--- a/hotspot/src/share/vm/prims/jvmtiRedefineClasses.cpp Wed Oct 22 02:31:25 2014 -0700
+++ b/hotspot/src/share/vm/prims/jvmtiRedefineClasses.cpp Wed Oct 22 13:59:56 2014 +0200
@@ -1569,6 +1569,29 @@
return false;
}
+ // rewrite constant pool references in the class_type_annotations:
+ if (!rewrite_cp_refs_in_class_type_annotations(scratch_class, THREAD)) {
+ // propagate failure back to caller
+ return false;
+ }
+
+ // rewrite constant pool references in the fields_type_annotations:
+ if (!rewrite_cp_refs_in_fields_type_annotations(scratch_class, THREAD)) {
+ // propagate failure back to caller
+ return false;
+ }
+
+ // rewrite constant pool references in the methods_type_annotations:
+ if (!rewrite_cp_refs_in_methods_type_annotations(scratch_class, THREAD)) {
+ // propagate failure back to caller
+ return false;
+ }
+
+ // There can be type annotations in the Code part of a method_info attribute.
+ // These annotations are not accessible, even by reflection.
+ // Currently they are not even parsed by the ClassFileParser.
+ // If runtime access is added they will also need to be rewritten.
+
// rewrite source file name index:
u2 source_file_name_idx = scratch_class->source_file_name_index();
if (source_file_name_idx != 0) {
@@ -2239,6 +2262,588 @@
} // end rewrite_cp_refs_in_methods_default_annotations()
+// Rewrite constant pool references in a class_type_annotations field.
+bool VM_RedefineClasses::rewrite_cp_refs_in_class_type_annotations(
+ instanceKlassHandle scratch_class, TRAPS) {
+
+ AnnotationArray* class_type_annotations = scratch_class->class_type_annotations();
+ if (class_type_annotations == NULL || class_type_annotations->length() == 0) {
+ // no class_type_annotations so nothing to do
+ return true;
+ }
+
+ RC_TRACE_WITH_THREAD(0x02000000, THREAD,
+ ("class_type_annotations length=%d", class_type_annotations->length()));
+
+ int byte_i = 0; // byte index into class_type_annotations
+ return rewrite_cp_refs_in_type_annotations_typeArray(class_type_annotations,
+ byte_i, "ClassFile", THREAD);
+} // end rewrite_cp_refs_in_class_type_annotations()
+
+
+// Rewrite constant pool references in a fields_type_annotations field.
+bool VM_RedefineClasses::rewrite_cp_refs_in_fields_type_annotations(
+ instanceKlassHandle scratch_class, TRAPS) {
+
+ Array<AnnotationArray*>* fields_type_annotations = scratch_class->fields_type_annotations();
+ if (fields_type_annotations == NULL || fields_type_annotations->length() == 0) {
+ // no fields_type_annotations so nothing to do
+ return true;
+ }
+
+ RC_TRACE_WITH_THREAD(0x02000000, THREAD,
+ ("fields_type_annotations length=%d", fields_type_annotations->length()));
+
+ for (int i = 0; i < fields_type_annotations->length(); i++) {
+ AnnotationArray* field_type_annotations = fields_type_annotations->at(i);
+ if (field_type_annotations == NULL || field_type_annotations->length() == 0) {
+ // this field does not have any annotations so skip it
+ continue;
+ }
+
+ int byte_i = 0; // byte index into field_type_annotations
+ if (!rewrite_cp_refs_in_type_annotations_typeArray(field_type_annotations,
+ byte_i, "field_info", THREAD)) {
+ RC_TRACE_WITH_THREAD(0x02000000, THREAD,
+ ("bad field_type_annotations at %d", i));
+ // propagate failure back to caller
+ return false;
+ }
+ }
+
+ return true;
+} // end rewrite_cp_refs_in_fields_type_annotations()
+
+
+// Rewrite constant pool references in a methods_type_annotations field.
