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cppcheck/addons/misra.py

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#!/usr/bin/env python
#
# MISRA C 2012 checkers
#
# Example usage of this addon (scan a sourcefile main.cpp)
# cppcheck --dump main.cpp
# python misra.py --rule-texts=<path-to-rule-texts> main.cpp.dump
#
# Limitations: This addon is released as open source. Rule texts can't be freely
# distributed. https://www.misra.org.uk/forum/viewtopic.php?f=56&t=1189
#
# The MISRA standard documents may be obtained from https://www.misra.org.uk
#
# Total number of rules: 143
from __future__ import print_function
import cppcheckdata
import sys
import re
import os
import argparse
import codecs
typeBits = {
'CHAR': None,
'SHORT': None,
'INT': None,
'LONG': None,
'LONG_LONG': None,
'POINTER': None
}
def simpleMatch(token, pattern):
for p in pattern.split(' '):
if not token or token.str != p:
return False
token = token.next
return True
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
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'
}
def getEssentialTypeCategory(expr):
if not expr:
return None
if expr.valueType and expr.valueType.typeScope:
return "enum<" + expr.valueType.typeScope.className + ">"
if expr.variable:
typeToken = expr.variable.typeStartToken
while typeToken:
if typeToken.valueType:
if typeToken.valueType.type in {'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
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 getEssentialType(expr):
if not expr:
return None
if expr.variable:
typeToken = expr.variable.typeStartToken
while typeToken and typeToken.isName:
if typeToken.str in {'char', 'short', 'int', 'long', 'float', 'double'}:
return typeToken.str
typeToken = typeToken.next
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 not e1 or not e2:
return None
types = ['bool', 'char', 'short', 'int', 'long', 'long long']
try:
i1 = types.index(e1)
i2 = types.index(e2)
if i2 >= i1:
return types[i2]
return types[i1]
except ValueError:
return None
elif expr.str == "~":
e1 = getEssentialType(expr.astOperand1)
return e1
return None
def bitsOfEssentialType(expr):
type = getEssentialType(expr)
if type is None:
return 0
if type == 'char':
return typeBits['CHAR']
if type == 'short':
return typeBits['SHORT']
if type == 'int':
return typeBits['INT']
if type == 'long':
return typeBits['LONG']
if type == 'long long':
return typeBits['LONG_LONG']
return 0
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 isFunctionCall(expr):
if not expr:
return False
if expr.str != '(' or not expr.astOperand1:
return False
if expr.astOperand1 != expr.previous:
return False
if expr.astOperand1.str in KEYWORDS:
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 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 hasSideEffectsRecursive(expr):
if not expr:
return False
if expr.str == '=' and expr.astOperand1 and expr.astOperand1.str == '[':
prev = expr.astOperand1.previous
if prev and (prev.str == '{' or prev.str == '{'):
return hasSideEffectsRecursive(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 False
if expr.str in {'++', '--', '='}:
return True
# Todo: Check function calls
return hasSideEffectsRecursive(expr.astOperand1) or hasSideEffectsRecursive(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 isConstantExpression(expr):
if expr.isNumber:
return True
if expr.isName:
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 isUnsignedInt(expr):
# TODO this function is very incomplete. use ValueType?
if not expr:
return False
if expr.isNumber:
return 'u' in expr.str or 'U' in expr.str
if expr.str in {'+', '-', '*', '/', '%'}:
return isUnsignedInt(expr.astOperand1) or isUnsignedInt(expr.astOperand2)
return False
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 >= '0' and c <= '9') or (c >= 'a' and c <= 'z') or (c >= 'A' and c <= 'Z')
def isHexDigit(c):
return (c >= '0' and c <= '9') or (c >= 'a' and c <= 'f') or (c >= 'A' and c <= 'F')
def isOctalDigit(c):
return c >= '0' and c <= '7'
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
class Define:
def __init__(self, directive):
self.args = []
self.expansionList = ''
res = re.match(r'#define [A-Za-z0-9_]+\(([A-Za-z0-9_,]+)\)[ ]+(.*)', directive.str)
if res is None:
return
self.args = res.group(1).split(',')
self.expansionList = res.group(2)
def getAddonRules():
"""Returns dict of MISRA rules handled by this addon."""
