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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [RFC PATCH] xen/build: Add cppcheck and cppcheck-html make rules
cppcheck can be used to check Xen code quality. To create a report do "make cppcheck" on a built tree adding any options you added during the process you used to build xen (like CROSS_COMPILE or XEN_TARGET_ARCH). This will generate an xml report xen-cppcheck.xml. To create a html report do "make cppcheck-html" in the same way and a full report to be seen in a browser will be generated in cppcheck-htmlreport/index.html. For better results it is recommended to build your own cppcheck from the latest sources that you can find at [1]. Development and result analysis has been done with cppcheck 2.7. The Makefile rule is searching for all C files which have been compiled (ie which have a generated .o file) and is running cppcheck on all of them using the current configuration of xen so only the code actually compiled is checked. A new tool is introduced to merge all cppcheck reports into one global report including all findings and removing duplicates. Some extra variables can be used to customize the report: - CPPCHECK can be used to give the full path to the cppcheck binary to use (default is to use the one from the standard path). - CPPCHECK_HTMLREPORT can be used to give the full path to cppcheck-htmlreport (default is to use the one from the standard path). This has been tested on several arm configurations (x86 should work but has not been tested). [1] https://cppcheck.sourceforge.io/ Signed-off-by: Bertrand Marquis <bertrand.marquis@xxxxxxx> Signed-off-by: Michal Orzel <michal.orzel@xxxxxxx> --- .gitignore | 3 ++ xen/Makefile | 75 +++++++++++++++++++++++++++- xen/arch/arm/include/asm/processor.h | 4 +- xen/include/xen/config.h | 4 ++ xen/include/xen/kconfig.h | 5 ++ xen/tools/merge_cppcheck_reports.py | 73 +++++++++++++++++++++++++++ 6 files changed, 161 insertions(+), 3 deletions(-) create mode 100755 xen/tools/merge_cppcheck_reports.py diff --git a/.gitignore b/.gitignore index d425be4bd9..0d2d60b8f1 100644 --- a/.gitignore +++ b/.gitignore @@ -7,6 +7,7 @@ *.o *.d *.d2 +*.c.cppcheck *.opic *.a *.so @@ -296,6 +297,7 @@ xen/.banner xen/.config xen/.config.old xen/.xen.elf32 +xen/xen-cppcheck.xml xen/System.map xen/arch/x86/boot/mkelf32 xen/arch/x86/boot/cmdline.S @@ -316,6 +318,7 @@ xen/arch/*/efi/runtime.c xen/arch/*/include/asm/asm-offsets.h xen/common/config_data.S xen/common/config.gz +xen/cppcheck-htmlreport xen/include/headers*.chk xen/include/compat/* xen/include/config/ diff --git a/xen/Makefile b/xen/Makefile index 18a4f7e101..0280d65051 100644 --- a/xen/Makefile +++ b/xen/Makefile @@ -336,7 +336,7 @@ export CFLAGS_UBSAN endif # need-config -main-targets := build install uninstall clean distclean MAP +main-targets := build install uninstall clean distclean MAP cppcheck cppcheck-html .PHONY: $(main-targets) ifneq ($(XEN_TARGET_ARCH),x86_32) $(main-targets): %: _% ; @@ -424,15 +424,17 @@ _clean: $(Q)$(MAKE) $(clean)=tools/kconfig find . \( -name "*.o" -o -name ".*.d" -o -name ".*.d2" \ -o -name ".*.o.tmp" -o -name "*~" -o -name "core" \ - -o -name '*.lex.c' -o -name '*.tab.[ch]' \ + -o -name '*.lex.c' -o -name '*.tab.[ch]' -o -name '*.c.cppcheck' \ -o -name "*.gcno" -o -name ".