1 /*
2 * Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/moduleEntry.hpp"
27 #include "classfile/packageEntry.hpp"
28 #include "classfile/symbolTable.hpp"
29 #include "classfile/systemDictionary.hpp"
30 #include "classfile/vmSymbols.hpp"
31 #include "gc/shared/collectedHeap.hpp"
32 #include "gc/shared/collectedHeap.inline.hpp"
33 #include "memory/metadataFactory.hpp"
34 #include "memory/resourceArea.hpp"
35 #include "memory/universe.hpp"
36 #include "memory/universe.inline.hpp"
37 #include "oops/arrayKlass.inline.hpp"
38 #include "oops/instanceKlass.hpp"
39 #include "oops/klass.inline.hpp"
40 #include "oops/objArrayKlass.hpp"
41 #include "oops/oop.inline.hpp"
42 #include "oops/typeArrayKlass.inline.hpp"
43 #include "oops/typeArrayOop.inline.hpp"
44 #include "runtime/handles.inline.hpp"
45 #include "utilities/macros.hpp"
46
47 bool TypeArrayKlass::compute_is_subtype_of(Klass* k) {
48 if (!k->is_typeArray_klass()) {
49 return ArrayKlass::compute_is_subtype_of(k);
50 }
51
52 TypeArrayKlass* tak = TypeArrayKlass::cast(k);
53 if (dimension() != tak->dimension()) return false;
54
55 return element_type() == tak->element_type();
56 }
57
58 TypeArrayKlass* TypeArrayKlass::create_klass(BasicType type,
59 const char* name_str, TRAPS) {
60 Symbol* sym = NULL;
61 if (name_str != NULL) {
62 sym = SymbolTable::new_permanent_symbol(name_str, CHECK_NULL);
63 }
64
65 ClassLoaderData* null_loader_data = ClassLoaderData::the_null_class_loader_data();
66
67 TypeArrayKlass* ak = TypeArrayKlass::allocate(null_loader_data, type, sym, CHECK_NULL);
68
69 // Add all classes to our internal class loader list here,
70 // including classes in the bootstrap (NULL) class loader.
71 // GC walks these as strong roots.
72 null_loader_data->add_class(ak);
73
74 // Call complete_create_array_klass after all instance variables have been initialized.
75 complete_create_array_klass(ak, ak->super(), ModuleEntryTable::javabase_moduleEntry(), CHECK_NULL);
76
77 return ak;
78 }
79
80 TypeArrayKlass* TypeArrayKlass::allocate(ClassLoaderData* loader_data, BasicType type, Symbol* name, TRAPS) {
81 assert(TypeArrayKlass::header_size() <= InstanceKlass::header_size(),
82 "array klasses must be same size as InstanceKlass");
83
84 int size = ArrayKlass::static_size(TypeArrayKlass::header_size());
85
86 return new (loader_data, size, THREAD) TypeArrayKlass(type, name);
87 }
88
89 TypeArrayKlass::TypeArrayKlass(BasicType type, Symbol* name) : ArrayKlass(name) {
90 set_layout_helper(array_layout_helper(type));
91 assert(is_array_klass(), "sanity");
92 assert(is_typeArray_klass(), "sanity");
93
94 set_max_length(arrayOopDesc::max_array_length(type));
95 assert(size() >= TypeArrayKlass::header_size(), "bad size");
96
97 set_class_loader_data(ClassLoaderData::the_null_class_loader_data());
98 }
99
100 typeArrayOop TypeArrayKlass::allocate_common(int length, bool do_zero, TRAPS) {
101 assert(log2_element_size() >= 0, "bad scale");
102 if (length >= 0) {
103 if (length <= max_length()) {
104 size_t size = typeArrayOopDesc::object_size(layout_helper(), length);
105 typeArrayOop t;
106 CollectedHeap* ch = Universe::heap();
107 if (do_zero) {
108 t = (typeArrayOop)CollectedHeap::array_allocate(this, (int)size, length, CHECK_NULL);
109 } else {
110 t = (typeArrayOop)CollectedHeap::array_allocate_nozero(this, (int)size, length, CHECK_NULL);
111 }
112 return t;
113 } else {
114 report_java_out_of_memory("Requested array size exceeds VM limit");
115 JvmtiExport::post_array_size_exhausted();
116 THROW_OOP_0(Universe::out_of_memory_error_array_size());
117 }
118 } else {
119 THROW_0(vmSymbols::java_lang_NegativeArraySizeException());
120 }
121 }
122
123 oop TypeArrayKlass::multi_allocate(int rank, jint* last_size, TRAPS) {
124 // For typeArrays this is only called for the last dimension
125 assert(rank == 1, "just checking");
126 int length = *last_size;
127 return allocate(length, THREAD);
128 }
129
130
131 void TypeArrayKlass::copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS) {
132 assert(s->is_typeArray(), "must be type array");
133
134 // Check destination
135 if (!d->is_typeArray() || element_type() != TypeArrayKlass::cast(d->klass())->element_type()) {
136 THROW(vmSymbols::java_lang_ArrayStoreException());
137 }
138
139 // Check is all offsets and lengths are non negative
140 if (src_pos < 0 || dst_pos < 0 || length < 0) {
141 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
142 }
143 // Check if the ranges are valid
144 if ( (((unsigned int) length + (unsigned int) src_pos) > (unsigned int) s->length())
145 || (((unsigned int) length + (unsigned int) dst_pos) > (unsigned int) d->length()) ) {
146 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
147 }
148 // Check zero copy
149 if (length == 0)
150 return;
151
152 s = arrayOop(BarrierSet::barrier_set()->read_barrier(s));
153 d = arrayOop(BarrierSet::barrier_set()->write_barrier(d));
154
155 // This is an attempt to make the copy_array fast.
