321 "enabled executable stack (see man page execstack(8))");
322 } else {
323 // Accessing stack address below sp may cause SEGV if current
324 // thread has MAP_GROWSDOWN stack. This should only happen when
325 // current thread was created by user code with MAP_GROWSDOWN flag
326 // and then attached to VM. See notes in os_linux.cpp.
327 if (thread->osthread()->expanding_stack() == 0) {
328 thread->osthread()->set_expanding_stack();
329 if (os::Linux::manually_expand_stack(thread, addr)) {
330 thread->osthread()->clear_expanding_stack();
331 return 1;
332 }
333 thread->osthread()->clear_expanding_stack();
334 } else {
335 fatal("recursive segv. expanding stack.");
336 }
337 }
338 }
339 }
340
341 if (thread->thread_state() == _thread_in_Java) {
342 // Java thread running in Java code => find exception handler if any
343 // a fault inside compiled code, the interpreter, or a stub
344
345 if (sig == SIGSEGV && os::is_poll_address((address)info->si_addr)) {
346 stub = SharedRuntime::get_poll_stub(pc);
347 } else if (sig == SIGBUS /* && info->si_code == BUS_OBJERR */) {
348 // BugId 4454115: A read from a MappedByteBuffer can fault
349 // here if the underlying file has been truncated.
350 // Do not crash the VM in such a case.
351 CodeBlob* cb = CodeCache::find_blob_unsafe(pc);
352 nmethod* nm = (cb != NULL && cb->is_nmethod()) ? (nmethod*)cb : NULL;
353 if (nm != NULL && nm->has_unsafe_access()) {
354 stub = StubRoutines::handler_for_unsafe_access();
355 }
356 }
357 else
358
359 #ifdef AMD64
360 if (sig == SIGFPE &&
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321 "enabled executable stack (see man page execstack(8))");
322 } else {
323 // Accessing stack address below sp may cause SEGV if current
324 // thread has MAP_GROWSDOWN stack. This should only happen when
325 // current thread was created by user code with MAP_GROWSDOWN flag
326 // and then attached to VM. See notes in os_linux.cpp.
327 if (thread->osthread()->expanding_stack() == 0) {
328 thread->osthread()->set_expanding_stack();
329 if (os::Linux::manually_expand_stack(thread, addr)) {
330 thread->osthread()->clear_expanding_stack();
331 return 1;
332 }
333 thread->osthread()->clear_expanding_stack();
334 } else {
335 fatal("recursive segv. expanding stack.");
336 }
337 }
338 }
339 }
340
341 if ((sig == SIGSEGV) && VM_Version::is_cpuinfo_segv_addr(pc)) {
342 // Verify that OS save/restore AVX registers.
343 stub = VM_Version::cpuinfo_cont_addr();
344 }
345
346 if (thread->thread_state() == _thread_in_Java) {
347 // Java thread running in Java code => find exception handler if any
348 // a fault inside compiled code, the interpreter, or a stub
349
350 if (sig == SIGSEGV && os::is_poll_address((address)info->si_addr)) {
351 stub = SharedRuntime::get_poll_stub(pc);
352 } else if (sig == SIGBUS /* && info->si_code == BUS_OBJERR */) {
353 // BugId 4454115: A read from a MappedByteBuffer can fault
354 // here if the underlying file has been truncated.
355 // Do not crash the VM in such a case.
356 CodeBlob* cb = CodeCache::find_blob_unsafe(pc);
357 nmethod* nm = (cb != NULL && cb->is_nmethod()) ? (nmethod*)cb : NULL;
358 if (nm != NULL && nm->has_unsafe_access()) {
359 stub = StubRoutines::handler_for_unsafe_access();
360 }
361 }
362 else
363
364 #ifdef AMD64
365 if (sig == SIGFPE &&
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