author | twisti |
Tue, 24 Jul 2012 10:51:00 -0700 | |
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/* |
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* Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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#ifndef SHARE_VM_OOPS_CONSTANTPOOLOOP_HPP |
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#define SHARE_VM_OOPS_CONSTANTPOOLOOP_HPP |
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#include "oops/arrayOop.hpp" |
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#include "oops/cpCacheOop.hpp" |
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#include "oops/symbol.hpp" |
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#include "oops/typeArrayOop.hpp" |
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#include "utilities/constantTag.hpp" |
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#ifdef TARGET_ARCH_x86 |
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# include "bytes_x86.hpp" |
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#endif |
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#ifdef TARGET_ARCH_sparc |
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# include "bytes_sparc.hpp" |
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#endif |
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#ifdef TARGET_ARCH_zero |
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# include "bytes_zero.hpp" |
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#endif |
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#ifdef TARGET_ARCH_arm |
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# include "bytes_arm.hpp" |
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#endif |
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#ifdef TARGET_ARCH_ppc |
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# include "bytes_ppc.hpp" |
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#endif |
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// A constantPool is an array containing class constants as described in the |
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// class file. |
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// |
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// Most of the constant pool entries are written during class parsing, which |
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// is safe. For klass and string types, the constant pool entry is |
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// modified when the entry is resolved. If a klass or string constant pool |
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// entry is read without a lock, only the resolved state guarantees that |
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// the entry in the constant pool is a klass or String object and |
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// not a Symbol*. |
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class SymbolHashMap; |
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class CPSlot VALUE_OBJ_CLASS_SPEC { |
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intptr_t _ptr; |
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public: |
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CPSlot(intptr_t ptr): _ptr(ptr) {} |
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CPSlot(void* ptr): _ptr((intptr_t)ptr) {} |
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CPSlot(oop ptr): _ptr((intptr_t)ptr) {} |
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CPSlot(Symbol* ptr): _ptr((intptr_t)ptr | 1) {} |
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intptr_t value() { return _ptr; } |
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bool is_oop() { return (_ptr & 1) == 0; } |
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bool is_metadata() { return (_ptr & 1) == 1; } |
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oop get_oop() { |
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assert(is_oop(), "bad call"); |
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return oop(_ptr); |
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} |
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Symbol* get_symbol() { |
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assert(is_metadata(), "bad call"); |
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return (Symbol*)(_ptr & ~1); |
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} |
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}; |
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class constantPoolOopDesc : public oopDesc { |
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friend class VMStructs; |
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friend class BytecodeInterpreter; // Directly extracts an oop in the pool for fast instanceof/checkcast |
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private: |
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typeArrayOop _tags; // the tag array describing the constant pool's contents |
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constantPoolCacheOop _cache; // the cache holding interpreter runtime information |
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klassOop _pool_holder; // the corresponding class |
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typeArrayOop _operands; // for variable-sized (InvokeDynamic) nodes, usually empty |
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int _flags; // a few header bits to describe contents for GC |
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int _length; // number of elements in the array |
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volatile bool _is_conc_safe; // if true, safe for concurrent |
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// GC processing |
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// only set to non-zero if constant pool is merged by RedefineClasses |
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int _orig_length; |
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void set_tags(typeArrayOop tags) { oop_store_without_check((oop*)&_tags, tags); } |
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void tag_at_put(int which, jbyte t) { tags()->byte_at_put(which, t); } |
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void release_tag_at_put(int which, jbyte t) { tags()->release_byte_at_put(which, t); } |
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void set_operands(typeArrayOop operands) { oop_store_without_check((oop*)&_operands, operands); } |
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enum FlagBit { |
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FB_has_invokedynamic = 1, |
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FB_has_pseudo_string = 2, |
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FB_has_preresolution = 3 |
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}; |
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int flags() const { return _flags; } |
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void set_flags(int f) { _flags = f; } |
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bool flag_at(FlagBit fb) const { return (_flags & (1 << (int)fb)) != 0; } |
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void set_flag_at(FlagBit fb); |
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// no clear_flag_at function; they only increase |
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private: |
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intptr_t* base() const { return (intptr_t*) (((char*) this) + sizeof(constantPoolOopDesc)); } |
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oop* tags_addr() { return (oop*)&_tags; } |
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oop* cache_addr() { return (oop*)&_cache; } |
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oop* operands_addr() { return (oop*)&_operands; } |
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CPSlot slot_at(int which) { |
