Mercurial > hg > truffle
annotate src/share/vm/runtime/stackValue.cpp @ 2368:dde920245681
6896099: Integrate CMS heap ergo with default heap sizing ergo
6627787: CMS: JVM refuses to start up with -Xms16m -Xmx16m
7000125: CMS: Anti-monotone young gen sizing with respect to maximum whole heap size specification
7027529: CMS: retire CMSUseOldDefaults flag
Summary: Simplify CMS heap sizing code, relying on ergonomic initial sizing consistent with other collectors for the most part, controlling only young gen sizing to rein in pause times. Make CMS young gen sizing default statically cpu-dependant. Remove inconsistencies wrt generation sizing and policy code, allowing for the fixing for 6627787 and 7000125. For 7027529, retire the flag CMSUseOldDefaults which had been introduced as a bridge from JDK 5 to JDK 6 a number of years ago.
Reviewed-by: brutisso, poonam
| author | ysr |
|---|---|
| date | Wed, 16 Mar 2011 10:37:08 -0700 |
| parents | f95d63e2154a |
| children | 06f017f7daa7 da91efe96a93 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 1997, 2010, 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 | |
| 148 return new StackValue(((ConstantOopReadValue *)sv)->value()); | |
| 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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6837472: com/sun/jdi/MonitorFrameInfo.java fails with AggressiveOpts in 6u14
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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); | |
| 199 st->print(" <" INTPTR_FORMAT ">", (address)_o()); | |
| 200 break; | |
| 201 | |
| 202 case T_CONFLICT: | |
| 203 st->print("conflict"); | |
| 204 break; | |
| 205 | |
| 206 default: | |
| 207 ShouldNotReachHere(); | |
| 208 } | |
| 209 } | |
| 210 | |
| 211 #endif |