annotate src/share/vm/utilities/debug.hpp @ 2152:0fa27f37d4d4

6977804: G1: remove the zero-filling thread Summary: This changeset removes the zero-filling thread from G1 and collapses the two free region lists we had before (the "free" and "unclean" lists) into one. The new free list uses the new heap region sets / lists abstractions that we'll ultimately use it to keep track of all regions in the heap. A heap region set was also introduced for the humongous regions. Finally, this change increases the concurrency between the thread that completes freeing regions (after a cleanup pause) and the rest of the system (before we'd have to wait for said thread to complete before allocating a new region). The changest also includes a lot of refactoring and code simplification. Reviewed-by: jcoomes, johnc
author tonyp
date Wed, 19 Jan 2011 19:30:42 -0500
parents f95d63e2154a
children 3582bf76420e
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1 /*
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2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 #ifndef SHARE_VM_UTILITIES_DEBUG_HPP
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26 #define SHARE_VM_UTILITIES_DEBUG_HPP
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27
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28 #include "utilities/globalDefinitions.hpp"
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29
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30 #include <stdarg.h>
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31
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32 // Simple class to format the ctor arguments into a fixed-sized buffer.
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33 template <size_t bufsz = 256>
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34 class FormatBuffer {
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35 public:
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36 inline FormatBuffer(const char * format, ...);
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37 inline void append(const char* format, ...);
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38 operator const char *() const { return _buf; }
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39
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40 private:
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41 FormatBuffer(const FormatBuffer &); // prevent copies
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42
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43 private:
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44 char _buf[bufsz];
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45 };
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46
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47 template <size_t bufsz>
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48 FormatBuffer<bufsz>::FormatBuffer(const char * format, ...) {
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49 va_list argp;
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50 va_start(argp, format);
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51 vsnprintf(_buf, bufsz, format, argp);
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52 va_end(argp);
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53 }
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54
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55 template <size_t bufsz>
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56 void FormatBuffer<bufsz>::append(const char* format, ...) {
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57 // Given that the constructor does a vsnprintf we can assume that
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58 // _buf is already initialized.
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59 size_t len = strlen(_buf);
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60 char* buf_end = _buf + len;
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61
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62 va_list argp;
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63 va_start(argp, format);
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64 vsnprintf(buf_end, bufsz - len, format, argp);
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65 va_end(argp);
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66 }
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67
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68 // Used to format messages for assert(), guarantee(), fatal(), etc.
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69 typedef FormatBuffer<> err_msg;
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70
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71 // assertions
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72 #ifdef ASSERT
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73 #ifndef USE_REPEATED_ASSERTS
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74 #define assert(p, msg) \
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75 do { \
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76 if (!(p)) { \
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77 report_vm_error(__FILE__, __LINE__, "assert(" #p ") failed", msg); \
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78 BREAKPOINT; \
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79 } \
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80 } while (0)
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81 #else // #ifndef USE_REPEATED_ASSERTS
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82 #define assert(p, msg)
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83 do { \
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84 for (int __i = 0; __i < AssertRepeat; __i++) { \
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85 if (!(p)) { \
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86 report_vm_error(__FILE__, __LINE__, "assert(" #p ") failed", msg); \
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87 BREAKPOINT; \
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88 } \
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89 } \
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90 } while (0)
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91 #endif // #ifndef USE_REPEATED_ASSERTS
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92
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93 // This version of assert is for use with checking return status from
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94 // library calls that return actual error values eg. EINVAL,
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95 // ENOMEM etc, rather than returning -1 and setting errno.
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96 // When the status is not what is expected it is very useful to know
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97 // what status was actually returned, so we pass the status variable as
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98 // an extra arg and use strerror to convert it to a meaningful string
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99 // like "Invalid argument", "out of memory" etc
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100 #define assert_status(p, status, msg) \
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101 do { \
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102 if (!(p)) { \
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103 report_vm_error(__FILE__, __LINE__, "assert(" #p ") failed", \
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104 err_msg("error %s(%d) %s", strerror(status), \
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105 status, msg)); \
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106 BREAKPOINT; \
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107 } \
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108 } while (0)
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109
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110 // Do not assert this condition if there's already another error reported.
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111 #define assert_if_no_error(cond,msg) assert((cond) || is_error_reported(), msg)
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112 #else // #ifdef ASSERT
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113 #define assert(p,msg)
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114 #define assert_status(p,status,msg)
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115 #define assert_if_no_error(cond,msg)
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116 #endif // #ifdef ASSERT
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117
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118 // guarantee is like assert except it's always executed -- use it for
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119 // cheap tests that catch errors that would otherwise be hard to find.
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120 // guarantee is also used for Verify options.
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121 #define guarantee(p, msg) \
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122 do { \
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123 if (!(p)) { \
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124 report_vm_error(__FILE__, __LINE__, "guarantee(" #p ") failed", msg); \
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125 BREAKPOINT; \
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126 } \
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127 } while (0)
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128
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129 #define fatal(msg) \
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130 do { \
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131 report_fatal(__FILE__, __LINE__, msg); \
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132 BREAKPOINT; \
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133 } while (0)
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134
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135 // out of memory
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136 #define vm_exit_out_of_memory(size, msg) \
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137 do { \
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138 report_vm_out_of_memory(__FILE__, __LINE__, size, msg); \
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139 BREAKPOINT; \
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140 } while (0)
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141
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142 #define ShouldNotCallThis() \
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143 do { \
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144 report_should_not_call(__FILE__, __LINE__); \
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145 BREAKPOINT; \
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146 } while (0)
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147
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148 #define ShouldNotReachHere() \
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149 do { \
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150 report_should_not_reach_here(__FILE__, __LINE__); \
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151 BREAKPOINT; \
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152 } while (0)
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153
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154 #define Unimplemented() \
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155 do { \
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156 report_unimplemented(__FILE__, __LINE__); \
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157 BREAKPOINT; \
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158 } while (0)
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159
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160 #define Untested(msg) \
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161 do { \
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162 report_untested(__FILE__, __LINE__, msg); \
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163 BREAKPOINT; \
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164 } while (0);
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165
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166 // error reporting helper functions
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167 void report_vm_error(const char* file, int line, const char* error_msg,
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168 const char* detail_msg = NULL);
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169 void report_fatal(const char* file, int line, const char* message);
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170 void report_vm_out_of_memory(const char* file, int line, size_t size,
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171 const char* message);
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172 void report_should_not_call(const char* file, int line);
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173 void report_should_not_reach_here(const char* file, int line);
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174 void report_unimplemented(const char* file, int line);
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175 void report_untested(const char* file, int line, const char* message);
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176
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177 void warning(const char* format, ...);
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178
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179 // out of memory reporting
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180 void report_java_out_of_memory(const char* message);
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181
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182 // Support for self-destruct
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183 bool is_error_reported();
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184 void set_error_reported();
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185
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186 /* Test assert(), fatal(), guarantee(), etc. */
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187 NOT_PRODUCT(void test_error_handler(size_t test_num);)
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188
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189 void pd_ps(frame f);
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190 void pd_obfuscate_location(char *buf, size_t buflen);
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191
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192 #endif // SHARE_VM_UTILITIES_DEBUG_HPP