asmhatre
f548d9eeb5
Runnable jcstress + JUnit companion for the ankurm.com post on the Java Memory Model, double-checked locking, and the volatile fix.
43 lines
1.7 KiB
Bash
Executable File
43 lines
1.7 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Regenerates every file in output/. Run from the jmm/ directory after `mvn package`.
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#
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# Needs a JDK 25 on PATH (or set JAVA_HOME below) - jcstress-core 0.16's annotation
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# processor is NOT auto-discovered by javac on JDK 25 without -processorpath, which is
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# why the pom's <annotationProcessorPaths> block exists; see output/04-*.txt.
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#
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# The three jcstress runs below use a fixed, non-default JVM config (-jvmArgs) on
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# purpose: without it, jcstress auto-detects and iterates over several compiler-flag
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# combinations, multiplying the number of forked JVMs far past what this sandbox's
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# 2 CPUs can get through in a reasonable time. -f 2 -iters 15 -time 1000 with a fixed
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# JVM config took about 4m45s per test on that hardware.
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set -euo pipefail
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cd "$(dirname "$0")/.."
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JAR=target/jcstress.jar
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[ -f "$JAR" ] || { echo "Run 'mvn package' first."; exit 1; }
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run_test() {
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local test_class="$1" out_file="$2"
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echo "==> $test_class"
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{
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echo "\$ java -jar target/jcstress.jar -t $test_class -jvmArgs \"-Xmx256m\" -f 2 -iters 15 -time 1000"
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echo
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} > "$out_file"
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java -jar "$JAR" -t "$test_class" -jvmArgs "-Xmx256m" -f 2 -iters 15 -time 1000 -v 2>/dev/null \
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| awk '/^RUN RESULTS:/{p=1} p==1 && /VM error stream:/{exit} p' >> "$out_file"
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}
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run_test PlainPublicationTest output/01-plain-publication.txt
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run_test VolatilePublicationTest output/02-volatile-publication.txt
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run_test FinalFieldPublicationTest output/03-final-field-publication.txt
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echo "==> SingletonBehaviorTest (JUnit)"
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mvn -q test
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{
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echo '$ mvn -q test'
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echo
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cat target/surefire-reports/com.ankurm.jmm.SingletonBehaviorTest.txt
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} > output/05-singleton-behavior.txt
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echo "Done. output/ regenerated."
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