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1692
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1 /*
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1972
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2 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
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1692
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3 * Copyright 2008, 2009 Red Hat, Inc.
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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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1972
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26 #include "precompiled.hpp"
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27 #include "ci/ciMethod.hpp"
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28 #include "code/debugInfoRec.hpp"
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29 #include "shark/llvmValue.hpp"
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30 #include "shark/sharkBuilder.hpp"
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31 #include "shark/sharkCacheDecache.hpp"
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32 #include "shark/sharkFunction.hpp"
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33 #include "shark/sharkState.hpp"
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1692
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34
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35 using namespace llvm;
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36
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37 void SharkDecacher::start_frame() {
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38 // Start recording the debug information
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39 _pc_offset = code_buffer()->create_unique_offset();
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40 _oopmap = new OopMap(
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41 oopmap_slot_munge(stack()->oopmap_frame_size()),
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42 oopmap_slot_munge(arg_size()));
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43 debug_info()->add_safepoint(pc_offset(), oopmap());
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44 }
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45
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46 void SharkDecacher::start_stack(int stack_depth) {
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47 // Create the array we'll record our stack slots in
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48 _exparray = new GrowableArray<ScopeValue*>(stack_depth);
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49
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50 // Set the stack pointer
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51 stack()->CreateStoreStackPointer(
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52 builder()->CreatePtrToInt(
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53 stack()->slot_addr(
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54 stack()->stack_slots_offset() + max_stack() - stack_depth),
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55 SharkType::intptr_type()));
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56 }
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57
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58 void SharkDecacher::process_stack_slot(int index,
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59 SharkValue** addr,
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60 int offset) {
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61 SharkValue *value = *addr;
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62
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63 // Write the value to the frame if necessary
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64 if (stack_slot_needs_write(index, value)) {
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65 write_value_to_frame(
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66 SharkType::to_stackType(value->basic_type()),
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67 value->generic_value(),
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68 adjusted_offset(value, offset));
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69 }
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70
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71 // Record the value in the oopmap if necessary
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72 if (stack_slot_needs_oopmap(index, value)) {
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73 oopmap()->set_oop(slot2reg(offset));
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74 }
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75
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76 // Record the value in the debuginfo if necessary
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77 if (stack_slot_needs_debuginfo(index, value)) {
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78 exparray()->append(slot2lv(offset, stack_location_type(index, addr)));
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79 }
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80 }
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81
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82 void SharkDecacher::start_monitors(int num_monitors) {
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83 // Create the array we'll record our monitors in
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84 _monarray = new GrowableArray<MonitorValue*>(num_monitors);
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85 }
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86
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87 void SharkDecacher::process_monitor(int index, int box_offset, int obj_offset) {
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88 oopmap()->set_oop(slot2reg(obj_offset));
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89
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90 monarray()->append(new MonitorValue(
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91 slot2lv (obj_offset, Location::oop),
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92 slot2loc(box_offset, Location::normal)));
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93 }
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94
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95 void SharkDecacher::process_oop_tmp_slot(Value** value, int offset) {
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96 // Decache the temporary oop slot
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97 if (*value) {
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98 write_value_to_frame(
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99 SharkType::oop_type(),
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100 *value,
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101 offset);
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102
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103 oopmap()->set_oop(slot2reg(offset));
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104 }
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105 }
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106
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107 void SharkDecacher::process_method_slot(Value** value, int offset) {
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108 // Decache the method pointer
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109 write_value_to_frame(
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110 SharkType::methodOop_type(),
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111 *value,
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112 offset);
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113
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114 oopmap()->set_oop(slot2reg(offset));
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115 }
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116
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117 void SharkDecacher::process_pc_slot(int offset) {
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118 // Record the PC
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119 builder()->CreateStore(
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120 builder()->code_buffer_address(pc_offset()),
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121 stack()->slot_addr(offset));
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122 }
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123
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124 void SharkDecacher::start_locals() {
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125 // Create the array we'll record our local variables in
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126 _locarray = new GrowableArray<ScopeValue*>(max_locals());}
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127
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128 void SharkDecacher::process_local_slot(int index,
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129 SharkValue** addr,
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130 int offset) {
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131 SharkValue *value = *addr;
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132
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133 // Write the value to the frame if necessary
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134 if (local_slot_needs_write(index, value)) {
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135 write_value_to_frame(
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136 SharkType::to_stackType(value->basic_type()),
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137 value->generic_value(),
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138 adjusted_offset(value, offset));
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139 }
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140
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141 // Record the value in the oopmap if necessary
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142 if (local_slot_needs_oopmap(index, value)) {