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assert(is_within_bounds(which), "index out of bounds"); |
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// There's a transitional value of zero when converting from |
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// Symbol->0->Klass for G1 when resolving classes and strings. |
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// wait for the value to be non-zero (this is temporary) |
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volatile intptr_t adr = (intptr_t)OrderAccess::load_ptr_acquire(obj_at_addr_raw(which)); |
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if (adr == 0 && which != 0) { |
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constantTag t = tag_at(which); |
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if (t.is_unresolved_klass() || t.is_klass() || |
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t.is_unresolved_string() || t.is_string()) { |
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while ((adr = (intptr_t)OrderAccess::load_ptr_acquire(obj_at_addr_raw(which))) == 0); |
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} |
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} |
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return CPSlot(adr); |
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} |
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void slot_at_put(int which, CPSlot s) const { |
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assert(is_within_bounds(which), "index out of bounds"); |
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*(intptr_t*)&base()[which] = s.value(); |
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} |
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oop* obj_at_addr_raw(int which) const { |
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assert(is_within_bounds(which), "index out of bounds"); |
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return (oop*) &base()[which]; |
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} |
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void obj_at_put_without_check(int which, oop o) { |
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assert(is_within_bounds(which), "index out of bounds"); |
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oop_store_without_check((volatile oop *)obj_at_addr_raw(which), o); |
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} |
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void obj_at_put(int which, oop o) const { |
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assert(is_within_bounds(which), "index out of bounds"); |
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oop_store((volatile oop*)obj_at_addr_raw(which), o); |
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} |
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jint* int_at_addr(int which) const { |
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assert(is_within_bounds(which), "index out of bounds"); |
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return (jint*) &base()[which]; |
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} |
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jlong* long_at_addr(int which) const { |
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assert(is_within_bounds(which), "index out of bounds"); |
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return (jlong*) &base()[which]; |
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} |
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jfloat* float_at_addr(int which) const { |
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assert(is_within_bounds(which), "index out of bounds"); |
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return (jfloat*) &base()[which]; |
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} |
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jdouble* double_at_addr(int which) const { |
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assert(is_within_bounds(which), "index out of bounds"); |
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return (jdouble*) &base()[which]; |
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} |
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public: |
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typeArrayOop tags() const { return _tags; } |
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typeArrayOop operands() const { return _operands; } |
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bool has_pseudo_string() const { return flag_at(FB_has_pseudo_string); } |
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bool has_invokedynamic() const { return flag_at(FB_has_invokedynamic); } |
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bool has_preresolution() const { return flag_at(FB_has_preresolution); } |
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void set_pseudo_string() { set_flag_at(FB_has_pseudo_string); } |
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void set_invokedynamic() { set_flag_at(FB_has_invokedynamic); } |
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void set_preresolution() { set_flag_at(FB_has_preresolution); } |
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|
1 | 188 |
// Klass holding pool |
189 |
klassOop pool_holder() const { return _pool_holder; } |
|
190 |
void set_pool_holder(klassOop k) { oop_store_without_check((oop*)&_pool_holder, (oop) k); } |
|
191 |
oop* pool_holder_addr() { return (oop*)&_pool_holder; } |
|
192 |
||
193 |
// Interpreter runtime support |
|
194 |
constantPoolCacheOop cache() const { return _cache; } |
|
195 |
void set_cache(constantPoolCacheOop cache){ oop_store((oop*)&_cache, cache); } |
|
196 |
||
197 |
// Assembly code support |
|
198 |
static int tags_offset_in_bytes() { return offset_of(constantPoolOopDesc, _tags); } |
|
199 |
static int cache_offset_in_bytes() { return offset_of(constantPoolOopDesc, _cache); } |
|
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static int operands_offset_in_bytes() { return offset_of(constantPoolOopDesc, _operands); } |
1 | 201 |
static int pool_holder_offset_in_bytes() { return offset_of(constantPoolOopDesc, _pool_holder); } |
202 |
||
203 |
// Storing constants |
|
204 |
||
205 |
void klass_at_put(int which, klassOop k) { |
|
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// Overwrite the old index with a GC friendly value so |
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207 |
// that if G1 looks during the transition during oop_store it won't |
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// assert the symbol is not an oop. |
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209 |
*obj_at_addr_raw(which) = NULL; |
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210 |
assert(k != NULL, "resolved class shouldn't be null"); |
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211 |
obj_at_put_without_check(which, k); |
1 | 212 |
// The interpreter assumes when the tag is stored, the klass is resolved |
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213 |
// and the klassOop is a klass rather than a Symbol*, so we need |
1 | 214 |
// hardware store ordering here. |
215 |
release_tag_at_put(which, JVM_CONSTANT_Class); |
|
216 |
if (UseConcMarkSweepGC) { |
|
217 |
// In case the earlier card-mark was consumed by a concurrent |
|
218 |
// marking thread before the tag was updated, redirty the card. |
|
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219 |
obj_at_put_without_check(which, k); |
1 | 220 |
} |
221 |
} |
|
222 |
||
223 |
// For temporary use while constructing constant pool |
|
224 |
void klass_index_at_put(int which, int name_index) { |
|
225 |
tag_at_put(which, JVM_CONSTANT_ClassIndex); |
|
226 |
*int_at_addr(which) = name_index; |
|
227 |
} |
|
228 |
||
229 |
// Temporary until actual use |
|
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230 |
void unresolved_klass_at_put(int which, Symbol* s) { |
1 | 231 |
release_tag_at_put(which, JVM_CONSTANT_UnresolvedClass); |
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232 |
slot_at_put(which, s); |
1 | 233 |
} |
234 |
