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<h2 title="Class Unwind" class="title">Class Unwind</h2>
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<pre>public class <span class="typeNameLabel">Unwind</span>
extends <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink" target="_blank">Object</a></pre>
<div class="block">Class for parsing the unwind information from a .eh_frame header
It creates a list of FDE's (Frame Description Entry) objects and
the associated CIE's (Common Information Entry) for the process
when created.
It can then be used to get the unwind table for a given instruction
address. The table can then be applied to the current register state
to create the previous register state (or at least the register state
that matters for further unwinding.)
See:
http://refspecs.linuxfoundation.org/LSB_3.0.0/LSB-Core-generic/LSB-Core-generic/ehframechpt.html</div>
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<td class="colFirst"><code>protected class&nbsp;</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="Unwind.DW_EH_PE.html" title="class in com.ibm.j9ddr.corereaders.elf.unwind">Unwind.DW_EH_PE</a></span></code></th>
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<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(com.ibm.j9ddr.corereaders.elf.LinuxProcessAddressSpace)">Unwind</a></span>&#8203;(<a href="../LinuxProcessAddressSpace.html" title="class in com.ibm.j9ddr.corereaders.elf">LinuxProcessAddressSpace</a>&nbsp;_process)</code></th>
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<div class="block">Create an unwinder for a process. eh_frame information is added later when
the program header entries containing it are found.</div>
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<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#addCallFrameInformation(long,com.ibm.j9ddr.corereaders.elf.ProgramHeaderEntry,java.lang.String)">addCallFrameInformation</a></span>&#8203;(long&nbsp;libraryBaseAddress,
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<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink" target="_blank">String</a>&nbsp;libName)</code></th>
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<td class="colFirst"><code><a href="UnwindTable.html" title="class in com.ibm.j9ddr.corereaders.elf.unwind">UnwindTable</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getUnwindTableForInstructionAddress(long)">getUnwindTableForInstructionAddress</a></span>&#8203;(long&nbsp;instructionPointer)</code></th>
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<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#readSignedLEB128(javax.imageio.stream.ImageInputStream)">readSignedLEB128</a></span>&#8203;(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.desktop/javax/imageio/stream/ImageInputStream.html?is-external=true" title="class or interface in javax.imageio.stream" class="externalLink" target="_blank">ImageInputStream</a>&nbsp;cfiStream)</code></th>
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<td class="colFirst"><code>static long</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#readUnsignedLEB128(javax.imageio.stream.ImageInputStream)">readUnsignedLEB128</a></span>&#8203;(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.desktop/javax/imageio/stream/ImageInputStream.html?is-external=true" title="class or interface in javax.imageio.stream" class="externalLink" target="_blank">ImageInputStream</a>&nbsp;cfiStream)</code></th>
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<h4>Unwind</h4>
<pre>public&nbsp;Unwind&#8203;(<a href="../LinuxProcessAddressSpace.html" title="class in com.ibm.j9ddr.corereaders.elf">LinuxProcessAddressSpace</a>&nbsp;_process)</pre>
<div class="block">Create an unwinder for a process. eh_frame information is added later when
the program header entries containing it are found.</div>
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<pre class="methodSignature">public&nbsp;void&nbsp;addCallFrameInformation&#8203;(long&nbsp;libraryBaseAddress,
<a href="../ProgramHeaderEntry.html" title="class in com.ibm.j9ddr.corereaders.elf">ProgramHeaderEntry</a>&nbsp;ph,
<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink" target="_blank">String</a>&nbsp;libName)
throws <a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a>,
<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/io/IOException.html?is-external=true" title="class or interface in java.io" class="externalLink" target="_blank">IOException</a></pre>
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<dd><code><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></code></dd>
<dd><code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/io/IOException.html?is-external=true" title="class or interface in java.io" class="externalLink" target="_blank">IOException</a></code></dd>
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<pre class="methodSignature">public static&nbsp;long&nbsp;readUnsignedLEB128&#8203;(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.desktop/javax/imageio/stream/ImageInputStream.html?is-external=true" title="class or interface in javax.imageio.stream" class="externalLink" target="_blank">ImageInputStream</a>&nbsp;cfiStream)
throws <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/io/IOException.html?is-external=true" title="class or interface in java.io" class="externalLink" target="_blank">IOException</a></pre>
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<pre class="methodSignature">public static&nbsp;long&nbsp;readSignedLEB128&#8203;(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.desktop/javax/imageio/stream/ImageInputStream.html?is-external=true" title="class or interface in javax.imageio.stream" class="externalLink" target="_blank">ImageInputStream</a>&nbsp;cfiStream)
throws <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/io/IOException.html?is-external=true" title="class or interface in java.io" class="externalLink" target="_blank">IOException</a></pre>
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<pre class="methodSignature">public&nbsp;<a href="UnwindTable.html" title="class in com.ibm.j9ddr.corereaders.elf.unwind">UnwindTable</a>&nbsp;getUnwindTableForInstructionAddress&#8203;(long&nbsp;instructionPointer)
throws <a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a>,
<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/io/IOException.html?is-external=true" title="class or interface in java.io" class="externalLink" target="_blank">IOException</a></pre>
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