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<p>Perhaps the solution is to replace the entire class, instead of
instrumenting one method?</p>
<p>Compile a patched copy of the JVM, with modified class files,
then replace the existing classes in the JVM with the modified
classes?</p>
<p>Kinda like maintaining a fork, but using Agents to instrument the
original JVM with classes from the fork?</p>
I sure wish there was a better option, if anyone knows one, I'm all
ears.<br>
<p>Regards,</p>
<p>Peter.<br>
</p>
<div class="moz-cite-prefix">On 23/07/2021 6:36 pm, Peter Firmstone
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:d1c941fe-967f-8827-91c4-05295bb9024d@zeus.net.au">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
Post JEP 411, we need to write Agents to replace the current
permission checks performed within the JVM by instrumenting it,
following advice by OpenJDK developers, however for us this goes
against all our previous development practices, no part of our
codebase accesses any JDK implementation classes or internal
api's. We also don't release anything that depends on deprecated
API's. Modules didn't break our code, neither has tightening
rules around access in JEP 403.<br>
<p>We have been advised that we need to instrument the JDK with
Agent's by OpenJDK.<br>
</p>
<p>I am now ready to write these Agents, so that I can begin
testing my new authorization layer for Java: <a
class="moz-txt-link-freetext"
href="https://github.com/pfirmstone/HighPerformanceSecurity"
moz-do-not-send="true">https://github.com/pfirmstone/HighPerformanceSecurity</a></p>
<p> As an example, we need to instrument java.lang.ClassLoader, in
this case we need to instrument the following method:</p>
<p><span class="pl-k">private</span> <span class="pl-k">static</span>
<span class="pl-smi"><span class="pl-token"
data-hydro-click="{"event_type":"code_navigation.click_on_symbol","payload":{"action":"click_on_symbol","repository_id":370898673,"ref":"cd8783c08ee18167f15df621e997015b971bfb01","language":"Java","originating_url":"https://github.com/pfirmstone/jdk/blob/cd8783c08ee18167f15df621e997015b971bfb01/src/java.base/share/classes/java/lang/ClassLoader.java","user_id":11625778}}"
data-hydro-click-hmac="aab2699bf8d5b6116760e1b70c1d90c08084c67fd0148bd7203b48443a421d1c">Void</span></span>
<span class="pl-en"><span class="pl-token"
data-hydro-click="{"event_type":"code_navigation.click_on_symbol","payload":{"action":"click_on_symbol","repository_id":370898673,"ref":"cd8783c08ee18167f15df621e997015b971bfb01","language":"Java","originating_url":"https://github.com/pfirmstone/jdk/blob/cd8783c08ee18167f15df621e997015b971bfb01/src/java.base/share/classes/java/lang/ClassLoader.java","user_id":11625778}}"
data-hydro-click-hmac="aab2699bf8d5b6116760e1b70c1d90c08084c67fd0148bd7203b48443a421d1c">checkCreateClassLoader</span></span>(<span
class="pl-smi"><span class="pl-token"
data-hydro-click="{"event_type":"code_navigation.click_on_symbol","payload":{"action":"click_on_symbol","repository_id":370898673,"ref":"cd8783c08ee18167f15df621e997015b971bfb01","language":"Java","originating_url":"https://github.com/pfirmstone/jdk/blob/cd8783c08ee18167f15df621e997015b971bfb01/src/java.base/share/classes/java/lang/ClassLoader.java","user_id":11625778}}"
data-hydro-click-hmac="aab2699bf8d5b6116760e1b70c1d90c08084c67fd0148bd7203b48443a421d1c">String</span></span>
<span class="pl-v">name</span>); This check must be performed
prior to calling java.lang.Object's constructor, to throw an
exception, without making ClassLoader susceptible to a finalizer
attack.<br>
</p>
<p>Accessing private internal methods goes against all our current
development practices, these are at risk of breaking in future.</p>
<p>We cannot add methods with Agent's only change method contents.<br>
</p>
<p>I am requesting hooks, in the form of an annotation, such as
the following, so that OpenJDK developers know that this method
will be instrumented by Agent's and not to change it's
signature.<br>
</p>
<p>@Instrumented<span class="pl-k"><br>
</span></p>
<p><span class="pl-k">private</span> <span class="pl-k">static</span>
<span class="pl-smi"><span class="pl-token"
