1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/ci/ciInstanceKlass.cpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,705 @@
1.4 +/*
1.5 + * Copyright (c) 1999, 2014, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#include "precompiled.hpp"
1.29 +#include "ci/ciField.hpp"
1.30 +#include "ci/ciInstance.hpp"
1.31 +#include "ci/ciInstanceKlass.hpp"
1.32 +#include "ci/ciUtilities.hpp"
1.33 +#include "classfile/systemDictionary.hpp"
1.34 +#include "memory/allocation.hpp"
1.35 +#include "memory/allocation.inline.hpp"
1.36 +#include "oops/oop.inline.hpp"
1.37 +#include "oops/fieldStreams.hpp"
1.38 +#include "runtime/fieldDescriptor.hpp"
1.39 +
1.40 +// ciInstanceKlass
1.41 +//
1.42 +// This class represents a Klass* in the HotSpot virtual machine
1.43 +// whose Klass part in an InstanceKlass.
1.44 +
1.45 +// ------------------------------------------------------------------
1.46 +// ciInstanceKlass::ciInstanceKlass
1.47 +//
1.48 +// Loaded instance klass.
1.49 +ciInstanceKlass::ciInstanceKlass(KlassHandle h_k) :
1.50 + ciKlass(h_k), _non_static_fields(NULL)
1.51 +{
1.52 + assert(get_Klass()->oop_is_instance(), "wrong type");
1.53 + assert(get_instanceKlass()->is_loaded(), "must be at least loaded");
1.54 + InstanceKlass* ik = get_instanceKlass();
1.55 +
1.56 + AccessFlags access_flags = ik->access_flags();
1.57 + _flags = ciFlags(access_flags);
1.58 + _has_finalizer = access_flags.has_finalizer();
1.59 + _has_subklass = ik->subklass() != NULL;
1.60 + _init_state = ik->init_state();
1.61 + _nonstatic_field_size = ik->nonstatic_field_size();
1.62 + _has_nonstatic_fields = ik->has_nonstatic_fields();
1.63 + _has_default_methods = ik->has_default_methods();
1.64 + _nonstatic_fields = NULL; // initialized lazily by compute_nonstatic_fields:
1.65 +
1.66 + _implementor = NULL; // we will fill these lazily
1.67 +
1.68 + Thread *thread = Thread::current();
1.69 + if (ciObjectFactory::is_initialized()) {
1.70 + _loader = JNIHandles::make_local(thread, ik->class_loader());
1.71 + _protection_domain = JNIHandles::make_local(thread,
1.72 + ik->protection_domain());
1.73 + _is_shared = false;
1.74 + } else {
1.75 + Handle h_loader(thread, ik->class_loader());
1.76 + Handle h_protection_domain(thread, ik->protection_domain());
1.77 + _loader = JNIHandles::make_global(h_loader);
1.78 + _protection_domain = JNIHandles::make_global(h_protection_domain);
1.79 + _is_shared = true;
1.80 + }
1.81 +
1.82 + // Lazy fields get filled in only upon request.
