binary sizes

[Andrew Haley <aph at redhat dot com>]

Adam Megacz writes:
 > 
 > 
 > Question: I assume that eh_frame is DWARF2 stack-unwinding data,
 > right?  Is it really supposed to consume 20% of the binary?

Yes.

 > Would switching to sjlj get me back that space (at the price of
 > poorer try/catch entry performance)?

Perhaps, but we're moving to removing the traditional stack chain by
compiling with omit-frame-pointer: once that move is complete, DWARF2
unwinder data will be needed everywhere.

 > Another question: does the GNU linker merge indentical read-only
 > sections on x86?  Is GCJ marking all of its Utf8 sections
 > read-only?  Also, I can't really think of much read-write static
 > data that should be in a gcj binary... especially not 750k
 > worth... what's in .data?

I don't know what all this stuff is.  Much of it is probably
reflection data, most of which shold be read only.

 > Last question: can anybody think of a quick hack to let me get rid
 > of reflection metadata?  My app doesn't use reflection at all,
 > although I seem to remember natClass.cc and natClassLoader.cc doing
 > a lot of reflection (bummer).

Some of the reflection data is used by the gc.  You can remove most of
it, though.  You'll have to experiment.

Andrew.