Mercurial > hg > truffle
annotate src/cpu/ppc/vm/nativeInst_ppc.cpp @ 18357:09550eb6ddfb
replace use of '==' with .equals()
author | Doug Simon <doug.simon@oracle.com> |
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date | Wed, 12 Nov 2014 15:33:20 +0100 |
parents | b858620b0081 |
children | 327e7269f90d |
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. |
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3 * Copyright 2012, 2013 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/macroAssembler.inline.hpp" |
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28 #include "memory/resourceArea.hpp" |
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29 #include "nativeInst_ppc.hpp" |
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30 #include "oops/oop.inline.hpp" |
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31 #include "runtime/handles.hpp" |
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32 #include "runtime/sharedRuntime.hpp" |
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33 #include "runtime/stubRoutines.hpp" |
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34 #include "utilities/ostream.hpp" |
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35 #ifdef COMPILER1 |
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36 #include "c1/c1_Runtime1.hpp" |
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37 #endif |
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38 |
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39 // We use an illtrap for marking a method as not_entrant or zombie iff !UseSIGTRAP |
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40 // Work around a C++ compiler bug which changes 'this' |
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41 bool NativeInstruction::is_sigill_zombie_not_entrant_at(address addr) { |
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42 assert(!UseSIGTRAP, "precondition"); |
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43 if (*(int*)addr != 0 /*illtrap*/) return false; |
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44 CodeBlob* cb = CodeCache::find_blob_unsafe(addr); |
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45 if (cb == NULL || !cb->is_nmethod()) return false; |
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46 nmethod *nm = (nmethod *)cb; |
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47 // This method is not_entrant or zombie iff the illtrap instruction is |
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48 // located at the verified entry point. |
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49 return nm->verified_entry_point() == addr; |
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50 } |
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51 |
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52 #ifdef ASSERT |
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53 void NativeInstruction::verify() { |
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54 // Make sure code pattern is actually an instruction address. |
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55 address addr = addr_at(0); |
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56 if (addr == 0 || ((intptr_t)addr & 3) != 0) { |
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57 fatal("not an instruction address"); |
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58 } |
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59 } |
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60 #endif // ASSERT |
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61 |
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62 // Extract call destination from a NativeCall. The call might use a trampoline stub. |
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63 address NativeCall::destination() const { |
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64 address addr = (address)this; |
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65 address destination = Assembler::bxx_destination(addr); |
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66 |
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67 // Do we use a trampoline stub for this call? |
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68 CodeBlob* cb = CodeCache::find_blob_unsafe(addr); // Else we get assertion if nmethod is zombie. |
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69 assert(cb && cb->is_nmethod(), "sanity"); |
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70 nmethod *nm = (nmethod *)cb; |
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71 if (nm->stub_contains(destination) && is_NativeCallTrampolineStub_at(destination)) { |
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72 // Yes we do, so get the destination from the trampoline stub. |
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73 const address trampoline_stub_addr = destination; |
14451 | 74 destination = NativeCallTrampolineStub_at(trampoline_stub_addr)->destination(nm); |
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75 } |
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76 |
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77 return destination; |
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78 } |
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79 |
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80 // Similar to replace_mt_safe, but just changes the destination. The |
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81 // important thing is that free-running threads are able to execute this |
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82 // call instruction at all times. Thus, the displacement field must be |
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83 // instruction-word-aligned. |
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84 // |
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85 // Used in the runtime linkage of calls; see class CompiledIC. |
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86 // |
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87 // Add parameter assert_lock to switch off assertion |
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88 // during code generation, where no patching lock is needed. |
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89 void NativeCall::set_destination_mt_safe(address dest, bool assert_lock) { |
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90 assert(!assert_lock || |
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91 (Patching_lock->is_locked() || SafepointSynchronize::is_at_safepoint()), |
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92 "concurrent code patching"); |
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93 |
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94 ResourceMark rm; |
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95 int code_size = 1 * BytesPerInstWord; |
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96 address addr_call = addr_at(0); |
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97 assert(MacroAssembler::is_bl(*(int*)addr_call), "unexpected code at call-site"); |
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98 |
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99 CodeBuffer cb(addr_call, code_size + 1); |
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100 MacroAssembler* a = new MacroAssembler(&cb); |
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101 |
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102 // Patch the call. |
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103 if (ReoptimizeCallSequences && |
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104 a->is_within_range_of_b(dest, addr_call)) { |
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105 a->bl(dest); |
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106 } else { |
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107 address trampoline_stub_addr = get_trampoline(); |
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108 |
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109 // We did not find a trampoline stub because the current codeblob |
