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 "code/debugInfo.hpp"
27 #include "oops/compressedOops.inline.hpp"
28 #include "oops/oop.hpp"
29 #include "runtime/frame.inline.hpp"
30 #include "runtime/handles.inline.hpp"
31 #include "oops/typeArrayOop.inline.hpp"
32 #include "runtime/interfaceSupport.inline.hpp"
33 #include "runtime/stackValue.hpp"
34 #if INCLUDE_ZGC
35 #include "gc/z/zBarrier.inline.hpp"
36 #endif
37
38 static BasicType klass2bt(InstanceKlass* ik, bool& is_mask) {
39 switch(vmSymbols::find_sid(ik->name())) {
40 // Vectors
41 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Byte64Vector):
42 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Byte128Vector):
43 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Byte256Vector):
44 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Byte512Vector):
45 is_mask = false;
46 return T_BYTE;
47
48 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Short64Vector):
49 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Short128Vector):
50 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Short256Vector):
51 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Short512Vector):
52 is_mask = false;
53 return T_SHORT;
54
55 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Int64Vector):
56 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Int128Vector):
57 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Int256Vector):
58 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Int512Vector):
59 is_mask = false;
60 return T_INT;
61
62 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Long64Vector):
63 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Long128Vector):
64 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Long256Vector):
65 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Long512Vector):
66 is_mask = false;
67 return T_LONG;
68
69 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Float64Vector):
70 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Float128Vector):
71 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Float256Vector):
72 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Float512Vector):
73 is_mask = false;
74 return T_FLOAT;
75
76 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Double64Vector):
77 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Double128Vector):
78 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Double256Vector):
79 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Double512Vector):
80 is_mask = false;
81 return T_DOUBLE;
82
83 // Masks
84 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Byte64Vector_Byte64Mask):
85 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Byte128Vector_Byte128Mask):
86 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Byte256Vector_Byte256Mask):
87 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Byte512Vector_Byte512Mask):
88 is_mask = true;
89 return T_BYTE;
90
91 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Short64Vector_Short64Mask):
92 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Short128Vector_Short128Mask):
93 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Short256Vector_Short256Mask):
94 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Short512Vector_Short512Mask):
95 is_mask = true;
96 return T_SHORT;
97
98 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Int64Vector_Int64Mask):
99 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Int128Vector_Int128Mask):
100 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Int256Vector_Int256Mask):
101 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Int512Vector_Int512Mask):
102 is_mask = true;
103 return T_INT;
104
105 // LongMask
106 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Long64Vector_Long64Mask):
107 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Long128Vector_Long128Mask):
108 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Long256Vector_Long256Mask):
109 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Long512Vector_Long512Mask):
110 is_mask = true;
111 return T_LONG;
112
113 // FloatMask
114 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Float64Vector_Float64Mask):
115 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Float128Vector_Float128Mask):
116 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Float256Vector_Float256Mask):
117 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Float512Vector_Float512Mask):
118 is_mask = true;
119 return T_INT;
120
121 // DoubleMask
122 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Double64Vector_Double64Mask):
123 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Double128Vector_Double128Mask):
124 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Double256Vector_Double256Mask):
125 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Double512Vector_Double512Mask):
126 is_mask = true;
127 return T_LONG;
128
129 default:
130 fatal("unknown klass: %s", ik->name()->as_utf8());
131 return T_ILLEGAL;
132 }
133 }
134
135 static int klass2bytes(InstanceKlass* ik) {
136 switch(vmSymbols::find_sid(ik->name())) {
137 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Byte64Vector):
138 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Byte64Vector_Byte64Mask):
139 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Short64Vector):
140 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Short64Vector_Short64Mask):
141 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Int64Vector):
142 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Int64Vector_Int64Mask):
143 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Long64Vector):
144 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Long64Vector_Long64Mask):
145 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Float64Vector):
146 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Float64Vector_Float64Mask):
147 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Double64Vector):
148 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Double64Vector_Double64Mask):
149 return (64 / 8);
150
151 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Byte128Vector):
