| /* |
| * Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved. |
| * Copyright 2007, 2008, 2009, 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. |
| * |
| */ |
| |
| #ifndef OS_CPU_LINUX_ZERO_VM_THREAD_LINUX_ZERO_HPP |
| #define OS_CPU_LINUX_ZERO_VM_THREAD_LINUX_ZERO_HPP |
| |
| private: |
| ZeroStack _zero_stack; |
| ZeroFrame* _top_zero_frame; |
| |
| void pd_initialize() { |
| _top_zero_frame = NULL; |
| } |
| |
| public: |
| ZeroStack *zero_stack() { |
| return &_zero_stack; |
| } |
| |
| public: |
| ZeroFrame *top_zero_frame() { |
| return _top_zero_frame; |
| } |
| void push_zero_frame(ZeroFrame *frame) { |
| *(ZeroFrame **) frame = _top_zero_frame; |
| _top_zero_frame = frame; |
| } |
| void pop_zero_frame() { |
| zero_stack()->set_sp((intptr_t *) _top_zero_frame + 1); |
| _top_zero_frame = *(ZeroFrame **) _top_zero_frame; |
| } |
| |
| public: |
| static ByteSize zero_stack_offset() { |
| return byte_offset_of(JavaThread, _zero_stack); |
| } |
| static ByteSize top_zero_frame_offset() { |
| return byte_offset_of(JavaThread, _top_zero_frame); |
| } |
| |
| public: |
| void record_base_of_stack_pointer() { |
| assert(top_zero_frame() == NULL, "junk on stack prior to Java call"); |
| } |
| void set_base_of_stack_pointer(intptr_t* base_sp) { |
| assert(base_sp == NULL, "should be"); |
| assert(top_zero_frame() == NULL, "junk on stack after Java call"); |
| } |
| |
| public: |
| void set_last_Java_frame() { |
| set_last_Java_frame(top_zero_frame(), zero_stack()->sp()); |
| } |
| void reset_last_Java_frame() { |
| frame_anchor()->zap(); |
| } |
| void set_last_Java_frame(ZeroFrame* fp, intptr_t* sp) { |
| frame_anchor()->set(sp, NULL, fp); |
| } |
| |
| public: |
| ZeroFrame* last_Java_fp() { |
| return frame_anchor()->last_Java_fp(); |
| } |
| |
| private: |
| frame pd_last_frame() { |
| assert(has_last_Java_frame(), "must have last_Java_sp() when suspended"); |
| return frame(last_Java_fp(), last_Java_sp()); |
| } |
| |
| public: |
| static ByteSize last_Java_fp_offset() { |
| return byte_offset_of(JavaThread, _anchor) + |
| JavaFrameAnchor::last_Java_fp_offset(); |
| } |
| |
| public: |
| // Check for pending suspend requests and pending asynchronous |
| // exceptions. There are separate accessors for these, but |
| // _suspend_flags is volatile so using them would be unsafe. |
| bool has_special_condition_for_native_trans() { |
| return _suspend_flags != 0; |
| } |
| |
| public: |
| bool pd_get_top_frame_for_signal_handler(frame* fr_addr, |
| void* ucontext, |
| bool isInJava) { |
| ShouldNotCallThis(); |
| return false; // silence compile warning |
| } |
| |
| // These routines are only used on cpu architectures that |
| // have separate register stacks (Itanium). |
| static bool register_stack_overflow() { return false; } |
| static void enable_register_stack_guard() {} |
| static void disable_register_stack_guard() {} |
| |
| #endif // OS_CPU_LINUX_ZERO_VM_THREAD_LINUX_ZERO_HPP |