| /* |
| * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved. |
| * Copyright 2010 Red Hat, Inc. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #include "precompiled.hpp" |
| #include "interpreter/interpreterRuntime.hpp" |
| #include "stack_zero.hpp" |
| #include "stack_zero.inline.hpp" |
| |
| int ZeroStack::suggest_size(Thread *thread) const { |
| assert(needs_setup(), "already set up"); |
| int abi_available = abi_stack_available(thread); |
| assert(abi_available >= 0, "available abi stack must be >= 0"); |
| return align_size_down(abi_available / 2, wordSize); |
| } |
| |
| void ZeroStack::handle_overflow(TRAPS) { |
| JavaThread *thread = (JavaThread *) THREAD; |
| |
| // Set up the frame anchor if it isn't already |
| bool has_last_Java_frame = thread->has_last_Java_frame(); |
| if (!has_last_Java_frame) { |
| intptr_t *sp = thread->zero_stack()->sp(); |
| ZeroFrame *frame = thread->top_zero_frame(); |
| while (frame) { |
| if (frame->is_shark_frame()) |
| break; |
| |
| if (frame->is_interpreter_frame()) { |
| interpreterState istate = |
| frame->as_interpreter_frame()->interpreter_state(); |
| if (istate->self_link() == istate) |
| break; |
| } |
| |
| sp = ((intptr_t *) frame) + 1; |
| frame = frame->next(); |
| } |
| |
| if (frame == NULL) |
| fatal("unrecoverable stack overflow"); |
| |
| thread->set_last_Java_frame(frame, sp); |
| } |
| |
| // Throw the exception |
| switch (thread->thread_state()) { |
| case _thread_in_Java: |
| InterpreterRuntime::throw_StackOverflowError(thread); |
| break; |
| |
| case _thread_in_vm: |
| Exceptions::throw_stack_overflow_exception(thread, __FILE__, __LINE__, |
| methodHandle()); |
| break; |
| |
| default: |
| ShouldNotReachHere(); |
| } |
| |
| // Reset the frame anchor if necessary |
| if (!has_last_Java_frame) |
| thread->reset_last_Java_frame(); |
| } |
| |
| #ifndef PRODUCT |
| void ZeroStack::zap(int c) { |
| memset(_base, c, available_words() * wordSize); |
| } |
| #endif // PRODUCT |