||
5882 | 235 |
void method_handle_index_at_put(int which, int ref_kind, int ref_index) { |
236 |
tag_at_put(which, JVM_CONSTANT_MethodHandle); |
|
237 |
*int_at_addr(which) = ((jint) ref_index<<16) | ref_kind; |
|
238 |
} |
|
239 |
||
240 |
void method_type_index_at_put(int which, int ref_index) { |
|
241 |
tag_at_put(which, JVM_CONSTANT_MethodType); |
|
242 |
*int_at_addr(which) = ref_index; |
|
243 |
} |
|
244 |
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void invoke_dynamic_at_put(int which, int bootstrap_specifier_index, int name_and_type_index) { |
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tag_at_put(which, JVM_CONSTANT_InvokeDynamic); |
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*int_at_addr(which) = ((jint) name_and_type_index<<16) | bootstrap_specifier_index; |
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} |
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249 |
|
1 | 250 |
// Temporary until actual use |
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251 |
void unresolved_string_at_put(int which, Symbol* s) { |
1 | 252 |
release_tag_at_put(which, JVM_CONSTANT_UnresolvedString); |
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253 |
slot_at_put(which, s); |
1 | 254 |
} |
255 |
||
256 |
void int_at_put(int which, jint i) { |
|
257 |
tag_at_put(which, JVM_CONSTANT_Integer); |
|
258 |
*int_at_addr(which) = i; |
|
259 |
} |
|
260 |
||
261 |
void long_at_put(int which, jlong l) { |
|
262 |
tag_at_put(which, JVM_CONSTANT_Long); |
|
263 |
// *long_at_addr(which) = l; |
|
264 |
Bytes::put_native_u8((address)long_at_addr(which), *((u8*) &l)); |
|
265 |
} |
|
266 |
||
267 |
void float_at_put(int which, jfloat f) { |
|
268 |
tag_at_put(which, JVM_CONSTANT_Float); |
|
269 |
*float_at_addr(which) = f; |
|
270 |
} |
|
271 |
||
272 |
void double_at_put(int which, jdouble d) { |
|
273 |
tag_at_put(which, JVM_CONSTANT_Double); |
|
274 |
// *double_at_addr(which) = d; |
|
275 |
// u8 temp = *(u8*) &d; |
|
276 |
Bytes::put_native_u8((address) double_at_addr(which), *((u8*) &d)); |
|
277 |
} |
|
278 |
||
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279 |
Symbol** symbol_at_addr(int which) const { |
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280 |
assert(is_within_bounds(which), "index out of bounds"); |
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281 |
return (Symbol**) &base()[which]; |
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282 |
} |
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283 |
|
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284 |
void symbol_at_put(int which, Symbol* s) { |
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285 |
assert(s->refcount() != 0, "should have nonzero refcount"); |
1 | 286 |
tag_at_put(which, JVM_CONSTANT_Utf8); |
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287 |
slot_at_put(which, s); |
1 | 288 |
} |
289 |
||
290 |
void string_at_put(int which, oop str) { |
|
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// Overwrite the old index with a GC friendly value so |
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292 |
// that if G1 looks during the transition during oop_store it won't |
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293 |
// assert the symbol is not an oop. |
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294 |
*obj_at_addr_raw(which) = NULL; |
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295 |
assert(str != NULL, "resolved string shouldn't be null"); |
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|
296 |
obj_at_put(which, str); |
1 | 297 |
release_tag_at_put(which, JVM_CONSTANT_String); |
298 |
if (UseConcMarkSweepGC) { |
|
299 |
// In case the earlier card-mark was consumed by a concurrent |
|
300 |
// marking thread before the tag was updated, redirty the card. |
|
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|
301 |
obj_at_put_without_check(which, str); |
1 | 302 |
} |
303 |
} |
|
304 |
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305 |
void object_at_put(int which, oop str) { |
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306 |
obj_at_put(which, str); |
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307 |
release_tag_at_put(which, JVM_CONSTANT_Object); |
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308 |
if (UseConcMarkSweepGC) { |
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309 |
// In case the earlier card-mark was consumed by a concurrent |
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310 |
// marking thread before the tag was updated, redirty the card. |
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311 |
obj_at_put_without_check(which, str); |
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} |
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313 |
} |
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314 |
|
1 | 315 |
// For temporary use while constructing constant pool |
316 |
void string_index_at_put(int which, int string_index) { |
|
317 |
tag_at_put(which, JVM_CONSTANT_StringIndex); |
|
318 |
*int_at_addr(which) = string_index; |
|
319 |
} |
|
320 |
||
321 |
void field_at_put(int which, int class_index, int name_and_type_index) { |
|
322 |
tag_at_put(which, JVM_CONSTANT_Fieldref); |
|
323 |
*int_at_addr(which) = ((jint) name_and_type_index<<16) | class_index; |
|
324 |
} |
|
325 |
||
326 |
void method_at_put(int which, int class_index, int name_and_type_index) { |
|
327 |
tag_at_put(which, JVM_CONSTANT_Methodref); |
|
328 |
*int_at_addr(which) = ((jint) name_and_type_index<<16) | class_index; |
|
329 |
} |
|
330 |
||
331 |
void interface_method_at_put(int which, int class_index, int name_and_type_index) { |
|
332 |
tag_at_put(which, JVM_CONSTANT_InterfaceMethodref); |
|
333 |
*int_at_addr(which) = ((jint) name_and_type_index<<16) | class_index; // Not so nice |
|
334 |
} |
|
335 |
||
336 |
void name_and_type_at_put(int which, int name_index, int signature_index) { |
|
337 |
tag_at_put(which, JVM_CONSTANT_NameAndType); |
|
338 |
*int_at_addr(which) = ((jint) signature_index<<16) | name_index; // Not so nice |
|
339 |
} |
|
340 |
||
341 |
// Tag query |
|
342 |
||
343 |
constantTag tag_at(int which) const { return (constantTag)tags()->byte_at_acquire(which); } |
|
344 |
||
345 |
// Whether the entry is a pointer that must be GC'd. |
|
346 |
bool is_pointer_entry(int which) { |
|
347 |
constantTag tag = tag_at(which); |
|
348 |
return tag.is_klass() || |
|
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349 |
tag.is_string() || |
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|
350 |
tag.is_object(); |
1 | 351 |
} |
352 |
||
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353 |
// Whether the entry points to an object for ldc (resolved or not) |
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354 |
bool is_object_entry(int which) { |
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355 |
constantTag tag = tag_at(which); |
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|
356 |
return is_pointer_entry(which) || |
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357 |
tag.is_unresolved_klass() || |
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|
358 |
tag.is_unresolved_string() || |
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|
359 |
tag.is_symbol(); |
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|
360 |
} |
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|
361 |
|
1 | 362 |
// Fetching constants |
363 |
||
364 |
klassOop klass_at(int which, TRAPS) { |
|
365 |
constantPoolHandle h_this(THREAD, this); |
|
366 |
return klass_at_impl(h_this, which, CHECK_NULL); |
|
367 |
} |
|
368 |
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|
369 |
Symbol* klass_name_at(int which); // Returns the name, w/o resolving. |
1 | 370 |
|
371 |
klassOop resolved_klass_at(int which) { // Used by Compiler |
|
372 |
guarantee(tag_at(which).is_klass(), "Corrupted constant pool"); |
|
373 |
// Must do an acquire here in case another thread resolved the klass |
|
374 |
// behind our back, lest we later load stale values thru the oop. |
|
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|
