--- a/hotspot/src/share/vm/prims/jvmtiRedefineClasses.cpp Fri Feb 01 13:30:12 2013 -0500
+++ b/hotspot/src/share/vm/prims/jvmtiRedefineClasses.cpp Fri Feb 01 14:42:43 2013 -0800
@@ -278,76 +278,23 @@
case JVM_CONSTANT_NameAndType:
{
int name_ref_i = scratch_cp->name_ref_index_at(scratch_i);
- int new_name_ref_i = 0;
- bool match = (name_ref_i < *merge_cp_length_p) &&
- scratch_cp->compare_entry_to(name_ref_i, *merge_cp_p, name_ref_i,
- THREAD);
- if (!match) {
- // forward reference in *merge_cp_p or not a direct match
-
- int found_i = scratch_cp->find_matching_entry(name_ref_i, *merge_cp_p,
- THREAD);
- if (found_i != 0) {
- guarantee(found_i != name_ref_i,
- "compare_entry_to() and find_matching_entry() do not agree");
-
- // Found a matching entry somewhere else in *merge_cp_p so
- // just need a mapping entry.
- new_name_ref_i = found_i;
- map_index(scratch_cp, name_ref_i, found_i);
- } else {
- // no match found so we have to append this entry to *merge_cp_p
- append_entry(scratch_cp, name_ref_i, merge_cp_p, merge_cp_length_p,
- THREAD);
- // The above call to append_entry() can only append one entry
- // so the post call query of *merge_cp_length_p is only for
- // the sake of consistency.
- new_name_ref_i = *merge_cp_length_p - 1;
- }
- }
+ int new_name_ref_i = find_or_append_indirect_entry(scratch_cp, name_ref_i, merge_cp_p,
+ merge_cp_length_p, THREAD);
int signature_ref_i = scratch_cp->signature_ref_index_at(scratch_i);
- int new_signature_ref_i = 0;
- match = (signature_ref_i < *merge_cp_length_p) &&
- scratch_cp->compare_entry_to(signature_ref_i, *merge_cp_p,
- signature_ref_i, THREAD);
- if (!match) {
- // forward reference in *merge_cp_p or not a direct match
-
- int found_i = scratch_cp->find_matching_entry(signature_ref_i,
- *merge_cp_p, THREAD);
- if (found_i != 0) {
- guarantee(found_i != signature_ref_i,
- "compare_entry_to() and find_matching_entry() do not agree");
-
- // Found a matching entry somewhere else in *merge_cp_p so
- // just need a mapping entry.
- new_signature_ref_i = found_i;
- map_index(scratch_cp, signature_ref_i, found_i);
- } else {
- // no match found so we have to append this entry to *merge_cp_p
- append_entry(scratch_cp, signature_ref_i, merge_cp_p,
- merge_cp_length_p, THREAD);
- // The above call to append_entry() can only append one entry
- // so the post call query of *merge_cp_length_p is only for
- // the sake of consistency.
- new_signature_ref_i = *merge_cp_length_p - 1;
- }
- }
+ int new_signature_ref_i = find_or_append_indirect_entry(scratch_cp, signature_ref_i,
+ merge_cp_p, merge_cp_length_p,
+ THREAD);
// If the referenced entries already exist in *merge_cp_p, then
// both new_name_ref_i and new_signature_ref_i will both be 0.
// In that case, all we are appending is the current entry.
- if (new_name_ref_i == 0) {
- new_name_ref_i = name_ref_i;
- } else {
+ if (new_name_ref_i != name_ref_i) {
RC_TRACE(0x00080000,
("NameAndType entry@%d name_ref_index change: %d to %d",
*merge_cp_length_p, name_ref_i, new_name_ref_i));
}
- if (new_signature_ref_i == 0) {
- new_signature_ref_i = signature_ref_i;
- } else {
+ if (new_signature_ref_i != signature_ref_i) {
RC_TRACE(0x00080000,
("NameAndType entry@%d signature_ref_index change: %d to %d",
*merge_cp_length_p, signature_ref_i, new_signature_ref_i));
@@ -369,76 +316,12 @@
case JVM_CONSTANT_Methodref:
{
int klass_ref_i = scratch_cp->uncached_klass_ref_index_at(scratch_i);
- int new_klass_ref_i = 0;
- bool match = (klass_ref_i < *merge_cp_length_p) &&
- scratch_cp->compare_entry_to(klass_ref_i, *merge_cp_p, klass_ref_i,
- THREAD);
- if (!match) {
- // forward reference in *merge_cp_p or not a direct match
-
- int found_i = scratch_cp->find_matching_entry(klass_ref_i, *merge_cp_p,
- THREAD);
- if (found_i != 0) {
- guarantee(found_i != klass_ref_i,
- "compare_entry_to() and find_matching_entry() do not agree");
-
- // Found a matching entry somewhere else in *merge_cp_p so
- // just need a mapping entry.