156 int l2es = log2_element_size();
157 int ihs = array_header_in_bytes() / wordSize;
158 char* src = (char*) ((oop*)s + ihs) + ((size_t)src_pos << l2es);
159 char* dst = (char*) ((oop*)d + ihs) + ((size_t)dst_pos << l2es);
160 Copy::conjoint_memory_atomic(src, dst, (size_t)length << l2es);
161 }
162
163
164 // create a klass of array holding typeArrays
165 Klass* TypeArrayKlass::array_klass_impl(bool or_null, int n, TRAPS) {
166 int dim = dimension();
167 assert(dim <= n, "check order of chain");
168 if (dim == n)
169 return this;
170
171 // lock-free read needs acquire semantics
172 if (higher_dimension_acquire() == NULL) {
173 if (or_null) return NULL;
174
175 ResourceMark rm;
176 JavaThread *jt = (JavaThread *)THREAD;
177 {
178 MutexLocker mc(Compile_lock, THREAD); // for vtables
179 // Atomic create higher dimension and link into list
180 MutexLocker mu(MultiArray_lock, THREAD);
181
182 if (higher_dimension() == NULL) {
183 Klass* oak = ObjArrayKlass::allocate_objArray_klass(
184 class_loader_data(), dim + 1, this, CHECK_NULL);
185 ObjArrayKlass* h_ak = ObjArrayKlass::cast(oak);
186 h_ak->set_lower_dimension(this);
187 // use 'release' to pair with lock-free load
188 release_set_higher_dimension(h_ak);
189 assert(h_ak->is_objArray_klass(), "incorrect initialization of ObjArrayKlass");
190 }
191 }
192 } else {
193 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
194 }
195 ObjArrayKlass* h_ak = ObjArrayKlass::cast(higher_dimension());
196 if (or_null) {
197 return h_ak->array_klass_or_null(n);
198 }
199 return h_ak->array_klass(n, THREAD);
200 }
201
202 Klass* TypeArrayKlass::array_klass_impl(bool or_null, TRAPS) {
203 return array_klass_impl(or_null, dimension() + 1, THREAD);
204 }
205
206 int TypeArrayKlass::oop_size(oop obj) const {
207 assert(obj->is_typeArray(),"must be a type array");
208 typeArrayOop t = typeArrayOop(obj);
209 return t->object_size();
210 }
211
212 void TypeArrayKlass::initialize(TRAPS) {
213 // Nothing to do. Having this function is handy since objArrayKlasses can be
214 // initialized by calling initialize on their bottom_klass, see ObjArrayKlass::initialize
215 }
216
217 const char* TypeArrayKlass::external_name(BasicType type) {
218 switch (type) {
219 case T_BOOLEAN: return "[Z";
220 case T_CHAR: return "[C";
221 case T_FLOAT: return "[F";
222 case T_DOUBLE: return "[D";
223 case T_BYTE: return "[B";
224 case T_SHORT: return "[S";
225 case T_INT: return "[I";
226 case T_LONG: return "[J";
227 default: ShouldNotReachHere();
228 }
229 return NULL;
230 }
231
232
233 // Printing
234
235 void TypeArrayKlass::print_on(outputStream* st) const {
236 #ifndef PRODUCT
237 assert(is_klass(), "must be klass");
238 print_value_on(st);
239 Klass::print_on(st);
240 #endif //PRODUCT
241 }
242
243 void TypeArrayKlass::print_value_on(outputStream* st) const {
244 assert(is_klass(), "must be klass");
245 st->print("{type array ");
246 switch (element_type()) {
247 case T_BOOLEAN: st->print("bool"); break;
248 case T_CHAR: st->print("char"); break;
249 case T_FLOAT: st->print("float"); break;
250 case T_DOUBLE: st->print("double"); break;
251 case T_BYTE: st->print("byte"); break;
252 case T_SHORT: st->print("short"); break;
253 case T_INT: st->print("int"); break;
254 case T_LONG: st->print("long"); break;
255 default: ShouldNotReachHere();
256 }
257 st->print("}");
258 }