152 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Byte128Vector_Byte128Mask):
153 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Short128Vector):
154 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Short128Vector_Short128Mask):
155 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Int128Vector):
156 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Int128Vector_Int128Mask):
157 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Long128Vector):
158 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Long128Vector_Long128Mask):
159 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Float128Vector):
160 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Float128Vector_Float128Mask):
161 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Double128Vector):
162 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Double128Vector_Double128Mask):
163 return (128 / 8);
164
165 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Byte256Vector):
166 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Byte256Vector_Byte256Mask):
167 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Short256Vector):
168 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Short256Vector_Short256Mask):
169 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Int256Vector):
170 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Int256Vector_Int256Mask):
171 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Long256Vector):
172 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Long256Vector_Long256Mask):
173 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Float256Vector):
174 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Float256Vector_Float256Mask):
175 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Double256Vector):
176 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Double256Vector_Double256Mask):
177 return (256 / 8);
178
179 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Byte512Vector):
180 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Byte512Vector_Byte512Mask):
181 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Short512Vector):
182 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Short512Vector_Short512Mask):
183 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Int512Vector):
184 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Int512Vector_Int512Mask):
185 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Long512Vector):
186 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Long512Vector_Long512Mask):
187 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Float512Vector):
188 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Float512Vector_Float512Mask):
189 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Double512Vector):
190 case vmSymbols::VM_SYMBOL_ENUM_NAME(jdk_incubator_vector_Double512Vector_Double512Mask):
191 return (512 / 8);
192
193 default:
194 fatal("unknown klass: %s", ik->name()->as_utf8());
195 return -1;
196 }
197 }
198
199 static void init_vector_array(typeArrayOop arr, BasicType elem_bt, int num_elem, address value_addr) {
200 int elem_size = type2aelembytes(elem_bt);
201
202 for (int i = 0; i < num_elem; i++) {
203 switch (elem_bt) {
204 case T_BYTE: {
205 jbyte elem_value = *(jbyte*) (value_addr + i * elem_size);
206 arr->byte_at_put(i, elem_value);
207 break;
208 }
209 case T_SHORT: {
210 jshort elem_value = *(jshort*) (value_addr + i * elem_size);
211 arr->short_at_put(i, elem_value);
212 break;
213 }
214 case T_INT: {
215 jint elem_value = *(jint*) (value_addr + i * elem_size);
216 arr->int_at_put(i, elem_value);
217 break;
218 }
219 case T_LONG: {
220 jlong elem_value = *(jlong*) (value_addr + i * elem_size);
221 arr->long_at_put(i, elem_value);
222 break;
223 }
224 case T_FLOAT: {
225 jfloat elem_value = *(jfloat*) (value_addr + i * elem_size);
226 arr->float_at_put(i, elem_value);
227 break;
228 }
229 case T_DOUBLE: {
230 jdouble elem_value = *(jdouble*) (value_addr + i * elem_size);
231 arr->double_at_put(i, elem_value);
232 break;
233 }
234 default:
235 fatal("unsupported: %s", type2name(elem_bt));
236 }
237 }
238 }
239
240 static void init_mask_array(typeArrayOop arr, BasicType elem_bt, int num_elem, address value_addr) {
241 int elem_size = type2aelembytes(elem_bt);
242
243 for (int i = 0; i < num_elem; i++) {
244 switch (elem_bt) {
245 case T_BYTE: {
246 jbyte elem_value = *(jbyte*) (value_addr + i * elem_size);
247 arr->bool_at_put(i, elem_value != 0);
248 break;
249 }
250 case T_SHORT: {
251 jshort elem_value = *(jshort*) (value_addr + i * elem_size);
252 arr->bool_at_put(i, elem_value != 0);
253 break;
254 }
255 case T_INT: {
256 jint elem_value = *(jint*) (value_addr + i * elem_size);
257 arr->bool_at_put(i, elem_value != 0);
258 break;
259 }
260 case T_LONG: {
261 jlong elem_value = *(jlong*) (value_addr + i * elem_size);
262 arr->bool_at_put(i, elem_value != 0);
263 break;
264 }
265 default:
266 fatal("unsupported: %s", type2name(elem_bt));
267 }
268 }
269 }
270
271 static oop allocate_vector(InstanceKlass* ik, address value_addr) {
272 bool is_mask = false; // overwritten by klass2bt
273 BasicType elem_bt = klass2bt(ik, is_mask);
274 int num_elem = klass2bytes(ik) / type2aelembytes(elem_bt);
275 assert(!is_mask || (elem_bt != T_FLOAT && elem_bt != T_DOUBLE), "%s", type2name(elem_bt));
276 TypeArrayKlass* ak = TypeArrayKlass::cast(Universe::typeArrayKlassObj(is_mask ? T_BOOLEAN : elem_bt));
277 JavaThread* thread = JavaThread::current();
278 JRT_BLOCK
279 typeArrayOop arr = ak->allocate(num_elem, THREAD);
280 if (is_mask) {
281 init_mask_array(arr, elem_bt, num_elem, value_addr);
282 } else {
283 init_vector_array(arr, elem_bt, num_elem, value_addr);
284 }
285 return arr;
286 JRT_END
287 }
288
289 StackValue* StackValue::create_stack_value(const frame* fr, const RegisterMap* reg_map, ScopeValue* sv, InstanceKlass* ik) {
290 if (sv->is_location()) {
291 // Stack or register value
292 Location loc = ((LocationValue *)sv)->location();
293
294 #ifdef SPARC
295 // %%%%% Callee-save floats will NOT be working on a Sparc until we
296 // handle the case of a 2 floats in a single double register.
