Mercurial > hg > graal-compiler
annotate src/share/vm/prims/methodHandles.hpp @ 3272:01147d8aac1d
7009923: JSR 292: VM crash in JavaThread::last_frame
Summary: Handle stack overflow before the first frame is called, by printing out the called method and not walking the stack.
Reviewed-by: dholmes, phh, dsamersoff
author | coleenp |
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date | Tue, 26 Apr 2011 14:04:43 -0400 |
parents | 8033953d67ff |
children | 2a23b1b5a0a8 |
rev | line source |
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710 | 1 /* |
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2 * Copyright (c) 2008, 2011, Oracle and/or its affiliates. All rights reserved. |
710 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
710 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_PRIMS_METHODHANDLES_HPP |
26 #define SHARE_VM_PRIMS_METHODHANDLES_HPP | |
27 | |
28 #include "classfile/javaClasses.hpp" | |
29 #include "classfile/vmSymbols.hpp" | |
30 #include "runtime/frame.inline.hpp" | |
31 #include "runtime/globals.hpp" | |
32 #include "runtime/interfaceSupport.hpp" | |
33 | |
710 | 34 class MacroAssembler; |
35 class Label; | |
36 class MethodHandleEntry; | |
37 | |
38 class MethodHandles: AllStatic { | |
39 // JVM support for MethodHandle, MethodType, and related types | |
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40 // in java.lang.invoke and sun.invoke. |
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41 // See also javaClasses for layouts java_lang_invoke_Method{Handle,Type,Type::Form}. |
710 | 42 public: |
43 enum EntryKind { | |
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44 _raise_exception, // stub for error generation from other stubs |
710 | 45 _invokestatic_mh, // how a MH emulates invokestatic |
46 _invokespecial_mh, // ditto for the other invokes... | |
47 _invokevirtual_mh, | |
48 _invokeinterface_mh, | |
49 _bound_ref_mh, // reference argument is bound | |
50 _bound_int_mh, // int argument is bound (via an Integer or Float) | |
51 _bound_long_mh, // long argument is bound (via a Long or Double) | |
52 _bound_ref_direct_mh, // same as above, with direct linkage to methodOop | |
53 _bound_int_direct_mh, | |
54 _bound_long_direct_mh, | |
55 | |
56 _adapter_mh_first, // adapter sequence goes here... | |
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57 _adapter_retype_only = _adapter_mh_first + java_lang_invoke_AdapterMethodHandle::OP_RETYPE_ONLY, |
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58 _adapter_retype_raw = _adapter_mh_first + java_lang_invoke_AdapterMethodHandle::OP_RETYPE_RAW, |
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59 _adapter_check_cast = _adapter_mh_first + java_lang_invoke_AdapterMethodHandle::OP_CHECK_CAST, |
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60 _adapter_prim_to_prim = _adapter_mh_first + java_lang_invoke_AdapterMethodHandle::OP_PRIM_TO_PRIM, |
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61 _adapter_ref_to_prim = _adapter_mh_first + java_lang_invoke_AdapterMethodHandle::OP_REF_TO_PRIM, |
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62 _adapter_prim_to_ref = _adapter_mh_first + java_lang_invoke_AdapterMethodHandle::OP_PRIM_TO_REF, |
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63 _adapter_swap_args = _adapter_mh_first + java_lang_invoke_AdapterMethodHandle::OP_SWAP_ARGS, |
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64 _adapter_rot_args = _adapter_mh_first + java_lang_invoke_AdapterMethodHandle::OP_ROT_ARGS, |
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65 _adapter_dup_args = _adapter_mh_first + java_lang_invoke_AdapterMethodHandle::OP_DUP_ARGS, |
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66 _adapter_drop_args = _adapter_mh_first + java_lang_invoke_AdapterMethodHandle::OP_DROP_ARGS, |
