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Use IO.popen to fork and exit the child process without cleanup

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Nobuyoshi Nakada 2022-07-10 13:01:04 +09:00
parent 8b98b9e274
commit a6e2f3fd8d
Notes: git 2022-07-12 19:43:35 +09:00 
Merged: https://github.com/ruby/ruby/pull/6111
1 changed files with 12 additions and 16 deletions
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24
test/-ext-/thread/test_instrumentation_api.rb
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@ -41,25 +41,21 @@ class TestThreadInstrumentation < Test::Unit::TestCase
def test_thread_instrumentation_fork_safe def test_thread_instrumentation_fork_safe
skip "No fork()" unless Process.respond_to?(:fork) skip "No fork()" unless Process.respond_to?(:fork)
read_pipe, write_pipe = IO.pipe thread_statuses = counters = nil
IO.popen("-") do |read_pipe|
pid = fork do if read_pipe
thread_statuses = Marshal.load(read_pipe)
counters = Marshal.load(read_pipe)
else
Bug::ThreadInstrumentation.reset_counters Bug::ThreadInstrumentation.reset_counters
threads = threaded_cpu_work threads = threaded_cpu_work
write_pipe.write(Marshal.dump(threads.map(&:status))) Marshal.dump(threads.map(&:status), STDOUT)
write_pipe.write(Marshal.dump(Bug::ThreadInstrumentation.counters)) Marshal.dump(Bug::ThreadInstrumentation.counters, STDOUT)
write_pipe.close
exit!(0)
end end
write_pipe.close end
_, status = Process.wait2(pid) assert_predicate $?, :success?
assert_predicate status, :success?
thread_statuses = Marshal.load(read_pipe)
assert_equal [false] * THREADS_COUNT, thread_statuses assert_equal [false] * THREADS_COUNT, thread_statuses
counters = Marshal.load(read_pipe)
read_pipe.close
counters.each do |c| counters.each do |c|
assert_predicate c, :nonzero?, "Call counters: #{counters.inspect}" assert_predicate c, :nonzero?, "Call counters: #{counters.inspect}"
end end