JDK-8198531 : C2: Wrong type of return value of Unsafe.getAndSetObject() call
- Type: Bug
- Component: hotspot
- Sub-Component: compiler
- Affected Version: 8u161,9,10,11
- Priority: P2
- Status: Closed
- Resolution: Duplicate
- Submitted: 2018-02-21
- Updated: 2018-02-22
- Resolved: 2018-02-22
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| JDK 11 |
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11Resolved  |
Related Reports
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Duplicate :
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Description
Sometimes C2 eliminates non-null branch in the following code as if it proved that ThreadCont.getAndSet() can't return non-null:
val cont = ThreadCont.getAndSet(threads[i], null)
if (cont != null) { /* do something */ }
Detailed problem description & reproducer (by Roman Elizarov):
https://github.com/ktorio/ktor/blob/resumeAnyThread_HotSpotBug/BUG_README_FIRST.md
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