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1 /*
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2 * Copyright 2002-2006 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 #include "incls/_precompiled.incl"
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26 #include "incls/_compileLog.cpp.incl"
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27
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28 CompileLog* CompileLog::_first = NULL;
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29
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30 // ------------------------------------------------------------------
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31 // CompileLog::CompileLog
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32 CompileLog::CompileLog(const char* file, FILE* fp, intx thread_id)
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33 : _context(_context_buffer, sizeof(_context_buffer))
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34 {
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35 initialize(new(ResourceObj::C_HEAP) fileStream(fp));
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36 _file = file;
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37 _file_end = 0;
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38 _thread_id = thread_id;
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39
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40 _identities_limit = 0;
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41 _identities_capacity = 400;
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42 _identities = NEW_C_HEAP_ARRAY(char, _identities_capacity);
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43
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44 // link into the global list
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45 { MutexLocker locker(CompileTaskAlloc_lock);
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46 _next = _first;
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47 _first = this;
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48 }
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49 }
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50
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51 CompileLog::~CompileLog() {
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52 delete _out;
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53 _out = NULL;
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54 FREE_C_HEAP_ARRAY(char, _identities);
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55 }
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56
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57
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58 // Advance kind up to a null or space, return this tail.
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59 // Make sure kind is null-terminated, not space-terminated.
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60 // Use the buffer if necessary.
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61 static const char* split_attrs(const char* &kind, char* buffer) {
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62 const char* attrs = strchr(kind, ' ');
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63 // Tease apart the first word from the rest:
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64 if (attrs == NULL) {
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65 return ""; // no attrs, no split
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66 } else if (kind == buffer) {
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67 ((char*) attrs)[-1] = 0;
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68 return attrs;
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69 } else {
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70 // park it in the buffer, so we can put a null on the end
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71 assert(!(kind >= buffer && kind < buffer+100), "not obviously in buffer")
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72 int klen = attrs - kind;
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73 strncpy(buffer, kind, klen);
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74 buffer[klen] = 0;
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75 kind = buffer; // return by reference
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76 return attrs;
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77 }
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78 }
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79
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80 // see_tag, pop_tag: Override the default do-nothing methods on xmlStream.
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81 // These methods provide a hook for managing the the extra context markup.
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82 void CompileLog::see_tag(const char* tag, bool push) {
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83 if (_context.size() > 0 && _out != NULL) {
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84 _out->write(_context.base(), _context.size());
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85 _context.reset();
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86 }
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87 xmlStream::see_tag(tag, push);
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88 }
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89 void CompileLog::pop_tag(const char* tag) {
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90 _context.reset(); // toss any context info.
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91 xmlStream::pop_tag(tag);
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92 }
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93
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94
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95 // ------------------------------------------------------------------
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96 // CompileLog::identify
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97 int CompileLog::identify(ciObject* obj) {
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98 if (obj == NULL) return 0;
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99 int id = obj->ident();
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100 if (id < 0) return id;
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101 // If it has already been identified, just return the id.
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102 if (id < _identities_limit && _identities[id] != 0) return id;
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103 // Lengthen the array, if necessary.
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104 if (id >= _identities_capacity) {
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105 int new_cap = _identities_capacity * 2;
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106 if (new_cap <= id) new_cap = id + 100;
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107 _identities = REALLOC_C_HEAP_ARRAY(char, _identities, new_cap);
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108 _identities_capacity = new_cap;
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109 }
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110 while (id >= _identities_limit) {
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111 _identities[_identities_limit++] = 0;
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112 }
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113 assert(id < _identities_limit, "oob");
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114 // Mark this id as processed.
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115 // (Be sure to do this before any recursive calls to identify.)
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116 _identities[id] = 1; // mark
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117
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118 // Now, print the object's identity once, in detail.
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119 if (obj->is_klass()) {
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120 ciKlass* klass = obj->as_klass();
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121 begin_elem("klass id='%d'", id);
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122 name(klass->name());
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123 if (!klass->is_loaded()) {
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124 print(" unloaded='1'");
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125 } else {
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126 print(" flags='%d'", klass->modifier_flags());
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127 }
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128 end_elem();
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129 } else if (obj->is_method()) {
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130 ciMethod* method = obj->as_method();
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131 ciSignature* sig = method->signature();
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132 // Pre-identify items that we will need!
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133 identify(sig->return_type());
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134 for (int i = 0; i < sig->count(); i++) {
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135 identify(sig->type_at(i));
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136 }
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137 begin_elem("method id='%d' holder='%d'",
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138 id, identify(method->holder()));
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139 name(method->name());
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140 print(" return='%d'", identify(sig->return_type()));
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141 if (sig->count() > 0) {
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142 print(" arguments='");
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143 for (int i = 0; i < sig->count(); i++) {
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144 print((i == 0) ? "%d" : " %d", identify(sig->type_at(i)));
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145 }
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146 print("'");
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147 }
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148 if (!method->is_loaded()) {
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149 print(" unloaded='1'");
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150 } else {
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151 print(" flags='%d'", (jchar) method->flags().as_int());
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152 // output a few metrics
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153 print(" bytes='%d'", method->code_size());
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154 method->log_nmethod_identity(this);
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155 //print(" count='%d'", method->invocation_count());
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156 //int bec = method->backedge_count();
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157 //if (bec != 0) print(" backedge_count='%d'", bec);
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158 print(" iicount='%d'", method->interpreter_invocation_count());
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159 }
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160 end_elem();
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161 } else if (obj->is_symbol()) {
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162 begin_elem("symbol id='%d'", id);
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163 name(obj->as_symbol());
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164 end_elem();
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165 } else if (obj->is_null_object()) {
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166 elem("null_object id='%d'", id);
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167 } else if (obj->is_type()) {
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168 BasicType type = obj->as_type()->basic_type();
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169 elem("type id='%d' name='%s'", id, type2name(type));
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170 } else {
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171 // Should not happen.
