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ext/objspace/lib/objspace/trace.rb: Added

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This file, when require'ed, starts tracing the object allocations, and
redefines `Kernel#p` to show the allocation site.

This commit is experimental; the library name and APIs may change.

[Feature #17762]
This commit is contained in:
Yusuke Endoh 2021-05-14 13:40:32 +09:00
parent 7cf90f99f5
commit cf1e1879f1
2 changed files with 60 additions and 0 deletions
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16
test/objspace/test_objspace.rb
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@ -616,4 +616,20 @@ class TestObjSpace < Test::Unit::TestCase
assert_not_include ObjectSpace.dump(Class.new), '"name"'
assert_not_include ObjectSpace.dump(Module.new), '"name"'
end
def test_objspace_trace
assert_in_out_err(%w[-robjspace/trace], "#{<<-"begin;"}\n#{<<-'end;'}") do |out, err|
begin;
a = "foo"
b = "b" + "a" + "r"
c = 42
p a, b, c
end;
assert_equal 3, out.size
assert_equal '"foo" @ -:2', out[0]
assert_equal '"bar" @ -:3', out[1]
assert_equal '42', out[2]
assert_equal ["objspace/trace is enabled"], err
end
end
end