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67 _adapter_collect_args = _adapter_mh_first + java_lang_invoke_AdapterMethodHandle::OP_COLLECT_ARGS, |
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68 _adapter_spread_args = _adapter_mh_first + java_lang_invoke_AdapterMethodHandle::OP_SPREAD_ARGS, |
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69 _adapter_flyby = _adapter_mh_first + java_lang_invoke_AdapterMethodHandle::OP_FLYBY, |
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70 _adapter_ricochet = _adapter_mh_first + java_lang_invoke_AdapterMethodHandle::OP_RICOCHET, |
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71 _adapter_mh_last = _adapter_mh_first + java_lang_invoke_AdapterMethodHandle::CONV_OP_LIMIT - 1, |
710 | 72 |
73 // Optimized adapter types | |
74 | |
75 // argument list reordering | |
76 _adapter_opt_swap_1, | |
77 _adapter_opt_swap_2, | |
78 _adapter_opt_rot_1_up, | |
79 _adapter_opt_rot_1_down, | |
80 _adapter_opt_rot_2_up, | |
81 _adapter_opt_rot_2_down, | |
82 // primitive single to single: | |
83 _adapter_opt_i2i, // i2c, i2z, i2b, i2s | |
84 // primitive double to single: | |
85 _adapter_opt_l2i, | |
86 _adapter_opt_d2f, | |
87 // primitive single to double: | |
88 _adapter_opt_i2l, | |
89 _adapter_opt_f2d, | |
90 // conversion between floating point and integer type is handled by Java | |
91 | |
92 // reference to primitive: | |
93 _adapter_opt_unboxi, | |
94 _adapter_opt_unboxl, | |
95 | |
96 // spreading (array length cases 0, 1, >=2) | |
97 _adapter_opt_spread_0, | |
98 _adapter_opt_spread_1, | |
99 _adapter_opt_spread_more, | |
100 | |
101 _EK_LIMIT, | |
102 _EK_FIRST = 0 | |
103 }; | |
104 | |
105 public: | |
106 static bool enabled() { return _enabled; } | |
107 static void set_enabled(bool z); | |
108 | |
109 private: | |
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110 enum { // import java_lang_invoke_AdapterMethodHandle::CONV_OP_* |
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111 CONV_OP_LIMIT = java_lang_invoke_AdapterMethodHandle::CONV_OP_LIMIT, |
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112 CONV_OP_MASK = java_lang_invoke_AdapterMethodHandle::CONV_OP_MASK, |
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113 CONV_VMINFO_MASK = java_lang_invoke_AdapterMethodHandle::CONV_VMINFO_MASK, |
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114 CONV_VMINFO_SHIFT = java_lang_invoke_AdapterMethodHandle::CONV_VMINFO_SHIFT, |
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115 CONV_OP_SHIFT = java_lang_invoke_AdapterMethodHandle::CONV_OP_SHIFT, |
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116 CONV_DEST_TYPE_SHIFT = java_lang_invoke_AdapterMethodHandle::CONV_DEST_TYPE_SHIFT, |
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117 CONV_SRC_TYPE_SHIFT = java_lang_invoke_AdapterMethodHandle::CONV_SRC_TYPE_SHIFT, |
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118 CONV_STACK_MOVE_SHIFT = java_lang_invoke_AdapterMethodHandle::CONV_STACK_MOVE_SHIFT, |
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119 CONV_STACK_MOVE_MASK = java_lang_invoke_AdapterMethodHandle::CONV_STACK_MOVE_MASK |
710 | 120 }; |
121 | |
122 static bool _enabled; | |
123 static MethodHandleEntry* _entries[_EK_LIMIT]; | |
124 static const char* _entry_names[_EK_LIMIT+1]; | |
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125 static jobject _raise_exception_method; |
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126 |
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127 // Adapters. |
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128 static MethodHandlesAdapterBlob* _adapter_code; |
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129 static int _adapter_code_size; |
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130 |
710 | 131 static bool ek_valid(EntryKind ek) { return (uint)ek < (uint)_EK_LIMIT; } |
132 static bool conv_op_valid(int op) { return (uint)op < (uint)CONV_OP_LIMIT; } | |