375 |
return klassOop(CPSlot(OrderAccess::load_ptr_acquire(obj_at_addr_raw(which))).get_oop()); |
1 | 376 |
} |
377 |
||
378 |
// This method should only be used with a cpool lock or during parsing or gc |
|
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|
379 |
Symbol* unresolved_klass_at(int which) { // Temporary until actual use |
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|
380 |
Symbol* s = CPSlot(OrderAccess::load_ptr_acquire(obj_at_addr_raw(which))).get_symbol(); |
1 | 381 |
// check that the klass is still unresolved. |
382 |
assert(tag_at(which).is_unresolved_klass(), "Corrupted constant pool"); |
|
383 |
return s; |
|
384 |
} |
|
385 |
||
386 |
// RedefineClasses() API support: |
|
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|
387 |
Symbol* klass_at_noresolve(int which) { return klass_name_at(which); } |
1 | 388 |
|
389 |
jint int_at(int which) { |
|
390 |
assert(tag_at(which).is_int(), "Corrupted constant pool"); |
|
391 |
return *int_at_addr(which); |
|
392 |
} |
|
393 |
||
394 |
jlong long_at(int which) { |
|
395 |
assert(tag_at(which).is_long(), "Corrupted constant pool"); |
|
396 |
// return *long_at_addr(which); |
|
397 |
u8 tmp = Bytes::get_native_u8((address)&base()[which]); |
|
398 |
return *((jlong*)&tmp); |
|
399 |
} |
|
400 |
||
401 |
jfloat float_at(int which) { |
|
402 |
assert(tag_at(which).is_float(), "Corrupted constant pool"); |
|
403 |
return *float_at_addr(which); |
|
404 |
} |
|
405 |
||
406 |
jdouble double_at(int which) { |
|
407 |
assert(tag_at(which).is_double(), "Corrupted constant pool"); |
|
408 |
u8 tmp = Bytes::get_native_u8((address)&base()[which]); |
|
409 |
return *((jdouble*)&tmp); |
|
410 |
} |
|
411 |
||
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|
412 |
Symbol* symbol_at(int which) { |
1 | 413 |
assert(tag_at(which).is_utf8(), "Corrupted constant pool"); |
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|
414 |
return slot_at(which).get_symbol(); |
1 | 415 |
} |
416 |
||
417 |
oop string_at(int which, TRAPS) { |
|
418 |
constantPoolHandle h_this(THREAD, this); |
|
419 |
return string_at_impl(h_this, which, CHECK_NULL); |
|
420 |
} |
|
421 |
||
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422 |
oop object_at(int which) { |
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|
423 |
assert(tag_at(which).is_object(), "Corrupted constant pool"); |
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424 |
return slot_at(which).get_oop(); |
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425 |
} |
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|
426 |
|
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|
427 |
// A "pseudo-string" is an non-string oop that has found is way into |
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|
428 |
// a String entry. |
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|
429 |
// Under EnableInvokeDynamic this can happen if the user patches a live |
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|
430 |
// object into a CONSTANT_String entry of an anonymous class. |
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|
431 |
// Method oops internally created for method handles may also |
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|
432 |
// use pseudo-strings to link themselves to related metaobjects. |
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changeset
|
433 |
|
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|
434 |
bool is_pseudo_string_at(int which); |
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|
435 |
|
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|
436 |
oop pseudo_string_at(int which) { |
be2fc37a817f
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|
437 |
assert(tag_at(which).is_string(), "Corrupted constant pool"); |
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|
438 |
return slot_at(which).get_oop(); |
1550
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changeset
|
439 |
} |
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|
440 |
|
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|
441 |
void pseudo_string_at_put(int which, oop x) { |
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|
442 |
assert(EnableInvokeDynamic, ""); |
1550
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|
443 |
set_pseudo_string(); // mark header |
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|
444 |
assert(tag_at(which).is_string() || tag_at(which).is_unresolved_string(), "Corrupted constant pool"); |
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|
445 |
string_at_put(which, x); // this works just fine |
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changeset
|
446 |
} |
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|
447 |
|
1 | 448 |
// only called when we are sure a string entry is already resolved (via an |
449 |
// earlier string_at call. |
|
450 |
oop resolved_string_at(int which) { |
|
451 |
assert(tag_at(which).is_string(), "Corrupted constant pool"); |
|
452 |
// Must do an acquire here in case another thread resolved the klass |
|
453 |
// behind our back, lest we later load stale values thru the oop. |
|
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|
454 |
return CPSlot(OrderAccess::load_ptr_acquire(obj_at_addr_raw(which))).get_oop(); |
1 | 455 |
} |
456 |
||
457 |
// This method should only be used with a cpool lock or during parsing or gc |
|
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|
458 |
Symbol* unresolved_string_at(int which) { // Temporary until actual use |
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|
459 |
Symbol* s = CPSlot(OrderAccess::load_ptr_acquire(obj_at_addr_raw(which))).get_symbol(); |
1 | 460 |
// check that the string is still unresolved. |
461 |
assert(tag_at(which).is_unresolved_string(), "Corrupted constant pool"); |
|
462 |
return s; |
|
463 |
} |
|
464 |
||
465 |
// Returns an UTF8 for a CONSTANT_String entry at a given index. |
|
466 |
// UTF8 char* representation was chosen to avoid conversion of |
|
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|
467 |
// java_lang_Strings at resolved entries into Symbol*s |
1 | 468 |
// or vice versa. |
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|
469 |
// Caller is responsible for checking for pseudo-strings. |
1 | 470 |
char* string_at_noresolve(int which); |
471 |
||
472 |
jint name_and_type_at(int which) { |
|
473 |
assert(tag_at(which).is_name_and_type(), "Corrupted constant pool"); |
|
474 |
return *int_at_addr(which); |
|
475 |
} |
|
476 |
||
5882 | 477 |
int method_handle_ref_kind_at(int which) { |
478 |
assert(tag_at(which).is_method_handle(), "Corrupted constant pool"); |
|
479 |
return extract_low_short_from_int(*int_at_addr(which)); // mask out unwanted ref_index bits |
|
480 |
} |
|
481 |
int method_handle_index_at(int which) { |
|
482 |
assert(tag_at(which).is_method_handle(), "Corrupted constant pool"); |
|
483 |
return extract_high_short_from_int(*int_at_addr(which)); // shift out unwanted ref_kind bits |
|
484 |
} |
|
485 |
int method_type_index_at(int which) { |
|
486 |
assert(tag_at(which).is_method_type(), "Corrupted constant pool"); |
|
487 |
return *int_at_addr(which); |
|
488 |
} |
|
489 |
// Derived queries: |
|
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changeset
|
490 |
Symbol* method_handle_name_ref_at(int which) { |
5882 | 491 |
int member = method_handle_index_at(which); |
492 |
return impl_name_ref_at(member, true); |
|
493 |
} |
|
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changeset
|
494 |
Symbol* method_handle_signature_ref_at(int which) { |
5882 | 495 |
int member = method_handle_index_at(which); |
496 |
return impl_signature_ref_at(member, true); |
|
497 |
} |
|
498 |
int method_handle_klass_index_at(int which) { |
|
499 |
int member = method_handle_index_at(which); |
|
500 |
return impl_klass_ref_index_at(member, true); |
|
501 |
} |
|
8076
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changeset
|
502 |
Symbol* method_type_signature_at(int which) { |
5882 | 503 |
int sym = method_type_index_at(which); |
504 |
return symbol_at(sym); |
|
505 |
} |
|
7114