+bool VM_RedefineClasses::rewrite_cp_refs_in_methods_type_annotations(
+ instanceKlassHandle scratch_class, TRAPS) {
+
+ for (int i = 0; i < scratch_class->methods()->length(); i++) {
+ Method* m = scratch_class->methods()->at(i);
+ AnnotationArray* method_type_annotations = m->constMethod()->type_annotations();
+
+ if (method_type_annotations == NULL || method_type_annotations->length() == 0) {
+ // this method does not have any annotations so skip it
+ continue;
+ }
+
+ RC_TRACE_WITH_THREAD(0x02000000, THREAD,
+ ("methods type_annotations length=%d", method_type_annotations->length()));
+
+ int byte_i = 0; // byte index into method_type_annotations
+ if (!rewrite_cp_refs_in_type_annotations_typeArray(method_type_annotations,
+ byte_i, "method_info", THREAD)) {
+ RC_TRACE_WITH_THREAD(0x02000000, THREAD,
+ ("bad method_type_annotations at %d", i));
+ // propagate failure back to caller
+ return false;
+ }
+ }
+
+ return true;
+} // end rewrite_cp_refs_in_methods_type_annotations()
+
+
+// Rewrite constant pool references in a type_annotations
+// field. This "structure" is adapted from the
+// RuntimeVisibleTypeAnnotations_attribute described in
+// section 4.7.20 of the Java SE 8 Edition of the VM spec:
+//
+// type_annotations_typeArray {
+// u2 num_annotations;
+// type_annotation annotations[num_annotations];
+// }
+//
+bool VM_RedefineClasses::rewrite_cp_refs_in_type_annotations_typeArray(
+ AnnotationArray* type_annotations_typeArray, int &byte_i_ref,
+ const char * location_mesg, TRAPS) {
+
+ if ((byte_i_ref + 2) > type_annotations_typeArray->length()) {
+ // not enough room for num_annotations field
+ RC_TRACE_WITH_THREAD(0x02000000, THREAD,
+ ("length() is too small for num_annotations field"));
+ return false;
+ }
+
+ u2 num_annotations = Bytes::get_Java_u2((address)
+ type_annotations_typeArray->adr_at(byte_i_ref));
+ byte_i_ref += 2;
+
+ RC_TRACE_WITH_THREAD(0x02000000, THREAD,
+ ("num_type_annotations=%d", num_annotations));
+
+ int calc_num_annotations = 0;
+ for (; calc_num_annotations < num_annotations; calc_num_annotations++) {
+ if (!rewrite_cp_refs_in_type_annotation_struct(type_annotations_typeArray,
+ byte_i_ref, location_mesg, THREAD)) {
+ RC_TRACE_WITH_THREAD(0x02000000, THREAD,
+ ("bad type_annotation_struct at %d", calc_num_annotations));
+ // propagate failure back to caller
+ return false;
+ }
+ }
+ assert(num_annotations == calc_num_annotations, "sanity check");
+
+ if (byte_i_ref != type_annotations_typeArray->length()) {
+ RC_TRACE_WITH_THREAD(0x02000000, THREAD,
+ ("read wrong amount of bytes at end of processing "
+ "type_annotations_typeArray (%d of %d bytes were read)",
+ byte_i_ref, type_annotations_typeArray->length()));
+ return false;
+ }
+
+ return true;
+} // end rewrite_cp_refs_in_type_annotations_typeArray()
+
+
+// Rewrite constant pool references in a type_annotation
+// field. This "structure" is adapted from the
+// RuntimeVisibleTypeAnnotations_attribute described in
+// section 4.7.20 of the Java SE 8 Edition of the VM spec:
+//
+// type_annotation {
+// u1 target_type;
+// union {
+// type_parameter_target;
+// supertype_target;
+// type_parameter_bound_target;
+// empty_target;
+// method_formal_parameter_target;
+// throws_target;
+// localvar_target;
+// catch_target;
+// offset_target;
+// type_argument_target;
+// } target_info;
+// type_path target_path;
+// annotation anno;
+// }
+//
+bool VM_RedefineClasses::rewrite_cp_refs_in_type_annotation_struct(
+ AnnotationArray* type_annotations_typeArray, int &byte_i_ref,
+ const char * location_mesg, TRAPS) {
+
+ if (!skip_type_annotation_target(type_annotations_typeArray,
+ byte_i_ref, location_mesg, THREAD)) {
+ return false;
+ }
+
+ if (!skip_type_annotation_type_path(type_annotations_typeArray,
+ byte_i_ref, THREAD)) {
+ return false;
+ }
+
+ if (!rewrite_cp_refs_in_annotation_struct(type_annotations_typeArray,
+ byte_i_ref, THREAD)) {
+ return false;
+ }
+
+ return true;
+} // end rewrite_cp_refs_in_type_annotation_struct()
+
+
+// Read, verify and skip over the target_type and target_info part
+// so that rewriting can continue in the later parts of the struct.
