Hi Rémy,
for which Java version and distribution is this? The docs for Java 7 and
8 are much less precise about return codes than the cited docs for Java
9. So older versions might give a generic error. The used code for
checking versions is in the HotSpot sources for version 8 inside
hotspot/src/share/vm/runtime/thread.cpp (functions
Threads::is_supported_jni_version_including_1_1 and
Threads::is_supported_jni_version):
jboolean Threads::is_supported_jni_version_including_1_1(jint version) {
if (version == JNI_VERSION_1_1) return JNI_TRUE;
return is_supported_jni_version(version);
}
It is called from hotspot/src/share/vm/prims/jni.cpp in jni_GetEnv().
I don't see a code path returning -1 in the version I am looking at
(outdated Java 8 source code).
What is rather special about that environment w.r.t. platform/JVM/Arch
or so?
Regards,
Rainer
Am 10.07.2019 um 20:42 schrieb Rémy Maucherat:
Hi,
I'm a bit stumped there, as I'm trying to get native to work in that
rather special environment.
JNI_OnLoad fails with:
WARNING: The APR based Apache Tomcat Native library failed to load. The
error reported was [Unsupported JNI version 0xffffffff, required by
bin/libtcnative-1.so.0.2.23]
java.lang.UnsatisfiedLinkError: Unsupported JNI version 0xffffffff,
required by bin/libtcnative-1.so.0.2.23
at
com.oracle.svm.jni.JNILibraryInitializer.initialize(JNILibraryLoadFeature.java:87)
at
com.oracle.svm.core.jdk.NativeLibrarySupport.loadLibrary0(NativeLibrarySupport.java:153)
at
com.oracle.svm.core.jdk.NativeLibrarySupport.loadLibrary(NativeLibrarySupport.java:98)
at java.lang.ClassLoader.loadLibrary(Target_java_lang_ClassLoader.java:126)
at java.lang.Runtime.load0(Runtime.java:809)
at java.lang.Runtime.load(Runtime.java:241)
at java.lang.System.load(System.java:366)
at org.apache.tomcat.jni.Library.<init>(Library.java:42)
Although this looks weird, this is actually returning -1 and it's normal
when it fails [it's a bad error message]. Most likely this doesn't work:
if ((*vm)->GetEnv(vm, &ppe, JNI_VERSION_1_4)) {
return JNI_ERR;
}
Any ideas ?
Rémy
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