SHORT SUMMARY:

HotSpot VM crashed during register allocation phase on C2 compiler thread
when compiling some kind of java methods.

INDICATORS:

The stack trace from hs_err log indicated the crash occurred during register
allocation.

 Stack: [0x00007f0d2638c000,0x00007f0d2648d000], sp=0x00007f0d26488980,
free space=1010k
 Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native
code)
 V [libjvm.so+0x6995cd] MachNode::in_RegMask(unsigned int) const+0x3d
 V [libjvm.so+0x345325] PhaseChaitin::gather_lrg_masks(bool)+0x425
 V [libjvm.so+0x347b9f] PhaseChaitin::Register_Allocate()+0x26f
 V [libjvm.so+0x3ba24d] Compile::Code_Gen()+0x3ad
 V [libjvm.so+0x3bce55] Compile::Compile(ciEnv*, C2Compiler*, ciMethod*,
int, bool, bool)+0xe15
 V [libjvm.so+0x32eb62] C2Compiler::compile_method(ciEnv*, ciMethod*,
int)+0x142
 V [libjvm.so+0x3c1d73]
CompileBroker::invoke_compiler_on_method(CompileTask*)+0x323
 V [libjvm.so+0x3c2edd] CompileBroker::compiler_thread_loop()+0x43d
 V [libjvm.so+0x8650c8] JavaThread::thread_main_inner()+0xc8
 V [libjvm.so+0x865218] JavaThread::run()+0x138
 V [libjvm.so+0x746c00] java_start(Thread*)+0x100

COUNTER INDICATORS:

None

TRIGGERS:

The crash always occurs when HotSpot VM compiles some kind of java methods.

KNOWN WORKAROUND:

Give -XX:CompileCommand=exclude,<class,method> option for each java method
causing a crash.

PRESENT SINCE:

7u6

HOW TO VERIFY:

No in-house reproducer. Need to be verified by the customer.

NOTES FOR SE:

None

REGRESSION:

No