442     if (sig == SIGSEGV && info->si_code == SEGV_ACCERR) {
 443       address addr = (address) info->si_addr;
 444       if (thread->in_stack_yellow_zone(addr)) {
 445         thread->disable_stack_yellow_zone();
 446         if (thread->thread_state() == _thread_in_Java) {
 447           // Throw a stack overflow exception.  Guard pages will be reenabled
 448           // while unwinding the stack.
 449           stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW);
 450         } else {
 451           // Thread was in the vm or native code.  Return and try to finish.
 452           return true;
 453         }
 454       } else if (thread->in_stack_red_zone(addr)) {
 455         // Fatal red zone violation.  Disable the guard pages and fall through
 456         // to handle_unexpected_exception way down below.
 457         thread->disable_stack_red_zone();
 458         tty->print_raw_cr("An irrecoverable stack overflow has occurred.");
 459       }
 460     }
 461 





 462     if (thread->thread_state() == _thread_in_vm) {
 463       if (sig == SIGBUS && info->si_code == BUS_OBJERR && thread->doing_unsafe_access()) {
 464         stub = StubRoutines::handler_for_unsafe_access();
 465       }
 466     }
 467 
 468     if (thread->thread_state() == _thread_in_Java) {
 469       // Support Safepoint Polling
 470       if ( sig == SIGSEGV && os::is_poll_address((address)info->si_addr)) {
 471         stub = SharedRuntime::get_poll_stub(pc);
 472       }
 473       else if (sig == SIGBUS && info->si_code == BUS_OBJERR) {
 474         // BugId 4454115: A read from a MappedByteBuffer can fault
 475         // here if the underlying file has been truncated.
 476         // Do not crash the VM in such a case.
 477         CodeBlob* cb = CodeCache::find_blob_unsafe(pc);
 478         if (cb != NULL) {
 479           nmethod* nm = cb->is_nmethod() ? (nmethod*)cb : NULL;
 480           if (nm != NULL && nm->has_unsafe_access()) {
 481             stub = StubRoutines::handler_for_unsafe_access();

 442     if (sig == SIGSEGV && info->si_code == SEGV_ACCERR) {
 443       address addr = (address) info->si_addr;
 444       if (thread->in_stack_yellow_zone(addr)) {
 445         thread->disable_stack_yellow_zone();
 446         if (thread->thread_state() == _thread_in_Java) {
 447           // Throw a stack overflow exception.  Guard pages will be reenabled
 448           // while unwinding the stack.
 449           stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW);
 450         } else {
 451           // Thread was in the vm or native code.  Return and try to finish.
 452           return true;
 453         }
 454       } else if (thread->in_stack_red_zone(addr)) {
 455         // Fatal red zone violation.  Disable the guard pages and fall through
 456         // to handle_unexpected_exception way down below.
 457         thread->disable_stack_red_zone();
 458         tty->print_raw_cr("An irrecoverable stack overflow has occurred.");
 459       }
 460     }
 461 
 462     if ((sig == SIGSEGV) && VM_Version::is_cpuinfo_segv_addr(pc)) {
 463       // Verify that OS save/restore AVX registers.
 464       stub = VM_Version::cpuinfo_cont_addr();
 465     }
 466 
 467     if (thread->thread_state() == _thread_in_vm) {
 468       if (sig == SIGBUS && info->si_code == BUS_OBJERR && thread->doing_unsafe_access()) {
 469         stub = StubRoutines::handler_for_unsafe_access();
 470       }
 471     }
 472 
 473     if (thread->thread_state() == _thread_in_Java) {
 474       // Support Safepoint Polling
 475       if ( sig == SIGSEGV && os::is_poll_address((address)info->si_addr)) {
 476         stub = SharedRuntime::get_poll_stub(pc);
 477       }
 478       else if (sig == SIGBUS && info->si_code == BUS_OBJERR) {
 479         // BugId 4454115: A read from a MappedByteBuffer can fault
 480         // here if the underlying file has been truncated.
 481         // Do not crash the VM in such a case.
 482         CodeBlob* cb = CodeCache::find_blob_unsafe(pc);
 483         if (cb != NULL) {
 484           nmethod* nm = cb->is_nmethod() ? (nmethod*)cb : NULL;
 485           if (nm != NULL && nm->has_unsafe_access()) {
 486             stub = StubRoutines::handler_for_unsafe_access();