133 | |
134 public: | |
135 static bool have_entry(EntryKind ek) { return ek_valid(ek) && _entries[ek] != NULL; } | |
136 static MethodHandleEntry* entry(EntryKind ek) { assert(ek_valid(ek), "initialized"); | |
137 return _entries[ek]; } | |
138 static const char* entry_name(EntryKind ek) { assert(ek_valid(ek), "oob"); | |
139 return _entry_names[ek]; } | |
140 static EntryKind adapter_entry_kind(int op) { assert(conv_op_valid(op), "oob"); | |
141 return EntryKind(_adapter_mh_first + op); } | |
142 | |
143 static void init_entry(EntryKind ek, MethodHandleEntry* me) { | |
144 assert(ek_valid(ek), "oob"); | |
145 assert(_entries[ek] == NULL, "no double initialization"); | |
146 _entries[ek] = me; | |
147 } | |
148 | |
1304 | 149 // Some adapter helper functions. |
150 static void get_ek_bound_mh_info(EntryKind ek, BasicType& arg_type, int& arg_mask, int& arg_slots) { | |
151 switch (ek) { | |
152 case _bound_int_mh : // fall-thru | |
153 case _bound_int_direct_mh : arg_type = T_INT; arg_mask = _INSERT_INT_MASK; break; | |
154 case _bound_long_mh : // fall-thru | |
155 case _bound_long_direct_mh: arg_type = T_LONG; arg_mask = _INSERT_LONG_MASK; break; | |
156 case _bound_ref_mh : // fall-thru | |
157 case _bound_ref_direct_mh : arg_type = T_OBJECT; arg_mask = _INSERT_REF_MASK; break; | |
158 default: ShouldNotReachHere(); | |
159 } | |
160 arg_slots = type2size[arg_type]; | |
161 } | |
162 | |
163 static void get_ek_adapter_opt_swap_rot_info(EntryKind ek, int& swap_bytes, int& rotate) { | |
164 int swap_slots = 0; | |
165 switch (ek) { | |
166 case _adapter_opt_swap_1: swap_slots = 1; rotate = 0; break; | |
167 case _adapter_opt_swap_2: swap_slots = 2; rotate = 0; break; | |
168 case _adapter_opt_rot_1_up: swap_slots = 1; rotate = 1; break; | |
169 case _adapter_opt_rot_1_down: swap_slots = 1; rotate = -1; break; | |
170 case _adapter_opt_rot_2_up: swap_slots = 2; rotate = 1; break; | |
171 case _adapter_opt_rot_2_down: swap_slots = 2; rotate = -1; break; | |
172 default: ShouldNotReachHere(); | |
173 } | |
174 // Return the size of the stack slots to move in bytes. | |
1506 | 175 swap_bytes = swap_slots * Interpreter::stackElementSize; |
1304 | 176 } |
177 | |
178 static int get_ek_adapter_opt_spread_info(EntryKind ek) { | |
179 switch (ek) { | |
180 case _adapter_opt_spread_0: return 0; | |
181 case _adapter_opt_spread_1: return 1; | |
182 default : return -1; | |
183 } | |
184 } | |
185 | |
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186 static methodOop raise_exception_method() { |
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187 oop rem = JNIHandles::resolve(_raise_exception_method); |
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188 assert(rem == NULL || rem->is_method(), ""); |
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189 return (methodOop) rem; |
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190 } |
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191 static void set_raise_exception_method(methodOop rem) { |
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192 assert(_raise_exception_method == NULL, ""); |
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193 _raise_exception_method = JNIHandles::make_global(Handle(rem)); |
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194 } |
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195 |
710 | 196 static jint adapter_conversion(int conv_op, BasicType src, BasicType dest, |
197 int stack_move = 0, int vminfo = 0) { | |
198 assert(conv_op_valid(conv_op), "oob"); | |
199 jint conv = ((conv_op << CONV_OP_SHIFT) | |
200 | (src << CONV_SRC_TYPE_SHIFT) | |
201 | (dest << CONV_DEST_TYPE_SHIFT) | |
202 | (stack_move << CONV_STACK_MOVE_SHIFT) | |
203 | (vminfo << CONV_VMINFO_SHIFT) | |
204 ); | |
205 assert(adapter_conversion_op(conv) == conv_op, "decode conv_op"); | |
206 assert(adapter_conversion_src_type(conv) == src, "decode src"); | |
