Mercurial > hg > graal-compiler
annotate src/share/vm/code/vmreg.hpp @ 3992:d1bdeef3e3e2
7098282: G1: assert(interval >= 0) failed: Sanity check, referencePolicy.cpp: 76
Summary: There is a race between one thread successfully forwarding and copying the klass mirror for the SoftReference class (including the static master clock) and another thread attempting to use the master clock while attempting to discover a soft reference object. Maintain a shadow copy of the soft reference master clock and use the shadow during reference discovery and reference processing.
Reviewed-by: tonyp, brutisso, ysr
| author | johnc |
|---|---|
| date | Wed, 12 Oct 2011 10:25:51 -0700 |
| parents | 1d1603768966 |
| children | 2c368ea3e844 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1998, 2011, 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 #ifndef SHARE_VM_CODE_VMREG_HPP |
| 26 #define SHARE_VM_CODE_VMREG_HPP | |
| 27 | |
| 28 #include "memory/allocation.hpp" | |
| 29 #include "utilities/globalDefinitions.hpp" | |
| 30 #ifdef TARGET_ARCH_x86 | |
| 31 # include "register_x86.hpp" | |
| 32 #endif | |
| 33 #ifdef TARGET_ARCH_sparc | |
| 34 # include "register_sparc.hpp" | |
| 35 #endif | |
| 36 #ifdef TARGET_ARCH_zero | |
| 37 # include "register_zero.hpp" | |
| 38 #endif | |
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39 #ifdef TARGET_ARCH_arm |
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40 # include "register_arm.hpp" |
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41 #endif |
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42 #ifdef TARGET_ARCH_ppc |
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43 # include "register_ppc.hpp" |
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44 #endif |
| 1972 | 45 #ifdef COMPILER2 |
| 46 #include "opto/adlcVMDeps.hpp" | |
| 47 #include "utilities/ostream.hpp" | |
| 48 #ifdef TARGET_ARCH_MODEL_x86_32 | |
| 49 # include "adfiles/adGlobals_x86_32.hpp" | |
| 50 #endif | |
| 51 #ifdef TARGET_ARCH_MODEL_x86_64 | |
| 52 # include "adfiles/adGlobals_x86_64.hpp" | |
| 53 #endif | |
| 54 #ifdef TARGET_ARCH_MODEL_sparc | |
| 55 # include "adfiles/adGlobals_sparc.hpp" | |
| 56 #endif | |
| 57 #ifdef TARGET_ARCH_MODEL_zero | |
| 58 # include "adfiles/adGlobals_zero.hpp" | |
| 59 #endif | |
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60 #ifdef TARGET_ARCH_MODEL_arm |
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61 # include "adfiles/adGlobals_arm.hpp" |
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62 #endif |
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63 #ifdef TARGET_ARCH_MODEL_ppc |
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64 # include "adfiles/adGlobals_ppc.hpp" |
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65 #endif |
| 1972 | 66 #endif |
| 67 | |
| 0 | 68 //------------------------------VMReg------------------------------------------ |
| 69 // The VM uses 'unwarped' stack slots; the compiler uses 'warped' stack slots. | |
| 70 // Register numbers below VMRegImpl::stack0 are the same for both. Register | |
| 71 // numbers above stack0 are either warped (in the compiler) or unwarped | |
| 72 // (in the VM). Unwarped numbers represent stack indices, offsets from | |
| 73 // the current stack pointer. Warped numbers are required during compilation | |
| 74 // when we do not yet know how big the frame will be. | |
| 75 | |
| 76 class VMRegImpl; | |
| 77 typedef VMRegImpl* VMReg; | |
| 78 | |
| 79 class VMRegImpl { | |
| 80 // friend class OopMap; | |
| 81 friend class VMStructs; | |
| 82 friend class OptoReg; | |
| 83 // friend class Location; | |
| 84 private: | |
