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8078725: method adjustments can be done just once for all classes involved into redefinition

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Walk all classes at the end of redefinition and adjust method entries and clean MethodData

Reviewed-by: sspitsyn
This commit is contained in:
Coleen Phillimore 2019-02-22 13:56:08 -05:00
parent b88c7ac223
commit 351280bbb8
10 changed files with 91 additions and 140 deletions
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12
src/hotspot/share/oops/instanceKlass.cpp
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@ -2917,22 +2917,18 @@ Method* InstanceKlass::method_at_itable(Klass* holder, int index, TRAPS) {
// not yet in the vtable due to concurrent subclass define and superinterface
// redefinition
// Note: those in the vtable, should have been updated via adjust_method_entries
void InstanceKlass::adjust_default_methods(InstanceKlass* holder, bool* trace_name_printed) {
void InstanceKlass::adjust_default_methods(bool* trace_name_printed) {
// search the default_methods for uses of either obsolete or EMCP methods
if (default_methods() != NULL) {
for (int index = 0; index < default_methods()->length(); index ++) {
Method* old_method = default_methods()->at(index);
if (old_method == NULL || old_method->method_holder() != holder || !old_method->is_old()) {
if (old_method == NULL || !old_method->is_old()) {
continue; // skip uninteresting entries
}
assert(!old_method->is_deleted(), "default methods may not be deleted");
Method* new_method = holder->method_with_idnum(old_method->orig_method_idnum());
assert(new_method != NULL, "method_with_idnum() should not be NULL");
assert(old_method != new_method, "sanity check");
Method* new_method = old_method->get_new_method();
default_methods()->at_put(index, new_method);
if (log_is_enabled(Info, redefine, class, update)) {
ResourceMark rm;
if (!(*trace_name_printed)) {