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cppcheck/addons/misra.py

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#!/usr/bin/env python3
#
# MISRA C 2012 checkers
# Partially reused for "MISRA C++ 2008" checking
#
# Example usage of this addon (scan a sourcefile main.cpp)
# cppcheck --dump main.cpp
# python misra.py --rule-texts=<path-to-rule-texts> main.cpp.dump
#
# Limitations: This addon is released as open source. Rule texts can't be freely
# distributed. https://www.misra.org.uk/forum/viewtopic.php?f=56&t=1189
#
# The MISRA standard documents may be obtained from https://www.misra.org.uk
#
# Total number of rules: 143
from __future__ import print_function
import cppcheckdata
import itertools
import json
import sys
import re
import os
import argparse
import codecs
import string
import copy
try:
from itertools import izip as zip
except ImportError:
pass
import misra_9
def grouped(iterable, n):
"""s -> (s0,s1,s2,...sn-1), (sn,sn+1,sn+2,...s2n-1), (s2n,s2n+1,s2n+2,...s3n-1), ..."""
return zip(*[iter(iterable)] * n)
INT_TYPES = ['bool', 'char', 'short', 'int', 'long', 'long long']
STDINT_TYPES = ['%s%d_t' % (n, v) for n, v in itertools.product(
['int', 'uint', 'int_least', 'uint_least', 'int_fast', 'uint_fast'],
[8, 16, 32, 64])]
typeBits = {
'CHAR': None,
'SHORT': None,
'INT': None,
'LONG': None,
'LONG_LONG': None,
'POINTER': None
}
def isUnsignedType(ty):
return ty == 'unsigned' or ty.startswith('uint')
def simpleMatch(token, pattern):
return cppcheckdata.simpleMatch(token, pattern)
def rawlink(rawtoken):
if rawtoken.str == '}':
indent = 0
while rawtoken:
if rawtoken.str == '}':
indent = indent + 1
elif rawtoken.str == '{':
indent = indent - 1
if indent == 0:
break
rawtoken = rawtoken.previous
else:
rawtoken = None
return rawtoken
# Identifiers described in Section 7 "Library" of C90 Standard
# Based on ISO/IEC9899:1990 Annex D -- Library summary and
# Annex E -- Implementation limits.
C90_STDLIB_IDENTIFIERS = {
# D.1 Errors
'errno.h': ['EDOM', 'ERANGE', 'errno'],
# D.2 Common definitions
'stddef.h': ['NULL', 'offsetof', 'ptrdiff_t', 'size_t', 'wchar_t'],
# D.3 Diagnostics
'assert.h': ['NDEBUG', 'assert'],
# D.4 Character handling
'ctype.h': [
'isalnum', 'isalpha', 'isblank', 'iscntrl', 'isdigit',
'isgraph', 'islower', 'isprint', 'ispunct', 'isspace',
'isupper', 'isxdigit', 'tolower', 'toupper',
],
# D.5 Localization
'locale.h': [
'LC_ALL', 'LC_COLLATE', 'LC_CTYPE', 'LC_MONETARY',
'LC_NUMERIC', 'LC_TIME', 'NULL', 'lconv',
'setlocale', 'localeconv',
],
# D.6 Mathematics
'math.h': [
'HUGE_VAL', 'acos', 'asin' , 'atan2', 'cos', 'sin', 'tan', 'cosh',
'sinh', 'tanh', 'exp', 'frexp', 'ldexp', 'log', 'loglO', 'modf',
'pow', 'sqrt', 'ceil', 'fabs', 'floor', 'fmod',
],
# D.7 Nonlocal jumps
'setjmp.h': ['jmp_buf', 'setjmp', 'longjmp'],
# D.8 Signal handling
'signal.h': [
'sig_atomic_t', 'SIG_DFL', 'SIG_ERR', 'SIG_IGN', 'SIGABRT', 'SIGFPE',
'SIGILL', 'SIGINT', 'SIGSEGV', 'SIGTERM', 'signal', 'raise',
],
# D.9 Variable arguments
'stdarg.h': ['va_list', 'va_start', 'va_arg', 'va_end'],
# D.10 Input/output
'stdio.h': [
'_IOFBF', '_IOLBF', '_IONBF', 'BUFSIZ', 'EOF', 'FILE', 'FILENAME_MAX',
'FOPEN_MAX', 'fpos_t', 'L_tmpnam', 'NULL', 'SEEK_CUR', 'SEEK_END',
'SEEK_SET', 'size_t', 'stderr', 'stdin', 'stdout', 'TMP_MAX',
'remove', 'rename', 'tmpfile', 'tmpnam', 'fclose', 'fflush', 'fopen',
'freopen', 'setbuf', 'setvbuf', 'fprintf', 'fscanf', 'printf',
'scanf', 'sprintf', 'sscanf', 'vfprintf', 'vprintf', 'vsprintf',
'fgetc', 'fgets', 'fputc', 'fputs', 'getc', 'getchar', 'gets', 'putc',
'putchar', 'puts', 'ungetc', 'fread', 'fwrite', 'fgetpos', 'fseek',
'fsetpos', 'rewind', 'clearerr', 'feof', 'ferror', 'perror',
],
# D.11 General utilities
'stdlib.h': [
'EXIT_FAILURE', 'EXIT_SUCCESS', 'MB_CUR_MAX', 'NULL', 'RAND_MAX',
'div_t', 'ldiv_t', 'wchar_t', 'atof', 'atoi', 'strtod', 'rand',
'srand', 'calloc', 'free', 'malloc', 'realloc', 'abort', 'atexit',
'exit', 'getenv', 'system', 'bsearch', 'qsort', 'abs', 'div', 'ldiv',
'mblen', 'mbtowc', 'wctomb', 'mbstowcs', 'wcstombs',
],
# D.12 String handling
'string.h': [
'NULL', 'size_t', 'memcpy', 'memmove', 'strcpy', 'strncpy', 'strcat',
'strncat', 'memcmp', 'strcmp', 'strcoll', 'strncmp', 'strxfrm',
'memchr', 'strchr', 'strcspn', 'strpbrk', 'strrchr', 'strspn',
'strstr', 'strtok', 'memset', 'strerror', 'strlen',
],
# D.13 Date and time
'time.h': [
'CLK_TCK', 'NULL', 'clock_t', 'time_t', 'size_t', 'tm', 'clock',
'difftime', 'mktime', 'time', 'asctime', 'ctime', 'gmtime',
'localtime', 'strftime',
],
# Annex E: Implementation limits
'limits.h': [
'CHAR_BIT', 'SCHAR_MIN', 'SCHAR_MAX', 'UCHAR_MAX', 'CHAR_MIN',
'CHAR_MAX', 'MB_LEN_MAX', 'SHRT_MIN', 'SHRT_MAX', 'USHRT_MAX',
'INT_MIN', 'INT_MAX', 'UINT_MAX', 'LONG_MIN', 'LONG_MAX', 'ULONG_MAX',
],
'float.h': [
'FLT_ROUNDS', 'FLT_RADIX', 'FLT_MANT_DIG', 'DBL_MANT_DIG',
'LDBL_MANT_DIG', 'DECIMAL_DIG', 'FLT_DIG', 'DBL_DIG', 'LDBL_DIG',
'DBL_MIN_EXP', 'LDBL_MIN_EXP', 'FLT_MIN_10_EXP', 'DBL_MIN_10_EXP',
'LDBL_MIN_10_EXP', 'FLT_MAX_EXP', 'DBL_MAX_EXP', 'LDBL_MAX_EXP',
'FLT_MAX_10_EXP', 'DBL_MAX_10_EXP', 'LDBL_MAX_10_EXP', 'FLT_MAX',
'DBL_MAX', 'LDBL_MAX', 'FLT_MIN', 'DBL_MIN', 'LDBL_MIN',
'FLT_EPSILON', 'DBL_EPSILON', 'LDBL_EPSILON'
],
}
# Identifiers described in Section 7 "Library" of C99 Standard
# Based on ISO/IEC 9899 WF14/N1256 Annex B -- Library summary
C99_STDLIB_IDENTIFIERS = {
# B.1 Diagnostics
'assert.h': C90_STDLIB_IDENTIFIERS['assert.h'],
# B.2 Complex
'complex.h': [
'complex', 'imaginary', 'I', '_Complex_I', '_Imaginary_I',
'CX_LIMITED_RANGE',
'cacos', 'cacosf', 'cacosl',
'casin', 'casinf', 'casinl',
'catan', 'catanf', 'catanl',
'ccos', 'ccosf', 'ccosl',
'csin', 'csinf', 'csinl',
'ctan', 'ctanf', 'ctanl',
'cacosh', 'cacoshf', 'cacoshl',
'casinh', 'casinhf', 'casinhl',
'catanh', 'catanhf', 'catanhl',
'ccosh', 'ccoshf', 'ccoshl',
'csinh', 'csinhf', 'csinhl',
'ctanh', 'ctanhf', 'ctanhl',
'cexp', 'cexpf', 'cexpl',
'clog', 'clogf', 'clogl',
'cabs', 'cabsf', 'cabsl',
'cpow', 'cpowf', 'cpowl',
'csqrt', 'csqrtf', 'csqrtl',
'carg', 'cargf', 'cargl',
'cimag', 'cimagf', 'cimagl',
'conj', 'conjf', 'conjl',
'cproj', 'cprojf', 'cprojl',
'creal', 'crealf', 'creall',
],
# B.3 Character handling
'ctype.h': C90_STDLIB_IDENTIFIERS['ctype.h'],
# B.4 Errors
'errno.h': C90_STDLIB_IDENTIFIERS['errno.h'] + ['EILSEQ'],
# B.5 Floating-point environment
'fenv.h': [
'fenv_t', 'FE_OVERFLOW', 'FE_TOWARDZERO',
'fexcept_t', 'FE_UNDERFLOW', 'FE_UPWARD',
'FE_DIVBYZERO', 'FE_ALL_EXCEPT', 'FE_DFL_ENV',
'FE_INEXACT', 'FE_DOWNWARD',
'FE_INVALID', 'FE_TONEAREST',
'FENV_ACCESS',
'feclearexcept', 'fegetexceptflag', 'fegetround',
'fesetround', 'fegetenv', 'feholdexcept',
'fesetenv', 'feupdateenv',
],
# B.6 Characteristics of floating types
'float.h': C90_STDLIB_IDENTIFIERS['float.h'] + ['FLT_EVAL_METHOD'],
# B.7 Format conversion of integer types
'inttypes.h': [
'imaxdiv_t', 'imaxabs', 'imaxdiv', 'strtoimax',
'strtoumax', 'wcstoimax', 'wcstoumax',
],
# B.8 Alternative spellings
'iso646.h': [
'and', 'and_eq', 'bitand', 'bitor', 'compl', 'not', 'not_eq',
'or', 'or_eq', 'xor', 'xor_eq',
],
# B.9 Size of integer types
'limits.h': C90_STDLIB_IDENTIFIERS['limits.h'] +
['LLONG_MIN', 'LLONG_MAX', 'ULLONG_MAX'],
# B.10 Localization
'locale.h': C90_STDLIB_IDENTIFIERS['locale.h'],
# B.11 Mathematics
'math.h': C90_STDLIB_IDENTIFIERS['math.h'] + [
'float_t', 'double_t', 'HUGE_VAL', 'HUGE_VALF', 'HUGE_VALL',
'INFINITY', 'NAN', 'FP_INFINITE', 'FP_NAN', 'FP_NORMAL',
'FP_SUBNORMAL', 'FP_ZERO', 'FP_FAST_FMA', 'FP_FAST_FMAF',
'FP_FAST_FMAL', 'FP_ILOGB0', 'FP_ILOGBNAN', 'MATH_ERRNO',
'MATH_ERREXCEPT', 'math_errhandling', 'FP_CONTRACT', 'fpclassify',
'isfinite', 'isinf', 'isnan', 'isnormal', 'signbit', 'acosf', 'acosl',
'asinf', 'asinl', 'atanf', 'atanl', 'atan2', 'atan2f', 'atan2l',
'cosf', 'cosl', 'sinf', 'sinl', 'tanf', 'tanl', 'acosh', 'acoshf',
'acoshl', 'asinh', 'asinhf', 'asinhl', 'atanh', 'atanhf', 'atanhl',
'cosh', 'coshf', 'coshl', 'sinh', 'sinhf', 'sinhl', 'tanh', 'tanhf',
'tanhl', 'expf', 'expl', 'exp2', 'exp2f', 'exp2l', 'expm1', 'expm1f',
'expm1l', 'frexpf', 'frexpl', 'ilogb', 'ilogbf', 'ilogbl', 'float',
'ldexpl', 'logf', 'logl', 'log10f', 'log10l', 'log1p', 'log1pf',
'log1pl', 'log2', 'log2f', 'log2l', 'logb', 'logbf', 'logbl', 'modff',
'modfl', 'scalbn', 'scalbnf', 'scalbnl', 'scalbln', 'scalblnf',
'scalblnl', 'hypotl', 'powf', 'powl', 'sqrtf', 'sqrtl', 'erf', 'erff',
'erfl', 'erfc', 'erfcf', 'erfcl', 'lgamma', 'lgammaf', 'lgammal',
'tgamma', 'tgammaf', 'tgammal', 'ceilf', 'ceill', 'floorf', 'floorl',
'nearbyint', 'nearbyintf', 'nearbyintl', 'rint', 'rintf', 'rintl',
'lrint', 'lrintf', 'lrintl', 'llrint', 'llrintf', 'llrintl', 'round',
'roundf', 'roundl', 'lround', 'lroundf', 'lroundl', 'llround',
'llroundf', 'llroundl', 'trunc', 'truncf', 'truncl', 'fmodf', 'fmodl',
'remainder', 'remainderf', 'remainderl', 'remquo', 'remquof',
'remquol', 'copysign', 'copysignf', 'copysignl', 'nan', 'nanf',
'nanl', 'nextafter', 'nextafterf', 'nextafterl', 'nexttoward',
'nexttowardf', 'nexttowardl', 'fdim', 'fdimf', 'fdiml', 'fmax',
'fmaxf', 'fmaxl', 'fmin', 'fminf', 'fminl', 'fmal', 'isgreater',
'isgreaterequal', 'isless', 'islessequal', 'islessgreater',
'isunordered',
],
# B.12 Nonlocal jumps
'setjmp.h': C90_STDLIB_IDENTIFIERS['setjmp.h'],
# B.13 Signal handling
'signal.h': C90_STDLIB_IDENTIFIERS['signal.h'],
# B.14 Variable arguments
'stdarg.h': C90_STDLIB_IDENTIFIERS['stdarg.h'] + ['va_copy'],
# B.15 Boolean type and values
'stdbool.h': ['bool', 'true', 'false', '__bool_true_false_are_defined'],
# B.16 Common definitions
'stddef.h': C90_STDLIB_IDENTIFIERS['stddef.h'],
# B.17 Integer types
'stdint.h': [
'intptr_t', 'uintptr_t', 'intmax_t', 'uintmax_t', 'INTN_MIN',
'INTN_MAX', 'UINTN_MAX', 'INT_LEASTN_MIN', 'INT_LEASTN_MAX',
'UINT_LEASTN_MAX', 'INT_FASTN_MIN', 'INT_FASTN_MAX', 'UINT_FASTN_MAX',
'INTPTR_MIN', 'INTPTR_MAX', 'UINTPTR_MAX', 'INTMAX_MIN', 'INTMAX_MAX',
'UINTMAX_MAX', 'PTRDIFF_MIN', 'PTRDIFF_MAX', 'SIG_ATOMIC_MIN',
'SIG_ATOMIC_MAX', 'SIZE_MAX', 'WCHAR_MIN', 'WCHAR_MAX', 'WINT_MIN',
'WINT_MAX', 'INTN_C', 'UINTN_C', 'INTMAX_C', 'UINTMAX_C',
] + STDINT_TYPES,
# B.18 Input/output
'stdio.h': C90_STDLIB_IDENTIFIERS['stdio.h'] + [
'mode', 'restrict', 'snprintf', 'vfscanf', 'vscanf',
'vsnprintf', 'vsscanf',
],
# B.19 General utilities
'stdlib.h': C90_STDLIB_IDENTIFIERS['stdlib.h'] + [
'_Exit', 'labs', 'llabs', 'lldiv', 'lldiv_t', 'strtof', 'strtol',
'strtold', 'strtoll', 'strtoul', 'strtoull'
],
# B.20 String handling
'string.h': C90_STDLIB_IDENTIFIERS['string.h'],
# B.21 Type-generic math
'tgmath.h': [
'acos', 'asin', 'atan', 'acosh', 'asinh', 'atanh', 'cos', 'sin', 'tan',
'cosh', 'sinh', 'tanh', 'exp', 'log', 'pow', 'sqrt', 'fabs', 'atan2',
'cbrt', 'ceil', 'copysign', 'erf', 'erfc', 'exp2', 'expm1', 'fdim',
'floor', 'fma', 'fmax', 'fmin', 'fmod', 'frexp', 'hypot', 'ilogb',
'ldexp', 'lgamma', 'llrint', 'llround', 'log10', 'log1p', 'log2',
'logb', 'lrint', 'lround', 'nearbyint', 'nextafter', 'nexttoward',
'remainder', 'remquo', 'rint', 'round', 'scalbn', 'scalbln', 'tgamma',
'trunc', 'carg', 'cimag', 'conj', 'cproj', 'creal',
],
# B.22 Date and time
'time.h': C90_STDLIB_IDENTIFIERS['time.h'] + ['CLOCKS_PER_SEC'],
# B.23 Extended multibyte/wide character utilities
'wchar.h': [
'wchar_t', 'size_t', 'mbstate_t', 'wint_t', 'tm', 'NULL', 'WCHAR_MAX',
'WCHAR_MIN', 'WEOF', 'fwprintf', 'fwscanf', 'swprintf', 'swscanf',
'vfwprintf', 'vfwscanf', 'vswprintf', 'vswscanf', 'vwprintf',
'vwscanf', 'wprintf', 'wscanf', 'fgetwc', 'fgetws', 'fputwc', 'fputws',
'fwide', 'getwc', 'getwchar', 'putwc', 'putwchar', 'ungetwc', 'wcstod',
'wcstof', 'double', 'int', 'long', 'long', 'long', 'wcscpy', 'wcsncpy',
'wmemcpy', 'wmemmove', 'wcscat', 'wcsncat', 'wcscmp', 'wcscoll',
'wcsncmp', 'wcsxfrm', 'wmemcmp', 'wcschr', 'wcscspn', 'wcspbrk',
'wcsrchr', 'wcsspn', 'wcsstr', 'wcstok', 'wmemchr', 'wcslen',
'wmemset', 'wcsftime', 'btowc', 'wctob', 'mbsinit', 'mbrlen',
'mbrtowc', 'wcrtomb', 'mbsrtowcs', 'wcsrtombs',
],
}
def isStdLibId(id_, standard='c99'):
id_lists = []
if standard == 'c89':
id_lists = C90_STDLIB_IDENTIFIERS.values()
elif standard in ('c99', 'c11'):
id_lists = C99_STDLIB_IDENTIFIERS.values()
for l in id_lists:
if id_ in l:
return True
return False
# Reserved keywords defined in ISO/IEC9899:1990 -- ch 6.1.1
C90_KEYWORDS = {
'auto', 'break', 'case', 'char', 'const', 'continue', 'default', 'do',
'double', 'else', 'enum', 'extern', 'float', 'for', 'goto', 'if',
'int', 'long', 'register', 'return', 'short', 'signed',
'sizeof', 'static', 'struct', 'switch', 'typedef', 'union', 'unsigned',
'void', 'volatile', 'while'
}
# Reserved keywords defined in ISO/IEC 9899 WF14/N1256 -- ch. 6.4.1
C99_ADDED_KEYWORDS = {
'inline', 'restrict', '_Bool', '_Complex', '_Imaginary',
'bool', 'complex', 'imaginary'
}
C11_ADDED_KEYWORDS = {
'_Alignas', '_Alignof', '_Atomic', '_Generic', '_Noreturn',
'_Statis_assert', '_Thread_local' ,
'alignas', 'alignof', 'noreturn', 'static_assert'
}
def isKeyword(keyword, standard='c99'):
kw_set = {}
if standard == 'c89':
kw_set = C90_KEYWORDS
elif standard == 'c99':
kw_set = copy.copy(C90_KEYWORDS)
kw_set.update(C99_ADDED_KEYWORDS)
else:
kw_set = copy.copy(C90_KEYWORDS)
kw_set.update(C99_ADDED_KEYWORDS)
kw_set.update(C11_ADDED_KEYWORDS)
return keyword in kw_set
def is_source_file(file):
return file.endswith('.c')
def is_header(file):
return file.endswith('.h')
def is_errno_setting_function(function_name):
return function_name and \
function_name in ('ftell', 'fgetpos', 'fsetpos', 'fgetwc', 'fputwc'
'strtoimax', 'strtoumax', 'strtol', 'strtoul',
'strtoll', 'strtoull', 'strtof', 'strtod', 'strtold'
'wcstoimax', 'wcstoumax', 'wcstol', 'wcstoul',
'wcstoll', 'wcstoull', 'wcstof', 'wcstod', 'wcstold'
'wcrtomb', 'wcsrtombs', 'mbrtowc')
def get_type_conversion_to_from(token):
def get_vartok(expr):
while expr:
if isCast(expr):
if expr.astOperand2 is None:
expr = expr.astOperand1
else:
expr = expr.astOperand2
elif expr.str in ('.', '::'):
expr = expr.astOperand2
elif expr.str == '[':
expr = expr.astOperand1
else:
break
return expr if (expr and expr.variable) else None
if isCast(token):
vartok = get_vartok(token)
if vartok:
return (token.next, vartok.variable.typeStartToken)
elif token.str == '=':
lhs = get_vartok(token.astOperand1)
rhs = get_vartok(token.astOperand2)
if lhs and rhs:
return (lhs.variable.typeStartToken, rhs.variable.typeStartToken)
return None
def is_composite_expr(expr, composite_operator=False):
"""MISRA C 2012, section 8.10.3"""
if expr is None:
return False
if not composite_operator:
if (expr.str in ('+', '-', '*', '/', '%', '&', '|', '^', '>>', "<<", "?", ":", '~')):
return is_composite_expr(expr.astOperand1,True) or is_composite_expr(expr.astOperand2, True)
if expr.str == '?' and simpleMatch(expr.astOperand2, ':'):
colon = expr.astOperand2
return is_composite_expr(colon.astOperand1,True) or is_composite_expr(colon.astOperand2, True)