1.83 + _super = NULL;
1.84 + _java_mirror = NULL;
1.85 +
1.86 + if (is_shared()) {
1.87 + if (h_k() != SystemDictionary::Object_klass()) {
1.88 + super();
1.89 + }
1.90 + //compute_nonstatic_fields(); // done outside of constructor
1.91 + }
1.92 +
1.93 + _field_cache = NULL;
1.94 +}
1.95 +
1.96 +// Version for unloaded classes:
1.97 +ciInstanceKlass::ciInstanceKlass(ciSymbol* name,
1.98 + jobject loader, jobject protection_domain)
1.99 + : ciKlass(name, T_OBJECT)
1.100 +{
1.101 + assert(name->byte_at(0) != '[', "not an instance klass");
1.102 + _init_state = (InstanceKlass::ClassState)0;
1.103 + _nonstatic_field_size = -1;
1.104 + _has_nonstatic_fields = false;
1.105 + _nonstatic_fields = NULL;
1.106 + _loader = loader;
1.107 + _protection_domain = protection_domain;
1.108 + _is_shared = false;
1.109 + _super = NULL;
1.110 + _java_mirror = NULL;
1.111 + _field_cache = NULL;
1.112 +}
1.113 +
1.114 +
1.115 +
1.116 +// ------------------------------------------------------------------
1.117 +// ciInstanceKlass::compute_shared_is_initialized
1.118 +void ciInstanceKlass::compute_shared_init_state() {
1.119 + GUARDED_VM_ENTRY(
1.120 + InstanceKlass* ik = get_instanceKlass();
1.121 + _init_state = ik->init_state();
1.122 + )
1.123 +}
1.124 +
1.125 +// ------------------------------------------------------------------
1.126 +// ciInstanceKlass::compute_shared_has_subklass
1.127 +bool ciInstanceKlass::compute_shared_has_subklass() {
1.128 + GUARDED_VM_ENTRY(
1.129 + InstanceKlass* ik = get_instanceKlass();
1.130 + _has_subklass = ik->subklass() != NULL;
1.131 + return _has_subklass;
1.132 + )
1.133 +}
1.134 +
1.135 +// ------------------------------------------------------------------
1.136 +// ciInstanceKlass::loader
1.137 +oop ciInstanceKlass::loader() {
1.138 + ASSERT_IN_VM;
1.139 + return JNIHandles::resolve(_loader);
1.140 +}
1.141 +
1.142 +// ------------------------------------------------------------------
1.143 +// ciInstanceKlass::loader_handle
1.144 +jobject ciInstanceKlass::loader_handle() {
1.145 + return _loader;
1.146 +}
1.147 +
1.148 +// ------------------------------------------------------------------
1.149 +// ciInstanceKlass::protection_domain
1.150 +oop ciInstanceKlass::protection_domain() {
1.151 + ASSERT_IN_VM;
1.152 + return JNIHandles::resolve(_protection_domain);
1.153 +}
1.154 +
1.155 +// ------------------------------------------------------------------
1.156 +// ciInstanceKlass::protection_domain_handle
1.157 +jobject ciInstanceKlass::protection_domain_handle() {
1.158 + return _protection_domain;
1.159 +}
1.160 +
1.161 +// ------------------------------------------------------------------
1.162 +// ciInstanceKlass::field_cache
1.163 +//
1.164 +// Get the field cache associated with this klass.
1.165 +ciConstantPoolCache* ciInstanceKlass::field_cache() {
1.166 + if (is_shared()) {
1.167 + return NULL;
1.168 + }
1.169 + if (_field_cache == NULL) {
1.170 + assert(!is_java_lang_Object(), "Object has no fields");
1.171 + Arena* arena = CURRENT_ENV->arena();
1.172 + _field_cache = new (arena) ciConstantPoolCache(arena, 5);
1.173 + }
1.174 + return _field_cache;
1.175 +}
1.176 +
1.177 +// ------------------------------------------------------------------
1.178 +// ciInstanceKlass::get_canonical_holder
1.179 +//
1.180 +ciInstanceKlass* ciInstanceKlass::get_canonical_holder(int offset) {
1.181 + #ifdef ASSERT
1.182 + if (!(offset >= 0 && offset < layout_helper())) {
1.183 + tty->print("*** get_canonical_holder(%d) on ", offset);
1.184 + this->print();
1.185 + tty->print_cr(" ***");
1.186 + };
1.187 + assert(offset >= 0 && offset < layout_helper(), "offset must be tame");
1.188 + #endif
1.189 +
1.190 + if (offset < instanceOopDesc::base_offset_in_bytes()) {
1.191 + // All header offsets belong properly to java/lang/Object.
