Mercurial > hg > truffle
annotate src/cpu/ppc/vm/vtableStubs_ppc_64.cpp @ 18177:89f97291c3a5
Hotspot: Support narrow oop relocations in constants section.
author | Roland Schatz <roland.schatz@oracle.com> |
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date | Mon, 27 Oct 2014 14:24:02 +0100 |
parents | 71a71b0bc844 |
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rev | line source |
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1 /* |
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2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
17807 | 3 * Copyright 2012, 2014 SAP AG. All rights reserved. |
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4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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5 * |
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6 * This code is free software; you can redistribute it and/or modify it |
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7 * under the terms of the GNU General Public License version 2 only, as |
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8 * published by the Free Software Foundation. |
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9 * |
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10 * This code is distributed in the hope that it will be useful, but WITHOUT |
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11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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13 * version 2 for more details (a copy is included in the LICENSE file that |
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14 * accompanied this code). |
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15 * |
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16 * You should have received a copy of the GNU General Public License version |
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17 * 2 along with this work; if not, write to the Free Software Foundation, |
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18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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19 * |
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20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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21 * or visit www.oracle.com if you need additional information or have any |
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22 * questions. |
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23 * |
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24 */ |
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25 |
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26 #include "precompiled.hpp" |
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27 #include "asm/assembler.hpp" |
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28 #include "asm/macroAssembler.inline.hpp" |
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29 #include "code/vtableStubs.hpp" |
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30 #include "interp_masm_ppc_64.hpp" |
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31 #include "memory/resourceArea.hpp" |
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32 #include "oops/instanceKlass.hpp" |
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33 #include "oops/klassVtable.hpp" |
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34 #include "runtime/sharedRuntime.hpp" |
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35 #include "vmreg_ppc.inline.hpp" |
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36 #ifdef COMPILER2 |
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37 #include "opto/runtime.hpp" |
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38 #endif |
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39 |
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40 #define __ masm-> |
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41 |
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42 #ifdef PRODUCT |
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43 #define BLOCK_COMMENT(str) // nothing |
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44 #else |
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45 #define BLOCK_COMMENT(str) __ block_comment(str) |
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46 #endif |
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47 #define BIND(label) bind(label); BLOCK_COMMENT(#label ":") |
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48 |
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49 #ifndef PRODUCT |
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50 extern "C" void bad_compiled_vtable_index(JavaThread* thread, oopDesc* receiver, int index); |
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51 #endif |
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52 |
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53 // Used by compiler only; may use only caller saved, non-argument |
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54 // registers. |
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55 VtableStub* VtableStubs::create_vtable_stub(int vtable_index) { |
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56 // PPC port: use fixed size. |
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57 const int code_length = VtableStub::pd_code_size_limit(true); |
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58 VtableStub* s = new (code_length) VtableStub(true, vtable_index); |
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59 ResourceMark rm; |
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60 CodeBuffer cb(s->entry_point(), code_length); |
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61 MacroAssembler* masm = new MacroAssembler(&cb); |
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62 address start_pc; |
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63 |
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64 #ifndef PRODUCT |
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65 if (CountCompiledCalls) { |
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66 __ load_const(R11_scratch1, SharedRuntime::nof_megamorphic_calls_addr()); |
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67 __ lwz(R12_scratch2, 0, R11_scratch1); |
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68 __ addi(R12_scratch2, R12_scratch2, 1); |
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69 __ stw(R12_scratch2, 0, R11_scratch1); |
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70 } |
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71 #endif |
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72 |
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73 assert(VtableStub::receiver_location() == R3_ARG1->as_VMReg(), "receiver expected in R3_ARG1"); |
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74 |
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75 // Get receiver klass. |
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76 const Register rcvr_klass = R11_scratch1; |
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77 |
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78 // We might implicit NULL fault here. |
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79 address npe_addr = __ pc(); // npe = null pointer exception |
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80 __ load_klass_with_trap_null_check(rcvr_klass, R3); |
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81 |
17807 | 82 // Set method (in case of interpreted method), and destination address. |
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83 int entry_offset = InstanceKlass::vtable_start_offset() + vtable_index*vtableEntry::size(); |
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84 |
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85 #ifndef PRODUCT |
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86 if (DebugVtables) { |
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87 Label L; |
