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6420645: Create a vm that uses compressed oops for up to 32gb heapsizes

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Compressed oops in instances, arrays, and headers. Code contributors are coleenp, phh, never, swamyv

Reviewed-by: jmasa, kamg, acorn, tbell, kvn, rasbold
This commit is contained in:
Coleen Phillimore 2008-04-13 17:43:42 -04:00
parent 680ecf1611
commit 4a831d45f0
273 changed files with 6585 additions and 2993 deletions
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77
hotspot/src/share/vm/prims/unsafe.cpp
View file

@ -100,7 +100,7 @@ inline void* index_oop_from_field_offset_long(oop p, jlong field_offset) {
assert(byte_offset >= 0 && byte_offset <= (jlong)MAX_OBJECT_SIZE, "sane offset");
if (byte_offset == (jint)byte_offset) {
void* ptr_plus_disp = (address)p + byte_offset;
assert((void*)p->obj_field_addr((jint)byte_offset) == ptr_plus_disp,
assert((void*)p->obj_field_addr<oop>((jint)byte_offset) == ptr_plus_disp,
"raw [ptr+disp] must be consistent with oop::field_base");
}
}
@ -146,13 +146,36 @@ jint Unsafe_invocation_key_to_method_slot(jint key) {
*(volatile type_name*)index_oop_from_field_offset_long(p, offset) = x; \
OrderAccess::fence();
// Macros for oops that check UseCompressedOops
#define GET_OOP_FIELD(obj, offset, v) \
oop p = JNIHandles::resolve(obj); \
oop v; \
if (UseCompressedOops) { \
narrowOop n = *(narrowOop*)index_oop_from_field_offset_long(p, offset); \
v = oopDesc::decode_heap_oop(n); \
} else { \
v = *(oop*)index_oop_from_field_offset_long(p, offset); \
}
#define GET_OOP_FIELD_VOLATILE(obj, offset, v) \
oop p = JNIHandles::resolve(obj); \
volatile oop v; \
if (UseCompressedOops) { \
volatile narrowOop n = *(volatile narrowOop*)index_oop_from_field_offset_long(p, offset); \
v = oopDesc::decode_heap_oop(n); \
} else { \
v = *(volatile oop*)index_oop_from_field_offset_long(p, offset); \
}
// Get/SetObject must be special-cased, since it works with handles.
// The xxx140 variants for backward compatibility do not allow a full-width offset.
UNSAFE_ENTRY(jobject, Unsafe_GetObject140(JNIEnv *env, jobject unsafe, jobject obj, jint offset))
UnsafeWrapper("Unsafe_GetObject");
if (obj == NULL) THROW_0(vmSymbols::java_lang_NullPointerException());
GET_FIELD(obj, offset, oop, v);
GET_OOP_FIELD(obj, offset, v)
return JNIHandles::make_local(env, v);
UNSAFE_END
@ -162,11 +185,21 @@ UNSAFE_ENTRY(void, Unsafe_SetObject140(JNIEnv *env, jobject unsafe, jobject obj,
oop x = JNIHandles::resolve(x_h);
//SET_FIELD(obj, offset, oop, x);
oop p = JNIHandles::resolve(obj);
if (x != NULL) {
// If there is a heap base pointer, we are obliged to emit a store barrier.
oop_store((oop*)index_oop_from_field_offset_long(p, offset), x);
if (UseCompressedOops) {
if (x != NULL) {
// If there is a heap base pointer, we are obliged to emit a store barrier.
oop_store((narrowOop*)index_oop_from_field_offset_long(p, offset), x);
} else {
narrowOop n = oopDesc::encode_heap_oop_not_null(x);
*(narrowOop*)index_oop_from_field_offset_long(p, offset) = n;
}
} else {
*(oop*)index_oop_from_field_offset_long(p, offset) = x;
if (x != NULL) {
// If there is a heap base pointer, we are obliged to emit a store barrier.
