1/* 2 * Copyright (c) 2003, 2016, Oracle and/or its affiliates. All rights reserved. 3 * Copyright 2010 Red Hat, Inc. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 * 24 */ 25 26#include "precompiled.hpp" 27#include "interpreter/interpreterRuntime.hpp" 28#include "runtime/thread.hpp" 29#include "stack_zero.hpp" 30#include "stack_zero.inline.hpp" 31 32// Inlined causes circular inclusion with thread.hpp 33ZeroStack::ZeroStack() 34 : _base(NULL), _top(NULL), _sp(NULL) { 35 _shadow_pages_size = JavaThread::stack_shadow_zone_size(); 36 } 37 38int ZeroStack::suggest_size(Thread *thread) const { 39 assert(needs_setup(), "already set up"); 40 int abi_available = abi_stack_available(thread); 41 assert(abi_available >= 0, "available abi stack must be >= 0"); 42 return align_size_down(abi_available / 2, wordSize); 43} 44 45void ZeroStack::handle_overflow(TRAPS) { 46 JavaThread *thread = (JavaThread *) THREAD; 47 48 // Set up the frame anchor if it isn't already 49 bool has_last_Java_frame = thread->has_last_Java_frame(); 50 if (!has_last_Java_frame) { 51 intptr_t *sp = thread->zero_stack()->sp(); 52 ZeroFrame *frame = thread->top_zero_frame(); 53 while (frame) { 54 if (frame->is_shark_frame()) 55 break; 56 57 if (frame->is_interpreter_frame()) { 58 interpreterState istate = 59 frame->as_interpreter_frame()->interpreter_state(); 60 if (istate->self_link() == istate) 61 break; 62 } 63 64 sp = ((intptr_t *) frame) + 1; 65 frame = frame->next(); 66 } 67 68 if (frame == NULL) 69 fatal("unrecoverable stack overflow"); 70 71 thread->set_last_Java_frame(frame, sp); 72 } 73 74 // Throw the exception 75 switch (thread->thread_state()) { 76 case _thread_in_Java: 77 InterpreterRuntime::throw_StackOverflowError(thread); 78 break; 79 80 case _thread_in_vm: 81 Exceptions::throw_stack_overflow_exception(thread, __FILE__, __LINE__, 82 methodHandle()); 83 break; 84 85 default: 86 ShouldNotReachHere(); 87 } 88 89 // Reset the frame anchor if necessary 90 if (!has_last_Java_frame) 91 thread->reset_last_Java_frame(); 92} 93 94#ifndef PRODUCT 95void ZeroStack::zap(int c) { 96 memset(_base, c, available_words() * wordSize); 97} 98#endif // PRODUCT 99