Hi Emese, 2016-03-07 8:05 GMT+09:00 Emese Revfy <re.emese@xxxxxxxxx>: > Add a very simple plugin to demonstrate the GCC plugin infrastructure. This GCC > plugin computes the cyclomatic complexity of each function. > > The complexity M of a function's control flow graph is defined as: > M = E - N + 2P > where > E = the number of edges > N = the number of nodes > P = the number of connected components (exit nodes). > > Signed-off-by: Emese Revfy <re.emese@xxxxxxxxx> > --- > arch/Kconfig | 12 +++++++ > scripts/Makefile.gcc-plugins | 6 +++- > tools/gcc/Makefile | 4 +++ > tools/gcc/cyc_complexity_plugin.c | 73 +++++++++++++++++++++++++++++++++++++++ > 4 files changed, 94 insertions(+), 1 deletion(-) > create mode 100644 tools/gcc/cyc_complexity_plugin.c > > diff --git a/arch/Kconfig b/arch/Kconfig > index e090642..59bde9b 100644 > --- a/arch/Kconfig > +++ b/arch/Kconfig > @@ -370,6 +370,18 @@ menuconfig GCC_PLUGINS > GCC plugins are loadable modules that provide extra features to the > compiler. They are useful for runtime instrumentation and static analysis. > > +config GCC_PLUGIN_CYC_COMPLEXITY > + bool "Compute the cyclomatic complexity of a function" > + depends on GCC_PLUGINS > + help > + The complexity M of a function's control flow graph is defined as: > + M = E - N + 2P > + where > + > + E = the number of edges > + N = the number of nodes > + P = the number of connected components (exit nodes). > + > config HAVE_CC_STACKPROTECTOR > bool > help > diff --git a/scripts/Makefile.gcc-plugins b/scripts/Makefile.gcc-plugins > index 7c85bf2..dd7b56d 100644 > --- a/scripts/Makefile.gcc-plugins > +++ b/scripts/Makefile.gcc-plugins > @@ -5,7 +5,11 @@ else > PLUGINCC := $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-plugin.sh "$(HOSTCC)" "$(HOSTCXX)" "$(CC)") > endif > ifneq ($(PLUGINCC),) > -export PLUGINCC GCC_PLUGINS_CFLAGS GCC_PLUGINS_AFLAGS > +ifdef CONFIG_GCC_PLUGIN_CYC_COMPLEXITY > +GCC_PLUGIN_CYC_COMPLEXITY_CFLAGS := -fplugin=$(objtree)/tools/gcc/cyc_complexity_plugin.so > +endif > +GCC_PLUGINS_CFLAGS := $(GCC_PLUGIN_CYC_COMPLEXITY_CFLAGS) > +export PLUGINCC GCC_PLUGINS_CFLAGS GCC_PLUGINS_AFLAGS GCC_PLUGIN_CYC_COMPLEXITY Do you need to export "GCC_PLUGIN_CYC_COMPLEXITY"? I do not see any reference to it. If we expect more and more plugins in the future, is it better to do like this? gcc-plugin-$(CONFIG_GCC_PLUGIN_CYC_COMPLEXITY) += cyc_complexity_plugin.so gcc-plugin-$(CONFIG_GCC_PLUGIN_SANCOV) += sancov_plugin.so gcc-plugin-$(CONFIG_GCC_PLUGIN_FOO) += foo_plugin.so GCC_PLUGINS_CFLAGS := $(addprefix -fplugin=$(objtree)/tools/gcc/, $(gcc-plugin-y)) -- Best Regards Masahiro Yamada -- To unsubscribe from this list: send the line "unsubscribe linux-kbuild" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
