#include "precompiled.hpp"

#include "classfile/javaClasses.hpp"

#include "gc_implementation/shared/markSweep.inline.hpp"

#include "gc_interface/collectedHeap.inline.hpp"

#include "memory/oopFactory.hpp"

#include "memory/permGen.hpp"

#include "memory/universe.inline.hpp"

#include "oops/constantPoolKlass.hpp"

#include "oops/constantPoolOop.hpp"

#include "oops/oop.inline.hpp"

#include "oops/oop.inline2.hpp"

#include "oops/symbol.hpp"

#include "runtime/handles.inline.hpp"

#ifdef TARGET_OS_FAMILY_linux

# include "thread_linux.inline.hpp"

#endif

#ifdef TARGET_OS_FAMILY_solaris

# include "thread_solaris.inline.hpp"

#endif

#ifdef TARGET_OS_FAMILY_windows

# include "thread_windows.inline.hpp"

#endif

#ifdef TARGET_OS_FAMILY_bsd

# include "thread_bsd.inline.hpp"

#endif

#ifndef SERIALGC

#include "gc_implementation/parNew/parOopClosures.inline.hpp"

#include "gc_implementation/parallelScavenge/psPromotionManager.inline.hpp"

#include "gc_implementation/parallelScavenge/psScavenge.inline.hpp"

#include "memory/cardTableRS.hpp"

#include "oops/oop.pcgc.inline.hpp"

#endif

constantPoolOop constantPoolKlass::allocate(int length, bool is_conc_safe, TRAPS) {

int size = constantPoolOopDesc::object_size(length);

KlassHandle klass (THREAD, as_klassOop());

assert(klass()->is_oop(), "Can't be null, else handlizing of c below won't work");

constantPoolHandle pool;

{

constantPoolOop c =

(constantPoolOop)CollectedHeap::permanent_obj_allocate(klass, size, CHECK_NULL);

assert(c->klass_or_null() != NULL, "Handlizing below won't work");

pool = constantPoolHandle(THREAD, c);

}

pool->set_length(length);

pool->set_tags(NULL);

pool->set_cache(NULL);

pool->set_operands(NULL);

pool->set_pool_holder(NULL);

pool->set_flags(0);

// only set to non-zero if constant pool is merged by RedefineClasses

pool->set_orig_length(0);

// if constant pool may change during RedefineClasses, it is created

// unsafe for GC concurrent processing.

pool->set_is_conc_safe(is_conc_safe);

// all fields are initialized; needed for GC

// Note: because we may be in this "conc_unsafe" state when allocating

// t_oop below, which may in turn cause a GC, it is imperative that our

// size be correct, consistent and henceforth stable, at this stage.

assert(pool->is_oop() && pool->is_parsable(), "Else size() below is unreliable");

assert(size == pool->size(), "size() is wrong");

// initialize tag array

typeArrayOop t_oop = oopFactory::new_permanent_byteArray(length, CHECK_NULL);

typeArrayHandle tags (THREAD, t_oop);

for (int index = 0; index < length; index++) {

tags()->byte_at_put(index, JVM_CONSTANT_Invalid);

}

pool->set_tags(tags());

// Check that our size was stable at its old value.

assert(size == pool->size(), "size() changed");

return pool();

}

klassOop constantPoolKlass::create_klass(TRAPS) {

constantPoolKlass o;

KlassHandle h_this_klass(THREAD, Universe::klassKlassObj());

KlassHandle k = base_create_klass(h_this_klass, header_size(), o.vtbl_value(), CHECK_NULL);

// Make sure size calculation is right

assert(k()->size() == align_object_size(header_size()), "wrong size for object");

java_lang_Class::create_mirror(k, CHECK_NULL); // Allocate mirror

return k();

}

int constantPoolKlass::oop_size(oop obj) const {

assert(obj->is_constantPool(), "must be constantPool");

return constantPoolOop(obj)->object_size();

}

void constantPoolKlass::oop_follow_contents(oop obj) {

assert (obj->is_constantPool(), "obj must be constant pool");

constantPoolOop cp = (constantPoolOop) obj;

// Performance tweak: We skip iterating over the klass pointer since we

// know that Universe::constantPoolKlassObj never moves.

