Mercurial > hg > truffle

comparison src/share/vm/runtime/sharedRuntime.cpp @ 14230:b9b6934ad75c

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
8029873: compiler/uncommontrap/TestStackBangRbp.java crashes with SIGSEGV Summary: May end up in uncommon trap blob/deopt blob with unguarded stack Reviewed-by: kvn, twisti
author roland
date Wed, 08 Jan 2014 09:49:31 +0100
parents 22ae97935e05
children 7c0122ed05fb
comparison
equal deleted inserted replaced
14229:d16be2b85802 14230:b9b6934ad75c
492 thread->set_is_method_handle_return(nm->is_method_handle_return(return_address)); 492 thread->set_is_method_handle_return(nm->is_method_handle_return(return_address));
493 // native nmethods don't have exception handlers 493 // native nmethods don't have exception handlers
494 assert(!nm->is_native_method(), "no exception handler"); 494 assert(!nm->is_native_method(), "no exception handler");
495 assert(nm->header_begin() != nm->exception_begin(), "no exception handler"); 495 assert(nm->header_begin() != nm->exception_begin(), "no exception handler");
496 if (nm->is_deopt_pc(return_address)) { 496 if (nm->is_deopt_pc(return_address)) {
497 // If we come here because of a stack overflow, the stack may be
498 // unguarded. Reguard the stack otherwise if we return to the
499 // deopt blob and the stack bang causes a stack overflow we
500 // crash.
501 bool guard_pages_enabled = thread->stack_yellow_zone_enabled();
502 if (!guard_pages_enabled) guard_pages_enabled = thread->reguard_stack();
503 assert(guard_pages_enabled, "stack banging in deopt blob may cause crash");
497 return SharedRuntime::deopt_blob()->unpack_with_exception(); 504 return SharedRuntime::deopt_blob()->unpack_with_exception();
498 } else { 505 } else {
499 return nm->exception_begin(); 506 return nm->exception_begin();
500 } 507 }
501 } 508 }