1 /* 2 * Copyright 2003-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 21 * CA 95054 USA or visit www.sun.com if you need additional information or 22 * have any questions. 23 * 24 */ 25 26 #include "incls/_precompiled.incl" 27 #include "incls/_stack_zero.cpp.incl" 28 29 void ZeroStack::handle_overflow(TRAPS) { 30 JavaThread *thread = (JavaThread *) THREAD; 31 32 // Set up the frame anchor if it isn't already 33 bool has_last_Java_frame = thread->has_last_Java_frame(); 34 if (!has_last_Java_frame) { 35 intptr_t *sp = thread->zero_stack()->sp(); 36 ZeroFrame *frame = thread->top_zero_frame(); 37 while (frame) { 38 if (frame->is_shark_frame()) 39 break; 40 41 if (frame->is_interpreter_frame()) { 42 interpreterState istate = 43 frame->as_interpreter_frame()->interpreter_state(); 44 if (istate->self_link() == istate) 45 break; 46 } 47 48 sp = ((intptr_t *) frame) + 1; 49 frame = frame->next(); 50 } 51 52 if (frame == NULL) 53 fatal("unrecoverable stack overflow"); 54 55 thread->set_last_Java_frame(frame, sp); 56 } 57 58 // Throw the exception 59 switch (thread->thread_state()) { 60 case _thread_in_Java: 61 InterpreterRuntime::throw_StackOverflowError(thread); 62 break; 63 64 case _thread_in_vm: 65 Exceptions::throw_stack_overflow_exception(thread, __FILE__, __LINE__); 66 break; 67 68 default: 69 ShouldNotReachHere(); 70 } 71 72 // Reset the frame anchor if necessary 73 if (!has_last_Java_frame) 74 thread->reset_last_Java_frame(); 75 } 76 77 #ifndef PRODUCT 78 void ZeroStack::zap(int c) { 79 memset(_base, c, available_words() * wordSize); 80 } 81 #endif // PRODUCT