207 assert(adapter_conversion_dest_type(conv) == dest, "decode dest"); | |
208 assert(adapter_conversion_stack_move(conv) == stack_move, "decode stack_move"); | |
209 assert(adapter_conversion_vminfo(conv) == vminfo, "decode vminfo"); | |
210 return conv; | |
211 } | |
212 static int adapter_conversion_op(jint conv) { | |
213 return ((conv >> CONV_OP_SHIFT) & 0xF); | |
214 } | |
215 static BasicType adapter_conversion_src_type(jint conv) { | |
216 return (BasicType)((conv >> CONV_SRC_TYPE_SHIFT) & 0xF); | |
217 } | |
218 static BasicType adapter_conversion_dest_type(jint conv) { | |
219 return (BasicType)((conv >> CONV_DEST_TYPE_SHIFT) & 0xF); | |
220 } | |
221 static int adapter_conversion_stack_move(jint conv) { | |
222 return (conv >> CONV_STACK_MOVE_SHIFT); | |
223 } | |
224 static int adapter_conversion_vminfo(jint conv) { | |
225 return (conv >> CONV_VMINFO_SHIFT) & CONV_VMINFO_MASK; | |
226 } | |
227 | |
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228 // Bit mask of conversion_op values. May vary by platform. |
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229 static int adapter_conversion_ops_supported_mask(); |
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230 |
710 | 231 // Offset in words that the interpreter stack pointer moves when an argument is pushed. |
232 // The stack_move value must always be a multiple of this. | |
233 static int stack_move_unit() { | |
1506 | 234 return frame::interpreter_frame_expression_stack_direction() * Interpreter::stackElementWords; |
710 | 235 } |
236 | |
237 enum { CONV_VMINFO_SIGN_FLAG = 0x80 }; | |
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238 // Shift values for prim-to-prim conversions. |
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239 static int adapter_prim_to_prim_subword_vminfo(BasicType dest) { |
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240 if (dest == T_BOOLEAN) return (BitsPerInt - 1); // boolean is 1 bit |
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241 if (dest == T_CHAR) return (BitsPerInt - BitsPerShort); |
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242 if (dest == T_BYTE) return (BitsPerInt - BitsPerByte ) | CONV_VMINFO_SIGN_FLAG; |
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243 if (dest == T_SHORT) return (BitsPerInt - BitsPerShort) | CONV_VMINFO_SIGN_FLAG; |
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244 return 0; // case T_INT |
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245 } |
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246 // Shift values for unboxing a primitive. |
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247 static int adapter_unbox_subword_vminfo(BasicType dest) { |
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248 if (dest == T_BOOLEAN) return (BitsPerInt - BitsPerByte ); // implemented as 1 byte |
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249 if (dest == T_CHAR) return (BitsPerInt - BitsPerShort); |
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250 if (dest == T_BYTE) return (BitsPerInt - BitsPerByte ) | CONV_VMINFO_SIGN_FLAG; |
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251 if (dest == T_SHORT) return (BitsPerInt - BitsPerShort) | CONV_VMINFO_SIGN_FLAG; |
710 | 252 return 0; // case T_INT |
253 } | |
254 // Here is the transformation the i2i adapter must perform: | |
255 static int truncate_subword_from_vminfo(jint value, int vminfo) { | |
256 jint tem = value << vminfo; | |
257 if ((vminfo & CONV_VMINFO_SIGN_FLAG) != 0) { | |
258 return (jint)tem >> vminfo; | |
259 } else { | |
260 return (juint)tem >> vminfo; | |
261 } | |
262 } | |
263 | |
264 static inline address from_compiled_entry(EntryKind ek); | |
265 static inline address from_interpreted_entry(EntryKind ek); | |
266 | |
267 // helpers for decode_method. | |
268 static methodOop decode_methodOop(methodOop m, int& decode_flags_result); | |