*.cmd" -o -name "lib.a" \) -exec rm -f {} \; rm -f include/asm $(TARGET) $(TARGET).gz $(TARGET).efi $(TARGET).efi.map $(TARGET)-syms $(TARGET)-syms.map rm -f asm-offsets.s arch/*/include/asm/asm-offsets.h rm -f .banner .allconfig.tmp include/xen/compile.h + rm -f xen-cppcheck.xml .PHONY: _distclean _distclean: clean rm -f tags TAGS cscope.files cscope.in.out cscope.out cscope.po.out GTAGS GPATH GRTAGS GSYMS .config + rm -rf $(CPPCHECK_HTMLREPORT_OUTDIR) $(TARGET).gz: $(TARGET) gzip -n -f -9 < $< > $@.new @@ -511,6 +513,75 @@ cloc: done; \ done | cloc --list-file=- +# What cppcheck command to use. +# To get proper results, it is recommended to build cppcheck manually from the +# latest source and use CPPCHECK to give the full path to the built version. +CPPCHECK ?= cppcheck + +# What cppcheck-htmlreport to use. +# If you give the full path to a self compiled cppcheck, this should be set +# to the full path to cppcheck-html in the htmlreport directory of cppcheck. +# On recent distribution, this is available in the standard path. +CPPCHECK_HTMLREPORT ?= cppcheck-htmlreport + +# By default we generate the report in cppcheck-htmlreport directory in the +# build directory. This can be changed by giving a directory in this variable. +CPPCHECK_HTMLREPORT_OUTDIR ?= cppcheck-htmlreport + +# Compile flags to pass to cppcheck: +# - include directories and defines Xen Makefile is passing (from CFLAGS) +# - include config.h as this is passed directly to the compiler. +# - define CPPCHECK as we use to disable or enable some specific part of the +# code to solve some cppcheck issues. +# - explicitely enable some cppcheck checks as we do not want to use "all" +# which includes unusedFunction which gives wrong positives as we check file +# per file. +# +# Compiler defines are in compiler-def.h which is included in config.h +# +CPPCHECKFLAGS := -DCPPCHECK --max-ctu-depth=10 \ + --enable=style,information,missingInclude \ + --include=$(BASEDIR)/include/xen/config.h \ + -I $(BASEDIR)/xsm/flask/include \ + -I $(BASEDIR)/include/xen/libfdt \ + $(filter -D% -I%,$(CFLAGS)) + +# We need to find all C files (as we are not checking assembly files) so +# we find all generated .o files which have a .c corresponding file. +CPPCHECKFILES := $(wildcard $(patsubst %.o,%.c, $(filter-out $(BASEDIR)/tools/%,$(shell find $(BASEDIR) -name "*.o")))) + +quiet_cmd_cppcheck_xml = CPPCHECK $(patsubst $(BASEDIR)/%,%,$<) +cmd_cppcheck_xml = $(CPPCHECK) -v -q --xml $(CPPCHECKFLAGS) \ + --output-file=$@ $< + +quiet_cmd_merge_cppcheck_reports = CPPCHECK-MERGE $@ +cmd_merge_cppcheck_reports = $(BASEDIR)/tools/merge_cppcheck_reports.py $^ $@ + +quiet_cmd_cppcheck_html = CPPCHECK-HTML $< +cmd_cppcheck_html = $(CPPCHECK_HTMLREPORT) --file=$< --source-dir=$(BASEDIR) \ + --report-dir=$(CPPCHECK_HTMLREPORT_OUTDIR) \ + --title=Xen + +PHONY += _cppcheck _cppcheck-html + +_cppcheck-html: xen-cppcheck.xml + $(call if_changed,cppcheck_html) + +_cppcheck: xen-cppcheck.xml + +xen-cppcheck.xml: $(patsubst %.c,%.c.cppcheck,$(CPPCHECKFILES)) +ifeq ($(CPPCHECKFILES),) + $(error Please build Xen before running cppcheck) +endif + $(call if_changed,merge_cppcheck_reports) + +%.c.cppcheck: %.c $(BASEDIR)/include/generated/autoconf.h $(BASEDIR)/include/generated/compiler-def.h + $(call if_changed,cppcheck_xml) + +# Put this in generated headers this way it is cleaned by include/Makefile +$(BASEDIR)/include/generated/compiler-def.h: + $(Q)$(CC) -dM -E -o $@ - < /dev/null + endif #config-build PHONY += FORCE diff --git a/xen/arch/arm/include/asm/processor.h b/xen/arch/arm/include/asm/processor.h index 