annotate src/cpu/sparc/vm/compiledIC_sparc.cpp @ 24183:db221c0a423e jdk8u131-b08

Added tag jdk8u131-b07 for changeset 5b3cb4fbdbc7
author asaha
date Mon, 13 Feb 2017 11:58:54 -0800
parents c3d0bd36ab28
children 9b69cec6d01b
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1 /*
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2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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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.
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22 *
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23 */
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24
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25 #include "precompiled.hpp"
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26 #include "asm/macroAssembler.inline.hpp"
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27 #include "code/compiledIC.hpp"
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28 #include "code/icBuffer.hpp"
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29 #include "code/nmethod.hpp"
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30 #include "memory/resourceArea.hpp"
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31 #include "runtime/mutexLocker.hpp"
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32 #include "runtime/safepoint.hpp"
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33 #ifdef COMPILER2
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34 #include "opto/matcher.hpp"
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35 #endif
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36
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37 // Release the CompiledICHolder* associated with this call site is there is one.
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38 void CompiledIC::cleanup_call_site(virtual_call_Relocation* call_site) {
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39 // This call site might have become stale so inspect it carefully.
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40 NativeCall* call = nativeCall_at(call_site->addr());
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41 if (is_icholder_entry(call->destination())) {
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42 NativeMovConstReg* value = nativeMovConstReg_at(call_site->cached_value());
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43 InlineCacheBuffer::queue_for_release((CompiledICHolder*)value->data());
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44 }
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45 }
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46
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47 bool CompiledIC::is_icholder_call_site(virtual_call_Relocation* call_site) {
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48 // This call site might have become stale so inspect it carefully.
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49 NativeCall* call = nativeCall_at(call_site->addr());
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50 return is_icholder_entry(call->destination());
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51 }
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52
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53 // ----------------------------------------------------------------------------
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54
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55 #define __ _masm.
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56 address CompiledStaticCall::emit_to_interp_stub(CodeBuffer &cbuf) {
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57 #ifdef COMPILER2
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58 // Stub is fixed up when the corresponding call is converted from calling
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59 // compiled code to calling interpreted code.
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60 // set (empty), G5
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61 // jmp -1
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62
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63 address mark = cbuf.insts_mark(); // Get mark within main instrs section.
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64
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65 MacroAssembler _masm(&cbuf);
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66
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67 address base = __ start_a_stub(to_interp_stub_size());
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68 if (base == NULL) {
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69 return NULL; // CodeBuffer::expand failed.
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70 }
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71
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72 // Static stub relocation stores the instruction address of the call.
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73 __ relocate(static_stub_Relocation::spec(mark));
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74
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75 __ set_metadata(NULL, as_Register(Matcher::inline_cache_reg_encode()));
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76
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77 __ set_inst_mark();
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78 AddressLiteral addrlit(-1);
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79 __ JUMP(addrlit, G3, 0);
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80
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81 __ delayed()->nop();
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82
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83 // Update current stubs pointer and restore code_end.
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84 __ end_a_stub();
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85 return base;
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86 #else
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87 ShouldNotReachHere();
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88 #endif
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89 }
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90 #undef __
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91
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92 int CompiledStaticCall::to_interp_stub_size() {
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93 // This doesn't need to be accurate but it must be larger or equal to
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94 // the real size of the stub.
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95 return (NativeMovConstReg::instruction_size + // sethi/setlo;
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96 NativeJump::instruction_size + // sethi; jmp; nop
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97 (TraceJumps ? 20 * BytesPerInstWord : 0) );
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98 }
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99
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100 // Relocation entries for call stub, compiled java to interpreter.
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101 int CompiledStaticCall::reloc_to_interp_stub() {
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102 return 10; // 4 in emit_java_to_interp + 1 in Java_Static_Call
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103 }
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104
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105 void CompiledStaticCall::set_to_interpreted(methodHandle callee, address entry) {
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106 address stub = find_stub();
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107 guarantee(stub != NULL, "stub not found");
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108
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109 if (TraceICs) {
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110 ResourceMark rm;
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111 tty->print_cr("CompiledStaticCall@" INTPTR_FORMAT ": set_to_interpreted %s",
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112 instruction_address(),
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113 callee->name_and_sig_as_C_string());
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114 }
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115
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116 // Creation also verifies the object.
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117 NativeMovConstReg* method_holder = nativeMovConstReg_at(stub);
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118 NativeJump* jump = nativeJump_at(method_holder->next_instruction_address());
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119
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120 assert(method_holder->data() == 0 || method_holder->data() == (intptr_t)callee(),
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121 "a) MT-unsafe modification of inline cache");
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122 assert(jump->jump_destination() == (address)-1 || jump->jump_destination() == entry,
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123 "b) MT-unsafe modification of inline cache");
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124
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125 // Update stub.
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126 method_holder->set_data((intptr_t)callee());
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127 jump->set_jump_destination(entry);
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128
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129 // Update jump to call.
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130 set_destination_mt_safe(stub);
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131 }
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132
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133 void CompiledStaticCall::set_stub_to_clean(static_stub_Relocation* static_stub) {
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134 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "mt unsafe call");
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135 // Reset stub.
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136 address stub = static_stub->addr();
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137 assert(stub != NULL, "stub not found");
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138 // Creation also verifies the object.
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139 NativeMovConstReg* method_holder = nativeMovConstReg_at(stub);
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140 NativeJump* jump = nativeJump_at(method_holder->next_instruction_address());
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141 method_holder->set_data(0);
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142 jump->set_jump_destination((address)-1);
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143 }
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144
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145 //-----------------------------------------------------------------------------
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146 // Non-product mode code
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147 #ifndef PRODUCT
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148
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149 void CompiledStaticCall::verify() {
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150 // Verify call.
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151 NativeCall::verify();
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152 if (os::is_MP()) {
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153 verify_alignment();
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154 }
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155
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156 // Verify stub.
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157 address stub = find_stub();
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158 assert(stub != NULL, "no stub found for static call");
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159 // Creation also verifies the object.
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160 NativeMovConstReg* method_holder = nativeMovConstReg_at(stub);
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161 NativeJump* jump = nativeJump_at(method_holder->next_instruction_address());
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162
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163 // Verify state.
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164 assert(is_clean() || is_call_to_compiled() || is_call_to_interpreted(), "sanity check");
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165 }
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166
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167 #endif // !PRODUCT