// If the tags array is null we are in the middle of allocating this constant pool

if (cp->tags() != NULL) {

// gc of constant pool contents

oop* base = (oop*)cp->base();

for (int i = 0; i < cp->length(); i++) {

if (cp->is_pointer_entry(i)) {

if (*base != NULL) MarkSweep::mark_and_push(base);

}

base++;

}

// gc of constant pool instance variables

MarkSweep::mark_and_push(cp->tags_addr());

MarkSweep::mark_and_push(cp->cache_addr());

MarkSweep::mark_and_push(cp->operands_addr());

MarkSweep::mark_and_push(cp->pool_holder_addr());

}

}

#ifndef SERIALGC

void constantPoolKlass::oop_follow_contents(ParCompactionManager* cm,

oop obj) {

assert (obj->is_constantPool(), "obj must be constant pool");

constantPoolOop cp = (constantPoolOop) obj;

// Performance tweak: We skip iterating over the klass pointer since we

// know that Universe::constantPoolKlassObj never moves.

// If the tags array is null we are in the middle of allocating this constant

// pool.

if (cp->tags() != NULL) {

// gc of constant pool contents

oop* base = (oop*)cp->base();

for (int i = 0; i < cp->length(); i++) {

if (cp->is_pointer_entry(i)) {

if (*base != NULL) PSParallelCompact::mark_and_push(cm, base);

}

base++;

}

// gc of constant pool instance variables

PSParallelCompact::mark_and_push(cm, cp->tags_addr());

PSParallelCompact::mark_and_push(cm, cp->cache_addr());

PSParallelCompact::mark_and_push(cm, cp->operands_addr());

PSParallelCompact::mark_and_push(cm, cp->pool_holder_addr());

}

}

#endif // SERIALGC

int constantPoolKlass::oop_adjust_pointers(oop obj) {

assert (obj->is_constantPool(), "obj must be constant pool");

constantPoolOop cp = (constantPoolOop) obj;

// Get size before changing pointers.

// Don't call size() or oop_size() since that is a virtual call.

int size = cp->object_size();

// Performance tweak: We skip iterating over the klass pointer since we

// know that Universe::constantPoolKlassObj never moves.

// If the tags array is null we are in the middle of allocating this constant

// pool.

if (cp->tags() != NULL) {

oop* base = (oop*)cp->base();

for (int i = 0; i< cp->length(); i++) {

if (cp->is_pointer_entry(i)) {

MarkSweep::adjust_pointer(base);

}

base++;

}

}

MarkSweep::adjust_pointer(cp->tags_addr());

MarkSweep::adjust_pointer(cp->cache_addr());

MarkSweep::adjust_pointer(cp->operands_addr());

MarkSweep::adjust_pointer(cp->pool_holder_addr());

return size;

}

int constantPoolKlass::oop_oop_iterate(oop obj, OopClosure* blk) {

assert (obj->is_constantPool(), "obj must be constant pool");

// Performance tweak: We skip iterating over the klass pointer since we

// know that Universe::constantPoolKlassObj never moves.

constantPoolOop cp = (constantPoolOop) obj;

// Get size before changing pointers.

// Don't call size() or oop_size() since that is a virtual call.

int size = cp->object_size();

// If the tags array is null we are in the middle of allocating this constant

// pool.

if (cp->tags() != NULL) {

oop* base = (oop*)cp->base();

for (int i = 0; i < cp->length(); i++) {

if (cp->is_pointer_entry(i)) {

blk->do_oop(base);

}

base++;

}

}

blk->do_oop(cp->tags_addr());

blk->do_oop(cp->cache_addr());

blk->do_oop(cp->operands_addr());

blk->do_oop(cp->pool_holder_addr());

return size;

}

int constantPoolKlass::oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr) {

assert (obj->is_constantPool(), "obj must be constant pool");

// Performance tweak: We skip iterating over the klass pointer since we

// know that Universe::constantPoolKlassObj never moves.

constantPoolOop cp = (constantPoolOop) obj;

// Get size before changing pointers.

