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# frozen_string_literal: false
require_relative 'helper'
module DTrace
class TestFunctionEntry < TestCase
def test_function_entry
probe = <<-eoprobe
ruby$target:::method-entry
/arg0 && arg1 && arg2/
{
printf("%s %s %s %d\\n", copyinstr(arg0), copyinstr(arg1), copyinstr(arg2), arg3);
}
eoprobe
trap_probe(probe, ruby_program) { |d_file, rb_file, probes|
foo_calls = probes.map { |line| line.split }.find_all { |row|
row.first == 'Foo' && row[1] == 'foo'
}
assert_equal 10, foo_calls.length
line = '3'
foo_calls.each { |f| assert_equal line, f[3] }
foo_calls.each { |f| assert_equal rb_file, f[2] }
}
end
def test_function_return
probe = <<-eoprobe
ruby$target:::method-return
/arg0 && arg1 && arg2/
{
printf("%s %s %s %d\\n", copyinstr(arg0), copyinstr(arg1), copyinstr(arg2), arg3);
}
eoprobe
trap_probe(probe, ruby_program) { |d_file, rb_file, probes|
foo_calls = probes.map { |line| line.split }.find_all { |row|
row.first == 'Foo' && row[1] == 'foo'
}
assert_equal 10, foo_calls.length
line = '3'
foo_calls.each { |f| assert_equal line, f[3] }
foo_calls.each { |f| assert_equal rb_file, f[2] }
}
end
def test_return_from_raise
program = <<-eoruby
class Foo
def bar; raise; end
def baz
bar
rescue
end
end
Foo.new.baz
eoruby
probe = <<-eoprobe
ruby$target:::method-return
/arg0 && arg1 && arg2/
{
printf("%s %s %s %d\\n", copyinstr(arg0), copyinstr(arg1), copyinstr(arg2), arg3);
}
eoprobe
trap_probe(probe, program) { |d_file, rb_file, probes|
foo_calls = probes.map { |line| line.split }.find_all { |row|
row.first == 'Foo' && row[1] == 'bar'
}
assert foo_calls.any?
}
end
private
def ruby_program
<<-eoruby
TracePoint.new{}.enable
class Foo
def foo; end
end
x = Foo.new
10.times { x.foo }
eoruby
end
end
end if defined?(DTrace::TestCase)
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