269 static methodOop decode_vmtarget(oop vmtarget, int vmindex, oop mtype, klassOop& receiver_limit_result, int& decode_flags_result); | |
270 static methodOop decode_MemberName(oop mname, klassOop& receiver_limit_result, int& decode_flags_result); | |
271 static methodOop decode_MethodHandle(oop mh, klassOop& receiver_limit_result, int& decode_flags_result); | |
272 static methodOop decode_DirectMethodHandle(oop mh, klassOop& receiver_limit_result, int& decode_flags_result); | |
273 static methodOop decode_BoundMethodHandle(oop mh, klassOop& receiver_limit_result, int& decode_flags_result); | |
274 static methodOop decode_AdapterMethodHandle(oop mh, klassOop& receiver_limit_result, int& decode_flags_result); | |
275 | |
276 // Find out how many stack slots an mh pushes or pops. | |
277 // The result is *not* reported as a multiple of stack_move_unit(); | |
278 // It is a signed net number of pushes (a difference in vmslots). | |
279 // To compare with a stack_move value, first multiply by stack_move_unit(). | |
280 static int decode_MethodHandle_stack_pushes(oop mh); | |
281 | |
282 public: | |
283 // working with member names | |
284 static void resolve_MemberName(Handle mname, TRAPS); // compute vmtarget/vmindex from name/type | |
285 static void expand_MemberName(Handle mname, int suppress, TRAPS); // expand defc/name/type if missing | |
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286 static Handle new_MemberName(TRAPS); // must be followed by init_MemberName |
710 | 287 static void init_MemberName(oop mname_oop, oop target); // compute vmtarget/vmindex from target |
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288 static void init_MemberName(oop mname_oop, methodOop m, bool do_dispatch = true); |
710 | 289 static void init_MemberName(oop mname_oop, klassOop field_holder, AccessFlags mods, int offset); |
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290 static int find_MemberNames(klassOop k, Symbol* name, Symbol* sig, |
710 | 291 int mflags, klassOop caller, |
292 int skip, objArrayOop results); | |
293 // bit values for suppress argument to expand_MemberName: | |
294 enum { _suppress_defc = 1, _suppress_name = 2, _suppress_type = 4 }; | |
295 | |
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296 // Generate MethodHandles adapters. |
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297 static void generate_adapters(); |
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298 |
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299 // Called from InterpreterGenerator and MethodHandlesAdapterGenerator. |
710 | 300 static address generate_method_handle_interpreter_entry(MacroAssembler* _masm); |
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301 static void generate_method_handle_stub(MacroAssembler* _masm, EntryKind ek); |
710 | 302 |
303 // argument list parsing | |
304 static int argument_slot(oop method_type, int arg); | |
305 static int argument_slot_count(oop method_type) { return argument_slot(method_type, -1); } | |
306 static int argument_slot_to_argnum(oop method_type, int argslot); | |
307 | |
308 // Runtime support | |
309 enum { // bit-encoded flags from decode_method or decode_vmref | |
310 _dmf_has_receiver = 0x01, // target method has leading reference argument | |
311 _dmf_does_dispatch = 0x02, // method handle performs virtual or interface dispatch | |
312 _dmf_from_interface = 0x04, // peforms interface dispatch | |
313 _DMF_DIRECT_MASK = (_dmf_from_interface*2 - _dmf_has_receiver), | |
314 _dmf_binds_method = 0x08, | |
315 _dmf_binds_argument = 0x10, | |
316 _DMF_BOUND_MASK = (_dmf_binds_argument*2 - _dmf_binds_method), | |
317 _dmf_adapter_lsb = 0x20, | |
318 _DMF_ADAPTER_MASK = (_dmf_adapter_lsb << CONV_OP_LIMIT) - _dmf_adapter_lsb | |
319 }; | |
320 static methodOop decode_method(oop x, klassOop& receiver_limit_result, int& decode_flags_result); | |