data-hydro-click="{"event_type":"code_navigation.click_on_symbol","payload":{"action":"click_on_symbol","repository_id":370898673,"ref":"cd8783c08ee18167f15df621e997015b971bfb01","language":"Java","originating_url":"https://github.com/pfirmstone/jdk/blob/cd8783c08ee18167f15df621e997015b971bfb01/src/java.base/share/classes/java/lang/ClassLoader.java","user_id":11625778}}"
data-hydro-click-hmac="aab2699bf8d5b6116760e1b70c1d90c08084c67fd0148bd7203b48443a421d1c">Void</span></span>
<span class="pl-en"><span class="pl-token"
data-hydro-click="{"event_type":"code_navigation.click_on_symbol","payload":{"action":"click_on_symbol","repository_id":370898673,"ref":"cd8783c08ee18167f15df621e997015b971bfb01","language":"Java","originating_url":"https://github.com/pfirmstone/jdk/blob/cd8783c08ee18167f15df621e997015b971bfb01/src/java.base/share/classes/java/lang/ClassLoader.java","user_id":11625778}}"
data-hydro-click-hmac="aab2699bf8d5b6116760e1b70c1d90c08084c67fd0148bd7203b48443a421d1c">checkCreateClassLoader</span></span>(<span
class="pl-smi"><span class="pl-token"
data-hydro-click="{"event_type":"code_navigation.click_on_symbol","payload":{"action":"click_on_symbol","repository_id":370898673,"ref":"cd8783c08ee18167f15df621e997015b971bfb01","language":"Java","originating_url":"https://github.com/pfirmstone/jdk/blob/cd8783c08ee18167f15df621e997015b971bfb01/src/java.base/share/classes/java/lang/ClassLoader.java","user_id":11625778}}"
data-hydro-click-hmac="aab2699bf8d5b6116760e1b70c1d90c08084c67fd0148bd7203b48443a421d1c">String</span></span>
<span class="pl-v">name</span>);</p>
<p>If OpenJDK will provide instrumentation hooks, then this is a
workable solution for us. <br>
</p>
<p>Or is OpenJDK encouraging us to start accessing private methods
and have to test each Java release for breakages?</p>
<p>I'm wondering what the point of JEP 403 is if, our solution to
JEP 411, is to start instrumenting private methods? I don't
think this is what OpenJDK developers are proposing.<br>
</p>
<p>Currently removing SM will allow an attacker to cause our
software running on the JVM to parse untrusted data, which
previously required an authenticated client? Permission is only
granted to Principal's, of course post JEP 411, these checks
will stop working in future, making our software vulnerable to
attacks by unauthenticated users.<br>
</p>
<p>We're still up in the air about how to provide credentials for
our TLS and Kerberos connections, for authentication, I've
created support for obtaining the Subject from the Authorization
context, in my authorization layer software (linked above), but
instrumenting private methods in the JDK goes against all
previously learned best practices.</p>
<pre class="moz-signature" cols="72">--
Regards,
Peter Firmstone</pre>
<p>Code snippet from java.lang.ClassLoader:</p>
<p> </p>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC364" class="blob-code blob-code-inner
js-file-line"> <span class="pl-k">if</span> (name <span
class="pl-k">!=</span> <span class="pl-c1">null</span>
<span class="pl-k">&&</span> <span
class="pl-token"
data-hydro-click="{"event_type":"code_navigation.click_on_symbol","payload":{"action":"click_on_symbol","repository_id":370898673,"ref":"cd8783c08ee18167f15df621e997015b971bfb01","language":"Java","originating_url":"https://github.com/pfirmstone/jdk/blob/cd8783c08ee18167f15df621e997015b971bfb01/src/java.base/share/classes/java/lang/ClassLoader.java","user_id":11625778}}"
data-hydro-click-hmac="aab2699bf8d5b6116760e1b70c1d90c08084c67fd0148bd7203b48443a421d1c">name</span><span
class="pl-k">.</span><span class="pl-token"
data-hydro-click="{"event_type":"code_navigation.click_on_symbol","payload":{"action":"click_on_symbol","repository_id":370898673,"ref":"cd8783c08ee18167f15df621e997015b971bfb01","language":"Java","originating_url":"https://github.com/pfirmstone/jdk/blob/cd8783c08ee18167f15df621e997015b971bfb01/src/java.base/share/classes/java/lang/ClassLoader.java","user_id":11625778}}"
data-hydro-click-hmac="aab2699bf8d5b6116760e1b70c1d90c08084c67fd0148bd7203b48443a421d1c">isEmpty</span>())
{</td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC365" class="blob-code blob-code-inner