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88 // Check offset vs vtable length. |
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89 const Register vtable_len = R12_scratch2; |
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90 __ lwz(vtable_len, InstanceKlass::vtable_length_offset()*wordSize, rcvr_klass); |
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91 __ cmpwi(CCR0, vtable_len, vtable_index*vtableEntry::size()); |
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92 __ bge(CCR0, L); |
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93 __ li(R12_scratch2, vtable_index); |
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94 __ call_VM(noreg, CAST_FROM_FN_PTR(address, bad_compiled_vtable_index), R3_ARG1, R12_scratch2, false); |
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95 __ bind(L); |
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96 } |
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97 #endif |
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98 |
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99 int v_off = entry_offset*wordSize + vtableEntry::method_offset_in_bytes(); |
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100 |
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101 __ ld(R19_method, v_off, rcvr_klass); |
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102 |
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103 #ifndef PRODUCT |
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104 if (DebugVtables) { |
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105 Label L; |
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106 __ cmpdi(CCR0, R19_method, 0); |
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107 __ bne(CCR0, L); |
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108 __ stop("Vtable entry is ZERO", 102); |
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109 __ bind(L); |
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110 } |
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111 #endif |
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112 |
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113 // If the vtable entry is null, the method is abstract. |
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114 address ame_addr = __ pc(); // ame = abstract method error |
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115 |
14445 | 116 __ load_with_trap_null_check(R12_scratch2, in_bytes(Method::from_compiled_offset()), R19_method); |
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117 __ mtctr(R12_scratch2); |
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118 __ bctr(); |
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119 masm->flush(); |
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120 |
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121 guarantee(__ pc() <= s->code_end(), "overflowed buffer"); |
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122 |
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123 s->set_exception_points(npe_addr, ame_addr); |
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124 |
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125 return s; |
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126 } |
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127 |
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128 VtableStub* VtableStubs::create_itable_stub(int vtable_index) { |
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129 // PPC port: use fixed size. |
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130 const int code_length = VtableStub::pd_code_size_limit(false); |
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131 VtableStub* s = new (code_length) VtableStub(false, vtable_index); |
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132 ResourceMark rm; |
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133 CodeBuffer cb(s->entry_point(), code_length); |
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134 MacroAssembler* masm = new MacroAssembler(&cb); |
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135 address start_pc; |
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136 |
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137 #ifndef PRODUCT |
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138 if (CountCompiledCalls) { |
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139 __ load_const(R11_scratch1, SharedRuntime::nof_megamorphic_calls_addr()); |
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140 __ lwz(R12_scratch2, 0, R11_scratch1); |
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141 __ addi(R12_scratch2, R12_scratch2, 1); |
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142 __ stw(R12_scratch2, 0, R11_scratch1); |
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143 } |
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144 #endif |
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145 |
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146 assert(VtableStub::receiver_location() == R3_ARG1->as_VMReg(), "receiver expected in R3_ARG1"); |
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147 |
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148 // Entry arguments: |
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149 // R19_method: Interface |
14445 | 150 // R3_ARG1: Receiver |
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151 // |
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152 |
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153 const Register rcvr_klass = R11_scratch1; |
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154 const Register vtable_len = R12_scratch2; |
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155 const Register itable_entry_addr = R21_tmp1; |
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156 const Register itable_interface = R22_tmp2; |
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157 |
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158 // Get receiver klass. |
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159 |
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160 // We might implicit NULL fault here. |
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161 address npe_addr = __ pc(); // npe = null pointer exception |
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162 __ load_klass_with_trap_null_check(rcvr_klass, R3_ARG1); |
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163 |
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164 BLOCK_COMMENT("Load start of itable entries into itable_entry."); |
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165 __ lwz(vtable_len, InstanceKlass::vtable_length_offset() * wordSize, rcvr_klass); |
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166 __ slwi(vtable_len, vtable_len, exact_log2(vtableEntry::size() * wordSize)); |
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167 __ add(itable_entry_addr, vtable_len, rcvr_klass); |
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168 |
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169 // Loop over all itable entries until desired interfaceOop(Rinterface) found. |
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170 BLOCK_COMMENT("Increment itable_entry_addr in loop."); |
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171 const int vtable_base_offset = InstanceKlass::vtable_start_offset() * wordSize; |
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172 __ addi(itable_entry_addr, itable_entry_addr, vtable_base_offset + itableOffsetEntry::interface_offset_in_bytes()); |
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173 |
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174 const int itable_offset_search_inc = itableOffsetEntry::size() * wordSize; |
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175 Label search; |
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176 __ bind(search); |
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177 __ ld(itable_interface, 0, itable_entry_addr); |
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178 |