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172 elem("unknown id='%d'", id);
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173 }
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174 return id;
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175 }
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176
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177 void CompileLog::name(ciSymbol* name) {
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178 if (name == NULL) return;
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179 print(" name='");
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180 name->print_symbol_on(text()); // handles quoting conventions
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181 print("'");
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182 }
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183
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184
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185 // ------------------------------------------------------------------
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186 // CompileLog::clear_identities
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187 // Forget which identities have been printed.
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188 void CompileLog::clear_identities() {
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189 _identities_limit = 0;
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190 }
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191
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192 // ------------------------------------------------------------------
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193 // CompileLog::finish_log_on_error
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194 //
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195 // Note: This function is called after fatal error, avoid unnecessary memory
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196 // or stack allocation, use only async-safe functions. It's possible JVM is
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197 // only partially initialized.
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198 void CompileLog::finish_log_on_error(outputStream* file, char* buf, int buflen) {
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199 static bool called_exit = false;
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200 if (called_exit) return;
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201 called_exit = true;
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202
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203 for (CompileLog* log = _first; log != NULL; log = log->_next) {
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204 log->flush();
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205 const char* partial_file = log->file();
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206 int partial_fd = open(partial_file, O_RDONLY);
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207 if (partial_fd != -1) {
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208 // print/print_cr may need to allocate large stack buffer to format
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209 // strings, here we use snprintf() and print_raw() instead.
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210 file->print_raw("<compilation_log thread='");
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211 jio_snprintf(buf, buflen, UINTX_FORMAT, log->thread_id());
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212 file->print_raw(buf);
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213 file->print_raw_cr("'>");
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214
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215 size_t nr; // number read into buf from partial log
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216 // Copy data up to the end of the last <event> element:
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217 julong to_read = log->_file_end;
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218 while (to_read > 0) {
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219 if (to_read < (julong)buflen)
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220 nr = (size_t)to_read;
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221 else nr = buflen;
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222 nr = read(partial_fd, buf, (int)nr);
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223 if (nr <= 0) break;
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224 to_read -= (julong)nr;
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225 file->write(buf, nr);
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226 }
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227
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228 // Copy any remaining data inside a quote:
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229 bool saw_slop = false;
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230 int end_cdata = 0; // state machine [0..2] watching for too many "]]"
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231 while ((nr = read(partial_fd, buf, buflen)) > 0) {
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232 if (!saw_slop) {
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233 file->print_raw_cr("<fragment>");
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234 file->print_raw_cr("<![CDATA[");
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235 saw_slop = true;
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236 }
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237 // The rest of this loop amounts to a simple copy operation:
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238 // { file->write(buf, nr); }
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239 // However, it must sometimes output the buffer in parts,
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240 // in case there is a CDATA quote embedded in the fragment.
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241 const char* bufp; // pointer into buf
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242 size_t nw; // number written in each pass of the following loop:
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243 for (bufp = buf; nr > 0; nr -= nw, bufp += nw) {
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244 // Write up to any problematic CDATA delimiter (usually all of nr).
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245 for (nw = 0; nw < nr; nw++) {
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246 // First, scan ahead into the buf, checking the state machine.
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247 switch (bufp[nw]) {
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248 case ']':
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249 if (end_cdata < 2) end_cdata += 1; // saturating counter
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250 continue; // keep scanning
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251 case '>':
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252 if (end_cdata == 2) break; // found CDATA delimiter!
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253 // else fall through:
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254 default:
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255 end_cdata = 0;
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256 continue; // keep scanning
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257 }
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258 // If we get here, nw is pointing at a bad '>'.
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259 // It is very rare for this to happen.
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260 // However, this code has been tested by introducing
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261 // CDATA sequences into the compilation log.
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262 break;
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263 }
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264 // Now nw is the number of characters to write, usually == nr.
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265 file->write(bufp, nw);
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266 if (nw < nr) {
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267 // We are about to go around the loop again.
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268 // But first, disrupt the ]]> by closing and reopening the quote.
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269 file->print_raw("]]><![CDATA[");
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270 end_cdata = 0; // reset state machine
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271 }
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272 }
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273 }
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274 if (saw_slop) {
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275 file->print_raw_cr("]]>");
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276 file->print_raw_cr("</fragment>");
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277 }
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278 file->print_raw_cr("</compilation_log>");
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279 close(partial_fd);
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280 unlink(partial_file);
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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 // CompileLog::finish_log
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287 //
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288 // Called during normal shutdown. For now, any clean-up needed in normal
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289 // shutdown is also needed in VM abort, so is covered by finish_log_on_error().
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290 // Just allocate a buffer and call finish_log_on_error().
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291 void CompileLog::finish_log(outputStream* file) {
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292 char buf[4 * K];
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293 finish_log_on_error(file, buf, sizeof(buf));
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294 }
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