twisti@1818: /*
trims@1907:  * Copyright (c) 2003, 2007, Oracle and/or its affiliates. All rights reserved.
twisti@1818:  * Copyright 2010 Red Hat, Inc.
twisti@1818:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
twisti@1818:  *
twisti@1818:  * This code is free software; you can redistribute it and/or modify it
twisti@1818:  * under the terms of the GNU General Public License version 2 only, as
twisti@1818:  * published by the Free Software Foundation.
twisti@1818:  *
twisti@1818:  * This code is distributed in the hope that it will be useful, but WITHOUT
twisti@1818:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
twisti@1818:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
twisti@1818:  * version 2 for more details (a copy is included in the LICENSE file that
twisti@1818:  * accompanied this code).
twisti@1818:  *
twisti@1818:  * You should have received a copy of the GNU General Public License version
twisti@1818:  * 2 along with this work; if not, write to the Free Software Foundation,
twisti@1818:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
twisti@1818:  *
trims@1907:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907:  * or visit www.oracle.com if you need additional information or have any
trims@1907:  * questions.
twisti@1818:  *
twisti@1818:  */
twisti@1818: 
twisti@1818: #include "incls/_precompiled.incl"
twisti@1818: #include "incls/_stack_zero.cpp.incl"
twisti@1818: 
twisti@1866: int ZeroStack::suggest_size(Thread *thread) const {
twisti@1866:   assert(needs_setup(), "already set up");
twisti@1866:   return align_size_down(abi_stack_available(thread) / 2, wordSize);
twisti@1866: }
twisti@1866: 
twisti@1818: void ZeroStack::handle_overflow(TRAPS) {
twisti@1818:   JavaThread *thread = (JavaThread *) THREAD;
twisti@1818: 
twisti@1818:   // Set up the frame anchor if it isn't already
twisti@1818:   bool has_last_Java_frame = thread->has_last_Java_frame();
twisti@1818:   if (!has_last_Java_frame) {
twisti@1860:     intptr_t *sp = thread->zero_stack()->sp();
twisti@1818:     ZeroFrame *frame = thread->top_zero_frame();
twisti@1818:     while (frame) {
twisti@1818:       if (frame->is_shark_frame())
twisti@1818:         break;
twisti@1818: 
twisti@1818:       if (frame->is_interpreter_frame()) {
twisti@1818:         interpreterState istate =
twisti@1818:           frame->as_interpreter_frame()->interpreter_state();
twisti@1818:         if (istate->self_link() == istate)
twisti@1818:           break;
twisti@1818:       }
twisti@1818: 
twisti@1860:       sp = ((intptr_t *) frame) + 1;
twisti@1818:       frame = frame->next();
twisti@1818:     }
twisti@1818: 
twisti@1818:     if (frame == NULL)
twisti@1818:       fatal("unrecoverable stack overflow");
twisti@1818: 
twisti@1860:     thread->set_last_Java_frame(frame, sp);
twisti@1818:   }
twisti@1818: 
twisti@1818:   // Throw the exception
twisti@1818:   switch (thread->thread_state()) {
twisti@1818:   case _thread_in_Java:
twisti@1818:     InterpreterRuntime::throw_StackOverflowError(thread);
twisti@1818:     break;
twisti@1818: 
twisti@1818:   case _thread_in_vm:
twisti@1818:     Exceptions::throw_stack_overflow_exception(thread, __FILE__, __LINE__);
twisti@1818:     break;
twisti@1818: 
twisti@1818:   default:
twisti@1818:     ShouldNotReachHere();
twisti@1818:   }
twisti@1818: 
twisti@1818:   // Reset the frame anchor if necessary
twisti@1818:   if (!has_last_Java_frame)
twisti@1818:     thread->reset_last_Java_frame();
twisti@1818: }
twisti@1860: 
twisti@1860: #ifndef PRODUCT
twisti@1860: void ZeroStack::zap(int c) {
twisti@1860:   memset(_base, c, available_words() * wordSize);
twisti@1860: }
twisti@1860: #endif // PRODUCT