addon_rules = []
compiled = re.compile(r'.*def[ ]+misra_([0-9]+)_([0-9]+)[(].*')
for line in open(__file__):
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', '2.2', '2.4', '2.6', '8.3', '12.2', '13.2', '13.6',
'14.3', '17.5', '18.1', '18.2', '18.3', '18.6', '20.6',
'22.1', '22.2', '22.4', '22.6']
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] = 12
numberOfRules[22] = 6
# 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_SEVERIY_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_SEVERIY_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
class MisraChecker:
def __init__(self, settings, stdversion="c90"):
"""
: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()
# 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 contails 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()
# List of suppression extracted from the dumpfile
self.dumpfileSuppressions = None
# Prefix to ignore when matching suppression files.
self.filePrefix = None
# Statistics of all violations suppressed per rule
self.suppressionStats = dict()
self.stdversion = stdversion
def get_num_significant_naming_chars(self, cfg):
if cfg.standards and cfg.standards.c == "c99":
return 63
else:
return 31
def misra_3_1(self, rawTokens):
for token in rawTokens:
if token.str.startswith('/*') or token.str.startswith('//'):
s = token.str.lstrip('/')
if '//' in s or '/*' in s:
self.reportError(token, 3, 1)
def misra_4_1(self, rawTokens):
for token in rawTokens:
if ((token.str[0] != '"') and (token.str[0] != '\'')):
continue
pos = 1
while pos < len(token.str) - 2:
pos1 = pos
pos = pos + 1
if token.str[pos1] != '\\':
continue
if token.str[pos1 + 1] == '\\':
pos = pos1 + 2
continue
if token.str[pos1 + 1] == 'x':
if not isHexDigit(token.str[pos1 + 2]):
self.reportError(token, 4, 1)
continue
if not isHexDigit(token.str[pos1 + 3]):
self.reportError(token, 4, 1)
continue
elif isOctalDigit(token.str[pos1 + 1]):
if not isOctalDigit(token.str[pos1 + 2]):
self.reportError(token, 4, 1)
continue
if not isOctalDigit(token.str[pos1 + 2]):
self.reportError(token, 4, 1)
continue
else:
continue
c = token.str[pos1 + 4]
if c != '"' and c != '\\':
self.reportError(token, 4, 1)
def misra_5_1(self, data):
varnames = []
for var in data.variables:
if var.nameToken is None:
continue
if len(var.nameToken.str) <= 31:
continue
if not hasExternalLinkage(var):
continue
if var.nameToken.str[:31] in varnames:
self.reportError(var.nameToken, 5, 1)
else:
varnames.append(var.nameToken.str[:31])
def misra_5_2(self, data):
scopeVars = {}
for var in data.variables:
if var.nameToken is None:
continue
if len(var.nameToken.str) <= 31:
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[:31] == variable2.nameToken.str[:31] and
variable1.Id != variable2.Id):
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[:31] == innerscope.className[:31]:
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[:31] == scopename2.className[:31]:
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_3(self, data):
num_sign_chars = self.get_num_significant_naming_chars(data)
enum = []
scopeVars = {}
for var in data.variables:
if var.nameToken is not None:
if var.nameToken.scope not in scopeVars:
scopeVars[var.nameToken.scope] = []
scopeVars[var.nameToken.scope].append(var)
for innerScope in data.scopes:
if innerScope.type == "Enum":
enum_token = innerScope.bodyStart.next
while enum_token != innerScope.bodyEnd:
if enum_token.values and enum_token.isName:
enum.append(enum_token.str)
enum_token = enum_token.next
continue
if innerScope not in scopeVars:
continue
if innerScope.type == "Global":
continue
