asmhatreandClaude Sonnet 5
202f2f18a5
Adds the concurrency-interview module: a real race condition with its actual lost-update count, why volatile alone doesn't fix it, a real JVM-detected deadlock (ThreadMXBean.findDeadlockedThreads()) with the fix, and ScopedValue's exact child-thread inheritance rules (finalized in JDK 25 via JEP 506, demonstrated against StructuredTaskScope, still preview per JEP 505/525). 4 runnable demos, 1 JUnit test class (9 tests), 5 captured output transcripts. Co-Authored-By: Claude Sonnet 5 <[email protected]> Claude-Session: https://claude.ai/code/session_01FhzLY5p6okFva3qsnsRyvM
13 lines
666 B
Plaintext
13 lines
666 B
Plaintext
=== Opposite lock order: a real deadlock, detected via ThreadMXBean ===
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thread-1: holding lockA, waiting for lockB
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thread-2: holding lockB, waiting for lockA
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main: findDeadlockedThreads() detected 2 deadlocked threads
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thread-1 is blocked on java.lang.Object@5451c3a8, owned by thread-2
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thread-2 is blocked on java.lang.Object@49476842, owned by thread-1
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=== Same lock order on both threads: no deadlock possible ===
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thread-1 (fixed order): acquired both locks, done
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thread-2 (fixed order): acquired both locks, done
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main: both fixed-order threads finished, isAlive t1=false t2=false
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done (the process exits here - the two deadlocked threads above never finish)
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