return False
# non constant expression?
if expr.isNumber:
return False
if expr.astOperand1 or expr.astOperand2:
return is_composite_expr(expr.astOperand1,True) or is_composite_expr(expr.astOperand2, True)
return True
def getEssentialTypeCategory(expr):
if not expr:
return None
if expr.str == ',':
return getEssentialTypeCategory(expr.astOperand2)
if expr.str in ('<', '<=', '==', '!=', '>=', '>', '&&', '||', '!'):
return 'bool'
if expr.str in ('<<', '>>'):
# TODO this is incomplete
return getEssentialTypeCategory(expr.astOperand1)
if len(expr.str) == 1 and expr.str in '+-*/%&|^':
# TODO this is incomplete
e1 = getEssentialTypeCategory(expr.astOperand1)
e2 = getEssentialTypeCategory(expr.astOperand2)
# print('{0}: {1} {2}'.format(expr.str, e1, e2))
if e1 and e2 and e1 == e2:
return e1
if expr.valueType:
return expr.valueType.sign
if expr.valueType and expr.valueType.typeScope and expr.valueType.typeScope.className:
return "enum<" + expr.valueType.typeScope.className + ">"
# Unwrap membership, dereferences and array indexing
vartok = expr
while True:
if simpleMatch(vartok, '[') or (vartok and vartok.str == '*' and vartok.astOperand2 is None):
vartok = vartok.astOperand1
elif simpleMatch(vartok, '.'):
vartok = vartok.astOperand2
else:
break
if vartok and vartok.variable:
typeToken = vartok.variable.typeStartToken
while typeToken and typeToken.isName:
if typeToken.str == 'char' and not typeToken.isSigned and not typeToken.isUnsigned:
return 'char'
if typeToken.valueType:
if typeToken.valueType.type == 'bool':
return typeToken.valueType.type
if typeToken.valueType.type in ('float', 'double', 'long double'):
return "float"
if typeToken.valueType.sign:
return typeToken.valueType.sign
typeToken = typeToken.next
# See Appendix D, section D.6, Character constants
if expr.str[0] == "'" and expr.str[-1] == "'":
if len(expr.str) == 3 or (len(expr.str) == 4 and expr.str[1] == '\\'):
return 'char'
return expr.valueType.sign
if (expr.isCast and expr.str == "("):
castTok = expr.next
while castTok.isName or castTok.str == "*":
if castTok.str == 'char' and not castTok.isSigned and not castTok.isUnsigned:
return 'char'
castTok = castTok.next
if expr.valueType:
return expr.valueType.sign
return None
def getEssentialCategorylist(operand1, operand2):
if not operand1 or not operand2:
return None, None
if (operand1.str in ('++', '--') or
operand2.str in ('++', '--')):
return None, None
if ((operand1.valueType and operand1.valueType.pointer) or
(operand2.valueType and operand2.valueType.pointer)):
return None, None
e1 = getEssentialTypeCategory(operand1)
e2 = getEssentialTypeCategory(operand2)
return e1, e2
def get_essential_type_from_value(value, is_signed):
if value is None:
return None
for t in ('char', 'short', 'int', 'long', 'long long'):
bits = bitsOfEssentialType(t)
if bits >= 64:
continue
if is_signed:
range_min = -(1 << (bits - 1))
range_max = (1 << (bits - 1)) - 1
else:
range_min = 0
range_max = (1 << bits) - 1
sign = 'signed' if is_signed else 'unsigned'
if is_signed and value < 0 and value >= range_min:
return '%s %s' % (sign, t)
if value >= 0 and value <= range_max:
return '%s %s' % (sign, t)
return None
def getEssentialType(expr):
if not expr:
return None
# See Appendix D, section D.6, Character constants
if expr.str[0] == "'" and expr.str[-1] == "'":
if len(expr.str) == 3 or (len(expr.str) == 4 and expr.str[1] == '\\'):
return 'char'
return '%s %s' % (expr.valueType.sign, expr.valueType.type)
if expr.variable or isCast(expr):
typeToken = expr.variable.typeStartToken if expr.variable else expr.next
while typeToken and typeToken.isName:
if typeToken.str == 'char' and not typeToken.isSigned and not typeToken.isUnsigned:
return 'char'
typeToken = typeToken.next
if expr.valueType:
if expr.valueType.type == 'bool':
return 'bool'
if expr.valueType.isFloat():
return expr.valueType.type
if expr.valueType.isIntegral():
if (expr.valueType.sign is None) and expr.valueType.type == 'char':
return 'char'
return '%s %s' % (expr.valueType.sign, expr.valueType.type)
elif expr.isNumber:
# Appendix D, D.6 The essential type of literal constants
# Integer constants
if expr.valueType.type == 'bool':
return 'bool'
if expr.valueType.isFloat():
return expr.valueType.type
if expr.valueType.isIntegral():
if expr.valueType.type != 'int':
return '%s %s' % (expr.valueType.sign, expr.valueType.type)
return get_essential_type_from_value(expr.getKnownIntValue(), expr.valueType.sign == 'signed')
elif expr.str in ('<', '<=', '>=', '>', '==', '!=', '&&', '||', '!'):
return 'bool'
elif expr.astOperand1 and expr.astOperand2 and expr.str in (
'+', '-', '*', '/', '%', '&', '|', '^', '>>', "<<", "?", ":"):
if expr.astOperand1.valueType and expr.astOperand1.valueType.pointer > 0:
return None
if expr.astOperand2.valueType and expr.astOperand2.valueType.pointer > 0:
return None
e1 = getEssentialType(expr.astOperand1)
e2 = getEssentialType(expr.astOperand2)
if e1 is None or e2 is None:
return None
if is_constant_integer_expression(expr):
sign1 = e1.split(' ')[0]
sign2 = e2.split(' ')[0]
if sign1 == sign2 and sign1 in ('signed', 'unsigned'):
e = get_essential_type_from_value(expr.getKnownIntValue(), sign1 == 'signed')
if e:
return e
if bitsOfEssentialType(e2) >= bitsOfEssentialType(e1):
return e2
else:
return e1
elif expr.str == "~":
e1 = getEssentialType(expr.astOperand1)
return e1
return None
def bitsOfEssentialType(ty):
if ty is None:
return 0
last_type = ty.split(' ')[-1]
if last_type == 'Boolean':
return 1
if last_type == 'char':
return typeBits['CHAR']
if last_type == 'short':
return typeBits['SHORT']
if last_type == 'int':
return typeBits['INT']
if ty.endswith('long long'):
return typeBits['LONG_LONG']
if last_type == 'long':
return typeBits['LONG']
for sty in STDINT_TYPES:
if ty == sty:
return int(''.join(filter(str.isdigit, sty)))
return 0
def get_function_pointer_type(tok):
ret = ''
par = 0
while tok and (tok.isName or tok.str == '*'):
ret += ' ' + tok.str
tok = tok.next
if tok is None or tok.str != '(':
return None
tok = tok.link
if not simpleMatch(tok, ') ('):
return None
ret += '('
tok = tok.next.next
while tok and (tok.str not in '()'):
if tok.varId is None:
ret += ' ' + tok.str
tok = tok.next
if (tok is None) or tok.str != ')':
return None
return ret[1:] + ')'
def isCast(expr):
if not expr or expr.str != '(' or not expr.astOperand1 or expr.astOperand2:
return False
if simpleMatch(expr, '( )'):
return False
return True
def is_constant_integer_expression(expr):
if expr is None:
return False
if expr.isInt:
return True
if not expr.isArithmeticalOp:
return False
if expr.astOperand1 and not is_constant_integer_expression(expr.astOperand1):
return False
if expr.astOperand2 and not is_constant_integer_expression(expr.astOperand2):
return False
return True
def isFunctionCall(expr, std='c99'):
if not expr:
return False
if expr.str != '(' or not expr.astOperand1:
return False
if expr.astOperand1 != expr.previous:
return False
if isKeyword(expr.astOperand1.str, std):
return False
return True
def hasExternalLinkage(var):
return var.isGlobal and not var.isStatic
def countSideEffects(expr):
if not expr or expr.str in (',', ';'):
return 0
ret = 0
if expr.str in ('++', '--', '='):
ret = 1
return ret + countSideEffects(expr.astOperand1) + countSideEffects(expr.astOperand2)
def getForLoopExpressions(forToken):
if not forToken or forToken.str != 'for':
return None
lpar = forToken.next
if not lpar or lpar.str != '(':
return None
if not lpar.astOperand2 or lpar.astOperand2.str != ';':
return None
if not lpar.astOperand2.astOperand2 or lpar.astOperand2.astOperand2.str != ';':
return None
return [lpar.astOperand2.astOperand1,
lpar.astOperand2.astOperand2.astOperand1,
lpar.astOperand2.astOperand2.astOperand2]
def get_function_scope(cfg, func):
if func:
for scope in cfg.scopes:
if scope.function == func:
return scope
return None
def is_variable_changed(start_token, end_token, var):
"""Check if variable is updated between body_start and body_end"""
tok = start_token
while tok != end_token:
if tok.isAssignmentOp:
vartok = tok.astOperand1
while vartok.astOperand1:
vartok = vartok.astOperand1
if vartok and vartok.variable == var:
return True
tok = tok.next
return False
def getForLoopCounterVariables(forToken, cfg):
""" Return a set of Variable objects defined in ``for`` statement and
satisfy requirements to loop counter term from section 8.14 of MISRA
document.
"""
if not forToken or forToken.str != 'for':
return None
tn = forToken.next
if not tn or tn.str != '(':
return None
vars_defined = set()
vars_initialized = set()
vars_exit = set()
vars_modified = set()
cur_clause = 1
te = tn.link
while tn and tn != te:
if tn.variable:
if cur_clause == 1 and tn.variable.nameToken == tn:
vars_defined.add(tn.variable)
elif cur_clause == 2:
vars_exit.add(tn.variable)
elif cur_clause == 3:
if tn.next and countSideEffectsRecursive(tn.next) > 0:
vars_modified.add(tn.variable)
elif tn.previous and tn.previous.str in ('++', '--'):
tn_ast = tn.astParent
if tn_ast and tn_ast == tn.previous:
vars_modified.add(tn.variable)
elif tn_ast and tn_ast.str == '.' and tn_ast.astOperand2 and tn_ast.astOperand2.variable:
vars_modified.add(tn_ast.astOperand2.variable)
if cur_clause == 1 and tn.isAssignmentOp:
var_token = tn.astOperand1
while var_token and var_token.str == '.':
var_token = var_token.astOperand2
if var_token and var_token.variable:
vars_initialized.add(var_token.variable)
if cur_clause == 1 and tn.isName and tn.next.str == '(':
function_args_in_init = getArguments(tn.next)
function_scope = get_function_scope(cfg, tn.function)
for arg_nr in range(len(function_args_in_init)):
init_arg = function_args_in_init[arg_nr]
if init_arg is None or not init_arg.isUnaryOp('&'):
continue
var_token = init_arg.astOperand1
while var_token and var_token.str == '.':
var_token = var_token.astOperand2
if var_token is None or var_token.variable is None:
continue
changed = False
if function_scope is None:
changed = True
elif tn.function is None:
changed = True
else:
function_body_start = function_scope.bodyStart
function_body_end = function_scope.bodyEnd
args = tn.function.argument[arg_nr + 1]
if function_scope is None or is_variable_changed(function_body_start, function_body_end, args):
changed = True
if changed:
vars_initialized.add(var_token.variable)
if tn.str == ';':
cur_clause += 1
tn = tn.next
return vars_defined | vars_initialized, vars_exit & vars_modified
def findCounterTokens(cond):
if not cond:
return []
if cond.str in ['&&', '||']:
c = findCounterTokens(cond.astOperand1)
c.extend(findCounterTokens(cond.astOperand2))
return c
ret = []
if ((cond.isArithmeticalOp and cond.astOperand1 and cond.astOperand2) or
(cond.isComparisonOp and cond.astOperand1 and cond.astOperand2)):
if cond.astOperand1.isName:
ret.append(cond.astOperand1)
if cond.astOperand2.isName:
ret.append(cond.astOperand2)
if cond.astOperand1.isOp:
ret.extend(findCounterTokens(cond.astOperand1))
if cond.astOperand2.isOp:
ret.extend(findCounterTokens(cond.astOperand2))
return ret
def isFloatCounterInWhileLoop(whileToken):
if not simpleMatch(whileToken, 'while ('):
return False
lpar = whileToken.next
rpar = lpar.link
counterTokens = findCounterTokens(lpar.astOperand2)
whileBodyStart = None
if simpleMatch(rpar, ') {'):
whileBodyStart = rpar.next
elif simpleMatch(whileToken.previous, '} while') and simpleMatch(whileToken.previous.link.previous, 'do {'):
whileBodyStart = whileToken.previous.link
else:
return False
token = whileBodyStart
while token != whileBodyStart.link:
token = token.next
for counterToken in counterTokens:
if not counterToken.valueType or not counterToken.valueType.isFloat():
continue
if token.isAssignmentOp and token.astOperand1.str == counterToken.str:
return True
if token.str == counterToken.str and token.astParent and token.astParent.str in ('++', '--'):
return True
return False
def countSideEffectsRecursive(expr):
if not expr or expr.str == ';':
return 0
if expr.str == '=' and expr.astOperand1 and expr.astOperand1.str == '[':
prev = expr.astOperand1.previous
if prev and (prev.str == '{' or prev.str == '{'):
return countSideEffectsRecursive(expr.astOperand2)
if expr.str == '=' and expr.astOperand1 and expr.astOperand1.str == '.':
e = expr.astOperand1
while e and e.str == '.' and e.astOperand2:
e = e.astOperand1
if e and e.str == '.':
return 0
if expr.isAssignmentOp or expr.str in {'++', '--'}:
return 1
# Todo: Check function calls
return countSideEffectsRecursive(expr.astOperand1) + countSideEffectsRecursive(expr.astOperand2)
def isBoolExpression(expr):
if not expr:
return False
if expr.valueType and (expr.valueType.type == 'bool' or expr.valueType.bits == 1):
return True
return expr.str in ['!', '==', '!=', '<', '<=', '>', '>=', '&&', '||', '0', '1', 'true', 'false']
def isEnumConstant(expr):
if not expr or not expr.values:
return False
values = expr.values
return len(values) == 1 and values[0].valueKind == 'known'
def isConstantExpression(expr):
if expr.isNumber:
return True
if expr.isName and not isEnumConstant(expr):
return False
if simpleMatch(expr.previous, 'sizeof ('):
return True
if expr.astOperand1 and not isConstantExpression(expr.astOperand1):
return False
if expr.astOperand2 and not isConstantExpression(expr.astOperand2):
return False
return True
def isUnknownConstantExpression(expr):
if expr.isName and not isEnumConstant(expr) and expr.variable is None:
return True
if expr.astOperand1 and isUnknownConstantExpression(expr.astOperand1):
return True
if expr.astOperand2 and isUnknownConstantExpression(expr.astOperand2):
return True
return False
def isUnsignedInt(expr):
return expr and expr.valueType and expr.valueType.type in ('short', 'int') and expr.valueType.sign == 'unsigned'
def getPrecedence(expr):
if not expr:
return 16
if not expr.astOperand1 or not expr.astOperand2:
return 16
if expr.str in ('*', '/', '%'):
return 12
if expr.str in ('+', '-'):
return 11
if expr.str in ('<<', '>>'):
return 10
if expr.str in ('<', '>', '<=', '>='):
return 9
if expr.str in ('==', '!='):
return 8
if expr.str == '&':
return 7
if expr.str == '^':
return 6
if expr.str == '|':
return 5
if expr.str == '&&':
return 4
if expr.str == '||':
return 3
if expr.str in ('?', ':'):
return 2
if expr.isAssignmentOp:
return 1
if expr.str == ',':
return 0
return -1
def findRawLink(token):
tok1 = None
tok2 = None
forward = False
if token.str in '{([':
tok1 = token.str
tok2 = '})]'['{(['.find(token.str)]
forward = True
elif token.str in '})]':
tok1 = token.str
tok2 = '{(['['})]'.find(token.str)]
forward = False
else:
return None
# try to find link
indent = 0
while token:
if token.str == tok1:
indent = indent + 1
elif token.str == tok2:
if indent <= 1:
return token
indent = indent - 1
if forward is True:
token = token.next
else:
token = token.previous
# raw link not found
return None
def numberOfParentheses(tok1, tok2):
while tok1 and tok1 != tok2:
if tok1.str == '(' or tok1.str == ')':
return False
tok1 = tok1.next
return tok1 == tok2
def findGotoLabel(gotoToken):
label = gotoToken.next.str
tok = gotoToken.next.next
while tok:
if tok.str == '}' and tok.scope.type == 'Function':
break
if tok.str == label and tok.next.str == ':':
return tok
tok = tok.next
return None
def findInclude(directives, header):
for directive in directives:
if directive.str == '#include ' + header:
return directive
return None
# Get function arguments
def getArgumentsRecursive(tok, arguments):
if tok is None:
return
if tok.str == ',':
getArgumentsRecursive(tok.astOperand1, arguments)
getArgumentsRecursive(tok.astOperand2, arguments)
else:
arguments.append(tok)
def getArguments(ftok):
arguments = []
getArgumentsRecursive(ftok.astOperand2, arguments)
return arguments
def isalnum(c):
return c in string.digits or c in string.ascii_letters
def isHexEscapeSequence(symbols):
"""Checks that given symbols are valid hex escape sequence.
hexadecimal-escape-sequence:
\\x hexadecimal-digit
hexadecimal-escape-sequence hexadecimal-digit
Reference: n1570 6.4.4.4"""
if len(symbols) < 3 or symbols[:2] != '\\x':
return False
return all([s in string.hexdigits for s in symbols[2:]])
def isOctalEscapeSequence(symbols):
r"""Checks that given symbols are valid octal escape sequence:
octal-escape-sequence:
\ octal-digit
\ octal-digit octal-digit
\ octal-digit octal-digit octal-digit
Reference: n1570 6.4.4.4"""
if len(symbols) not in range(2, 5) or symbols[0] != '\\':
return False
return all([s in string.octdigits for s in symbols[1:]])
def isSimpleEscapeSequence(symbols):
"""Checks that given symbols are simple escape sequence.