321 enum { | |
322 // format of query to getConstant: | |
323 GC_JVM_PUSH_LIMIT = 0, | |
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324 GC_JVM_STACK_MOVE_UNIT = 1, |
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325 GC_CONV_OP_IMPLEMENTED_MASK = 2, |
710 | 326 |
327 // format of result from getTarget / encode_target: | |
328 ETF_HANDLE_OR_METHOD_NAME = 0, // all available data (immediate MH or method) | |
329 ETF_DIRECT_HANDLE = 1, // ultimate method handle (will be a DMH, may be self) | |
330 ETF_METHOD_NAME = 2, // ultimate method as MemberName | |
331 ETF_REFLECT_METHOD = 3 // ultimate method as java.lang.reflect object (sans refClass) | |
332 }; | |
333 static int get_named_constant(int which, Handle name_box, TRAPS); | |
334 static oop encode_target(Handle mh, int format, TRAPS); // report vmtarget (to Java code) | |
335 static bool class_cast_needed(klassOop src, klassOop dst); | |
336 | |
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337 static instanceKlassHandle resolve_instance_klass(oop java_mirror_oop, TRAPS); |
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338 static instanceKlassHandle resolve_instance_klass(jclass java_mirror_jh, TRAPS) { |
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339 return resolve_instance_klass(JNIHandles::resolve(java_mirror_jh), THREAD); |
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340 } |
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341 |
710 | 342 private: |
343 // These checkers operate on a pair of whole MethodTypes: | |
344 static const char* check_method_type_change(oop src_mtype, int src_beg, int src_end, | |
345 int insert_argnum, oop insert_type, | |
346 int change_argnum, oop change_type, | |
347 int delete_argnum, | |
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348 oop dst_mtype, int dst_beg, int dst_end, |
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349 bool raw = false); |
710 | 350 static const char* check_method_type_insertion(oop src_mtype, |
351 int insert_argnum, oop insert_type, | |
352 oop dst_mtype) { | |
353 oop no_ref = NULL; | |
354 return check_method_type_change(src_mtype, 0, -1, | |
355 insert_argnum, insert_type, | |
356 -1, no_ref, -1, dst_mtype, 0, -1); | |
357 } | |
358 static const char* check_method_type_conversion(oop src_mtype, | |
359 int change_argnum, oop change_type, | |
360 oop dst_mtype) { | |
361 oop no_ref = NULL; | |
362 return check_method_type_change(src_mtype, 0, -1, -1, no_ref, | |
363 change_argnum, change_type, | |
364 -1, dst_mtype, 0, -1); | |
365 } | |
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366 static const char* check_method_type_passthrough(oop src_mtype, oop dst_mtype, bool raw) { |
710 | 367 oop no_ref = NULL; |
368 return check_method_type_change(src_mtype, 0, -1, | |
369 -1, no_ref, -1, no_ref, -1, | |
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370 dst_mtype, 0, -1, raw); |
710 | 371 } |
372 | |
373 // These checkers operate on pairs of argument or return types: | |
374 static const char* check_argument_type_change(BasicType src_type, klassOop src_klass, | |
375 BasicType dst_type, klassOop dst_klass, | |
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376 int argnum, bool raw = false); |
710 | 377 |
378 static const char* check_argument_type_change(oop src_type, oop dst_type, | |
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379 int argnum, bool raw = false) { |
710 | 380 klassOop src_klass = NULL, dst_klass = NULL; |
381 BasicType src_bt = java_lang_Class::as_BasicType(src_type, &src_klass); | |
382 BasicType dst_bt = java_lang_Class::as_BasicType(dst_type, &dst_klass); | |
383 return check_argument_type_change(src_bt, src_klass, | |
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384 dst_bt, dst_klass, argnum, raw); |
710 | 385 } |
386 | |
