     add_definitions(-DFEATURE_PERFTRACING)
-    if(FEATURE_PERFTRACING_C_LIB)
-      add_definitions(-DFEATURE_PERFTRACING_C_LIB)
-    endif(FEATURE_PERFTRACING_C_LIB)
+    add_definitions(-DFEATURE_PERFTRACING_C_LIB)
 else(FEATURE_EVENT_TRACE)
     add_custom_target(eventing_headers) # add a dummy target to avoid checking for FEATURE_EVENT_TRACE in multiple places
 endif(FEATURE_EVENT_TRACE)

src/coreclr/debug/debug-pal/CMakeLists.txt

@@ -4,26 +4,20 @@ include_directories(../../pal/inc)
 
 add_definitions(-DPAL_STDCPP_COMPAT)
 
-if(FEATURE_PERFTRACING_C_LIB)
-    set(SHARED_EVENTPIPE_DIR ${CLR_SRC_NATIVE_DIR}/eventpipe)
-    include_directories(${SHARED_EVENTPIPE_DIR})
-    add_definitions(-DFEATURE_CORECLR)
-    add_definitions(-DFEATURE_PERFTRACING)
-    add_definitions(-DFEATURE_PERFTRACING_C_LIB)
-    add_definitions(-DFEATURE_PERFTRACING_C_LIB_STANDALONE_PAL)
-endif(FEATURE_PERFTRACING_C_LIB)
+
+set(SHARED_EVENTPIPE_DIR ${CLR_SRC_NATIVE_DIR}/eventpipe)
+include_directories(${SHARED_EVENTPIPE_DIR})
+add_definitions(-DFEATURE_CORECLR)
+add_definitions(-DFEATURE_PERFTRACING)
+add_definitions(-DFEATURE_PERFTRACING_STANDALONE_PAL)
 
 if(CLR_CMAKE_HOST_WIN32)
     add_definitions(-DWIN32_LEAN_AND_MEAN)
     include_directories(../../inc) #needed for warning control
 
     if(CLR_CMAKE_TARGET_WIN32)
-        if(FEATURE_PERFTRACING_C_LIB)
             set (EVENTPIPE_PAL_SOURCES "${SHARED_EVENTPIPE_DIR}/ds-ipc-win32.c")
             set_source_files_properties(${EVENTPIPE_PAL_SOURCES} PROPERTIES LANGUAGE CXX)
-        else(FEATURE_PERFTRACING_C_LIB)
-            set (EVENTPIPE_PAL_SOURCES "win/diagnosticsipc.cpp")
-        endif(FEATURE_PERFTRACING_C_LIB)
 
         set(TWO_WAY_PIPE_SOURCES
             ${EVENTPIPE_PAL_SOURCES}
@@ -42,13 +36,9 @@ if(CLR_CMAKE_HOST_UNIX)
     add_definitions(-DPAL_IMPLEMENTATION)
     add_definitions(-D_POSIX_C_SOURCE=200809L)
 
-    if(FEATURE_PERFTRACING_C_LIB)
-        set (EVENTPIPE_PAL_SOURCES "${SHARED_EVENTPIPE_DIR}/ds-ipc-posix.c")
-        set_source_files_properties(${EVENTPIPE_PAL_SOURCES} PROPERTIES LANGUAGE CXX)
-        set_source_files_properties(${EVENTPIPE_PAL_SOURCES} PROPERTIES COMPILE_OPTIONS -xc++)
-    else(FEATURE_PERFTRACING_C_LIB)
-        set (EVENTPIPE_PAL_SOURCES "unix/diagnosticsipc.cpp")
-    endif(FEATURE_PERFTRACING_C_LIB)
+    set (EVENTPIPE_PAL_SOURCES "${SHARED_EVENTPIPE_DIR}/ds-ipc-posix.c")
+    set_source_files_properties(${EVENTPIPE_PAL_SOURCES} PROPERTIES LANGUAGE CXX)
+    set_source_files_properties(${EVENTPIPE_PAL_SOURCES} PROPERTIES COMPILE_OPTIONS -xc++)
 
     set(TWO_WAY_PIPE_SOURCES
       ${EVENTPIPE_PAL_SOURCES}

src/coreclr/vm/CMakeLists.txt

@@ -30,19 +30,13 @@ if(FEATURE_JIT_PITCHING)
 endif(FEATURE_JIT_PITCHING)
 
 if(FEATURE_PERFTRACING)
-  if(FEATURE_PERFTRACING_C_LIB)
     set(SHARED_EVENTPIPE_DIR ${CLR_SRC_NATIVE_DIR}/eventpipe)
     set(CORECLR_EVENTPIPE_SHIM_DIR ${CMAKE_CURRENT_SOURCE_DIR}/eventing/eventpipe)
-  else(FEATURE_PERFTRACING_C_LIB)
-    set(SHARED_EVENTPIPE_DIR ${VM_DIR})
-  endif(FEATURE_PERFTRACING_C_LIB)
 endif(FEATURE_PERFTRACING)
 
 if(FEATURE_PERFTRACING)
-  if(FEATURE_PERFTRACING_C_LIB)
     include_directories(${SHARED_EVENTPIPE_DIR})
     include_directories(${CORECLR_EVENTPIPE_SHIM_DIR})
-  endif(FEATURE_PERFTRACING_C_LIB)
 endif(FEATURE_PERFTRACING)
 
 set(VM_SOURCES_DAC_AND_WKS_COMMON