Reference: n1570 6.4.4.4"""
if len(symbols) != 2 or symbols[0] != '\\':
return False
return symbols[1] in ("'", '"', '?', '\\', 'a', 'b', 'f', 'n', 'r', 't', 'v')
def isTernaryOperator(token):
if not token:
return False
if not token.astOperand2:
return False
return token.str == '?' and token.astOperand2.str == ':'
def getTernaryOperandsRecursive(token):
"""Returns list of ternary operands including nested ones."""
if not isTernaryOperator(token):
return []
result = []
result += getTernaryOperandsRecursive(token.astOperand2.astOperand1)
if token.astOperand2.astOperand1 and not isTernaryOperator(token.astOperand2.astOperand1):
result += [token.astOperand2.astOperand1]
result += getTernaryOperandsRecursive(token.astOperand2.astOperand2)
if token.astOperand2.astOperand2 and not isTernaryOperator(token.astOperand2.astOperand2):
result += [token.astOperand2.astOperand2]
return result
def hasNumericEscapeSequence(symbols):
"""Check that given string contains octal or hexadecimal escape sequences."""
if '\\' not in symbols:
return False
for c, cn in grouped(symbols, 2):
if c == '\\' and cn in ('x' + string.octdigits):
return True
return False
def isNoReturnScope(tok):
if tok is None or tok.str != '}':
return False
if tok.previous is None or tok.previous.str != ';':
return False
if simpleMatch(tok.previous.previous, 'break ;'):
return True
prev = tok.previous.previous
while prev and prev.str not in ';{}':
if prev.str in '])':
prev = prev.link
prev = prev.previous
if prev and prev.next.str in ['throw', 'return']:
return True
return False
# Return the token which the value is assigned to
def getAssignedVariableToken(vartok):
if not vartok:
return None
parent = vartok.astParent
while parent and parent.isArithmeticalOp:
parent = parent.astParent
if parent and parent.isAssignmentOp:
return parent.astOperand1
return None
# If the value is used as a return value, return the function definition
def getFunctionUsingReturnValue(valueToken):
if not valueToken:
return None
if not valueToken.astParent:
return None
operator = valueToken.astParent
if operator.str == 'return':
return operator.scope.function
if operator.isArithmeticalOp:
return getFunctionUsingReturnValue(operator)
return None
# Return true if the token follows a specific sequence of token str values
def tokenFollowsSequence(token, sequence):
if not token:
return False
for i in reversed(sequence):
prev = token.previous
if not prev:
return False
if prev.str != i:
return False
token = prev
return True
class Define:
def __init__(self, directive):
self.name = ''
self.args = []
self.expansionList = ''
res = re.match(r'#define ([A-Za-z0-9_]+)\(([A-Za-z0-9_, ]+)\)[ ]+(.*)', directive.str)
if res:
self.name = res.group(1)
self.args = res.group(2).strip().split(',')
self.expansionList = res.group(3)
else:
res = re.match(r'#define ([A-Za-z0-9_]+)[ ]+(.*)', directive.str)
if res:
self.name = res.group(1)
self.expansionList = res.group(2)
def __repr__(self):
attrs = ["name", "args", "expansionList"]
return "{}({})".format(
"Define",
", ".join(("{}={}".format(a, repr(getattr(self, a))) for a in attrs))
)
def getAddonRules():
"""Returns dict of MISRA rules handled by this addon."""
addon_rules = []
compiled = re.compile(r'.*def[ ]+misra_([0-9]+)_([0-9]+)[(].*')
with open(__file__) as f:
for line in f:
res = compiled.match(line)
if res is None:
continue
addon_rules.append(res.group(1) + '.' + res.group(2))
return addon_rules
def getCppcheckRules():
"""Returns list of rules handled by cppcheck."""
return ['1.3', # <most "error">
'2.1', # alwaysFalse, duplicateBreak
'2.2', # alwaysTrue, redundantCondition, redundantAssignment, redundantAssignInSwitch, unreadVariable
'2.6', # unusedLabel
'5.3', # shadowVariable
'8.3', # funcArgNamesDifferent
'8.13', # constPointer
'9.1', # uninitvar
'14.3', # alwaysTrue, alwaysFalse, compareValueOutOfTypeRangeError
'13.2', # unknownEvaluationOrder
'13.6', # sizeofCalculation
'17.4', # missingReturn
'17.5', # argumentSize
'18.1', # pointerOutOfBounds
'18.2', # comparePointers
'18.3', # comparePointers
'18.6', # danglingLifetime
'19.1', # overlappingWriteUnion, overlappingWriteFunction
'20.6', # preprocessorErrorDirective
'21.13', # invalidFunctionArg
'21.17', # bufferAccessOutOfBounds
'21.18', # bufferAccessOutOfBounds
'22.1', # memleak, resourceLeak, memleakOnRealloc, leakReturnValNotUsed, leakNoVarFunctionCall
'22.2', # autovarInvalidDeallocation
'22.3', # incompatibleFileOpen
'22.4', # writeReadOnlyFile
'22.6' # useClosedFile
]
def generateTable():
# print table
numberOfRules = {}
numberOfRules[1] = 3
numberOfRules[2] = 7
numberOfRules[3] = 2
numberOfRules[4] = 2
numberOfRules[5] = 9
numberOfRules[6] = 2
numberOfRules[7] = 4
numberOfRules[8] = 14
numberOfRules[9] = 5
numberOfRules[10] = 8
numberOfRules[11] = 9
numberOfRules[12] = 4
numberOfRules[13] = 6
numberOfRules[14] = 4
numberOfRules[15] = 7
numberOfRules[16] = 7
numberOfRules[17] = 8
numberOfRules[18] = 8
numberOfRules[19] = 2
numberOfRules[20] = 14
numberOfRules[21] = 21
numberOfRules[22] = 10
# Rules that can be checked with compilers:
# compiler = ['1.1', '1.2']
addon = getAddonRules()
cppcheck = getCppcheckRules()
for i1 in range(1, 23):
for i2 in range(1, numberOfRules[i1] + 1):
num = str(i1) + '.' + str(i2)
s = ''
if num in addon:
s = 'X (Addon)'
elif num in cppcheck:
s = 'X (Cppcheck)'
num = num + ' '
print(num[:8] + s)
def remove_file_prefix(file_path, prefix):
"""
Remove a file path prefix from a give path. leftover
directory separators at the beginning of a file
after the removal are also stripped.
Example:
'/remove/this/path/file.c'
with a prefix of:
'/remove/this/path'
becomes:
file.c
"""
result = None
if file_path.startswith(prefix):
result = file_path[len(prefix):]
# Remove any leftover directory separators at the
# beginning
result = result.lstrip('\\/')
else:
result = file_path
return result
class Rule(object):
"""Class to keep rule text and metadata"""
MISRA_SEVERITY_LEVELS = ['Required', 'Mandatory', 'Advisory']
def __init__(self, num1, num2):
self.num1 = num1
self.num2 = num2
self.text = ''
self.misra_severity = ''
@property
def num(self):
return self.num1 * 100 + self.num2
@property
def misra_severity(self):
return self._misra_severity
@misra_severity.setter
def misra_severity(self, val):
if val in self.MISRA_SEVERITY_LEVELS:
self._misra_severity = val
else:
self._misra_severity = ''
@property
def cppcheck_severity(self):
return 'style'
def __repr__(self):
return "%d.%d (%s)" % (self.num1, self.num2, self.misra_severity)
class MisraSettings(object):
"""Hold settings for misra.py script."""
__slots__ = ["verify", "quiet", "show_summary"]
def __init__(self, args):
"""
:param args: Arguments given by argparse.
"""
self.verify = False
self.quiet = False
self.show_summary = True
if args.verify:
self.verify = True
if args.cli:
self.quiet = True
self.show_summary = False
if args.quiet:
self.quiet = True
if args.no_summary:
self.show_summary = False
def __repr__(self):
attrs = ["verify", "quiet", "show_summary", "verify"]
return "{}({})".format(
"MisraSettings",
", ".join(("{}={}".format(a, repr(getattr(self, a))) for a in attrs))
)
class MisraChecker:
def __init__(self, settings, stdversion="c89"):
"""
:param settings: misra.py script settings.
"""
self.settings = settings
# Test validation rules lists
self.verify_expected = list()
self.verify_actual = list()
# List of formatted violation messages
self.violations = dict()
# if --rule-texts is specified this dictionary
# is loaded with descriptions of each rule
# by rule number (in hundreds).
# ie rule 1.2 becomes 102
self.ruleTexts = dict()
self.ruleText_filename = None
# Dictionary of dictionaries for rules to suppress
# Dict1 is keyed by rule number in the hundreds format of
# Major * 100 + minor. ie Rule 5.2 = (5*100) + 2
# Dict 2 is keyed by filename. An entry of None means suppress globally.
# Each file name entry contains a list of tuples of (lineNumber, symbolName)
# or an item of None which indicates suppress rule for the entire file.
# The line and symbol name tuple may have None as either of its elements but
# should not be None for both.
self.suppressedRules = dict()
# Prefix to ignore when matching suppression files.
self.filePrefix = None
# Number of all violations suppressed per rule
self.suppressionStats = dict()
self.stdversion = stdversion
self.severity = None
self.existing_violations = set()
self._ctu_summary_typedefs = False
self._ctu_summary_tagnames = False
self._ctu_summary_identifiers = False
self._ctu_summary_usage = False
self.path_premium_addon = None
def __repr__(self):
attrs = ["settings", "verify_expected", "verify_actual", "violations",
"ruleTexts", "suppressedRules", "filePrefix",
"suppressionStats", "stdversion", "severity"]
return "{}({})".format(
"MisraChecker",
", ".join(("{}={}".format(a, repr(getattr(self, a))) for a in attrs))
)
def get_num_significant_naming_chars(self, cfg):
if cfg.standards and cfg.standards.c == "c89":
return 31
else:
return 63
def _save_ctu_summary_typedefs(self, dumpfile, typedef_info):
if self._ctu_summary_typedefs:
return
self._ctu_summary_typedefs = True
summary = []
for ti in typedef_info:
summary.append({ 'name': ti.name, 'file': ti.file, 'line': ti.linenr, 'column': ti.column, 'used': ti.used })
if len(summary) > 0:
cppcheckdata.reportSummary(dumpfile, 'MisraTypedefInfo', summary)
def _save_ctu_summary_tagnames(self, dumpfile, cfg):
if self._ctu_summary_tagnames:
return
self._ctu_summary_tagnames = True
summary = []
# structs/enums
for scope in cfg.scopes:
if scope.className is None:
continue
if scope.className.startswith('Anonymous'):
continue
if scope.type not in ('Struct', 'Enum'):
continue
used = False
tok = scope.bodyEnd
while tok:
if tok.str == scope.className:
used = True
break
tok = tok.next
summary.append({'name': scope.className, 'used':used, 'file': scope.bodyStart.file, 'line': scope.bodyStart.linenr, 'column': scope.bodyStart.column})
if len(summary) > 0:
cppcheckdata.reportSummary(dumpfile, 'MisraTagName', summary)
def _save_ctu_summary_identifiers(self, dumpfile, cfg):
if self._ctu_summary_identifiers:
return
self._ctu_summary_identifiers = True
external_identifiers = []
internal_identifiers = []
local_identifiers = []
def identifier(nameToken):
return {'name':nameToken.str, 'file':nameToken.file, 'line':nameToken.linenr, 'column':nameToken.column}
names = []
for var in cfg.variables:
if var.nameToken is None:
continue
if var.access != 'Global':
if var.nameToken.str in names:
continue
names.append(var.nameToken.str)
local_identifiers.append(identifier(var.nameToken))
elif var.isStatic:
names.append(var.nameToken.str)
i = identifier(var.nameToken)
i['inlinefunc'] = False
internal_identifiers.append(i)
else:
names.append(var.nameToken.str)
i = identifier(var.nameToken)
i['decl'] = var.isExtern
external_identifiers.append(i)
for func in cfg.functions:
if func.tokenDef is None:
continue
if func.isStatic:
i = identifier(func.tokenDef)
i['inlinefunc'] = func.isInlineKeyword
internal_identifiers.append(i)
else:
if func.token is None:
i = identifier(func.tokenDef)
else:
i = identifier(func.token)
i['decl'] = func.token is None
external_identifiers.append(i)
cppcheckdata.reportSummary(dumpfile, 'MisraExternalIdentifiers', external_identifiers)
cppcheckdata.reportSummary(dumpfile, 'MisraInternalIdentifiers', internal_identifiers)
cppcheckdata.reportSummary(dumpfile, 'MisraLocalIdentifiers', local_identifiers)
def _save_ctu_summary_usage(self, dumpfile, cfg):
if self._ctu_summary_usage:
return
self._ctu_summary_usage = True
names = []
for token in cfg.tokenlist:
if not token.isName:
continue
if token.function and token.scope.isExecutable:
if (not token.function.isStatic) and (token.str not in names):
names.append({'name': token.str, 'file': token.file})
elif token.variable:
if token == token.variable.nameToken:
continue
if token.variable.access == 'Global' and (not token.variable.isStatic) and (token.str not in names):
names.append({'name': token.str, 'file': token.file})
if len(names) > 0:
cppcheckdata.reportSummary(dumpfile, 'MisraUsage', names)
def misra_1_2(self, cfg):
# gcc language extensions: https://gcc.gnu.org/onlinedocs/gcc/C-Extensions.html
for token in cfg.tokenlist:
if simpleMatch(token, '? :'):
self.reportError(token, 1, 2)
elif simpleMatch(token, '( {') and simpleMatch(token.next.link.previous, '; } )'):
self.reportError(token, 1, 2)
def misra_1_4(self, cfg):
for token in cfg.tokenlist:
if token.str in ('_Atomic', '_Noreturn', '_Generic', '_Thread_local', '_Alignas', '_Alignof'):
self.reportError(token, 1, 4)
if token.str.endswith('_s') and isFunctionCall(token.next):
# See C specification C11 - Annex K, page 578
if token.str in ('tmpfile_s', 'tmpnam_s', 'fopen_s', 'freopen_s', 'fprintf_s', 'fscanf_s', 'printf_s', 'scanf_s',
'snprintf_s', 'sprintf_s', 'sscanf_s', 'vfprintf_s', 'vfscanf_s', 'vprintf_s', 'vscanf_s',
'vsnprintf_s', 'vsprintf_s', 'vsscanf_s', 'gets_s', 'set_constraint_handler_s', 'abort_handler_s',
'ignore_handler_s', 'getenv_s', 'bsearch_s', 'qsort_s', 'wctomb_s', 'mbstowcs_s', 'wcstombs_s',
'memcpy_s', 'memmove_s', 'strcpy_s', 'strncpy_s', 'strcat_s', 'strncat_s', 'strtok_s', 'memset_s',
'strerror_s', 'strerrorlen_s', 'strnlen_s', 'asctime_s', 'ctime_s', 'gmtime_s', 'localtime_s',
'fwprintf_s', 'fwscanf_s', 'snwprintf_s', 'swprintf_s', 'swscanf_s', 'vfwprintf_s', 'vfwscanf_s',
'vsnwprintf_s', 'vswprintf_s', 'vswscanf_s', 'vwprintf_s', 'vwscanf_s', 'wprintf_s', 'wscanf_s',
'wcscpy_s', 'wcsncpy_s', 'wmemcpy_s', 'wmemmove_s', 'wcscat_s', 'wcsncat_s', 'wcstok_s', 'wcsnlen_s',
'wcrtomb_s', 'mbsrtowcs_s', 'wcsrtombs_s'):
self.reportError(token, 1, 4)
def misra_2_2(self, cfg):
for token in cfg.tokenlist:
if token.isExpandedMacro:
continue
if (token.str in '+-') and token.astOperand2:
if simpleMatch(token.astOperand1, '0'):
self.reportError(token.astOperand1, 2, 2)
elif simpleMatch(token.astOperand2, '0'):
self.reportError(token.astOperand2, 2, 2)
if token.str == '*' and token.astOperand2:
if simpleMatch(token.astOperand2, '0'):
self.reportError(token.astOperand1, 2, 2)
elif simpleMatch(token.astOperand1, '0'):
self.reportError(token.astOperand2, 2, 2)
elif simpleMatch(token.astOperand1, '1'):
self.reportError(token.astOperand1, 2, 2)
elif simpleMatch(token.astOperand2, '1'):
self.reportError(token.astOperand2, 2, 2)
def misra_2_3(self, dumpfile, typedefInfo):
self._save_ctu_summary_typedefs(dumpfile, typedefInfo)
def misra_2_4(self, dumpfile, cfg):
self._save_ctu_summary_tagnames(dumpfile, cfg)
def misra_2_5(self, dumpfile, cfg):
used_macros = list()
for m in cfg.macro_usage:
used_macros.append(m.name)
summary = []
for directive in cfg.directives:
res = re.match(r'#define[ \t]+([a-zA-Z_][a-zA-Z_0-9]*).*', directive.str)
if res:
macro_name = res.group(1)
summary.append({'name': macro_name, 'used': (macro_name in used_macros), 'file': directive.file, 'line': directive.linenr, 'column': directive.column})
if len(summary) > 0:
cppcheckdata.reportSummary(dumpfile, 'MisraMacro', summary)
def misra_2_7(self, data):
for func in data.functions:
# Skip function with no parameter
if len(func.argument) == 0:
continue
# Setup list of function parameters
func_param_list = list()
for arg in func.argument:
func_arg = func.argument[arg]
if func_arg.typeStartToken and func_arg.typeStartToken.str == '...':
continue
func_param_list.append(func_arg)
# Search for scope of current function
for scope in data.scopes:
if (scope.type == "Function") and (scope.function == func):
# Search function body: remove referenced function parameter from list
token = scope.bodyStart
while token.next is not None and token != scope.bodyEnd and len(func_param_list) > 0:
if token.variable is not None and token.variable in func_param_list:
func_param_list.remove(token.variable)
token = token.next
# Emit a warning for each unused variable, but no more that one warning per line
reported_linenrs = set()
for func_param in func_param_list:
if func_param.nameToken:
linenr = func_param.nameToken
if linenr not in reported_linenrs:
self.reportError(func_param.nameToken, 2, 7)
reported_linenrs.add(linenr)
else:
linenr = func.tokenDef.linenr
if linenr not in reported_linenrs:
self.reportError(func.tokenDef, 2, 7)
reported_linenrs.add(linenr)
def misra_3_1(self, rawTokens):
for token in rawTokens:
starts_with_double_slash = token.str.startswith('//')
starts_with_block_comment = token.str.startswith("/*")
s = token.str.lstrip('/')
if (starts_with_double_slash or starts_with_block_comment) and "/*" in s:
# Block comment inside of regular comment, violation
self.reportError(token, 3, 1)
elif starts_with_block_comment and "//" in s:
# "//" in block comment, check if it's a uri
while "//" in s:
possible_uri, s = s.split("//", 1)
if not re.search(r"\w+:$", possible_uri):
# Violation if no uri was found
self.reportError(token, 3, 1)
break
def misra_3_2(self, rawTokens):
for token in rawTokens:
if token.str.startswith('//'):
# Check for comment ends with trigraph which might be replaced
# by a backslash.
if token.str.endswith('??/'):
self.reportError(token, 3, 2)
# Check for comment which has been merged with subsequent line
# because it ends with backslash.
# The last backslash is no more part of the comment token thus
# check if next token exists and compare line numbers.
elif (token.next is not None) and (token.linenr == token.next.linenr):
self.reportError(token, 3, 2)
def misra_4_1(self, rawTokens):
for token in rawTokens:
if (token.str[0] != '"') and (token.str[0] != '\''):
continue
if len(token.str) < 3:
continue
delimiter = token.str[0]
symbols = token.str[1:-1]
# No closing delimiter. This will not compile.
if token.str[-1] != delimiter:
continue
if len(symbols) < 2:
continue
if not hasNumericEscapeSequence(symbols):
continue
# String literals that contains one or more escape sequences. All of them should be
# terminated.
for sequence in ['\\' + t for t in symbols.split('\\')][1:]:
if (isHexEscapeSequence(sequence) or isOctalEscapeSequence(sequence) or
isSimpleEscapeSequence(sequence)):
continue
else:
self.reportError(token, 4, 1)
def misra_4_2(self, rawTokens):
for token in rawTokens:
if (token.str[0] != '"') or (token.str[-1] != '"'):
continue
# Check for trigraph sequence as defined by ISO/IEC 9899:1999
for sequence in ['??=', '??(', '??/', '??)', '??\'', '??<', '??!', '??>', '??-']:
if sequence in token.str[1:-1]:
# First trigraph sequence match, report error and leave loop.
self.reportError(token, 4, 2)
break
def misra_5_1(self, data):
long_vars = {}
num_sign_chars = self.get_num_significant_naming_chars(data)
for var in data.variables:
if var.nameToken is None:
continue
if len(var.nameToken.str) <= num_sign_chars:
continue
if not hasExternalLinkage(var):
continue
long_vars.setdefault(var.nameToken.str[:num_sign_chars], []).append(var.nameToken)
for name_prefix in long_vars:
tokens = long_vars[name_prefix]
if len(tokens) < 2:
continue
for tok in sorted(tokens, key=lambda t: (t.linenr, t.column))[1:]:
self.reportError(tok, 5, 1)
def misra_5_2(self, data):
scopeVars = {}
num_sign_chars = self.get_num_significant_naming_chars(data)
for var in data.variables:
if var.nameToken is None:
continue
if len(var.nameToken.str) <= num_sign_chars:
continue
if var.nameToken.scope not in scopeVars:
scopeVars.setdefault(var.nameToken.scope, {})["varlist"] = []
scopeVars.setdefault(var.nameToken.scope, {})["scopelist"] = []
scopeVars[var.nameToken.scope]["varlist"].append(var)
for scope in data.scopes:
if scope.nestedIn and scope.className:
if scope.nestedIn not in scopeVars:
scopeVars.setdefault(scope.nestedIn, {})["varlist"] = []
scopeVars.setdefault(scope.nestedIn, {})["scopelist"] = []
scopeVars[scope.nestedIn]["scopelist"].append(scope)
for scope in scopeVars:
if len(scopeVars[scope]["varlist"]) <= 1:
continue
for i, variable1 in enumerate(scopeVars[scope]["varlist"]):
for variable2 in scopeVars[scope]["varlist"][i + 1:]:
if variable1.isArgument and variable2.isArgument:
continue
if hasExternalLinkage(variable1) or hasExternalLinkage(variable2):
continue
if (variable1.nameToken.str[:num_sign_chars] == variable2.nameToken.str[:num_sign_chars] and
variable1 is not variable2):
if int(variable1.nameToken.linenr) > int(variable2.nameToken.linenr):
self.reportError(variable1.nameToken, 5, 2)
else:
self.reportError(variable2.nameToken, 5, 2)
for innerscope in scopeVars[scope]["scopelist"]:
if variable1.nameToken.str[:num_sign_chars] == innerscope.className[:num_sign_chars]:
if int(variable1.nameToken.linenr) > int(innerscope.bodyStart.linenr):
self.reportError(variable1.nameToken, 5, 2)
else:
self.reportError(innerscope.bodyStart, 5, 2)
if len(scopeVars[scope]["scopelist"]) <= 1:
continue
for i, scopename1 in enumerate(scopeVars[scope]["scopelist"]):
for scopename2 in scopeVars[scope]["scopelist"][i + 1:]:
if scopename1.className[:num_sign_chars] == scopename2.className[:num_sign_chars]:
if int(scopename1.bodyStart.linenr) > int(scopename2.bodyStart.linenr):
self.reportError(scopename1.bodyStart, 5, 2)
else:
self.reportError(scopename2.bodyStart, 5, 2)
def misra_5_4(self, data):
num_sign_chars = self.get_num_significant_naming_chars(data)
macro = {}
compile_name = re.compile(r'#define ([a-zA-Z0-9_]+)')
compile_param = re.compile(r'#define ([a-zA-Z0-9_]+)[(]([a-zA-Z0-9_, ]+)[)]')
short_names = {}
macro_w_arg = []
for dir in data.directives:
res1 = compile_name.match(dir.str)
if res1:
if dir not in macro:
macro.setdefault(dir, {})["name"] = []
macro.setdefault(dir, {})["params"] = []
full_name = res1.group(1)
macro[dir]["name"] = full_name
short_name = full_name[:num_sign_chars]
if short_name in short_names:
_dir = short_names[short_name]
if full_name != macro[_dir]["name"]:
self.reportError(dir, 5, 4)
else:
short_names[short_name] = dir
res2 = compile_param.match(dir.str)
if res2:
res_gp2 = res2.group(2).split(",")
res_gp2 = [macroname.replace(" ", "") for macroname in res_gp2]
macro[dir]["params"].extend(res_gp2)
macro_w_arg.append(dir)
for mvar in macro_w_arg:
for i, macroparam1 in enumerate(macro[mvar]["params"]):
for j, macroparam2 in enumerate(macro[mvar]["params"]):
if j > i and macroparam1[:num_sign_chars] == macroparam2[:num_sign_chars]:
self.reportError(mvar, 5, 4)
param = macroparam1
if param[:num_sign_chars] in short_names:
m_var1 = short_names[param[:num_sign_chars]]
if m_var1.linenr > mvar.linenr:
self.reportError(m_var1, 5, 4)
else:
self.reportError(mvar, 5, 4)
def misra_5_5(self, data):
num_sign_chars = self.get_num_significant_naming_chars(data)
macroNames = {}
compiled = re.compile(r'#define ([A-Za-z0-9_]+)')
for dir in data.directives:
res = compiled.match(dir.str)
if res:
macroNames[res.group(1)[:num_sign_chars]] = dir
for var in data.variables:
if var.nameToken and var.nameToken.str[:num_sign_chars] in macroNames:
self.reportError(var.nameToken, 5, 5)
for scope in data.scopes:
if scope.className and scope.className[:num_sign_chars] in macroNames:
self.reportError(scope.bodyStart, 5, 5)
def misra_5_6(self, dumpfile, typedefInfo):
self._save_ctu_summary_typedefs(dumpfile, typedefInfo)
def misra_5_7(self, dumpfile, cfg):
self._save_ctu_summary_tagnames(dumpfile, cfg)
def misra_5_8(self, dumpfile, cfg):
self._save_ctu_summary_identifiers(dumpfile, cfg)
def misra_5_9(self, dumpfile, cfg):
self._save_ctu_summary_identifiers(dumpfile, cfg)
def misra_6_1(self, data):
# Bitfield type must be bool or explicitly signed/unsigned int
for token in data.tokenlist:
if not token.valueType:
continue
if token.valueType.bits == 0:
continue
if not token.variable:
continue
if not token.scope:
continue
if token.scope.type not in 'Struct':
continue
if data.standards.c == 'c89':
if token.valueType.type != 'int' and not isUnsignedType(token.variable.typeStartToken.str):
self.reportError(token, 6, 1)
elif data.standards.c == 'c99':
if token.valueType.type == 'bool':
continue
isExplicitlySignedOrUnsigned = False
typeToken = token.variable.typeStartToken
while typeToken:
if typeToken.isUnsigned or typeToken.isSigned or isUnsignedType(typeToken.str):
isExplicitlySignedOrUnsigned = True
break
if typeToken is token.variable.typeEndToken:
break
typeToken = typeToken.next
if not isExplicitlySignedOrUnsigned:
self.reportError(token, 6, 1)
def misra_6_2(self, data):
# Bitfields of size 1 can not be signed
for token in data.tokenlist:
if not token.valueType:
continue
if not token.scope:
continue
if token.scope.type not in 'Struct':
continue
if token.valueType.bits == 1 and token.valueType.sign == 'signed':
self.reportError(token, 6, 2)
def misra_7_1(self, rawTokens):
compiled = re.compile(r'^0[0-7]+$')
for tok in rawTokens:
if compiled.match(tok.str):
self.reportError(tok, 7, 1)
def misra_7_2(self, data):
for token in data.tokenlist:
if token.isInt and ('U' not in token.str.upper()) and token.valueType and token.valueType.sign == 'unsigned':
self.reportError(token, 7, 2)
def misra_7_3(self, rawTokens):
compiled = re.compile(r'^[0-9.]+[Uu]*l+[Uu]*$')
for tok in rawTokens:
if compiled.match(tok.str):
self.reportError(tok, 7, 3)
def misra_7_4(self, data):
# A string literal shall not be assigned to an object unless the object's type
# is constant.
def reportErrorIfVariableIsNotConst(variable, stringLiteral):
if variable.valueType:
if (variable.valueType.constness % 2) != 1:
self.reportError(stringLiteral, 7, 4)
for token in data.tokenlist:
if token.isString:
# Check normal variable assignment
variable = getAssignedVariableToken(token)
if variable:
reportErrorIfVariableIsNotConst(variable, token)
# Check use as return value
function = getFunctionUsingReturnValue(token)
if function:
# "Primitive" test since there is no info available on return value type
if not tokenFollowsSequence(function.tokenDef, ['const', 'char', '*']):
self.reportError(token, 7, 4)
# Check use as function parameter
if isFunctionCall(token) and token.astOperand1 and token.astOperand1.function:
functionDeclaration = token.astOperand1.function
if functionDeclaration.tokenDef:
if functionDeclaration.tokenDef is token.astOperand1:
# Token is not a function call, but it is the definition of the function
continue
parametersUsed = getArguments(token)
for i in range(len(parametersUsed)):
usedParameter = parametersUsed[i]
parameterDefinition = functionDeclaration.argument.get(i+1)
if usedParameter.isString and parameterDefinition and parameterDefinition.nameToken:
reportErrorIfVariableIsNotConst(parameterDefinition.nameToken, usedParameter)
def misra_8_1(self, cfg):
for token in cfg.tokenlist:
if token.isImplicitInt and not token.isUnsigned and not token.isSigned:
self.reportError(token, 8, 1)
def misra_8_2(self, data, rawTokens):
def getFollowingRawTokens(rawTokens, token, count):
following =[]
for rawToken in rawTokens:
if (rawToken.file == token.file and
rawToken.linenr == token.linenr and
rawToken.column == token.column):
for _ in range(count):
rawToken = rawToken.next
# Skip comments
while rawToken and (rawToken.str.startswith('/*') or rawToken.str.startswith('//')):
rawToken = rawToken.next
if rawToken is None:
break
following.append(rawToken)
return following
# Zero arguments should be in form ( void )
def checkZeroArguments(func, startCall, endCall):
if not startCall.isRemovedVoidParameter and len(func.argument) == 0:
if func.tokenDef.next:
self.reportError(func.tokenDef.next, 8, 2)
else:
self.reportError(func.tokenDef, 8, 2)
def checkDeclarationArgumentsViolations(func, startCall, endCall):
# Collect the tokens for the arguments in function definition
argNameTokens = set()
for arg in func.argument:
argument = func.argument[arg]
typeStartToken = argument.typeStartToken
if typeStartToken is None:
continue
nameToken = argument.nameToken
if nameToken is None:
continue
argNameTokens.add(nameToken)
# Check if we have the same number of variables in both the
# declaration and the definition.
#
# TODO: We actually need to check if the names of the arguments are
# the same. But we can't do this because we have no links to
# variables in the arguments in function definition in the dump file.
foundVariables = 0
while startCall and startCall != endCall:
if startCall.varId:
foundVariables += 1
startCall = startCall.next
if len(argNameTokens) != foundVariables:
if func.tokenDef.next:
self.reportError(func.tokenDef.next, 8, 2)
else:
self.reportError(func.tokenDef, 8, 2)
def checkDefinitionArgumentsViolations(func, startCall, endCall):
for arg in func.argument:
argument = func.argument[arg]
typeStartToken = argument.typeStartToken
if typeStartToken is None:
continue
# Arguments should have a name unless variable length arg
nameToken = argument.nameToken
if nameToken is None and typeStartToken.str != '...':
self.reportError(typeStartToken, 8, 2)
# Type declaration on next line (old style declaration list) is not allowed
if typeStartToken.linenr > endCall.linenr:
self.reportError(typeStartToken, 8, 2)
# Check arguments in function declaration
for func in data.functions:
# Check arguments in function definition
tokenImpl = func.token
if tokenImpl:
startCall = tokenImpl.next
if startCall is None or startCall.str != '(':
continue
endCall = startCall.link
if endCall is None or endCall.str != ')':
continue
checkZeroArguments(func, startCall, endCall)
checkDefinitionArgumentsViolations(func, startCall, endCall)
# Check arguments in function declaration
tokenDef = func.tokenDef
if tokenDef:
startCall = func.tokenDef.next
if startCall is None or startCall.str != '(':
continue
endCall = startCall.link
if endCall is None or endCall.str != ')':
continue
checkZeroArguments(func, startCall, endCall)
if tokenImpl:
checkDeclarationArgumentsViolations(func, startCall, endCall)
else:
# When there is no function definition, we should execute
# its checks for the declaration token. The point is that without
# a known definition we have no Function.argument list required
# for declaration check.
checkDefinitionArgumentsViolations(func, startCall, endCall)
# Check arguments in pointer declarations
for var in data.variables:
if not var.isPointer:
continue
if var.nameToken is None:
continue
rawTokensFollowingPtr = getFollowingRawTokens(rawTokens, var.nameToken, 3)
if len(rawTokensFollowingPtr) != 3:
continue
# Compliant: returnType (*ptrName) ( ArgType )
# Non-compliant: returnType (*ptrName) ( )
if (rawTokensFollowingPtr[0].str == ')' and
rawTokensFollowingPtr[1].str == '(' and
rawTokensFollowingPtr[2].str == ')'):
self.reportError(var.nameToken, 8, 2)
def misra_8_4(self, cfg):
for func in cfg.functions:
if func.isStatic:
continue
if func.token is None:
continue
if not is_source_file(func.token.file):
continue
if func.token != func.tokenDef:
continue
if func.tokenDef.str == 'main':
continue
self.reportError(func.tokenDef, 8, 4)
extern_vars = []
var_defs = []
for var in cfg.variables:
if not var.isGlobal:
continue
if var.isStatic:
continue
if var.nameToken is None:
continue
if var.isExtern:
extern_vars.append(var.nameToken.str)
else:
var_defs.append(var.nameToken)
for vartok in var_defs:
if vartok.str not in extern_vars:
self.reportError(vartok, 8, 4)
def misra_8_5(self, dumpfile, cfg):
self._save_ctu_summary_identifiers(dumpfile, cfg)
def misra_8_6(self, dumpfile, cfg):
self._save_ctu_summary_identifiers(dumpfile, cfg)
def misra_8_7(self, dumpfile, cfg):
self._save_ctu_summary_usage(dumpfile, cfg)
def misra_8_8(self, cfg):
vars = {}
for var in cfg.variables:
if var.access != 'Global':
continue
if var.nameToken is None:
continue
varname = var.nameToken.str
if varname in vars:
vars[varname].append(var)
else:
vars[varname] = [var]
for varname, varlist in vars.items():
static_var = None
extern_var = None
for var in varlist:
if var.isStatic:
static_var = var
elif var.isExtern:
extern_var = var
if static_var and extern_var:
self.reportError(extern_var.nameToken, 8, 8)
def misra_8_9(self, cfg):
variables = {}
for scope in cfg.scopes:
if scope.type != 'Function':
continue
variables_used_in_scope = []
tok = scope.bodyStart
while tok != scope.bodyEnd:
if tok.variable and tok.variable.access == 'Global' and tok.variable.isStatic:
if tok.variable not in variables_used_in_scope:
variables_used_in_scope.append(tok.variable)
tok = tok.next
for var in variables_used_in_scope:
if var in variables:
variables[var] += 1
else:
variables[var] = 1
for var, count in variables.items():
if count == 1:
self.reportError(var.nameToken, 8, 9)
def misra_8_10(self, cfg):
for func in cfg.functions:
if func.isInlineKeyword and not func.isStatic:
self.reportError(func.tokenDef, 8, 10)
def misra_8_11(self, data):
for var in data.variables:
if var.isExtern and simpleMatch(var.nameToken.next, '[ ]') and var.nameToken.scope.type == 'Global':
self.reportError(var.nameToken, 8, 11)
def misra_8_12(self, data):
for scope in data.scopes:
if scope.type != 'Enum':
continue
enum_values = []
implicit_enum_values = []
e_token = scope.bodyStart.next
while e_token != scope.bodyEnd:
if e_token.str == '(':
e_token = e_token.link
continue
if e_token.previous.str not in ',{':
e_token = e_token.next
continue
if e_token.isName and e_token.values and e_token.valueType and e_token.valueType.typeScope == scope:
token_values = [v.intvalue for v in e_token.values]
enum_values += token_values
if e_token.next.str != "=":
implicit_enum_values += token_values
e_token = e_token.next
for implicit_enum_value in implicit_enum_values:
if enum_values.count(implicit_enum_value) != 1:
self.reportError(scope.bodyStart, 8, 12)
def misra_8_14(self, rawTokens):
for token in rawTokens:
if token.str == 'restrict':
self.reportError(token, 8, 14)
def misra_9_2(self, data):
misra_9.misra_9_x(self, data, 902)
def misra_9_3(self, data):
misra_9.misra_9_x(self, data, 903)
def misra_9_4(self, data):
misra_9.misra_9_x(self, data, 904)
def misra_9_5(self, data, rawTokens):
misra_9.misra_9_x(self, data, 905, rawTokens)
#for token in rawTokens:
# if simpleMatch(token, '[ ] = { ['):
# self.reportError(token, 9, 5)
def misra_10_1(self, data):
for token in data.tokenlist:
if not token.isOp:
continue
for t1, t2 in itertools.product(
list(getTernaryOperandsRecursive(token.astOperand1) or [token.astOperand1]),
list(getTernaryOperandsRecursive(token.astOperand2) or [token.astOperand2]),
):
e1 = getEssentialTypeCategory(t1)
e2 = getEssentialTypeCategory(t2)
if not e1 or not e2:
continue
if token.str in ('<<', '>>'):
if not isUnsignedType(e1):
self.reportError(token, 10, 1)
elif not isUnsignedType(e2) and not token.astOperand2.isNumber:
self.reportError(token, 10, 1)
elif token.str in ('~', '&', '|', '^'):
e1_et = getEssentialType(token.astOperand1)
e2_et = getEssentialType(token.astOperand2)
if e1_et == 'char' or e2_et == 'char':
self.reportError(token, 10, 1)
def misra_10_2(self, data):
def isEssentiallySignedOrUnsigned(op):
e = getEssentialType(op)
return e and (e.split(' ')[0] in ('unsigned', 'signed'))
def isEssentiallyChar(op):
if op is None:
return False
if op.str == '+':
return isEssentiallyChar(op.astOperand1) or isEssentiallyChar(op.astOperand2)
return op.isChar
for token in data.tokenlist:
if token.str not in ('+', '-'):
continue
if (not isEssentiallyChar(token.astOperand1)) and (not isEssentiallyChar(token.astOperand2)):
continue
if token.str == '+':
if isEssentiallyChar(token.astOperand1) and not isEssentiallySignedOrUnsigned(token.astOperand2):
self.reportError(token, 10, 2)
if isEssentiallyChar(token.astOperand2) and not isEssentiallySignedOrUnsigned(token.astOperand1):
self.reportError(token, 10, 2)
if token.str == '-':
e1 = getEssentialType(token.astOperand1)
if e1 and e1.split(' ')[-1] != 'char':
self.reportError(token, 10, 2)
if not isEssentiallyChar(token.astOperand2) and not isEssentiallySignedOrUnsigned(token.astOperand2):
self.reportError(token, 10, 2)
def misra_10_3(self, cfg):
def get_category(essential_type):
if essential_type:
if essential_type in ('bool', 'char'):
return essential_type
if essential_type.split(' ')[-1] in ('float', 'double'):
return 'floating'
if essential_type.split(' ')[0] in ('unsigned', 'signed'):
return essential_type.split(' ')[0]
return None
for tok in cfg.tokenlist:
if tok.isAssignmentOp:
lhs = getEssentialType(tok.astOperand1)
rhs = getEssentialType(tok.astOperand2)
#print(lhs)
#print(rhs)
if lhs is None or rhs is None:
continue
lhs_category = get_category(lhs)
rhs_category = get_category(rhs)
if lhs_category and rhs_category and lhs_category != rhs_category and rhs_category not in ('signed','unsigned'):
self.reportError(tok, 10, 3)
if bitsOfEssentialType(lhs) < bitsOfEssentialType(rhs):
self.reportError(tok, 10, 3)
def misra_10_4(self, data):
op = {'+', '-', '*', '/', '%', '&', '|', '^', '+=', '-=', ':'}
for token in data.tokenlist:
if token.str not in op and not token.isComparisonOp:
continue
if not token.astOperand1 or not token.astOperand2:
continue
if not token.astOperand1.valueType or not token.astOperand2.valueType:
continue
if ((token.astOperand1.str in op or token.astOperand1.isComparisonOp) and
(token.astOperand2.str in op or token.astOperand2.isComparisonOp)):
e1, e2 = getEssentialCategorylist(token.astOperand1.astOperand2, token.astOperand2.astOperand1)
elif token.astOperand1.str in op or token.astOperand1.isComparisonOp:
e1, e2 = getEssentialCategorylist(token.astOperand1.astOperand2, token.astOperand2)
elif token.astOperand2.str in op or token.astOperand2.isComparisonOp:
e1, e2 = getEssentialCategorylist(token.astOperand1, token.astOperand2.astOperand1)
else:
e1, e2 = getEssentialCategorylist(token.astOperand1, token.astOperand2)
if token.str == "+=" or token.str == "+":
if e1 == "char" and (e2 == "signed" or e2 == "unsigned"):
continue
if e2 == "char" and (e1 == "signed" or e1 == "unsigned"):
continue
if token.str == "-=" or token.str == "-":
if e1 == "char" and (e2 == "signed" or e2 == "unsigned"):
continue
if e1 and e2 and (e1.find('Anonymous') != -1 and (e2 == "signed" or e2 == "unsigned")):
continue
if e1 and e2 and (e2.find('Anonymous') != -1 and (e1 == "signed" or e1 == "unsigned")):
continue
if e1 and e2 and e1 != e2:
self.reportError(token, 10, 4)
def misra_10_5(self, cfg):
def _get_essential_category(token):
essential_type = getEssentialType(token)
#print(essential_type)
if essential_type:
if essential_type in ('bool', 'char'):
return essential_type
if essential_type.split(' ')[-1] in ('float', 'double'):
return 'floating'
if essential_type.split(' ')[0] in ('unsigned', 'signed'):
return essential_type.split(' ')[0]
return None
for token in cfg.tokenlist:
if not isCast(token):
continue
to_type = _get_essential_category(token)
#print(to_type)
if to_type is None:
continue
from_type = _get_essential_category(token.astOperand1)
#print(from_type)
if from_type is None:
continue
if to_type == from_type:
continue
if to_type == 'bool' or from_type == 'bool':
if token.astOperand1.isInt and token.astOperand1.getKnownIntValue() == 1:
# Exception
continue
self.reportError(token, 10, 5)
continue
if to_type == 'enum':
self.reportError(token, 10, 5)
continue
if from_type == 'float' and to_type == 'char':
self.reportError(token, 10, 5)
continue
if from_type == 'char' and to_type == 'float':
self.reportError(token, 10, 5)
continue
def misra_10_6(self, data):
for token in data.tokenlist:
if token.str != '=' or not token.astOperand1 or not token.astOperand2:
continue
if not is_composite_expr(token.astOperand2):
continue
vt1 = token.astOperand1.valueType
vt2 = token.astOperand2.valueType
if not vt1 or vt1.pointer > 0:
continue
if not vt2 or vt2.pointer > 0:
continue
try:
if isCast(token.astOperand2):
e = vt2.type
else:
e = getEssentialType(token.astOperand2)
if not e:
continue
if e == "char" and vt1.type == "int":
# When arithmetic operations are performed on char values, they are usually promoted to int
continue
lhsbits = vt1.bits if vt1.bits else bitsOfEssentialType(vt1.type)
if lhsbits > bitsOfEssentialType(e):
self.reportError(token, 10, 6)
except ValueError:
pass
def misra_10_7(self, cfg):
for token in cfg.tokenlist:
if token.astOperand1 is None or token.astOperand2 is None:
continue
if not token.isArithmeticalOp:
continue
if not is_composite_expr(token):
continue
parent = token.astParent
if parent is None:
continue
if not parent.isArithmeticalOp:
if not parent.isAssignmentOp:
continue
if parent.str == '=':
continue
token_type = getEssentialType(token)
if token_type is None:
continue
sibling = parent.astOperand1 if (token == parent.astOperand2) else parent.astOperand2
sibling_type = getEssentialType(sibling)
if sibling_type is None:
continue
b1 = bitsOfEssentialType(token_type)
b2 = bitsOfEssentialType(sibling_type)
if b1 > 0 and b1 < b2:
self.reportError(token, 10, 7)
def misra_10_8(self, data):
for token in data.tokenlist:
if not isCast(token):
continue
if not token.valueType or token.valueType.pointer > 0:
continue
if not token.astOperand1.valueType or token.astOperand1.valueType.pointer > 0:
continue
if not token.astOperand1.astOperand1:
continue
if token.astOperand1.str not in ('+', '-', '*', '/', '%', '&', '|', '^', '>>', "<<", "?", ":", '~'):
continue
if token.astOperand1.str != '~' and not token.astOperand1.astOperand2:
continue
if token.astOperand1.str == '~':
e2 = getEssentialTypeCategory(token.astOperand1.astOperand1)
else:
e2, e3 = getEssentialCategorylist(token.astOperand1.astOperand1, token.astOperand1.astOperand2)
if e2 != e3:
continue
e1 = getEssentialTypeCategory(token)
if e1 != e2:
self.reportError(token, 10, 8)
else:
try:
e = getEssentialType(token.astOperand1)
if not e:
continue
if bitsOfEssentialType(token.valueType.type) > bitsOfEssentialType(e):
self.reportError(token, 10, 8)
except ValueError:
pass
def misra_11_1(self, data):
for token in data.tokenlist:
to_from = get_type_conversion_to_from(token)
if to_from is None:
continue
from_type = get_function_pointer_type(to_from[1])
if from_type is None:
continue
to_type = get_function_pointer_type(to_from[0])
if to_type is None or to_type != from_type:
self.reportError(token, 11, 1)
def misra_11_2(self, data):
def get_pointer_type(type_token):
while type_token and (type_token.str in ('const', 'struct')):
type_token = type_token.next
if type_token is None:
return None
if not type_token.isName:
return None
return type_token if (type_token.next and type_token.next.str == '*') else None
incomplete_types = []
for token in data.tokenlist:
if token.str == 'struct' and token.next and token.next.next and token.next.isName and token.next.next.str == ';':
incomplete_types.append(token.next.str)
to_from = get_type_conversion_to_from(token)
if to_from is None:
continue
to_pointer_type_token = get_pointer_type(to_from[0])
if to_pointer_type_token is None:
continue
from_pointer_type_token = get_pointer_type(to_from[1])
if from_pointer_type_token is None:
continue
if to_pointer_type_token.str == from_pointer_type_token.str:
continue
if from_pointer_type_token.typeScope is None and (from_pointer_type_token.str in incomplete_types):
self.reportError(token, 11, 2)
elif to_pointer_type_token.typeScope is None and (to_pointer_type_token.str in incomplete_types):
self.reportError(token, 11, 2)
def misra_11_3(self, data):
for token in data.tokenlist:
if not isCast(token):
continue
vt1 = token.valueType
vt2 = token.astOperand1.valueType
if not vt1 or not vt2:
continue
if vt1.type == 'void' or vt2.type == 'void':
continue
if (vt1.pointer > 0 and vt1.type == 'record' and
vt2.pointer > 0 and vt2.type == 'record' and
vt1.typeScopeId != vt2.typeScopeId):
self.reportError(token, 11, 3)
elif (vt1.pointer == vt2.pointer and vt1.pointer > 0 and
vt1.type != vt2.type and vt1.type != 'char'):
self.reportError(token, 11, 3)
def misra_11_4(self, data):
# Get list of macro definitions
macros = {}
for directive in data.directives:
#define X ((peripheral_t *)0x40000U)
res = re.match(r'#define ([A-Za-z0-9_]+).*', directive.str)
if res:
if res.group(1) in macros:
macros[res.group(1)].append(directive)
else:
macros[res.group(1)] = [directive]