for innerVar in scopeVars[innerScope]:
outerScope = innerScope.nestedIn
while outerScope:
if outerScope not in scopeVars:
outerScope = outerScope.nestedIn
continue
for outerVar in scopeVars[outerScope]:
if innerVar.nameToken.str[:num_sign_chars] == outerVar.nameToken.str[:num_sign_chars]:
if outerVar.isArgument and outerScope.type == "Global" and not innerVar.isArgument:
continue
if int(innerVar.nameToken.linenr) > int(outerVar.nameToken.linenr):
self.reportError(innerVar.nameToken, 5, 3)
else:
self.reportError(outerVar.nameToken, 5, 3)
outerScope = outerScope.nestedIn
for scope in data.scopes:
if scope.className and innerVar.nameToken.str[:num_sign_chars] == scope.className[:num_sign_chars]:
if int(innerVar.nameToken.linenr) > int(scope.bodyStart.linenr):
self.reportError(innerVar.nameToken, 5, 3)
else:
self.reportError(scope.bodyStart, 5, 3)
for e in enum:
for scope in data.scopes:
if scope.className and innerVar.nameToken.str[:num_sign_chars] == e[:num_sign_chars]:
if int(innerVar.nameToken.linenr) > int(innerScope.bodyStart.linenr):
self.reportError(innerVar.nameToken, 5, 3)
else:
self.reportError(innerScope.bodyStart, 5, 3)
for e in enum:
for scope in data.scopes:
if scope.className and scope.className[:num_sign_chars] == e[:num_sign_chars]:
self.reportError(scope.bodyStart, 5, 3)
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_, ]+)[)]')
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"] = []
macro[dir]["name"] = res1.group(1)
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)
for mvar in macro:
if len(macro[mvar]["params"]) > 0:
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)
for x, m_var1 in enumerate(macro):
for y, m_var2 in enumerate(macro):
if x < y and macro[m_var1]["name"][:num_sign_chars] == macro[m_var2]["name"][:num_sign_chars]:
if m_var1.linenr > m_var2.linenr:
self.reportError(m_var1, 5, 4)
else:
self.reportError(m_var2, 5, 4)
for param in macro[m_var2]["params"]:
if macro[m_var1]["name"][:num_sign_chars] == param[:num_sign_chars]:
if m_var1.linenr > m_var2.linenr:
self.reportError(m_var1, 5, 4)
else:
self.reportError(m_var2, 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.append(res.group(1))
for var in data.variables:
for macro in macroNames:
if var.nameToken is not None:
if var.nameToken.str[:num_sign_chars] == macro[:num_sign_chars]:
self.reportError(var.nameToken, 5, 5)
for scope in data.scopes:
for macro in macroNames:
if scope.className and scope.className[:num_sign_chars] == macro[:num_sign_chars]:
self.reportError(scope.bodyStart, 5, 5)
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_3(self, rawTokens):
compiled = re.compile(r'^[0-9.uU]+l')
for tok in rawTokens:
if compiled.match(tok.str):
self.reportError(tok, 7, 3)
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.str == e_token.link
continue
if not e_token.previous.str 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_5(self, 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
e1 = getEssentialTypeCategory(token.astOperand1)
e2 = getEssentialTypeCategory(token.astOperand2)
if not e1 or not e2:
continue
if token.str in ['<<', '>>']:
if e1 != 'unsigned':
self.reportError(token, 10, 1)
elif e2 != 'unsigned' and not token.astOperand2.isNumber:
self.reportError(token, 10, 1)
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.astOperand1.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_6(self, data):
for token in data.tokenlist:
if token.str != '=' or not token.astOperand1 or not token.astOperand2:
continue
if (token.astOperand2.str not in {'+', '-', '*', '/', '%', '&', '|', '^', '>>', "<<", "?", ":", '~'} and
