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From: Per Bothner <>
To: Kay Zheng <>, Kawa mailing list <>
Subject: Re: The "--no-inline" option caused Kawa to generate invalid bytecode
Date: Tue, 05 Sep 2017 03:28:00 -0000	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

On 09/04/2017 03:25 AM, Kay Zheng wrote:
> Hi Per,
> I think I hit a bug regarding "(define-early-constant ...)" and the
> "--no-inline" option.

I was able to reproduce the problem.

> I then disassembled kawa-test.class (the result is appended at the end
> of this email), and found that there was a "aload_0" instruction in
> the static initialization block. I'm not familiar with the JVM, but
> search results said the instruction was to read the argument array,
> yet there was no argument list for the static initialization block at
> all.

aload_0 does not necessarily means to read the argument array.
It means to push the contents of local variable 0 (which must
be a reference to an object or null) onto the operand stack.
The first few local variables are commonly used for parameters,
but <clinit> takes no parameters, not even the implicit 'this'.

In this case I'm guessing a bug in the Compilation.loadCallContext method.
	--Per Bothner

  reply	other threads:[~2017-09-05  3:28 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-09-04 10:25 Kay Zheng
2017-09-05  3:28 ` Per Bothner [this message]
2017-09-05 16:51   ` Kay Zheng
2017-10-05  6:29 ` Per Bothner

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