author | stefank |
Wed, 05 Jul 2017 11:33:17 +0200 | |
changeset 46625 | edefffab74e2 |
parent 46619 | a3919f5e8d2b |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2003, 2016, Oracle and/or its affiliates. All rights reserved. |
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* Copyright 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 CPU_ZERO_VM_STACK_ZERO_HPP |
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#define CPU_ZERO_VM_STACK_ZERO_HPP |
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#include "utilities/align.hpp" |
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#include "utilities/sizes.hpp" |
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class ZeroStack { |
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private: |
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intptr_t *_base; // the last available word |
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intptr_t *_top; // the word past the end of the stack |
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intptr_t *_sp; // the top word on the stack |
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private: |
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int _shadow_pages_size; // how much ABI stack must we keep free? |
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public: |
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ZeroStack(); |
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bool needs_setup() const { |
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return _base == NULL; |
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} |
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int suggest_size(Thread *thread) const; |
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void setup(void *mem, size_t size) { |
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assert(needs_setup(), "already set up"); |
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assert(!(size & WordAlignmentMask), "unaligned"); |
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_base = (intptr_t *) mem; |
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_top = _base + (size >> LogBytesPerWord); |
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_sp = _top; |
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} |
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void teardown() { |
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assert(!needs_setup(), "not set up"); |
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assert(_sp == _top, "stuff on stack at teardown"); |
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_base = NULL; |
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_top = NULL; |
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_sp = NULL; |
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} |
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intptr_t *sp() const { |
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return _sp; |
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} |
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void set_sp(intptr_t *new_sp) { |
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assert(_top >= new_sp && new_sp >= _base, "bad stack pointer"); |
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_sp = new_sp; |
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} |
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int total_words() const { |
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return _top - _base; |
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} |
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int available_words() const { |
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return _sp - _base; |
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} |
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void push(intptr_t value) { |
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assert(_sp > _base, "stack overflow"); |
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*(--_sp) = value; |
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} |
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intptr_t pop() { |
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assert(_sp < _top, "stack underflow"); |
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return *(_sp++); |
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} |
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void *alloc(size_t size) { |
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int count = align_up(size, wordSize) >> LogBytesPerWord; |
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assert(count <= available_words(), "stack overflow"); |
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return _sp -= count; |
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} |
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int shadow_pages_size() const { |
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return _shadow_pages_size; |
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} |
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int abi_stack_available(Thread *thread) const; |
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public: |
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void overflow_check(int required_words, TRAPS); |
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static void handle_overflow(TRAPS); |
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public: |
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void zap(int c) PRODUCT_RETURN; |
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public: |
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static ByteSize base_offset() { |
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return byte_offset_of(ZeroStack, _base); |
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} |
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static ByteSize top_offset() { |
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return byte_offset_of(ZeroStack, _top); |
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} |
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static ByteSize sp_offset() { |
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return byte_offset_of(ZeroStack, _sp); |
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} |
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}; |
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class EntryFrame; |
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class InterpreterFrame; |
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class SharkFrame; |
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class FakeStubFrame; |
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// |
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// | ... | |
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// +--------------------+ ------------------ |
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// | ... | low addresses |
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// | frame_type | |
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// | next_frame | high addresses |
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// +--------------------+ ------------------ |
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// | ... | |
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class ZeroFrame { |
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friend class frame; |
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friend class ZeroStackPrinter; |
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protected: |
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ZeroFrame() { |
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ShouldNotCallThis(); |
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} |
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enum Layout { |
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next_frame_off, |
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frame_type_off, |
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jf_header_words |
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}; |
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enum FrameType { |
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ENTRY_FRAME = 1, |
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INTERPRETER_FRAME, |
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SHARK_FRAME, |
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FAKE_STUB_FRAME |
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}; |
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protected: |
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intptr_t *addr_of_word(int offset) const { |
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return (intptr_t *) this - offset; |
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} |
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intptr_t value_of_word(int offset) const { |
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return *addr_of_word(offset); |
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} |
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public: |
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ZeroFrame *next() const { |
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return (ZeroFrame *) value_of_word(next_frame_off); |
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} |
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protected: |
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FrameType type() const { |
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return (FrameType) value_of_word(frame_type_off); |
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} |
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public: |
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bool is_entry_frame() const { |
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return type() == ENTRY_FRAME; |
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} |
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bool is_interpreter_frame() const { |
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return type() == INTERPRETER_FRAME; |
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} |
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bool is_shark_frame() const { |
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return type() == SHARK_FRAME; |
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} |
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bool is_fake_stub_frame() const { |
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return type() == FAKE_STUB_FRAME; |
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} |
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public: |
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EntryFrame *as_entry_frame() const { |
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assert(is_entry_frame(), "should be"); |
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return (EntryFrame *) this; |
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} |
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InterpreterFrame *as_interpreter_frame() const { |
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assert(is_interpreter_frame(), "should be"); |
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return (InterpreterFrame *) this; |
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} |
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SharkFrame *as_shark_frame() const { |
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assert(is_shark_frame(), "should be"); |
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return (SharkFrame *) this; |
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} |
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FakeStubFrame *as_fake_stub_frame() const { |
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assert(is_fake_stub_frame(), "should be"); |
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return (FakeStubFrame *) this; |
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} |
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public: |
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void identify_word(int frame_index, |
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int offset, |
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char* fieldbuf, |
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char* valuebuf, |
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int buflen) const; |
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protected: |
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void identify_vp_word(int frame_index, |
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intptr_t* addr, |
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intptr_t* monitor_base, |
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intptr_t* stack_base, |
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char* fieldbuf, |
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int buflen) const; |
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}; |
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#endif // CPU_ZERO_VM_STACK_ZERO_HPP |