123 lines
3.7 KiB
C++
123 lines
3.7 KiB
C++
/*
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* Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.
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* Copyright 2007, 2008, 2009, 2010 Red Hat, Inc.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#ifndef OS_CPU_LINUX_ZERO_VM_THREAD_LINUX_ZERO_HPP
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#define OS_CPU_LINUX_ZERO_VM_THREAD_LINUX_ZERO_HPP
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private:
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ZeroStack _zero_stack;
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ZeroFrame* _top_zero_frame;
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void pd_initialize() {
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_top_zero_frame = NULL;
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}
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public:
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ZeroStack *zero_stack() {
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return &_zero_stack;
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}
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public:
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ZeroFrame *top_zero_frame() {
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return _top_zero_frame;
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}
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void push_zero_frame(ZeroFrame *frame) {
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*(ZeroFrame **) frame = _top_zero_frame;
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_top_zero_frame = frame;
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}
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void pop_zero_frame() {
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zero_stack()->set_sp((intptr_t *) _top_zero_frame + 1);
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_top_zero_frame = *(ZeroFrame **) _top_zero_frame;
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}
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public:
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static ByteSize zero_stack_offset() {
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return byte_offset_of(JavaThread, _zero_stack);
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}
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static ByteSize top_zero_frame_offset() {
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return byte_offset_of(JavaThread, _top_zero_frame);
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}
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public:
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void record_base_of_stack_pointer() {
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assert(top_zero_frame() == NULL, "junk on stack prior to Java call");
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}
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void set_base_of_stack_pointer(intptr_t* base_sp) {
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assert(base_sp == NULL, "should be");
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assert(top_zero_frame() == NULL, "junk on stack after Java call");
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}
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public:
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void set_last_Java_frame() {
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set_last_Java_frame(top_zero_frame(), zero_stack()->sp());
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}
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void reset_last_Java_frame() {
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frame_anchor()->zap();
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}
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void set_last_Java_frame(ZeroFrame* fp, intptr_t* sp) {
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frame_anchor()->set(sp, NULL, fp);
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}
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public:
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ZeroFrame* last_Java_fp() {
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return frame_anchor()->last_Java_fp();
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}
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private:
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frame pd_last_frame() {
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assert(has_last_Java_frame(), "must have last_Java_sp() when suspended");
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return frame(last_Java_fp(), last_Java_sp());
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}
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public:
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static ByteSize last_Java_fp_offset() {
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return byte_offset_of(JavaThread, _anchor) +
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JavaFrameAnchor::last_Java_fp_offset();
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}
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public:
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// Check for pending suspend requests and pending asynchronous
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// exceptions. There are separate accessors for these, but
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// _suspend_flags is volatile so using them would be unsafe.
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bool has_special_condition_for_native_trans() {
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return _suspend_flags != 0;
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}
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public:
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bool pd_get_top_frame_for_signal_handler(frame* fr_addr,
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void* ucontext,
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bool isInJava) {
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ShouldNotCallThis();
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return false; // silence compile warning
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}
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// These routines are only used on cpu architectures that
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// have separate register stacks (Itanium).
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static bool register_stack_overflow() { return false; }
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static void enable_register_stack_guard() {}
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static void disable_register_stack_guard() {}
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#endif // OS_CPU_LINUX_ZERO_VM_THREAD_LINUX_ZERO_HPP
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