[Nestedvm] constant pool full

Bertram, Alexander alex at bedatadriven.com
Wed Jun 16 15:07:00 EDT 2010

I believe this error refers to something different than the 64k instruction
limit, but rather some sort of internal constant (literal) pool.

I received the same error on my build and was able to work around it with
the -lessconstants flag when executing the compiler.

I confess that I actually don't know what this flag does other than produce
less (fewer) constants :-)


On Wed, Jun 16, 2010 at 8:56 PM, David Ehrmann <ehrmann at gmail.com> wrote:

> I was able to get something non-trivial to cross compile, but when I ran
> NestedVM on it, I got this exception:
> java org.ibex.nestedvm.Compiler -outfile Test.class Test test.mips
> org.ibex.classgen.ClassFile$Exn: constant pool full
>   at org.ibex.classgen.ConstantPool.add(ConstantPool.java:247)
>   at org.ibex.classgen.MethodGen.finish(MethodGen.java:604)
>   at org.ibex.classgen.ClassFile._dump(ClassFile.java:169)
>   at org.ibex.classgen.ClassFile.dump(ClassFile.java:160)
>   at
> org.ibex.nestedvm.ClassFileCompiler.__go(ClassFileCompiler.java:380)
>   at
> org.ibex.nestedvm.ClassFileCompiler._go(ClassFileCompiler.java:72)
>   at org.ibex.nestedvm.Compiler.go(Compiler.java:259)
>   at org.ibex.nestedvm.Compiler.main(Compiler.java:183)
> Compiler Error: Class generation exception:
> org.ibex.classgen.ClassFile$Exn:
> constant pool full
> I googled a bit and found that it's been hit before, and there's not really
> a workaround.  The difference is that that code used several libraries,
> mine
> uses just the standard ones.  When I ran nm on it, it only had 4325
> lines of output (I assume it's one line per symbol)--far from the 64k
> limit.
> I put a System.out.println at ClassFileCompiler.java:179, and symbols only
> has ~4325 elements.
> Any ideas?
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