class AdLint::Exam::CBuiltin::W0580

Public Class Methods

new(phase_ctxt) click to toggle source
Calls superclass method AdLint::Examination::new
# File lib/adlint/exam/c_builtin/cc1_check.rb, line 13540
def initialize(phase_ctxt)
  super
  @interp = phase_ctxt[:cc1_interpreter]
  @interp.on_function_started        += T(:start_function)
  @interp.on_function_ended          += T(:end_function)
  @interp.on_parameter_defined       += T(:add_parameter)
  @interp.on_indirection_expr_evaled += T(:relate_pointer)
  @interp.on_assignment_expr_evaled  += T(:check)
  @params    = nil
  @ptr_relat = nil
end

Private Instance Methods

add_parameter(*, var) click to toggle source
# File lib/adlint/exam/c_builtin/cc1_check.rb, line 13563
def add_parameter(*, var)
  if @params && var.named?
    @params.add(var.name)
  end
end
check(assign_expr, lhs_var, rhs_var) click to toggle source
# File lib/adlint/exam/c_builtin/cc1_check.rb, line 13575
def check(assign_expr, lhs_var, rhs_var)
  return unless @params && @ptr_relat
  return unless lhs_var.type.pointer? && rhs_var.type.pointer?

  if rhs_pointee = pointee_of(rhs_var) and
      rhs_pointee.variable? && rhs_pointee.named? &&
      rhs_pointee.scope.local? && rhs_pointee.binding.memory.static?
    if lhs_var.scope.global?
      W(assign_expr.location)
    else
      if ptr = @ptr_relat[lhs_var]
        if ptr.named? && @params.include?(ptr.name)
          W(assign_expr.location)
        end
      end
    end
  end
end
end_function(*) click to toggle source
# File lib/adlint/exam/c_builtin/cc1_check.rb, line 13558
def end_function(*)
  @params = nil
  @ptr_relat = nil
end
interpreter() click to toggle source
# File lib/adlint/exam/c_builtin/cc1_check.rb, line 13594
def interpreter
  @interp
end
relate_pointer(*, var, derefed_var) click to toggle source
# File lib/adlint/exam/c_builtin/cc1_check.rb, line 13569
def relate_pointer(*, var, derefed_var)
  if @ptr_relat
    @ptr_relat[derefed_var] = var
  end
end
start_function(*) click to toggle source
# File lib/adlint/exam/c_builtin/cc1_check.rb, line 13553
def start_function(*)
  @params = Set.new
  @ptr_relat = {}
end