diff options
author | nagachika <nagachika@ruby-lang.org> | 2021-09-05 14:12:20 +0900 |
---|---|---|
committer | nagachika <nagachika@ruby-lang.org> | 2021-09-05 14:12:20 +0900 |
commit | 3fb51aec5ba7decffdfc32e540262aaae6167a95 (patch) | |
tree | 2b7db8f9f92cbf740393113360e1c19016508f41 /bootstraptest | |
parent | 911e75f0547ae3496280a731fbfd986096b0ffb6 (diff) |
merge revision(s) bbedd29b6e98ef6e3fc2ce2b358d2b509b7cd1bb: [Backport #18117]
[Bug #18117] Fix Ractor race condition with GC
rb_objspace_reachable_objects_from requires that the GC not be active.
Since the Ractor barrier is not executed for incremental sweeping,
Ractor may call rb_objspace_reachable_objects_from after sweeping
has started to share objects. This causes a crash that looks like
the following:
```
<internal:ractor>:627: [BUG] rb_objspace_reachable_objects_from() is not supported while during_gc == true
```
Co-authored-by: Vinicius Stock <vinicius.stock@shopify.com>
---
bootstraptest/test_ractor.rb | 15 +++++++++++++++
ractor.c | 12 ++++++++++--
2 files changed, 25 insertions(+), 2 deletions(-)
Diffstat (limited to 'bootstraptest')
-rw-r--r-- | bootstraptest/test_ractor.rb | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/bootstraptest/test_ractor.rb b/bootstraptest/test_ractor.rb index cbf58383c7..f733877319 100644 --- a/bootstraptest/test_ractor.rb +++ b/bootstraptest/test_ractor.rb @@ -1379,4 +1379,19 @@ assert_equal "ok", %q{ end } +# Can yield back values while GC is sweeping [Bug #18117] +assert_equal "ok", %q{ + workers = (0...8).map do + Ractor.new do + loop do + 10_000.times.map { Object.new } + Ractor.yield Time.now + end + end + end + + 1_000.times { idle_worker, tmp_reporter = Ractor.select(*workers) } + "ok" +} + end # if !ENV['GITHUB_WORKFLOW'] |