1.192 + return CURRENT_ENV->Object_klass();
1.193 + }
1.194 +
1.195 + ciInstanceKlass* self = this;
1.196 + for (;;) {
1.197 + assert(self->is_loaded(), "must be loaded to have size");
1.198 + ciInstanceKlass* super = self->super();
1.199 + if (super == NULL || super->nof_nonstatic_fields() == 0 ||
1.200 + !super->contains_field_offset(offset)) {
1.201 + return self;
1.202 + } else {
1.203 + self = super; // return super->get_canonical_holder(offset)
1.204 + }
1.205 + }
1.206 +}
1.207 +
1.208 +// ------------------------------------------------------------------
1.209 +// ciInstanceKlass::is_java_lang_Object
1.210 +//
1.211 +// Is this klass java.lang.Object?
1.212 +bool ciInstanceKlass::is_java_lang_Object() const {
1.213 + return equals(CURRENT_ENV->Object_klass());
1.214 +}
1.215 +
1.216 +// ------------------------------------------------------------------
1.217 +// ciInstanceKlass::uses_default_loader
1.218 +bool ciInstanceKlass::uses_default_loader() const {
1.219 + // Note: We do not need to resolve the handle or enter the VM
1.220 + // in order to test null-ness.
1.221 + return _loader == NULL;
1.222 +}
1.223 +
1.224 +// ------------------------------------------------------------------
1.225 +
1.226 +/**
1.227 + * Return basic type of boxed value for box klass or T_OBJECT if not.
1.228 + */
1.229 +BasicType ciInstanceKlass::box_klass_type() const {
1.230 + if (uses_default_loader() && is_loaded()) {
1.231 + return SystemDictionary::box_klass_type(get_Klass());
1.232 + } else {
1.233 + return T_OBJECT;
1.234 + }
1.235 +}
1.236 +
1.237 +/**
1.238 + * Is this boxing klass?
1.239 + */
1.240 +bool ciInstanceKlass::is_box_klass() const {
1.241 + return is_java_primitive(box_klass_type());
1.242 +}
1.243 +
1.244 +/**
1.245 + * Is this boxed value offset?
1.246 + */
1.247 +bool ciInstanceKlass::is_boxed_value_offset(int offset) const {
1.248 + BasicType bt = box_klass_type();
1.249 + return is_java_primitive(bt) &&
1.250 + (offset == java_lang_boxing_object::value_offset_in_bytes(bt));
1.251 +}
1.252 +
1.253 +// ------------------------------------------------------------------
1.254 +// ciInstanceKlass::is_in_package
1.255 +//
1.256 +// Is this klass in the given package?
1.257 +bool ciInstanceKlass::is_in_package(const char* packagename, int len) {
1.258 + // To avoid class loader mischief, this test always rejects application classes.
1.259 + if (!uses_default_loader())
1.260 + return false;
1.261 + GUARDED_VM_ENTRY(
1.262 + return is_in_package_impl(packagename, len);
1.263 + )
1.264 +}
1.265 +
1.266 +bool ciInstanceKlass::is_in_package_impl(const char* packagename, int len) {
1.267 + ASSERT_IN_VM;
1.268 +
1.269 + // If packagename contains trailing '/' exclude it from the
1.270 + // prefix-test since we test for it explicitly.
1.271 + if (packagename[len - 1] == '/')
1.272 + len--;
1.273 +
1.274 + if (!name()->starts_with(packagename, len))
1.275 + return false;
1.276 +
1.277 + // Test if the class name is something like "java/lang".
1.278 + if ((len + 1) > name()->utf8_length())
1.279 + return false;
1.280 +
1.281 + // Test for trailing '/'
1.282 + if ((char) name()->byte_at(len) != '/')
1.283 + return false;
1.284 +
1.285 + // Make sure it's not actually in a subpackage:
1.286 + if (name()->index_of_at(len+1, "/", 1) >= 0)
1.287 + return false;
1.288 +
1.289 + return true;
1.290 +}
1.291 +
1.292 +// ------------------------------------------------------------------
1.293 +// ciInstanceKlass::print_impl
1.294 +//
1.295 +// Implementation of the print method.