not isCast(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:
intTypes = ['char', 'short', 'int', 'long', 'long long']
index1 = intTypes.index(vt1.type)
if isCast(token.astOperand2):
e = vt2.type
else:
e = getEssentialType(token.astOperand2)
if not e:
continue
index2 = intTypes.index(e)
if index1 > index2:
self.reportError(token, 10, 6)
except ValueError:
pass
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:
intTypes = ['char', 'short', 'int', 'long', 'long long']
index1 = intTypes.index(token.valueType.type)
e = getEssentialType(token.astOperand1)
if not e:
continue
index2 = intTypes.index(e)
if index1 > index2:
self.reportError(token, 10, 8)
except ValueError:
pass
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):
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':
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.str != "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
vt2.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):
for val in token.astOperand2.values:
if val.intvalue == 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(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 != ',' or token.scope.type == 'Enum' or \
token.scope.type == 'Class' or token.scope.type == 'Global':
continue
if token.astParent and token.astParent.str in ['(', ',', '{']:
continue
self.reportError(token, 12, 3)
def misra_12_4(self, data):
if typeBits['INT'] == 16:
max_uint = 0xffff
elif typeBits['INT'] == 32:
max_uint = 0xffffffff
else:
return
for token in data.tokenlist:
if (not isConstantExpression(token)) or (not isUnsignedInt(token)):
continue
if not token.values:
continue
for value in token.values:
if value.intvalue < 0 or value.intvalue > max_uint:
self.reportError(token, 12, 4)
break
def misra_13_1(self, data):
for token in data.tokenlist:
if not simpleMatch(token, '= {'):
continue
init = token.next
if hasSideEffectsRecursive(init):
self.reportError(init, 13, 1)
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.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 hasSideEffectsRecursive(token.astOperand2):
self.reportError(token, 13, 5)
def misra_13_6(self, data):
for token in data.tokenlist:
if token.str == 'sizeof' and hasSideEffectsRecursive(token.next):
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:
expressions = getForLoopExpressions(token)
if not expressions:
continue
if expressions[0] and not expressions[0].isAssignmentOp:
self.reportError(token, 14, 2)
elif hasSideEffectsRecursive(expressions[1]):
self.reportError(token, 14, 2)
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 not isBoolExpression(token.astOperand2):
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)
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
for token in rawTokens:
if token.str in ['if', 'for', 'while']:
if simpleMatch(token.previous, '# if'):
continue
if simpleMatch(token.previous, "} while"):
# is there a 'do { .. } while'?
start = rawlink(token.previous)
if start and simpleMatch(start.previous, 'do {'):
continue
if state == 2:
self.reportError(tok1, 15, 6)
state = 1
indent = 0
tok1 = token
elif token.str == 'else':
if simpleMatch(token.previous, '# else'):
continue
if simpleMatch(token, '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 != '{':
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
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)
# TODO add 16.1 rule
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 = STATE_NONE
for token in rawTokens:
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
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?