oop_store((oop*)index_oop_from_field_offset_long(p, offset), x);
} else {
*(oop*)index_oop_from_field_offset_long(p, offset) = x;
}
}
UNSAFE_END
@ -175,7 +208,7 @@ UNSAFE_END
// That is, it should be in the range [0, MAX_OBJECT_SIZE].
UNSAFE_ENTRY(jobject, Unsafe_GetObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset))
UnsafeWrapper("Unsafe_GetObject");
GET_FIELD(obj, offset, oop, v);
GET_OOP_FIELD(obj, offset, v)
return JNIHandles::make_local(env, v);
UNSAFE_END
@ -183,12 +216,16 @@ UNSAFE_ENTRY(void, Unsafe_SetObject(JNIEnv *env, jobject unsafe, jobject obj, jl
UnsafeWrapper("Unsafe_SetObject");
oop x = JNIHandles::resolve(x_h);
oop p = JNIHandles::resolve(obj);
oop_store((oop*)index_oop_from_field_offset_long(p, offset), x);
if (UseCompressedOops) {
oop_store((narrowOop*)index_oop_from_field_offset_long(p, offset), x);
} else {
oop_store((oop*)index_oop_from_field_offset_long(p, offset), x);
}
UNSAFE_END
UNSAFE_ENTRY(jobject, Unsafe_GetObjectVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset))
UnsafeWrapper("Unsafe_GetObjectVolatile");
GET_FIELD_VOLATILE(obj, offset, oop, v);
GET_OOP_FIELD_VOLATILE(obj, offset, v)
return JNIHandles::make_local(env, v);
UNSAFE_END
@ -196,7 +233,11 @@ UNSAFE_ENTRY(void, Unsafe_SetObjectVolatile(JNIEnv *env, jobject unsafe, jobject
UnsafeWrapper("Unsafe_SetObjectVolatile");
oop x = JNIHandles::resolve(x_h);
oop p = JNIHandles::resolve(obj);
oop_store((oop*)index_oop_from_field_offset_long(p, offset), x);
if (UseCompressedOops) {
oop_store((narrowOop*)index_oop_from_field_offset_long(p, offset), x);
} else {
oop_store((oop*)index_oop_from_field_offset_long(p, offset), x);
}
OrderAccess::fence();
UNSAFE_END
@ -311,7 +352,11 @@ UNSAFE_ENTRY(void, Unsafe_SetOrderedObject(JNIEnv *env, jobject unsafe, jobject
UnsafeWrapper("Unsafe_SetOrderedObject");
oop x = JNIHandles::resolve(x_h);
oop p = JNIHandles::resolve(obj);
oop_store((oop*)index_oop_from_field_offset_long(p, offset), x);
if (UseCompressedOops) {
oop_store((narrowOop*)index_oop_from_field_offset_long(p, offset), x);
} else {
oop_store((oop*)index_oop_from_field_offset_long(p, offset), x);
}
OrderAccess::fence();
UNSAFE_END
@ -647,7 +692,7 @@ static void getBaseAndScale(int& base, int& scale, jclass acls, TRAPS) {
THROW(vmSymbols::java_lang_InvalidClassException());
} else if (k->klass_part()->oop_is_objArray()) {
base = arrayOopDesc::base_offset_in_bytes(T_OBJECT);
scale = oopSize;
scale = heapOopSize;
} else if (k->klass_part()->oop_is_typeArray()) {
typeArrayKlass* tak = typeArrayKlass::cast(k);
base = tak->array_header_in_bytes();
@ -845,11 +890,11 @@ UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapObject(JNIEnv *env, jobject unsafe,
oop x = JNIHandles::resolve(x_h);
oop e = JNIHandles::resolve(e_h);
oop p = JNIHandles::resolve(obj);
intptr_t* addr = (intptr_t *)index_oop_from_field_offset_long(p, offset);
intptr_t res = Atomic::cmpxchg_ptr((intptr_t)x, addr, (intptr_t)e);
jboolean success = (res == (intptr_t)e);
HeapWord* addr = (HeapWord *)index_oop_from_field_offset_long(p, offset);
oop res = oopDesc::atomic_compare_exchange_oop(x, addr, e);
jboolean success = (res == e);
if (success)
update_barrier_set((oop*)addr, x);
update_barrier_set((void*)addr, x);
return success;
UNSAFE_END