Wed, 27 Apr 2016 01:25:04 +0800
Initial load
http://hg.openjdk.java.net/jdk8u/jdk8u/hotspot/
changeset: 6782:28b50d07f6f8
tag: jdk8u25-b17
aoqi@0 | 1 | /* |
aoqi@0 | 2 | * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. |
aoqi@0 | 3 | * Copyright 2008, 2009, 2010 Red Hat, Inc. |
aoqi@0 | 4 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
aoqi@0 | 5 | * |
aoqi@0 | 6 | * This code is free software; you can redistribute it and/or modify it |
aoqi@0 | 7 | * under the terms of the GNU General Public License version 2 only, as |
aoqi@0 | 8 | * published by the Free Software Foundation. |
aoqi@0 | 9 | * |
aoqi@0 | 10 | * This code is distributed in the hope that it will be useful, but WITHOUT |
aoqi@0 | 11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
aoqi@0 | 12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
aoqi@0 | 13 | * version 2 for more details (a copy is included in the LICENSE file that |
aoqi@0 | 14 | * accompanied this code). |
aoqi@0 | 15 | * |
aoqi@0 | 16 | * You should have received a copy of the GNU General Public License version |
aoqi@0 | 17 | * 2 along with this work; if not, write to the Free Software Foundation, |
aoqi@0 | 18 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
aoqi@0 | 19 | * |
aoqi@0 | 20 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
aoqi@0 | 21 | * or visit www.oracle.com if you need additional information or have any |
aoqi@0 | 22 | * questions. |
aoqi@0 | 23 | * |
aoqi@0 | 24 | */ |
aoqi@0 | 25 | |
aoqi@0 | 26 | #ifndef CPU_ZERO_VM_STACK_ZERO_HPP |
aoqi@0 | 27 | #define CPU_ZERO_VM_STACK_ZERO_HPP |
aoqi@0 | 28 | |
aoqi@0 | 29 | #include "utilities/sizes.hpp" |
aoqi@0 | 30 | |
aoqi@0 | 31 | class ZeroStack { |
aoqi@0 | 32 | private: |
aoqi@0 | 33 | intptr_t *_base; // the last available word |
aoqi@0 | 34 | intptr_t *_top; // the word past the end of the stack |
aoqi@0 | 35 | intptr_t *_sp; // the top word on the stack |
aoqi@0 | 36 | |
aoqi@0 | 37 | private: |
aoqi@0 | 38 | int _shadow_pages_size; // how much ABI stack must we keep free? |
aoqi@0 | 39 | |
aoqi@0 | 40 | public: |
aoqi@0 | 41 | ZeroStack() |
aoqi@0 | 42 | : _base(NULL), _top(NULL), _sp(NULL) { |
aoqi@0 | 43 | _shadow_pages_size = StackShadowPages * os::vm_page_size(); |
aoqi@0 | 44 | } |
aoqi@0 | 45 | |
aoqi@0 | 46 | bool needs_setup() const { |
aoqi@0 | 47 | return _base == NULL; |
aoqi@0 | 48 | } |
aoqi@0 | 49 | |
aoqi@0 | 50 | int suggest_size(Thread *thread) const; |
aoqi@0 | 51 | |
aoqi@0 | 52 | void setup(void *mem, size_t size) { |
aoqi@0 | 53 | assert(needs_setup(), "already set up"); |
aoqi@0 | 54 | assert(!(size & WordAlignmentMask), "unaligned"); |
aoqi@0 | 55 | |
aoqi@0 | 56 | _base = (intptr_t *) mem; |
aoqi@0 | 57 | _top = _base + (size >> LogBytesPerWord); |
aoqi@0 | 58 | _sp = _top; |
aoqi@0 | 59 | } |
aoqi@0 | 60 | void teardown() { |
aoqi@0 | 61 | assert(!needs_setup(), "not set up"); |
