JDK-6529019 : C2 CTW on sparc with -XX:+VerifyOops assert(is_Mach(),"invalid node class")
- Type: Bug
- Component: hotspot
- Sub-Component: compiler
- Affected Version: 7
- Priority: P4
- Status: Resolved
- Resolution: Fixed
- OS: solaris_9
- CPU: sparc
- Submitted: 2007-02-27
- Updated: 2010-04-03
- Resolved: 2007-03-15
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Unresolved : Release in which this issue/RFE will be addressed.
Resolved: Release in which this issue/RFE has been resolved.
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| JDK 6 | JDK 7 | Other |
|---|---|---|
6u4Fixed  |
7Fixed |
hs10Fixed |
Description
I got next C2 CTW failure on sparc.
gamma -XX:+VerifyOops -Xss4m -Xverify:all -XX:-ShowMessageBoxOnError -XX:+CompileTheWorld -XX:CompileTheWorldStartAt=2000 -Xbootclasspath/p:/export/home/work/CTW/jarfiles/testbase.jar
...
CompileTheWorld (2041) : inline001_1
CompileTheWorld (2042) : inline002
#
# An unexpected error has been detected by Java Runtime Environment:
#
# Internal Error (/net/prt-solsparc-q1-19/tmp/PrtBuildDir/workspace/src/share/vm/opto/node.hpp, 676 [ Patched ]), pid=11392, tid=9
#
# Java VM: Java HotSpot(TM) Server VM (20070222204237.kvn.6523674-fastdebug mixed mode)
#
# Error: assert(is_Mach(),"invalid node class")
In Line 219 since 'vv' is Phi node:
217 if( vv == val || // Got a direct hit?
218 (t && vv && vv->bottom_type() == t &&
219 vv->as_Mach()->rule() == val->as_Mach()->rule()) ) { // Or same constant?
220 assert( !n->is_Phi(), "cannot change registers at a Phi so easily" );
221 if( OptoReg::is_stack(nk_reg) || // CISC-loading from stack OR
222 OptoReg::is_reg(reg) || // turning into a register use OR
223 regnd[reg]->outcnt()==1 ) { // last use of a spill-load turns into a CISC use
224 blk_adjust += use_prior_register(n,k,regnd[reg],current_block,value,regnd);
225 if( n->in(k) == regnd[reg] ) // Success! Quit trying
226 return blk_adjust;
[t@9 l@9]: print vv->dump(2)
6562 Region === 6562 34000 33999 [[ 6562 6551 6565 6566 41301 ]] !jvms: inline002::runFinals @ bci:2130
41296 MachSpillCopy === _ 45605 [[ 41301 ]]
44816 MachSpillCopy === _ 45604 [[ 41301 ]]
41301 Phi === 6562 41296 44816 [[ 45330 45331 45332 45333 45334 45335 45336 45337 45338 45339 45340 45341 45342 45343 45344 45345 45346 45347 45348 45349 45350 45351 45352 45353 45354 45355 45356 45357 45358 45359 45360 45361 45362 45363 45364 45365 45600 41467 45366 45367 45368 45369 45370 45371 45372 45373 45374 45375 41468 45597 45596 45573 45574 45575 45576 45579 45580 45581 45582 45583 45586 45587 45588 45589 45590 45593 45594 45595 ]] #dblcon:0.000000
The graph looks like this:
loadConD #0.0
|
V
MachSpillCopy
/ | | | | | | \ ( a lot uses)
| |
V V
MachSpillCopy MachSpillCopy
\ /
\ /
Phi
/ | | \ ( a lot uses, all are MachSpillCopy)
Comments
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