clang: support gcov ARM LLVM clang supports code coverage detection

libs/libbuiltin/Kconfig

@@ -33,4 +33,8 @@ config COMPILER_RT_HAS_BFLOAT16
 	bool "Enable support for bfloat16 in Compiler-rt"
 	default n
 
+config COMPILER_RT_PROFILE
+	bool "Enable profiling support in Compiler-rt"
+	default n
+
 endif # BUILTIN_COMPILER_RT

libs/libbuiltin/compiler-rt/CMakeLists.txt

@@ -406,6 +406,46 @@ if(CONFIG_BUILTIN_COMPILER_RT)
     list(APPEND RT_BUILTIN_SRCS floatundidf.c floatundisf.c floatundixf.c)
   endif()
 
+  if(CONFIG_COMPILER_RT_PROFILE)
+
+    target_include_directories(
+      compiler-rt PRIVATE ${CMAKE_CURRENT_LIST_DIR}/compiler-rt/lib/profile)
+
+    target_compile_options(
+      compiler-rt
+      PRIVATE -DCOMPILER_RT_HAS_UNAME
+              -Wno-cleardeprecated-pragma
+              -Wno-deprecated-pragma
+              -Wno-incompatible-pointer-types
+              -Wno-shadow
+              -Wno-strict-prototypes
+              -Wno-undef
+              -Wno-unknown-warning-option)
+
+    set(RT_PROFILE_SRCS
+        GCDAProfiling.c
+        InstrProfiling.c
+        InstrProfilingBuffer.c
+        InstrProfilingFile.c
+        InstrProfilingInternal.c
+        InstrProfilingMerge.c
+        InstrProfilingMergeFile.c
+        InstrProfilingNameVar.c
+        InstrProfilingUtil.c
+        InstrProfilingValue.c
+        InstrProfilingVersionVar.c
+        InstrProfilingWriter.c
+        InstrProfilingRuntime.cpp)
+
+    foreach(src ${RT_PROFILE_SRCS})
+      string(PREPEND src ${CMAKE_CURRENT_LIST_DIR}/compiler-rt/lib/profile/)
+      list(APPEND COMPILER_RT_SRCS ${src})
+    endforeach()
+
+    list(APPEND COMPILER_RT_SRCS InstrProfilingPlatform.c)
+
+  endif()
+
   list(APPEND INCDIR
        ${CMAKE_CURRENT_LIST_DIR}/compiler-rt/lib/builtins/${RT_BUILTIN_ARCH})
 

libs/libbuiltin/compiler-rt/InstrProfilingPlatform.c

@@ -0,0 +1,129 @@
+/****************************************************************************
+ * libs/libbuiltin/compiler-rt/InstrProfilingPlatform.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <stdlib.h>
+#include <stdio.h>
+
+#include "InstrProfiling.h"
+#include "InstrProfilingInternal.h"
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+extern char __start__llvm_prf_names[];
+extern char __end__llvm_prf_names[];
+extern char __start__llvm_prf_data[];
+extern char __end__llvm_prf_data[];
+extern char __start__llvm_prf_cnts[];
+extern char __end__llvm_prf_cnts[];
+
+COMPILER_RT_VISIBILITY ValueProfNode *CurrentVNode = 0;
+COMPILER_RT_VISIBILITY ValueProfNode *EndVNode = 0;
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+COMPILER_RT_VISIBILITY
+void __llvm_profile_register_function(void *Data_)
+{
+}
+
+COMPILER_RT_VISIBILITY
+void __llvm_profile_register_names_function(void *NamesStart,
+                                            uint64_t NamesSize)
+{
+}
+
+COMPILER_RT_VISIBILITY
+const __llvm_profile_data *__llvm_profile_begin_data(void)
+{
+  return &__start__llvm_prf_data;
+}
+
+COMPILER_RT_VISIBILITY
+const __llvm_profile_data *__llvm_profile_end_data(void)
+{
+  return &__end__llvm_prf_data;
+}
+
+COMPILER_RT_VISIBILITY
+const char *__llvm_profile_begin_names(void)
+{
+  return &__start__llvm_prf_names;
+}
+
+COMPILER_RT_VISIBILITY
+const char *__llvm_profile_end_names(void)
+{
+  return &__end__llvm_prf_names;
+}
+
+COMPILER_RT_VISIBILITY
+char *__llvm_profile_begin_counters(void)
+{
+  return &__start__llvm_prf_cnts;
+}
+
+COMPILER_RT_VISIBILITY
+char *__llvm_profile_end_counters(void)
+{
+  return &__end__llvm_prf_cnts;
+}
+
+COMPILER_RT_VISIBILITY
+char *__llvm_profile_begin_bitmap(void)
+{
+  return 0;
+}
+
+COMPILER_RT_VISIBILITY
+char *__llvm_profile_end_bitmap(void)
+{
+  return 0;
+}
+
+COMPILER_RT_VISIBILITY
+uint32_t *__llvm_profile_begin_orderfile(void)
+{
+  return 0;
+}
+
+COMPILER_RT_VISIBILITY
+ValueProfNode *__llvm_profile_begin_vnodes(void)
+{
+  return 0;
+}
+
+COMPILER_RT_VISIBILITY
+ValueProfNode *__llvm_profile_end_vnodes(void)
+{
+  return 0;
+}
+
+COMPILER_RT_VISIBILITY int __llvm_write_binary_ids(ProfDataWriter *Writer)
+{
+  return 0;
+}

