Mercurial > hg > truffle
annotate src/cpu/x86/vm/compiledIC_x86.cpp @ 18452:94b184d89f11
FrameMappingToolImpl: inline TrackedVirtualStackSlot.transform().
author | Josef Eisl <josef.eisl@jku.at> |
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date | Mon, 17 Nov 2014 19:32:05 +0100 |
parents | 52b4284cb496 |
children | 72a3e3995879 |
rev | line source |
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1 /* |
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2 * Copyright (c) 1997, 2014, 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 |
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34 // Release the CompiledICHolder* associated with this call site is there is one. |
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35 void CompiledIC::cleanup_call_site(virtual_call_Relocation* call_site) { |
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36 // This call site might have become stale so inspect it carefully. |
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37 NativeCall* call = nativeCall_at(call_site->addr()); |
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38 if (is_icholder_entry(call->destination())) { |
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39 NativeMovConstReg* value = nativeMovConstReg_at(call_site->cached_value()); |
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40 InlineCacheBuffer::queue_for_release((CompiledICHolder*)value->data()); |
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41 } |
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42 } |
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43 |
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44 bool CompiledIC::is_icholder_call_site(virtual_call_Relocation* call_site) { |
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45 // This call site might have become stale so inspect it carefully. |
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46 NativeCall* call = nativeCall_at(call_site->addr()); |
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47 return is_icholder_entry(call->destination()); |
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48 } |
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49 |
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50 //----------------------------------------------------------------------------- |
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51 // High-level access to an inline cache. Guaranteed to be MT-safe. |
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52 |
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53 CompiledIC::CompiledIC(nmethod* nm, NativeCall* call) |
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54 : _ic_call(call) |
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55 { |
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56 address ic_call = call->instruction_address(); |
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57 |
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58 assert(ic_call != NULL, "ic_call address must be set"); |
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59 assert(nm != NULL, "must pass nmethod"); |
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60 assert(nm->contains(ic_call), "must be in nmethod"); |
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61 |
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62 // Search for the ic_call at the given address. |
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63 RelocIterator iter(nm, ic_call, ic_call+1); |
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64 bool ret = iter.next(); |
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65 assert(ret == true, "relocInfo must exist at this address"); |
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66 assert(iter.addr() == ic_call, "must find ic_call"); |
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67 if (iter.type() == relocInfo::virtual_call_type) { |
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68 virtual_call_Relocation* r = iter.virtual_call_reloc(); |
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69 _is_optimized = false; |
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70 _value = nativeMovConstReg_at(r->cached_value()); |
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71 } else { |
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72 assert(iter.type() == relocInfo::opt_virtual_call_type, "must be a virtual call"); |
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73 _is_optimized = true; |
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74 _value = NULL; |
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75 } |
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76 } |
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77 |
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78 // ---------------------------------------------------------------------------- |
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79 |
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80 #define __ _masm. |
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81 void CompiledStaticCall::emit_to_interp_stub(CodeBuffer &cbuf, address mark) { |
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82 // Stub is fixed up when the corresponding call is converted from |
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83 // calling compiled code to calling interpreted code. |
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84 // movq rbx, 0 |
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85 // jmp -5 # to self |
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86 |
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87 if (mark == NULL) { |
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88 mark = cbuf.insts_mark(); // Get mark within main instrs section. |
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89 } |
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90 |
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91 // Note that the code buffer's insts_mark is always relative to insts. |
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92 // That's why we must use the macroassembler to generate a stub. |
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93 MacroAssembler _masm(&cbuf); |
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94 |
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95 address base = |
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96 __ start_a_stub(to_interp_stub_size()); |
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97 guarantee(base != NULL, "out of space"); |
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98 |
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99 // Static stub relocation stores the instruction address of the call. |
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100 __ relocate(static_stub_Relocation::spec(mark), Assembler::imm_operand); |
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101 // Static stub relocation also tags the Method* in the code-stream. |
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102 __ mov_metadata(rbx, (Metadata*) NULL); // Method is zapped till fixup time. |
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103 // This is recognized as unresolved by relocs/nativeinst/ic code. |