// Don't call size() or oop_size() since that is a virtual call.

int size = cp->object_size();

// If the tags array is null we are in the middle of allocating this constant

// pool.

if (cp->tags() != NULL) {

oop* base = (oop*)cp->base();

for (int i = 0; i < cp->length(); i++) {

if (mr.contains(base)) {

if (cp->is_pointer_entry(i)) {

blk->do_oop(base);

}

}

base++;

}

}

oop* addr;

addr = cp->tags_addr();

if (mr.contains(addr)) blk->do_oop(addr);

addr = cp->cache_addr();

if (mr.contains(addr)) blk->do_oop(addr);

addr = cp->operands_addr();

if (mr.contains(addr)) blk->do_oop(addr);

addr = cp->pool_holder_addr();

if (mr.contains(addr)) blk->do_oop(addr);

return size;

}

bool constantPoolKlass::oop_is_conc_safe(oop obj) const {

assert(obj->is_constantPool(), "must be constantPool");

return constantPoolOop(obj)->is_conc_safe();

}

#ifndef SERIALGC

int constantPoolKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) {

assert (obj->is_constantPool(), "obj must be constant pool");

constantPoolOop cp = (constantPoolOop) obj;

// If the tags array is null we are in the middle of allocating this constant

// pool.

if (cp->tags() != NULL) {

oop* base = (oop*)cp->base();

for (int i = 0; i < cp->length(); ++i, ++base) {

if (cp->is_pointer_entry(i)) {

PSParallelCompact::adjust_pointer(base);

}

}

}

PSParallelCompact::adjust_pointer(cp->tags_addr());

PSParallelCompact::adjust_pointer(cp->cache_addr());

PSParallelCompact::adjust_pointer(cp->operands_addr());

PSParallelCompact::adjust_pointer(cp->pool_holder_addr());

return cp->object_size();

}

void constantPoolKlass::oop_push_contents(PSPromotionManager* pm, oop obj) {

assert(obj->is_constantPool(), "should be constant pool");

constantPoolOop cp = (constantPoolOop) obj;

if (cp->tags() != NULL) {

for (int i = 1; i < cp->length(); ++i) {

if (cp->is_pointer_entry(i)) {

oop* base = cp->obj_at_addr_raw(i);

if (PSScavenge::should_scavenge(base)) {

pm->claim_or_forward_depth(base);

}

}

}

}

}

#endif // SERIALGC

void constantPoolKlass::oop_print_on(oop obj, outputStream* st) {

EXCEPTION_MARK;

oop anObj;

assert(obj->is_constantPool(), "must be constantPool");

Klass::oop_print_on(obj, st);

constantPoolOop cp = constantPoolOop(obj);

if (cp->flags() != 0) {

st->print(" - flags: 0x%x", cp->flags());

if (cp->has_pseudo_string()) st->print(" has_pseudo_string");

if (cp->has_invokedynamic()) st->print(" has_invokedynamic");

if (cp->has_preresolution()) st->print(" has_preresolution");

st->cr();

}

if (cp->pool_holder() != NULL) {

bool extra = (instanceKlass::cast(cp->pool_holder())->constants() != cp);

st->print_cr(" - holder: " INTPTR_FORMAT "%s", cp->pool_holder(), (extra? " (extra)" : ""));

}

st->print_cr(" - cache: " INTPTR_FORMAT, cp->cache());

for (int index = 1; index < cp->length(); index++) { // Index 0 is unused

st->print(" - %3d : ", index);

cp->tag_at(index).print_on(st);

st->print(" : ");

switch (cp->tag_at(index).value()) {

case JVM_CONSTANT_Class :

{ anObj = cp->klass_at(index, CATCH);

anObj->print_value_on(st);

st->print(" {0x%lx}", (address)anObj);