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|
506 |
|
7436
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changeset
|
507 |
int invoke_dynamic_name_and_type_ref_index_at(int which) { |
7114
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changeset
|
508 |
assert(tag_at(which).is_invoke_dynamic(), "Corrupted constant pool"); |
7436
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changeset
|
509 |
return extract_high_short_from_int(*int_at_addr(which)); |
7114
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changeset
|
510 |
} |
7436
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changeset
|
511 |
int invoke_dynamic_bootstrap_specifier_index(int which) { |
dbc43da3d512
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changeset
|
512 |
assert(tag_at(which).value() == JVM_CONSTANT_InvokeDynamic, "Corrupted constant pool"); |
dbc43da3d512
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changeset
|
513 |
return extract_low_short_from_int(*int_at_addr(which)); |
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|
514 |
} |
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|
515 |
int invoke_dynamic_operand_base(int which) { |
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
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changeset
|
516 |
int bootstrap_specifier_index = invoke_dynamic_bootstrap_specifier_index(which); |
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
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changeset
|
517 |
return operand_offset_at(operands(), bootstrap_specifier_index); |
7114
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|
518 |
} |
7436
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changeset
|
519 |
// The first part of the operands array consists of an index into the second part. |
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
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changeset
|
520 |
// Extract a 32-bit index value from the first part. |
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
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changeset
|
521 |
static int operand_offset_at(typeArrayOop operands, int bootstrap_specifier_index) { |
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
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changeset
|
522 |
int n = (bootstrap_specifier_index * 2); |
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
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changeset
|
523 |
assert(n >= 0 && n+2 <= operands->length(), "oob"); |
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
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diff
changeset
|
524 |
// The first 32-bit index points to the beginning of the second part |
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
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diff
changeset
|
525 |
// of the operands array. Make sure this index is in the first part. |
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
7397
diff
changeset
|
526 |
DEBUG_ONLY(int second_part = build_int_from_shorts(operands->short_at(0), |
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
7397
diff
changeset
|
527 |
operands->short_at(1))); |
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
7397
diff
changeset
|
528 |
assert(second_part == 0 || n+2 <= second_part, "oob (2)"); |
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
7397
diff
changeset
|
529 |
int offset = build_int_from_shorts(operands->short_at(n+0), |
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
7397
diff
changeset
|
530 |
operands->short_at(n+1)); |
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
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7397
diff
changeset
|
531 |
// The offset itself must point into the second part of the array. |
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
7397
diff
changeset
|
532 |
assert(offset == 0 || offset >= second_part && offset <= operands->length(), "oob (3)"); |
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
7397
diff
changeset
|
533 |
return offset; |
7114
65d21c4c6337
6984311: JSR 292 needs optional bootstrap method parameters
jrose
parents:
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diff
changeset
|
534 |
} |
7436
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
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7397
diff
changeset
|
535 |
static void operand_offset_at_put(typeArrayOop operands, int bootstrap_specifier_index, int offset) { |
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
7397
diff
changeset
|
536 |
int n = bootstrap_specifier_index * 2; |
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
7397
diff
changeset
|
537 |
assert(n >= 0 && n+2 <= operands->length(), "oob"); |
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
7397
diff
changeset
|
538 |
operands->short_at_put(n+0, extract_low_short_from_int(offset)); |
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
7397
diff
changeset
|
539 |
operands->short_at_put(n+1, extract_high_short_from_int(offset)); |
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
7397
diff
changeset
|
540 |
} |
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
7397
diff
changeset
|
541 |
static int operand_array_length(typeArrayOop operands) { |
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
7397
diff
changeset
|
542 |
if (operands == NULL || operands->length() == 0) return 0; |
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
7397
diff
changeset
|
543 |
int second_part = operand_offset_at(operands, 0); |
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
7397
diff
changeset
|
544 |
return (second_part / 2); |
7114
65d21c4c6337
6984311: JSR 292 needs optional bootstrap method parameters
jrose
parents:
7111
diff
changeset
|
545 |
} |
65d21c4c6337
6984311: JSR 292 needs optional bootstrap method parameters
jrose
parents:
7111
diff
changeset
|
546 |
|
7436
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
7397
diff
changeset
|
547 |
#ifdef ASSERT |
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
7397
diff
changeset
|
548 |
// operand tuples fit together exactly, end to end |
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
7397
diff
changeset
|
549 |
static int operand_limit_at(typeArrayOop operands, int bootstrap_specifier_index) { |
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
7397
diff
changeset
|
550 |
int nextidx = bootstrap_specifier_index + 1; |
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
7397
diff
changeset
|
551 |
if (nextidx == operand_array_length(operands)) |
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
7397
diff
changeset
|
552 |
return operands->length(); |
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
7397
diff
changeset
|
553 |
else |
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
7397
diff
changeset
|
554 |
return operand_offset_at(operands, nextidx); |
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
7397
diff
changeset
|
555 |
} |
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
7397
diff
changeset
|
556 |
int invoke_dynamic_operand_limit(int which) { |
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
7397
diff
changeset
|
557 |
int bootstrap_specifier_index = invoke_dynamic_bootstrap_specifier_index(which); |
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
7397
diff
changeset
|
558 |
return operand_limit_at(operands(), bootstrap_specifier_index); |
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
7397
diff
changeset
|
559 |
} |
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
7397
diff
changeset
|
560 |
#endif //ASSERT |
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
7397
diff
changeset
|
561 |
|
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
7397
diff
changeset
|
562 |
// layout of InvokeDynamic bootstrap method specifier (in second part of operands array): |
7114
65d21c4c6337
6984311: JSR 292 needs optional bootstrap method parameters
jrose
parents:
7111
diff
changeset
|
563 |
enum { |
65d21c4c6337
6984311: JSR 292 needs optional bootstrap method parameters
jrose
parents:
7111
diff
changeset
|
564 |