1.296 +void ciInstanceKlass::print_impl(outputStream* st) {
1.297 + ciKlass::print_impl(st);
1.298 + GUARDED_VM_ENTRY(st->print(" loader=" INTPTR_FORMAT, p2i((address)loader()));)
1.299 + if (is_loaded()) {
1.300 + st->print(" loaded=true initialized=%s finalized=%s subklass=%s size=%d flags=",
1.301 + bool_to_str(is_initialized()),
1.302 + bool_to_str(has_finalizer()),
1.303 + bool_to_str(has_subklass()),
1.304 + layout_helper());
1.305 +
1.306 + _flags.print_klass_flags();
1.307 +
1.308 + if (_super) {
1.309 + st->print(" super=");
1.310 + _super->print_name();
1.311 + }
1.312 + if (_java_mirror) {
1.313 + st->print(" mirror=PRESENT");
1.314 + }
1.315 + } else {
1.316 + st->print(" loaded=false");
1.317 + }
1.318 +}
1.319 +
1.320 +// ------------------------------------------------------------------
1.321 +// ciInstanceKlass::super
1.322 +//
1.323 +// Get the superklass of this klass.
1.324 +ciInstanceKlass* ciInstanceKlass::super() {
1.325 + assert(is_loaded(), "must be loaded");
1.326 + if (_super == NULL && !is_java_lang_Object()) {
1.327 + GUARDED_VM_ENTRY(
1.328 + Klass* super_klass = get_instanceKlass()->super();
1.329 + _super = CURRENT_ENV->get_instance_klass(super_klass);
1.330 + )
1.331 + }
1.332 + return _super;
1.333 +}
1.334 +
1.335 +// ------------------------------------------------------------------
1.336 +// ciInstanceKlass::java_mirror
1.337 +//
1.338 +// Get the instance of java.lang.Class corresponding to this klass.
1.339 +// Cache it on this->_java_mirror.
1.340 +ciInstance* ciInstanceKlass::java_mirror() {
1.341 + if (is_shared()) {
1.342 + return ciKlass::java_mirror();
1.343 + }
1.344 + if (_java_mirror == NULL) {
1.345 + _java_mirror = ciKlass::java_mirror();
1.346 + }
1.347 + return _java_mirror;
1.348 +}
1.349 +
1.350 +// ------------------------------------------------------------------
1.351 +// ciInstanceKlass::unique_concrete_subklass
1.352 +ciInstanceKlass* ciInstanceKlass::unique_concrete_subklass() {
1.353 + if (!is_loaded()) return NULL; // No change if class is not loaded
1.354 + if (!is_abstract()) return NULL; // Only applies to abstract classes.
1.355 + if (!has_subklass()) return NULL; // Must have at least one subklass.
