Created
May 4, 2019 05:41
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### Inspect where a method is called | |
def foo(x, y) | |
p caller # Kernel#caller | |
# ... | |
end | |
### Inspect where a method is defined | |
# Where is obj.foo defined? | |
p obj.method(:foo).source_location # Method#source_location | |
### Output all methods will be called | |
trace = TracePoint.new(:call, :c_call) do |tp| | |
cls = tp.defined_class | |
m = if cls.singleton_class? | |
"#{cls.to_s[/#<Class:(.+)>/, 1]}.#{tp.method_id}" | |
else | |
"#{cls}##{tp.method_id}" | |
end | |
puts "#{m} (#{tp.path}:#{tp.lineno})" | |
end | |
trace.enable | |
# codes.... | |
trace.disable | |
### Count the number of objects on memory | |
GC.start | |
ObjectSpace.each_object(Hash).count | |
### Inspect where a global variable is overwrote | |
trace_var(:$FOO) do |newval| | |
p caller.first | |
end |
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