Backport #5661 ยป 0001-random.c-random_s_rand-avoid-segfault-after-fork-rub.patch
| random.c | ||
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| 1295 | 1295 |
static VALUE |
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random_s_rand(int argc, VALUE *argv, VALUE obj) |
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{
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rand_start(&default_rand); |
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return random_rand(argc, argv, rb_Random_DEFAULT); |
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} |
| 1300 | 1302 | |
| test/ruby/test_rand.rb | ||
|---|---|---|
| 423 | 423 |
rescue NotImplementedError, ArgumentError |
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end |
| 425 | 425 | |
| 426 |
def fork_check(op = nil, &block) |
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r, w = IO.pipe |
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p1 = fork { w.puts(block.call.to_s) }
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_, st = Process.waitpid2(p1) |
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assert st.success?, st.inspect |
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r1 = r.gets |
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p2 = fork { w.puts(block.call.to_s) }
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_, st = Process.waitpid2(p2) |
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assert st.success?, st.inspect |
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r2 = r.gets |
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# technically, it *is* possible to fail this test _very_ rarely... |
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assert_operator(r1.strip, op, r2.strip) if op |
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rescue NotImplementedError |
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ensure |
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r.close if r |
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w.close if w |
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end |
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def test_rand_reseed_on_fork |
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# Bug 5661 / [ruby-core:41209] |
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fork_check { Random.rand(4) }
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fork_check(:!=) { Random.rand }
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fork_check { rand(4) }
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fork_check(:!=) { rand }
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stable = Random.new |
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fork_check(:==) { stable.rand(4) }
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fork_check(:==) { stable.rand }
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end |
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| 426 | 458 |
def test_seed |
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bug3104 = '[ruby-core:29292]' |
| 428 | 460 |
rand_1 = Random.new(-1).rand |