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src/share/vm/c1/c1_FrameMap.hpp@126ea7725993 (annotated)

src/share/vm/c1/c1_FrameMap.hpp

Tue, 03 Aug 2010 08:13:38 -0400

author

bobv

date

Tue, 03 Aug 2010 08:13:38 -0400

changeset 2036

126ea7725993

parent 1939

b812ff5abc73

child 2314

f95d63e2154a

permissions

-rw-r--r--

6953477: Increase portability and flexibility of building Hotspot
Summary: A collection of portability improvements including shared code support for PPC, ARM platforms, software floating point, cross compilation support and improvements in error crash detail.
Reviewed-by: phh, never, coleenp, dholmes

duke@435	1	/*
jrose@1934	2	* Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
duke@435	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435	4	*
duke@435	5	* This code is free software; you can redistribute it and/or modify it
duke@435	6	* under the terms of the GNU General Public License version 2 only, as
duke@435	7	* published by the Free Software Foundation.
duke@435	8	*
duke@435	9	* This code is distributed in the hope that it will be useful, but WITHOUT
duke@435	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435	12	* version 2 for more details (a copy is included in the LICENSE file that
duke@435	13	* accompanied this code).
duke@435	14	*
duke@435	15	* You should have received a copy of the GNU General Public License version
duke@435	16	* 2 along with this work; if not, write to the Free Software Foundation,
duke@435	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435	18	*
trims@1907	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907	20	* or visit www.oracle.com if you need additional information or have any
trims@1907	21	* questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
duke@435	25	class ciMethod;
duke@435	26	class CallingConvention;
duke@435	27	class BasicTypeArray;
duke@435	28	class BasicTypeList;
duke@435	29
duke@435	30	//--------------------------------------------------------
duke@435	31	// FrameMap
duke@435	32	//--------------------------------------------------------
duke@435	33
duke@435	34	// This class is responsible of mapping items (locals, monitors, spill
duke@435	35	// slots and registers to their frame location
duke@435	36	//
duke@435	37	// The monitors are specified by a consecutive index, although each monitor entry
duke@435	38	// occupies two words. The monitor_index is 0.._num_monitors
duke@435	39	// The spill index is similar to local index; it is in range 0..(open)
duke@435	40	//
duke@435	41	// The CPU registers are mapped using a fixed table; register with number 0
duke@435	42	// is the most used one.
duke@435	43
duke@435	44
duke@435	45	// stack grow direction --> SP
duke@435	46	// +----------+---+----------+-------+------------------------+-----+
duke@435	47	// |arguments | x | monitors | spill | reserved argument area | ABI |
duke@435	48	// +----------+---+----------+-------+------------------------+-----+
duke@435	49	//
duke@435	50	// x = ABI area (SPARC) or return adress and link (i486)
duke@435	51	// ABI = ABI area (SPARC) or nothing (i486)
duke@435	52
duke@435	53
duke@435	54	class LIR_OprDesc;
duke@435	55	typedef LIR_OprDesc* LIR_Opr;
duke@435	56
duke@435	57
duke@435	58	class FrameMap : public CompilationResourceObj {
duke@435	59	public:
duke@435	60	enum {
duke@435	61	nof_cpu_regs = pd_nof_cpu_regs_frame_map,
duke@435	62	nof_fpu_regs = pd_nof_fpu_regs_frame_map,
duke@435	63
duke@435	64	nof_cpu_regs_reg_alloc = pd_nof_cpu_regs_reg_alloc,
duke@435	65	nof_fpu_regs_reg_alloc = pd_nof_fpu_regs_reg_alloc,
duke@435	66
duke@435	67	nof_caller_save_cpu_regs = pd_nof_caller_save_cpu_regs_frame_map,
duke@435	68	nof_caller_save_fpu_regs = pd_nof_caller_save_fpu_regs_frame_map,
duke@435	69
duke@435	70	spill_slot_size_in_bytes = 4
duke@435	71	};
duke@435	72
duke@435	73	# include "incls/_c1_FrameMap_pd.hpp.incl" // platform dependent declarations
duke@435	74
duke@435	75	friend class LIR_OprDesc;
duke@435	76
duke@435	77	private:
duke@435	78	static bool _init_done;
duke@435	79	static Register _cpu_rnr2reg [nof_cpu_regs];
duke@435	80	static int _cpu_reg2rnr [nof_cpu_regs];
duke@435	81
duke@435	82	static LIR_Opr _caller_save_cpu_regs [nof_caller_save_cpu_regs];
duke@435	83	static LIR_Opr _caller_save_fpu_regs [nof_caller_save_fpu_regs];
duke@435	84
duke@435	85	int _framesize;