link = findRawLink(token)
if (link is None) or (link.previous is None) or (link.previous.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_6(self, rawTokens):
for token in rawTokens:
if simpleMatch(token, '[ static'):
self.reportError(token, 17, 6)
def misra_17_7(self, data):
for token in data.tokenlist:
if not token.scope.isExecutable:
continue
if token.str != '(' or token.astParent:
continue
if not token.previous.isName or token.previous.varId:
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_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_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
if not isConstantExpression(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):
for directive in data.directives:
if not directive.str.startswith('#include'):
continue
for token in data.tokenlist:
if token.file != directive.file:
continue
if int(token.linenr) < int(directive.linenr):
self.reportError(directive, 20, 1)
break
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, rawTokens):
linenr = -1
for token in rawTokens:
if token.str.startswith('/') or token.linenr == linenr:
continue
linenr = token.linenr
if not simpleMatch(token, '# include'):
continue
headerToken = token.next.next
num = 0
while headerToken and headerToken.linenr == linenr:
if not headerToken.str.startswith('/*') and not headerToken.str.startswith('//'):
num += 1
headerToken = headerToken.next
if num != 1:
self.reportError(token, 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 (res.group(1) in KEYWORDS):
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):
for directive in data.directives:
d = Define(directive)
exp = '(' + d.expansionList + ')'
for arg in d.args:
pos = 0
while pos < len(exp):
pos = exp.find(arg, pos)
if pos < 0:
break
pos1 = pos - 1
pos2 = pos + len(arg)
pos = pos2
if isalnum(exp[pos1]) or exp[pos1]=='_':
continue
if isalnum(exp[pos2]) or exp[pos2]=='_':
continue
while exp[pos1] == ' ':
pos1 -= 1
if exp[pos1] != '(' and exp[pos1] != '[':
self.reportError(directive, 20, 7);
break
while exp[pos2] == ' ':
pos2 += 1
if exp[pos2] != ')' and exp[pos2] != ']':
self.reportError(directive, 20, 7);
break
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_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_3(self, data):
for token in data.tokenlist:
if isFunctionCall(token) and (token.astOperand1.str in {'malloc', 'calloc', 'realloc', 'free'}):
self.reportError(token, 21, 3)
def misra_21_4(self, data):
directive = findInclude(data.directives, '<setjmp.h>')
if directive:
self.reportError(directive, 21, 4)
def misra_21_5(self, data):
directive = findInclude(data.directives, '<signal.h>')
if directive:
self.reportError(directive, 21, 5)
def misra_21_6(self, data):
dir_stdio = findInclude(data.directives, '<stdio.h>')
dir_wchar = findInclude(data.directives, '<wchar.h>')
if dir_stdio:
self.reportError(dir_stdio, 21, 6)
if dir_wchar:
self.reportError(dir_wchar, 21, 6)
def misra_21_7(self, data):
for token in data.tokenlist:
if isFunctionCall(token) and (token.astOperand1.str in {'atof', 'atoi', 'atol', 'atoll'}):
self.reportError(token, 21, 7)
def misra_21_8(self, data):
for token in data.tokenlist:
if isFunctionCall(token) and (token.astOperand1.str in {'abort', 'exit', 'getenv', 'system'}):
self.reportError(token, 21, 8)
def misra_21_9(self, data):
for token in data.tokenlist:
if (token.str in {'bsearch', 'qsort'}) and token.next and token.next.str == '(':
self.reportError(token, 21, 9)
def misra_21_10(self, data):
directive = findInclude(data.directives, '<time.h>')
if directive:
self.reportError(directive, 21, 10)
for token in data.tokenlist:
if (token.str == 'wcsftime') and token.next and token.next.str == '(':
self.reportError(token, 21, 10)
def misra_21_11(self, data):
directive = findInclude(data.directives, '<tgmath.h>')
if directive:
self.reportError(directive, 21, 11)
def 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 == 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 suppresed 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.normpath(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 not ruleNum 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 not normalized_filename 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, symbonName) combination
# or None already exists.
ruleItemList = fileDict[normalized_filename]
if line_symbol is None:
# is it already in the list?
if not line_symbol 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, location, ruleNum):
"""
Check to see if a rule is suppressed.
ruleNum is the rule number in hundreds format
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
linenr = location.linenr
# Remove any prefix listed in command arguments from the filename.
filename = None
if location.file is not None:
if self.filePrefix is not None:
filename = remove_file_prefix(location.file, self.filePrefix)
else:
filename = location.file
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 parseSuppressions(self):
"""
Parse the suppression list provided by cppcheck looking for
rules that start with 'misra' or MISRA. The MISRA rule number
follows using either '_' or '.' to separate the numbers.