# If macro definition is non-compliant then warn about the macro definition instead of
# the macro usages. To reduce diagnostics for a non-compliant macro.
bad_macros = []
for token in data.tokenlist:
if not isCast(token):
continue
vt1 = token.valueType
vt2 = token.astOperand1.valueType
if not vt1 or not vt2:
continue
if vt2.pointer > 0 and vt1.pointer == 0 and (vt1.isIntegral() or vt1.isEnum()) and vt2.type != 'void':
self.reportError(token, 11, 4)
elif vt1.pointer > 0 and vt2.pointer == 0 and (vt2.isIntegral() or vt2.isEnum()) and vt1.type != 'void':
if token.macroName is not None and \
token.macroName == token.astOperand1.macroName and \
token.astOperand1.isInt and \
token.link.previous.str == '*' and \
token.macroName == token.link.previous.macroName and \
token.macroName in macros and \
len(macros[token.macroName]) == 1:
if token.macroName not in bad_macros:
bad_macros.append(token.macroName)
self.reportError(macros[token.macroName][0], 11, 4)
continue
self.reportError(token, 11, 4)
def misra_11_5(self, data):
for token in data.tokenlist:
if not isCast(token):
if token.astOperand1 and token.astOperand2 and token.str == "=" and token.next.str != "(":
vt1 = token.astOperand1.valueType
vt2 = token.astOperand2.valueType
if not vt1 or not vt2:
continue
if vt1.pointer > 0 and vt1.type != 'void' and vt2.pointer == vt1.pointer and vt2.type == 'void':
self.reportError(token, 11, 5)
continue
if token.astOperand1.astOperand1 and token.astOperand1.astOperand1.str in (
'malloc', 'calloc', 'realloc', 'free'):
continue
vt1 = token.valueType
vt2 = token.astOperand1.valueType
if not vt1 or not vt2:
continue
if vt1.pointer > 0 and vt1.type != 'void' and vt2.pointer == vt1.pointer and vt2.type == 'void':
self.reportError(token, 11, 5)
def misra_11_6(self, data):
for token in data.tokenlist:
if not isCast(token):
continue
if token.astOperand1.astOperand1:
continue
vt1 = token.valueType
vt2 = token.astOperand1.valueType
if not vt1 or not vt2:
continue
if vt1.pointer == 1 and vt1.type == 'void' and vt2.pointer == 0 and token.astOperand1.getKnownIntValue() != 0:
self.reportError(token, 11, 6)
elif vt1.pointer == 0 and vt1.type != 'void' and vt2.pointer == 1 and vt2.type == 'void':
self.reportError(token, 11, 6)
def misra_11_7(self, data):
for token in data.tokenlist:
if not isCast(token):
continue
vt1 = token.valueType
vt2 = token.astOperand1.valueType
if not vt1 or not vt2:
continue
if token.astOperand1.astOperand1:
continue
if (vt2.pointer > 0 and vt1.pointer == 0 and
not vt1.isIntegral() and not vt1.isEnum() and
vt1.type != 'void'):
self.reportError(token, 11, 7)
elif (vt1.pointer > 0 and vt2.pointer == 0 and
not vt2.isIntegral() and not vt2.isEnum() and
vt1.type != 'void'):
self.reportError(token, 11, 7)
def misra_11_8(self, data):
# TODO: reuse code in CERT-EXP05
for token in data.tokenlist:
if isCast(token):
# C-style cast
if not token.valueType:
continue
if not token.astOperand1.valueType:
continue
if token.valueType.pointer == 0:
continue
if token.astOperand1.valueType.pointer == 0:
continue
const1 = token.valueType.constness
const2 = token.astOperand1.valueType.constness
if (const1 % 2) < (const2 % 2):
self.reportError(token, 11, 8)
elif token.str == '(' and token.astOperand1 and token.astOperand2 and token.astOperand1.function:
# Function call
function = token.astOperand1.function
arguments = getArguments(token)
for argnr, argvar in function.argument.items():
if argnr < 1 or argnr > len(arguments):
continue
if not argvar.isPointer:
continue
argtok = arguments[argnr - 1]
if not argtok.valueType:
continue
if argtok.valueType.pointer == 0:
continue
const1 = argvar.constness
const2 = arguments[argnr - 1].valueType.constness
if (const1 % 2) < (const2 % 2):
self.reportError(token, 11, 8)
def misra_11_9(self, data):
for token in data.tokenlist:
if token.astOperand1 and token.astOperand2 and token.str in ["=", "==", "!=", "?", ":"]:
vt1 = token.astOperand1.valueType
vt2 = token.astOperand2.valueType
if not vt1 or not vt2:
continue
if vt1.pointer > 0 and vt2.pointer == 0 and token.astOperand2.str == "NULL":
continue
if (token.astOperand2.values and vt1.pointer > 0 and
vt2.pointer == 0 and token.astOperand2.values):
if token.astOperand2.getValue(0):
self.reportError(token, 11, 9)
def misra_12_1_sizeof(self, rawTokens):
state = 0
compiled = re.compile(r'^[a-zA-Z_]')
for tok in rawTokens:
if tok.str.startswith('//') or tok.str.startswith('/*'):
continue
if tok.str == 'sizeof':
state = 1
elif state == 1:
if compiled.match(tok.str):
state = 2
else:
state = 0
elif state == 2:
if tok.str in ('+', '-', '*', '/', '%'):
self.reportError(tok, 12, 1)
else:
state = 0
def misra_12_1(self, data):
for token in data.tokenlist:
p = getPrecedence(token)
if p < 2 or p > 12:
continue
p1 = getPrecedence(token.astOperand1)
if p < p1 <= 12 and numberOfParentheses(token.astOperand1, token):
self.reportError(token, 12, 1)
continue
p2 = getPrecedence(token.astOperand2)
if p < p2 <= 12 and numberOfParentheses(token, token.astOperand2):
self.reportError(token, 12, 1)
continue
def misra_12_2(self, data):
for token in data.tokenlist:
if not (token.str in ('<<', '>>')):
continue
if (not token.astOperand2) or (not token.astOperand2.values):
continue
maxval = 0
for val in token.astOperand2.values:
if val.intvalue and val.intvalue > maxval:
maxval = val.intvalue
if maxval == 0:
continue
sz = bitsOfEssentialType(getEssentialType(token.astOperand1))
if sz <= 0:
continue
if maxval >= sz:
self.reportError(token, 12, 2)
def misra_12_3(self, data):
for token in data.tokenlist:
if token.str == ';' and (token.isSplittedVarDeclComma is True):
self.reportError(token, 12, 3)
if token.str == ',' and token.astParent and token.astParent.str == ';':
self.reportError(token, 12, 3)
if token.str == ',' and token.astParent is None:
if token.scope.type in ('Class', 'Struct'):
# Is this initlist..
tok = token
while tok and tok.str == ',':
tok = tok.next
if tok and tok.next and tok.isName and tok.next.str == '(':
tok = tok.next.link.next
if tok.str == '{':
# This comma is used in initlist, do not warn
continue
prev = token.previous
while prev:
if prev.str == ';':
self.reportError(token, 12, 3)
break
elif prev.str in ')}]':
prev = prev.link
elif prev.str in '({[':
break
prev = prev.previous
def misra_12_4(self, cfg):
for expr in cfg.tokenlist:
if not expr.astOperand2 or not expr.astOperand1:
continue
if expr.valueType is None:
continue
if expr.valueType.sign is None or expr.valueType.sign != 'unsigned':
continue
if expr.valueType.pointer > 0:
continue
if not expr.valueType.isIntegral():
continue
op1 = expr.astOperand1.getKnownIntValue()
if op1 is None:
continue
op2 = expr.astOperand2.getKnownIntValue()
if op2 is None:
continue
bits = bitsOfEssentialType('unsigned ' + expr.valueType.type)
if bits <= 0 or bits >= 64:
continue
max_value = (1 << bits) - 1
if not is_constant_integer_expression(expr):
continue
if expr.str == '+' and op1 + op2 > max_value:
self.reportError(expr, 12, 4)
elif expr.str == '-' and op1 - op2 < 0:
self.reportError(expr, 12, 4)
elif expr.str == '*' and op1 * op2 > max_value:
self.reportError(expr, 12, 4)
def misra_13_1(self, data):
for token in data.tokenlist:
if simpleMatch(token, ") {") and token.next.astParent == token.link:
pass
elif not simpleMatch(token, '= {'):
continue
init = token.next
end = init.link
if not end:
continue # syntax is broken
tn = init
while tn and tn != end:
if tn.str == '[' and tn.link:
tn = tn.link
if tn and tn.next and tn.next.str == '=':
tn = tn.next.next
continue
else:
break
if tn.str == '.' and tn.next and tn.next.isName:
tn = tn.next
if tn.next and tn.next.str == '=':
tn = tn.next.next
continue
if tn.str in {'++', '--'} or tn.isAssignmentOp:
self.reportError(init, 13, 1)
tn = tn.next
def misra_13_3(self, data):
for token in data.tokenlist:
if token.str not in ('++', '--'):
continue
astTop = token
while astTop.astParent and astTop.astParent.str not in (',', ';'):
astTop = astTop.astParent
if countSideEffects(astTop) >= 2:
self.reportError(astTop, 13, 3)
def misra_13_4(self, data):
for token in data.tokenlist:
if token.str != '=':
continue
if not token.astParent:
continue
if (token.astOperand1 is None) or (token.astOperand2 is None):
continue
if token.astOperand1.str == '[' and token.astOperand1.previous.str in ('{', ','):
continue
if not (token.astParent.str in [',', ';', '{']):
self.reportError(token, 13, 4)
def misra_13_5(self, data):
for token in data.tokenlist:
if token.isLogicalOp and countSideEffectsRecursive(token.astOperand2) > 0:
self.reportError(token, 13, 5)
def misra_13_6(self, data):
for token in data.tokenlist:
if token.str == 'sizeof' and countSideEffectsRecursive(token.next) > 0:
self.reportError(token, 13, 6)
def misra_14_1(self, data):
for token in data.tokenlist:
if token.str == 'for':
exprs = getForLoopExpressions(token)
if not exprs:
continue
for counter in findCounterTokens(exprs[1]):
if counter.valueType and counter.valueType.isFloat():
self.reportError(token, 14, 1)
elif token.str == 'while':
if isFloatCounterInWhileLoop(token):
self.reportError(token, 14, 1)
def misra_14_2(self, data):
for token in data.tokenlist:
if token.str == 'for':
expressions = getForLoopExpressions(token)
if not expressions:
continue
if expressions[0] and not expressions[0].isAssignmentOp:
if expressions[0].str != "(" or not expressions[0].previous.isName:
self.reportError(token, 14, 2)
if countSideEffectsRecursive(expressions[1]) > 0:
self.reportError(token, 14, 2)
if countSideEffectsRecursive(expressions[2]) > 1:
self.reportError(token, 14, 2)
counter_vars_first_clause, counter_vars_exit_modified = getForLoopCounterVariables(token, data)
if len(counter_vars_exit_modified) == 0:
# if it's not possible to identify a loop counter, all 3 clauses must be empty
for idx in range(len(expressions)):
if expressions[idx]:
self.reportError(token, 14, 2)
break
elif len(counter_vars_exit_modified) > 1:
# there shall be a single loop counter
self.reportError(token, 14, 2)
else: # len(counter_vars_exit_modified) == 1:
loop_counter = counter_vars_exit_modified.pop()
# if the first clause is not empty, then it shall (declare and) initialize the loop counter
if expressions[0] is not None and loop_counter not in counter_vars_first_clause:
self.reportError(token, 14, 2)
# Inspect modification of loop counter in loop body
body_scope = token.next.link.next.scope
if not body_scope:
continue
tn = body_scope.bodyStart
while tn and tn != body_scope.bodyEnd:
if tn.variable == loop_counter:
if tn.next:
# TODO: Check modifications in function calls
if countSideEffectsRecursive(tn.next) > 0:
self.reportError(tn, 14, 2)
tn = tn.next
def misra_14_4(self, data):
for token in data.tokenlist:
if token.str != '(':
continue
if not token.astOperand1 or not (token.astOperand1.str in ['if', 'while']):
continue
if isBoolExpression(token.astOperand2):
continue
if token.astOperand2.valueType:
self.reportError(token, 14, 4)
def misra_15_1(self, data):
for token in data.tokenlist:
if token.str == "goto":
self.reportError(token, 15, 1)
def misra_15_2(self, data):
for token in data.tokenlist:
if token.str != 'goto':
continue
if (not token.next) or (not token.next.isName):
continue
if not findGotoLabel(token):
self.reportError(token, 15, 2)
def misra_15_3(self, data):
for token in data.tokenlist:
if token.str != 'goto':
continue
if (not token.next) or (not token.next.isName):
continue
tok = findGotoLabel(token)
if not tok:
continue
scope = token.scope
while scope and scope != tok.scope:
scope = scope.nestedIn
if not scope:
self.reportError(token, 15, 3)
# Jump crosses from one switch-clause to another is non-compliant
elif scope.type == 'Switch':
# Search for start of a current case block
tcase_start = token
while tcase_start and tcase_start.str not in ('case', 'default'):
tcase_start = tcase_start.previous
# Make sure that goto label doesn't occurs in the other
# switch-clauses
if tcase_start:
t = scope.bodyStart
in_this_case = False
while t and t != scope.bodyEnd:
if t == tcase_start:
in_this_case = True
if in_this_case and t.str not in ('case', 'default'):
in_this_case = False
if t == tok and not in_this_case:
self.reportError(token, 15, 3)
break
t = t.next
def misra_15_4(self, data):
# Return a list of scopes affected by a break or goto
def getLoopsAffectedByBreak(knownLoops, scope, isGoto):
if scope and scope.type and scope.type not in ['Global', 'Function']:
if not isGoto and scope.type == 'Switch':
return
if scope.type in ['For', 'While', 'Do']:
knownLoops.append(scope)
if not isGoto:
return
getLoopsAffectedByBreak(knownLoops, scope.nestedIn, isGoto)
loopWithBreaks = {}
for token in data.tokenlist:
if token.str not in ['break', 'goto']:
continue
affectedLoopScopes = []
getLoopsAffectedByBreak(affectedLoopScopes, token.scope, token.str == 'goto')
for scope in affectedLoopScopes:
if scope in loopWithBreaks:
loopWithBreaks[scope] += 1
else:
loopWithBreaks[scope] = 1
for scope, breakCount in loopWithBreaks.items():
if breakCount > 1:
self.reportError(scope.bodyStart, 15, 4)
def misra_15_5(self, data):
for token in data.tokenlist:
if token.str == 'return' and token.scope.type != 'Function':
self.reportError(token, 15, 5)
def misra_15_6(self, rawTokens):
state = 0
indent = 0
tok1 = None
def tokAt(tok,i):
while i < 0 and tok:
tok = tok.previous
if tok.str.startswith('//') or tok.str.startswith('/*'):
continue
i += 1
while i > 0 and tok:
tok = tok.next
if tok.str.startswith('//') or tok.str.startswith('/*'):
continue
i -= 1
return tok
def strtokens(tok, i1, i2):
tok1 = tokAt(tok, i1)
tok2 = tokAt(tok, i2)
tok = tok1
s = ''
while tok != tok2:
if tok.str.startswith('//') or tok.str.startswith('/*'):
tok = tok.next
continue
s += ' ' + tok.str
tok = tok.next
s += ' ' + tok.str
return s[1:]
for token in rawTokens:
if token.str in ['if', 'for', 'while']:
if strtokens(token,-1,0) == '# if':
continue
if strtokens(token,-1,0) == "} while":