}

break;

case JVM_CONSTANT_Fieldref :

case JVM_CONSTANT_Methodref :

case JVM_CONSTANT_InterfaceMethodref :

st->print("klass_index=%d", cp->uncached_klass_ref_index_at(index));

st->print(" name_and_type_index=%d", cp->uncached_name_and_type_ref_index_at(index));

break;

case JVM_CONSTANT_UnresolvedString :

case JVM_CONSTANT_String :

if (cp->is_pseudo_string_at(index)) {

anObj = cp->pseudo_string_at(index);

} else {

anObj = cp->string_at(index, CATCH);

}

anObj->print_value_on(st);

st->print(" {0x%lx}", (address)anObj);

break;

case JVM_CONSTANT_Object :

anObj = cp->object_at(index);

anObj->print_value_on(st);

st->print(" {0x%lx}", (address)anObj);

break;

case JVM_CONSTANT_Integer :

st->print("%d", cp->int_at(index));

break;

case JVM_CONSTANT_Float :

st->print("%f", cp->float_at(index));

break;

case JVM_CONSTANT_Long :

st->print_jlong(cp->long_at(index));

index++; // Skip entry following eigth-byte constant

break;

case JVM_CONSTANT_Double :

st->print("%lf", cp->double_at(index));

index++; // Skip entry following eigth-byte constant

break;

case JVM_CONSTANT_NameAndType :

st->print("name_index=%d", cp->name_ref_index_at(index));

st->print(" signature_index=%d", cp->signature_ref_index_at(index));

break;

case JVM_CONSTANT_Utf8 :

cp->symbol_at(index)->print_value_on(st);

break;

case JVM_CONSTANT_UnresolvedClass : // fall-through

case JVM_CONSTANT_UnresolvedClassInError: {

// unresolved_klass_at requires lock or safe world.

CPSlot entry = cp->slot_at(index);

if (entry.is_oop()) {

entry.get_oop()->print_value_on(st);

} else {

entry.get_symbol()->print_value_on(st);

}

}

break;

case JVM_CONSTANT_MethodHandle :

st->print("ref_kind=%d", cp->method_handle_ref_kind_at(index));

st->print(" ref_index=%d", cp->method_handle_index_at(index));

break;

case JVM_CONSTANT_MethodType :

st->print("signature_index=%d", cp->method_type_index_at(index));

break;

case JVM_CONSTANT_InvokeDynamic :

{

st->print("bootstrap_method_index=%d", cp->invoke_dynamic_bootstrap_method_ref_index_at(index));

st->print(" name_and_type_index=%d", cp->invoke_dynamic_name_and_type_ref_index_at(index));

int argc = cp->invoke_dynamic_argument_count_at(index);

if (argc > 0) {

for (int arg_i = 0; arg_i < argc; arg_i++) {

int arg = cp->invoke_dynamic_argument_index_at(index, arg_i);

st->print((arg_i == 0 ? " arguments={%d" : ", %d"), arg);

}

st->print("}");

}

}

break;

default:

ShouldNotReachHere();

break;

}

st->cr();

}

st->cr();

}

void constantPoolKlass::oop_print_value_on(oop obj, outputStream* st) {

assert(obj->is_constantPool(), "must be constantPool");

constantPoolOop cp = constantPoolOop(obj);

st->print("constant pool [%d]", cp->length());

if (cp->has_pseudo_string()) st->print("/pseudo_string");

if (cp->has_invokedynamic()) st->print("/invokedynamic");

if (cp->has_preresolution()) st->print("/preresolution");

if (cp->operands() != NULL) st->print("/operands[%d]", cp->operands()->length());

cp->print_address_on(st);

st->print(" for ");

cp->pool_holder()->print_value_on(st);

if (cp->pool_holder() != NULL) {

bool extra = (instanceKlass::cast(cp->pool_holder())->constants() != cp);

if (extra) st->print(" (extra)");

}

if (cp->cache() != NULL) {

st->print(" cache=" PTR_FORMAT, cp->cache());

}

}

const char* constantPoolKlass::internal_name() const {

return "{constant pool}";