Examples:
misra_6.0
misra_7_0
misra.21.11
"""
rule_pattern = re.compile(r'^(misra|MISRA)[_.]([0-9]+)[_.]([0-9]+)')
for each in self.dumpfileSuppressions:
res = rule_pattern.match(each.errorId)
if res:
num1 = int(res.group(2)) * 100
ruleNum = num1 + int(res.group(3))
self.addSuppressedRule(ruleNum, each.fileName,
each.lineNumber, each.symbolName)
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, len(self.suppressionStats.get(ruleNum, []))))
for line in sorted(outlist, reverse=True):
print(" %s" % line)
def setFilePrefix(self, prefix):
"""
Set the file prefix to ignnore from files when matching
suppression files
"""
self.filePrefix = prefix
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 reportError(self, location, num1, num2):
ruleNum = num1 * 100 + num2
if self.settings.verify:
self.verify_actual.append(str(location.linenr) + ':' + str(num1) + '.' + str(num2))
elif self.isRuleSuppressed(location, ruleNum):
# Error is suppressed. Ignore
if not ruleNum in self.suppressionStats:
self.suppressionStats[ruleNum] = []
self.suppressionStats[ruleNum].append(location)
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
errmsg += ''.join((' (', self.ruleTexts[ruleNum].misra_severity, ')'))
cppcheck_severity = self.ruleTexts[ruleNum].cppcheck_severity
elif len(self.ruleTexts) == 0:
errmsg = 'misra violation (use --rule-texts=<file> to get proper output)'
else:
return
cppcheckdata.reportError(location, cppcheck_severity, errmsg, 'misra', errorId)
if not misra_severity 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]+)')
Choice_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 = 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
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:
expect_more = False
rule = None
continue
# Parse rule declaration.
res = Rule_pattern.match(line)
if res:
num1 = int(res.group(1))
num2 = int(res.group(2))
rule = Rule(num1, num2)
res = Choice_pattern.match(line)
if res:
rule.misra_severity = res.group(1)
expect_more = False
continue
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
rule = None
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
else:
rule = None
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 parseDump(self, dumpfile):
data = cppcheckdata.parsedump(dumpfile)
self.dumpfileSuppressions = data.suppressions
self.parseSuppressions()
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:
for tok in data.rawTokens:
if tok.str.startswith('//') and 'TODO' not in tok.str:
compiled = re.compile(r'[0-9]+\.[0-9]+')
for word in tok.str[2:].split(' '):
if compiled.match(word):
self.verify_expected.append(str(tok.linenr) + ':' + word)
else:
self.printStatus('Checking ' + dumpfile + '...')
cfgNumber = 0
for cfg in data.configurations:
cfgNumber = cfgNumber + 1
if len(data.configurations) > 1:
self.printStatus('Checking ' + dumpfile + ', config "' + cfg.name + '"...')
if cfgNumber == 1:
self.misra_3_1(data.rawTokens)
self.misra_4_1(data.rawTokens)
self.misra_5_1(cfg)
self.misra_5_2(cfg)
self.misra_5_3(cfg)
self.misra_5_4(cfg)
self.misra_5_5(cfg)
# 6.1 require updates in Cppcheck (type info for bitfields are lost)
# 6.2 require updates in Cppcheck (type info for bitfields are lost)
if cfgNumber == 1:
self.misra_7_1(data.rawTokens)
self.misra_7_3(data.rawTokens)
self.misra_8_11(cfg)
self.misra_8_12(cfg)
if cfgNumber == 1:
self.misra_8_14(data.rawTokens)
self.misra_9_5(data.rawTokens)
self.misra_10_1(cfg)
self.misra_10_4(cfg)
self.misra_10_6(cfg)
self.misra_10_8(cfg)
self.misra_11_3(cfg)
self.misra_11_4(cfg)
self.misra_11_5(cfg)