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387 static const char* check_return_type_change(oop src_type, oop dst_type, bool raw = false) { |
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388 return check_argument_type_change(src_type, dst_type, -1, raw); |
710 | 389 } |
390 | |
391 static const char* check_return_type_change(BasicType src_type, klassOop src_klass, | |
392 BasicType dst_type, klassOop dst_klass) { | |
393 return check_argument_type_change(src_type, src_klass, dst_type, dst_klass, -1); | |
394 } | |
395 | |
396 static const char* check_method_receiver(methodOop m, klassOop passed_recv_type); | |
397 | |
398 // These verifiers can block, and will throw an error if the checking fails: | |
399 static void verify_vmslots(Handle mh, TRAPS); | |
400 static void verify_vmargslot(Handle mh, int argnum, int argslot, TRAPS); | |
401 | |
402 static void verify_method_type(methodHandle m, Handle mtype, | |
403 bool has_bound_oop, | |
404 KlassHandle bound_oop_type, | |
405 TRAPS); | |
406 | |
407 static void verify_method_signature(methodHandle m, Handle mtype, | |
408 int first_ptype_pos, | |
409 KlassHandle insert_ptype, TRAPS); | |
410 | |
411 static void verify_DirectMethodHandle(Handle mh, methodHandle m, TRAPS); | |
412 static void verify_BoundMethodHandle(Handle mh, Handle target, int argnum, | |
413 bool direct_to_method, TRAPS); | |
414 static void verify_BoundMethodHandle_with_receiver(Handle mh, methodHandle m, TRAPS); | |
415 static void verify_AdapterMethodHandle(Handle mh, int argnum, TRAPS); | |
416 | |
417 public: | |
418 | |
419 // Fill in the fields of a DirectMethodHandle mh. (MH.type must be pre-filled.) | |
420 static void init_DirectMethodHandle(Handle mh, methodHandle method, bool do_dispatch, TRAPS); | |
421 | |
422 // Fill in the fields of a BoundMethodHandle mh. (MH.type, BMH.argument must be pre-filled.) | |
423 static void init_BoundMethodHandle(Handle mh, Handle target, int argnum, TRAPS); | |
424 static void init_BoundMethodHandle_with_receiver(Handle mh, | |
425 methodHandle original_m, | |
426 KlassHandle receiver_limit, | |
427 int decode_flags, | |
428 TRAPS); | |
429 | |
430 // Fill in the fields of an AdapterMethodHandle mh. (MH.type must be pre-filled.) | |
431 static void init_AdapterMethodHandle(Handle mh, Handle target, int argnum, TRAPS); | |
432 | |
433 #ifdef ASSERT | |
434 static bool spot_check_entry_names(); | |
435 #endif | |
436 | |
437 private: | |
438 static methodHandle dispatch_decoded_method(methodHandle m, | |
439 KlassHandle receiver_limit, | |
440 int decode_flags, | |
441 KlassHandle receiver_klass, | |
442 TRAPS); | |
443 | |
444 static bool same_basic_type_for_arguments(BasicType src, BasicType dst, | |
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445 bool raw = false, |
710 | 446 bool for_return = false); |
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447 static bool same_basic_type_for_returns(BasicType src, BasicType dst, bool raw = false) { |
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448 return same_basic_type_for_arguments(src, dst, raw, true); |
710 | 449 } |
450 | |
451 enum { // arg_mask values | |
452 _INSERT_NO_MASK = -1, | |
453 _INSERT_REF_MASK = 0, | |
454 _INSERT_INT_MASK = 1, | |
455 _INSERT_LONG_MASK = 3 | |
456 }; | |
457 static void insert_arg_slots(MacroAssembler* _masm, | |
458 RegisterOrConstant arg_slots, | |
459 int arg_mask, | |
1304 | 460 Register argslot_reg, |
1503 | 461 Register temp_reg, Register temp2_reg, Register temp3_reg = noreg); |
710 | 462 |
463 static void remove_arg_slots(MacroAssembler* _masm, | |
464 RegisterOrConstant arg_slots, | |
1304 | 465 Register argslot_reg, |
1503 | 466 Register temp_reg, Register temp2_reg, Register temp3_reg = noreg); |
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467 |
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468 static void trace_method_handle(MacroAssembler* _masm, const char* adaptername) PRODUCT_RETURN; |