297 assert( !(loc.is_register() && loc.type() == Location::float_in_dbl), "Sparc does not handle callee-save floats yet" );
298 #endif // SPARC
299
300 // First find address of value
301
302 address value_addr = loc.is_register()
303 // Value was in a callee-save register
304 ? reg_map->location(VMRegImpl::as_VMReg(loc.register_number()))
305 // Else value was directly saved on the stack. The frame's original stack pointer,
306 // before any extension by its callee (due to Compiler1 linkage on SPARC), must be used.
307 : ((address)fr->unextended_sp()) + loc.stack_offset();
308
309 // Then package it right depending on type
310 // Note: the transfer of the data is thru a union that contains
311 // an intptr_t. This is because an interpreter stack slot is
312 // really an intptr_t. The use of a union containing an intptr_t
313 // ensures that on a 64 bit platform we have proper alignment
314 // and that we store the value where the interpreter will expect
315 // to find it (i.e. proper endian). Similarly on a 32bit platform
316 // using the intptr_t ensures that when a value is larger than
317 // a stack slot (jlong/jdouble) that we capture the proper part
318 // of the value for the stack slot in question.
319 //
320 switch( loc.type() ) {
321 case Location::float_in_dbl: { // Holds a float in a double register?
322 // The callee has no clue whether the register holds a float,
323 // double or is unused. He always saves a double. Here we know
324 // a double was saved, but we only want a float back. Narrow the
325 // saved double to the float that the JVM wants.
326 assert( loc.is_register(), "floats always saved to stack in 1 word" );
327 union { intptr_t p; jfloat jf; } value;
328 value.p = (intptr_t) CONST64(0xDEADDEAFDEADDEAF);
329 value.jf = (jfloat) *(jdouble*) value_addr;
330 return new StackValue(value.p); // 64-bit high half is stack junk
331 }
332 case Location::int_in_long: { // Holds an int in a long register?
333 // The callee has no clue whether the register holds an int,
334 // long or is unused. He always saves a long. Here we know
335 // a long was saved, but we only want an int back. Narrow the
336 // saved long to the int that the JVM wants.
337 assert( loc.is_register(), "ints always saved to stack in 1 word" );
338 union { intptr_t p; jint ji;} value;
339 value.p = (intptr_t) CONST64(0xDEADDEAFDEADDEAF);
340 value.ji = (jint) *(jlong*) value_addr;
341 return new StackValue(value.p); // 64-bit high half is stack junk
342 }
343 #ifdef _LP64
344 case Location::dbl:
345 // Double value in an aligned adjacent pair
346 return new StackValue(*(intptr_t*)value_addr);
347 case Location::lng:
348 // Long value in an aligned adjacent pair
349 return new StackValue(*(intptr_t*)value_addr);
350 case Location::vector: {
351 assert(ik != NULL /*&& ik->is_vector_box()*/, "");
352 // Vector value in an aligned adjacent tuple (4, 8, or 16 slots).
353 Handle h(Thread::current(), allocate_vector(ik, value_addr)); // Wrap a handle around the oop
354 return new StackValue(h);
355 }
356 case Location::narrowoop: {
357 union { intptr_t p; narrowOop noop;} value;
358 value.p = (intptr_t) CONST64(0xDEADDEAFDEADDEAF);
359 if (loc.is_register()) {
360 // The callee has no clue whether the register holds an int,
361 // long or is unused. He always saves a long. Here we know
362 // a long was saved, but we only want an int back. Narrow the
363 // saved long to the int that the JVM wants.