1.356 + VM_ENTRY_MARK;
1.357 + InstanceKlass* ik = get_instanceKlass();
1.358 + Klass* up = ik->up_cast_abstract();
1.359 + assert(up->oop_is_instance(), "must be InstanceKlass");
1.360 + if (ik == up) {
1.361 + return NULL;
1.362 + }
1.363 + return CURRENT_THREAD_ENV->get_instance_klass(up);
1.364 +}
1.365 +
1.366 +// ------------------------------------------------------------------
1.367 +// ciInstanceKlass::has_finalizable_subclass
1.368 +bool ciInstanceKlass::has_finalizable_subclass() {
1.369 + if (!is_loaded()) return true;
1.370 + VM_ENTRY_MARK;
1.371 + return Dependencies::find_finalizable_subclass(get_instanceKlass()) != NULL;
1.372 +}
1.373 +
1.374 +// ------------------------------------------------------------------
1.375 +// ciInstanceKlass::get_field_by_offset
1.376 +ciField* ciInstanceKlass::get_field_by_offset(int field_offset, bool is_static) {
1.377 + if (!is_static) {
1.378 + for (int i = 0, len = nof_nonstatic_fields(); i < len; i++) {
1.379 + ciField* field = _nonstatic_fields->at(i);
1.380 + int field_off = field->offset_in_bytes();
1.381 + if (field_off == field_offset)
1.382 + return field;
1.383 + if (field_off > field_offset)
1.384 + break;
1.385 + // could do binary search or check bins, but probably not worth it
1.386 + }
1.387 + return NULL;
1.388 + }
1.389 + VM_ENTRY_MARK;
1.390 + InstanceKlass* k = get_instanceKlass();
1.391 + fieldDescriptor fd;
1.392 + if (!k->find_field_from_offset(field_offset, is_static, &fd)) {
1.393 + return NULL;
1.394 + }
1.395 + ciField* field = new (CURRENT_THREAD_ENV->arena()) ciField(&fd);
1.396 + return field;
1.397 +}
1.398 +
1.399 +// ------------------------------------------------------------------
1.400 +// ciInstanceKlass::get_field_by_name
1.401 +ciField* ciInstanceKlass::get_field_by_name(ciSymbol* name, ciSymbol* signature, bool is_static) {
1.402 + VM_ENTRY_MARK;
1.403 + InstanceKlass* k = get_instanceKlass();
1.404 + fieldDescriptor fd;
1.405 + Klass* def = k->find_field(name->get_symbol(), signature->get_symbol(), is_static, &fd);
1.406 + if (def == NULL) {
1.407 + return NULL;
1.408 + }
1.409 + ciField* field = new (CURRENT_THREAD_ENV->arena()) ciField(&fd);
1.410 + return field;
1.411 +}
1.412 +
1.413 +// ------------------------------------------------------------------
1.414 +// ciInstanceKlass::non_static_fields.
1.415 +
1.416 +class NonStaticFieldFiller: public FieldClosure {
1.417 + GrowableArray<ciField*>* _arr;
1.418 + ciEnv* _curEnv;
1.419 +public:
1.420 + NonStaticFieldFiller(ciEnv* curEnv, GrowableArray<ciField*>* arr) :
1.421 + _curEnv(curEnv), _arr(arr)
1.422 + {}
1.423 + void do_field(fieldDescriptor* fd) {
1.424 + ciField* field = new (_curEnv->arena()) ciField(fd);
1.425 + _arr->append(field);
1.426 + }
1.427 +};
1.428 +
1.429 +GrowableArray<ciField*>* ciInstanceKlass::non_static_fields() {
1.430 + if (_non_static_fields == NULL) {
1.431 + VM_ENTRY_MARK;
1.432 + ciEnv* curEnv = ciEnv::current();
1.433 + InstanceKlass* ik = get_instanceKlass();
1.434 + int max_n_fields = ik->java_fields_count();
1.435 +
1.436 + Arena* arena = curEnv->arena();
1.437 + _non_static_fields =
1.438 + new (arena) GrowableArray<ciField*>(arena, max_n_fields, 0, NULL);
1.439 + NonStaticFieldFiller filler(curEnv, _non_static_fields);
1.440 + ik->do_nonstatic_fields(&filler);
1.441 + }
1.442 + return _non_static_fields;
1.443 +}
1.444 +
1.445 +static int sort_field_by_offset(ciField** a, ciField** b) {
1.446 + return (*a)->offset_in_bytes() - (*b)->offset_in_bytes();
1.447 + // (no worries about 32-bit overflow...)