libs/libbuiltin/compiler-rt/Make.defs

@@ -149,6 +149,36 @@ else
   CSRCS += floatundidf.c floatundisf.c floatundixf.c
 endif
 
+ifeq ($(CONFIG_COMPILER_RT_PROFILE),y)
+
+# Include paths
+FLAGS += ${INCDIR_PREFIX}$(CURDIR)/compiler-rt/compiler-rt/lib/profile
+
+# Suppress specific warnings
+FLAGS += -Wno-cleardeprecated-pragma -Wno-deprecated-pragma -Wno-incompatible-pointer-types
+FLAGS += -Wno-shadow -Wno-strict-prototypes -Wno-undef -Wno-unknown-warning-option
+
+# Define compiler-specific macros
+FLAGS += -DCOMPILER_RT_HAS_UNAME
+
+# Disable code coverage analysis for the library
+FLAGS += -fno-profile-generate
+
+# Profile support source files
+CSRCS += GCDAProfiling.c InstrProfilingBuffer.c InstrProfiling.c InstrProfilingFile.c InstrProfilingInternal.c
+CSRCS += InstrProfilingMerge.c InstrProfilingMergeFile.c InstrProfilingNameVar.c
+CSRCS += InstrProfilingUtil.c InstrProfilingValue.c InstrProfilingVersionVar.c InstrProfilingWriter.c
+CPPSRCS += InstrProfilingRuntime.cpp
+
+# Profile platform support
+CSRCS += InstrProfilingPlatform.c
+
+# Dependency and search paths
+DEPPATH += --dep-path compiler-rt/compiler-rt/lib/profile
+VPATH += :compiler-rt/compiler-rt/lib/profile
+
+endif
+
 FLAGS += ${INCDIR_PREFIX}$(CURDIR)/compiler-rt/compiler-rt/lib/builtins/${ARCH}
 
 AFLAGS += $(FLAGS)
@@ -160,3 +190,6 @@ VPATH += :compiler-rt/compiler-rt/lib/builtins/${ARCH}
 
 DEPPATH += --dep-path compiler-rt/compiler-rt/lib/builtins
 VPATH += :compiler-rt/compiler-rt/lib/builtins
+
+DEPPATH += --dep-path compiler-rt
+VPATH += :compiler-rt

tools/nxstyle.c

@@ -643,6 +643,13 @@ static const char *g_white_files[] =
   "arm-acle-compat.h",
   "arm_asm.h",
 
+  /* Skip Mixed case
+   * Ref:
+   * libs/libbuiltin/
+   */
+
+  "InstrProfilingPlatform.c",
+
   /* Skip Mixed case
    * arch/arm/src/phy62xx/uart.c:1229:13: error: Mixed case identifier found
    */