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
33 StackValue* StackValue::create_stack_value(const frame* fr, const RegisterMap* reg_map, ScopeValue* sv) {
34 if (sv->is_location()) {
35 // Stack or register value
36 Location loc = ((LocationValue *)sv)->location();
37
38 #ifdef SPARC
39 // %%%%% Callee-save floats will NOT be working on a Sparc until we
40 // handle the case of a 2 floats in a single double register.
41 assert( !(loc.is_register() && loc.type() == Location::float_in_dbl), "Sparc does not handle callee-save floats yet" );
42 #endif // SPARC
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();
102 value.noop = (narrowOop) *(julong*) value_addr;
103 } else {
104 value.noop = *(narrowOop*) value_addr;
105 }
106 // Decode narrowoop and wrap a handle around the oop
107 Handle h(Thread::current(), CompressedOops::decode(value.noop));
108 return new StackValue(h);
109 }
110 #endif
111 case Location::oop: {
112 oop val = *(oop *)value_addr;
113 #ifdef _LP64
114 if (Universe::is_narrow_oop_base(val)) {
115 // Compiled code may produce decoded oop = narrow_oop_base
116 // when a narrow oop implicit null check is used.
117 // The narrow_oop_base could be NULL or be the address
118 // of the page below heap. Use NULL value for both cases.
119 val = (oop)NULL;
120 }
121 #endif
122 Handle h(Thread::current(), val); // Wrap a handle around the oop
123 return new StackValue(h);
124 }
125 case Location::addr: {
126 ShouldNotReachHere(); // both C1 and C2 now inline jsrs
127 }
128 case Location::normal: {
129 // Just copy all other bits straight through
130 union { intptr_t p; jint ji;} value;
131 value.p = (intptr_t) CONST64(0xDEADDEAFDEADDEAF);
132 value.ji = *(jint*)value_addr;
133 return new StackValue(value.p);
134 }
135 case Location::invalid:
136 return new StackValue();
137 default:
138 ShouldNotReachHere();
139 }
140
141 } else if (sv->is_constant_int()) {
|
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
36 StackValue* StackValue::create_stack_value(const frame* fr, const RegisterMap* reg_map, ScopeValue* sv) {
37 if (sv->is_location()) {
38 // Stack or register value
39 Location loc = ((LocationValue *)sv)->location();
40
41 #ifdef SPARC
42 // %%%%% Callee-save floats will NOT be working on a Sparc until we
43 // handle the case of a 2 floats in a single double register.
44 assert( !(loc.is_register() && loc.type() == Location::float_in_dbl), "Sparc does not handle callee-save floats yet" );
45 #endif // SPARC
46
47 // First find address of value
48
49 address value_addr = loc.is_register()
50 // Value was in a callee-save register
51 ? reg_map->location(VMRegImpl::as_VMReg(loc.register_number()))
52 // Else value was directly saved on the stack. The frame's original stack pointer,
53 // before any extension by its callee (due to Compiler1 linkage on SPARC), must be used.
54 : ((address)fr->unextended_sp()) + loc.stack_offset();
105 value.noop = (narrowOop) *(julong*) value_addr;
106 } else {
107 value.noop = *(narrowOop*) value_addr;
108 }
109 // Decode narrowoop and wrap a handle around the oop
110 Handle h(Thread::current(), CompressedOops::decode(value.noop));
111 return new StackValue(h);
112 }
113 #endif
114 case Location::oop: {
115 oop val = *(oop *)value_addr;
116 #ifdef _LP64
117 if (Universe::is_narrow_oop_base(val)) {
118 // Compiled code may produce decoded oop = narrow_oop_base
119 // when a narrow oop implicit null check is used.
120 // The narrow_oop_base could be NULL or be the address
121 // of the page below heap. Use NULL value for both cases.
122 val = (oop)NULL;
123 }
124 #endif
125 #if INCLUDE_ZGC
126 // Deoptimization must make sure all oop have passed load barrier
127 if (UseZGC) {
128 val = ZBarrier::load_barrier_on_oop_field_preloaded((oop*)value_addr, val);
129 }
130 #endif
131
132 Handle h(Thread::current(), val); // Wrap a handle around the oop
133 return new StackValue(h);
134 }
135 case Location::addr: {
136 ShouldNotReachHere(); // both C1 and C2 now inline jsrs
137 }
138 case Location::normal: {
139 // Just copy all other bits straight through
140 union { intptr_t p; jint ji;} value;
141 value.p = (intptr_t) CONST64(0xDEADDEAFDEADDEAF);
142 value.ji = *(jint*)value_addr;
143 return new StackValue(value.p);
144 }
145 case Location::invalid:
146 return new StackValue();
147 default:
148 ShouldNotReachHere();
149 }
150
151 } else if (sv->is_constant_int()) {
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