1.448 +}
1.449 +
1.450 +// ------------------------------------------------------------------
1.451 +// ciInstanceKlass::compute_nonstatic_fields
1.452 +int ciInstanceKlass::compute_nonstatic_fields() {
1.453 + assert(is_loaded(), "must be loaded");
1.454 +
1.455 + if (_nonstatic_fields != NULL)
1.456 + return _nonstatic_fields->length();
1.457 +
1.458 + if (!has_nonstatic_fields()) {
1.459 + Arena* arena = CURRENT_ENV->arena();
1.460 + _nonstatic_fields = new (arena) GrowableArray<ciField*>(arena, 0, 0, NULL);
1.461 + return 0;
1.462 + }
1.463 + assert(!is_java_lang_Object(), "bootstrap OK");
1.464 +
1.465 + // Size in bytes of my fields, including inherited fields.
1.466 + int fsize = nonstatic_field_size() * heapOopSize;
1.467 +
1.468 + ciInstanceKlass* super = this->super();
1.469 + GrowableArray<ciField*>* super_fields = NULL;
1.470 + if (super != NULL && super->has_nonstatic_fields()) {
1.471 + int super_fsize = super->nonstatic_field_size() * heapOopSize;
1.472 + int super_flen = super->nof_nonstatic_fields();
1.473 + super_fields = super->_nonstatic_fields;
1.474 + assert(super_flen == 0 || super_fields != NULL, "first get nof_fields");
1.475 + // See if I am no larger than my super; if so, I can use his fields.
1.476 + if (fsize == super_fsize) {
1.477 + _nonstatic_fields = super_fields;
1.478 + return super_fields->length();
1.479 + }
1.480 + }
1.481 +
1.482 + GrowableArray<ciField*>* fields = NULL;
1.483 + GUARDED_VM_ENTRY({
1.484 + fields = compute_nonstatic_fields_impl(super_fields);
1.485 + });
1.486 +
1.487 + if (fields == NULL) {
1.488 + // This can happen if this class (java.lang.Class) has invisible fields.
1.489 + _nonstatic_fields = super_fields;
1.490 + return super_fields->length();
1.491 + }
1.492 +
1.493 + int flen = fields->length();
1.494 +
1.495 + // Now sort them by offset, ascending.
1.496 + // (In principle, they could mix with superclass fields.)
1.497 + fields->sort(sort_field_by_offset);
1.498 + _nonstatic_fields = fields;
1.499 + return flen;
1.500 +}
1.501 +
1.502 +GrowableArray<ciField*>*
1.503 +ciInstanceKlass::compute_nonstatic_fields_impl(GrowableArray<ciField*>*
1.504 + super_fields) {
1.505 + ASSERT_IN_VM;
1.506 + Arena* arena = CURRENT_ENV->arena();
1.507 + int flen = 0;
1.508 + GrowableArray<ciField*>* fields = NULL;
1.509 + InstanceKlass* k = get_instanceKlass();
1.510 + for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1.511 + if (fs.access_flags().is_static()) continue;
1.512 + flen += 1;
1.513 + }
1.514 +
1.515 + // allocate the array:
1.516 + if (flen == 0) {
1.517 + return NULL; // return nothing if none are locally declared
1.518 + }
1.519 + if (super_fields != NULL) {
1.520 + flen += super_fields->length();
1.521 + }
1.522 + fields = new (arena) GrowableArray<ciField*>(arena, flen, 0, NULL);
1.523 + if (super_fields != NULL) {
1.524 + fields->appendAll(super_fields);
1.525 + }
1.526 +
1.527 + for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1.528 + if (fs.access_flags().is_static()) continue;
1.529 + fieldDescriptor& fd = fs.field_descriptor();
1.530 + ciField* field = new (arena) ciField(&fd);
1.531 + fields->append(field);
1.532 + }
1.533 + assert(fields->length() == flen, "sanity");
1.534 + return fields;
1.535 +}
1.536 +
1.537 +// ------------------------------------------------------------------
1.538 +// ciInstanceKlass::find_method
1.539 +//
1.540 +// Find a method in this klass.