| 85 enum { | |
| 86 BAD = -1 | |
| 87 }; | |
| 88 | |
| 89 | |
| 90 | |
| 91 static VMReg stack0; | |
| 92 // Names for registers | |
| 93 static const char *regName[]; | |
| 94 static const int register_count; | |
| 95 | |
| 96 | |
| 97 public: | |
| 98 | |
| 99 static VMReg as_VMReg(int val, bool bad_ok = false) { assert(val > BAD || bad_ok, "invalid"); return (VMReg) (intptr_t) val; } | |
| 100 | |
| 101 const char* name() { | |
| 102 if (is_reg()) { | |
| 103 return regName[value()]; | |
| 104 } else if (!is_valid()) { | |
| 105 return "BAD"; | |
| 106 } else { | |
| 107 // shouldn't really be called with stack | |
| 108 return "STACKED REG"; | |
| 109 } | |
| 110 } | |
| 111 static VMReg Bad() { return (VMReg) (intptr_t) BAD; } | |
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112 bool is_valid() const { return ((intptr_t) this) != BAD; } |
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113 bool is_stack() const { return (intptr_t) this >= (intptr_t) stack0; } |
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114 bool is_reg() const { return is_valid() && !is_stack(); } |
| 0 | 115 |
| 116 // A concrete register is a value that returns true for is_reg() and is | |
| 117 // also a register you could use in the assembler. On machines with | |
| 118 // 64bit registers only one half of the VMReg (and OptoReg) is considered | |
| 119 // concrete. | |
| 120 bool is_concrete(); | |
| 121 | |
| 122 // VMRegs are 4 bytes wide on all platforms | |
| 123 static const int stack_slot_size; | |
| 124 static const int slots_per_word; | |
| 125 | |
| 126 | |
| 127 // This really ought to check that the register is "real" in the sense that | |
| 128 // we don't try and get the VMReg number of a physical register that doesn't | |
| 129 // have an expressible part. That would be pd specific code | |
| 130 VMReg next() { | |
| 131 assert((is_reg() && value() < stack0->value() - 1) || is_stack(), "must be"); | |
| 132 return (VMReg)(intptr_t)(value() + 1); | |
| 133 } | |
| 134 VMReg prev() { | |
| 135 assert((is_stack() && value() > stack0->value()) || (is_reg() && value() != 0), "must be"); | |
| 136 return (VMReg)(intptr_t)(value() - 1); | |
| 137 } | |
| 138 | |
| 139 | |
| 140 intptr_t value() const {return (intptr_t) this; } | |
| 141 | |
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142 void print_on(outputStream* st) const; |
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143 void print() const { print_on(tty); } |
| 0 | 144 |
| 145 // bias a stack slot. | |
| 146 // Typically used to adjust a virtual frame slots by amounts that are offset by | |
| 147 // amounts that are part of the native abi. The VMReg must be a stack slot | |
| 148 // and the result must be also. | |
| 149 | |
| 150 VMReg bias(int offset) { | |
| 151 assert(is_stack(), "must be"); | |
| 152 // VMReg res = VMRegImpl::as_VMReg(value() + offset); | |
| 153 VMReg res = stack2reg(reg2stack() + offset); | |
| 154 assert(res->is_stack(), "must be"); | |
| 155 return res; | |
| 156 } | |
| 157 | |
| 158 // Convert register numbers to stack slots and vice versa | |
| 159 static VMReg stack2reg( int idx ) { | |
| 160 return (VMReg) (intptr_t) (stack0->value() + idx); | |
| 161 } | |
| 162 | |
| 163 uintptr_t reg2stack() { | |
| 164 assert( is_stack(), "Not a stack-based register" ); | |
| 165 return value() - stack0->value(); | |
| 166 } | |
| 167 | |
| 168 static void set_regName(); | |
| 169 | |
| 1972 | 170 #ifdef TARGET_ARCH_x86 |
| 171 # include "vmreg_x86.hpp" | |
| 172 #endif | |
| 173 #ifdef TARGET_ARCH_sparc | |
| 174 # include "vmreg_sparc.hpp" | |
| 175 #endif | |
| 176 #ifdef TARGET_ARCH_zero | |