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104 __ jump(RuntimeAddress(__ pc())); |
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105 |
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106 assert(__ pc() - base <= to_interp_stub_size(), "wrong stub size"); |
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107 |
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108 // Update current stubs pointer and restore insts_end. |
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109 __ end_a_stub(); |
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110 } |
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111 #undef __ |
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112 |
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113 int CompiledStaticCall::to_interp_stub_size() { |
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114 return NOT_LP64(10) // movl; jmp |
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115 LP64_ONLY(15); // movq (1+1+8); jmp (1+4) |
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116 } |
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117 |
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118 // Relocation entries for call stub, compiled java to interpreter. |
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119 int CompiledStaticCall::reloc_to_interp_stub() { |
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120 return 4; // 3 in emit_to_interp_stub + 1 in emit_call |
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121 } |
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122 |
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123 void CompiledStaticCall::set_to_interpreted(methodHandle callee, address entry) { |
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124 address stub = find_stub(); |
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125 guarantee(stub != NULL, "stub not found"); |
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126 |
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127 if (TraceICs) { |
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128 ResourceMark rm; |
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129 tty->print_cr("CompiledStaticCall@" INTPTR_FORMAT ": set_to_interpreted %s", |
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130 p2i(instruction_address()), |
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131 callee->name_and_sig_as_C_string()); |
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132 } |
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133 |
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134 // Creation also verifies the object. |
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135 NativeMovConstReg* method_holder = nativeMovConstReg_at(stub); |
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136 NativeJump* jump = nativeJump_at(method_holder->next_instruction_address()); |
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137 |
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138 assert(method_holder->data() == 0 || method_holder->data() == (intptr_t)callee(), |
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139 "a) MT-unsafe modification of inline cache"); |
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140 assert(jump->jump_destination() == (address)-1 || jump->jump_destination() == entry, |
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141 "b) MT-unsafe modification of inline cache"); |
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142 |
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143 // Update stub. |
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144 method_holder->set_data((intptr_t)callee()); |
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145 jump->set_jump_destination(entry); |
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146 |
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147 // Update jump to call. |
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148 set_destination_mt_safe(stub); |
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149 } |
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150 |
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151 void CompiledStaticCall::set_stub_to_clean(static_stub_Relocation* static_stub) { |
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152 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "mt unsafe call"); |
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153 // Reset stub. |
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154 address stub = static_stub->addr(); |
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155 assert(stub != NULL, "stub not found"); |
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156 // Creation also verifies the object. |
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157 NativeMovConstReg* method_holder = nativeMovConstReg_at(stub); |
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158 NativeJump* jump = nativeJump_at(method_holder->next_instruction_address()); |
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159 method_holder->set_data(0); |
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160 jump->set_jump_destination((address)-1); |
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161 } |
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162 |
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163 //----------------------------------------------------------------------------- |
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164 // Non-product mode code |
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165 #ifndef PRODUCT |
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166 |
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167 void CompiledStaticCall::verify() { |
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168 // Verify call. |
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169 NativeCall::verify(); |
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170 if (os::is_MP()) { |
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171 verify_alignment(); |
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172 } |
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173 |
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174 // Verify stub. |
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175 address stub = find_stub(); |
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176 assert(stub != NULL, "no stub found for static call"); |
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177 // Creation also verifies the object. |
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178 NativeMovConstReg* method_holder = nativeMovConstReg_at(stub); |
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179 NativeJump* jump = nativeJump_at(method_holder->next_instruction_address()); |
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180 |
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181 // Verify state. |
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182 assert(is_clean() || is_call_to_compiled() || is_call_to_interpreted(), "sanity check"); |
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183 } |
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184 |
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185 #endif // !PRODUCT |