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|
module TracePointChecker
STATE = {
count: 0,
running: false,
}
module ZombieTraceHunter
def before_setup
@tracepoint_captured_stat = TracePoint.stat.map{|k, (activated, _deleted)| [k, activated]}
super
end
def after_teardown
super
# detect zombie traces.
assert_equal(
@tracepoint_captured_stat,
TracePoint.stat.map{|k, (activated, _deleted)| [k, activated]},
"The number of active trace events was changed"
)
# puts "TracePoint - deleted: #{deleted}" if deleted > 0
TracePointChecker.check if STATE[:running]
end
end
MAIN_THREAD = Thread.current
TRACES = []
def self.prefix event
case event
when :call, :return
:n
when :c_call, :c_return
:c
when :b_call, :b_return
:b
end
end
def self.clear_call_stack
Thread.current[:call_stack] = []
end
def self.call_stack
stack = Thread.current[:call_stack]
stack = clear_call_stack unless stack
stack
end
def self.verbose_out label, method
puts label => call_stack, :count => STATE[:count], :method => method
end
def self.method_label tp
"#{prefix(tp.event)}##{tp.method_id}"
end
def self.start verbose: false, stop_at_failure: false
call_events = %i(a_call)
return_events = %i(a_return)
clear_call_stack
STATE[:running] = true
TRACES << TracePoint.new(*call_events){|tp|
next if Thread.current != MAIN_THREAD
method = method_label(tp)
call_stack.push method
STATE[:count] += 1
verbose_out :psuh, method if verbose
}
TRACES << TracePoint.new(*return_events){|tp|
next if Thread.current != MAIN_THREAD
STATE[:count] += 1
method = "#{prefix(tp.event)}##{tp.method_id}"
verbose_out :pop1, method if verbose
stored_method = call_stack.pop
next if stored_method.nil?
verbose_out :pop2, method if verbose
if stored_method != method
stop if stop_at_failure
RubyVM::SDR() if defined? RubyVM::SDR()
call_stack.clear
raise "#{stored_method} is expected, but #{method} (count: #{STATE[:count]})"
end
}
TRACES.each{|trace| trace.enable}
end
def self.stop
STATE[:running] = true
TRACES.each{|trace| trace.disable}
TRACES.clear
end
def self.check
TRACES.each{|trace|
raise "trace #{trace} should not be deactivated" unless trace.enabled?
}
end
end
class ::Test::Unit::TestCase
include TracePointChecker::ZombieTraceHunter
end
# TracePointChecker.start verbose: false
|