self.misra_11_6(cfg)
self.misra_11_7(cfg)
self.misra_11_8(cfg)
self.misra_11_9(cfg)
if cfgNumber == 1:
self.misra_12_1_sizeof(data.rawTokens)
self.misra_12_1(cfg)
self.misra_12_2(cfg)
self.misra_12_3(cfg)
self.misra_12_4(cfg)
self.misra_13_1(cfg)
self.misra_13_3(cfg)
self.misra_13_4(cfg)
self.misra_13_5(cfg)
self.misra_13_6(cfg)
self.misra_14_1(cfg)
self.misra_14_2(cfg)
self.misra_14_4(cfg)
self.misra_15_1(cfg)
self.misra_15_2(cfg)
self.misra_15_3(cfg)
self.misra_15_5(cfg)
if cfgNumber == 1:
self.misra_15_6(data.rawTokens)
self.misra_15_7(cfg)
self.misra_16_2(cfg)
if cfgNumber == 1:
self.misra_16_3(data.rawTokens)
self.misra_16_4(cfg)
self.misra_16_5(cfg)
self.misra_16_6(cfg)
self.misra_16_7(cfg)
self.misra_17_1(cfg)
if cfgNumber == 1:
self.misra_17_6(data.rawTokens)
self.misra_17_7(cfg)
self.misra_17_8(cfg)
self.misra_18_5(cfg)
self.misra_18_8(cfg)
self.misra_19_2(cfg)
self.misra_20_1(cfg)
self.misra_20_2(cfg)
if cfgNumber == 1:
self.misra_20_3(data.rawTokens)
self.misra_20_4(cfg)
self.misra_20_5(cfg)
self.misra_20_7(cfg)
self.misra_20_10(cfg)
self.misra_20_13(cfg)
self.misra_20_14(cfg)
self.misra_21_3(cfg)
self.misra_21_4(cfg)
self.misra_21_5(cfg)
self.misra_21_6(cfg)
self.misra_21_7(cfg)
self.misra_21_8(cfg)
self.misra_21_9(cfg)
self.misra_21_10(cfg)
self.misra_21_11(cfg)
# 22.4 is already covered by Cppcheck writeReadOnlyFile
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
Rule text for 1.1
Rule 1.2
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():
"""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("--quiet", help="Only print something when there is an error", action="store_true")
parser.add_argument("--no-summary", help="Hide summary of violations", action="store_true")
parser.add_argument("-verify", help=argparse.SUPPRESS, action="store_true")
parser.add_argument("-generate-table", help=argparse.SUPPRESS, action="store_true")
parser.add_argument("dumpfile", nargs='*', help="Path of dump file from cppcheck")
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("--cli", help="Addon is executed from Cppcheck", action="store_true")
return parser.parse_args()
def main():
args = get_args()
settings = MisraSettings(args)
checker = MisraChecker(settings)
if args.generate_table:
generateTable()
sys.exit(0)
if args.rule_texts:
filename = os.path.normpath(args.rule_texts)
if not os.path.isfile(filename):
print('Fatal error: file is not found: ' + filename)
sys.exit(1)
checker.loadRuleTexts(filename)
if args.verify_rule_texts:
checker.verifyRuleTexts()
sys.exit(0)
if args.verify_rule_texts and not args.rule_texts:
print("Error: Please specify rule texts file with --rule-texts=<file>")
sys.exit(1)
if args.suppress_rules:
checker.setSuppressionList(args.suppress_rules)
if args.file_prefix:
checker.setFilePrefix(args.file_prefix)
if args.dumpfile:
exitCode = 0
for item in args.dumpfile:
checker.parseDump(item)
if settings.verify:
verify_expected = checker.get_verify_expected()
verify_actual = checker.get_verify_actual()
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)
# Under normal operation exit with a non-zero exit code
# if there were any violations.
if not settings.verify:
number_of_violations = len(checker.get_violations())
if number_of_violations > 0:
exitCode = 1
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 text
misra_sort = lambda key: [ convert(c) for c in re.split('[\.-]([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()
sys.exit(exitCode)
if __name__ == '__main__':
main()
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