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8185348: Major performance regression in GetMethodDeclaringClass and other JVMTI Method functions #656

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8185348: Major performance regression in GetMethodDeclaringClass and other JVMTI Method functions #656

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8348228: Major performance regression in GetMethodDeclaringClass and …
May 30, 2025
44c3342
Merge branch 'master' into JDK-8348228
zhengyu123 Aug 5, 2025
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3 changes: 0 additions & 3 deletions hotspot/src/share/vm/oops/method.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1903,9 +1903,6 @@ bool Method::is_method_id(jmethodID mid) {

Method* Method::checked_resolve_jmethod_id(jmethodID mid) {
if (mid == NULL) return NULL;
if (!Method::is_method_id(mid)) {
return NULL;
}
Method* o = resolve_jmethod_id(mid);
if (o == NULL || o == JNIMethodBlock::_free_method || !((Metadata*)o)->is_method()) {
return NULL;
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5 changes: 5 additions & 0 deletions hotspot/src/share/vm/prims/jniCheck.cpp
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Expand Up @@ -468,6 +468,11 @@ Method* jniCheck::validate_jmethod_id(JavaThread* thr, jmethodID method_id) {
if (moop == NULL) {
ReportJNIFatalError(thr, fatal_wrong_class_or_method);
}
// jmethodIDs are supposed to be weak handles in the class loader data,
// but that can be expensive so check it last
else if (!Method::is_method_id(method_id)) {
ReportJNIFatalError(thr, fatal_non_weak_method);
}
return moop;
}

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