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8238358: Implementation of JEP 371: Hidden Classes

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Co-authored-by: Lois Foltan <lois.foltan@oracle.com>
Co-authored-by: David Holmes <david.holmes@oracle.com>
Co-authored-by: Harold Seigel <harold.seigel@oracle.com>
Co-authored-by: Serguei Spitsyn <serguei.spitsyn@oracle.com>
Co-authored-by: Alex Buckley <alex.buckley@oracle.com>
Co-authored-by: Jamsheed Mohammed C M <jamsheed.c.m@oracle.com>
Co-authored-by: Jan Lahoda <jan.lahoda@oracle.com>
Co-authored-by: Amy Lu <amy.lu@oracle.com>
Reviewed-by: alanb, cjplummer, coleenp, dholmes, dlong, forax, jlahoda, psandoz, plevart, sspitsyn, vromero
This commit is contained in:
Mandy Chung 2020-04-21 06:55:38 -07:00
parent 642041adbc
commit 7cc1371059
198 changed files with 9526 additions and 1575 deletions
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12
src/hotspot/share/prims/jvmtiRedefineClasses.cpp
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@ -150,8 +150,8 @@ bool VM_RedefineClasses::doit_prologue() {
}
oop mirror = JNIHandles::resolve_non_null(_class_defs[i].klass);
// classes for primitives and arrays and vm unsafe anonymous classes cannot be redefined
// check here so following code can assume these classes are InstanceKlass
// classes for primitives, arrays, hidden and vm unsafe anonymous classes
// cannot be redefined.
if (!is_modifiable_class(mirror)) {
_res = JVMTI_ERROR_UNMODIFIABLE_CLASS;
return false;
@ -293,8 +293,9 @@ bool VM_RedefineClasses::is_modifiable_class(oop klass_mirror) {
return false;
}
// Cannot redefine or retransform an unsafe anonymous class.
if (InstanceKlass::cast(k)->is_unsafe_anonymous()) {
// Cannot redefine or retransform a hidden or an unsafe anonymous class.
if (InstanceKlass::cast(k)->is_hidden() ||
InstanceKlass::cast(k)->is_unsafe_anonymous()) {
return false;
}
return true;
@ -1239,11 +1240,12 @@ jvmtiError VM_RedefineClasses::load_new_class_versions(TRAPS) {
// load hook event.
state->set_class_being_redefined(the_class, _class_load_kind);
ClassLoadInfo cl_info(protection_domain);
InstanceKlass* scratch_class = SystemDictionary::parse_stream(
the_class_sym,
the_class_loader,
protection_domain,
&st,
cl_info,
THREAD);
// Clear class_being_redefined just to be sure.
state->clear_class_being_redefined();