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110 // does not provide this information. The branch will be patched |
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111 // later during a final fixup, when all necessary information is |
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112 // available. |
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113 if (trampoline_stub_addr == 0) |
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114 return; |
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115 |
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116 // Patch the constant in the call's trampoline stub. |
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117 NativeCallTrampolineStub_at(trampoline_stub_addr)->set_destination(dest); |
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118 |
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119 a->bl(trampoline_stub_addr); |
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120 } |
14445 | 121 ICache::ppc64_flush_icache_bytes(addr_call, code_size); |
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122 } |
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123 |
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124 address NativeCall::get_trampoline() { |
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125 address call_addr = addr_at(0); |
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126 |
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127 CodeBlob *code = CodeCache::find_blob(call_addr); |
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128 assert(code != NULL, "Could not find the containing code blob"); |
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129 |
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130 // There are no relocations available when the code gets relocated |
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131 // because of CodeBuffer expansion. |
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132 if (code->relocation_size() == 0) |
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133 return NULL; |
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134 |
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135 address bl_destination = Assembler::bxx_destination(call_addr); |
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136 if (code->content_contains(bl_destination) && |
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137 is_NativeCallTrampolineStub_at(bl_destination)) |
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138 return bl_destination; |
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139 |
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140 // If the codeBlob is not a nmethod, this is because we get here from the |
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141 // CodeBlob constructor, which is called within the nmethod constructor. |
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142 return trampoline_stub_Relocation::get_trampoline_for(call_addr, (nmethod*)code); |
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143 } |
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144 |
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145 #ifdef ASSERT |
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146 void NativeCall::verify() { |
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147 address addr = addr_at(0); |
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148 |
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149 if (!NativeCall::is_call_at(addr)) { |
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150 tty->print_cr("not a NativeCall at " PTR_FORMAT, addr); |
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151 // TODO: PPC port: Disassembler::decode(addr - 20, addr + 20, tty); |
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152 fatal(err_msg("not a NativeCall at " PTR_FORMAT, addr)); |
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153 } |
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154 } |
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155 #endif // ASSERT |
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156 |
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157 #ifdef ASSERT |
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158 void NativeFarCall::verify() { |
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159 address addr = addr_at(0); |
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160 |
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161 NativeInstruction::verify(); |
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162 if (!NativeFarCall::is_far_call_at(addr)) { |
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163 tty->print_cr("not a NativeFarCall at " PTR_FORMAT, addr); |
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164 // TODO: PPC port: Disassembler::decode(addr, 20, 20, tty); |
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165 fatal(err_msg("not a NativeFarCall at " PTR_FORMAT, addr)); |
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166 } |
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167 } |
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168 #endif // ASSERT |
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169 |
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170 address NativeMovConstReg::next_instruction_address() const { |
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171 #ifdef ASSERT |
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172 CodeBlob* nm = CodeCache::find_blob(instruction_address()); |
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173 assert(!MacroAssembler::is_set_narrow_oop(addr_at(0), nm->content_begin()), "Should not patch narrow oop here"); |
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174 #endif |
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175 |
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176 if (MacroAssembler::is_load_const_from_method_toc_at(addr_at(0))) { |
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177 return addr_at(load_const_from_method_toc_instruction_size); |
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178 } else { |
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179 return addr_at(load_const_instruction_size); |
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180 } |
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181 } |
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182 |
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183 intptr_t NativeMovConstReg::data() const { |
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184 address addr = addr_at(0); |
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185 |
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186 if (MacroAssembler::is_load_const_at(addr)) { |
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187 return MacroAssembler::get_const(addr); |
14445 | 188 } |
189 | |
190 CodeBlob* cb = CodeCache::find_blob_unsafe(addr); | |
191 if (MacroAssembler::is_set_narrow_oop(addr, cb->content_begin())) { | |
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192 narrowOop no = (narrowOop)MacroAssembler::get_narrow_oop(addr, cb->content_begin()); |
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193 return cast_from_oop<intptr_t>(oopDesc::decode_heap_oop(no)); |
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194 } else { |
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195 assert(MacroAssembler::is_load_const_from_method_toc_at(addr), "must be load_const_from_pool"); |
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196 |
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197 address ctable = cb->content_begin(); |
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198 int offset = MacroAssembler::get_offset_of_load_const_from_method_toc_at(addr); |
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199 return *(intptr_t *)(ctable + offset); |
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200 } |
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201 } |
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202 |
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203 address NativeMovConstReg::set_data_plain(intptr_t data, CodeBlob *cb) { |
