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Bug
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Resolution: Fixed
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P2
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8, 11, 15, 16
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b17
| Issue | Fix Version | Assignee | Priority | Status | Resolution | Resolved In Build |
|---|---|---|---|---|---|---|
| JDK-8254281 | 15.0.2 | Aleksey Shipilev | P2 | Closed | Fixed | b02 |
| JDK-8254230 | 11.0.10 | Aleksey Shipilev | P2 | Resolved | Fixed | b01 |
| JDK-8255007 | openjdk8u282 | Aleksey Shipilev | P2 | Resolved | Fixed | b01 |
This happens at least on linux-zero-aarch64:
$ shipilev-jdk/build/linux-aarch64-zero-release/images/jdk/bin/java -jar jcstress-latest.jar -m quick --jvmArgs "-Xint" -sc 64 -t memeffects.basic.volatiles
org.openjdk.jcstress.tests.memeffects.basic.volatiles.volatile_byte_double [-Xint]: Observed forbidden state: 1, 0.0 (Seeing set guard, not seeing the updated value)
org.openjdk.jcstress.tests.memeffects.basic.volatiles.volatile_int_long [-Xint]: Observed forbidden state: 42, 0 (Seeing set guard, not seeing the updated value)
org.openjdk.jcstress.tests.memeffects.basic.volatiles.volatile_boolean_double [-Xint]: Observed forbidden state: true, 0.0 (Seeing set guard, not seeing the updated value)
org.openjdk.jcstress.tests.memeffects.basic.volatiles.volatile_char_long [-Xint]: Observed forbidden state: A, 0 (Seeing set guard, not seeing the updated value)
...and it seems to happen because orderAccess_linux_zero.hpp defaults to compiler-only barriers for most OrderAccess::* calls.
$ shipilev-jdk/build/linux-aarch64-zero-release/images/jdk/bin/java -jar jcstress-latest.jar -m quick --jvmArgs "-Xint" -sc 64 -t memeffects.basic.volatiles
org.openjdk.jcstress.tests.memeffects.basic.volatiles.volatile_byte_double [-Xint]: Observed forbidden state: 1, 0.0 (Seeing set guard, not seeing the updated value)
org.openjdk.jcstress.tests.memeffects.basic.volatiles.volatile_int_long [-Xint]: Observed forbidden state: 42, 0 (Seeing set guard, not seeing the updated value)
org.openjdk.jcstress.tests.memeffects.basic.volatiles.volatile_boolean_double [-Xint]: Observed forbidden state: true, 0.0 (Seeing set guard, not seeing the updated value)
org.openjdk.jcstress.tests.memeffects.basic.volatiles.volatile_char_long [-Xint]: Observed forbidden state: A, 0 (Seeing set guard, not seeing the updated value)
...and it seems to happen because orderAccess_linux_zero.hpp defaults to compiler-only barriers for most OrderAccess::* calls.
- backported by
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JDK-8254230 Zero OrderAccess barrier mappings are incorrect
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- Resolved
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- Resolved
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- Closed
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- relates to
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- Resolved
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JDK-8253036 [8u] Support building the Zero assembler port on AArch64
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- Resolved
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(2 links to)