364 value.noop = (narrowOop) *(julong*) value_addr;
365 } else {
366 value.noop = *(narrowOop*) value_addr;
367 }
368 // Decode narrowoop and wrap a handle around the oop
369 Handle h(Thread::current(), CompressedOops::decode(value.noop));
370 return new StackValue(h);
371 }
372 #endif
373 case Location::oop: {
374 oop val = *(oop *)value_addr;
375 #ifdef _LP64
376 if (Universe::is_narrow_oop_base(val)) {
377 // Compiled code may produce decoded oop = narrow_oop_base
378 // when a narrow oop implicit null check is used.
379 // The narrow_oop_base could be NULL or be the address
380 // of the page below heap. Use NULL value for both cases.
381 val = (oop)NULL;
382 }
383 #endif
384 #if INCLUDE_ZGC
385 // Deoptimization must make sure all oop have passed load barrier
386 if (UseZGC) {
387 val = ZBarrier::load_barrier_on_oop_field_preloaded((oop*)value_addr, val);
388 }
389 #endif
390
391 Handle h(Thread::current(), val); // Wrap a handle around the oop
392 return new StackValue(h);
393 }
394 case Location::addr: {
395 ShouldNotReachHere(); // both C1 and C2 now inline jsrs
396 }
397 case Location::normal: {
398 // Just copy all other bits straight through
399 union { intptr_t p; jint ji;} value;
400 value.p = (intptr_t) CONST64(0xDEADDEAFDEADDEAF);
401 value.ji = *(jint*)value_addr;
402 return new StackValue(value.p);
403 }
404 case Location::invalid:
405 return new StackValue();
406 default:
407 ShouldNotReachHere();
408 }
409
410 } else if (sv->is_constant_int()) {
411 // Constant int: treat same as register int.
412 union { intptr_t p; jint ji;} value;
413 value.p = (intptr_t) CONST64(0xDEADDEAFDEADDEAF);
414 value.ji = (jint)((ConstantIntValue*)sv)->value();
415 return new StackValue(value.p);
416 } else if (sv->is_constant_oop()) {
417 // constant oop
418 return new StackValue(sv->as_ConstantOopReadValue()->value());
419 #ifdef _LP64
420 } else if (sv->is_constant_double()) {
421 // Constant double in a single stack slot
422 union { intptr_t p; double d; } value;
423 value.p = (intptr_t) CONST64(0xDEADDEAFDEADDEAF);
424 value.d = ((ConstantDoubleValue *)sv)->value();
425 return new StackValue(value.p);
426 } else if (sv->is_constant_long()) {
427 // Constant long in a single stack slot
428 union { intptr_t p; jlong jl; } value;
429 value.p = (intptr_t) CONST64(0xDEADDEAFDEADDEAF);
430 value.jl = ((ConstantLongValue *)sv)->value();
431 return new StackValue(value.p);
432 #endif
433 } else if (sv->is_object()) { // Scalar replaced object in compiled frame
434 Handle ov = ((ObjectValue *)sv)->value();
435 return new StackValue(ov, (ov.is_null()) ? 1 : 0);
436 }
437
438 // Unknown ScopeValue type
439 ShouldNotReachHere();
440 return new StackValue((intptr_t) 0); // dummy
441 }
442
443
444 BasicLock* StackValue::resolve_monitor_lock(const frame* fr, Location location) {
445 assert(location.is_stack(), "for now we only look at the stack");
446 int word_offset = location.stack_offset() / wordSize;
447 // (stack picture)
448 // high: [ ] word_offset + 1
449 // low [ ] word_offset
450 //
451 // sp-> [ ] 0
452 // the word_offset is the distance from the stack pointer to the lowest address
453 // The frame's original stack pointer, before any extension by its callee
454 // (due to Compiler1 linkage on SPARC), must be used.
455 return (BasicLock*) (fr->unextended_sp() + word_offset);
456 }
457
458
459 #ifndef PRODUCT
460
461 void StackValue::print_on(outputStream* st) const {
462 switch(_type) {
463 case T_INT:
464 st->print("%d (int) %f (float) %x (hex)", *(int *)&_integer_value, *(float *)&_integer_value, *(int *)&_integer_value);
465 break;
466
467 case T_OBJECT:
468 _handle_value()->print_value_on(st);
469 st->print(" <" INTPTR_FORMAT ">", p2i((address)_handle_value()));
470 break;
471
472 case T_ILLEGAL: // FIXME
473 st->print(" V@<" INTPTR_FORMAT ">", _integer_value);
474 break;
475
476 case T_CONFLICT:
477 st->print("conflict");
478 break;
479
480 default:
481 ShouldNotReachHere();
482 }
483 }
484
485 #endif