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204 address addr = instruction_address(); |
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205 address next_address = NULL; |
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206 if (!cb) cb = CodeCache::find_blob(addr); |
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207 |
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208 if (cb != NULL && MacroAssembler::is_load_const_from_method_toc_at(addr)) { |
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209 // A load from the method's TOC (ctable). |
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210 assert(cb->is_nmethod(), "must be nmethod"); |
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211 const address ctable = cb->content_begin(); |
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212 const int toc_offset = MacroAssembler::get_offset_of_load_const_from_method_toc_at(addr); |
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213 *(intptr_t *)(ctable + toc_offset) = data; |
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214 next_address = addr + BytesPerInstWord; |
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215 } else if (cb != NULL && |
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216 MacroAssembler::is_calculate_address_from_global_toc_at(addr, cb->content_begin())) { |
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217 // A calculation relative to the global TOC. |
14445 | 218 if (MacroAssembler::get_address_of_calculate_address_from_global_toc_at(addr, cb->content_begin()) != |
219 (address)data) { | |
220 const int invalidated_range = | |
221 MacroAssembler::patch_calculate_address_from_global_toc_at(addr, cb->content_begin(), | |
222 (address)data); | |
223 const address start = invalidated_range < 0 ? addr + invalidated_range : addr; | |
224 // FIXME: | |
225 const int range = invalidated_range < 0 ? 4 - invalidated_range : 8; | |
226 ICache::ppc64_flush_icache_bytes(start, range); | |
227 } | |
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228 next_address = addr + 1 * BytesPerInstWord; |
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229 } else if (MacroAssembler::is_load_const_at(addr)) { |
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230 // A normal 5 instruction load_const code sequence. |
14445 | 231 if (MacroAssembler::get_const(addr) != (long)data) { |
232 // This is not mt safe, ok in methods like CodeBuffer::copy_code(). | |
233 MacroAssembler::patch_const(addr, (long)data); | |
234 ICache::ppc64_flush_icache_bytes(addr, load_const_instruction_size); | |
235 } | |
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236 next_address = addr + 5 * BytesPerInstWord; |
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237 } else if (MacroAssembler::is_bl(* (int*) addr)) { |
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238 // A single branch-and-link instruction. |
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239 ResourceMark rm; |
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240 const int code_size = 1 * BytesPerInstWord; |
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241 CodeBuffer cb(addr, code_size + 1); |
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242 MacroAssembler* a = new MacroAssembler(&cb); |
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243 a->bl((address) data); |
14445 | 244 ICache::ppc64_flush_icache_bytes(addr, code_size); |
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245 next_address = addr + code_size; |
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246 } else { |
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247 ShouldNotReachHere(); |
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248 } |
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249 |
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250 return next_address; |
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251 } |
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252 |
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253 void NativeMovConstReg::set_data(intptr_t data) { |
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254 // Store the value into the instruction stream. |
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255 CodeBlob *cb = CodeCache::find_blob(instruction_address()); |
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256 address next_address = set_data_plain(data, cb); |
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257 |
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258 // Also store the value into an oop_Relocation cell, if any. |
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259 if (cb && cb->is_nmethod()) { |
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260 RelocIterator iter((nmethod *) cb, instruction_address(), next_address); |
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261 oop* oop_addr = NULL; |
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262 Metadata** metadata_addr = NULL; |
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263 while (iter.next()) { |
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264 if (iter.type() == relocInfo::oop_type) { |
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265 oop_Relocation *r = iter.oop_reloc(); |
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266 if (oop_addr == NULL) { |
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267 oop_addr = r->oop_addr(); |
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268 *oop_addr = cast_to_oop(data); |
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269 } else { |
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270 assert(oop_addr == r->oop_addr(), "must be only one set-oop here") ; |
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271 } |
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272 } |
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273 if (iter.type() == relocInfo::metadata_type) { |
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274 metadata_Relocation *r = iter.metadata_reloc(); |
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275 if (metadata_addr == NULL) { |
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276 metadata_addr = r->metadata_addr(); |
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277 *metadata_addr = (Metadata*)data; |
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278 } else { |
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279 assert(metadata_addr == r->metadata_addr(), "must be only one set-metadata here"); |
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280 } |
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281 } |
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282 } |
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283 } |
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284 } |
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285 |
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286 void NativeMovConstReg::set_narrow_oop(narrowOop data, CodeBlob *code /* = NULL */) { |
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287 address addr = addr_at(0); |
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288 CodeBlob* cb = (code) ? code : CodeCache::find_blob(instruction_address()); |
14445 | 289 if (MacroAssembler::get_narrow_oop(addr, cb->content_begin()) == (long)data) return; |
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290 const int invalidated_range = |
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291 MacroAssembler::patch_set_narrow_oop(addr, cb->content_begin(), (long)data); |
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292 const address start = invalidated_range < 0 ? addr + invalidated_range : addr; |
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293 // FIXME: |
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294 const int range = invalidated_range < 0 ? 4 - invalidated_range : 8; |
14445 | 295 ICache::ppc64_flush_icache_bytes(start, range); |
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296 } |
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297 |