js-file-line"> <span class="pl-k">throw</span> <span
class="pl-k">new</span> <span class="pl-smi"><span
class="pl-token"
data-hydro-click="{"event_type":"code_navigation.click_on_symbol","payload":{"action":"click_on_symbol","repository_id":370898673,"ref":"cd8783c08ee18167f15df621e997015b971bfb01","language":"Java","originating_url":"https://github.com/pfirmstone/jdk/blob/cd8783c08ee18167f15df621e997015b971bfb01/src/java.base/share/classes/java/lang/ClassLoader.java","user_id":11625778}}"
data-hydro-click-hmac="aab2699bf8d5b6116760e1b70c1d90c08084c67fd0148bd7203b48443a421d1c">IllegalArgumentException</span></span>(<span
class="pl-s"><span class="pl-pds">"</span>name must be
non-empty or null<span class="pl-pds">"</span></span>);</td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC366" class="blob-code blob-code-inner
js-file-line"> }</td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC367" class="blob-code blob-code-inner
js-file-line"> <br>
</td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC368" class="blob-code blob-code-inner
js-file-line"> <span class="pl-k">@SuppressWarnings</span>(<span
class="pl-s"><span class="pl-pds">"</span>removal<span
class="pl-pds">"</span></span>)</td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC369" class="blob-code blob-code-inner
js-file-line"> <span class="pl-smi"><span
class="pl-token"
data-hydro-click="{"event_type":"code_navigation.click_on_symbol","payload":{"action":"click_on_symbol","repository_id":370898673,"ref":"cd8783c08ee18167f15df621e997015b971bfb01","language":"Java","originating_url":"https://github.com/pfirmstone/jdk/blob/cd8783c08ee18167f15df621e997015b971bfb01/src/java.base/share/classes/java/lang/ClassLoader.java","user_id":11625778}}"
data-hydro-click-hmac="aab2699bf8d5b6116760e1b70c1d90c08084c67fd0148bd7203b48443a421d1c">SecurityManager</span></span>
<span class="pl-token"
data-hydro-click="{"event_type":"code_navigation.click_on_symbol","payload":{"action":"click_on_symbol","repository_id":370898673,"ref":"cd8783c08ee18167f15df621e997015b971bfb01","language":"Java","originating_url":"https://github.com/pfirmstone/jdk/blob/cd8783c08ee18167f15df621e997015b971bfb01/src/java.base/share/classes/java/lang/ClassLoader.java","user_id":11625778}}"
data-hydro-click-hmac="aab2699bf8d5b6116760e1b70c1d90c08084c67fd0148bd7203b48443a421d1c">security</span>
<span class="pl-k">=</span> <span class="pl-smi">System</span><span
class="pl-k">.</span><span class="pl-token"
data-hydro-click="{"event_type":"code_navigation.click_on_symbol","payload":{"action":"click_on_symbol","repository_id":370898673,"ref":"cd8783c08ee18167f15df621e997015b971bfb01","language":"Java","originating_url":"https://github.com/pfirmstone/jdk/blob/cd8783c08ee18167f15df621e997015b971bfb01/src/java.base/share/classes/java/lang/ClassLoader.java","user_id":11625778}}"
data-hydro-click-hmac="aab2699bf8d5b6116760e1b70c1d90c08084c67fd0148bd7203b48443a421d1c">getSecurityManager</span>();</td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC370" class="blob-code blob-code-inner
js-file-line"> <span class="pl-k">if</span> (<span
class="pl-token"
data-hydro-click="{"event_type":"code_navigation.click_on_symbol","payload":{"action":"click_on_symbol","repository_id":370898673,"ref":"cd8783c08ee18167f15df621e997015b971bfb01","language":"Java","originating_url":"https://github.com/pfirmstone/jdk/blob/cd8783c08ee18167f15df621e997015b971bfb01/src/java.base/share/classes/java/lang/ClassLoader.java","user_id":11625778}}"
data-hydro-click-hmac="aab2699bf8d5b6116760e1b70c1d90c08084c67fd0148bd7203b48443a421d1c">security</span>
<span class="pl-k">!=</span> <span class="pl-c1">null</span>)
{</td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC371" class="blob-code blob-code-inner
js-file-line"> <span class="pl-token"
data-hydro-click="{"event_type":"code_navigation.click_on_symbol","payload":{"action":"click_on_symbol","repository_id":370898673,"ref":"cd8783c08ee18167f15df621e997015b971bfb01","language":"Java","originating_url":"https://github.com/pfirmstone/jdk/blob/cd8783c08ee18167f15df621e997015b971bfb01/src/java.base/share/classes/java/lang/ClassLoader.java","user_id":11625778}}"
