• file
• revisions
• annotate
• diff
• comparison
• raw

src/cpu/zero/vm/stack_zero.hpp@a9becfeecd1b (annotated)

src/cpu/zero/vm/stack_zero.hpp

Wed, 22 Jan 2014 17:42:23 -0800

author

kvn

date

Wed, 22 Jan 2014 17:42:23 -0800

changeset 6503

a9becfeecd1b

parent 2314

f95d63e2154a

child 6876

710a3c8b516e

permissions

-rw-r--r--

Merge

never@1445	1	/*
stefank@2314	2	* Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
twisti@1814	3	* Copyright 2008, 2009, 2010 Red Hat, Inc.
never@1445	4	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
never@1445	5	*
never@1445	6	* This code is free software; you can redistribute it and/or modify it
never@1445	7	* under the terms of the GNU General Public License version 2 only, as
never@1445	8	* published by the Free Software Foundation.
never@1445	9	*
never@1445	10	* This code is distributed in the hope that it will be useful, but WITHOUT
never@1445	11	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
never@1445	12	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
never@1445	13	* version 2 for more details (a copy is included in the LICENSE file that
never@1445	14	* accompanied this code).
never@1445	15	*
never@1445	16	* You should have received a copy of the GNU General Public License version
never@1445	17	* 2 along with this work; if not, write to the Free Software Foundation,
never@1445	18	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
never@1445	19	*
trims@1907	20	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907	21	* or visit www.oracle.com if you need additional information or have any
trims@1907	22	* questions.
never@1445	23	*
never@1445	24	*/
never@1445	25
stefank@2314	26	#ifndef CPU_ZERO_VM_STACK_ZERO_HPP
stefank@2314	27	#define CPU_ZERO_VM_STACK_ZERO_HPP
stefank@2314	28
stefank@2314	29	#include "utilities/sizes.hpp"
stefank@2314	30
never@1445	31	class ZeroStack {
never@1445	32	private:
never@1445	33	intptr_t *_base; // the last available word
never@1445	34	intptr_t *_top; // the word past the end of the stack
never@1445	35	intptr_t *_sp; // the top word on the stack
never@1445	36
twisti@1814	37	private:
twisti@1814	38	int _shadow_pages_size; // how much ABI stack must we keep free?
twisti@1814	39
never@1445	40	public:
never@1445	41	ZeroStack()
twisti@1814	42	: _base(NULL), _top(NULL), _sp(NULL) {
twisti@1814	43	_shadow_pages_size = StackShadowPages * os::vm_page_size();
twisti@1814	44	}
never@1445	45
never@1445	46	bool needs_setup() const {
never@1445	47	return _base == NULL;
never@1445	48	}
never@1445	49
twisti@1866	50	int suggest_size(Thread *thread) const;
twisti@1866	51
never@1445	52	void setup(void *mem, size_t size) {
never@1445	53	assert(needs_setup(), "already set up");
never@1445	54	assert(!(size & WordAlignmentMask), "unaligned");
never@1445	55
never@1445	56	_base = (intptr_t *) mem;
never@1445	57	_top = _base + (size >> LogBytesPerWord);
never@1445	58	_sp = _top;
never@1445	59	}
never@1445	60	void teardown() {
never@1445	61	assert(!needs_setup(), "not set up");
never@1445	62	assert(_sp == _top, "stuff on stack at teardown");
never@1445	63
never@1445	64	_base = NULL;
never@1445	65	_top = NULL;
never@1445	66	_sp = NULL;
never@1445	67	}
never@1445	68
never@1445	69	intptr_t *sp() const {
never@1445	70	return _sp;
never@1445	71	}
never@1445	72	void set_sp(intptr_t *new_sp) {
never@1445	73	assert(_top >= new_sp && new_sp >= _base, "bad stack pointer");
never@1445	74	_sp = new_sp;
never@1445	75	}
never@1445	76
twisti@1866	77	int total_words() const {
twisti@1866	78	return _top - _base;
twisti@1866	79	}
never@1445	80	int available_words() const {
never@1445	81	return _sp - _base;
never@1445	82	}
never@1445	83
never@1445	84	void push(intptr_t value) {
never@1445	85	assert(_sp > _base, "stack overflow");
never@1445	86	*(--_sp) = value;
never@1445	87	}
never@1445	88	intptr_t pop() {
never@1445	89	assert(_sp < _top, "stack underflow");
never@1445	90	return *(_sp++);
never@1445	91	}
never@1445	92
never@1445	93	void *alloc(size_t size) {
never@1445	94	int count = align_size_up(size, wordSize) >> LogBytesPerWord;
never@1445	95	assert(count <= available_words(), "stack overflow");
never@1445	96	return _sp -= count;
never@1445	97	}
never@1445	98
twisti@1814	99	int shadow_pages_size() const {