_indy_bsm_offset = 0, // CONSTANT_MethodHandle bsm |
7436
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
7397
diff
changeset
|
565 |
_indy_argc_offset = 1, // u2 argc |
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
7397
diff
changeset
|
566 |
_indy_argv_offset = 2 // u2 argv[argc] |
7114
65d21c4c6337
6984311: JSR 292 needs optional bootstrap method parameters
jrose
parents:
7111
diff
changeset
|
567 |
}; |
6062
bab93afe9df7
6964498: JSR 292 invokedynamic sites need local bootstrap methods
jrose
parents:
5882
diff
changeset
|
568 |
int invoke_dynamic_bootstrap_method_ref_index_at(int which) { |
bab93afe9df7
6964498: JSR 292 invokedynamic sites need local bootstrap methods
jrose
parents:
5882
diff
changeset
|
569 |
assert(tag_at(which).is_invoke_dynamic(), "Corrupted constant pool"); |
7436
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
7397
diff
changeset
|
570 |
int op_base = invoke_dynamic_operand_base(which); |
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
7397
diff
changeset
|
571 |
return operands()->short_at(op_base + _indy_bsm_offset); |
7114
65d21c4c6337
6984311: JSR 292 needs optional bootstrap method parameters
jrose
parents:
7111
diff
changeset
|
572 |
} |
65d21c4c6337
6984311: JSR 292 needs optional bootstrap method parameters
jrose
parents:
7111
diff
changeset
|
573 |
int invoke_dynamic_argument_count_at(int which) { |
65d21c4c6337
6984311: JSR 292 needs optional bootstrap method parameters
jrose
parents:
7111
diff
changeset
|
574 |
assert(tag_at(which).is_invoke_dynamic(), "Corrupted constant pool"); |
7436
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
7397
diff
changeset
|
575 |
int op_base = invoke_dynamic_operand_base(which); |
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
7397
diff
changeset
|
576 |
int argc = operands()->short_at(op_base + _indy_argc_offset); |
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
7397
diff
changeset
|
577 |
DEBUG_ONLY(int end_offset = op_base + _indy_argv_offset + argc; |
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
7397
diff
changeset
|
578 |
int next_offset = invoke_dynamic_operand_limit(which)); |
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|
579 |
assert(end_offset == next_offset, "matched ending"); |
7114
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|
580 |
return argc; |
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changeset
|
581 |
} |
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changeset
|
582 |
int invoke_dynamic_argument_index_at(int which, int j) { |
7436
dbc43da3d512
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|
583 |
int op_base = invoke_dynamic_operand_base(which); |
dbc43da3d512
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|
584 |
DEBUG_ONLY(int argc = operands()->short_at(op_base + _indy_argc_offset)); |
dbc43da3d512
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|
585 |
assert((uint)j < (uint)argc, "oob"); |
dbc43da3d512
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|
586 |
return operands()->short_at(op_base + _indy_argv_offset + j); |
6062
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|
587 |
} |
5882 | 588 |
|
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|
589 |
// The following methods (name/signature/klass_ref_at, klass_ref_at_noresolve, |
4429
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|
590 |
// name_and_type_ref_index_at) all expect to be passed indices obtained |
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|
591 |
// directly from the bytecode. |
4429
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|
592 |
// If the indices are meant to refer to fields or methods, they are |
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|
593 |
// actually rewritten constant pool cache indices. |
4429
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changeset
|
594 |
// The routine remap_instruction_operand_from_cache manages the adjustment |
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|
595 |
// of these values back to constant pool indices. |
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|
596 |
|
4429
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changeset
|
597 |
// There are also "uncached" versions which do not adjust the operand index; see below. |
1 | 598 |
|
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|
599 |
// FIXME: Consider renaming these with a prefix "cached_" to make the distinction clear. |
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|
600 |
// In a few cases (the verifier) there are uses before a cpcache has been built, |
ac1a0346bc0f
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changeset
|
601 |
// which are handled by a dynamic check in remap_instruction_operand_from_cache. |
ac1a0346bc0f
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|
602 |
// FIXME: Remove the dynamic check, and adjust all callers to specify the correct mode. |
ac1a0346bc0f
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changeset
|
603 |
|
1 | 604 |
// Lookup for entries consisting of (klass_index, name_and_type index) |
605 |
klassOop klass_ref_at(int which, TRAPS); |
|
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|
606 |
Symbol* klass_ref_at_noresolve(int which); |
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6990754: Use native memory and reference counting to implement SymbolTable
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changeset
|
607 |
Symbol* name_ref_at(int which) { return impl_name_ref_at(which, false); } |
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|
608 |
Symbol* signature_ref_at(int which) { return impl_signature_ref_at(which, false); } |
1 | 609 |
|
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|
610 |
int klass_ref_index_at(int which) { return impl_klass_ref_index_at(which, false); } |
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|
611 |
int name_and_type_ref_index_at(int which) { return impl_name_and_type_ref_index_at(which, false); } |
1 | 612 |
|
613 |
// Lookup for entries consisting of (name_index, signature_index) |
|
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|
614 |
int name_ref_index_at(int which_nt); // == low-order jshort of name_and_type_at(which_nt) |
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|
615 |
int signature_ref_index_at(int which_nt); // == high-order jshort of name_and_type_at(which_nt) |
1 | 616 |
|
617 |
BasicType basic_type_for_signature_at(int which); |
|
618 |
||
619 |
// Resolve string constants (to prevent allocation during compilation) |
|
620 |
void resolve_string_constants(TRAPS) { |
|
621 |
constantPoolHandle h_this(THREAD, this); |
|
622 |
resolve_string_constants_impl(h_this, CHECK); |
|
623 |
} |
|
624 |
||
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changeset
|
625 |
private: |
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diff
changeset
|
626 |
enum { _no_index_sentinel = -1, _possible_index_sentinel = -2 }; |
65d21c4c6337
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changeset
|
627 |
public: |
65d21c4c6337
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jrose
parents:
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diff
changeset
|
628 |
|
5882 | 629 |
// Resolve late bound constants. |
630 |
oop resolve_constant_at(int index, TRAPS) { |
|
631 |
constantPoolHandle h_this(THREAD, this); |
|
7114
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changeset
|
632 |
return resolve_constant_at_impl(h_this, index, _no_index_sentinel, THREAD); |
5882 | 633 |
} |
634 |
||
635 |
oop resolve_cached_constant_at(int cache_index, TRAPS) { |
|
636 |
constantPoolHandle h_this(THREAD, this); |
|
7114
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changeset
|
637 |
return resolve_constant_at_impl(h_this, _no_index_sentinel, cache_index, THREAD); |
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changeset
|
638 |
} |
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parents:
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diff
changeset
|
639 |
|
65d21c4c6337
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changeset
|
640 |
oop resolve_possibly_cached_constant_at(int pool_index, TRAPS) { |
