#!/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= 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', # '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 token.astOperand1 is None or not token.astOperand1.isName: continue if token.astOperand1.varId and (token.astOperand1.variable is None or 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, '') if directive: self.reportError(directive, 21, 4) def misra_21_5(self, data): directive = findInclude(data.directives, '') if directive: self.reportError(directive, 21, 5) def misra_21_6(self, data): dir_stdio = findInclude(data.directives, '') dir_wchar = findInclude(data.directives, '') 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, '') 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, '') if directive: self.reportError(directive, 21, 11) def misra_21_12(self, data): if findInclude(data.directives, ''): 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= 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=") 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)