}

void constantPoolKlass::oop_verify_on(oop obj, outputStream* st) {

Klass::oop_verify_on(obj, st);

guarantee(obj->is_constantPool(), "object must be constant pool");

constantPoolOop cp = constantPoolOop(obj);

guarantee(cp->is_perm(), "should be in permspace");

if (!cp->partially_loaded()) {

for (int i = 0; i< cp->length(); i++) {

constantTag tag = cp->tag_at(i);

CPSlot entry = cp->slot_at(i);

if (tag.is_klass()) {

if (entry.is_oop()) {

guarantee(entry.get_oop()->is_perm(), "should be in permspace");

guarantee(entry.get_oop()->is_klass(), "should be klass");

}

} else if (tag.is_unresolved_klass()) {

if (entry.is_oop()) {

guarantee(entry.get_oop()->is_perm(), "should be in permspace");

guarantee(entry.get_oop()->is_klass(), "should be klass");

}

} else if (tag.is_symbol()) {

guarantee(entry.get_symbol()->refcount() != 0, "should have nonzero reference count");

} else if (tag.is_unresolved_string()) {

if (entry.is_oop()) {

guarantee(entry.get_oop()->is_perm(), "should be in permspace");

guarantee(entry.get_oop()->is_instance(), "should be instance");

}

else {

guarantee(entry.get_symbol()->refcount() != 0, "should have nonzero reference count");

}

} else if (tag.is_string()) {

if (!cp->has_pseudo_string()) {

if (entry.is_oop()) {

guarantee(!JavaObjectsInPerm || entry.get_oop()->is_perm(),

"should be in permspace");

guarantee(entry.get_oop()->is_instance(), "should be instance");

}

} else {

// can be non-perm, can be non-instance (array)

}

} else if (tag.is_object()) {

assert(entry.get_oop()->is_oop(), "should be some valid oop");

} else {

assert(!cp->is_pointer_entry(i), "unhandled oop type in constantPoolKlass::verify_on");

}

}

guarantee(cp->tags()->is_perm(), "should be in permspace");

guarantee(cp->tags()->is_typeArray(), "should be type array");

if (cp->cache() != NULL) {

// Note: cache() can be NULL before a class is completely setup or

// in temporary constant pools used during constant pool merging

guarantee(cp->cache()->is_perm(), "should be in permspace");

guarantee(cp->cache()->is_constantPoolCache(), "should be constant pool cache");

}

if (cp->operands() != NULL) {

guarantee(cp->operands()->is_perm(), "should be in permspace");

guarantee(cp->operands()->is_typeArray(), "should be type array");

}

if (cp->pool_holder() != NULL) {

// Note: pool_holder() can be NULL in temporary constant pools

// used during constant pool merging

guarantee(cp->pool_holder()->is_perm(), "should be in permspace");

guarantee(cp->pool_holder()->is_klass(), "should be klass");

}

}

}

bool constantPoolKlass::oop_partially_loaded(oop obj) const {

assert(obj->is_constantPool(), "object must be constant pool");

constantPoolOop cp = constantPoolOop(obj);

return cp->tags() == NULL || cp->pool_holder() == (klassOop) cp; // Check whether pool holder points to self

}

void constantPoolKlass::oop_set_partially_loaded(oop obj) {

assert(obj->is_constantPool(), "object must be constant pool");

constantPoolOop cp = constantPoolOop(obj);

assert(cp->pool_holder() == NULL, "just checking");

cp->set_pool_holder((klassOop) cp); // Temporarily set pool holder to point to self

}

#ifndef PRODUCT

void constantPoolKlass::preload_and_initialize_all_classes(oop obj, TRAPS) {

guarantee(obj->is_constantPool(), "object must be constant pool");

constantPoolHandle cp(THREAD, (constantPoolOop)obj);

guarantee(!cp->partially_loaded(), "must be fully loaded");

for (int i = 0; i< cp->length(); i++) {

if (cp->tag_at(i).is_unresolved_klass()) {

// This will force loading of the class

klassOop klass = cp->klass_at(i, CHECK);

if (klass->klass_part()->oop_is_instance()) {

// Force initialization of class

instanceKlass::cast(klass)->initialize(CHECK);

}

}

}

}

#endif