1.541 +ciMethod* ciInstanceKlass::find_method(ciSymbol* name, ciSymbol* signature) {
1.542 + VM_ENTRY_MARK;
1.543 + InstanceKlass* k = get_instanceKlass();
1.544 + Symbol* name_sym = name->get_symbol();
1.545 + Symbol* sig_sym= signature->get_symbol();
1.546 +
1.547 + Method* m = k->find_method(name_sym, sig_sym);
1.548 + if (m == NULL) return NULL;
1.549 +
1.550 + return CURRENT_THREAD_ENV->get_method(m);
1.551 +}
1.552 +
1.553 +// ------------------------------------------------------------------
1.554 +// ciInstanceKlass::is_leaf_type
1.555 +bool ciInstanceKlass::is_leaf_type() {
1.556 + assert(is_loaded(), "must be loaded");
1.557 + if (is_shared()) {
1.558 + return is_final(); // approximately correct
1.559 + } else {
1.560 + return !_has_subklass && (nof_implementors() == 0);
1.561 + }
1.562 +}
1.563 +
1.564 +// ------------------------------------------------------------------
1.565 +// ciInstanceKlass::implementor
1.566 +//
1.567 +// Report an implementor of this interface.
1.568 +// Note that there are various races here, since my copy
1.569 +// of _nof_implementors might be out of date with respect
1.570 +// to results returned by InstanceKlass::implementor.
1.571 +// This is OK, since any dependencies we decide to assert
1.572 +// will be checked later under the Compile_lock.
1.573 +ciInstanceKlass* ciInstanceKlass::implementor() {
1.574 + ciInstanceKlass* impl = _implementor;
1.575 + if (impl == NULL) {
1.576 + // Go into the VM to fetch the implementor.
1.577 + {
1.578 + VM_ENTRY_MARK;
1.579 + Klass* k = get_instanceKlass()->implementor();
1.580 + if (k != NULL) {
1.581 + if (k == get_instanceKlass()) {
1.582 + // More than one implementors. Use 'this' in this case.
1.583 + impl = this;
1.584 + } else {
1.585 + impl = CURRENT_THREAD_ENV->get_instance_klass(k);
1.586 + }
1.587 + }
1.588 + }
1.589 + // Memoize this result.
1.590 + if (!is_shared()) {
1.591 + _implementor = impl;
1.592 + }
1.593 + }
1.594 + return impl;
1.595 +}
1.596 +
1.597 +// Utility class for printing of the contents of the static fields for
1.598 +// use by compilation replay. It only prints out the information that
1.599 +// could be consumed by the compiler, so for primitive types it prints
1.600 +// out the actual value. For Strings it's the actual string value.
1.601 +// For array types it it's first level array size since that's the
1.602 +// only value which statically unchangeable. For all other reference
1.603 +// types it simply prints out the dynamic type.