- new_klass_ref_i = found_i;
- map_index(scratch_cp, klass_ref_i, found_i);
- } else {
- // no match found so we have to append this entry to *merge_cp_p
- append_entry(scratch_cp, klass_ref_i, merge_cp_p, merge_cp_length_p,
- THREAD);
- // The above call to append_entry() can only append one entry
- // so the post call query of *merge_cp_length_p is only for
- // the sake of consistency. Without the optimization where we
- // use JVM_CONSTANT_UnresolvedClass, then up to two entries
- // could be appended.
- new_klass_ref_i = *merge_cp_length_p - 1;
- }
- }
-
- int name_and_type_ref_i =
- scratch_cp->uncached_name_and_type_ref_index_at(scratch_i);
- int new_name_and_type_ref_i = 0;
- match = (name_and_type_ref_i < *merge_cp_length_p) &&
- scratch_cp->compare_entry_to(name_and_type_ref_i, *merge_cp_p,
- name_and_type_ref_i, THREAD);
- if (!match) {
- // forward reference in *merge_cp_p or not a direct match
-
- int found_i = scratch_cp->find_matching_entry(name_and_type_ref_i,
- *merge_cp_p, THREAD);
- if (found_i != 0) {
- guarantee(found_i != name_and_type_ref_i,
- "compare_entry_to() and find_matching_entry() do not agree");
-
- // Found a matching entry somewhere else in *merge_cp_p so
- // just need a mapping entry.
- new_name_and_type_ref_i = found_i;
- map_index(scratch_cp, name_and_type_ref_i, found_i);
- } else {
- // no match found so we have to append this entry to *merge_cp_p
- append_entry(scratch_cp, name_and_type_ref_i, merge_cp_p,
- merge_cp_length_p, THREAD);
- // The above call to append_entry() can append more than
- // one entry so the post call query of *merge_cp_length_p
- // is required in order to get the right index for the
- // JVM_CONSTANT_NameAndType entry.
- new_name_and_type_ref_i = *merge_cp_length_p - 1;
- }
- }
-
- // If the referenced entries already exist in *merge_cp_p, then
- // both new_klass_ref_i and new_name_and_type_ref_i will both be
- // 0. In that case, all we are appending is the current entry.
- if (new_klass_ref_i == 0) {
- new_klass_ref_i = klass_ref_i;
- }
- if (new_name_and_type_ref_i == 0) {
- new_name_and_type_ref_i = name_and_type_ref_i;
- }
+ int new_klass_ref_i = find_or_append_indirect_entry(scratch_cp, klass_ref_i,
+ merge_cp_p, merge_cp_length_p, THREAD);
+
+ int name_and_type_ref_i = scratch_cp->uncached_name_and_type_ref_index_at(scratch_i);
+ int new_name_and_type_ref_i = find_or_append_indirect_entry(scratch_cp, name_and_type_ref_i,
+ merge_cp_p, merge_cp_length_p, THREAD);
const char *entry_name;
switch (scratch_cp->tag_at(scratch_i).value()) {
@@ -481,6 +364,72 @@
(*merge_cp_length_p)++;
} break;
+ // this is an indirect CP entry so it needs special handling
+ case JVM_CONSTANT_MethodType:
+ {
+ int ref_i = scratch_cp->method_type_index_at(scratch_i);
+ int new_ref_i = find_or_append_indirect_entry(scratch_cp, ref_i, merge_cp_p,
+ merge_cp_length_p, THREAD);
+ if (new_ref_i != ref_i) {
+ RC_TRACE(0x00080000,
+ ("MethodType entry@%d ref_index change: %d to %d",
+ *merge_cp_length_p, ref_i, new_ref_i));
+ }
+ (*merge_cp_p)->method_type_index_at_put(*merge_cp_length_p, new_ref_i);
+ if (scratch_i != *merge_cp_length_p) {
+ // The new entry in *merge_cp_p is at a different index than
+ // the new entry in scratch_cp so we need to map the index values.