65d21c4c6337
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changeset
|
641 |
constantPoolHandle h_this(THREAD, this); |
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diff
changeset
|
642 |
return resolve_constant_at_impl(h_this, pool_index, _possible_index_sentinel, THREAD); |
5882 | 643 |
} |
644 |
||
13391
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changeset
|
645 |
oop resolve_bootstrap_specifier_at(int index, TRAPS) { |
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changeset
|
646 |
constantPoolHandle h_this(THREAD, this); |
30245956af37
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changeset
|
647 |
return resolve_bootstrap_specifier_at_impl(h_this, index, THREAD); |
30245956af37
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diff
changeset
|
648 |
} |
30245956af37
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changeset
|
649 |
|
1 | 650 |
// Klass name matches name at offset |
651 |
bool klass_name_at_matches(instanceKlassHandle k, int which); |
|
652 |
||
653 |
// Sizing |
|
360
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1
diff
changeset
|
654 |
int length() const { return _length; } |
21d113ecbf6a
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coleenp
parents:
1
diff
changeset
|
655 |
void set_length(int length) { _length = length; } |
21d113ecbf6a
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
1
diff
changeset
|
656 |
|
21d113ecbf6a
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
1
diff
changeset
|
657 |
// Tells whether index is within bounds. |
21d113ecbf6a
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
1
diff
changeset
|
658 |
bool is_within_bounds(int index) const { |
21d113ecbf6a
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
1
diff
changeset
|
659 |
return 0 <= index && index < length(); |
21d113ecbf6a
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
1
diff
changeset
|
660 |
} |
21d113ecbf6a
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
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parents:
1
diff
changeset
|
661 |
|
1 | 662 |
static int header_size() { return sizeof(constantPoolOopDesc)/HeapWordSize; } |
663 |
static int object_size(int length) { return align_object_size(header_size() + length); } |
|
664 |
int object_size() { return object_size(length()); } |
|
665 |
||
1894
5c343868d071
6692899: CMS: many vm.parallel_class_loading tests fail with assert "missing Printezis mark"
jmasa
parents:
1550
diff
changeset
|
666 |
bool is_conc_safe() { return _is_conc_safe; } |
5c343868d071
6692899: CMS: many vm.parallel_class_loading tests fail with assert "missing Printezis mark"
jmasa
parents:
1550
diff
changeset
|
667 |
void set_is_conc_safe(bool v) { _is_conc_safe = v; } |
5c343868d071
6692899: CMS: many vm.parallel_class_loading tests fail with assert "missing Printezis mark"
jmasa
parents:
1550
diff
changeset
|
668 |
|
1 | 669 |
friend class constantPoolKlass; |
670 |
friend class ClassFileParser; |
|
671 |
friend class SystemDictionary; |
|
672 |
||
673 |
// Used by compiler to prevent classloading. |
|
13391
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twisti
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13195
diff
changeset
|
674 |
static methodOop method_at_if_loaded (constantPoolHandle this_oop, int which); |
30245956af37
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13195
diff
changeset
|
675 |
static bool has_appendix_at_if_loaded (constantPoolHandle this_oop, int which); |
30245956af37
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13195
diff
changeset
|
676 |
static oop appendix_at_if_loaded (constantPoolHandle this_oop, int which); |
30245956af37
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13195
diff
changeset
|
677 |
static klassOop klass_at_if_loaded (constantPoolHandle this_oop, int which); |
30245956af37
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twisti
parents:
13195
diff
changeset
|
678 |
static klassOop klass_ref_at_if_loaded (constantPoolHandle this_oop, int which); |
1 | 679 |
// Same as above - but does LinkResolving. |
13391
30245956af37
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twisti
parents:
13195
diff
changeset
|
680 |
static klassOop klass_ref_at_if_loaded_check(constantPoolHandle this_oop, int which, TRAPS); |
1 | 681 |
|
682 |
// Routines currently used for annotations (only called by jvm.cpp) but which might be used in the |
|
7111
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6981788: GC map generator sometimes picks up the wrong kind of instruction operand
jrose
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diff
changeset
|
683 |
// future by other Java code. These take constant pool indices rather than |
1 | 684 |
// constant pool cache indices as do the peer methods above. |
8076
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
7436
diff
changeset
|
685 |
Symbol* uncached_klass_ref_at_noresolve(int which); |
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
7436
diff
changeset
|
686 |
Symbol* uncached_name_ref_at(int which) { return impl_name_ref_at(which, true); } |
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
7436
diff
changeset
|
687 |
Symbol* uncached_signature_ref_at(int which) { return impl_signature_ref_at(which, true); } |
2570
ecc7862946d4
6655646: dynamic languages need dynamically linked call sites
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diff
changeset
|
688 |
int uncached_klass_ref_index_at(int which) { return impl_klass_ref_index_at(which, true); } |
ecc7862946d4
6655646: dynamic languages need dynamically linked call sites
jrose
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2105
diff
changeset
|
689 |
int uncached_name_and_type_ref_index_at(int which) { return impl_name_and_type_ref_index_at(which, true); } |
1 | 690 |
|
691 |
// Sharing |
|
692 |
int pre_resolve_shared_klasses(TRAPS); |
|
8076
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
7436
diff
changeset
|
693 |
void shared_symbols_iterate(SymbolClosure* closure0); |
1 | 694 |
void shared_tags_iterate(OopClosure* closure0); |
695 |
void shared_strings_iterate(OopClosure* closure0); |
|
696 |
||
697 |
// Debugging |
|
698 |
const char* printable_name_at(int which) PRODUCT_RETURN0; |
|
699 |
||
5688 | 700 |
#ifdef ASSERT |
701 |
enum { CPCACHE_INDEX_TAG = 0x10000 }; // helps keep CP cache indices distinct from CP indices |
|
5882 | 702 |
#else |
703 |
enum { CPCACHE_INDEX_TAG = 0 }; // in product mode, this zero value is a no-op |
|
5688 | 704 |
#endif //ASSERT |
705 |
||
13391
30245956af37
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13195
diff
changeset
|
706 |
static int get_cpcache_index(int index) { return index - CPCACHE_INDEX_TAG; } |
30245956af37
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13195
diff
changeset
|
707 |
|
1 | 708 |
private: |
709 |
||
8076
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
7436
diff
changeset
|
710 |
Symbol* impl_name_ref_at(int which, bool uncached); |
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
7436
diff
changeset
|
711 |
Symbol* impl_signature_ref_at(int which, bool uncached); |
2570
ecc7862946d4
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
2105
diff
changeset
|
712 |
int impl_klass_ref_index_at(int which, bool uncached); |
ecc7862946d4
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
2105
diff
changeset
|
713 |
int impl_name_and_type_ref_index_at(int which, bool uncached); |
ecc7862946d4
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
2105
diff
changeset
|
714 |
|
5688 | 715 |
int remap_instruction_operand_from_cache(int operand); // operand must be biased by CPCACHE_INDEX_TAG |
1 | 716 |
|
717 |
// Used while constructing constant pool (only by ClassFileParser) |
|
718 |
jint klass_index_at(int which) { |
|
719 |
assert(tag_at(which).is_klass_index(), "Corrupted constant pool"); |
|
720 |
return *int_at_addr(which); |
|
721 |
} |
|
722 |
||
723 |
jint string_index_at(int which) { |
|
724 |
assert(tag_at(which).is_string_index(), "Corrupted constant pool"); |
|
725 |
return *int_at_addr(which); |
|
726 |
} |
|
727 |
||
728 |