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469 |
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470 static Symbol* convert_to_signature(oop type_str, bool polymorphic, TRAPS); |
710 | 471 }; |
472 | |
473 | |
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474 // Access methods for the "entry" field of a java.lang.invoke.MethodHandle. |
710 | 475 // The field is primarily a jump target for compiled calls. |
476 // However, we squirrel away some nice pointers for other uses, | |
477 // just before the jump target. | |
478 // Aspects of a method handle entry: | |
479 // - from_compiled_entry - stub used when compiled code calls the MH | |
480 // - from_interpreted_entry - stub used when the interpreter calls the MH | |
481 // - type_checking_entry - stub for runtime casting between MHForm siblings (NYI) | |
482 class MethodHandleEntry { | |
483 public: | |
484 class Data { | |
485 friend class MethodHandleEntry; | |
486 size_t _total_size; // size including Data and code stub | |
487 MethodHandleEntry* _type_checking_entry; | |
488 address _from_interpreted_entry; | |
489 MethodHandleEntry* method_entry() { return (MethodHandleEntry*)(this + 1); } | |
490 }; | |
491 | |
492 Data* data() { return (Data*)this - 1; } | |
493 | |
494 address start_address() { return (address) data(); } | |
495 address end_address() { return start_address() + data()->_total_size; } | |
496 | |
497 address from_compiled_entry() { return (address) this; } | |
498 | |
499 address from_interpreted_entry() { return data()->_from_interpreted_entry; } | |
500 void set_from_interpreted_entry(address e) { data()->_from_interpreted_entry = e; } | |
501 | |
502 MethodHandleEntry* type_checking_entry() { return data()->_type_checking_entry; } | |
503 void set_type_checking_entry(MethodHandleEntry* e) { data()->_type_checking_entry = e; } | |
504 | |
505 void set_end_address(address end_addr) { | |
506 size_t total_size = end_addr - start_address(); | |
507 assert(total_size > 0 && total_size < 0x1000, "reasonable end address"); | |
508 data()->_total_size = total_size; | |
509 } | |
510 | |
511 // Compiler support: | |
512 static int from_interpreted_entry_offset_in_bytes() { | |
513 return (int)( offset_of(Data, _from_interpreted_entry) - sizeof(Data) ); | |
514 } | |
515 static int type_checking_entry_offset_in_bytes() { | |
516 return (int)( offset_of(Data, _from_interpreted_entry) - sizeof(Data) ); | |
517 } | |
518 | |
519 static address start_compiled_entry(MacroAssembler* _masm, | |
520 address interpreted_entry = NULL); | |
521 static MethodHandleEntry* finish_compiled_entry(MacroAssembler* masm, address start_addr); | |
522 }; | |
523 | |
524 address MethodHandles::from_compiled_entry(EntryKind ek) { return entry(ek)->from_compiled_entry(); } | |
525 address MethodHandles::from_interpreted_entry(EntryKind ek) { return entry(ek)->from_interpreted_entry(); } | |
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526 |
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527 |
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528 //------------------------------------------------------------------------------ |
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529 // MethodHandlesAdapterGenerator |
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530 // |
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531 class MethodHandlesAdapterGenerator : public StubCodeGenerator { |
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532 public: |
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533 MethodHandlesAdapterGenerator(CodeBuffer* code) : StubCodeGenerator(code) {} |
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534 |
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535 void generate(); |
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536 }; |
1972 | 537 |
538 #endif // SHARE_VM_PRIMS_METHODHANDLES_HPP |