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1 /*
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2 * Copyright 2003-2007 Sun Microsystems, Inc. All Rights Reserved.
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3 * Copyright 2007, 2008, 2009, 2010 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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21 * CA 95054 USA or visit www.sun.com if you need additional information or
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22 * have any questions.
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23 *
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24 */
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25
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26 #include "incls/_precompiled.incl"
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27 #include "incls/_frame_zero.cpp.incl"
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28
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29 #ifdef ASSERT
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30 void RegisterMap::check_location_valid() {
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31 ShouldNotCallThis();
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32 }
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33 #endif
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34
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35 bool frame::is_interpreted_frame() const {
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36 return zeroframe()->is_interpreter_frame();
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37 }
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38
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39 bool frame::is_fake_stub_frame() const {
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40 return zeroframe()->is_fake_stub_frame();
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41 }
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42
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43 frame frame::sender_for_entry_frame(RegisterMap *map) const {
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44 assert(zeroframe()->is_entry_frame(), "wrong type of frame");
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45 assert(map != NULL, "map must be set");
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46 assert(!entry_frame_is_first(), "next Java fp must be non zero");
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47 assert(entry_frame_call_wrapper()->anchor()->last_Java_sp() == sender_sp(),
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48 "sender should be next Java frame");
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49 map->clear();
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50 assert(map->include_argument_oops(), "should be set by clear");
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51 return frame(zeroframe()->next(), sender_sp());
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52 }
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53
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1078
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54 frame frame::sender_for_nonentry_frame(RegisterMap *map) const {
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55 assert(zeroframe()->is_interpreter_frame() ||
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56 zeroframe()->is_shark_frame() ||
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57 zeroframe()->is_fake_stub_frame(), "wrong type of frame");
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58 return frame(zeroframe()->next(), sender_sp());
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59 }
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60
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61 frame frame::sender(RegisterMap* map) const {
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62 // Default is not to follow arguments; the various
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63 // sender_for_xxx methods update this accordingly.
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64 map->set_include_argument_oops(false);
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65
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66 if (is_entry_frame())
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67 return sender_for_entry_frame(map);
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68 else
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69 return sender_for_nonentry_frame(map);
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70 }
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71
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72 #ifdef CC_INTERP
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73 BasicObjectLock* frame::interpreter_frame_monitor_begin() const {
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74 return get_interpreterState()->monitor_base();
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75 }
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76
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77 BasicObjectLock* frame::interpreter_frame_monitor_end() const {
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78 return (BasicObjectLock*) get_interpreterState()->stack_base();
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79 }
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80 #endif // CC_INTERP
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81
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82 void frame::patch_pc(Thread* thread, address pc) {
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83 // We borrow this call to set the thread pointer in the interpreter
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84 // state; the hook to set up deoptimized frames isn't supplied it.
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85 assert(pc == NULL, "should be");
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86 get_interpreterState()->set_thread((JavaThread *) thread);
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87 }
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88
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89 bool frame::safe_for_sender(JavaThread *thread) {
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90 ShouldNotCallThis();
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91 }
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92
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93 void frame::pd_gc_epilog() {
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94 }
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95
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96 bool frame::is_interpreted_frame_valid(JavaThread *thread) const {
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97 ShouldNotCallThis();
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98 }
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99
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100 BasicType frame::interpreter_frame_result(oop* oop_result,
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101 jvalue* value_result) {
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102 assert(is_interpreted_frame(), "interpreted frame expected");
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103 methodOop method = interpreter_frame_method();
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104 BasicType type = method->result_type();
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105 intptr_t* tos_addr = (intptr_t *) interpreter_frame_tos_address();
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106 oop obj;
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107
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108 switch (type) {
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109 case T_VOID:
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110 break;
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111 case T_BOOLEAN:
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112 value_result->z = *(jboolean *) tos_addr;
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113 break;
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114 case T_BYTE:
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115 value_result->b = *(jbyte *) tos_addr;
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116 break;
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117 case T_CHAR:
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118 value_result->c = *(jchar *) tos_addr;
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119 break;
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120 case T_SHORT:
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121 value_result->s = *(jshort *) tos_addr;
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122 break;
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123 case T_INT:
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124 value_result->i = *(jint *) tos_addr;
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125 break;
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126 case T_LONG:
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127 value_result->j = *(jlong *) tos_addr;
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128 break;
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129 case T_FLOAT:
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130 value_result->f = *(jfloat *) tos_addr;
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131 break;
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132 case T_DOUBLE:
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133 value_result->d = *(jdouble *) tos_addr;
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134 break;
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135
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136 case T_OBJECT:
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137 case T_ARRAY:
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138 if (method->is_native()) {
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139 obj = get_interpreterState()->oop_temp();
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140 }
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141 else {
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142 oop* obj_p = (oop *) tos_addr;
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143 obj = (obj_p == NULL) ? (oop) NULL : *obj_p;