data-hydro-click-hmac="aab2699bf8d5b6116760e1b70c1d90c08084c67fd0148bd7203b48443a421d1c">security</span><span
class="pl-k">.</span><span class="pl-token"
data-hydro-click="{"event_type":"code_navigation.click_on_symbol","payload":{"action":"click_on_symbol","repository_id":370898673,"ref":"cd8783c08ee18167f15df621e997015b971bfb01","language":"Java","originating_url":"https://github.com/pfirmstone/jdk/blob/cd8783c08ee18167f15df621e997015b971bfb01/src/java.base/share/classes/java/lang/ClassLoader.java","user_id":11625778}}"
data-hydro-click-hmac="aab2699bf8d5b6116760e1b70c1d90c08084c67fd0148bd7203b48443a421d1c">checkCreateClassLoader</span>();</td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC372" class="blob-code blob-code-inner
js-file-line"> }</td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC373" class="blob-code blob-code-inner
js-file-line"> <span class="pl-k">return</span> <span
class="pl-c1">null</span>;</td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC374" class="blob-code blob-code-inner
js-file-line"> }</td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC375" class="blob-code blob-code-inner
js-file-line"> <br>
</td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC376" class="blob-code blob-code-inner
js-file-line"> <span class="pl-k">private</span> <span
class="pl-en"><span class="pl-token"
data-hydro-click="{"event_type":"code_navigation.click_on_symbol","payload":{"action":"click_on_symbol","repository_id":370898673,"ref":"cd8783c08ee18167f15df621e997015b971bfb01","language":"Java","originating_url":"https://github.com/pfirmstone/jdk/blob/cd8783c08ee18167f15df621e997015b971bfb01/src/java.base/share/classes/java/lang/ClassLoader.java","user_id":11625778}}"
data-hydro-click-hmac="aab2699bf8d5b6116760e1b70c1d90c08084c67fd0148bd7203b48443a421d1c">ClassLoader</span></span>(<span
class="pl-smi"><span class="pl-token"
data-hydro-click="{"event_type":"code_navigation.click_on_symbol","payload":{"action":"click_on_symbol","repository_id":370898673,"ref":"cd8783c08ee18167f15df621e997015b971bfb01","language":"Java","originating_url":"https://github.com/pfirmstone/jdk/blob/cd8783c08ee18167f15df621e997015b971bfb01/src/java.base/share/classes/java/lang/ClassLoader.java","user_id":11625778}}"
data-hydro-click-hmac="aab2699bf8d5b6116760e1b70c1d90c08084c67fd0148bd7203b48443a421d1c">Void</span></span>
<span class="pl-v">unused</span>, <span class="pl-smi">String</span>
<span class="pl-v">name</span>, <span class="pl-smi">ClassLoader</span>
<span class="pl-v">parent</span>) {</td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC377" class="blob-code blob-code-inner
js-file-line"> <span class="pl-c1"><span class="pl-token"
data-hydro-click="{"event_type":"code_navigation.click_on_symbol","payload":{"action":"click_on_symbol","repository_id":370898673,"ref":"cd8783c08ee18167f15df621e997015b971bfb01","language":"Java","originating_url":"https://github.com/pfirmstone/jdk/blob/cd8783c08ee18167f15df621e997015b971bfb01/src/java.base/share/classes/java/lang/ClassLoader.java","user_id":11625778}}"
data-hydro-click-hmac="aab2699bf8d5b6116760e1b70c1d90c08084c67fd0148bd7203b48443a421d1c">this</span></span><span
class="pl-k">.</span><span class="pl-token"
data-hydro-click="{"event_type":"code_navigation.click_on_symbol","payload":{"action":"click_on_symbol","repository_id":370898673,"ref":"cd8783c08ee18167f15df621e997015b971bfb01","language":"Java","originating_url":"https://github.com/pfirmstone/jdk/blob/cd8783c08ee18167f15df621e997015b971bfb01/src/java.base/share/classes/java/lang/ClassLoader.java","user_id":11625778}}"
data-hydro-click-hmac="aab2699bf8d5b6116760e1b70c1d90c08084c67fd0148bd7203b48443a421d1c">name</span>
<span class="pl-k">=</span> name;</td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC378" class="blob-code blob-code-inner
js-file-line"> <span class="pl-c1">this</span><span
class="pl-k">.</span>parent <span class="pl-k">=</span>
parent;</td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC379" class="blob-code blob-code-inner
js-file-line"> <span class="pl-c1">this</span><span
class="pl-k">.</span>unnamedModule <span class="pl-k">=</span>
<span class="pl-k">new</span> <span class="pl-smi">Module</span>(<span