1.604 +
1.605 +class StaticFinalFieldPrinter : public FieldClosure {
1.606 + outputStream* _out;
1.607 + const char* _holder;
1.608 + public:
1.609 + StaticFinalFieldPrinter(outputStream* out, const char* holder) :
1.610 + _out(out),
1.611 + _holder(holder) {
1.612 + }
1.613 + void do_field(fieldDescriptor* fd) {
1.614 + if (fd->is_final() && !fd->has_initial_value()) {
1.615 + ResourceMark rm;
1.616 + oop mirror = fd->field_holder()->java_mirror();
1.617 + _out->print("staticfield %s %s %s ", _holder, fd->name()->as_quoted_ascii(), fd->signature()->as_quoted_ascii());
1.618 + switch (fd->field_type()) {
1.619 + case T_BYTE: _out->print_cr("%d", mirror->byte_field(fd->offset())); break;
1.620 + case T_BOOLEAN: _out->print_cr("%d", mirror->bool_field(fd->offset())); break;
1.621 + case T_SHORT: _out->print_cr("%d", mirror->short_field(fd->offset())); break;
1.622 + case T_CHAR: _out->print_cr("%d", mirror->char_field(fd->offset())); break;
1.623 + case T_INT: _out->print_cr("%d", mirror->int_field(fd->offset())); break;
1.624 + case T_LONG: _out->print_cr(INT64_FORMAT, (int64_t)(mirror->long_field(fd->offset()))); break;
1.625 + case T_FLOAT: {
1.626 + float f = mirror->float_field(fd->offset());
1.627 + _out->print_cr("%d", *(int*)&f);
1.628 + break;
1.629 + }
1.630 + case T_DOUBLE: {
1.631 + double d = mirror->double_field(fd->offset());
1.632 + _out->print_cr(INT64_FORMAT, *(int64_t*)&d);
1.633 + break;
1.634 + }
1.635 + case T_ARRAY: {
1.636 + oop value = mirror->obj_field_acquire(fd->offset());
1.637 + if (value == NULL) {
1.638 + _out->print_cr("null");
1.639 + } else {
1.640 + typeArrayOop ta = (typeArrayOop)value;
1.641 + _out->print("%d", ta->length());
1.642 + if (value->is_objArray()) {
1.643 + objArrayOop oa = (objArrayOop)value;
1.644 + const char* klass_name = value->klass()->name()->as_quoted_ascii();
1.645 + _out->print(" %s", klass_name);
1.646 + }
1.647 + _out->cr();
1.648 + }
1.649 + break;
1.650 + }
1.651 + case T_OBJECT: {
1.652 + oop value = mirror->obj_field_acquire(fd->offset());
1.653 + if (value == NULL) {
1.654 + _out->print_cr("null");
1.655 + } else if (value->is_instance()) {
1.656 + if (value->is_a(SystemDictionary::String_klass())) {
1.657 + _out->print("\"");
1.658 + _out->print_raw(java_lang_String::as_quoted_ascii(value));
1.659 + _out->print_cr("\"");
1.660 + } else {
1.661 + const char* klass_name = value->klass()->name()->as_quoted_ascii();
1.662 + _out->print_cr("%s", klass_name);
1.663 + }
1.664 + } else {
1.665 + ShouldNotReachHere();
1.666 + }
1.667 + break;
1.668 + }
1.669 + default:
1.670 + ShouldNotReachHere();
1.671 + }
1.672 + }
1.673 + }
1.674 +};
1.675 +
1.676 +
1.677 +void ciInstanceKlass::dump_replay_data(outputStream* out) {
1.678 + ResourceMark rm;
1.679 +
1.680 + InstanceKlass* ik = get_instanceKlass();
1.681 + ConstantPool* cp = ik->constants();
1.682 +
1.683 + // Try to record related loaded classes
1.684 + Klass* sub = ik->subklass();
1.685 + while (sub != NULL) {
1.686 + if (sub->oop_is_instance()) {
1.687 + out->print_cr("instanceKlass %s", sub->name()->as_quoted_ascii());
1.688 + }
1.689 + sub = sub->next_sibling();
1.690 + }
1.691 +
1.692 + // Dump out the state of the constant pool tags. During replay the
1.693 + // tags will be validated for things which shouldn't change and
1.694 + // classes will be resolved if the tags indicate that they were
1.695 + // resolved at compile time.
1.696 + out->print("ciInstanceKlass %s %d %d %d", ik->name()->as_quoted_ascii(),
1.697 + is_linked(), is_initialized(), cp->length());
1.698 + for (int index = 1; index < cp->length(); index++) {
1.699 + out->print(" %d", cp->tags()->at(index));
1.700 + }
1.701 + out->cr();
1.702 + if (is_initialized()) {
1.703 + // Dump out the static final fields in case the compilation relies
1.704 + // on their value for correct replay.
1.705 + StaticFinalFieldPrinter sffp(out, ik->name()->as_quoted_ascii());
1.706 + ik->do_local_static_fields(&sffp);
1.707 + }
1.708 +}
