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From Egor Pasko <egor.pa...@gmail.com>
Subject Re: [drlvm] Trouble Building DRLVM
Date Tue, 26 Sep 2006 08:08:18 GMT
On the 0x1EF day of Apache Harmony Geir Magnusson, Jr. wrote:
> Egor Pasko wrote:
> >>
> >> If invoked with the option "-Xtrace:em", DRLVM prints compilation
> >> events as soon as they occur. What makes real fun is that one method
> >> starts compilation several times (without success) and receives
> >> SEGFAULT after not so many attempts. The bug may be in OPT or in
> >> recompilation, not clear now. Will investigate (first, I'll try to
> >> compile some methods with JET selectively)
> > 
> > the bug is caused by OPT's incorrect compilation of method
> > test_getPackages_V if I move the compilation to JET, the test
> > passes. Investigating...
> > 
> > Moving compilation of _one_ method to JET, while _others_ are compiled
> > with OPT *is easy*. All you have to do is put debug.emconf file to
> > .../jre/bin/default and run with the option -Xem:debug
> 
> This is *really* cool.  (Of course, I assume a patch is forthcoming to
> fix OPT :)

thanks. I am far from understanding what happens, maybe it's not OPT,
who is guilty. I guess, the failure occurs from within a stub code in
some strange circumstances.. Trying to reduce the test as well as the
number of optimizations that OPT performs.

> We should capture this in a FAQ...

OK, I am taking this job. Time to get along with website :)

> geir
> 
> > 
> > debug.emconf is as follows:
> > ========================================================================
> > chains=chain1,chain2
> > chain1.jits=JET_DEBUG
> > chain2.jits=CD_OPT
> > 
> > chain1.filter=+::test_getPackages_V
> > chain1.filter=-
> > 
> > JET_DEBUG.file=jitrino
> > CD_OPT.file=jitrino
> > 
> > # Options to be passed to JIT
> > 
> > -Djit.JET_DEBUG.path=
> > 
> > -Djit.CD_OPT.path=opt_init,translator,optimizer,hir2lir,codegen
> > 
> > -Djit.CD_OPT.path.optimizer=ssa,devirt,inline,purge,simplify,uce,dce,lazyexc,memopt,simplify,uce,dce,lower,dessa,statprof,markglobals
> > -Djit.CD_OPT.path.codegen=lock_method,bbp,gcpoints,cafl,dce1,i8l,early_prop,itrace-,native,constraints,dce2,regalloc,spillgen,layout,copy,rce+,stack,break-,iprof-,emitter!,si_insts,gcmap,info,unlock_method
> > -Djit.CD_OPT.path.dce1=cg_dce
> > -Djit.CD_OPT.path.dce2=cg_dce
> > -Djit.CD_OPT.path.regalloc=bp_regalloc1,bp_regalloc2
> > -Djit.CD_OPT.path.bp_regalloc1=bp_regalloc
> > -Djit.CD_OPT.path.bp_regalloc2=bp_regalloc
> > 
> > #inliner configuration
> > -Djit.CD_OPT.CD_OPT_inliner_pipeline.filter=-
> > -Djit.CD_OPT.CD_OPT_inliner_pipeline.path=ssa,devirt
> > -Djit.CD_OPT.arg.optimizer.inline.pipeline=CD_OPT_inliner_pipeline
> > 
> > -Djit.CD_OPT.arg.codegen.dce1.early=yes
> > -Djit.CD_OPT.arg.codegen.regalloc.bp_regalloc1.regs=ALL_GP
> > -Djit.CD_OPT.arg.codegen.regalloc.bp_regalloc2.regs=ALL_XMM
> > ========================================================================
> > 
> 
> 
> ---------------------------------------------------------------------
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> 
> 

-- 
Egor Pasko, Intel Managed Runtime Division


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