| 177 # include "vmreg_zero.hpp" | |
| 178 #endif | |
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179 #ifdef TARGET_ARCH_arm |
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180 # include "vmreg_arm.hpp" |
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181 #endif |
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182 #ifdef TARGET_ARCH_ppc |
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183 # include "vmreg_ppc.hpp" |
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184 #endif |
| 1972 | 185 |
| 0 | 186 |
| 187 }; | |
| 188 | |
| 189 //---------------------------VMRegPair------------------------------------------- | |
| 190 // Pairs of 32-bit registers for arguments. | |
| 191 // SharedRuntime::java_calling_convention will overwrite the structs with | |
| 192 // the calling convention's registers. VMRegImpl::Bad is returned for any | |
| 193 // unused 32-bit register. This happens for the unused high half of Int | |
| 194 // arguments, or for 32-bit pointers or for longs in the 32-bit sparc build | |
| 195 // (which are passed to natives in low 32-bits of e.g. O0/O1 and the high | |
| 196 // 32-bits of O0/O1 are set to VMRegImpl::Bad). Longs in one register & doubles | |
| 197 // always return a high and a low register, as do 64-bit pointers. | |
| 198 // | |
| 199 class VMRegPair { | |
| 200 private: | |
| 201 VMReg _second; | |
| 202 VMReg _first; | |
| 203 public: | |
| 204 void set_bad ( ) { _second=VMRegImpl::Bad(); _first=VMRegImpl::Bad(); } | |
| 205 void set1 ( VMReg v ) { _second=VMRegImpl::Bad(); _first=v; } | |
| 206 void set2 ( VMReg v ) { _second=v->next(); _first=v; } | |
| 207 void set_pair( VMReg second, VMReg first ) { _second= second; _first= first; } | |
| 208 void set_ptr ( VMReg ptr ) { | |
| 209 #ifdef _LP64 | |
| 210 _second = ptr->next(); | |
| 211 #else | |
| 212 _second = VMRegImpl::Bad(); | |
| 213 #endif | |
| 214 _first = ptr; | |
| 215 } | |
| 216 // Return true if single register, even if the pair is really just adjacent stack slots | |
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217 bool is_single_reg() const { |
| 0 | 218 return (_first->is_valid()) && (_first->value() + 1 == _second->value()); |
| 219 } | |
| 220 | |
| 221 // Return true if single stack based "register" where the slot alignment matches input alignment | |
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222 bool is_adjacent_on_stack(int alignment) const { |
| 0 | 223 return (_first->is_stack() && (_first->value() + 1 == _second->value()) && ((_first->value() & (alignment-1)) == 0)); |
| 224 } | |
| 225 | |
| 226 // Return true if single stack based "register" where the slot alignment matches input alignment | |
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227 bool is_adjacent_aligned_on_stack(int alignment) const { |
| 0 | 228 return (_first->is_stack() && (_first->value() + 1 == _second->value()) && ((_first->value() & (alignment-1)) == 0)); |
| 229 } | |
| 230 | |
| 231 // Return true if single register but adjacent stack slots do not count | |
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232 bool is_single_phys_reg() const { |
| 0 | 233 return (_first->is_reg() && (_first->value() + 1 == _second->value())); |
| 234 } | |
| 235 | |
| 236 VMReg second() const { return _second; } | |
| 237 VMReg first() const { return _first; } | |
| 238 VMRegPair(VMReg s, VMReg f) { _second = s; _first = f; } | |
| 239 VMRegPair(VMReg f) { _second = VMRegImpl::Bad(); _first = f; } | |
| 240 VMRegPair() { _second = VMRegImpl::Bad(); _first = VMRegImpl::Bad(); } | |
| 241 }; | |
| 1972 | 242 |
| 243 #endif // SHARE_VM_CODE_VMREG_HPP |