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179 // Handle IncompatibleClassChangeError in itable stubs. |
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180 // If the entry is NULL then we've reached the end of the table |
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181 // without finding the expected interface, so throw an exception. |
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182 BLOCK_COMMENT("Handle IncompatibleClassChangeError in itable stubs."); |
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183 Label throw_icce; |
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184 __ cmpdi(CCR1, itable_interface, 0); |
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185 __ cmpd(CCR0, itable_interface, R19_method); |
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186 __ addi(itable_entry_addr, itable_entry_addr, itable_offset_search_inc); |
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187 __ beq(CCR1, throw_icce); |
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188 __ bne(CCR0, search); |
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189 |
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190 // Entry found and itable_entry_addr points to it, get offset of vtable for interface. |
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191 |
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192 const Register vtable_offset = R12_scratch2; |
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193 const Register itable_method = R11_scratch1; |
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194 |
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195 const int vtable_offset_offset = (itableOffsetEntry::offset_offset_in_bytes() - |
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196 itableOffsetEntry::interface_offset_in_bytes()) - |
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197 itable_offset_search_inc; |
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198 __ lwz(vtable_offset, vtable_offset_offset, itable_entry_addr); |
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199 |
17807 | 200 // Compute itableMethodEntry and get method and entry point for compiler. |
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201 const int method_offset = (itableMethodEntry::size() * wordSize * vtable_index) + |
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202 itableMethodEntry::method_offset_in_bytes(); |
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203 |
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204 __ add(itable_method, rcvr_klass, vtable_offset); |
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205 __ ld(R19_method, method_offset, itable_method); |
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206 |
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207 #ifndef PRODUCT |
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208 if (DebugVtables) { |
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209 Label ok; |
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210 __ cmpd(CCR0, R19_method, 0); |
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211 __ bne(CCR0, ok); |
17807 | 212 __ stop("method is null", 103); |
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213 __ bind(ok); |
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214 } |
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215 #endif |
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216 |
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217 // If the vtable entry is null, the method is abstract. |
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218 address ame_addr = __ pc(); // ame = abstract method error |
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219 |
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220 // Must do an explicit check if implicit checks are disabled. |
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221 assert(!MacroAssembler::needs_explicit_null_check(in_bytes(Method::from_compiled_offset())), "sanity"); |
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222 if (!ImplicitNullChecks || !os::zero_page_read_protected()) { |
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223 if (TrapBasedNullChecks) { |
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224 __ trap_null_check(R19_method); |
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225 } else { |
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226 __ cmpdi(CCR0, R19_method, 0); |
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227 __ beq(CCR0, throw_icce); |
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228 } |
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229 } |
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230 __ ld(R12_scratch2, in_bytes(Method::from_compiled_offset()), R19_method); |
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231 __ mtctr(R12_scratch2); |
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232 __ bctr(); |
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233 |
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234 // Handle IncompatibleClassChangeError in itable stubs. |
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235 // More detailed error message. |
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236 // We force resolving of the call site by jumping to the "handle |
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237 // wrong method" stub, and so let the interpreter runtime do all the |
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238 // dirty work. |
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239 __ bind(throw_icce); |
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240 __ load_const(R11_scratch1, SharedRuntime::get_handle_wrong_method_stub()); |
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241 __ mtctr(R11_scratch1); |
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242 __ bctr(); |
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243 |
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244 masm->flush(); |
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245 |
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246 guarantee(__ pc() <= s->code_end(), "overflowed buffer"); |
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247 |
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248 s->set_exception_points(npe_addr, ame_addr); |
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249 return s; |
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250 } |
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251 |
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252 int VtableStub::pd_code_size_limit(bool is_vtable_stub) { |
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253 if (TraceJumps || DebugVtables || CountCompiledCalls || VerifyOops) { |
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254 return 1000; |
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255 } else { |
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256 int decode_klass_size = MacroAssembler::instr_size_for_decode_klass_not_null(); |
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257 if (is_vtable_stub) { |
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258 return 20 + decode_klass_size + 8 + 8; // Plain + cOops + Traps + safety |
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259 } else { |
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260 return 96 + decode_klass_size + 12 + 8; // Plain + cOops + Traps + safety |
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261 } |
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262 } |
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263 } |
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264 |
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265 int VtableStub::pd_code_alignment() { |
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266 const unsigned int icache_line_size = 32; |
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267 return icache_line_size; |
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268 } |