Class: Argtrace::CallStack

Inherits:
Object
  • Object
show all
Defined in:
lib/argtrace/tracer.rb

Overview

call stack of tracing targets

Instance Method Summary collapse

Constructor Details

#initialize ⇒ CallStack

Returns a new instance of CallStack.



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# File 'lib/argtrace/tracer.rb', line 15

def initialize
  # thread.object_id => stack
  @stack = Hash.new{|h,k| h[k] = []}
end

Instance Method Details

#find_by_block_location(path, lineno) ⇒ Object

find callinfo which use specific block



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# File 'lib/argtrace/tracer.rb', line 52

def find_by_block_location(path, lineno)
  id = Thread.current.object_id
  ret = []
  @stack[id].each do |info|
    if info.block_proc && info.block_proc.source_location == [path, lineno]
      ret << info
    end
  end
  return ret
end

#pop_callstack(tp) ⇒ Object 



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# File 'lib/argtrace/tracer.rb', line 28

def pop_callstack(tp)
  id = Thread.current.object_id
  ent = @stack[id].pop
  if ent
    # DEBUG:
    # p "[#{id}]<<" + " "*@stack[id].size*2 + ent.signature.to_s

    if tp.method_id != ent.signature.method_id
      raise <<~EOF
        callstack is broken
        returning by tracepoint: #{tp.defined_class}::#{tp.method_id}
        top of stack: #{ent.signature.to_s}
        rest of stack:
          #{@stack[id].map{|x| x.signature.to_s}.join("\n  ")}
      EOF
    end
    type = TypeUnion.new
    type.add(Type.new_with_value(tp.return_value))
    ent.signature.return_type = type
  end
  return ent
end

#push_callstack(callinfo) ⇒ Object 



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# File 'lib/argtrace/tracer.rb', line 20

def push_callstack(callinfo)
  id = Thread.current.object_id
  # DEBUG:
  # p "[#{id}]>>" + " "*@stack[id].size*2 + callinfo.signature.to_s

  @stack[id].push callinfo
end