# is there a 'do { .. } while'?
start = rawlink(tokAt(token,-1))
if start and strtokens(start, -1, 0) == 'do {':
continue
if state == 2:
self.reportError(tok1, 15, 6)
state = 1
indent = 0
tok1 = token
elif token.str == 'else':
if strtokens(token,-1,0) == '# else':
continue
if strtokens(token,0,1) == 'else if':
continue
if state == 2:
self.reportError(tok1, 15, 6)
state = 2
indent = 0
tok1 = token
elif state == 1:
if indent == 0 and token.str != '(':
state = 0
continue
if token.str == '(':
indent = indent + 1
elif token.str == ')':
if indent == 0:
state = 0
elif indent == 1:
state = 2
indent = indent - 1
elif state == 2:
if token.str.startswith('//') or token.str.startswith('/*'):
continue
state = 0
if token.str not in ('{', '#'):
self.reportError(tok1, 15, 6)
def misra_15_7(self, data):
for scope in data.scopes:
if scope.type != 'Else':
continue
if not simpleMatch(scope.bodyStart, '{ if ('):
continue
if scope.bodyStart.column > 0:
continue
tok = scope.bodyStart.next.next.link
if not simpleMatch(tok, ') {'):
continue
tok = tok.next.link
if not simpleMatch(tok, '} else'):
self.reportError(tok, 15, 7)
def misra_16_1(self, cfg):
for scope in cfg.scopes:
if scope.type != 'Switch':
continue
in_case_or_default = False
tok = scope.bodyStart.next
while tok != scope.bodyEnd:
if not in_case_or_default:
if tok.str not in ('case', 'default'):
self.reportError(tok, 16, 1)
else:
in_case_or_default = True
else:
if simpleMatch(tok, 'break ;'):
in_case_or_default = False
tok = tok.next
if tok.str == '{':
tok = tok.link
if tok.scope.type == 'Unconditional' and simpleMatch(tok.previous.previous, 'break ;'):
in_case_or_default = False
tok = tok.next
def misra_16_2(self, data):
for token in data.tokenlist:
if token.str == 'case' and token.scope.type != 'Switch':
self.reportError(token, 16, 2)
def misra_16_3(self, rawTokens):
STATE_NONE = 0 # default state, not in switch case/default block
STATE_BREAK = 1 # break/comment is seen but not its ';'
STATE_OK = 2 # a case/default is allowed (we have seen 'break;'/'comment'/'{'/attribute)
STATE_SWITCH = 3 # walking through switch statement scope
define = None
state = STATE_NONE
end_switch_token = None # end '}' for the switch scope
for token in rawTokens:
if simpleMatch(token, '# define'):
define = token
if define:
if token.linenr != define.linenr:
define = None
else:
continue
# Find switch scope borders
if token.str == 'switch':
state = STATE_SWITCH
if state == STATE_SWITCH:
if token.str == '{':
end_switch_token = findRawLink(token)
else:
continue
if token.str == 'break' or token.str == 'return' or token.str == 'throw':
state = STATE_BREAK
elif token.str == ';':
if state == STATE_BREAK:
state = STATE_OK
elif token.next and token.next == end_switch_token:
self.reportError(token.next, 16, 3)
else:
state = STATE_NONE
elif token.str.startswith('/*') or token.str.startswith('//'):
if 'fallthrough' in token.str.lower():
state = STATE_OK
elif simpleMatch(token, '[ [ fallthrough ] ] ;'):
state = STATE_BREAK
elif token.str == '{':
state = STATE_OK
elif token.str == '}' and state == STATE_OK:
# is this {} an unconditional block of code?
prev = findRawLink(token)
if prev:
prev = prev.previous
while prev and prev.str[:2] in ('//', '/*'):
prev = prev.previous
if (prev is None) or (prev.str not in ':;{}'):
state = STATE_NONE
elif token.str == 'case' or token.str == 'default':
if state != STATE_OK:
self.reportError(token, 16, 3)
state = STATE_OK
def misra_16_4(self, data):
for token in data.tokenlist:
if token.str != 'switch':
continue
if not simpleMatch(token, 'switch ('):
continue
if not simpleMatch(token.next.link, ') {'):
continue
startTok = token.next.link.next
tok = startTok.next
while tok and tok.str != '}':
if tok.str == '{':
tok = tok.link
elif tok.str == 'default':
break
tok = tok.next
if tok and tok.str != 'default':
self.reportError(token, 16, 4)
def misra_16_5(self, data):
for token in data.tokenlist:
if token.str != 'default':
continue
if token.previous and token.previous.str == '{':
continue
tok2 = token
while tok2:
if tok2.str in ('}', 'case'):
break
if tok2.str == '{':
tok2 = tok2.link
tok2 = tok2.next
if tok2 and tok2.str == 'case':
self.reportError(token, 16, 5)
def misra_16_6(self, data):
for token in data.tokenlist:
if not (simpleMatch(token, 'switch (') and simpleMatch(token.next.link, ') {')):
continue
tok = token.next.link.next.next
count = 0
while tok:
if tok.str in ['break', 'return', 'throw']:
count = count + 1
elif tok.str == '{':
tok = tok.link
if isNoReturnScope(tok):
count = count + 1
elif tok.str == '}':
break
tok = tok.next
if count < 2:
self.reportError(token, 16, 6)
def misra_16_7(self, data):
for token in data.tokenlist:
if simpleMatch(token, 'switch (') and isBoolExpression(token.next.astOperand2):
self.reportError(token, 16, 7)
def misra_17_1(self, data):
for token in data.tokenlist:
if isFunctionCall(token) and token.astOperand1.str in (
'va_list', 'va_arg', 'va_start', 'va_end', 'va_copy'):
self.reportError(token, 17, 1)
elif token.str == 'va_list':
self.reportError(token, 17, 1)
def misra_17_2(self, data):
# find recursions..
def find_recursive_call(search_for_function, direct_call, calls_map, visited=None):
if visited is None:
visited = set()
if direct_call == search_for_function:
return True
for indirect_call in calls_map.get(direct_call, []):
if indirect_call == search_for_function:
return True
if indirect_call in visited:
# This has already been handled
continue
visited.add(indirect_call)
if find_recursive_call(search_for_function, indirect_call, calls_map, visited):
return True
return False
# List functions called in each function
function_calls = {}
for scope in data.scopes:
if scope.type != 'Function':
continue
calls = []
tok = scope.bodyStart
while tok != scope.bodyEnd:
tok = tok.next
if not isFunctionCall(tok, data.standards.c):
continue
f = tok.astOperand1.function
if f is not None and f not in calls:
calls.append(f)
function_calls[scope.function] = calls
# Report warnings for all recursions..
for func in function_calls:
for call in function_calls[func]:
if not find_recursive_call(func, call, function_calls):
# Function call is not recursive
continue
# Warn about all functions calls..
for scope in data.scopes:
if scope.type != 'Function' or scope.function != func:
continue
tok = scope.bodyStart
while tok != scope.bodyEnd:
if tok.function and tok.function == call:
self.reportError(tok, 17, 2)
tok = tok.next
def misra_17_3(self, cfg):
for w in cfg.clang_warnings:
if w['message'].endswith('[-Wimplicit-function-declaration]'):
self.reportError(cppcheckdata.Location(w), 17, 3)
for token in cfg.tokenlist:
if token.str not in ["while", "if"]:
continue
if token.next.str != "(":
continue
tok = token.next
end_token = token.next.link
while tok != end_token:
if tok.isName and tok.function is None and tok.valueType is None and tok.next.str == "(" and \
tok.next.valueType is None and not isKeyword(tok.str) and not isStdLibId(tok.str):
self.reportError(tok, 17, 3)
break
tok = tok.next
def misra_config(self, data):
for var in data.variables:
if not var.isArray or var.nameToken is None or not cppcheckdata.simpleMatch(var.nameToken.next, '['):
continue
tok = var.nameToken.next
while tok.str == '[':
sz = tok.astOperand2
if sz and sz.getKnownIntValue() is None:
has_var = False
unknown_constant = False
tokens = [sz]
while len(tokens) > 0:
t = tokens[-1]
tokens = tokens[:-1]
if t:
if t.isName and t.getKnownIntValue() is None:
if t.varId or t.variable:
has_var = True
continue
unknown_constant = True
self.report_config_error(tok, 'Unknown constant {}, please review configuration'.format(t.str))
if t.isArithmeticalOp:
tokens += [t.astOperand1, t.astOperand2]
if not unknown_constant and not has_var:
self.report_config_error(tok, 'Unknown array size, please review configuration')
tok = tok.link.next
for token in data.tokenlist:
if token.str not in ("while", "if"):
continue
tok = token.next
if token is None or tok.str != "(":
continue
end_token = tok.link
while tok != end_token:
tok = tok.next
if tok.str == "(" and tok.isCast:
tok = tok.link
continue
if not tok.isName:
continue
if tok.function or tok.variable or tok.varId or tok.valueType:
continue
if tok.next.str == "(" or tok.str in ["EOF"]:
continue
if isKeyword(tok.str) or isStdLibId(tok.str):
continue
if tok.astParent is None:
continue
if tok.astParent.str == "." and tok.astParent.valueType:
continue
self.report_config_error(tok, "Variable '%s' is unknown" % tok.str)
def misra_17_6(self, rawTokens):
for token in rawTokens:
if simpleMatch(token, '[ static'):
self.reportError(token, 17, 6)
def misra_17_7(self, data):
for token in data.tokenlist:
if not token.scope.isExecutable:
continue
if token.str != '(' or token.astParent:
continue
if not token.astOperand1 or not token.astOperand1.isName:
continue
if token.astOperand1.varId and get_function_pointer_type(token.astOperand1.variable.typeStartToken) is None:
continue
if token.valueType is None:
continue
if token.valueType.type == 'void' and token.valueType.pointer == 0:
continue
self.reportError(token, 17, 7)
def misra_17_8(self, data):
for token in data.tokenlist:
if not (token.isAssignmentOp or (token.str in ('++', '--'))):
continue
if not token.astOperand1:
continue
var = token.astOperand1.variable
if var and var.isArgument:
self.reportError(token, 17, 8)
def misra_18_4(self, data):
for token in data.tokenlist:
if token.str not in ('+', '-', '+=', '-='):
continue
if token.astOperand1 is None or token.astOperand2 is None:
continue
vt1 = token.astOperand1.valueType
vt2 = token.astOperand2.valueType
if vt1 and vt1.pointer > 0:
self.reportError(token, 18, 4)
elif vt2 and vt2.pointer > 0:
self.reportError(token, 18, 4)
def misra_18_5(self, data):
for var in data.variables:
if not var.isPointer:
continue
typetok = var.nameToken
count = 0
while typetok:
if typetok.str == '*':
count = count + 1
elif not typetok.isName:
break
typetok = typetok.previous
if count > 2:
self.reportError(var.nameToken, 18, 5)
def misra_18_7(self, data):
for scope in data.scopes:
if scope.type != 'Struct':
continue
token = scope.bodyStart.next
while token != scope.bodyEnd and token is not None:
# Handle nested structures to not duplicate an error.
if token.str == '{':
token = token.link
# skip function pointer parameter types
if token.astOperand1 is None:
pass
elif cppcheckdata.simpleMatch(token, "[ ]"):
self.reportError(token, 18, 7)
break
token = token.next
def misra_18_8(self, data):
for var in data.variables:
if not var.isArray or not var.isLocal:
continue
# TODO Array dimensions are not available in dump, must look in tokens
typetok = var.nameToken.next
if not typetok or typetok.str != '[':
continue
# Unknown define or syntax error
if not typetok.astOperand2:
continue
if not isConstantExpression(typetok.astOperand2) and not isUnknownConstantExpression(typetok.astOperand2):
self.reportError(var.nameToken, 18, 8)
def misra_19_2(self, data):
for token in data.tokenlist:
if token.str == 'union':
self.reportError(token, 19, 2)
def misra_20_1(self, data):
token_in_file = {}
for token in data.tokenlist:
if token.file not in token_in_file:
token_in_file[token.file] = int(token.linenr)
else:
token_in_file[token.file] = min(token_in_file[token.file], int(token.linenr))
for directive in data.directives:
if not directive.str.startswith('#include'):
continue
if directive.file not in token_in_file:
continue
if token_in_file[directive.file] < int(directive.linenr):
self.reportError(directive, 20, 1)
def misra_20_2(self, data):
for directive in data.directives:
if not directive.str.startswith('#include '):
continue
for pattern in ('\\', '//', '/*', ',', "'"):
if pattern in directive.str:
self.reportError(directive, 20, 2)
break
def misra_20_3(self, data):
for directive in data.directives:
if not directive.str.startswith('#include '):
continue
words = directive.str.split(' ')
# If include directive contains more than two words, here would be
# violation anyway.
if len(words) > 2:
self.reportError(directive, 20, 3)
# Handle include directives with not quoted argument
elif len(words) > 1:
filename = words[1]
if not ((filename.startswith('"') and
filename.endswith('"')) or
(filename.startswith('<') and
filename.endswith('>'))):
# We are handle only directly included files in the
# following format: #include file.h
# Cases with macro expansion provided by MISRA document are
# skipped because we don't always have access to directive
# definition.
if '.' in filename:
self.reportError(directive, 20, 3)
def misra_20_4(self, data):
for directive in data.directives:
res = re.search(r'#define ([a-z][a-z0-9_]+)', directive.str)
if res and isKeyword(res.group(1), data.standards.c):
self.reportError(directive, 20, 4)
def misra_20_5(self, data):
for directive in data.directives:
if directive.str.startswith('#undef '):
self.reportError(directive, 20, 5)
def misra_20_7(self, data):
def find_string_concat(exp, arg, directive_args):
# Handle concatenation of string literals, e.g.:
# #define MACRO(A, B) (A " " B)
# Addon should not report errors for both macro arguments.
arg_pos = exp.find(arg, 0)
need_check = False
skip_next = False
state_in_string = False
pos_search = arg_pos + 1
directive_args = [a.strip() for a in directive_args if a != arg]
arg = arg.strip()
while pos_search < len(exp):
if exp[pos_search] == '"':
if state_in_string:
state_in_string = False
else:
state_in_string = True
pos_search += 1
elif exp[pos_search].isalnum():
word = ""
while pos_search < len(exp) and exp[pos_search].isalnum():
word += exp[pos_search]
pos_search += 1
if word == arg:
pos_search += 1
elif word in directive_args:
skip_next = True
break
elif exp[pos_search] == ' ':
pos_search += 1
elif state_in_string:
pos_search += 1
else:
need_check = True
break
return need_check, skip_next
for directive in data.directives:
d = Define(directive)
exp = '(' + d.expansionList + ')'
skip_next = False
for arg in d.args:
if skip_next:
_, skip_next = find_string_concat(exp, arg, d.args)
continue
need_check, skip_next = find_string_concat(exp, arg, d.args)
if not need_check:
continue
pos = 0
while pos < len(exp):
pos = exp.find(arg, pos)
if pos < 0:
break
# is 'arg' used at position pos
pos1 = pos - 1
pos2 = pos + len(arg)
pos = pos2
if pos1 >= 0 and (isalnum(exp[pos1]) or exp[pos1] == '_'):
continue
if pos2 < len(exp) and (isalnum(exp[pos2]) or exp[pos2] == '_'):
continue
while pos1 >= 0 and exp[pos1] == ' ':
pos1 -= 1
if exp[pos1] == '#':
continue
if exp[pos1] not in '([,.':
self.reportError(directive, 20, 7)
break
while pos2 < len(exp) and exp[pos2] == ' ':
pos2 += 1
if pos2 < len(exp) and exp[pos2] not in ')]#,':
self.reportError(directive, 20, 7)
break
def misra_20_8(self, cfg):
for cond in cfg.preprocessor_if_conditions:
#print(cond)
if cond.result and cond.result not in (0,1):
self.reportError(cond, 20, 8)
def misra_20_9(self, cfg):
for cond in cfg.preprocessor_if_conditions:
if cond.E is None:
continue
defined = []
for directive in cfg.directives:
if directive.file == cond.file and directive.linenr == cond.linenr:
for name in re.findall(r'[^_a-zA-Z0-9]defined[ ]*\([ ]*([_a-zA-Z0-9]+)[ ]*\)', directive.str):
defined.append(name)
for name in re.findall(r'[^_a-zA-Z0-9]defined[ ]*([_a-zA-Z0-9]+)', directive.str):
defined.append(name)
break
for s in cond.E.split(' '):
if (s[0] >= 'A' and s[0] <= 'Z') or (s[0] >= 'a' and s[0] <= 'z'):
if isKeyword(s):
continue
if s in defined:
continue
self.reportError(cond, 20, 9)
def misra_20_10(self, data):
for directive in data.directives:
d = Define(directive)
if d.expansionList.find('#') >= 0:
self.reportError(directive, 20, 10)
def misra_20_11(self, cfg):
for directive in cfg.directives:
d = Define(directive)
for arg in d.args:
res = re.search(r'[^#]#[ ]*%s[ ]*##' % arg, ' ' + d.expansionList)
if res:
self.reportError(directive, 20, 11)
def misra_20_12(self, cfg):
def _is_hash_hash_op(expansion_list, arg):
return re.search(r'##[ ]*%s[^a-zA-Z0-9_]' % arg, expansion_list) or \
re.search(r'[^a-zA-Z0-9_]%s[ ]*##' % arg, expansion_list)
def _is_other_op(expansion_list, arg):
pos = expansion_list.find(arg)
while pos >= 0:
pos1 = pos - 1
pos2 = pos + len(arg)
pos = expansion_list.find(arg, pos2)
if isalnum(expansion_list[pos1]) or expansion_list[pos1] == '_':
continue
if isalnum(expansion_list[pos2]) or expansion_list[pos2] == '_':
continue
while expansion_list[pos1] == ' ':
pos1 = pos1 - 1
if expansion_list[pos1] == '#':
continue
while expansion_list[pos2] == ' ':
pos2 = pos2 + 1
if expansion_list[pos2] == '#':
continue
return True
return False
def _is_arg_macro_usage(directive, arg):
for macro_usage in cfg.macro_usage:
if macro_usage.file == directive.file and macro_usage.linenr == directive.linenr:
for macro_usage_arg in cfg.macro_usage:
if macro_usage_arg == macro_usage:
continue
if (macro_usage.usefile == macro_usage_arg.usefile and
macro_usage.uselinenr == macro_usage_arg.uselinenr and
macro_usage.usecolumn == macro_usage_arg.usecolumn):
# TODO: check arg better
return True
return False
for directive in cfg.directives:
define = Define(directive)
expansion_list = '(%s)' % define.expansionList
for arg in define.args:
if not _is_hash_hash_op(expansion_list, arg):
continue
if not _is_other_op(expansion_list, arg):
continue
if _is_arg_macro_usage(directive, arg):
self.reportError(directive, 20, 12)
break
def misra_20_13(self, data):
dir_pattern = re.compile(r'#[ ]*([^ (<]*)')
for directive in data.directives:
dir = directive.str
mo = dir_pattern.match(dir)
if mo:
dir = mo.group(1)
if dir not in ['define', 'elif', 'else', 'endif', 'error', 'if', 'ifdef', 'ifndef', 'include',
'pragma', 'undef', 'warning']:
self.reportError(directive, 20, 13)
def misra_20_14(self, data):
