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src/hotspot/share/oops/accessBackend.hpp
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@@ -1,7 +1,7 @@
/*
- * Copyright (c) 2017, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2017, 2019, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
@@ -50,10 +50,18 @@
static const bool needs_oop_compress = HasDecorator<decorators, INTERNAL_CONVERT_COMPRESSED_OOP>::value &&
HasDecorator<decorators, INTERNAL_RT_USE_COMPRESSED_OOPS>::value;
typedef typename Conditional<needs_oop_compress, narrowOop, oop>::type type;
};
+// This meta-function returns either oop or narrowOop depending on whether
+// a back-end needs to consider compressed oops types or not.
+template <DecoratorSet decorators>
+struct ValueOopType: AllStatic {
+ static const bool needs_oop_compress = HasDecorator<decorators, INTERNAL_RT_USE_COMPRESSED_OOPS>::value;
+ typedef typename Conditional<needs_oop_compress, narrowOop, oop>::type type;
+};
+
namespace AccessInternal {
enum BarrierType {
BARRIER_STORE,
BARRIER_STORE_AT,
BARRIER_LOAD,
@@ -62,10 +70,11 @@
BARRIER_ATOMIC_CMPXCHG_AT,
BARRIER_ATOMIC_XCHG,
BARRIER_ATOMIC_XCHG_AT,
BARRIER_ARRAYCOPY,
BARRIER_CLONE,
+ BARRIER_VALUE_COPY,
BARRIER_RESOLVE
};
template <DecoratorSet decorators, typename T>
struct MustConvertCompressedOop: public IntegralConstant<bool,
@@ -112,10 +121,11 @@
typedef void (*arraycopy_func_t)(arrayOop src_obj, size_t src_offset_in_bytes, T* src_raw,
arrayOop dst_obj, size_t dst_offset_in_bytes, T* dst_raw,
size_t length);
typedef void (*clone_func_t)(oop src, oop dst, size_t size);
+ typedef void (*value_copy_func_t)(void* src, void* dst, ValueKlass* md);
typedef oop (*resolve_func_t)(oop obj);
};
template <DecoratorSet decorators>
struct AccessFunctionTypes<decorators, void> {
@@ -139,10 +149,11 @@
ACCESS_GENERATE_ACCESS_FUNCTION(BARRIER_ATOMIC_CMPXCHG_AT, atomic_cmpxchg_at_func_t);
ACCESS_GENERATE_ACCESS_FUNCTION(BARRIER_ATOMIC_XCHG, atomic_xchg_func_t);
ACCESS_GENERATE_ACCESS_FUNCTION(BARRIER_ATOMIC_XCHG_AT, atomic_xchg_at_func_t);
ACCESS_GENERATE_ACCESS_FUNCTION(BARRIER_ARRAYCOPY, arraycopy_func_t);
ACCESS_GENERATE_ACCESS_FUNCTION(BARRIER_CLONE, clone_func_t);
+ ACCESS_GENERATE_ACCESS_FUNCTION(BARRIER_VALUE_COPY, value_copy_func_t);
ACCESS_GENERATE_ACCESS_FUNCTION(BARRIER_RESOLVE, resolve_func_t);
#undef ACCESS_GENERATE_ACCESS_FUNCTION
template <DecoratorSet decorators, typename T, BarrierType barrier_type>
typename AccessFunction<decorators, T, barrier_type>::type resolve_barrier();
@@ -404,10 +415,12 @@
arrayOop dst_obj, size_t dst_offset_in_bytes, T* dst_raw,
size_t length);
static void clone(oop src, oop dst, size_t size);
+ static void value_copy(void* src, void* dst, ValueKlass* md);
+
static oop resolve(oop obj) { return obj; }
};
// Below is the implementation of the first 4 steps of the template pipeline:
// * Step 1: Set default decorators and decay types. This step gets rid of CV qualifiers
@@ -587,10 +600,22 @@
_clone_func(src, dst, size);
}
};
template <DecoratorSet decorators, typename T>
+ struct RuntimeDispatch<decorators, T, BARRIER_VALUE_COPY>: AllStatic {
+ typedef typename AccessFunction<decorators, T, BARRIER_VALUE_COPY>::type func_t;
+ static func_t _value_copy_func;
+
+ static void value_copy_init(void* src, void* dst, ValueKlass* md);
+
+ static inline void value_copy(void* src, void* dst, ValueKlass* md) {
+ _value_copy_func(src, dst, md);
+ }
+ };
+
+ template <DecoratorSet decorators, typename T>
struct RuntimeDispatch<decorators, T, BARRIER_RESOLVE>: AllStatic {
typedef typename AccessFunction<decorators, T, BARRIER_RESOLVE>::type func_t;
static func_t _resolve_func;
static oop resolve_init(oop obj);
@@ -640,10 +665,14 @@
template <DecoratorSet decorators, typename T>
typename AccessFunction<decorators, T, BARRIER_CLONE>::type
RuntimeDispatch<decorators, T, BARRIER_CLONE>::_clone_func = &clone_init;
template <DecoratorSet decorators, typename T>
+ typename AccessFunction<decorators, T, BARRIER_VALUE_COPY>::type
+ RuntimeDispatch<decorators, T, BARRIER_VALUE_COPY>::_value_copy_func = &value_copy_init;
+
+ template <DecoratorSet decorators, typename T>
typename AccessFunction<decorators, T, BARRIER_RESOLVE>::type
RuntimeDispatch<decorators, T, BARRIER_RESOLVE>::_resolve_func = &resolve_init;
// Step 3: Pre-runtime dispatching.
// The PreRuntimeDispatch class is responsible for filtering the barrier strength
@@ -961,10 +990,27 @@
RuntimeDispatch<decorators, oop, BARRIER_CLONE>::clone(src, dst, size);
}
template <DecoratorSet decorators>
inline static typename EnableIf<
+ HasDecorator<decorators, AS_RAW>::value>::type
+ value_copy(void* src, void* dst, ValueKlass* md) {
+ typedef RawAccessBarrier<decorators & RAW_DECORATOR_MASK> Raw;
+ Raw::value_copy(src, dst, md);
+ }
+
+ template <DecoratorSet decorators>
+ inline static typename EnableIf<
+ !HasDecorator<decorators, AS_RAW>::value>::type
+ value_copy(void* src, void* dst, ValueKlass* md) {
+ const DecoratorSet expanded_decorators = decorators;
+ RuntimeDispatch<expanded_decorators, void*, BARRIER_VALUE_COPY>::value_copy(src, dst, md);
+ }
+
+
+ template <DecoratorSet decorators>
+ inline static typename EnableIf<
HasDecorator<decorators, INTERNAL_BT_TO_SPACE_INVARIANT>::value, oop>::type
resolve(oop obj) {
typedef RawAccessBarrier<decorators & RAW_DECORATOR_MASK> Raw;
return Raw::resolve(obj);
}
@@ -1266,10 +1312,16 @@
const DecoratorSet expanded_decorators = DecoratorFixup<decorators>::value;
PreRuntimeDispatch::clone<expanded_decorators>(src, dst, size);
}
template <DecoratorSet decorators>
+ inline void value_copy(void* src, void* dst, ValueKlass* md) {
+ const DecoratorSet expanded_decorators = DecoratorFixup<decorators>::value;
+ PreRuntimeDispatch::value_copy<expanded_decorators>(src, dst, md);
+ }
+
+ template <DecoratorSet decorators>
inline oop resolve(oop obj) {
const DecoratorSet expanded_decorators = DecoratorFixup<decorators>::value;
return PreRuntimeDispatch::resolve<expanded_decorators>(obj);
}
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