// Performs the LinkResolver checks |
|
729 |
static void verify_constant_pool_resolve(constantPoolHandle this_oop, KlassHandle klass, TRAPS); |
|
730 |
||
731 |
// Implementation of methods that needs an exposed 'this' pointer, in order to |
|
732 |
// handle GC while executing the method |
|
733 |
static klassOop klass_at_impl(constantPoolHandle this_oop, int which, TRAPS); |
|
734 |
static oop string_at_impl(constantPoolHandle this_oop, int which, TRAPS); |
|
735 |
||
736 |
// Resolve string constants (to prevent allocation during compilation) |
|
737 |
static void resolve_string_constants_impl(constantPoolHandle this_oop, TRAPS); |
|
738 |
||
5882 | 739 |
static oop resolve_constant_at_impl(constantPoolHandle this_oop, int index, int cache_index, TRAPS); |
13391
30245956af37
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13195
diff
changeset
|
740 |
static oop resolve_bootstrap_specifier_at_impl(constantPoolHandle this_oop, int index, TRAPS); |
5882 | 741 |
|
1 | 742 |
public: |
743 |
// Merging constantPoolOop support: |
|
744 |
bool compare_entry_to(int index1, constantPoolHandle cp2, int index2, TRAPS); |
|
7436
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
7397
diff
changeset
|
745 |
void copy_cp_to(int start_i, int end_i, constantPoolHandle to_cp, int to_i, TRAPS) { |
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
7397
diff
changeset
|
746 |
constantPoolHandle h_this(THREAD, this); |
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
7397
diff
changeset
|
747 |
copy_cp_to_impl(h_this, start_i, end_i, to_cp, to_i, THREAD); |
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
7397
diff
changeset
|
748 |
} |
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
7397
diff
changeset
|
749 |
static void copy_cp_to_impl(constantPoolHandle from_cp, int start_i, int end_i, constantPoolHandle to_cp, int to_i, TRAPS); |
dbc43da3d512
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
parents:
7397
diff
changeset
|
750 |
static void copy_entry_to(constantPoolHandle from_cp, int from_i, constantPoolHandle to_cp, int to_i, TRAPS); |
1 | 751 |
int find_matching_entry(int pattern_i, constantPoolHandle search_cp, TRAPS); |
752 |
int orig_length() const { return _orig_length; } |
|
753 |
void set_orig_length(int orig_length) { _orig_length = orig_length; } |
|
754 |
||
8076
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
7436
diff
changeset
|
755 |
// Decrease ref counts of symbols that are in the constant pool |
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
7436
diff
changeset
|
756 |
// when the holder class is unloaded |
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
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parents:
7436
diff
changeset
|
757 |
void unreference_symbols(); |
1 | 758 |
|
759 |
// JVMTI accesss - GetConstantPool, RetransformClasses, ... |
|
760 |
friend class JvmtiConstantPoolReconstituter; |
|
761 |
||
762 |
private: |
|
763 |
jint cpool_entry_size(jint idx); |
|
764 |
jint hash_entries_to(SymbolHashMap *symmap, SymbolHashMap *classmap); |
|
765 |
||
766 |
// Copy cpool bytes into byte array. |
|
767 |
// Returns: |
|
768 |
// int > 0, count of the raw cpool bytes that have been copied |
|
769 |
// 0, OutOfMemory error |
|
770 |
// -1, Internal error |
|
771 |
int copy_cpool_bytes(int cpool_size, |
|
772 |
SymbolHashMap* tbl, |
|
773 |
unsigned char *bytes); |
|
774 |
}; |
|
775 |
||
13195 | 776 |
class SymbolHashMapEntry : public CHeapObj<mtSymbol> { |
1 | 777 |
private: |
778 |
unsigned int _hash; // 32-bit hash for item |
|
779 |
SymbolHashMapEntry* _next; // Next element in the linked list for this bucket |
|
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6990754: Use native memory and reference counting to implement SymbolTable
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parents:
7436
diff
changeset
|
780 |
Symbol* _symbol; // 1-st part of the mapping: symbol => value |
1 | 781 |
u2 _value; // 2-nd part of the mapping: symbol => value |
782 |
||
783 |
public: |
|
784 |
unsigned int hash() const { return _hash; } |
|
785 |
void set_hash(unsigned int hash) { _hash = hash; } |
|
786 |
||
787 |
SymbolHashMapEntry* next() const { return _next; } |
|
788 |
void set_next(SymbolHashMapEntry* next) { _next = next; } |
|
789 |
||
8076
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6990754: Use native memory and reference counting to implement SymbolTable
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parents:
7436
diff
changeset
|
790 |
Symbol* symbol() const { return _symbol; } |
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
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parents:
7436
diff
changeset
|
791 |
void set_symbol(Symbol* sym) { _symbol = sym; } |
1 | 792 |
|
793 |
u2 value() const { return _value; } |
|
794 |
void set_value(u2 value) { _value = value; } |
|
795 |
||
8076
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
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parents:
7436
diff
changeset
|
796 |
SymbolHashMapEntry(unsigned int hash, Symbol* symbol, u2 value) |
1 | 797 |
: _hash(hash), _symbol(symbol), _value(value), _next(NULL) {} |
798 |
||
799 |
}; // End SymbolHashMapEntry class |
|
800 |
||
801 |
||
13195 | 802 |
class SymbolHashMapBucket : public CHeapObj<mtSymbol> { |
1 | 803 |
|
804 |
private: |
|
805 |
SymbolHashMapEntry* _entry; |
|
806 |
||
807 |
public: |
|
808 |
SymbolHashMapEntry* entry() const { return _entry; } |
|
809 |
void set_entry(SymbolHashMapEntry* entry) { _entry = entry; } |
|
810 |
void clear() { _entry = NULL; } |
|
811 |
||
812 |
}; // End SymbolHashMapBucket class |
|
813 |
||
814 |
||
13195 | 815 |
class SymbolHashMap: public CHeapObj<mtSymbol> { |
1 | 816 |
|
817 |
private: |
|
818 |
// Default number of entries in the table |
|
819 |
enum SymbolHashMap_Constants { |
|
820 |
_Def_HashMap_Size = 256 |
|
821 |
}; |
|
822 |
||
823 |
int _table_size; |
|
824 |
SymbolHashMapBucket* _buckets; |
|
825 |
||
826 |
void initialize_table(int table_size) { |
|
827 |
_table_size = table_size; |
|
13195 | 828 |
_buckets = NEW_C_HEAP_ARRAY(SymbolHashMapBucket, table_size, mtSymbol); |
1 | 829 |
for (int index = 0; index < table_size; index++) { |
830 |
_buckets[index].clear(); |
|
831 |
} |
|
832 |
} |
|
833 |
||
834 |
public: |
|
835 |
||
836 |
int table_size() const { return _table_size; } |
|
837 |
||
838 |
SymbolHashMap() { initialize_table(_Def_HashMap_Size); } |
|
839 |
SymbolHashMap(int table_size) { initialize_table(table_size); } |
|
840 |
||
841 |
// hash P(31) from Kernighan & Ritchie |
|
842 |
static unsigned int compute_hash(const char* str, int len) { |
|
843 |
unsigned int hash = 0; |
|
844 |
while (len-- > 0) { |
|
845 |
hash = 31*hash + (unsigned) *str; |
|
846 |
str++; |
|
847 |
} |
|
848 |
return hash; |
|
849 |
} |
|
850 |
||
851 |
SymbolHashMapEntry* bucket(int i) { |
|
852 |
return _buckets[i].entry(); |
|
853 |
} |
|
854 |
||
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6990754: Use native memory and reference counting to implement SymbolTable
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parents:
7436
diff
changeset
|
855 |
void add_entry(Symbol* sym, u2 value); |
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
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parents:
7436
diff
changeset
|
856 |
SymbolHashMapEntry* find_entry(Symbol* sym); |
1 | 857 |
|
8076
96d498ec7ae1
6990754: Use native memory and reference counting to implement SymbolTable
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parents:
7436
diff
changeset
|
858 |
u2 symbol_to_value(Symbol* sym) { |
1 | 859 |
SymbolHashMapEntry *entry = find_entry(sym); |
860 |
return (entry == NULL) ? 0 : entry->value(); |
|
861 |
} |
|
862 |
||
863 |
~SymbolHashMap() { |
|
864 |
SymbolHashMapEntry* next; |
|
865 |
for (int i = 0; i < _table_size; i++) { |
|
866 |
for (SymbolHashMapEntry* cur = bucket(i); cur != NULL; cur = next) { |
|
867 |
next = cur->next(); |
|
868 |
delete(cur); |
|
869 |
} |
|
870 |
} |
|
871 |
delete _buckets; |
|
872 |
} |
|
873 |
}; // End SymbolHashMap class |
|
7397 | 874 |
|
875 |
#endif // SHARE_VM_OOPS_CONSTANTPOOLOOP_HPP |