# stack for #if blocks. contains the #if directive until the corresponding #endif is seen.
# the size increases when there are inner #if directives.
ifStack = []
for directive in data.directives:
if directive.str.startswith('#if ') or directive.str.startswith('#ifdef ') or directive.str.startswith(
'#ifndef '):
ifStack.append(directive)
elif directive.str == '#else' or directive.str.startswith('#elif '):
if len(ifStack) == 0:
self.reportError(directive, 20, 14)
ifStack.append(directive)
elif directive.file != ifStack[-1].file:
self.reportError(directive, 20, 14)
elif directive.str == '#endif':
if len(ifStack) == 0:
self.reportError(directive, 20, 14)
elif directive.file != ifStack[-1].file:
self.reportError(directive, 20, 14)
ifStack.pop()
def misra_21_1(self, data):
re_forbidden_macro = re.compile(r'#(?:define|undef) _[_A-Z]+')
re_macro_name = re.compile(r'#(?:define|undef) (.+)[ $]')
for d in data.directives:
# Search for forbidden identifiers
m = re.search(re_forbidden_macro, d.str)
if m:
self.reportError(d, 21, 1)
continue
# Search standard library identifiers in macro names
m = re.search(re_macro_name, d.str)
if not m:
continue
name = m.group(1)
if isStdLibId(name, data.standards.c):
self.reportError(d, 21, 1)
def misra_21_2(self, cfg):
for directive in cfg.directives:
define = Define(directive)
if re.match(r'_+BUILTIN_.*', define.name.upper()):
self.reportError(directive, 21, 2)
for func in cfg.functions:
if isStdLibId(func.name, cfg.standards.c):
tok = func.tokenDef if func.tokenDef else func.token
self.reportError(tok, 21, 2)
def misra_21_3(self, data):
for token in data.tokenlist:
if isFunctionCall(token) and (token.astOperand1.str in ('malloc', 'calloc', 'realloc', 'free')):
self.reportError(token, 21, 3)
def misra_21_4(self, data):
directive = findInclude(data.directives, '<setjmp.h>')
if directive:
self.reportError(directive, 21, 4)
def misra_21_5(self, data):
directive = findInclude(data.directives, '<signal.h>')
if directive:
self.reportError(directive, 21, 5)
def misra_21_6(self, data):
dir_stdio = findInclude(data.directives, '<stdio.h>')
dir_wchar = findInclude(data.directives, '<wchar.h>')
if dir_stdio:
self.reportError(dir_stdio, 21, 6)
if dir_wchar:
self.reportError(dir_wchar, 21, 6)
def misra_21_7(self, data):
for token in data.tokenlist:
if isFunctionCall(token) and (token.astOperand1.str in ('atof', 'atoi', 'atol', 'atoll')):
self.reportError(token, 21, 7)
def misra_21_8(self, data):
for token in data.tokenlist:
if isFunctionCall(token) and (token.astOperand1.str in ('abort', 'exit', 'getenv')):
self.reportError(token, 21, 8)
def misra_21_9(self, data):
for token in data.tokenlist:
if (token.str in ('bsearch', 'qsort')) and token.next and token.next.str == '(':
self.reportError(token, 21, 9)
def misra_21_10(self, data):
directive = findInclude(data.directives, '<time.h>')
if directive:
self.reportError(directive, 21, 10)
for token in data.tokenlist:
if (token.str == 'wcsftime') and token.next and token.next.str == '(':
self.reportError(token, 21, 10)
def misra_21_11(self, data):
directive = findInclude(data.directives, '<tgmath.h>')
if directive:
self.reportError(directive, 21, 11)
def misra_21_12(self, data):
if findInclude(data.directives, '<fenv.h>'):
for token in data.tokenlist:
if token.str == 'fexcept_t' and token.isName:
self.reportError(token, 21, 12)
if isFunctionCall(token) and (token.astOperand1.str in (
'feclearexcept',
'fegetexceptflag',
'feraiseexcept',
'fesetexceptflag',
'fetestexcept')):
self.reportError(token, 21, 12)
def misra_21_14(self, data):
# buffers used in strcpy/strlen/etc function calls
string_buffers = []
for token in data.tokenlist:
if token.str[0] == 's' and isFunctionCall(token.next):
name, args = cppcheckdata.get_function_call_name_args(token)
if name is None:
continue
def _get_string_buffers(match, args, argnum):
if not match:
return []
ret = []
for a in argnum:
if a < len(args):
arg = args[a]
while arg and arg.str in ('.', '::'):
arg = arg.astOperand2
if arg and arg.varId != 0 and arg.varId not in ret:
ret.append(arg.varId)
return ret
string_buffers += _get_string_buffers(name == 'strcpy', args, [0, 1])
string_buffers += _get_string_buffers(name == 'strncpy', args, [0, 1])
string_buffers += _get_string_buffers(name == 'strlen', args, [0])
string_buffers += _get_string_buffers(name == 'strcmp', args, [0, 1])
string_buffers += _get_string_buffers(name == 'sprintf', args, [0])
string_buffers += _get_string_buffers(name == 'snprintf', args, [0, 3])
for token in data.tokenlist:
if token.str != 'memcmp':
continue
name, args = cppcheckdata.get_function_call_name_args(token)
if name is None:
continue
if len(args) != 3:
continue
for arg in args[:2]:
if arg.str[-1] == '\"':
self.reportError(arg, 21, 14)
continue
while arg and arg.str in ('.', '::'):
arg = arg.astOperand2
if arg and arg.varId and arg.varId in string_buffers:
self.reportError(arg, 21, 14)
def misra_21_15(self, data):
for token in data.tokenlist:
if token.str not in ('memcpy', 'memmove', 'memcmp'):
continue
name, args = cppcheckdata.get_function_call_name_args(token)
if name is None:
continue
if len(args) != 3:
continue
if args[0].valueType is None or args[1].valueType is None:
continue
if args[0].valueType.type == args[1].valueType.type:
continue
if args[0].valueType.type == 'void' or args[1].valueType.type == 'void':
continue
self.reportError(token, 21, 15)
def misra_21_16(self, cfg):
for token in cfg.tokenlist:
if token.str != 'memcmp':
continue
name, args = cppcheckdata.get_function_call_name_args(token)
if name is None:
continue
if len(args) != 3:
continue
for arg in args[:2]:
if arg.valueType is None:
continue
if arg.valueType.pointer > 1:
continue
if arg.valueType.sign in ('unsigned', 'signed'):
continue
if arg.valueType.isEnum():
continue
self.reportError(token, 21, 16)
def misra_21_19(self, cfg):
for token in cfg.tokenlist:
if token.str in ('localeconv', 'getenv', 'setlocale', 'strerror') and simpleMatch(token.next, '('):
name, _ = cppcheckdata.get_function_call_name_args(token)
if name is None or name != token.str:
continue
parent = token.next
while simpleMatch(parent.astParent, '+'):
parent = parent.astParent
# x = f()
if simpleMatch(parent.astParent, '=') and parent == parent.astParent.astOperand2:
lhs = parent.astParent.astOperand1
if lhs and lhs.valueType and lhs.valueType.pointer > 0 and lhs.valueType.constness == 0:
self.reportError(token, 21, 19)
if token.str == '=':
lhs = token.astOperand1
while simpleMatch(lhs, '*') and lhs.astOperand2 is None:
lhs = lhs.astOperand1
if not simpleMatch(lhs, '.'):
continue
while simpleMatch(lhs, '.'):
lhs = lhs.astOperand1
if lhs and lhs.variable and simpleMatch(lhs.variable.typeStartToken, 'lconv'):
self.reportError(token, 21, 19)
def misra_21_20(self, cfg):
assigned = {}
invalid = []
for token in cfg.tokenlist:
# No sophisticated data flow analysis, bail out if control flow is "interrupted"
if token.str in ('{', '}', 'break', 'continue', 'return'):
assigned = {}
invalid = []
continue
# When pointer is assigned, remove it from 'assigned' and 'invalid'
if token.varId and token.varId > 0 and simpleMatch(token.next, '='):
for name in assigned.keys():
while token.varId in assigned[name]:
assigned[name].remove(token.varId)
while token.varId in invalid:
invalid.remove(token.varId)
continue
# Calling dangerous function
if token.str in ('asctime', 'ctime', 'gmtime', 'localtime', 'localeconv', 'getenv', 'setlocale', 'strerror'):
name, args = cppcheckdata.get_function_call_name_args(token)
if name and name == token.str:
# make assigned pointers invalid
for varId in assigned.get(name, ()):
if varId not in invalid:
invalid.append(varId)
# assign pointer
parent = token.next
while parent.astParent and (parent.astParent.str == '+' or isCast(parent.astParent)):
parent = parent.astParent
if simpleMatch(parent.astParent, '='):
eq = parent.astParent
vartok = eq.previous
if vartok and vartok.varId and vartok.varId > 0:
if name not in assigned:
assigned[name] = [vartok.varId]
elif vartok.varId not in assigned[name]:
assigned[name].append(vartok.varId)
continue
# taking value of invalid pointer..
if token.astParent and token.varId:
if token.varId in invalid:
self.reportError(token, 21, 20)
def misra_21_21(self, cfg):
for token in cfg.tokenlist:
if token.str == 'system':
name, args = cppcheckdata.get_function_call_name_args(token)
if name == 'system' and len(args) == 1:
self.reportError(token, 21, 21)
def misra_22_5(self, cfg):
for token in cfg.tokenlist:
if token.isUnaryOp("*") or (token.isBinaryOp() and token.str == '.'):
fileptr = token.astOperand1
if fileptr.variable and cppcheckdata.simpleMatch(fileptr.variable.typeStartToken, 'FILE *'):
self.reportError(token, 22, 5)
def misra_22_7(self, cfg):
for eofToken in cfg.tokenlist:
if eofToken.str != 'EOF':
continue
if eofToken.astParent is None or not eofToken.astParent.isComparisonOp:
continue
if eofToken.astParent.astOperand1 == eofToken:
eofTokenSibling = eofToken.astParent.astOperand2
else:
eofTokenSibling = eofToken.astParent.astOperand1
while isCast(eofTokenSibling) and eofTokenSibling.valueType and eofTokenSibling.valueType.type and eofTokenSibling.valueType.type == 'int':
eofTokenSibling = eofTokenSibling.astOperand2 if eofTokenSibling.astOperand2 else eofTokenSibling.astOperand1
if eofTokenSibling is not None and eofTokenSibling.valueType and eofTokenSibling.valueType and eofTokenSibling.valueType.type in ('bool', 'char', 'short'):
self.reportError(eofToken, 22, 7)
def misra_22_8(self, cfg):
is_zero = False
for token in cfg.tokenlist:
if simpleMatch(token, 'errno = 0'):
is_zero = True
if token.str == '(' and not simpleMatch(token.link, ') {'):
name, _ = cppcheckdata.get_function_call_name_args(token.previous)
if name is None:
continue
if is_errno_setting_function(name):
if not is_zero:
self.reportError(token, 22, 8)
else:
is_zero = False
def misra_22_9(self, cfg):
errno_is_set = False
for token in cfg.tokenlist:
if token.str == '(' and not simpleMatch(token.link, ') {'):
name, args = cppcheckdata.get_function_call_name_args(token.previous)
if name is None:
continue
errno_is_set = is_errno_setting_function(name)
if errno_is_set and token.str in '{};':
errno_is_set = False
tok = token.next
while tok and tok.str not in ('{','}',';','errno'):
tok = tok.next
if tok is None or tok.str != 'errno':
self.reportError(token, 22, 9)
elif (tok.astParent is None) or (not tok.astParent.isComparisonOp):
self.reportError(token, 22, 9)
def misra_22_10(self, cfg):
last_function_call = None
for token in cfg.tokenlist:
if token.isName and token.next.str == '(' and not simpleMatch(token.next.link, ') {'):
name, args = cppcheckdata.get_function_call_name_args(token)
last_function_call = name
if token.str == '}':
last_function_call = None
if token.str == 'errno' and token.astParent and token.astParent.isComparisonOp:
if last_function_call is None:
self.reportError(token, 22, 10)
elif not is_errno_setting_function(last_function_call):
self.reportError(token, 22, 10)
def get_verify_expected(self):
"""Return the list of expected violations in the verify test"""
return self.verify_expected
def get_verify_actual(self):
"""Return the list of actual violations in for the verify test"""
return self.verify_actual
def get_violations(self, violation_type=None):
"""Return the list of violations for a normal checker run"""
if violation_type is None:
return self.violations.items()
else:
return self.violations[violation_type]
def get_violation_types(self):
"""Return the list of violations for a normal checker run"""
return self.violations.keys()
def addSuppressedRule(self, ruleNum,
fileName=None,
lineNumber=None,
symbolName=None):
"""
Add a suppression to the suppressions data structure
Suppressions are stored in a dictionary of dictionaries that
contains a list of tuples.
The first dictionary is keyed by the MISRA rule in hundreds
format. The value of that dictionary is a dictionary of filenames.
If the value is None then the rule is assumed to be suppressed for
all files.
If the filename exists then the value of that dictionary contains a list
with the scope of the suppression. If the list contains an item of None
then the rule is assumed to be suppressed for the entire file. Otherwise
the list contains line number, symbol name tuples.
For each tuple either line number or symbol name can can be none.
"""
normalized_filename = None
if fileName is not None:
normalized_filename = os.path.expanduser(fileName)
normalized_filename = os.path.normpath(normalized_filename)
if lineNumber is not None or symbolName is not None:
line_symbol = (lineNumber, symbolName)
else:
line_symbol = None
# If the rule is not in the dict already then add it
if ruleNum not in self.suppressedRules:
ruleItemList = list()
ruleItemList.append(line_symbol)
fileDict = dict()
fileDict[normalized_filename] = ruleItemList
self.suppressedRules[ruleNum] = fileDict
# Rule is added. Done.
return
# Rule existed in the dictionary. Check for
# filename entries.
# Get the dictionary for the rule number
fileDict = self.suppressedRules[ruleNum]
# If the filename is not in the dict already add it
if normalized_filename not in fileDict:
ruleItemList = list()
ruleItemList.append(line_symbol)
fileDict[normalized_filename] = ruleItemList
# Rule is added with a file scope. Done
return
# Rule has a matching filename. Get the rule item list.
# Check the lists of rule items
# to see if this (lineNumber, symbolName) combination
# or None already exists.
ruleItemList = fileDict[normalized_filename]
if line_symbol is None:
# is it already in the list?
if line_symbol not in ruleItemList:
ruleItemList.append(line_symbol)
else:
# Check the list looking for matches
matched = False
for each in ruleItemList:
if each is not None:
if (each[0] == line_symbol[0]) and (each[1] == line_symbol[1]):
matched = True
# Append the rule item if it was not already found
if not matched:
ruleItemList.append(line_symbol)
def isRuleSuppressed(self, file_path, linenr, ruleNum):
"""
Check to see if a rule is suppressed.
:param ruleNum: is the rule number in hundreds format
:param file_path: File path of checked location
:param linenr: Line number of checked location
If the rule exists in the dict then check for a filename
If the filename is None then rule is suppressed globally
for all files.
If the filename exists then look for list of
line number, symbol name tuples. If the list is None then
the rule is suppressed for the entire file
If the list of tuples exists then search the list looking for
matching line numbers. Symbol names are currently ignored
because they can include regular expressions.
TODO: Support symbol names and expression matching.
"""
ruleIsSuppressed = False
# Remove any prefix listed in command arguments from the filename.
filename = None
if file_path is not None:
if self.filePrefix is not None:
filename = remove_file_prefix(file_path, self.filePrefix)
else:
filename = os.path.basename(file_path)
if ruleNum in self.suppressedRules:
fileDict = self.suppressedRules[ruleNum]
# a file name entry of None means that the rule is suppressed
# globally
if None in fileDict:
ruleIsSuppressed = True
else:
# Does the filename match one of the names in
# the file list
if filename in fileDict:
# Get the list of ruleItems
ruleItemList = fileDict[filename]
if None in ruleItemList:
# Entry of None in the ruleItemList means the rule is
# suppressed for all lines in the filename
ruleIsSuppressed = True
else:
# Iterate though the the list of line numbers
# and symbols looking for a match of the line
# number. Matching the symbol is a TODO:
for each in ruleItemList:
if each is not None:
if each[0] == linenr:
ruleIsSuppressed = True
return ruleIsSuppressed
def isRuleGloballySuppressed(self, rule_num):
"""
Check to see if a rule is globally suppressed.
:param rule_num: is the rule number in hundreds format
"""
if rule_num not in self.suppressedRules:
return False
return None in self.suppressedRules[rule_num]
def showSuppressedRules(self):
"""
Print out rules in suppression list sorted by Rule Number
"""
print("Suppressed Rules List:")
outlist = list()
for ruleNum in self.suppressedRules:
fileDict = self.suppressedRules[ruleNum]
for fname in fileDict:
ruleItemList = fileDict[fname]
for item in ruleItemList:
if item is None:
item_str = "None"
else:
item_str = str(item[0])
outlist.append("%s: %s: %s (%d locations suppressed)" % (
float(ruleNum) / 100, fname, item_str, self.suppressionStats.get(ruleNum, 0)))
for line in sorted(outlist, reverse=True):
print(" %s" % line)
def setFilePrefix(self, prefix):
"""
Set the file prefix to ignore from files when matching
suppression files
"""
self.filePrefix = prefix
def setSeverity(self, severity):
"""
Set the severity for all errors.
"""
self.severity = severity
def setSuppressionList(self, suppressionlist):
num1 = 0
num2 = 0
rule_pattern = re.compile(r'([0-9]+).([0-9]+)')
strlist = suppressionlist.split(",")
# build ignore list
for item in strlist:
res = rule_pattern.match(item)
if res:
num1 = int(res.group(1))
num2 = int(res.group(2))
ruleNum = (num1 * 100) + num2
self.addSuppressedRule(ruleNum)
def report_config_error(self, location, errmsg):
cppcheck_severity = 'error'
error_id = 'config'
if self.settings.verify:
self.verify_actual.append('%s:%d %s' % (location.file, location.linenr, error_id))
else:
cppcheckdata.reportError(location, cppcheck_severity, errmsg, 'misra', error_id)
def reportError(self, location, num1, num2):
ruleNum = num1 * 100 + num2
if self.isRuleGloballySuppressed(ruleNum):
return
if self.settings.verify:
self.verify_actual.append('%s:%d %d.%d' % (location.file, location.linenr, num1, num2))
elif self.isRuleSuppressed(location.file, location.linenr, ruleNum):
# Error is suppressed. Ignore
self.suppressionStats.setdefault(ruleNum, 0)
self.suppressionStats[ruleNum] += 1
return
else:
errorId = 'c2012-' + str(num1) + '.' + str(num2)
misra_severity = 'Undefined'
cppcheck_severity = 'style'
if ruleNum in self.ruleTexts:
errmsg = self.ruleTexts[ruleNum].text
if self.ruleTexts[ruleNum].misra_severity:
misra_severity = self.ruleTexts[ruleNum].misra_severity
cppcheck_severity = self.ruleTexts[ruleNum].cppcheck_severity
elif len(self.ruleTexts) == 0:
if self.ruleText_filename is None:
errmsg = 'misra violation (use --rule-texts=<file> to get proper output)'
else:
errmsg = 'misra violation (rule-texts-file not found: ' + self.ruleText_filename + ')'
if self.path_premium_addon:
for line in cppcheckdata.cmd_output([self.path_premium_addon, '--cli', '--get-rule-text=' + errorId]).split('\n'):
if len(line) > 1 and not line.startswith('{'):
errmsg = line.strip()
break
else:
errmsg = 'misra violation %s with no text in the supplied rule-texts-file' % (ruleNum)
if self.severity:
cppcheck_severity = self.severity
this_violation = '{}-{}-{}-{}'.format(location.file, location.linenr, location.column, ruleNum)
# If this is new violation then record it and show it. If not then
# skip it since it has already been displayed.
if this_violation not in self.existing_violations:
self.existing_violations.add(this_violation)
cppcheckdata.reportError(location, cppcheck_severity, errmsg, 'misra', errorId, misra_severity)
if misra_severity not in self.violations:
self.violations[misra_severity] = []
self.violations[misra_severity].append('misra-' + errorId)
def loadRuleTexts(self, filename):
num1 = 0
num2 = 0
appendixA = False
ruleText = False
expect_more = False
Rule_pattern = re.compile(r'^Rule ([0-9]+).([0-9]+)')
severity_pattern = re.compile(r'.*[ ]*(Advisory|Required|Mandatory)$')
xA_Z_pattern = re.compile(r'^[#A-Z].*')
a_z_pattern = re.compile(r'^[a-z].*')
# Try to detect the file encoding
file_stream = None
encodings = ['ascii', 'utf-8', 'windows-1250', 'windows-1252']
for e in encodings:
try:
file_stream = codecs.open(filename, 'r', encoding=e)
file_stream.readlines()
file_stream.seek(0)
except UnicodeDecodeError:
file_stream.close()
file_stream = None
else:
break
if not file_stream:
print('Could not find a suitable codec for "' + filename + '".')
print('If you know the codec please report it to the developers so the list can be enhanced.')
print('Trying with default codec now and ignoring errors if possible ...')
try:
file_stream = open(filename, 'rt', errors='ignore')
except TypeError:
# Python 2 does not support the errors parameter
file_stream = open(filename, 'rt')
rule = None
have_severity = False
severity_loc = 0
for line in file_stream:
line = line.replace('\r', '').replace('\n', '')
if not appendixA:
if line.find('Appendix A') >= 0 and line.find('Summary of guidelines') >= 10:
appendixA = True
continue
if line.find('Appendix B') >= 0:
break
if len(line) == 0:
continue
# Parse rule declaration.
res = Rule_pattern.match(line)
if res:
have_severity = False
expect_more = False
severity_loc = 0
num1 = int(res.group(1))
num2 = int(res.group(2))
rule = Rule(num1, num2)
if not have_severity and rule is not None:
res = severity_pattern.match(line)
if res:
rule.misra_severity = res.group(1)
have_severity = True
else:
severity_loc += 1
# Only look for severity on the Rule line
# or the next non-blank line after
# If it's not in either of those locations then
# assume a severity was not provided.
if severity_loc < 2:
continue
else:
rule.misra_severity = ''
have_severity = True
if rule is None:
continue
# Parse continuing of rule text.
if expect_more:
if a_z_pattern.match(line):
self.ruleTexts[rule.num].text += ' ' + line
continue
expect_more = False
continue
# Parse beginning of rule text.
if xA_Z_pattern.match(line):
rule.text = line
self.ruleTexts[rule.num] = rule
expect_more = True
file_stream.close()
def verifyRuleTexts(self):
"""Prints rule numbers without rule text."""
rule_texts_rules = []
for rule_num in self.ruleTexts:
rule = self.ruleTexts[rule_num]
rule_texts_rules.append(str(rule.num1) + '.' + str(rule.num2))
all_rules = list(getAddonRules() + getCppcheckRules())
missing_rules = list(set(all_rules) - set(rule_texts_rules))
if len(missing_rules) == 0:
print("Rule texts are correct.")
else:
print("Missing rule texts: " + ', '.join(missing_rules))
def printStatus(self, *args, **kwargs):
if not self.settings.quiet:
print(*args, **kwargs)
def executeCheck(self, rule_num, check_function, *args):
"""Execute check function for a single MISRA rule.