+ map_index(scratch_cp, scratch_i, *merge_cp_length_p);
+ }
+ (*merge_cp_length_p)++;
+ } break;
+
+ // this is an indirect CP entry so it needs special handling
+ case JVM_CONSTANT_MethodHandle:
+ {
+ int ref_kind = scratch_cp->method_handle_ref_kind_at(scratch_i);
+ int ref_i = scratch_cp->method_handle_index_at(scratch_i);
+ int new_ref_i = find_or_append_indirect_entry(scratch_cp, ref_i, merge_cp_p,
+ merge_cp_length_p, THREAD);
+ if (new_ref_i != ref_i) {
+ RC_TRACE(0x00080000,
+ ("MethodHandle entry@%d ref_index change: %d to %d",
+ *merge_cp_length_p, ref_i, new_ref_i));
+ }
+ (*merge_cp_p)->method_handle_index_at_put(*merge_cp_length_p, ref_kind, new_ref_i);
+ if (scratch_i != *merge_cp_length_p) {
+ // The new entry in *merge_cp_p is at a different index than
+ // the new entry in scratch_cp so we need to map the index values.
+ map_index(scratch_cp, scratch_i, *merge_cp_length_p);
+ }
+ (*merge_cp_length_p)++;
+ } break;
+
+ // this is an indirect CP entry so it needs special handling
+ case JVM_CONSTANT_InvokeDynamic:
+ {
+ // TBD: cross-checks and possible extra appends into CP and bsm operands
+ // are needed as well. This issue is tracked by a separate bug 8007037.
+ int bss_idx = scratch_cp->invoke_dynamic_bootstrap_specifier_index(scratch_i);
+
+ int ref_i = scratch_cp->invoke_dynamic_name_and_type_ref_index_at(scratch_i);
+ int new_ref_i = find_or_append_indirect_entry(scratch_cp, ref_i, merge_cp_p,
+ merge_cp_length_p, THREAD);
+ if (new_ref_i != ref_i) {
+ RC_TRACE(0x00080000,
+ ("InvokeDynamic entry@%d name_and_type ref_index change: %d to %d",
+ *merge_cp_length_p, ref_i, new_ref_i));
+ }
+
+ (*merge_cp_p)->invoke_dynamic_at_put(*merge_cp_length_p, bss_idx, new_ref_i);
+ if (scratch_i != *merge_cp_length_p) {
+ // The new entry in *merge_cp_p is at a different index than
+ // the new entry in scratch_cp so we need to map the index values.
+ map_index(scratch_cp, scratch_i, *merge_cp_length_p);
+ }
+ (*merge_cp_length_p)++;
+ } break;
+
// At this stage, Class or UnresolvedClass could be here, but not
// ClassIndex
case JVM_CONSTANT_ClassIndex: // fall through
@@ -507,6 +456,35 @@
} // end append_entry()
+int VM_RedefineClasses::find_or_append_indirect_entry(constantPoolHandle scratch_cp,
+ int ref_i, constantPoolHandle *merge_cp_p, int *merge_cp_length_p, TRAPS) {
+
+ int new_ref_i = ref_i;
+ bool match = (ref_i < *merge_cp_length_p) &&
+ scratch_cp->compare_entry_to(ref_i, *merge_cp_p, ref_i, THREAD);
+
+ if (!match) {
+ // forward reference in *merge_cp_p or not a direct match
+ int found_i = scratch_cp->find_matching_entry(ref_i, *merge_cp_p, THREAD);
+ if (found_i != 0) {
+ guarantee(found_i != ref_i, "compare_entry_to() and find_matching_entry() do not agree");
+ // Found a matching entry somewhere else in *merge_cp_p so just need a mapping entry.
+ new_ref_i = found_i;
+ map_index(scratch_cp, ref_i, found_i);
+ } else {
+ // no match found so we have to append this entry to *merge_cp_p
+ append_entry(scratch_cp, ref_i, merge_cp_p, merge_cp_length_p, THREAD);
+ // The above call to append_entry() can only append one entry
+ // so the post call query of *merge_cp_length_p is only for
+ // the sake of consistency.
+ new_ref_i = *merge_cp_length_p - 1;
+ }
+ }
+
+ return new_ref_i;
+} // end find_or_append_indirect_entry()
+
+
void VM_RedefineClasses::swap_all_method_annotations(int i, int j, instanceKlassHandle scratch_class, TRAPS) {
AnnotationArray* save;
@@ -1564,6 +1542,7 @@
case Bytecodes::_getfield : // fall through
case Bytecodes::_getstatic : // fall through
case Bytecodes::_instanceof : // fall through
+ case Bytecodes::_invokedynamic : // fall through
case Bytecodes::_invokeinterface: // fall through
case Bytecodes::_invokespecial : // fall through
case Bytecodes::_invokestatic : // fall through