Re: Source code for Exception Class and RuntimeException Class

From:

Joshua Cranmer <Pidgeot18@verizon.invalid>

Newsgroups:

comp.lang.java.programmer

Date:

Sat, 23 Aug 2008 16:27:47 -0400

Message-ID:

<g8prsf$4uc$1@news-int2.gatech.edu>

ankur wrote:

In Throwable.java I can see the signature for
public synchronized native Throwable fillInStackTrace();
where do I find its implementation ?

It's native, so its source is in the source of the actual JVM.

This is the source of the bridge for JDK 7:
<http://hg.openjdk.java.net/jdk7/jdk7/jdk/file/tip/src/share/native/java/lang/Throwable.c>

The method seems to come from here (line 402):
<http://hg.openjdk.java.net/jdk7/jdk7/hotspot/file/tip/src/share/vm/prims/jvm.cpp>

At that point, I'd say it's best to basically open stuff up in gdb (C++
debugger) to try to follow what's going on, since I've perplexed myself,
and following code through several separate hg trees is becoming an
exercise in pain.

Ditto for this method:
private native StackTraceElement getStackTraceElement(int index);

Roughly, ditto.

At this point, however, you're delving deep into the structure of the
JVM--as is the case for much of java.lang and its subpackages.

--
Beware of bugs in the above code; I have only proved it correct, not
tried it. -- Donald E. Knuth