259
260 #ifndef PRODUCT
261
262 static void print_boolean_array(typeArrayOop ta, int print_len, outputStream* st) {
263 for (int index = 0; index < print_len; index++) {
264 st->print_cr(" - %3d: %s", index, (ta->bool_at(index) == 0) ? "false" : "true");
265 }
266 }
267
268
269 static void print_char_array(typeArrayOop ta, int print_len, outputStream* st) {
270 for (int index = 0; index < print_len; index++) {
271 jchar c = ta->char_at(index);
272 st->print_cr(" - %3d: %x %c", index, c, isprint(c) ? c : ' ');
273 }
274 }
275
276
277 static void print_float_array(typeArrayOop ta, int print_len, outputStream* st) {
278 for (int index = 0; index < print_len; index++) {
279 st->print_cr(" - %3d: %g", index, ta->float_at(index));
280 }
281 }
282
283
284 static void print_double_array(typeArrayOop ta, int print_len, outputStream* st) {
285 for (int index = 0; index < print_len; index++) {
286 st->print_cr(" - %3d: %g", index, ta->double_at(index));
287 }
288 }
289
290
291 static void print_byte_array(typeArrayOop ta, int print_len, outputStream* st) {
292 for (int index = 0; index < print_len; index++) {
293 jbyte c = ta->byte_at(index);
294 st->print_cr(" - %3d: %x %c", index, c, isprint(c) ? c : ' ');
295 }
296 }
297
298
299 static void print_short_array(typeArrayOop ta, int print_len, outputStream* st) {
300 for (int index = 0; index < print_len; index++) {
301 int v = ta->ushort_at(index);
302 st->print_cr(" - %3d: 0x%x\t %d", index, v, v);
303 }
304 }
305
306
307 static void print_int_array(typeArrayOop ta, int print_len, outputStream* st) {
308 for (int index = 0; index < print_len; index++) {
309 jint v = ta->int_at(index);
310 st->print_cr(" - %3d: 0x%x %d", index, v, v);
311 }
312 }
313
314
315 static void print_long_array(typeArrayOop ta, int print_len, outputStream* st) {
316 for (int index = 0; index < print_len; index++) {
317 jlong v = ta->long_at(index);
318 st->print_cr(" - %3d: 0x%x 0x%x", index, high(v), low(v));
319 }
320 }
321
322
323 void TypeArrayKlass::oop_print_on(oop obj, outputStream* st) {
324 ArrayKlass::oop_print_on(obj, st);
325 typeArrayOop ta = typeArrayOop(obj);
326 int print_len = MIN2((intx) ta->length(), MaxElementPrintSize);
327 switch (element_type()) {
328 case T_BOOLEAN: print_boolean_array(ta, print_len, st); break;
329 case T_CHAR: print_char_array(ta, print_len, st); break;
330 case T_FLOAT: print_float_array(ta, print_len, st); break;
331 case T_DOUBLE: print_double_array(ta, print_len, st); break;
332 case T_BYTE: print_byte_array(ta, print_len, st); break;
333 case T_SHORT: print_short_array(ta, print_len, st); break;
334 case T_INT: print_int_array(ta, print_len, st); break;
335 case T_LONG: print_long_array(ta, print_len, st); break;
336 default: ShouldNotReachHere();
337 }
338 int remaining = ta->length() - print_len;
339 if (remaining > 0) {
340 st->print_cr(" - <%d more elements, increase MaxElementPrintSize to print>", remaining);
341 }
342 }
343
344 #endif // PRODUCT
345
346 const char* TypeArrayKlass::internal_name() const {
347 return Klass::external_name();
348 }
349
350 // A TypeArrayKlass is an array of a primitive type, its defining module is java.base
351 ModuleEntry* TypeArrayKlass::module() const {
352 return ModuleEntryTable::javabase_moduleEntry();
353 }
354
355 PackageEntry* TypeArrayKlass::package() const {
356 return NULL;
357 }