:param rule_num: Number of rule in hundreds format
:param check_function: Check function to execute
:param args: Check function arguments
"""
if not self.isRuleGloballySuppressed(rule_num):
misra_cpp = (
202, # misra-c2012-2.3 : misra c++2008 0-1-9
203, # misra-c2012-2.3 : misra c++2008 0-1-5
402, # misra-c2012-4.2 : misra c++2008 2-3-1
701, # misra-c2012-7.1 : misra c++2008 2-3-1
702, # misra-c2012-7.2 : misra c++2008 2-13-2
1203, # misra-c2012-12.3 : misra c++2008 5-14-1
1204, # misra-c2012-12.4 : misra c++2008 5-18-1
1305, # misra-c2012-13.5 : misra c++2008 5-19-1
1702, # misra-c2012-17.2 : misra c++2008 7-5-4
1901) # misra-c2012-19.1 : misra c++2008 2-13-3
if (not self.is_cpp) or rule_num in misra_cpp:
check_function(*args)
def parseDump(self, dumpfile, path_premium_addon=None):
def fillVerifyExpected(verify_expected, tok):
"""Add expected suppressions to verify_expected list."""
rule_re = re.compile(r'[0-9]+\.[0-9]+')
if tok.str.startswith('//') and 'TODO' not in tok.str:
for word in tok.str[2:].split(' '):
if rule_re.match(word) or word == "config":
verify_expected.append('%s:%d %s' % (tok.file, tok.linenr, word))
data = cppcheckdata.parsedump(dumpfile)
typeBits['CHAR'] = data.platform.char_bit
typeBits['SHORT'] = data.platform.short_bit
typeBits['INT'] = data.platform.int_bit
typeBits['LONG'] = data.platform.long_bit
typeBits['LONG_LONG'] = data.platform.long_long_bit
typeBits['POINTER'] = data.platform.pointer_bit
if self.settings.verify:
# Add suppressions from the current file
for tok in data.rawTokens:
fillVerifyExpected(self.verify_expected, tok)
# Add suppressions from the included headers
include_re = re.compile(r'^#include [<"]([a-zA-Z0-9]+[a-zA-Z\-_./\\0-9]*)[">]$')
dump_dir = os.path.dirname(data.filename)
for conf in data.configurations:
for directive in conf.directives:
m = re.match(include_re, directive.str)
if not m:
continue
header_dump_path = os.path.join(dump_dir, m.group(1) + '.dump')
if not os.path.exists(header_dump_path):
continue
header_data = cppcheckdata.parsedump(header_dump_path)
for tok in header_data.rawTokens:
fillVerifyExpected(self.verify_expected, tok)
else:
self.printStatus('Checking ' + dumpfile + '...')
self.is_cpp = data.files and data.files[0].endswith('.cpp')
for cfgNumber, cfg in enumerate(data.iterconfigurations()):
if not self.settings.quiet:
self.printStatus('Checking %s, config %s...' % (dumpfile, cfg.name))
self.executeCheck(102, self.misra_1_2, cfg)
if not path_premium_addon:
self.executeCheck(104, self.misra_1_4, cfg)
self.executeCheck(202, self.misra_2_2, cfg)
self.executeCheck(203, self.misra_2_3, dumpfile, cfg.typedefInfo)
self.executeCheck(204, self.misra_2_4, dumpfile, cfg)
self.executeCheck(205, self.misra_2_5, dumpfile, cfg)
self.executeCheck(207, self.misra_2_7, cfg)
# data.rawTokens is same for all configurations
if cfgNumber == 0:
self.executeCheck(301, self.misra_3_1, data.rawTokens)
self.executeCheck(302, self.misra_3_2, data.rawTokens)
self.executeCheck(401, self.misra_4_1, data.rawTokens)
self.executeCheck(402, self.misra_4_2, data.rawTokens)
self.executeCheck(501, self.misra_5_1, cfg)
self.executeCheck(502, self.misra_5_2, cfg)
self.executeCheck(504, self.misra_5_4, cfg)
self.executeCheck(505, self.misra_5_5, cfg)
self.executeCheck(506, self.misra_5_6, dumpfile, cfg.typedefInfo)
self.executeCheck(507, self.misra_5_7, dumpfile, cfg)
self.executeCheck(508, self.misra_5_8, dumpfile, cfg)
self.executeCheck(509, self.misra_5_9, dumpfile, cfg)
self.executeCheck(601, self.misra_6_1, cfg)
self.executeCheck(602, self.misra_6_2, cfg)
if cfgNumber == 0:
self.executeCheck(701, self.misra_7_1, data.rawTokens)
self.executeCheck(702, self.misra_7_2, cfg)
if cfgNumber == 0:
self.executeCheck(703, self.misra_7_3, data.rawTokens)
self.executeCheck(704, self.misra_7_4, cfg)
self.executeCheck(801, self.misra_8_1, cfg)
if cfgNumber == 0:
self.executeCheck(802, self.misra_8_2, cfg, data.rawTokens)
self.executeCheck(804, self.misra_8_4, cfg)
self.executeCheck(805, self.misra_8_5, dumpfile, cfg)
self.executeCheck(806, self.misra_8_6, dumpfile, cfg)
self.executeCheck(807, self.misra_8_7, dumpfile, cfg)
self.executeCheck(808, self.misra_8_8, cfg)
self.executeCheck(809, self.misra_8_9, cfg)
self.executeCheck(810, self.misra_8_10, cfg)
self.executeCheck(811, self.misra_8_11, cfg)
self.executeCheck(812, self.misra_8_12, cfg)
if cfgNumber == 0:
self.executeCheck(814, self.misra_8_14, data.rawTokens)
self.executeCheck(902, self.misra_9_2, cfg)
self.executeCheck(903, self.misra_9_3, cfg)
self.executeCheck(904, self.misra_9_4, cfg)
if cfgNumber == 0:
self.executeCheck(905, self.misra_9_5, cfg, data.rawTokens)
if not path_premium_addon:
self.executeCheck(1001, self.misra_10_1, cfg)
self.executeCheck(1002, self.misra_10_2, cfg)
self.executeCheck(1003, self.misra_10_3, cfg)
self.executeCheck(1004, self.misra_10_4, cfg)
self.executeCheck(1005, self.misra_10_5, cfg)
self.executeCheck(1006, self.misra_10_6, cfg)
self.executeCheck(1007, self.misra_10_7, cfg)
self.executeCheck(1008, self.misra_10_8, cfg)
self.executeCheck(1101, self.misra_11_1, cfg)
self.executeCheck(1102, self.misra_11_2, cfg)
self.executeCheck(1103, self.misra_11_3, cfg)
self.executeCheck(1104, self.misra_11_4, cfg)
self.executeCheck(1105, self.misra_11_5, cfg)
self.executeCheck(1106, self.misra_11_6, cfg)
self.executeCheck(1107, self.misra_11_7, cfg)
self.executeCheck(1108, self.misra_11_8, cfg)
self.executeCheck(1109, self.misra_11_9, cfg)
if cfgNumber == 0:
self.executeCheck(1201, self.misra_12_1_sizeof, data.rawTokens)
self.executeCheck(1201, self.misra_12_1, cfg)
self.executeCheck(1202, self.misra_12_2, cfg)
self.executeCheck(1203, self.misra_12_3, cfg)
self.executeCheck(1204, self.misra_12_4, cfg)
self.executeCheck(1301, self.misra_13_1, cfg)
self.executeCheck(1303, self.misra_13_3, cfg)
self.executeCheck(1304, self.misra_13_4, cfg)
self.executeCheck(1305, self.misra_13_5, cfg)
self.executeCheck(1306, self.misra_13_6, cfg)
self.executeCheck(1401, self.misra_14_1, cfg)
self.executeCheck(1402, self.misra_14_2, cfg)
self.executeCheck(1404, self.misra_14_4, cfg)
self.executeCheck(1501, self.misra_15_1, cfg)
self.executeCheck(1502, self.misra_15_2, cfg)
self.executeCheck(1503, self.misra_15_3, cfg)
self.executeCheck(1504, self.misra_15_4, cfg)
self.executeCheck(1505, self.misra_15_5, cfg)
if cfgNumber == 0:
self.executeCheck(1506, self.misra_15_6, data.rawTokens)
self.executeCheck(1507, self.misra_15_7, cfg)
self.executeCheck(1601, self.misra_16_1, cfg)
self.executeCheck(1602, self.misra_16_2, cfg)
if cfgNumber == 0:
self.executeCheck(1603, self.misra_16_3, data.rawTokens)
self.executeCheck(1604, self.misra_16_4, cfg)
self.executeCheck(1605, self.misra_16_5, cfg)
self.executeCheck(1606, self.misra_16_6, cfg)
self.executeCheck(1607, self.misra_16_7, cfg)
self.executeCheck(1701, self.misra_17_1, cfg)
self.executeCheck(1702, self.misra_17_2, cfg)
self.executeCheck(1703, self.misra_17_3, cfg)
self.misra_config(cfg)
if cfgNumber == 0:
self.executeCheck(1706, self.misra_17_6, data.rawTokens)
self.executeCheck(1707, self.misra_17_7, cfg)
self.executeCheck(1708, self.misra_17_8, cfg)
self.executeCheck(1804, self.misra_18_4, cfg)
self.executeCheck(1805, self.misra_18_5, cfg)
self.executeCheck(1807, self.misra_18_7, cfg)
self.executeCheck(1808, self.misra_18_8, cfg)
self.executeCheck(1902, self.misra_19_2, cfg)
self.executeCheck(2001, self.misra_20_1, cfg)
self.executeCheck(2002, self.misra_20_2, cfg)
self.executeCheck(2003, self.misra_20_3, cfg)
self.executeCheck(2004, self.misra_20_4, cfg)
self.executeCheck(2005, self.misra_20_5, cfg)
self.executeCheck(2007, self.misra_20_7, cfg)
self.executeCheck(2008, self.misra_20_8, cfg)
self.executeCheck(2009, self.misra_20_9, cfg)
self.executeCheck(2010, self.misra_20_10, cfg)
self.executeCheck(2011, self.misra_20_11, cfg)
self.executeCheck(2012, self.misra_20_12, cfg)
self.executeCheck(2013, self.misra_20_13, cfg)
self.executeCheck(2014, self.misra_20_14, cfg)
self.executeCheck(2101, self.misra_21_1, cfg)
self.executeCheck(2102, self.misra_21_2, cfg)
self.executeCheck(2103, self.misra_21_3, cfg)
self.executeCheck(2104, self.misra_21_4, cfg)
self.executeCheck(2105, self.misra_21_5, cfg)
self.executeCheck(2106, self.misra_21_6, cfg)
self.executeCheck(2107, self.misra_21_7, cfg)
self.executeCheck(2108, self.misra_21_8, cfg)
self.executeCheck(2109, self.misra_21_9, cfg)
self.executeCheck(2110, self.misra_21_10, cfg)
self.executeCheck(2111, self.misra_21_11, cfg)
self.executeCheck(2112, self.misra_21_12, cfg)
self.executeCheck(2114, self.misra_21_14, cfg)
self.executeCheck(2115, self.misra_21_15, cfg)
self.executeCheck(2116, self.misra_21_16, cfg)
self.executeCheck(2119, self.misra_21_19, cfg)
self.executeCheck(2120, self.misra_21_20, cfg)
self.executeCheck(2121, self.misra_21_21, cfg)
# 22.4 is already covered by Cppcheck writeReadOnlyFile
self.executeCheck(2205, self.misra_22_5, cfg)
self.executeCheck(2207, self.misra_22_7, cfg)
self.executeCheck(2208, self.misra_22_8, cfg)
self.executeCheck(2209, self.misra_22_9, cfg)
self.executeCheck(2210, self.misra_22_10, cfg)
def read_ctu_info_line(self, line):
if not line.startswith('{'):
return None
try:
ctu_info = json.loads(line)
except json.decoder.JSONDecodeError:
return None
if 'summary' not in ctu_info:
return None
if 'data' not in ctu_info:
return None
return ctu_info
def analyse_ctu_info(self, ctu_info_files):
all_typedef_info = {}
all_tagname_info = {}
all_macro_info = {}
all_external_identifiers_decl = {}
all_external_identifiers_def = {}
all_internal_identifiers = {}
all_local_identifiers = {}
all_usage_files = {}
from cppcheckdata import Location
def is_different_location(loc1, loc2):
return loc1['file'] != loc2['file'] or loc1['line'] != loc2['line']
def is_different_file(loc1, loc2):
return loc1['file'] != loc2['file']
try:
for filename in ctu_info_files:
for line in open(filename, 'rt'):
s = self.read_ctu_info_line(line)
if s is None:
continue
summary_type = s.get('summary', '')
summary_data = s.get('data', None)
if summary_type == 'MisraTypedefInfo':
for new_typedef_info in summary_data:
key = new_typedef_info['name']
existing_typedef_info = all_typedef_info.get(key, None)
if existing_typedef_info:
if is_different_location(existing_typedef_info, new_typedef_info):
self.reportError(Location(existing_typedef_info), 5, 6)
self.reportError(Location(new_typedef_info), 5, 6)
else:
existing_typedef_info['used'] = existing_typedef_info['used'] or new_typedef_info['used']
else:
all_typedef_info[key] = new_typedef_info
if summary_type == 'MisraTagName':
for new_tagname_info in summary_data:
key = new_tagname_info['name']
existing_tagname_info = all_tagname_info.get(key, None)
if existing_tagname_info:
if is_different_location(existing_tagname_info, new_tagname_info):
self.reportError(Location(existing_tagname_info), 5, 7)
self.reportError(Location(new_tagname_info), 5, 7)
else:
existing_tagname_info['used'] = existing_tagname_info['used'] or new_tagname_info['used']
else:
all_tagname_info[key] = new_tagname_info
if summary_type == 'MisraMacro':
for new_macro in summary_data:
key = new_macro['name']
existing_macro = all_macro_info.get(key, None)
if existing_macro:
existing_macro['used'] = existing_macro['used'] or new_macro['used']
else:
all_macro_info[key] = new_macro
if summary_type == 'MisraExternalIdentifiers':
for s in sorted(summary_data, key=lambda d: "%s %s %s" %(d['file'],d['line'], d['column'] )):
is_declaration = s['decl']
if is_declaration:
all_external_identifiers = all_external_identifiers_decl
else:
all_external_identifiers = all_external_identifiers_def
name = s['name']
if name in all_external_identifiers:
if is_declaration and is_different_location(s, all_external_identifiers[name]):
self.reportError(Location(s), 8, 5)
self.reportError(Location(all_external_identifiers[name]), 8, 5)
elif is_different_file(s, all_external_identifiers[name]):
self.reportError(Location(s), 8, 6)
self.reportError(Location(all_external_identifiers[name]), 8, 6)
all_external_identifiers[name] = s
if summary_type == 'MisraInternalIdentifiers':
for s in summary_data:
if s['name'] in all_internal_identifiers:
if not s['inlinefunc'] or s['file'] != all_internal_identifiers[s['name']]['file']:
self.reportError(Location(s), 5, 9)
self.reportError(Location(all_internal_identifiers[s['name']]), 5, 9)
all_internal_identifiers[s['name']] = s
if summary_type == 'MisraLocalIdentifiers':
for s in summary_data:
all_local_identifiers[s['name']] = s
if summary_type == 'MisraUsage':
for s in summary_data:
if s['name'] in all_usage_files:
all_usage_files[s['name']].append(s['file'])
else:
all_usage_files[s['name']] = [s['file']]
except FileNotFoundError:
return
unused_typedefs = [tdi for tdi in all_typedef_info.values() if not tdi['used']]
for tdi in unused_typedefs:
self.reportError(Location(tdi), 2, 3)
unused_tags = [tag for tag in all_tagname_info.values() if not tag['used']]
for tag in unused_tags:
self.reportError(Location(tag), 2, 4)
unused_macros = [m for m in all_macro_info.values() if not m['used']]
for m in unused_macros:
self.reportError(Location(m), 2, 5)
all_external_identifiers = all_external_identifiers_decl
all_external_identifiers.update(all_external_identifiers_def)
for name, external_identifier in all_external_identifiers.items():
internal_identifier = all_internal_identifiers.get(name)
if internal_identifier:
self.reportError(Location(internal_identifier), 5, 8)
self.reportError(Location(external_identifier), 5, 8)
local_identifier = all_local_identifiers.get(name)
if local_identifier:
self.reportError(Location(local_identifier), 5, 8)
self.reportError(Location(external_identifier), 5, 8)
for name, files in all_usage_files.items():
#print('%s:%i' % (name, count))
count = len(files)
if count != 1 or name not in all_external_identifiers_def:
continue
if files[0] != Location(all_external_identifiers_def[name]).file:
continue
if name in all_external_identifiers:
self.reportError(Location(all_external_identifiers[name]), 8, 7)
RULE_TEXTS_HELP = '''Path to text file of MISRA rules
If you have the tool 'pdftotext' you might be able
to generate this textfile with such command:
pdftotext MISRA_C_2012.pdf MISRA_C_2012.txt
Otherwise you can more or less copy/paste the chapter
Appendix A Summary of guidelines
from the MISRA pdf. You can buy the MISRA pdf from
http://www.misra.org.uk/
Format:
<..arbitrary text..>
Appendix A Summary of guidelines
Rule 1.1 Required
Rule text for 1.1
continuation of rule text for 1.1
Rule 1.2 Mandatory
Rule text for 1.2
continuation of rule text for 1.2
<...>
'''
SUPPRESS_RULES_HELP = '''MISRA rules to suppress (comma-separated)
For example, if you'd like to suppress rules 15.1, 11.3,
and 20.13, run:
python misra.py --suppress-rules 15.1,11.3,20.13 ...
'''
def get_args_parser():
"""Generates list of command-line arguments acceptable by misra.py script."""
parser = cppcheckdata.ArgumentParser()
parser.add_argument("--rule-texts", type=str, help=RULE_TEXTS_HELP)
parser.add_argument("--verify-rule-texts",
help="Verify that all supported rules texts are present in given file and exit.",
action="store_true")
parser.add_argument("--suppress-rules", type=str, help=SUPPRESS_RULES_HELP)
parser.add_argument("--no-summary", help="Hide summary of violations", action="store_true")
parser.add_argument("--show-suppressed-rules", help="Print rule suppression list", action="store_true")
parser.add_argument("-P", "--file-prefix", type=str, help="Prefix to strip when matching suppression file rules")
parser.add_argument("-generate-table", help=argparse.SUPPRESS, action="store_true")
parser.add_argument("-verify", help=argparse.SUPPRESS, action="store_true")
parser.add_argument("--severity", type=str, help="Set a custom severity string, for example 'error' or 'warning'. ")
return parser
def main():
parser = get_args_parser()
args = parser.parse_args()
settings = MisraSettings(args)
checker = MisraChecker(settings)
checker.path_premium_addon = cppcheckdata.get_path_premium_addon()
if args.generate_table:
generateTable()
sys.exit(0)
if args.rule_texts:
filename = os.path.expanduser(args.rule_texts)
filename = os.path.normpath(filename)
checker.ruleText_filename = filename
if os.path.isfile(filename):
checker.loadRuleTexts(filename)
if args.verify_rule_texts:
checker.verifyRuleTexts()
sys.exit(0)
else:
if args.verify_rule_texts:
print('Fatal error: file is not found: ' + filename)
sys.exit(1)
if args.verify_rule_texts and not args.rule_texts:
print("Error: Please specify rule texts file with --rule-texts=<file>")
sys.exit(1)
if args.suppress_rules:
checker.setSuppressionList(args.suppress_rules)
if args.file_prefix:
checker.setFilePrefix(args.file_prefix)
dump_files, ctu_info_files = cppcheckdata.get_files(args)
if (not dump_files) and (not ctu_info_files):
if not args.quiet:
print("No input files.")
sys.exit(0)
if args.severity:
checker.setSeverity(args.severity)
for item in dump_files:
checker.parseDump(item,checker.path_premium_addon)
if settings.verify:
verify_expected = checker.get_verify_expected()
verify_actual = checker.get_verify_actual()
exitCode = 0
for expected in verify_expected:
if expected not in verify_actual:
print('Expected but not seen: ' + expected)
exitCode = 1
for actual in verify_actual:
if actual not in verify_expected:
print('Not expected: ' + actual)
exitCode = 1
# Existing behavior of verify mode is to exit
# on the first un-expected output.
# TODO: Is this required? or can it be moved to after
# all input files have been processed
if exitCode != 0:
sys.exit(exitCode)
checker.analyse_ctu_info(ctu_info_files)
if settings.verify:
sys.exit(exitCode)
number_of_violations = len(checker.get_violations())
if number_of_violations > 0:
if settings.show_summary:
print("\nMISRA rules violations found:\n\t%s\n" % (
"\n\t".join(["%s: %d" % (viol, len(checker.get_violations(viol))) for viol in
checker.get_violation_types()])))
rules_violated = {}
for severity, ids in checker.get_violations():
for misra_id in ids:
rules_violated[misra_id] = rules_violated.get(misra_id, 0) + 1
print("MISRA rules violated:")
convert = lambda text: int(text) if text.isdigit() else 0
misra_sort = lambda key: [convert(c) for c in re.split(r'[\.-]([0-9]*)', key)]
for misra_id in sorted(rules_violated.keys(), key=misra_sort):
res = re.match(r'misra-c2012-([0-9]+)\\.([0-9]+)', misra_id)
if res is None:
num = 0
else:
num = int(res.group(1)) * 100 + int(res.group(2))
severity = '-'
if num in checker.ruleTexts:
severity = checker.ruleTexts[num].cppcheck_severity
print("\t%15s (%s): %d" % (misra_id, severity, rules_violated[misra_id]))
if args.show_suppressed_rules:
checker.showSuppressedRules()
if __name__ == '__main__':
main()
sys.exit(cppcheckdata.EXIT_CODE)
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