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298 // Do not use an assertion here. Let clients decide whether they only |
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299 // want this when assertions are enabled. |
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300 #ifdef ASSERT |
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301 void NativeMovConstReg::verify() { |
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302 address addr = addr_at(0); |
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303 if (! MacroAssembler::is_load_const_at(addr) && |
14445 | 304 ! MacroAssembler::is_load_const_from_method_toc_at(addr)) { |
305 CodeBlob* cb = CodeCache::find_blob_unsafe(addr); // find_nmethod() asserts if nmethod is zombie. | |
306 if (! (cb != NULL && MacroAssembler::is_calculate_address_from_global_toc_at(addr, cb->content_begin())) && | |
307 ! (cb != NULL && MacroAssembler::is_set_narrow_oop(addr, cb->content_begin())) && | |
308 ! MacroAssembler::is_bl(*((int*) addr))) { | |
309 tty->print_cr("not a NativeMovConstReg at " PTR_FORMAT, addr); | |
310 // TODO: PPC port: Disassembler::decode(addr, 20, 20, tty); | |
311 fatal(err_msg("not a NativeMovConstReg at " PTR_FORMAT, addr)); | |
312 } | |
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313 } |
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314 } |
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315 #endif // ASSERT |
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316 |
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317 void NativeJump::patch_verified_entry(address entry, address verified_entry, address dest) { |
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318 ResourceMark rm; |
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319 int code_size = 1 * BytesPerInstWord; |
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320 CodeBuffer cb(verified_entry, code_size + 1); |
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321 MacroAssembler* a = new MacroAssembler(&cb); |
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322 #ifdef COMPILER2 |
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323 assert(dest == SharedRuntime::get_handle_wrong_method_stub(), "expected fixed destination of patch"); |
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324 #endif |
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325 // Patch this nmethod atomically. Always use illtrap/trap in debug build. |
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326 if (DEBUG_ONLY(false &&) a->is_within_range_of_b(dest, a->pc())) { |
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327 a->b(dest); |
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328 } else { |
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329 // The signal handler will continue at dest=OptoRuntime::handle_wrong_method_stub(). |
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330 if (TrapBasedNotEntrantChecks) { |
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331 // We use a special trap for marking a method as not_entrant or zombie. |
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332 a->trap_zombie_not_entrant(); |
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333 } else { |
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334 // We use an illtrap for marking a method as not_entrant or zombie. |
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335 a->illtrap(); |
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336 } |
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337 } |
14445 | 338 ICache::ppc64_flush_icache_bytes(verified_entry, code_size); |
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339 } |
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340 |
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341 #ifdef ASSERT |
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342 void NativeJump::verify() { |
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343 address addr = addr_at(0); |
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344 |
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345 NativeInstruction::verify(); |
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346 if (!NativeJump::is_jump_at(addr)) { |
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347 tty->print_cr("not a NativeJump at " PTR_FORMAT, addr); |
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348 // TODO: PPC port: Disassembler::decode(addr, 20, 20, tty); |
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349 fatal(err_msg("not a NativeJump at " PTR_FORMAT, addr)); |
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350 } |
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351 } |
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352 #endif // ASSERT |
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353 |
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354 //------------------------------------------------------------------- |
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355 |
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356 // Call trampoline stubs. |
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357 // |
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358 // Layout and instructions of a call trampoline stub: |
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359 // 0: load the TOC (part 1) |
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360 // 4: load the TOC (part 2) |
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361 // 8: load the call target from the constant pool (part 1) |
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362 // [12: load the call target from the constant pool (part 2, optional)] |
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363 // ..: branch via CTR |
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364 // |
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365 |
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366 address NativeCallTrampolineStub::encoded_destination_addr() const { |
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367 address instruction_addr = addr_at(2 * BytesPerInstWord); |
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368 assert(MacroAssembler::is_ld_largeoffset(instruction_addr), |
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369 "must be a ld with large offset (from the constant pool)"); |
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370 |
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371 return instruction_addr; |
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372 } |
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373 |
14451 | 374 address NativeCallTrampolineStub::destination(nmethod *nm) const { |
375 CodeBlob* cb = nm ? nm : CodeCache::find_blob_unsafe(addr_at(0)); | |
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376 address ctable = cb->content_begin(); |
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377 |
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378 return *(address*)(ctable + destination_toc_offset()); |
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379 } |
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380 |
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381 int NativeCallTrampolineStub::destination_toc_offset() const { |
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382 return MacroAssembler::get_ld_largeoffset_offset(encoded_destination_addr()); |
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383 } |
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384 |
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385 void NativeCallTrampolineStub::set_destination(address new_destination) { |
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386 CodeBlob* cb = CodeCache::find_blob(addr_at(0)); |
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387 address ctable = cb->content_begin(); |
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388 |
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389 *(address*)(ctable + destination_toc_offset()) = new_destination; |
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390 } |
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391 |