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143 oopmap()->set_oop(slot2reg(offset));
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144 }
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145
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146 // Record the value in the debuginfo if necessary
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147 if (local_slot_needs_debuginfo(index, value)) {
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148 locarray()->append(slot2lv(offset, local_location_type(index, addr)));
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149 }
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150 }
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151
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152 void SharkDecacher::end_frame() {
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153 // Record the scope
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154 debug_info()->describe_scope(
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155 pc_offset(),
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156 target(),
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157 bci(),
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158 true,
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159 false,
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160 false,
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161 debug_info()->create_scope_values(locarray()),
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162 debug_info()->create_scope_values(exparray()),
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163 debug_info()->create_monitor_values(monarray()));
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164
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165 // Finish recording the debug information
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166 debug_info()->end_safepoint(pc_offset());
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167 }
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168
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169 void SharkCacher::process_stack_slot(int index,
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170 SharkValue** addr,
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171 int offset) {
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172 SharkValue *value = *addr;
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173
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174 // Read the value from the frame if necessary
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175 if (stack_slot_needs_read(index, value)) {
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176 *addr = SharkValue::create_generic(
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177 value->type(),
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178 read_value_from_frame(
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179 SharkType::to_stackType(value->basic_type()),
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180 adjusted_offset(value, offset)),
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181 value->zero_checked());
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182 }
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183 }
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184
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185 void SharkOSREntryCacher::process_monitor(int index,
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186 int box_offset,
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187 int obj_offset) {
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188 // Copy the monitor from the OSR buffer to the frame
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189 int src_offset = max_locals() + index * 2;
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190 builder()->CreateStore(
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191 builder()->CreateLoad(
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192 CreateAddressOfOSRBufEntry(src_offset, SharkType::intptr_type())),
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193 stack()->slot_addr(box_offset, SharkType::intptr_type()));
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194 builder()->CreateStore(
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195 builder()->CreateLoad(
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196 CreateAddressOfOSRBufEntry(src_offset + 1, SharkType::oop_type())),
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197 stack()->slot_addr(obj_offset, SharkType::oop_type()));
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198 }
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199
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200 void SharkCacher::process_oop_tmp_slot(Value** value, int offset) {
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201 // Cache the temporary oop
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202 if (*value)
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203 *value = read_value_from_frame(SharkType::oop_type(), offset);
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204 }
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205
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206 void SharkCacher::process_method_slot(Value** value, int offset) {
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207 // Cache the method pointer
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208 *value = read_value_from_frame(SharkType::methodOop_type(), offset);
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209 }
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210
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211 void SharkFunctionEntryCacher::process_method_slot(Value** value, int offset) {
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212 // "Cache" the method pointer
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213 *value = method();
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214 }
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215
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216 void SharkCacher::process_local_slot(int index,
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217 SharkValue** addr,
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218 int offset) {
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219 SharkValue *value = *addr;
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220
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221 // Read the value from the frame if necessary
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222 if (local_slot_needs_read(index, value)) {
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223 *addr = SharkValue::create_generic(
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224 value->type(),
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225 read_value_from_frame(
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226 SharkType::to_stackType(value->basic_type()),
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227 adjusted_offset(value, offset)),
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228 value->zero_checked());
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229 }
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230 }
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231
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232 Value* SharkOSREntryCacher::CreateAddressOfOSRBufEntry(int offset,
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233 const Type* type) {
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234 Value *result = builder()->CreateStructGEP(osr_buf(), offset);
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235 if (type != SharkType::intptr_type())
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236 result = builder()->CreateBitCast(result, PointerType::getUnqual(type));
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237 return result;
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238 }
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239
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240 void SharkOSREntryCacher::process_local_slot(int index,
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241 SharkValue** addr,
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242 int offset) {
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243 SharkValue *value = *addr;
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244
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245 // Read the value from the OSR buffer if necessary
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246 if (local_slot_needs_read(index, value)) {
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247 *addr = SharkValue::create_generic(
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248 value->type(),
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249 builder()->CreateLoad(
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250 CreateAddressOfOSRBufEntry(
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251 adjusted_offset(value, max_locals() - 1 - index),
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252 SharkType::to_stackType(value->basic_type()))),
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253 value->zero_checked());
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254 }
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255 }
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256
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257 void SharkDecacher::write_value_to_frame(const Type* type,
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258 Value* value,
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259 int offset) {
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260 builder()->CreateStore(value, stack()->slot_addr(offset, type));
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261 }
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262
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263 Value* SharkCacher::read_value_from_frame(const Type* type, int offset) {
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264 return builder()->CreateLoad(stack()->slot_addr(offset, type));
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265 }
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