duke@435	86	int _argcount;
duke@435	87	int _num_monitors;
duke@435	88	int _num_spills;
duke@435	89	int _reserved_argument_area_size;
duke@435	90	int _oop_map_arg_count;
duke@435	91
duke@435	92	CallingConvention* _incoming_arguments;
duke@435	93	intArray* _argument_locations;
duke@435	94
duke@435	95	void check_spill_index (int spill_index) const { assert(spill_index >= 0, "bad index"); }
duke@435	96	void check_monitor_index (int monitor_index) const { assert(monitor_index >= 0 &&
duke@435	97	monitor_index < _num_monitors, "bad index"); }
duke@435	98
duke@435	99	static Register cpu_rnr2reg (int rnr) {
duke@435	100	assert(_init_done, "tables not initialized");
duke@435	101	debug_only(cpu_range_check(rnr);)
duke@435	102	return _cpu_rnr2reg[rnr];
duke@435	103	}
duke@435	104
duke@435	105	static int cpu_reg2rnr (Register reg) {
duke@435	106	assert(_init_done, "tables not initialized");
duke@435	107	debug_only(cpu_range_check(reg->encoding());)
duke@435	108	return _cpu_reg2rnr[reg->encoding()];
duke@435	109	}
duke@435	110
duke@435	111	static void map_register(int rnr, Register reg) {
duke@435	112	debug_only(cpu_range_check(rnr);)
duke@435	113	debug_only(cpu_range_check(reg->encoding());)
duke@435	114	_cpu_rnr2reg[rnr] = reg;
duke@435	115	_cpu_reg2rnr[reg->encoding()] = rnr;
duke@435	116	}
duke@435	117
duke@435	118	void update_reserved_argument_area_size (int size) {
duke@435	119	assert(size >= 0, "check");
duke@435	120	_reserved_argument_area_size = MAX2(_reserved_argument_area_size, size);
duke@435	121	}
duke@435	122
duke@435	123	protected:
duke@435	124	#ifndef PRODUCT
duke@435	125	static void cpu_range_check (int rnr) { assert(0 <= rnr && rnr < nof_cpu_regs, "cpu register number is too big"); }
duke@435	126	static void fpu_range_check (int rnr) { assert(0 <= rnr && rnr < nof_fpu_regs, "fpu register number is too big"); }
duke@435	127	#endif
duke@435	128
duke@435	129
duke@435	130	ByteSize sp_offset_for_monitor_base(const int idx) const;
duke@435	131
duke@435	132	Address make_new_address(ByteSize sp_offset) const;
duke@435	133
duke@435	134	ByteSize sp_offset_for_slot(const int idx) const;
duke@435	135	ByteSize sp_offset_for_double_slot(const int idx) const;
duke@435	136	ByteSize sp_offset_for_spill(const int idx) const;
duke@435	137	ByteSize sp_offset_for_monitor_lock(int monitor_index) const;
duke@435	138	ByteSize sp_offset_for_monitor_object(int monitor_index) const;
duke@435	139
duke@435	140	VMReg sp_offset2vmreg(ByteSize offset) const;
duke@435	141
duke@435	142	// platform dependent hook used to check that frame is properly
duke@435	143	// addressable on the platform. Used by sparc to verify that all
duke@435	144	// stack addresses are expressable in a simm13.
duke@435	145	bool validate_frame();
duke@435	146
duke@435	147	static LIR_Opr map_to_opr(BasicType type, VMRegPair* reg, bool incoming);
duke@435	148
duke@435	149	public:
duke@435	150	// Opr representing the stack_pointer on this platform
duke@435	151	static LIR_Opr stack_pointer();
duke@435	152
twisti@1919	153	// JSR 292
twisti@1919	154	static LIR_Opr method_handle_invoke_SP_save_opr();
twisti@1919	155
duke@435	156	static BasicTypeArray* signature_type_array_for(const ciMethod* method);
duke@435	157
duke@435	158	// for outgoing calls, these also update the reserved area to
duke@435	159	// include space for arguments and any ABI area.
duke@435	160	CallingConvention* c_calling_convention (const BasicTypeArray* signature);
duke@435	161	CallingConvention* java_calling_convention (const BasicTypeArray* signature, bool outgoing);
duke@435	162
duke@435	163	// deopt support
duke@435	164	ByteSize sp_offset_for_orig_pc() { return sp_offset_for_monitor_base(_num_monitors); }
duke@435	165
duke@435	166	static LIR_Opr as_opr(Register r) {
duke@435	167	return LIR_OprFact::single_cpu(cpu_reg2rnr(r));
duke@435	168	}
duke@435	169	static LIR_Opr as_oop_opr(Register r) {
duke@435	170	return LIR_OprFact::single_cpu_oop(cpu_reg2rnr(r));
duke@435	171	}
duke@435	172
duke@435	173	FrameMap(ciMethod* method, int monitors, int reserved_argument_area_size);
duke@435	174	bool finalize_frame(int nof_slots);
duke@435	175
duke@435	176	int reserved_argument_area_size () const { return _reserved_argument_area_size; }
duke@435	177	int framesize () const { assert(_framesize != -1, "hasn't been calculated"); return _framesize; }
