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annotate src/cpu/sparc/vm/compiledIC_sparc.cpp @ 20804:7848fc12602b

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Merge with jdk8u40-b25
author Gilles Duboscq <gilles.m.duboscq@oracle.com>
date Tue, 07 Apr 2015 14:58:49 +0200
parents 5c71dcf0915d c64b6b0c40c8
children be896a1983c0
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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 void CompiledStaticCall::emit_to_interp_stub(CodeBuffer &cbuf, address mark) {
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57 // Stub is fixed up when the corresponding call is converted from calling
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58 // compiled code to calling interpreted code.
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59 // set (empty), G5
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60 // jmp -1
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61
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62 if (mark == NULL) {
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63 mark = cbuf.insts_mark(); // Get mark within main instrs section.
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64 }
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65
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66 MacroAssembler _masm(&cbuf);
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67
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68 address base =
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69 __ start_a_stub(to_interp_stub_size());
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70 guarantee(base != NULL, "out of space");
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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, G5);
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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 assert(__ pc() - base <= to_interp_stub_size(), "wrong stub size");
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84
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85 // Update current stubs pointer and restore code_end.
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86 __ end_a_stub();
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87 }
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88 #undef __
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89
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90 int CompiledStaticCall::to_interp_stub_size() {
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91 // This doesn't need to be accurate but it must be larger or equal to
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92 // the real size of the stub.
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93 return (NativeMovConstReg::instruction_size + // sethi/setlo;
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94 NativeJump::instruction_size + // sethi; jmp; nop
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95 (TraceJumps ? 20 * BytesPerInstWord : 0) );
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96 }
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97
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98 // Relocation entries for call stub, compiled java to interpreter.
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99 int CompiledStaticCall::reloc_to_interp_stub() {
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100 return 10; // 4 in emit_java_to_interp + 1 in Java_Static_Call
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101 }
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102
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103 void CompiledStaticCall::set_to_interpreted(methodHandle callee, address entry) {
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104 address stub = find_stub();
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105 #ifdef GRAAL
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106 if (stub == NULL) {
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107 set_destination_mt_safe(entry);
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108 return;
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109 }
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110 #endif
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111 guarantee(stub != NULL, "stub not found");
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112
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113 if (TraceICs) {
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114 ResourceMark rm;
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115 tty->print_cr("CompiledStaticCall@" INTPTR_FORMAT ": set_to_interpreted %s",
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116 instruction_address(),
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117 callee->name_and_sig_as_C_string());
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118 }
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119
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120 // Creation also verifies the object.
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121 NativeMovConstReg* method_holder = nativeMovConstReg_at(stub);
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122 NativeJump* jump = nativeJump_at(method_holder->next_instruction_address());
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123
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124 assert(method_holder->data() == 0 || method_holder->data() == (intptr_t)callee(),
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125 "a) MT-unsafe modification of inline cache");
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126 assert(jump->jump_destination() == (address)-1 || jump->jump_destination() == entry,
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127 "b) MT-unsafe modification of inline cache");
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128
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129 // Update stub.
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130 method_holder->set_data((intptr_t)callee());
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131 jump->set_jump_destination(entry);
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132
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133 // Update jump to call.
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134 set_destination_mt_safe(stub);
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135 }
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136
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137 void CompiledStaticCall::set_stub_to_clean(static_stub_Relocation* static_stub) {
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138 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "mt unsafe call");
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139 // Reset stub.
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140 address stub = static_stub->addr();
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141 assert(stub != NULL, "stub not found");
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142 // Creation also verifies the object.
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143 NativeMovConstReg* method_holder = nativeMovConstReg_at(stub);
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144 NativeJump* jump = nativeJump_at(method_holder->next_instruction_address());
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145 method_holder->set_data(0);
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146 jump->set_jump_destination((address)-1);
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147 }
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148
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149 //-----------------------------------------------------------------------------
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150 // Non-product mode code
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151 #ifndef PRODUCT
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152
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153 void CompiledStaticCall::verify() {
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154 // Verify call.
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155 NativeCall::verify();
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156 if (os::is_MP()) {
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157 verify_alignment();
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158 }
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159
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160 // Verify stub.
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161 address stub = find_stub();
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162 #ifndef GRAAL
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163 assert(stub != NULL, "no stub found for static call");
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164 // Creation also verifies the object.
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165 NativeMovConstReg* method_holder = nativeMovConstReg_at(stub);
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166 NativeJump* jump = nativeJump_at(method_holder->next_instruction_address());
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167 #endif
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168
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169 // Verify state.
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170 assert(is_clean() || is_call_to_compiled() || is_call_to_interpreted(), "sanity check");
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171 }
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172
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173 #endif // !PRODUCT