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144 }
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145 assert(obj == NULL || Universe::heap()->is_in(obj), "sanity check");
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146 *oop_result = obj;
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147 break;
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148
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149 default:
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150 ShouldNotReachHere();
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151 }
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152
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153 return type;
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154 }
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155
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156 int frame::frame_size(RegisterMap* map) const {
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157 #ifdef PRODUCT
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158 ShouldNotCallThis();
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159 #else
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160 return 0; // make javaVFrame::print_value work
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161 #endif // PRODUCT
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162 }
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163
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164 intptr_t* frame::interpreter_frame_tos_at(jint offset) const {
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165 int index = (Interpreter::expr_offset_in_bytes(offset) / wordSize);
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166 return &interpreter_frame_tos_address()[index];
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167 }
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168
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169 void frame::zero_print_on_error(int frame_index,
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170 outputStream* st,
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171 char* buf,
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172 int buflen) const {
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173 // Divide the buffer between the field and the value
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174 buflen >>= 1;
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175 char *fieldbuf = buf;
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176 char *valuebuf = buf + buflen;
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177
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178 // Print each word of the frame
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179 for (intptr_t *addr = sp(); addr <= fp(); addr++) {
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180 int offset = fp() - addr;
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181
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182 // Fill in default values, then try and improve them
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183 snprintf(fieldbuf, buflen, "word[%d]", offset);
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184 snprintf(valuebuf, buflen, PTR_FORMAT, *addr);
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185 zeroframe()->identify_word(frame_index, offset, fieldbuf, valuebuf, buflen);
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186 fieldbuf[buflen - 1] = '\0';
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187 valuebuf[buflen - 1] = '\0';
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188
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189 // Print the result
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190 st->print_cr(" " PTR_FORMAT ": %-21s = %s", addr, fieldbuf, valuebuf);
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191 }
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192 }
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193
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194 void ZeroFrame::identify_word(int frame_index,
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195 int offset,
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196 char* fieldbuf,
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197 char* valuebuf,
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198 int buflen) const {
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199 switch (offset) {
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200 case next_frame_off:
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201 strncpy(fieldbuf, "next_frame", buflen);
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202 break;
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203
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204 case frame_type_off:
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205 strncpy(fieldbuf, "frame_type", buflen);
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206 if (is_entry_frame())
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207 strncpy(valuebuf, "ENTRY_FRAME", buflen);
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208 else if (is_interpreter_frame())
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209 strncpy(valuebuf, "INTERPRETER_FRAME", buflen);
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210 else if (is_shark_frame())
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211 strncpy(valuebuf, "SHARK_FRAME", buflen);
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212 else if (is_fake_stub_frame())
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213 strncpy(valuebuf, "FAKE_STUB_FRAME", buflen);
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214 break;
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215
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216 default:
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217 if (is_entry_frame()) {
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218 as_entry_frame()->identify_word(
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219 frame_index, offset, fieldbuf, valuebuf, buflen);
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220 }
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221 else if (is_interpreter_frame()) {
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222 as_interpreter_frame()->identify_word(
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223 frame_index, offset, fieldbuf, valuebuf, buflen);
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224 }
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225 else if (is_shark_frame()) {
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226 as_shark_frame()->identify_word(
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227 frame_index, offset, fieldbuf, valuebuf, buflen);
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228 }
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229 else if (is_fake_stub_frame()) {
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230 as_fake_stub_frame()->identify_word(
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231 frame_index, offset, fieldbuf, valuebuf, buflen);
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232 }
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233 }
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234 }
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235
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236 void EntryFrame::identify_word(int frame_index,
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237 int offset,
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238 char* fieldbuf,
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239 char* valuebuf,
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240 int buflen) const {
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241 switch (offset) {
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242 case call_wrapper_off:
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243 strncpy(fieldbuf, "call_wrapper", buflen);
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244 break;
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245
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246 default:
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247 snprintf(fieldbuf, buflen, "local[%d]", offset - 3);
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248 }
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249 }
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250
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251 void InterpreterFrame::identify_word(int frame_index,
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252 int offset,
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253 char* fieldbuf,
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254 char* valuebuf,
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255 int buflen) const {
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256 interpreterState istate = interpreter_state();
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257 bool is_valid = istate->self_link() == istate;
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258 intptr_t *addr = addr_of_word(offset);
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259
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260 // Fixed part
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261 if (addr >= (intptr_t *) istate) {
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262 const char *field = istate->name_of_field_at_address((address) addr);
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263 if (field) {
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264 if (is_valid && !strcmp(field, "_method")) {
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265 istate->method()->name_and_sig_as_C_string(valuebuf, buflen);
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266 }
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267 else if (is_valid && !strcmp(field, "_bcp") && istate->bcp()) {
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268 snprintf(valuebuf, buflen, PTR_FORMAT " (bci %d)",
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269 (intptr_t) istate->bcp(),
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270 istate->method()->bci_from(istate->bcp()));
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271 }
