Class Ruva::Utils::PrintTracer
In: lib/ruva/utils/exec_trace.rb
Parent: Object

Prints out the execution trace of a VM as it runs. To use, pass an instance of this class to the vm, e.g. via the :trace option to Ruva::JVM.create.

Methods

new   trace  

Public Class methods

new(stream = STDOUT, show_code = true)

[Source]

    # File lib/ruva/utils/exec_trace.rb, line 12
12:       def initialize(stream = STDOUT, show_code = true)
13:         @stream = stream
14:         @code = show_code
15:         @frame = nil
16:       end

Public Instance methods

trace(frame, noperands, opnum, operands)

[Source]

    # File lib/ruva/utils/exec_trace.rb, line 18
18:       def trace(frame, noperands, opnum, operands)
19:         if frame != @frame        
20:           @frame = frame
21:           @stream.puts("In: #{frame.clz.name}.#{frame.method.name}#{frame.method.desc}")
22:         end
23:         
24:         if @code
25:           @stream.puts(sprintf("   @%-5d::%-15s -> %10s ; S: %s ; L: %s", 
26:                   frame.pc - noperands - 1, Ruva::VM::OPMAP[opnum].first, operands.inspect, 
27:                   print_stack(frame.stack), print_locals(frame.locals)))
28:         end          
29:       end

[Validate]