<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type">
</head>
<body bgcolor="#ffffff" text="#000000">
<br>
<br>
On 11/18/10 09:19, Brain Damage wrote:
<blockquote cite="mid:551909.83135.qm@web112320.mail.gq1.yahoo.com"
type="cite">
<style type="text/css"><!-- DIV {margin:0px;} --></style>
<div
style="font-family: 'times new roman','new york',times,serif; font-size: 12pt;">
<div>Hello,</div>
<div> </div>
<div>I am trying to do some modifications in the allocation process
of 'external' objects i.e. objects allocated using 'new' by any java
program.</div>
<div>As written in the whitepaper, JVM employs the fast allocation or
'Bump a pointer' technique for allocating external objects.</div>
<div><br>
</div>
<div>I am not able to find the entry point of the 'new' keyword i.e.
what functions are called when it sees the new keyword in a java
program.</div>
<div>My initial suspect was JRT_ENTRY(...) macro in the runtime.cpp
file, where they have matched 'new_instance_java' with
'new_instance_C'.</div>
<div>I tried to follow the functions called by this macro i.e.
instanceKlass::cast(klass)->allocate_instance(THREAD);</div>
<div>Although it did take me to some object allocation but I am not
sure if this is the process used to allocate java objects.</div>
<div>It seems this process is used by the JVM to allocate it's
internal runtime objects to build the environment.</div>
</div>
</blockquote>
<br>
I think you have actually found the code that you are seeking. Follow
the calls<br>
from allocate_instance() down to
CollectedHeap::common_mem_allocate_noinit()<br>
and in that method look at CollectedHeap::allocate_from_tlab() for the
"bump"<br>
allocation.<br>
<blockquote cite="mid:551909.83135.qm@web112320.mail.gq1.yahoo.com"
type="cite">
<div
style="font-family: 'times new roman','new york',times,serif; font-size: 12pt;">
<div><br>
</div>
<div>I don't know a whole lot about jvm, this is just what I could
make out by looking at the code.</div>
<div><br>
</div>
<div>Please help me find the definition new.</div>
<div><br>
</div>
<div>Thanks,</div>
<div><br>
</div>
<div>Yogesh </div>
</div>
<br>
</blockquote>
</body>
</html>