require 'test/unit' require '-test-/tracepoint' class TestTracepointObj < Test::Unit::TestCase def test_not_available_from_ruby assert_raises ArgumentError do TracePoint.trace(:obj_new){} end end def test_tracks_objspace_events result = Bug.tracepoint_track_objspace_events{ 99 'abc' v="foobar" Object.new nil } newobj_count, free_count, gc_start_count, gc_end_count, *newobjs = *result assert_equal 2, newobj_count assert_equal 2, newobjs.size assert_equal 'foobar', newobjs[0] assert_equal Object, newobjs[1].class stat1 = {} stat2 = {} GC.stat(stat1) result = Bug.tracepoint_track_objspace_events{ 1_000_000.times{''} } GC.stat(stat2) newobj_count, free_count, gc_start_count, gc_end_count, *newobjs = *result assert_operator stat2[:total_allocated_object] - stat1[:total_allocated_object], :>=, newobj_count assert_operator 1_000_000, :<=, newobj_count assert_operator stat2[:total_freed_object] - stat1[:total_freed_object], :>=, free_count assert_operator stat2[:count] - stat1[:count], :==, gc_start_count assert_operator gc_start_count, :>=, gc_end_count assert_operator stat2[:count] - stat1[:count] - 1, :<=, gc_end_count end end