Class: Trepan::Frame

Inherits:
Object
  • Object
show all
Defined in:
app/frame.rb

Overview

Call-Stack frame methods

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(dbgr, number, vm_location) ⇒ Frame

Returns a new instance of Frame.



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# File 'app/frame.rb', line 6

def initialize(dbgr, number, vm_location)
  @debugger = dbgr
  @number = number
  @vm_location = vm_location
end

Instance Attribute Details

#number ⇒ Object (readonly)

Returns the value of attribute number.



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# File 'app/frame.rb', line 12

def number
  @number
end

#vm_location ⇒ Object (readonly)

Returns the value of attribute vm_location.



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# File 'app/frame.rb', line 12

def vm_location
  @vm_location
end

Instance Method Details

#binding ⇒ Object 



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# File 'app/frame.rb', line 18

def binding
  @binding ||= Binding.setup(@vm_location.variables,
                             @vm_location.method,
                             @vm_location.static_scope)
end

#describe(opts = {}) ⇒ Object 



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# File 'app/frame.rb', line 24

def describe(opts = {})
  if method.required_args > 0
    locals = []
    0.upto(method.required_args-1) do |arg|
      locals << method.local_names[arg].to_s
    end

    arg_str = locals.join(", ")
  else
    arg_str = ""
  end

  loc = @vm_location

  if loc.is_block
    if arg_str.empty?
      recv = "{ } in #{loc.describe_receiver}#{loc.name}"
    else
      recv = "{|#{arg_str}| } in #{loc.describe_receiver}#{loc.name}"
    end
  else
    if arg_str.empty?
      recv = loc.describe
    else
      recv = "#{loc.describe}(#{arg_str})"
    end
  end

  filename = loc.method.active_path
  filename = File.basename(filename) if opts[:basename]
  str = "#{recv} at #{filename}:#{loc.line}"
  if opts[:show_ip]
    str << " (@#{loc.ip})"
  end

  str
end

#eval? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'app/frame.rb', line 95

def eval?
  static = @vm_location.static_scope
  static && static.script && static.script.eval_source
end

#eval_string ⇒ Object 



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# File 'app/frame.rb', line 100

def eval_string
  return nil unless eval?
  static = @vm_location.static_scope
  static.script.eval_source
end

#file ⇒ Object 



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# File 'app/frame.rb', line 62

def file
  @vm_location.file
end

#ip ⇒ Object 



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# File 'app/frame.rb', line 66

def ip
  @vm_location.ip
end

#line ⇒ Object 



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# File 'app/frame.rb', line 74

def line
  line_no = @vm_location.line
  line_no == 0 ? ISeq::tail_code_line(method, next_ip) : line_no
end

#local_variables ⇒ Object 



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# File 'app/frame.rb', line 79

def local_variables
  method.local_names
end

#method ⇒ Object 



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# File 'app/frame.rb', line 83

def method
  @vm_location.method
end

#next_ip ⇒ Object 



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# File 'app/frame.rb', line 70

def next_ip
  @vm_location.next_ip
end

#run(code, filename = nil) ⇒ Object 



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# File 'app/frame.rb', line 14

def run(code, filename=nil)
  eval(code, self.binding, filename)
end

#scope ⇒ Object 



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# File 'app/frame.rb', line 87

def scope
  @vm_location.variables
end

#stack_size ⇒ Object 



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# File 'app/frame.rb', line 91

def stack_size
  @debugger.vm_locations.size
end