852b5f3c24..0b4ba73760 100644 --- a/xen/arch/arm/include/asm/processor.h +++ b/xen/arch/arm/include/asm/processor.h @@ -219,9 +219,11 @@ SCTLR_Axx_ELx_A | SCTLR_Axx_ELx_C |\ SCTLR_Axx_ELx_WXN | SCTLR_Axx_ELx_EE) -#if (SCTLR_EL2_SET ^ SCTLR_EL2_CLEAR) != 0xffffffffffffffffUL +#ifndef CPPCHECK +#if (SCTLR_EL2_SET ^ SCTLR_EL2_CLEAR) != 0xffffffffffffffffULL #error "Inconsistent SCTLR_EL2 set/clear bits" #endif +#endif #endif diff --git a/xen/include/xen/config.h b/xen/include/xen/config.h index b76222ecf6..36e11e7133 100644 --- a/xen/include/xen/config.h +++ b/xen/include/xen/config.h @@ -7,6 +7,10 @@ #ifndef __XEN_CONFIG_H__ #define __XEN_CONFIG_H__ +#ifdef CPPCHECK +#include <generated/compiler-def.h> +#endif + #include <xen/kconfig.h> #ifndef __ASSEMBLY__ diff --git a/xen/include/xen/kconfig.h b/xen/include/xen/kconfig.h index 4d58c5bb3c..a717b0819c 100644 --- a/xen/include/xen/kconfig.h +++ b/xen/include/xen/kconfig.h @@ -8,6 +8,10 @@ * these only work with boolean option. */ +/* cppcheck is failing to parse the macro so use a dummy one */ +#ifdef CPPCHECK +#define IS_ENABLED(option) option +#else /* * Getting something that works in C and CPP for an arg that may or may * not be defined is tricky. Here, if we have "#define CONFIG_BOOGER 1" @@ -27,5 +31,6 @@ * otherwise. */ #define IS_ENABLED(option) config_enabled(option) +#endif #endif /* __XEN_KCONFIG_H */ diff --git a/xen/tools/merge_cppcheck_reports.py b/xen/tools/merge_cppcheck_reports.py new file mode 100755 index 0000000000..ef055f6925 --- /dev/null +++ b/xen/tools/merge_cppcheck_reports.py @@ -0,0 +1,73 @@ +#!/usr/bin/env python + +""" +This script acts as a tool to merge XML files created by cppcheck. +Usage: + merge_cppcheck_reports.py [FILES] [OUTPUT] + + FILES - list of XML files with extension .cppcheck + OUTPUT - file to store results (with .xml extension). + If not specified, the script will print results to stdout. +""" + +import sys +from xml.etree import ElementTree + +def elements_equal(el1, el2): + if type(el1) != type(el2): return False + + el1_location = str(el1.find('location').attrib) + el2_location = str(el2.find('location').attrib) + + if el1_location != el2_location: return False + + return True + +def remove_duplicates(xml_root_element): + elems_to_remove = [] + index = 0 + elems_list = list(xml_root_element.findall("errors")[0]) + for elem1 in elems_list: + index += 1 + for elem2 in elems_list[index:]: + if elements_equal(elem1, elem2) and elem2 not in elems_to_remove: + elems_to_remove.append(elem2) + continue + + for elem in elems_to_remove: + xml_root_element.findall("errors")[0].remove(elem) + +def merge(files): + result_xml_root = None + for xml_file in files: + xml_root = ElementTree.parse(xml_file).getroot() + for xml_error_elem in xml_root.iter('errors'): + if result_xml_root is None: + result_xml_root = xml_root + insert_point = result_xml_root.findall("errors")[0] + else: + insert_point.extend(xml_error_elem) + + return result_xml_root + +def run(): + files = [] + output = None + for i in sys.argv[1:]: + output = i if '.xml' in i else None + files.append(i) if '.cppcheck' in i else None + + result = merge(files) + + if result is None: + return + + remove_duplicates(result) + + if output is not None: + ElementTree.ElementTree(result).write(output) + else: + print(ElementTree.tostring(result).decode('utf-8')) + +if __name__ == '__main__': + run() -- 2.25.1
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