8068162: jvmtiRedefineClasses.cpp: guarantee(false) failed: OLD and/or OBSOLETE method(s) found
Summary: adjust Unsafe methods in the itable/vtable if Unsafe is redefined
Reviewed-by: coleenp, dcubed
Contributed-by: serguei.spitsyn@oracle.com
--- a/hotspot/src/share/vm/memory/universe.cpp Mon Jan 12 09:16:06 2015 +0100
+++ b/hotspot/src/share/vm/memory/universe.cpp Mon Jan 26 15:51:28 2015 -0800
@@ -115,6 +115,7 @@
LatestMethodCache* Universe::_finalizer_register_cache = NULL;
LatestMethodCache* Universe::_loader_addClass_cache = NULL;
LatestMethodCache* Universe::_pd_implies_cache = NULL;
+LatestMethodCache* Universe::_throw_illegal_access_error_cache = NULL;
oop Universe::_out_of_memory_error_java_heap = NULL;
oop Universe::_out_of_memory_error_metaspace = NULL;
oop Universe::_out_of_memory_error_class_metaspace = NULL;
@@ -130,7 +131,6 @@
oop Universe::_vm_exception = NULL;
oop Universe::_allocation_context_notification_obj = NULL;
-Method* Universe::_throw_illegal_access_error = NULL;
Array<int>* Universe::_the_empty_int_array = NULL;
Array<u2>* Universe::_the_empty_short_array = NULL;
Array<Klass*>* Universe::_the_empty_klass_array = NULL;
@@ -236,6 +236,7 @@
_finalizer_register_cache->serialize(f);
_loader_addClass_cache->serialize(f);
_pd_implies_cache->serialize(f);
+ _throw_illegal_access_error_cache->serialize(f);
}
void Universe::check_alignment(uintx size, uintx alignment, const char* name) {
@@ -664,6 +665,7 @@
Universe::_finalizer_register_cache = new LatestMethodCache();
Universe::_loader_addClass_cache = new LatestMethodCache();
Universe::_pd_implies_cache = new LatestMethodCache();
+ Universe::_throw_illegal_access_error_cache = new LatestMethodCache();
if (UseSharedSpaces) {
// Read the data structures supporting the shared spaces (shared
@@ -1016,7 +1018,8 @@
tty->print_cr("Unable to link/verify Unsafe.throwIllegalAccessError method");
return false; // initialization failed (cannot throw exception yet)
}
- Universe::_throw_illegal_access_error = m;
+ Universe::_throw_illegal_access_error_cache->init(
+ SystemDictionary::misc_Unsafe_klass(), m);
// Setup method for registering loaded classes in class loader vector
InstanceKlass::cast(SystemDictionary::ClassLoader_klass())->link_class(CHECK_false);
@@ -1042,7 +1045,7 @@
return false; // initialization failed
}
Universe::_pd_implies_cache->init(
- SystemDictionary::ProtectionDomain_klass(), m);;
+ SystemDictionary::ProtectionDomain_klass(), m);
}
// This needs to be done before the first scavenge/gc, since
--- a/hotspot/src/share/vm/memory/universe.hpp Mon Jan 12 09:16:06 2015 +0100
+++ b/hotspot/src/share/vm/memory/universe.hpp Mon Jan 26 15:51:28 2015 -0800
@@ -148,8 +148,7 @@
static LatestMethodCache* _finalizer_register_cache; // static method for registering finalizable objects
static LatestMethodCache* _loader_addClass_cache; // method for registering loaded classes in class loader vector
static LatestMethodCache* _pd_implies_cache; // method for checking protection domain attributes
-
- static Method* _throw_illegal_access_error;
+ static LatestMethodCache* _throw_illegal_access_error_cache; // Unsafe.throwIllegalAccessError() method
// preallocated error objects (no backtrace)
static oop _out_of_memory_error_java_heap;
@@ -305,6 +304,7 @@
static Method* loader_addClass_method() { return _loader_addClass_cache->get_method(); }
static Method* protection_domain_implies_method() { return _pd_implies_cache->get_method(); }
+ static Method* throw_illegal_access_error() { return _throw_illegal_access_error_cache->get_method(); }
static oop null_ptr_exception_instance() { return _null_ptr_exception_instance; }
static oop arithmetic_exception_instance() { return _arithmetic_exception_instance; }
@@ -314,8 +314,6 @@
static inline oop allocation_context_notification_obj();
static inline void set_allocation_context_notification_obj(oop obj);
- static Method* throw_illegal_access_error() { return _throw_illegal_access_error; }
-
static Array<int>* the_empty_int_array() { return _the_empty_int_array; }
static Array<u2>* the_empty_short_array() { return _the_empty_short_array; }
static Array<Method*>* the_empty_method_array() { return _the_empty_method_array; }
--- a/hotspot/src/share/vm/prims/jvmtiRedefineClasses.cpp Mon Jan 12 09:16:06 2015 +0100
+++ b/hotspot/src/share/vm/prims/jvmtiRedefineClasses.cpp Mon Jan 26 15:51:28 2015 -0800
@@ -3376,7 +3376,9 @@
// not yet in the vtable, because the vtable setup is in progress.
// This must be done after we adjust the default_methods and
// default_vtable_indices for methods already in the vtable.
+ // If redefining Unsafe, walk all the vtables looking for entries.
if (ik->vtable_length() > 0 && (_the_class_oop->is_interface()
+ || _the_class_oop == SystemDictionary::misc_Unsafe_klass()
|| ik->is_subtype_of(_the_class_oop))) {
// ik->vtable() creates a wrapper object; rm cleans it up
ResourceMark rm(_thread);
@@ -3396,7 +3398,9 @@
// interface, then we have to call adjust_method_entries() for
// every InstanceKlass that has an itable since there isn't a
// subclass relationship between an interface and an InstanceKlass.
+ // If redefining Unsafe, walk all the itables looking for entries.
if (ik->itable_length() > 0 && (_the_class_oop->is_interface()
+ || _the_class_oop == SystemDictionary::misc_Unsafe_klass()
|| ik->is_subclass_of(_the_class_oop))) {
// ik->itable() creates a wrapper object; rm cleans it up
ResourceMark rm(_thread);