Mercurial > hg > graal-compiler
annotate src/share/vm/runtime/stackValue.cpp @ 18096:ca6d25be853b jdk8u25-b13
8044269: Analysis of archive files.
Summary: Add checksum verification.
Reviewed-by: iklam, dholmes, mschoene
| author | jiangli |
|---|---|
| date | Tue, 12 Aug 2014 17:46:16 -0400 |
| parents | 78bbf4d43a14 |
| children | 52b4284cb496 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "code/debugInfo.hpp" | |
| 27 #include "oops/oop.inline.hpp" | |
| 28 #include "runtime/frame.inline.hpp" | |
| 29 #include "runtime/handles.inline.hpp" | |
| 30 #include "runtime/stackValue.hpp" | |
| 0 | 31 |
| 32 StackValue* StackValue::create_stack_value(const frame* fr, const RegisterMap* reg_map, ScopeValue* sv) { | |
| 33 if (sv->is_location()) { | |
| 34 // Stack or register value | |
| 35 Location loc = ((LocationValue *)sv)->location(); | |
| 36 | |
| 37 #ifdef SPARC | |
| 38 // %%%%% Callee-save floats will NOT be working on a Sparc until we | |
| 39 // handle the case of a 2 floats in a single double register. | |
| 40 assert( !(loc.is_register() && loc.type() == Location::float_in_dbl), "Sparc does not handle callee-save floats yet" ); | |
| 41 #endif // SPARC | |
| 42 | |
| 43 // First find address of value | |
| 44 | |
| 45 address value_addr = loc.is_register() | |
| 46 // Value was in a callee-save register | |
| 47 ? reg_map->location(VMRegImpl::as_VMReg(loc.register_number())) | |
| 48 // Else value was directly saved on the stack. The frame's original stack pointer, | |
| 49 // before any extension by its callee (due to Compiler1 linkage on SPARC), must be used. | |
| 50 : ((address)fr->unextended_sp()) + loc.stack_offset(); | |
| 51 | |
| 52 // Then package it right depending on type | |
| 53 // Note: the transfer of the data is thru a union that contains | |
| 54 // an intptr_t. This is because an interpreter stack slot is | |
| 55 // really an intptr_t. The use of a union containing an intptr_t | |
| 56 // ensures that on a 64 bit platform we have proper alignment | |
| 57 // and that we store the value where the interpreter will expect | |
| 58 // to find it (i.e. proper endian). Similarly on a 32bit platform | |
| 59 // using the intptr_t ensures that when a value is larger than | |
| 60 // a stack slot (jlong/jdouble) that we capture the proper part | |
| 61 // of the value for the stack slot in question. | |
| 62 // | |
| 63 switch( loc.type() ) { | |
| 64 case Location::float_in_dbl: { // Holds a float in a double register? | |
| 65 // The callee has no clue whether the register holds a float, | |
| 66 // double or is unused. He always saves a double. Here we know | |
| 67 // a double was saved, but we only want a float back. Narrow the | |
| 68 // saved double to the float that the JVM wants. | |
| 69 assert( loc.is_register(), "floats always saved to stack in 1 word" ); | |
| 70 union { intptr_t p; jfloat jf; } value; | |
| 71 value.p = (intptr_t) CONST64(0xDEADDEAFDEADDEAF); | |
| 72 value.jf = (jfloat) *(jdouble*) value_addr; | |
| 73 return new StackValue(value.p); // 64-bit high half is stack junk | |
| 74 } | |
| 75 case Location::int_in_long: { // Holds an int in a long register? | |
| 76 // The callee has no clue whether the register holds an int, | |
| 77 // long or is unused. He always saves a long. Here we know | |
| 78 // a long was saved, but we only want an int back. Narrow the | |
| 79 // saved long to the int that the JVM wants. | |
| 80 assert( loc.is_register(), "ints always saved to stack in 1 word" ); | |
| 81 union { intptr_t p; jint ji;} value; | |
| 82 value.p = (intptr_t) CONST64(0xDEADDEAFDEADDEAF); | |
| 83 value.ji = (jint) *(jlong*) value_addr; | |
| 84 return new StackValue(value.p); // 64-bit high half is stack junk | |
| 85 } | |
| 86 #ifdef _LP64 | |
| 87 case Location::dbl: | |
| 88 // Double value in an aligned adjacent pair | |
| 89 return new StackValue(*(intptr_t*)value_addr); | |
| 90 case Location::lng: | |
| 91 // Long value in an aligned adjacent pair | |
| 92 return new StackValue(*(intptr_t*)value_addr); | |
| 331 | 93 case Location::narrowoop: { |
| 94 union { intptr_t p; narrowOop noop;} value; | |
| 95 value.p = (intptr_t) CONST64(0xDEADDEAFDEADDEAF); | |
| 96 if (loc.is_register()) { | |
| 97 // The callee has no clue whether the register holds an int, | |
| 98 // long or is unused. He always saves a long. Here we know | |
| 99 // a long was saved, but we only want an int back. Narrow the | |
| 100 // saved long to the int that the JVM wants. | |