class="pl-c1">this</span>);</td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC380" class="blob-code blob-code-inner
js-file-line"> <span class="pl-k">if</span> (<span
class="pl-smi">ParallelLoaders</span><span class="pl-k">.</span>isRegistered(<span
class="pl-c1">this</span><span class="pl-k">.</span>getClass()))
{</td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC381" class="blob-code blob-code-inner
js-file-line"> parallelLockMap <span class="pl-k">=</span>
<span class="pl-k">new</span> <span class="pl-k">ConcurrentHashMap<></span>();</td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC382" class="blob-code blob-code-inner
js-file-line"> assertionLock <span class="pl-k">=</span>
<span class="pl-k">new</span> <span class="pl-smi">Object</span>();</td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC383" class="blob-code blob-code-inner
js-file-line"> } <span class="pl-k">else</span> {</td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC384" class="blob-code blob-code-inner
js-file-line"> <span class="pl-c"><span class="pl-c">//</span>
no finer-grained lock; lock on the classloader instance</span></td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC385" class="blob-code blob-code-inner
js-file-line"> parallelLockMap <span class="pl-k">=</span>
<span class="pl-c1">null</span>;</td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC386" class="blob-code blob-code-inner
js-file-line"> assertionLock <span class="pl-k">=</span>
<span class="pl-c1">this</span>;</td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC387" class="blob-code blob-code-inner
js-file-line"> }</td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC388" class="blob-code blob-code-inner
js-file-line"> <span class="pl-c1">this</span><span
class="pl-k">.</span>package2certs <span class="pl-k">=</span>
<span class="pl-k">new</span> <span class="pl-k">ConcurrentHashMap<></span>();</td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC389" class="blob-code blob-code-inner
js-file-line"> <span class="pl-c1">this</span><span
class="pl-k">.</span>nameAndId <span class="pl-k">=</span>
nameAndId(<span class="pl-c1">this</span>);</td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC390" class="blob-code blob-code-inner
js-file-line"> }</td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC391" class="blob-code blob-code-inner
js-file-line"> <br>
</td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC392" class="blob-code blob-code-inner
js-file-line"> <span class="pl-c"><span class="pl-c">/**</span></span></td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC393" class="blob-code blob-code-inner
js-file-line"><span class="pl-c"> * If the defining loader
has a name explicitly set then</span></td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC394" class="blob-code blob-code-inner
js-file-line"><span class="pl-c"> * '<loader-name>'
<span class="pl-k">@<id></span></span></td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC395" class="blob-code blob-code-inner
js-file-line"><span class="pl-c"> * If the defining loader
has no name then</span></td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC396" class="blob-code blob-code-inner
js-file-line"><span class="pl-c"> *
<qualified-class-name> <span class="pl-k">@<id></span></span></td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC397" class="blob-code blob-code-inner
js-file-line"><span class="pl-c"> * If it's built-in
loader then omit `<span class="pl-k">@<id>`</span>
as there is only one instance.</span></td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC398" class="blob-code blob-code-inner
js-file-line"><span class="pl-c"> <span class="pl-c">*/</span></span></td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC399" class="blob-code blob-code-inner
js-file-line"> <span class="pl-k">private</span> <span
class="pl-k">static</span> <span class="pl-smi">String</span>
<span class="pl-en">nameAndId</span>(<span class="pl-smi">ClassLoader</span>
<span class="pl-v">ld</span>) {</td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC400" class="blob-code blob-code-inner
js-file-line"> <span class="pl-smi">String</span> nid <span
