author | dholmes |
Sat, 23 Jun 2018 01:32:41 -0400 | |
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parent 47216 | 71c04702a3d5 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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|
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/* |
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* @test |
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* @bug 8087315 8010319 |
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* @summary Get old method's stack trace elements after GC |
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* @library /test/lib |
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* @modules java.base/jdk.internal.misc |
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* @modules java.compiler |
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* java.instrument |
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* jdk.jartool/sun.tools.jar |
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* @run main RedefineClassHelper |
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* @run main/othervm -javaagent:redefineagent.jar RedefineRunningMethodsWithBacktrace |
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*/ |
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import static jdk.test.lib.Asserts.*; |
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|
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// package access top-level class to avoid problem with RedefineClassHelper |
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// and nested types. |
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class RedefineRunningMethodsWithBacktrace_B { |
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static int count1 = 0; |
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static int count2 = 0; |
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public static volatile boolean stop = false; |
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static void localSleep() { |
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try { |
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Thread.sleep(10);//sleep for 10 ms |
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} catch(InterruptedException ie) { |
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} |
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} |
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|
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public static void infinite() { |
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while (!stop) { count1++; localSleep(); } |
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} |
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public static void throwable() { |
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// add some stuff to the original constant pool |
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String s1 = new String ("string1"); |
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String s2 = new String ("string2"); |
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String s3 = new String ("string3"); |
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String s4 = new String ("string4"); |
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String s5 = new String ("string5"); |
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String s6 = new String ("string6"); |
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String s7 = new String ("string7"); |
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String s8 = new String ("string8"); |
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String s9 = new String ("string9"); |
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String s10 = new String ("string10"); |
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String s11 = new String ("string11"); |
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String s12 = new String ("string12"); |
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String s13 = new String ("string13"); |
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String s14 = new String ("string14"); |
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String s15 = new String ("string15"); |
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String s16 = new String ("string16"); |
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String s17 = new String ("string17"); |
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String s18 = new String ("string18"); |
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String s19 = new String ("string19"); |
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throw new RuntimeException("throwable called"); |
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} |
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} |
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public class RedefineRunningMethodsWithBacktrace { |
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public static String newB = |
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"class RedefineRunningMethodsWithBacktrace_B {" + |
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" static int count1 = 0;" + |
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" static int count2 = 0;" + |
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" public static volatile boolean stop = false;" + |
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" static void localSleep() { " + |
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" try{ " + |
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" Thread.sleep(10);" + |
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" } catch(InterruptedException ie) { " + |
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" } " + |
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" } " + |
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" public static void infinite() { " + |
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" System.out.println(\"infinite called\");" + |
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" }" + |
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" public static void throwable() { " + |
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" throw new RuntimeException(\"throwable called\");" + |
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" }" + |
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"}"; |
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|
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public static String evenNewerB = |
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"class RedefineRunningMethodsWithBacktrace_B {" + |
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" static int count1 = 0;" + |
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" static int count2 = 0;" + |
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" public static volatile boolean stop = false;" + |
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" static void localSleep() { " + |
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" try{ " + |
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" Thread.sleep(1);" + |
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" } catch(InterruptedException ie) { " + |
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" } " + |
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" } " + |
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" public static void infinite() { }" + |
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" public static void throwable() { " + |
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" throw new RuntimeException(\"throwable called\");" + |
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" }" + |
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117 |
"}"; |
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118 |
|
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private static void touchRedefinedMethodInBacktrace(Throwable throwable) { |
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System.out.println("touchRedefinedMethodInBacktrace: "); |
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121 |
throwable.printStackTrace(); // this actually crashes with the bug in |
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122 |
// java_lang_StackTraceElement::create() |
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123 |
|
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124 |
// Make sure that we can convert the backtrace, which is referring to |
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// the redefined method, to a StrackTraceElement[] without crashing. |
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StackTraceElement[] stackTrace = throwable.getStackTrace(); |
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127 |
for (int i = 0; i < stackTrace.length; i++) { |
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128 |
StackTraceElement frame = stackTrace[i]; |
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129 |
assertNotNull(frame.getClassName(), |
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"\nTest failed: trace[" + i + "].getClassName() returned null"); |
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131 |
assertNotNull(frame.getMethodName(), |
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132 |
"\nTest failed: trace[" + i + "].getMethodName() returned null"); |
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133 |
} |
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134 |
} |
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135 |
|
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136 |
private static Throwable getThrowableInB() { |
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137 |
Throwable t = null; |
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138 |
try { |
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RedefineRunningMethodsWithBacktrace_B.throwable(); |
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140 |
} catch (Exception e) { |
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t = e; |
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// Don't print here because Throwable will cache the constructed stacktrace |
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143 |
// e.printStackTrace(); |
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144 |
} |
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145 |
return t; |
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146 |
} |
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147 |
|
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148 |
|
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149 |
public static void main(String[] args) throws Exception { |
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150 |
|
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151 |
new Thread() { |
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public void run() { |
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RedefineRunningMethodsWithBacktrace_B.infinite(); |
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154 |
} |
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}.start(); |
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156 |
|
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Throwable t1 = getThrowableInB(); |
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158 |
|
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RedefineClassHelper.redefineClass(RedefineRunningMethodsWithBacktrace_B.class, newB); |
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160 |
|
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161 |
System.gc(); |
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162 |
|
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Throwable t2 = getThrowableInB(); |
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164 |
|
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RedefineRunningMethodsWithBacktrace_B.infinite(); |
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166 |
|
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167 |
for (int i = 0; i < 20 ; i++) { |
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String s = new String("some garbage"); |
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169 |
System.gc(); |
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170 |
} |
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171 |
|
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RedefineClassHelper.redefineClass(RedefineRunningMethodsWithBacktrace_B.class, evenNewerB); |
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173 |
System.gc(); |
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174 |
|
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175 |
Throwable t3 = getThrowableInB(); |
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176 |
|
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for (int i = 0; i < 20 ; i++) { |
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RedefineRunningMethodsWithBacktrace_B.infinite(); |
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String s = new String("some garbage"); |
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180 |
System.gc(); |
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181 |
} |
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182 |
|
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183 |
touchRedefinedMethodInBacktrace(t1); |
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184 |
touchRedefinedMethodInBacktrace(t2); |
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185 |
touchRedefinedMethodInBacktrace(t3); |
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186 |
|
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// purge should clean everything up. |
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RedefineRunningMethodsWithBacktrace_B.stop = true; |
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189 |
|
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190 |
for (int i = 0; i < 20 ; i++) { |
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191 |
RedefineRunningMethodsWithBacktrace_B.infinite(); |
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String s = new String("some garbage"); |
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System.gc(); |
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194 |
} |
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195 |
} |
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196 |
} |