cmake: introduce instrumentation flag

Introduce support for enabling the instrumentation flag.

Signed-off-by: Bjarki Arge Andreasen <[email protected]>

Author: bjarki-andreasen

CMakeLists.txt

@@ -468,6 +468,8 @@ zephyr_compile_options($<$<COMPILE_LANGUAGE:CXX>:$<TARGET_PROPERTY:compiler,no_p
 zephyr_link_libraries_ifndef(CONFIG_NATIVE_LIBRARY
                              $<TARGET_PROPERTY:linker,no_position_independent>)
 
+zephyr_compile_options($<$<COMPILE_LANGUAGE:C>:$<TARGET_PROPERTY:compiler,func_instrumentation>>)
+
 # Allow the user to inject options when calling cmake, e.g.
 # 'cmake -DEXTRA_CFLAGS="-Werror -Wno-deprecated-declarations" ..'
 include(cmake/extra_flags.cmake)

Kconfig.zephyr

@@ -538,6 +538,9 @@ config NO_OPTIMIZATIONS
 	  default stack sizes in order to avoid stack overflows.
 endchoice
 
+config INSTRUMENTATION
+	bool "Compile instrumentation"
+
 config LTO
 	bool "Link Time Optimization"
 	depends on !(GEN_ISR_TABLES || GEN_IRQ_VECTOR_TABLE) || ISR_TABLES_LOCAL_DECLARATION

cmake/compiler/compiler_flags_template.cmake

@@ -149,3 +149,6 @@ set_compiler_property(PROPERTY specs)
 
 # Compiler flag for defining preinclude files.
 set_compiler_property(PROPERTY include_file)
+
+# Compiler flag to enable function instrumentation
+set_compiler_property(PROPERTY func_instrumentation)

cmake/compiler/gcc/compiler_flags.cmake

@@ -255,3 +255,8 @@ set_compiler_property(PROPERTY no_builtin_malloc -fno-builtin-malloc)
 set_compiler_property(PROPERTY specs -specs=)
 
 set_compiler_property(PROPERTY include_file -include)
+
+# Compiler flag to enable function instrumentation
+if(CONFIG_INSTRUMENTATION)
+set_compiler_property(PROPERTY func_instrumentation -finstrument-functions)
+endif()

include/zephyr/toolchain/gcc.h

@@ -289,6 +289,8 @@ do {                                                                    \
 #define __attribute_nonnull(...) __attribute__((nonnull(__VA_ARGS__)))
 #endif
 
+#define __no_instrument_function __attribute__((__no_instrument_function__))
+
 /* Builtins with availability that depend on the compiler version. */
 #if __GNUC__ >= 5
 #define HAS_BUILTIN___builtin_add_overflow 1