author | sherman |
Tue, 30 Aug 2011 11:53:11 -0700 | |
changeset 10419 | 12c063b39232 |
parent 5506 | 202f599c92aa |
child 11365 | 05d995976571 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2005, 2006, 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. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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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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package sun.tools.attach; |
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import com.sun.tools.attach.VirtualMachine; |
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import com.sun.tools.attach.AgentLoadException; |
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import com.sun.tools.attach.AgentInitializationException; |
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import com.sun.tools.attach.spi.AttachProvider; |
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import java.io.InputStream; |
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import java.io.IOException; |
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import java.util.Properties; |
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import java.util.Map; |
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/* |
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* The HotSpot implementation of com.sun.tools.attach.VirtualMachine. |
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*/ |
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public abstract class HotSpotVirtualMachine extends VirtualMachine { |
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HotSpotVirtualMachine(AttachProvider provider, String id) { |
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super(provider, id); |
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} |
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/* |
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* Load agent library |
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* If isAbsolute is true then the agent library is the absolute path |
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* to the library and thus will not be expanded in the target VM. |
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* if isAbsolute is false then the agent library is just a library |
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* name and it will be expended in the target VM. |
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*/ |
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private void loadAgentLibrary(String agentLibrary, boolean isAbsolute, String options) |
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throws AgentLoadException, AgentInitializationException, IOException |
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{ |
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InputStream in = execute("load", |
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agentLibrary, |
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isAbsolute ? "true" : "false", |
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options); |
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try { |
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int result = readInt(in); |
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if (result != 0) { |
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throw new AgentInitializationException("Agent_OnAttach failed", result); |
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} |
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} finally { |
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in.close(); |
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} |
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} |
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/* |
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* Load agent library - library name will be expanded in target VM |
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*/ |
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public void loadAgentLibrary(String agentLibrary, String options) |
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throws AgentLoadException, AgentInitializationException, IOException |
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{ |
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loadAgentLibrary(agentLibrary, false, options); |
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} |
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/* |
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* Load agent - absolute path of library provided to target VM |
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*/ |
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public void loadAgentPath(String agentLibrary, String options) |
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throws AgentLoadException, AgentInitializationException, IOException |
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{ |
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loadAgentLibrary(agentLibrary, true, options); |
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} |
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/* |
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* Load JPLIS agent which will load the agent JAR file and invoke |
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* the agentmain method. |
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*/ |
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public void loadAgent(String agent, String options) |
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throws AgentLoadException, AgentInitializationException, IOException |
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{ |
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String args = agent; |
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if (options != null) { |
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args = args + "=" + options; |
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} |
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try { |
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loadAgentLibrary("instrument", args); |
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} catch (AgentLoadException x) { |
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10419
12c063b39232
7084245: Update usages of InternalError to use exception chaining
sherman
parents:
5506
diff
changeset
|
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throw new InternalError("instrument library is missing in target VM", x); |
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} catch (AgentInitializationException x) { |
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/* |
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* Translate interesting errors into the right exception and |
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* message (FIXME: create a better interface to the instrument |
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* implementation so this isn't necessary) |
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*/ |
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int rc = x.returnValue(); |
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switch (rc) { |
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case JNI_ENOMEM: |
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throw new AgentLoadException("Insuffient memory"); |
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case ATTACH_ERROR_BADJAR: |
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throw new AgentLoadException("Agent JAR not found or no Agent-Class attribute"); |
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case ATTACH_ERROR_NOTONCP: |
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throw new AgentLoadException("Unable to add JAR file to system class path"); |
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case ATTACH_ERROR_STARTFAIL: |
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throw new AgentInitializationException("Agent JAR loaded but agent failed to initialize"); |
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default : |
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throw new AgentLoadException("Failed to load agent - unknown reason: " + rc); |
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} |
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} |
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} |
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/* |
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* The possible errors returned by JPLIS's agentmain |
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*/ |
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private static final int JNI_ENOMEM = -4; |
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private static final int ATTACH_ERROR_BADJAR = 100; |
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private static final int ATTACH_ERROR_NOTONCP = 101; |
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private static final int ATTACH_ERROR_STARTFAIL = 102; |
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/* |
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* Send "properties" command to target VM |
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*/ |
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public Properties getSystemProperties() throws IOException { |
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InputStream in = null; |
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Properties props = new Properties(); |
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try { |
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in = executeCommand("properties"); |
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props.load(in); |