+//
+// u1 target_type;
+// union {
+// type_parameter_target;
+// supertype_target;
+// type_parameter_bound_target;
+// empty_target;
+// method_formal_parameter_target;
+// throws_target;
+// localvar_target;
+// catch_target;
+// offset_target;
+// type_argument_target;
+// } target_info;
+//
+bool VM_RedefineClasses::skip_type_annotation_target(
+ AnnotationArray* type_annotations_typeArray, int &byte_i_ref,
+ const char * location_mesg, TRAPS) {
+
+ if ((byte_i_ref + 1) > type_annotations_typeArray->length()) {
+ // not enough room for a target_type let alone the rest of a type_annotation
+ RC_TRACE_WITH_THREAD(0x02000000, THREAD,
+ ("length() is too small for a target_type"));
+ return false;
+ }
+
+ u1 target_type = type_annotations_typeArray->at(byte_i_ref);
+ byte_i_ref += 1;
+ RC_TRACE_WITH_THREAD(0x02000000, THREAD, ("target_type=0x%.2x", target_type));
+ RC_TRACE_WITH_THREAD(0x02000000, THREAD, ("location=%s", location_mesg));
+
+ // Skip over target_info
+ switch (target_type) {
+ case 0x00:
+ // kind: type parameter declaration of generic class or interface
+ // location: ClassFile
+ case 0x01:
+ // kind: type parameter declaration of generic method or constructor
+ // location: method_info
+
+ {
+ // struct:
+ // type_parameter_target {
+ // u1 type_parameter_index;
+ // }
+ //
+ if ((byte_i_ref + 1) > type_annotations_typeArray->length()) {
+ RC_TRACE_WITH_THREAD(0x02000000, THREAD,
+ ("length() is too small for a type_parameter_target"));
+ return false;
+ }
+
+ u1 type_parameter_index = type_annotations_typeArray->at(byte_i_ref);
+ byte_i_ref += 1;
+
+ RC_TRACE_WITH_THREAD(0x02000000, THREAD,
+ ("type_parameter_target: type_parameter_index=%d",
+ type_parameter_index));
+ } break;
+
+ case 0x10:
+ // kind: type in extends clause of class or interface declaration
+ // (including the direct superclass of an anonymous class declaration),
+ // or in implements clause of interface declaration
+ // location: ClassFile
+
+ {
+ // struct:
+ // supertype_target {
+ // u2 supertype_index;
+ // }
+ //
+ if ((byte_i_ref + 2) > type_annotations_typeArray->length()) {
+ RC_TRACE_WITH_THREAD(0x02000000, THREAD,
+ ("length() is too small for a supertype_target"));
+ return false;
+ }
+
+ u2 supertype_index = Bytes::get_Java_u2((address)
+ type_annotations_typeArray->adr_at(byte_i_ref));
+ byte_i_ref += 2;
+
+ RC_TRACE_WITH_THREAD(0x02000000, THREAD,
+ ("supertype_target: supertype_index=%d", supertype_index));
+ } break;
+
+ case 0x11:
+ // kind: type in bound of type parameter declaration of generic class or interface
+ // location: ClassFile
+ case 0x12:
+ // kind: type in bound of type parameter declaration of generic method or constructor
+ // location: method_info
+
+ {
+ // struct:
+ // type_parameter_bound_target {
+ // u1 type_parameter_index;
+ // u1 bound_index;
+ // }
+ //
+ if ((byte_i_ref + 2) > type_annotations_typeArray->length()) {
+ RC_TRACE_WITH_THREAD(0x02000000, THREAD,
+ ("length() is too small for a type_parameter_bound_target"));
+ return false;
+ }
+
+ u1 type_parameter_index = type_annotations_typeArray->at(byte_i_ref);