aoqi@0 | 62 | assert(_sp == _top, "stuff on stack at teardown"); |
aoqi@0 | 63 | |
aoqi@0 | 64 | _base = NULL; |
aoqi@0 | 65 | _top = NULL; |
aoqi@0 | 66 | _sp = NULL; |
aoqi@0 | 67 | } |
aoqi@0 | 68 | |
aoqi@0 | 69 | intptr_t *sp() const { |
aoqi@0 | 70 | return _sp; |
aoqi@0 | 71 | } |
aoqi@0 | 72 | void set_sp(intptr_t *new_sp) { |
aoqi@0 | 73 | assert(_top >= new_sp && new_sp >= _base, "bad stack pointer"); |
aoqi@0 | 74 | _sp = new_sp; |
aoqi@0 | 75 | } |
aoqi@0 | 76 | |
aoqi@0 | 77 | int total_words() const { |
aoqi@0 | 78 | return _top - _base; |
aoqi@0 | 79 | } |
aoqi@0 | 80 | int available_words() const { |
aoqi@0 | 81 | return _sp - _base; |
aoqi@0 | 82 | } |
aoqi@0 | 83 | |
aoqi@0 | 84 | void push(intptr_t value) { |
aoqi@0 | 85 | assert(_sp > _base, "stack overflow"); |
aoqi@0 | 86 | *(--_sp) = value; |
aoqi@0 | 87 | } |
aoqi@0 | 88 | intptr_t pop() { |
aoqi@0 | 89 | assert(_sp < _top, "stack underflow"); |
aoqi@0 | 90 | return *(_sp++); |
aoqi@0 | 91 | } |
aoqi@0 | 92 | |
aoqi@0 | 93 | void *alloc(size_t size) { |
aoqi@0 | 94 | int count = align_size_up(size, wordSize) >> LogBytesPerWord; |
aoqi@0 | 95 | assert(count <= available_words(), "stack overflow"); |
aoqi@0 | 96 | return _sp -= count; |
aoqi@0 | 97 | } |
aoqi@0 | 98 | |
aoqi@0 | 99 | int shadow_pages_size() const { |
aoqi@0 | 100 | return _shadow_pages_size; |
aoqi@0 | 101 | } |
aoqi@0 | 102 | int abi_stack_available(Thread *thread) const; |
aoqi@0 | 103 | |
aoqi@0 | 104 | public: |
aoqi@0 | 105 | void overflow_check(int required_words, TRAPS); |
aoqi@0 | 106 | static void handle_overflow(TRAPS); |
aoqi@0 | 107 | |
aoqi@0 | 108 | public: |
aoqi@0 | 109 | void zap(int c) PRODUCT_RETURN; |
aoqi@0 | 110 | |
aoqi@0 | 111 | public: |
aoqi@0 | 112 | static ByteSize base_offset() { |
aoqi@0 | 113 | return byte_offset_of(ZeroStack, _base); |
aoqi@0 | 114 | } |
aoqi@0 | 115 | static ByteSize top_offset() { |
aoqi@0 | 116 | return byte_offset_of(ZeroStack, _top); |
aoqi@0 | 117 | } |
aoqi@0 | 118 | static ByteSize sp_offset() { |
aoqi@0 | 119 | return byte_offset_of(ZeroStack, _sp); |
aoqi@0 | 120 | } |
aoqi@0 | 121 | }; |
aoqi@0 | 122 | |
aoqi@0 | 123 | |
aoqi@0 | 124 | class EntryFrame; |
aoqi@0 | 125 | class InterpreterFrame; |
aoqi@0 | 126 | class SharkFrame; |
aoqi@0 | 127 | class FakeStubFrame; |
aoqi@0 | 128 | |
aoqi@0 | 129 | // |
aoqi@0 | 130 | // | ... | |
aoqi@0 | 131 | // +--------------------+ ------------------ |
aoqi@0 | 132 | // | ... | low addresses |
aoqi@0 | 133 | // | frame_type | |
aoqi@0 | 134 | // | next_frame | high addresses |
aoqi@0 | 135 | // +--------------------+ ------------------ |
aoqi@0 | 136 | // | ... | |
aoqi@0 | 137 | |
aoqi@0 | 138 | class ZeroFrame { |
aoqi@0 | 139 | friend class frame; |
aoqi@0 | 140 | friend class ZeroStackPrinter; |
aoqi@0 | 141 | |
aoqi@0 | 142 | protected: |
aoqi@0 | 143 | ZeroFrame() { |
aoqi@0 | 144 | ShouldNotCallThis(); |
aoqi@0 | 145 | } |