duke@435	178	ByteSize framesize_in_bytes () const { return in_ByteSize(framesize() * 4); }
duke@435	179	int num_monitors () const { return _num_monitors; }
duke@435	180	int num_spills () const { assert(_num_spills >= 0, "not set"); return _num_spills; }
duke@435	181	int argcount () const { assert(_argcount >= 0, "not set"); return _argcount; }
duke@435	182
duke@435	183	int oop_map_arg_count() const { return _oop_map_arg_count; }
duke@435	184
duke@435	185	CallingConvention* incoming_arguments() const { return _incoming_arguments; }
duke@435	186
duke@435	187	// convenience routines
duke@435	188	Address address_for_slot(int index, int sp_adjust = 0) const {
duke@435	189	return make_new_address(sp_offset_for_slot(index) + in_ByteSize(sp_adjust));
duke@435	190	}
duke@435	191	Address address_for_double_slot(int index, int sp_adjust = 0) const {
duke@435	192	return make_new_address(sp_offset_for_double_slot(index) + in_ByteSize(sp_adjust));
duke@435	193	}
duke@435	194	Address address_for_monitor_lock(int monitor_index) const {
duke@435	195	return make_new_address(sp_offset_for_monitor_lock(monitor_index));
duke@435	196	}
duke@435	197	Address address_for_monitor_object(int monitor_index) const {
duke@435	198	return make_new_address(sp_offset_for_monitor_object(monitor_index));
duke@435	199	}
duke@435	200
duke@435	201	void print_frame_layout() const;
duke@435	202
duke@435	203	// Creates Location describing desired slot and returns it via pointer
duke@435	204	// to Location object. Returns true if the stack frame offset was legal
duke@435	205	// (as defined by Location::legal_offset_in_bytes()), false otherwise.
duke@435	206	// Do not use the returned location if this returns false.
duke@435	207	bool location_for_sp_offset(ByteSize byte_offset_from_sp,
duke@435	208	Location::Type loc_type, Location* loc) const;
duke@435	209
duke@435	210	bool location_for_monitor_lock (int monitor_index, Location* loc) const {
duke@435	211	return location_for_sp_offset(sp_offset_for_monitor_lock(monitor_index), Location::normal, loc);
duke@435	212	}
duke@435	213	bool location_for_monitor_object(int monitor_index, Location* loc) const {
duke@435	214	return location_for_sp_offset(sp_offset_for_monitor_object(monitor_index), Location::oop, loc);
duke@435	215	}
duke@435	216	bool locations_for_slot (int index, Location::Type loc_type,
duke@435	217	Location* loc, Location* second = NULL) const;
duke@435	218
duke@435	219	VMReg slot_regname(int index) const {
duke@435	220	return sp_offset2vmreg(sp_offset_for_slot(index));
duke@435	221	}
duke@435	222	VMReg monitor_object_regname(int monitor_index) const {
duke@435	223	return sp_offset2vmreg(sp_offset_for_monitor_object(monitor_index));
duke@435	224	}
duke@435	225	VMReg regname(LIR_Opr opr) const;
duke@435	226
duke@435	227	static LIR_Opr caller_save_cpu_reg_at(int i) {
duke@435	228	assert(i >= 0 && i < nof_caller_save_cpu_regs, "out of bounds");
duke@435	229	return _caller_save_cpu_regs[i];
duke@435	230	}
duke@435	231
duke@435	232	static LIR_Opr caller_save_fpu_reg_at(int i) {
duke@435	233	assert(i >= 0 && i < nof_caller_save_fpu_regs, "out of bounds");
duke@435	234	return _caller_save_fpu_regs[i];
duke@435	235	}
duke@435	236
iveresov@1939	237	static void initialize();
duke@435	238	};
duke@435	239
duke@435	240	// CallingConvention
duke@435	241	//--------------------------------------------------------
duke@435	242
duke@435	243	class CallingConvention: public ResourceObj {
duke@435	244	private:
duke@435	245	LIR_OprList* _args;
duke@435	246	int _reserved_stack_slots;
duke@435	247
duke@435	248	public:
duke@435	249	CallingConvention (LIR_OprList* args, int reserved_stack_slots)
duke@435	250	: _args(args)
duke@435	251	, _reserved_stack_slots(reserved_stack_slots) {}
duke@435	252
duke@435	253	LIR_OprList* args() { return _args; }
duke@435	254
duke@435	255	LIR_Opr at(int i) const { return _args->at(i); }
duke@435	256	int length() const { return _args->length(); }
duke@435	257
duke@435	258	// Indicates number of real frame slots used by arguments passed on stack.
duke@435	259	int reserved_stack_slots() const { return _reserved_stack_slots; }
duke@435	260
duke@435	261	#ifndef PRODUCT
duke@435	262	void print () const {
duke@435	263	for (int i = 0; i < length(); i++) {
duke@435	264	at(i)->print();
duke@435	265	}
duke@435	266	}
duke@435	267	#endif // PRODUCT
duke@435	268	};