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8132051: Better byte behavior

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Co-authored-by: Roland Westerlin <roland.westerlin@oracle.com>
Co-authored-by: Vladimir Kozlov <vladimir.kozlov@oracle.com>
Co-authored-by: John Rose <john.r.rose@oracle.com>
Reviewed-by: bdelsart, roland, kvn, jrose, ahgross
This commit is contained in:
Coleen Phillimore 2015-10-13 18:13:34 -04:00
parent ed18f94d21
commit 200784d505
40 changed files with 514 additions and 88 deletions
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13
hotspot/src/share/vm/prims/unsafe.cpp
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@ -133,13 +133,22 @@ jlong Unsafe_field_offset_from_byte_offset(jlong byte_offset) {
///// Data in the Java heap.
#define truncate_jboolean(x) ((x) & 1)
#define truncate_jbyte(x) (x)
#define truncate_jshort(x) (x)
#define truncate_jchar(x) (x)
#define truncate_jint(x) (x)
#define truncate_jlong(x) (x)
#define truncate_jfloat(x) (x)
#define truncate_jdouble(x) (x)
#define GET_FIELD(obj, offset, type_name, v) \
oop p = JNIHandles::resolve(obj); \
type_name v = *(type_name*)index_oop_from_field_offset_long(p, offset)
#define SET_FIELD(obj, offset, type_name, x) \
oop p = JNIHandles::resolve(obj); \
*(type_name*)index_oop_from_field_offset_long(p, offset) = x
*(type_name*)index_oop_from_field_offset_long(p, offset) = truncate_##type_name(x)
#define GET_FIELD_VOLATILE(obj, offset, type_name, v) \
oop p = JNIHandles::resolve(obj); \
@ -150,7 +159,7 @@ jlong Unsafe_field_offset_from_byte_offset(jlong byte_offset) {
#define SET_FIELD_VOLATILE(obj, offset, type_name, x) \
oop p = JNIHandles::resolve(obj); \
OrderAccess::release_store_fence((volatile type_name*)index_oop_from_field_offset_long(p, offset), x);
OrderAccess::release_store_fence((volatile type_name*)index_oop_from_field_offset_long(p, offset), truncate_##type_name(x));
// Get/SetObject must be special-cased, since it works with handles.