| 101 value.noop = (narrowOop) *(julong*) value_addr; | |
| 102 } else { | |
| 103 value.noop = *(narrowOop*) value_addr; | |
| 104 } | |
| 105 // Decode narrowoop and wrap a handle around the oop | |
| 106 Handle h(oopDesc::decode_heap_oop(value.noop)); | |
| 107 return new StackValue(h); | |
| 108 } | |
| 0 | 109 #endif |
| 110 case Location::oop: { | |
| 858 | 111 oop val = *(oop *)value_addr; |
| 112 #ifdef _LP64 | |
| 113 if (Universe::is_narrow_oop_base(val)) { | |
| 114 // Compiled code may produce decoded oop = narrow_oop_base | |
| 115 // when a narrow oop implicit null check is used. | |
| 116 // The narrow_oop_base could be NULL or be the address | |
| 117 // of the page below heap. Use NULL value for both cases. | |
| 118 val = (oop)NULL; | |
| 119 } | |
| 120 #endif | |
| 121 Handle h(val); // Wrap a handle around the oop | |
| 0 | 122 return new StackValue(h); |
| 123 } | |
| 124 case Location::addr: { | |
| 125 ShouldNotReachHere(); // both C1 and C2 now inline jsrs | |
| 126 } | |
| 127 case Location::normal: { | |
| 128 // Just copy all other bits straight through | |
| 129 union { intptr_t p; jint ji;} value; | |
| 130 value.p = (intptr_t) CONST64(0xDEADDEAFDEADDEAF); | |
| 131 value.ji = *(jint*)value_addr; | |
| 132 return new StackValue(value.p); | |
| 133 } | |
| 134 case Location::invalid: | |
| 135 return new StackValue(); | |
| 136 default: | |
| 137 ShouldNotReachHere(); | |
| 138 } | |
| 139 | |
| 140 } else if (sv->is_constant_int()) { | |
| 141 // Constant int: treat same as register int. | |
| 142 union { intptr_t p; jint ji;} value; | |
| 143 value.p = (intptr_t) CONST64(0xDEADDEAFDEADDEAF); | |
| 144 value.ji = (jint)((ConstantIntValue*)sv)->value(); | |
| 145 return new StackValue(value.p); | |
| 146 } else if (sv->is_constant_oop()) { | |
| 147 // constant oop | |
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148 return new StackValue(sv->as_ConstantOopReadValue()->value()); |
| 0 | 149 #ifdef _LP64 |
| 150 } else if (sv->is_constant_double()) { | |
| 151 // Constant double in a single stack slot | |
| 152 union { intptr_t p; double d; } value; | |
| 153 value.p = (intptr_t) CONST64(0xDEADDEAFDEADDEAF); | |
| 154 value.d = ((ConstantDoubleValue *)sv)->value(); | |
| 155 return new StackValue(value.p); | |
| 156 } else if (sv->is_constant_long()) { | |
| 157 // Constant long in a single stack slot | |
| 158 union { intptr_t p; jlong jl; } value; | |
| 159 value.p = (intptr_t) CONST64(0xDEADDEAFDEADDEAF); | |
| 160 value.jl = ((ConstantLongValue *)sv)->value(); | |
| 161 return new StackValue(value.p); | |
| 162 #endif | |
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163 } else if (sv->is_object()) { // Scalar replaced object in compiled frame |
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164 Handle ov = ((ObjectValue *)sv)->value(); |
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165 return new StackValue(ov, (ov.is_null()) ? 1 : 0); |
| 0 | 166 } |
| 167 | |
| 168 // Unknown ScopeValue type | |
| 169 ShouldNotReachHere(); | |
| 170 return new StackValue((intptr_t) 0); // dummy | |
| 171 } | |
| 172 | |
| 173 | |
| 174 BasicLock* StackValue::resolve_monitor_lock(const frame* fr, Location location) { | |
| 175 assert(location.is_stack(), "for now we only look at the stack"); | |
| 176 int word_offset = location.stack_offset() / wordSize; | |
| 177 // (stack picture) | |
| 178 // high: [ ] word_offset + 1 | |
| 179 // low [ ] word_offset | |
| 180 // | |
| 181 // sp-> [ ] 0 | |
| 182 // the word_offset is the distance from the stack pointer to the lowest address | |
| 183 // The frame's original stack pointer, before any extension by its callee | |
| 184 // (due to Compiler1 linkage on SPARC), must be used. | |
| 185 return (BasicLock*) (fr->unextended_sp() + word_offset); | |
| 186 } | |
| 187 | |
| 188 | |
| 189 #ifndef PRODUCT | |
| 190 | |
| 191 void StackValue::print_on(outputStream* st) const { | |
| 192 switch(_type) { | |
| 193 case T_INT: | |
| 194 st->print("%d (int) %f (float) %x (hex)", *(int *)&_i, *(float *)&_i, *(int *)&_i); | |
| 195 break; | |
| 196 | |
| 197 case T_OBJECT: | |
| 198 _o()->print_value_on(st); | |
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199 st->print(" <" INTPTR_FORMAT ">", p2i((address)_o())); |
| 0 | 200 break; |
| 201 | |
| 202 case T_CONFLICT: | |
| 203 st->print("conflict"); | |
| 204 break; | |
| 205 | |
| 206 default: | |
| 207 ShouldNotReachHere(); | |
| 208 } | |
| 209 } | |
| 210 | |
| 211 #endif |