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 "runtime/stackValue.hpp"
32 #if INCLUDE_ZGC
33 #include "gc/z/zBarrier.inline.hpp"
34 #endif
35 #if INCLUDE_SHENANDOAHGC
36 #include "gc/shenandoah/shenandoahBarrierSet.hpp"
37 #endif
38
39 StackValue* StackValue::create_stack_value(const frame* fr, const RegisterMap* reg_map, ScopeValue* sv) {
40 if (sv->is_location()) {
41 // Stack or register value
42 Location loc = ((LocationValue *)sv)->location();
43
44 #ifdef SPARC
45 // %%%%% Callee-save floats will NOT be working on a Sparc until we
46 // handle the case of a 2 floats in a single double register.
47 assert( !(loc.is_register() && loc.type() == Location::float_in_dbl), "Sparc does not handle callee-save floats yet" );
48 #endif // SPARC
49
50 // First find address of value
51
52 address value_addr = loc.is_register()
53 // Value was in a callee-save register
54 ? reg_map->location(VMRegImpl::as_VMReg(loc.register_number()))
55 // Else value was directly saved on the stack. The frame's original stack pointer,
56 // before any extension by its callee (due to Compiler1 linkage on SPARC), must be used.
57 : ((address)fr->unextended_sp()) + loc.stack_offset();
58
59 // Then package it right depending on type
60 // Note: the transfer of the data is thru a union that contains
61 // an intptr_t. This is because an interpreter stack slot is
62 // really an intptr_t. The use of a union containing an intptr_t
63 // ensures that on a 64 bit platform we have proper alignment
64 // and that we store the value where the interpreter will expect
65 // to find it (i.e. proper endian). Similarly on a 32bit platform
66 // using the intptr_t ensures that when a value is larger than
67 // a stack slot (jlong/jdouble) that we capture the proper part
68 // of the value for the stack slot in question.
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1 /*
2 * Copyright (c) 1997, 2020, 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 "runtime/stackValue.hpp"
32 #if INCLUDE_ZGC
33 #include "gc/z/zBarrier.inline.hpp"
34 #endif
35 #if INCLUDE_SHENANDOAHGC
36 #include "gc/shenandoah/shenandoahBarrierSet.hpp"
37 #endif
38
39 StackValue* StackValue::create_stack_value(const frame* fr, const RegisterMap* reg_map, ScopeValue* sv) {
40 if (sv->is_location()) {
41 // Stack or register value
42 Location loc = ((LocationValue *)sv)->location();
43
44 // First find address of value
45
46 address value_addr = loc.is_register()
47 // Value was in a callee-save register
48 ? reg_map->location(VMRegImpl::as_VMReg(loc.register_number()))
49 // Else value was directly saved on the stack. The frame's original stack pointer,
50 // before any extension by its callee (due to Compiler1 linkage on SPARC), must be used.
51 : ((address)fr->unextended_sp()) + loc.stack_offset();
52
53 // Then package it right depending on type
54 // Note: the transfer of the data is thru a union that contains
55 // an intptr_t. This is because an interpreter stack slot is
56 // really an intptr_t. The use of a union containing an intptr_t
57 // ensures that on a 64 bit platform we have proper alignment
58 // and that we store the value where the interpreter will expect
59 // to find it (i.e. proper endian). Similarly on a 32bit platform
60 // using the intptr_t ensures that when a value is larger than
61 // a stack slot (jlong/jdouble) that we capture the proper part
62 // of the value for the stack slot in question.
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