aoqi@0 | 146 | |
aoqi@0 | 147 | enum Layout { |
aoqi@0 | 148 | next_frame_off, |
aoqi@0 | 149 | frame_type_off, |
aoqi@0 | 150 | jf_header_words |
aoqi@0 | 151 | }; |
aoqi@0 | 152 | |
aoqi@0 | 153 | enum FrameType { |
aoqi@0 | 154 | ENTRY_FRAME = 1, |
aoqi@0 | 155 | INTERPRETER_FRAME, |
aoqi@0 | 156 | SHARK_FRAME, |
aoqi@0 | 157 | FAKE_STUB_FRAME |
aoqi@0 | 158 | }; |
aoqi@0 | 159 | |
aoqi@0 | 160 | protected: |
aoqi@0 | 161 | intptr_t *addr_of_word(int offset) const { |
aoqi@0 | 162 | return (intptr_t *) this - offset; |
aoqi@0 | 163 | } |
aoqi@0 | 164 | intptr_t value_of_word(int offset) const { |
aoqi@0 | 165 | return *addr_of_word(offset); |
aoqi@0 | 166 | } |
aoqi@0 | 167 | |
aoqi@0 | 168 | public: |
aoqi@0 | 169 | ZeroFrame *next() const { |
aoqi@0 | 170 | return (ZeroFrame *) value_of_word(next_frame_off); |
aoqi@0 | 171 | } |
aoqi@0 | 172 | |
aoqi@0 | 173 | protected: |
aoqi@0 | 174 | FrameType type() const { |
aoqi@0 | 175 | return (FrameType) value_of_word(frame_type_off); |
aoqi@0 | 176 | } |
aoqi@0 | 177 | |
aoqi@0 | 178 | public: |
aoqi@0 | 179 | bool is_entry_frame() const { |
aoqi@0 | 180 | return type() == ENTRY_FRAME; |
aoqi@0 | 181 | } |
aoqi@0 | 182 | bool is_interpreter_frame() const { |
aoqi@0 | 183 | return type() == INTERPRETER_FRAME; |
aoqi@0 | 184 | } |
aoqi@0 | 185 | bool is_shark_frame() const { |
aoqi@0 | 186 | return type() == SHARK_FRAME; |
aoqi@0 | 187 | } |
aoqi@0 | 188 | bool is_fake_stub_frame() const { |
aoqi@0 | 189 | return type() == FAKE_STUB_FRAME; |
aoqi@0 | 190 | } |
aoqi@0 | 191 | |
aoqi@0 | 192 | public: |
aoqi@0 | 193 | EntryFrame *as_entry_frame() const { |
aoqi@0 | 194 | assert(is_entry_frame(), "should be"); |
aoqi@0 | 195 | return (EntryFrame *) this; |
aoqi@0 | 196 | } |
aoqi@0 | 197 | InterpreterFrame *as_interpreter_frame() const { |
aoqi@0 | 198 | assert(is_interpreter_frame(), "should be"); |
aoqi@0 | 199 | return (InterpreterFrame *) this; |
aoqi@0 | 200 | } |
aoqi@0 | 201 | SharkFrame *as_shark_frame() const { |
aoqi@0 | 202 | assert(is_shark_frame(), "should be"); |
aoqi@0 | 203 | return (SharkFrame *) this; |
aoqi@0 | 204 | } |
aoqi@0 | 205 | FakeStubFrame *as_fake_stub_frame() const { |
aoqi@0 | 206 | assert(is_fake_stub_frame(), "should be"); |
aoqi@0 | 207 | return (FakeStubFrame *) this; |
aoqi@0 | 208 | } |
aoqi@0 | 209 | |
aoqi@0 | 210 | public: |
aoqi@0 | 211 | void identify_word(int frame_index, |
aoqi@0 | 212 | int offset, |
aoqi@0 | 213 | char* fieldbuf, |
aoqi@0 | 214 | char* valuebuf, |
aoqi@0 | 215 | int buflen) const; |
aoqi@0 | 216 | |
aoqi@0 | 217 | protected: |
aoqi@0 | 218 | void identify_vp_word(int frame_index, |
aoqi@0 | 219 | intptr_t* addr, |
aoqi@0 | 220 | intptr_t* monitor_base, |
aoqi@0 | 221 | intptr_t* stack_base, |
aoqi@0 | 222 | char* fieldbuf, |
aoqi@0 | 223 | int buflen) const; |
aoqi@0 | 224 | }; |
aoqi@0 | 225 | |
aoqi@0 | 226 | #endif // CPU_ZERO_VM_STACK_ZERO_HPP |