twisti@1814	100	return _shadow_pages_size;
twisti@1814	101	}
twisti@1866	102	int abi_stack_available(Thread *thread) const;
twisti@1814	103
twisti@1814	104	public:
twisti@1814	105	void overflow_check(int required_words, TRAPS);
twisti@1814	106	static void handle_overflow(TRAPS);
twisti@1814	107
never@1445	108	public:
twisti@1860	109	void zap(int c) PRODUCT_RETURN;
twisti@1860	110
twisti@1860	111	public:
never@1445	112	static ByteSize base_offset() {
never@1445	113	return byte_offset_of(ZeroStack, _base);
never@1445	114	}
never@1445	115	static ByteSize top_offset() {
never@1445	116	return byte_offset_of(ZeroStack, _top);
never@1445	117	}
never@1445	118	static ByteSize sp_offset() {
never@1445	119	return byte_offset_of(ZeroStack, _sp);
never@1445	120	}
never@1445	121	};
never@1445	122
never@1445	123
never@1445	124	class EntryFrame;
never@1445	125	class InterpreterFrame;
never@1445	126	class SharkFrame;
never@1445	127	class FakeStubFrame;
never@1445	128
never@1445	129	//
never@1445	130	// | ... |
never@1445	131	// +--------------------+ ------------------
never@1445	132	// | ... | low addresses
never@1445	133	// | frame_type |
never@1445	134	// | next_frame | high addresses
never@1445	135	// +--------------------+ ------------------
never@1445	136	// | ... |
never@1445	137
never@1445	138	class ZeroFrame {
never@1445	139	friend class frame;
never@1445	140	friend class ZeroStackPrinter;
never@1445	141
never@1445	142	protected:
never@1445	143	ZeroFrame() {
never@1445	144	ShouldNotCallThis();
never@1445	145	}
never@1445	146
never@1445	147	enum Layout {
never@1445	148	next_frame_off,
never@1445	149	frame_type_off,
never@1445	150	jf_header_words
never@1445	151	};
never@1445	152
never@1445	153	enum FrameType {
never@1445	154	ENTRY_FRAME = 1,
never@1445	155	INTERPRETER_FRAME,
never@1445	156	SHARK_FRAME,
never@1445	157	FAKE_STUB_FRAME
never@1445	158	};
never@1445	159
never@1445	160	protected:
never@1445	161	intptr_t *addr_of_word(int offset) const {
never@1445	162	return (intptr_t *) this - offset;
never@1445	163	}
never@1445	164	intptr_t value_of_word(int offset) const {
never@1445	165	return *addr_of_word(offset);
never@1445	166	}
never@1445	167
never@1445	168	public:
never@1445	169	ZeroFrame *next() const {
never@1445	170	return (ZeroFrame *) value_of_word(next_frame_off);
never@1445	171	}
never@1445	172
never@1445	173	protected:
never@1445	174	FrameType type() const {
never@1445	175	return (FrameType) value_of_word(frame_type_off);
never@1445	176	}
never@1445	177
never@1445	178	public:
never@1445	179	bool is_entry_frame() const {
never@1445	180	return type() == ENTRY_FRAME;
never@1445	181	}
never@1445	182	bool is_interpreter_frame() const {
never@1445	183	return type() == INTERPRETER_FRAME;
never@1445	184	}
never@1445	185	bool is_shark_frame() const {
never@1445	186	return type() == SHARK_FRAME;
never@1445	187	}
never@1445	188	bool is_fake_stub_frame() const {
never@1445	189	return type() == FAKE_STUB_FRAME;
never@1445	190	}
never@1445	191
never@1445	192	public:
never@1445	193	EntryFrame *as_entry_frame() const {
never@1445	194	assert(is_entry_frame(), "should be");
never@1445	195	return (EntryFrame *) this;
never@1445	196	}
never@1445	197	InterpreterFrame *as_interpreter_frame() const {
never@1445	198	assert(is_interpreter_frame(), "should be");
never@1445	199	return (InterpreterFrame *) this;
never@1445	200	}
never@1445	201	SharkFrame *as_shark_frame() const {
never@1445	202	assert(is_shark_frame(), "should be");
never@1445	203	return (SharkFrame *) this;
never@1445	204	}
never@1445	205	FakeStubFrame *as_fake_stub_frame() const {
never@1445	206	assert(is_fake_stub_frame(), "should be");
never@1445	207	return (FakeStubFrame *) this;
never@1445	208	}
never@1445	209
never@1445	210	public:
never@1445	211	void identify_word(int frame_index,
never@1445	212	int offset,
never@1445	213	char* fieldbuf,
never@1445	214	char* valuebuf,
never@1445	215	int buflen) const;
never@1445	216
never@1445	217	protected:
never@1445	218	void identify_vp_word(int frame_index,
never@1445	219	intptr_t* addr,
never@1445	220	intptr_t* monitor_base,
never@1445	221	intptr_t* stack_base,
never@1445	222	char* fieldbuf,
never@1445	223	int buflen) const;
never@1445	224	};
stefank@2314	225
stefank@2314	226	#endif // CPU_ZERO_VM_STACK_ZERO_HPP