+ byte_i_ref += 1;
+ u1 bound_index = type_annotations_typeArray->at(byte_i_ref);
+ byte_i_ref += 1;
+
+ RC_TRACE_WITH_THREAD(0x02000000, THREAD,
+ ("type_parameter_bound_target: type_parameter_index=%d, bound_index=%d",
+ type_parameter_index, bound_index));
+ } break;
+
+ case 0x13:
+ // kind: type in field declaration
+ // location: field_info
+ case 0x14:
+ // kind: return type of method, or type of newly constructed object
+ // location: method_info
+ case 0x15:
+ // kind: receiver type of method or constructor
+ // location: method_info
+
+ {
+ // struct:
+ // empty_target {
+ // }
+ //
+ RC_TRACE_WITH_THREAD(0x02000000, THREAD,
+ ("empty_target"));
+ } break;
+
+ case 0x16:
+ // kind: type in formal parameter declaration of method, constructor, or lambda expression
+ // location: method_info
+
+ {
+ // struct:
+ // formal_parameter_target {
+ // u1 formal_parameter_index;
+ // }
+ //
+ if ((byte_i_ref + 1) > type_annotations_typeArray->length()) {
+ RC_TRACE_WITH_THREAD(0x02000000, THREAD,
+ ("length() is too small for a formal_parameter_target"));
+ return false;
+ }
+
+ u1 formal_parameter_index = type_annotations_typeArray->at(byte_i_ref);
+ byte_i_ref += 1;
+
+ RC_TRACE_WITH_THREAD(0x02000000, THREAD,
+ ("formal_parameter_target: formal_parameter_index=%d",
+ formal_parameter_index));
+ } break;
+
+ case 0x17:
+ // kind: type in throws clause of method or constructor
+ // location: method_info
+
+ {
+ // struct:
+ // throws_target {
+ // u2 throws_type_index
+ // }
+ //
+ if ((byte_i_ref + 2) > type_annotations_typeArray->length()) {
+ RC_TRACE_WITH_THREAD(0x02000000, THREAD,
+ ("length() is too small for a throws_target"));
+ return false;
+ }
+
+ u2 throws_type_index = Bytes::get_Java_u2((address)
+ type_annotations_typeArray->adr_at(byte_i_ref));
+ byte_i_ref += 2;
+
+ RC_TRACE_WITH_THREAD(0x02000000, THREAD,
+ ("throws_target: throws_type_index=%d", throws_type_index));
+ } break;
+
+ case 0x40:
+ // kind: type in local variable declaration
+ // location: Code
+ case 0x41:
+ // kind: type in resource variable declaration
+ // location: Code
+
+ {
+ // struct:
+ // localvar_target {
+ // u2 table_length;
+ // struct {
+ // u2 start_pc;
+ // u2 length;
+ // u2 index;
+ // } table[table_length];
+ // }
+ //
+ if ((byte_i_ref + 2) > type_annotations_typeArray->length()) {
+ // not enough room for a table_length let alone the rest of a localvar_target
+ RC_TRACE_WITH_THREAD(0x02000000, THREAD,
+ ("length() is too small for a localvar_target table_length"));
+ return false;
+ }
+
+ u2 table_length = Bytes::get_Java_u2((address)
+ type_annotations_typeArray->adr_at(byte_i_ref));
+ byte_i_ref += 2;
+
+ RC_TRACE_WITH_THREAD(0x02000000, THREAD,
+ ("localvar_target: table_length=%d", table_length));
+
+ int table_struct_size = 2 + 2 + 2; // 3 u2 variables per table entry
+ int table_size = table_length * table_struct_size;
+
+ if ((byte_i_ref + table_size) > type_annotations_typeArray->length()) {
+ // not enough room for a table
+ RC_TRACE_WITH_THREAD(0x02000000, THREAD,
