23100179662

Committed 15 Mar 2026 01:00AM UTC coverage: 86.207% (-0.08%) from 86.288%

Build # 23100179662

Build Type

push

github

Committed by

FlysonBot

Commit Message

fix: JVM's default GC has memory tagging bug when running on Android with MTE enabled

Coverage Stats

2 of 3 new or added lines in 1 file covered. (66.67%)

625 of 725 relevant lines covered (86.21%)

0.86 hits per line

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66.67

/src/main/python/mastermind/jvm.py

import jpype
from mastermind.java_setup import ensure_ready

jre, jar = ensure_ready()

if jre is None:
    # Android/Termux: use the system JDK's libjvm directly
    import glob

    matches = glob.glob(
        "/data/data/com.termux/files/usr/lib/jvm/java-21-openjdk*/lib/server/libjvm.so"
    )
    if not matches:
        raise RuntimeError("libjvm.so not found. Is openjdk-21 installed via pkg?")

    jvmpath = matches[0]

else:
    jvmpath = str(jre / "lib" / "server" / "libjvm.so")

_jvm_flags = ["-Xlog:os+container=off"]
if jre is None:
    # Android/Termux: SerialGC avoids pointer-tagging conflicts with MTE on ARM64
    _jvm_flags.append("-XX:+UseSerialGC")

jpype.startJVM(
    *_jvm_flags,
    jvmpath=jvmpath,
    classpath=[str(jar)],
    convertStrings=False,
)

MastermindSession = jpype.JClass("org.mastermind.MastermindSession")
ConvertCode = jpype.JClass("org.mastermind.codes.ConvertCode")
ExpectedSize = jpype.JClass("org.mastermind.compute.ExpectedSize")
Feedback = jpype.JClass("org.mastermind.compute.Feedback")

1	import jpype	1✔
2	from mastermind.java_setup import ensure_ready	1✔
3
4	jre, jar = ensure_ready()	1✔
5
6	if jre is None:	1✔
7	# Android/Termux: use the system JDK's libjvm directly
8	import glob	×
9
10	matches = glob.glob(	×
11	"/data/data/com.termux/files/usr/lib/jvm/java-21-openjdk*/lib/server/libjvm.so"
12	)
13	if not matches:	×
14	raise RuntimeError("libjvm.so not found. Is openjdk-21 installed via pkg?")	×
15
16	jvmpath = matches[0]	×
17
18	else:
19	jvmpath = str(jre / "lib" / "server" / "libjvm.so")	1✔
20
21	_jvm_flags = ["-Xlog:os+container=off"]	1✔
22	if jre is None:	1✔
23	# Android/Termux: SerialGC avoids pointer-tagging conflicts with MTE on ARM64
NEW 24	_jvm_flags.append("-XX:+UseSerialGC")	×
25
26	jpype.startJVM(	1✔
27	*_jvm_flags,
28	jvmpath=jvmpath,
29	classpath=[str(jar)],
30	convertStrings=False,
31	)
32
33	MastermindSession = jpype.JClass("org.mastermind.MastermindSession")	1✔
34	ConvertCode = jpype.JClass("org.mastermind.codes.ConvertCode")	1✔
35	ExpectedSize = jpype.JClass("org.mastermind.compute.ExpectedSize")	1✔
36	Feedback = jpype.JClass("org.mastermind.compute.Feedback")	1✔

FlysonBot / Mastermind / 23100179662

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