class="pl-k">=</span> ld<span class="pl-k">.</span>getName()
<span class="pl-k">!=</span> <span class="pl-c1">null</span>
<span class="pl-k">?</span> <span class="pl-s"><span
class="pl-pds">"</span><span class="pl-cce">\'</span><span
class="pl-pds">"</span></span> <span class="pl-k">+</span>
ld<span class="pl-k">.</span>getName() <span class="pl-k">+</span>
<span class="pl-s"><span class="pl-pds">"</span><span
class="pl-cce">\'</span><span class="pl-pds">"</span></span></td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC401" class="blob-code blob-code-inner
js-file-line"> <span class="pl-k">:</span> ld<span
class="pl-k">.</span>getClass()<span class="pl-k">.</span>getName();</td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC402" class="blob-code blob-code-inner
js-file-line"> <span class="pl-k">if</span> (<span
class="pl-k">!</span>(ld <span class="pl-k">instanceof</span>
<span class="pl-smi">BuiltinClassLoader</span>)) {</td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC403" class="blob-code blob-code-inner
js-file-line"> <span class="pl-smi">String</span> id <span
class="pl-k">=</span> <span class="pl-smi">Integer</span><span
class="pl-k">.</span>toHexString(<span class="pl-smi">System</span><span
class="pl-k">.</span>identityHashCode(ld));</td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC404" class="blob-code blob-code-inner
js-file-line"> nid <span class="pl-k">=</span> nid <span
class="pl-k">+</span> <span class="pl-s"><span
class="pl-pds">"</span> @<span class="pl-pds">"</span></span>
<span class="pl-k">+</span> id;</td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC405" class="blob-code blob-code-inner
js-file-line"> }</td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC406" class="blob-code blob-code-inner
js-file-line"> <span class="pl-k">return</span> nid;</td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC407" class="blob-code blob-code-inner
js-file-line"> }</td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC408" class="blob-code blob-code-inner
js-file-line"> <br>
</td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC409" class="blob-code blob-code-inner
js-file-line"> <span class="pl-c"><span class="pl-c">/**</span></span></td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC410" class="blob-code blob-code-inner
js-file-line"><span class="pl-c"> * Creates a new class
loader of the specified name and using the</span></td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC411" class="blob-code blob-code-inner
js-file-line"><span class="pl-c"> * specified parent class
loader for delegation.</span></td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC412" class="blob-code blob-code-inner
js-file-line"><span class="pl-c"> *</span></td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC413" class="blob-code blob-code-inner
js-file-line"><span class="pl-c"> * <span class="pl-k">@apiNote</span>
If the parent is specified as {<span class="pl-k">@code</span><span
class="pl-c1"> null</span>} (for the</span></td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC414" class="blob-code blob-code-inner
js-file-line"><span class="pl-c"> * bootstrap class
loader) then there is no guarantee that all platform</span></td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC415" class="blob-code blob-code-inner
js-file-line"><span class="pl-c"> * classes are visible.</span></td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC416" class="blob-code blob-code-inner
js-file-line"><span class="pl-c"> *</span></td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC417" class="blob-code blob-code-inner
js-file-line"><span class="pl-c"> * <span class="pl-k">@param</span>
name class loader name; or {<span class="pl-k">@code</span><span
class="pl-c1"> null</span>} if not named</span></td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC418" class="blob-code blob-code-inner
js-file-line"><span class="pl-c"> * <span class="pl-k">@param</span>
parent the parent class loader</span></td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC419" class="blob-code blob-code-inner
js-file-line"><span class="pl-c"> *</span></td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC420" class="blob-code blob-code-inner