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272 snprintf(fieldbuf, buflen, "%sistate->%s",
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273 field[strlen(field) - 1] == ')' ? "(": "", field);
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274 }
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275 else if (addr == (intptr_t *) istate) {
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276 strncpy(fieldbuf, "(vtable for istate)", buflen);
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277 }
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278 return;
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279 }
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280
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281 // Variable part
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282 if (!is_valid)
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283 return;
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284
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285 // JNI stuff
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286 if (istate->method()->is_native() && addr < istate->stack_base()) {
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287 address hA = istate->method()->signature_handler();
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288 if (hA != NULL) {
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289 if (hA != (address) InterpreterRuntime::slow_signature_handler) {
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290 InterpreterRuntime::SignatureHandler *handler =
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291 InterpreterRuntime::SignatureHandler::from_handlerAddr(hA);
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292
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293 intptr_t *params = istate->stack_base() - handler->argument_count();
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294 if (addr >= params) {
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295 int param = addr - params;
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296 const char *desc = "";
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297 if (param == 0)
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298 desc = " (JNIEnv)";
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299 else if (param == 1) {
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300 if (istate->method()->is_static())
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301 desc = " (mirror)";
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302 else
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303 desc = " (this)";
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304 }
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305 snprintf(fieldbuf, buflen, "parameter[%d]%s", param, desc);
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306 return;
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307 }
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308
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309 for (int i = 0; i < handler->argument_count(); i++) {
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310 if (params[i] == (intptr_t) addr) {
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311 snprintf(fieldbuf, buflen, "unboxed parameter[%d]", i);
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312 return;
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313 }
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314 }
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315 }
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316 }
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317 return;
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318 }
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319
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320 // Monitors and stack
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321 identify_vp_word(frame_index, addr,
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322 (intptr_t *) istate->monitor_base(),
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323 istate->stack_base(),
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324 fieldbuf, buflen);
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325 }
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326
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327 void SharkFrame::identify_word(int frame_index,
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328 int offset,
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329 char* fieldbuf,
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330 char* valuebuf,
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331 int buflen) const {
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332 // Fixed part
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333 switch (offset) {
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334 case pc_off:
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335 strncpy(fieldbuf, "pc", buflen);
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336 if (method()->is_oop()) {
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337 nmethod *code = method()->code();
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338 if (code && code->pc_desc_at(pc())) {
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339 SimpleScopeDesc ssd(code, pc());
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340 snprintf(valuebuf, buflen, PTR_FORMAT " (bci %d)",
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341 (intptr_t) pc(), ssd.bci());
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342 }
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343 }
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344 return;
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345
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346 case unextended_sp_off:
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347 strncpy(fieldbuf, "unextended_sp", buflen);
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348 return;
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349
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350 case method_off:
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351 strncpy(fieldbuf, "method", buflen);
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352 if (method()->is_oop()) {
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353 method()->name_and_sig_as_C_string(valuebuf, buflen);
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354 }
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355 return;
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356
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357 case oop_tmp_off:
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358 strncpy(fieldbuf, "oop_tmp", buflen);
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359 return;
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360 }
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361
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362 // Variable part
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363 if (method()->is_oop()) {
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364 identify_vp_word(frame_index, addr_of_word(offset),
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365 addr_of_word(header_words + 1),
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366 unextended_sp() + method()->max_stack(),
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367 fieldbuf, buflen);
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368 }
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369 }
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370
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371 void ZeroFrame::identify_vp_word(int frame_index,
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372 intptr_t* addr,
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373 intptr_t* monitor_base,
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374 intptr_t* stack_base,
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375 char* fieldbuf,
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376 int buflen) const {
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377 // Monitors
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378 if (addr >= stack_base && addr < monitor_base) {
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379 int monitor_size = frame::interpreter_frame_monitor_size();
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380 int last_index = (monitor_base - stack_base) / monitor_size - 1;
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381 int index = last_index - (addr - stack_base) / monitor_size;
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382 intptr_t monitor = (intptr_t) (
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383 (BasicObjectLock *) monitor_base - 1 - index);
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384 intptr_t offset = (intptr_t) addr - monitor;
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385
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386 if (offset == BasicObjectLock::obj_offset_in_bytes())
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387 snprintf(fieldbuf, buflen, "monitor[%d]->_obj", index);
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388 else if (offset == BasicObjectLock::lock_offset_in_bytes())
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389 snprintf(fieldbuf, buflen, "monitor[%d]->_lock", index);
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390
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391 return;
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392 }
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393
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394 // Expression stack
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395 if (addr < stack_base) {
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396 snprintf(fieldbuf, buflen, "%s[%d]",
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397 frame_index == 0 ? "stack_word" : "local",
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398 (int) (stack_base - addr - 1));
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399 return;
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400 }
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401 }
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