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8029075: String deduplication in G1

Browse source 
Implementation of JEP 192, http://openjdk.java.net/jeps/192

Reviewed-by: brutisso, tschatzl, coleenp
This commit is contained in:
Per Lidén 2014-03-18 19:07:22 +01:00
parent 1e1ad7f132
commit 4a4c0fce93
32 changed files with 2915 additions and 17 deletions
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20
hotspot/src/share/vm/classfile/javaClasses.hpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 1997, 2014, 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
@ -61,10 +61,6 @@ class java_lang_String : AllStatic {
static Handle basic_create(int length, TRAPS);
static void set_value( oop string, typeArrayOop buffer) {
assert(initialized, "Must be initialized");
string->obj_field_put(value_offset, (oop)buffer);
}
static void set_offset(oop string, int offset) {
assert(initialized, "Must be initialized");
if (offset_offset > 0) {
@ -122,12 +118,26 @@ class java_lang_String : AllStatic {
return hash_offset;
}
static void set_value(oop string, typeArrayOop buffer) {
assert(initialized && (value_offset > 0), "Must be initialized");
string->obj_field_put(value_offset, (oop)buffer);
}
static void set_hash(oop string, unsigned int hash) {
assert(initialized && (hash_offset > 0), "Must be initialized");
string->int_field_put(hash_offset, hash);
}
// Accessors
static typeArrayOop value(oop java_string) {
assert(initialized && (value_offset > 0), "Must be initialized");
assert(is_instance(java_string), "must be java_string");
return (typeArrayOop) java_string->obj_field(value_offset);
}
static unsigned int hash(oop java_string) {
assert(initialized && (hash_offset > 0), "Must be initialized");
assert(is_instance(java_string), "must be java_string");
return java_string->int_field(hash_offset);
}
static int offset(oop java_string) {
assert(initialized, "Must be initialized");
assert(is_instance(java_string), "must be java_string");