js-file-line"><span class="pl-c"> * <span class="pl-k">@throws</span>
IllegalArgumentException if the given name is empty.</span></td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC421" class="blob-code blob-code-inner
js-file-line"><span class="pl-c"> *</span></td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC422" class="blob-code blob-code-inner
js-file-line"><span class="pl-c"> * <span class="pl-k">@throws</span>
SecurityException</span></td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC423" class="blob-code blob-code-inner
js-file-line"><span class="pl-c"> * If a security manager
exists and its</span></td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC424" class="blob-code blob-code-inner
js-file-line"><span class="pl-c"> * {<span class="pl-k">@link</span>
SecurityManager#checkCreateClassLoader()}</span></td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC425" class="blob-code blob-code-inner
js-file-line"><span class="pl-c"> * method doesn't allow
creation of a new class loader.</span></td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC426" class="blob-code blob-code-inner
js-file-line"><span class="pl-c"> *</span></td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC427" class="blob-code blob-code-inner
js-file-line"><span class="pl-c"> * <span class="pl-k">@since</span>
9</span></td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC428" class="blob-code blob-code-inner
js-file-line"><span class="pl-c"> <span class="pl-c">*/</span></span></td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC429" class="blob-code blob-code-inner
js-file-line"> <span class="pl-k">protected</span> <span
class="pl-en">ClassLoader</span>(<span class="pl-smi">String</span>
<span class="pl-v">name</span>, <span class="pl-smi">ClassLoader</span>
<span class="pl-v">parent</span>) {</td>
</tr>
<tr>
</tr>
</tbody>
</table>
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC430" class="blob-code blob-code-inner
js-file-line"> <span class="pl-c1">this</span>(checkCreateClassLoader(name),
name, parent);</td>
</tr>
<tr>
</tr>
</tbody>
</table>
}
<table class="highlight tab-size js-file-line-container"
data-tab-size="8" data-paste-markdown-skip="">
<tbody>
<tr>
<td id="LC363" class="blob-code blob-code-inner
js-file-line"> <span class="pl-k">private</span> <span
class="pl-k">static</span> <span class="pl-smi"><span
class="pl-token"
data-hydro-click="{"event_type":"code_navigation.click_on_symbol","payload":{"action":"click_on_symbol","repository_id":370898673,"ref":"cd8783c08ee18167f15df621e997015b971bfb01","language":"Java","originating_url":"https://github.com/pfirmstone/jdk/blob/cd8783c08ee18167f15df621e997015b971bfb01/src/java.base/share/classes/java/lang/ClassLoader.java","user_id":11625778}}"
data-hydro-click-hmac="aab2699bf8d5b6116760e1b70c1d90c08084c67fd0148bd7203b48443a421d1c">Void</span></span>
<span class="pl-en"><span class="pl-token"
data-hydro-click="{"event_type":"code_navigation.click_on_symbol","payload":{"action":"click_on_symbol","repository_id":370898673,"ref":"cd8783c08ee18167f15df621e997015b971bfb01","language":"Java","originating_url":"https://github.com/pfirmstone/jdk/blob/cd8783c08ee18167f15df621e997015b971bfb01/src/java.base/share/classes/java/lang/ClassLoader.java","user_id":11625778}}"
data-hydro-click-hmac="aab2699bf8d5b6116760e1b70c1d90c08084c67fd0148bd7203b48443a421d1c">checkCreateClassLoader</span></span>(<span
class="pl-smi"><span class="pl-token"
data-hydro-click="{"event_type":"code_navigation.click_on_symbol","payload":{"action":"click_on_symbol","repository_id":370898673,"ref":"cd8783c08ee18167f15df621e997015b971bfb01","language":"Java","originating_url":"https://github.com/pfirmstone/jdk/blob/cd8783c08ee18167f15df621e997015b971bfb01/src/java.base/share/classes/java/lang/ClassLoader.java","user_id":11625778}}"
data-hydro-click-hmac="aab2699bf8d5b6116760e1b70c1d90c08084c67fd0148bd7203b48443a421d1c">String</span></span>
<span class="pl-v">name</span>) {</td>
</tr>
<tr>
</tr>
</tbody>
</table>
</blockquote>
<pre class="moz-signature" cols="72">
</pre>
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