+ ("length() is too small for a table array of length %d", table_length));
+ return false;
+ }
+
+ // Skip over table
+ byte_i_ref += table_size;
+ } break;
+
+ case 0x42:
+ // kind: type in exception parameter declaration
+ // location: Code
+
+ {
+ // struct:
+ // catch_target {
+ // u2 exception_table_index;
+ // }
+ //
+ if ((byte_i_ref + 2) > type_annotations_typeArray->length()) {
+ RC_TRACE_WITH_THREAD(0x02000000, THREAD,
+ ("length() is too small for a catch_target"));
+ return false;
+ }
+
+ u2 exception_table_index = Bytes::get_Java_u2((address)
+ type_annotations_typeArray->adr_at(byte_i_ref));
+ byte_i_ref += 2;
+
+ RC_TRACE_WITH_THREAD(0x02000000, THREAD,
+ ("catch_target: exception_table_index=%d", exception_table_index));
+ } break;
+
+ case 0x43:
+ // kind: type in instanceof expression
+ // location: Code
+ case 0x44:
+ // kind: type in new expression
+ // location: Code
+ case 0x45:
+ // kind: type in method reference expression using ::new
+ // location: Code
+ case 0x46:
+ // kind: type in method reference expression using ::Identifier
+ // location: Code
+
+ {
+ // struct:
+ // offset_target {
+ // u2 offset;
+ // }
+ //
+ if ((byte_i_ref + 2) > type_annotations_typeArray->length()) {
+ RC_TRACE_WITH_THREAD(0x02000000, THREAD,
+ ("length() is too small for a offset_target"));
+ return false;
+ }
+
+ u2 offset = Bytes::get_Java_u2((address)
+ type_annotations_typeArray->adr_at(byte_i_ref));
+ byte_i_ref += 2;
+
+ RC_TRACE_WITH_THREAD(0x02000000, THREAD,
+ ("offset_target: offset=%d", offset));
+ } break;
+
+ case 0x47:
+ // kind: type in cast expression
+ // location: Code
+ case 0x48:
+ // kind: type argument for generic constructor in new expression or
+ // explicit constructor invocation statement
+ // location: Code
+ case 0x49:
+ // kind: type argument for generic method in method invocation expression
+ // location: Code
+ case 0x4A:
+ // kind: type argument for generic constructor in method reference expression using ::new
+ // location: Code
+ case 0x4B:
+ // kind: type argument for generic method in method reference expression using ::Identifier
+ // location: Code
+
+ {
+ // struct:
+ // type_argument_target {
+ // u2 offset;
+ // u1 type_argument_index;
+ // }
+ //
+ if ((byte_i_ref + 3) > type_annotations_typeArray->length()) {
+ RC_TRACE_WITH_THREAD(0x02000000, THREAD,
+ ("length() is too small for a type_argument_target"));
+ return false;
+ }
+
+ u2 offset = Bytes::get_Java_u2((address)
+ type_annotations_typeArray->adr_at(byte_i_ref));
+ byte_i_ref += 2;
+ u1 type_argument_index = type_annotations_typeArray->at(byte_i_ref);
+ byte_i_ref += 1;
+
+ RC_TRACE_WITH_THREAD(0x02000000, THREAD,
+ ("type_argument_target: offset=%d, type_argument_index=%d",
+ offset, type_argument_index));
+ } break;
+
+ default:
+ RC_TRACE_WITH_THREAD(0x02000000, THREAD,
+ ("unknown target_type"));
+#ifdef ASSERT
+ ShouldNotReachHere();
+#endif
+ return false;
+ }
+
+ return true;
+} // end skip_type_annotation_target()
+
+
+// Read, verify and skip over the type_path part so that rewriting
+// can continue in the later parts of the struct.
