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Indexing classes/modules/methods
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#!/usr/bin/env ruby | |
# frozen_string_literal: true | |
VM_DEFINECLASS_TYPE_CLASS = 0x00 | |
VM_DEFINECLASS_TYPE_SINGLETON_CLASS = 0x01 | |
VM_DEFINECLASS_TYPE_MODULE = 0x02 | |
VM_DEFINECLASS_FLAG_SCOPED = 0x08 | |
VM_DEFINECLASS_FLAG_HAS_SUPERCLASS = 0x10 | |
def log(line, event, message) | |
puts "%04d %-20s %s" % [line, event, message] | |
end | |
def index(iseq, nesting = [:Object]) | |
line = iseq[9] | |
iseq[13].each_with_index do |insn, index| | |
case insn | |
in Integer | |
line = insn | |
in [:defineclass, name, class_iseq, ^(VM_DEFINECLASS_TYPE_SINGLETON_CLASS)] | |
if iseq[13][index - 2] == [:putself] | |
index(class_iseq, nesting + [name]) | |
else | |
raise NotImplementedError, "singleton class with non-self receiver" | |
end | |
in [:defineclass, name, class_iseq, flags] if flags & VM_DEFINECLASS_TYPE_MODULE > 0 | |
log(line, :"module-definition", (nesting + [name]).join("::")) | |
index(class_iseq, nesting + [name]) | |
in [:defineclass, name, class_iseq, flags] | |
log(line, :"class-definition", (nesting + [name]).join("::")) | |
index(class_iseq, nesting + [name]) | |
in [:definemethod, name, method_iseq] | |
log(line, :"method-definition", "#{nesting.join("::")}##{name}") | |
in [:definesmethod, name, method_iseq] | |
log(line, :"method-definition", (nesting + [name]).join("::")) | |
else | |
# skip other instructions | |
end | |
end | |
end | |
Dir[ARGV.first].each do |filepath| | |
puts "=== #{filepath} ===" | |
index(RubyVM::InstructionSequence.compile_file(filepath).to_a) | |
end |
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