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} finally { |
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if (in != null) in.close(); |
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} |
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return props; |
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} |
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public Properties getAgentProperties() throws IOException { |
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InputStream in = null; |
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Properties props = new Properties(); |
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try { |
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in = executeCommand("agentProperties"); |
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props.load(in); |
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} finally { |
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if (in != null) in.close(); |
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} |
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return props; |
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} |
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// --- HotSpot specific methods --- |
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// same as SIGQUIT |
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public void localDataDump() throws IOException { |
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executeCommand("datadump").close(); |
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} |
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// Remote ctrl-break. The output of the ctrl-break actions can |
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// be read from the input stream. |
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public InputStream remoteDataDump(Object ... args) throws IOException { |
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return executeCommand("threaddump", args); |
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} |
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// Remote heap dump. The output (error message) can be read from the |
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// returned input stream. |
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public InputStream dumpHeap(Object ... args) throws IOException { |
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return executeCommand("dumpheap", args); |
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} |
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// Heap histogram (heap inspection in HotSpot) |
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public InputStream heapHisto(Object ... args) throws IOException { |
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return executeCommand("inspectheap", args); |
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} |
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// set JVM command line flag |
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public InputStream setFlag(String name, String value) throws IOException { |
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return executeCommand("setflag", name, value); |
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} |
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// print command line flag |
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public InputStream printFlag(String name) throws IOException { |
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return executeCommand("printflag", name); |
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} |
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// -- Supporting methods |
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/* |
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* Execute the given command in the target VM - specific platform |
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* implementation must implement this. |
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*/ |
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abstract InputStream execute(String cmd, Object ... args) |
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throws AgentLoadException, IOException; |
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/* |
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* Convenience method for simple commands |
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*/ |
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private InputStream executeCommand(String cmd, Object ... args) throws IOException { |
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try { |
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return execute(cmd, args); |
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} catch (AgentLoadException x) { |
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10419
12c063b39232
7084245: Update usages of InternalError to use exception chaining
sherman
parents:
5506
diff
changeset
|
215 |
throw new InternalError("Should not get here", x); |
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} |
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} |
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/* |
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* Utility method to read an 'int' from the input stream. Ideally |
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* we should be using java.util.Scanner here but this implementation |
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* guarantees not to read ahead. |
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*/ |
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int readInt(InputStream in) throws IOException { |
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StringBuilder sb = new StringBuilder(); |
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// read to \n or EOF |
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int n; |
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byte buf[] = new byte[1]; |
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do { |
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n = in.read(buf, 0, 1); |
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if (n > 0) { |
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char c = (char)buf[0]; |
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if (c == '\n') { |
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break; // EOL found |
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} else { |
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sb.append(c); |
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} |
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} |
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} while (n > 0); |
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if (sb.length() == 0) { |
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throw new IOException("Premature EOF"); |
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} |
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int value; |
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try { |
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value = Integer.parseInt(sb.toString()); |
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} catch (NumberFormatException x) { |
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throw new IOException("Non-numeric value found - int expected"); |
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} |
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return value; |
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} |
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// -- attach timeout support |
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private static long defaultAttachTimeout = 5000; |
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private volatile long attachTimeout; |
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/* |
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* Return attach timeout based on the value of the sun.tools.attach.attachTimeout |
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* property, or the default timeout if the property is not set to a positive |
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* value. |
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*/ |
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long attachTimeout() { |
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if (attachTimeout == 0) { |
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synchronized(this) { |
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if (attachTimeout == 0) { |
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try { |
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String s = |
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System.getProperty("sun.tools.attach.attachTimeout"); |
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attachTimeout = Long.parseLong(s); |
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} catch (SecurityException se) { |
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} catch (NumberFormatException ne) { |
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} |
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if (attachTimeout <= 0) { |
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attachTimeout = defaultAttachTimeout; |
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} |
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} |
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} |
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} |
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return attachTimeout; |
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} |
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} |