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dmh-field-accessors-java8.patch
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dmh-field-accessors-java8.patch
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Add support for DirectMethodHandle field implementations (StaticAccessor/Accessor).
During the redefinition run, these instances are updated to point to new field index location.
# HG changeset patch
# Parent a5d69314e0a8e05605ca678e31eeba92ec173400
diff -r a5d69314e0a8 src/share/vm/classfile/javaClasses.cpp
--- a/src/share/vm/classfile/javaClasses.cpp Tue Mar 31 18:05:19 2015 -0700
+++ b/src/share/vm/classfile/javaClasses.cpp Tue Mar 31 18:06:35 2015 -0700
@@ -2667,6 +2667,50 @@
}
}
+// Support for java_lang_invoke_DirectMethodHandle$StaticAccessor
+
+int java_lang_invoke_DirectMethodHandle_StaticAccessor::_static_offset_offset;
+
+long java_lang_invoke_DirectMethodHandle_StaticAccessor::static_offset(oop dmh) {
+ assert(_static_offset_offset != 0, "");
+ return dmh->long_field(_static_offset_offset);
+}
+
+void java_lang_invoke_DirectMethodHandle_StaticAccessor::set_static_offset(oop dmh, long static_offset) {
+ assert(_static_offset_offset != 0, "");
+ dmh->long_field_put(_static_offset_offset, static_offset);
+}
+
+
+void java_lang_invoke_DirectMethodHandle_StaticAccessor::compute_offsets() {
+ Klass* klass_oop = SystemDictionary::DirectMethodHandle_StaticAccessor_klass();
+ if (klass_oop != NULL && EnableInvokeDynamic) {
+ compute_offset(_static_offset_offset, klass_oop, vmSymbols::static_offset_name(), vmSymbols::long_signature());
+ }
+}
+
+// Support for java_lang_invoke_DirectMethodHandle$Accessor
+
+int java_lang_invoke_DirectMethodHandle_Accessor::_field_offset_offset;
+
+int java_lang_invoke_DirectMethodHandle_Accessor::field_offset(oop dmh) {
+ assert(_field_offset_offset != 0, "");
+ return dmh->int_field(_field_offset_offset);
+}
+
+void java_lang_invoke_DirectMethodHandle_Accessor::set_field_offset(oop dmh, int field_offset) {
+ assert(_field_offset_offset != 0, "");
+ dmh->int_field_put(_field_offset_offset, field_offset);
+}
+
+
+void java_lang_invoke_DirectMethodHandle_Accessor::compute_offsets() {
+ Klass* klass_oop = SystemDictionary::DirectMethodHandle_Accessor_klass();
+ if (klass_oop != NULL && EnableInvokeDynamic) {
+ compute_offset(_field_offset_offset, klass_oop, vmSymbols::field_offset_name(), vmSymbols::int_signature());
+ }
+}
+
// Support for java_lang_invoke_MethodHandle
int java_lang_invoke_MethodHandle::_type_offset;
@@ -3343,6 +3387,9 @@
java_lang_invoke_LambdaForm::compute_offsets();
java_lang_invoke_MethodType::compute_offsets();
java_lang_invoke_CallSite::compute_offsets();
+
+ java_lang_invoke_DirectMethodHandle_StaticAccessor::compute_offsets();
+ java_lang_invoke_DirectMethodHandle_Accessor::compute_offsets();
}
java_security_AccessControlContext::compute_offsets();
// Initialize reflection classes. The layouts of these classes
diff -r a5d69314e0a8 src/share/vm/classfile/javaClasses.hpp
--- a/src/share/vm/classfile/javaClasses.hpp Tue Mar 31 18:05:19 2015 -0700
+++ b/src/share/vm/classfile/javaClasses.hpp Tue Mar 31 18:06:35 2015 -0700
@@ -1020,6 +1020,55 @@
static int member_offset_in_bytes() { return _member_offset; }
};
+// Interface to java.lang.invoke.DirectMethodHandle$StaticAccessor objects
+
+class java_lang_invoke_DirectMethodHandle_StaticAccessor: AllStatic {
+ friend class JavaClasses;
+
+ private:
+ static int _static_offset_offset; // offset to static field
+
+ static void compute_offsets();
+
+ public:
+ // Accessors
+ static long static_offset(oop dmh);
+ static void set_static_offset(oop dmh, long value);
+
+ // Testers
+ static bool is_subclass(Klass* klass) {
+ return klass->is_subclass_of(SystemDictionary::DirectMethodHandle_StaticAccessor_klass());
+ }
+ static bool is_instance(oop obj) {
+ return obj != NULL && is_subclass(obj->klass());
+ }
+};
+
+// Interface to java.lang.invoke.DirectMethodHandle$Accessor objects
+
+class java_lang_invoke_DirectMethodHandle_Accessor: AllStatic {
+ friend class JavaClasses;
+
+ private:
+ static int _field_offset_offset; // offset to field
+
+ static void compute_offsets();
+
+ public:
+ // Accessors
+ static int field_offset(oop dmh);
+ static void set_field_offset(oop dmh, int value);
+
+ // Testers
+ static bool is_subclass(Klass* klass) {
+ return klass->is_subclass_of(SystemDictionary::DirectMethodHandle_Accessor_klass());
+ }
+ static bool is_instance(oop obj) {
+ return obj != NULL && is_subclass(obj->klass());
+ }
+};
+
+
// Interface to java.lang.invoke.LambdaForm objects
// (These are a private interface for managing adapter code generation.)