+//
+// type_path {
+// u1 path_length;
+// {
+// u1 type_path_kind;
+// u1 type_argument_index;
+// } path[path_length];
+// }
+//
+bool VM_RedefineClasses::skip_type_annotation_type_path(
+ AnnotationArray* type_annotations_typeArray, int &byte_i_ref, TRAPS) {
+
+ if ((byte_i_ref + 1) > type_annotations_typeArray->length()) {
+ // not enough room for a path_length let alone the rest of the type_path
+ RC_TRACE_WITH_THREAD(0x02000000, THREAD,
+ ("length() is too small for a type_path"));
+ return false;
+ }
+
+ u1 path_length = type_annotations_typeArray->at(byte_i_ref);
+ byte_i_ref += 1;
+
+ RC_TRACE_WITH_THREAD(0x02000000, THREAD,
+ ("type_path: path_length=%d", path_length));
+
+ int calc_path_length = 0;
+ for (; calc_path_length < path_length; calc_path_length++) {
+ if ((byte_i_ref + 1 + 1) > type_annotations_typeArray->length()) {
+ // not enough room for a path
+ RC_TRACE_WITH_THREAD(0x02000000, THREAD,
+ ("length() is too small for path entry %d of %d",
+ calc_path_length, path_length));
+ return false;
+ }
+
+ u1 type_path_kind = type_annotations_typeArray->at(byte_i_ref);
+ byte_i_ref += 1;
+ u1 type_argument_index = type_annotations_typeArray->at(byte_i_ref);
+ byte_i_ref += 1;
+
+ RC_TRACE_WITH_THREAD(0x02000000, THREAD,
+ ("type_path: path[%d]: type_path_kind=%d, type_argument_index=%d",
+ calc_path_length, type_path_kind, type_argument_index));
+
+ if (type_path_kind > 3 || (type_path_kind != 3 && type_argument_index != 0)) {
+ // not enough room for a path
+ RC_TRACE_WITH_THREAD(0x02000000, THREAD,
+ ("inconsistent type_path values"));
+ return false;
+ }
+ }
+ assert(path_length == calc_path_length, "sanity check");
+
+ return true;
+} // end skip_type_annotation_type_path()
+
+
// Rewrite constant pool references in the method's stackmap table.
// These "structures" are adapted from the StackMapTable_attribute that
// is described in section 4.8.4 of the 6.0 version of the VM spec
@@ -3223,23 +3828,6 @@
void VM_RedefineClasses::swap_annotations(instanceKlassHandle the_class,
instanceKlassHandle scratch_class) {
- // Since there is currently no rewriting of type annotations indexes
- // into the CP, we null out type annotations on scratch_class before
- // we swap annotations with the_class rather than facing the
- // possibility of shipping annotations with broken indexes to
- // Java-land.
- ClassLoaderData* loader_data = scratch_class->class_loader_data();
- AnnotationArray* new_class_type_annotations = scratch_class->class_type_annotations();
- if (new_class_type_annotations != NULL) {
- MetadataFactory::free_array<u1>(loader_data, new_class_type_annotations);
- scratch_class->annotations()->set_class_type_annotations(NULL);
- }
- Array<AnnotationArray*>* new_field_type_annotations = scratch_class->fields_type_annotations();
- if (new_field_type_annotations != NULL) {
- Annotations::free_contents(loader_data, new_field_type_annotations);
- scratch_class->annotations()->set_fields_type_annotations(NULL);
- }
-
// Swap annotation fields values
Annotations* old_annotations = the_class->annotations();
the_class->set_annotations(scratch_class->annotations());