diff -r a5d69314e0a8 src/share/vm/classfile/systemDictionary.hpp
--- a/src/share/vm/classfile/systemDictionary.hpp Tue Mar 31 18:05:19 2015 -0700
+++ b/src/share/vm/classfile/systemDictionary.hpp Tue Mar 31 18:06:35 2015 -0700
@@ -153,6 +153,8 @@
\
/* support for dynamic typing; it's OK if these are NULL in earlier JDKs */ \
do_klass(DirectMethodHandle_klass, java_lang_invoke_DirectMethodHandle, Opt ) \
+ do_klass(DirectMethodHandle_StaticAccessor_klass, java_lang_invoke_DirectMethodHandle_StaticAccessor, Opt ) \
+ do_klass(DirectMethodHandle_Accessor_klass, java_lang_invoke_DirectMethodHandle_Accessor, Opt ) \
do_klass(MethodHandle_klass, java_lang_invoke_MethodHandle, Pre_JSR292 ) \
do_klass(MemberName_klass, java_lang_invoke_MemberName, Pre_JSR292 ) \
do_klass(MethodHandleNatives_klass, java_lang_invoke_MethodHandleNatives, Pre_JSR292 ) \
diff -r a5d69314e0a8 src/share/vm/classfile/vmSymbols.hpp
--- a/src/share/vm/classfile/vmSymbols.hpp Tue Mar 31 18:05:19 2015 -0700
+++ b/src/share/vm/classfile/vmSymbols.hpp Tue Mar 31 18:06:35 2015 -0700
@@ -265,6 +265,8 @@
template(java_lang_invoke_CallSite, "java/lang/invoke/CallSite") \
template(java_lang_invoke_ConstantCallSite, "java/lang/invoke/ConstantCallSite") \
template(java_lang_invoke_DirectMethodHandle, "java/lang/invoke/DirectMethodHandle") \
+ template(java_lang_invoke_DirectMethodHandle_StaticAccessor, "java/lang/invoke/DirectMethodHandle$StaticAccessor") \
+ template(java_lang_invoke_DirectMethodHandle_Accessor, "java/lang/invoke/DirectMethodHandle$Accessor") \
template(java_lang_invoke_MutableCallSite, "java/lang/invoke/MutableCallSite") \
template(java_lang_invoke_VolatileCallSite, "java/lang/invoke/VolatileCallSite") \
template(java_lang_invoke_MethodHandle, "java/lang/invoke/MethodHandle") \
@@ -414,6 +416,10 @@
template(getProtectionDomain_name, "getProtectionDomain") \
template(getProtectionDomain_signature, "(Ljava/security/CodeSource;)Ljava/security/ProtectionDomain;") \
template(url_code_signer_array_void_signature, "(Ljava/net/URL;[Ljava/security/CodeSigner;)V") \
+ template(static_offset_name, "staticOffset") \
+ template(static_base_name, "staticBase") \
+ template(field_offset_name, "fieldOffset") \
+ template(field_type_name, "fieldType") \
\
/* non-intrinsic name/signature pairs: */ \
template(register_method_name, "register") \