Sat, 17 Oct 2009 19:51:05 -0700
6815692: method handle code needs some cleanup (post-6655638)
Summary: correctly raise exceptions, support safe bitwise "raw" conversions, fix bugs revealed by VerifyMethodHandles, remove dead code, improve debugging support
Reviewed-by: never, twisti
jrose@1145 | 1 | /* |
jrose@1145 | 2 | * Copyright 2008-2009 Sun Microsystems, Inc. All Rights Reserved. |
jrose@1145 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
jrose@1145 | 4 | * |
jrose@1145 | 5 | * This code is free software; you can redistribute it and/or modify it |
jrose@1145 | 6 | * under the terms of the GNU General Public License version 2 only, as |
jrose@1145 | 7 | * published by the Free Software Foundation. |
jrose@1145 | 8 | * |
jrose@1145 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
jrose@1145 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
jrose@1145 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
jrose@1145 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
jrose@1145 | 13 | * accompanied this code). |
jrose@1145 | 14 | * |
jrose@1145 | 15 | * You should have received a copy of the GNU General Public License version |
jrose@1145 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
jrose@1145 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
jrose@1145 | 18 | * |
jrose@1145 | 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
jrose@1145 | 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
jrose@1145 | 21 | * have any questions. |
jrose@1145 | 22 | * |
jrose@1145 | 23 | */ |
jrose@1145 | 24 | |
jrose@1145 | 25 | class MacroAssembler; |
jrose@1145 | 26 | class Label; |
jrose@1145 | 27 | class MethodHandleEntry; |
jrose@1145 | 28 | |
jrose@1145 | 29 | class MethodHandles: AllStatic { |
jrose@1145 | 30 | // JVM support for MethodHandle, MethodType, and related types |
jrose@1145 | 31 | // in java.dyn and java.dyn.hotspot. |
jrose@1145 | 32 | // See also javaClasses for layouts java_dyn_Method{Handle,Type,Type::Form}. |
jrose@1145 | 33 | public: |
jrose@1145 | 34 | enum EntryKind { |
jrose@1474 | 35 | _raise_exception, // stub for error generation from other stubs |
jrose@1145 | 36 | _invokestatic_mh, // how a MH emulates invokestatic |
jrose@1145 | 37 | _invokespecial_mh, // ditto for the other invokes... |
jrose@1145 | 38 | _invokevirtual_mh, |
jrose@1145 | 39 | _invokeinterface_mh, |
jrose@1145 | 40 | _bound_ref_mh, // reference argument is bound |
jrose@1145 | 41 | _bound_int_mh, // int argument is bound (via an Integer or Float) |
jrose@1145 | 42 | _bound_long_mh, // long argument is bound (via a Long or Double) |
jrose@1145 | 43 | _bound_ref_direct_mh, // same as above, with direct linkage to methodOop |
jrose@1145 | 44 | _bound_int_direct_mh, |
jrose@1145 | 45 | _bound_long_direct_mh, |
jrose@1145 | 46 | |
jrose@1145 | 47 | _adapter_mh_first, // adapter sequence goes here... |
jrose@1145 | 48 | _adapter_retype_only = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_RETYPE_ONLY, |
jrose@1474 | 49 | _adapter_retype_raw = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_RETYPE_RAW, |
jrose@1145 | 50 | _adapter_check_cast = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_CHECK_CAST, |
jrose@1145 | 51 | _adapter_prim_to_prim = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_PRIM_TO_PRIM, |
jrose@1145 | 52 | _adapter_ref_to_prim = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_REF_TO_PRIM, |
jrose@1145 | 53 | _adapter_prim_to_ref = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_PRIM_TO_REF, |
jrose@1145 | 54 | _adapter_swap_args = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_SWAP_ARGS, |
jrose@1145 | 55 | _adapter_rot_args = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_ROT_ARGS, |
jrose@1145 | 56 | _adapter_dup_args = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_DUP_ARGS, |
jrose@1145 | 57 | _adapter_drop_args = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_DROP_ARGS, |
jrose@1145 | 58 | _adapter_collect_args = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_COLLECT_ARGS, |
jrose@1145 | 59 | _adapter_spread_args = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_SPREAD_ARGS, |
jrose@1145 | 60 | _adapter_flyby = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_FLYBY, |
jrose@1145 | 61 | _adapter_ricochet = _adapter_mh_first + sun_dyn_AdapterMethodHandle::OP_RICOCHET, |
jrose@1145 | 62 | _adapter_mh_last = _adapter_mh_first + sun_dyn_AdapterMethodHandle::CONV_OP_LIMIT - 1, |
jrose@1145 | 63 | |
jrose@1145 | 64 | // Optimized adapter types |
jrose@1145 | 65 | |
jrose@1145 | 66 | // argument list reordering |
jrose@1145 | 67 | _adapter_opt_swap_1, |
jrose@1145 | 68 | _adapter_opt_swap_2, |
jrose@1145 | 69 | _adapter_opt_rot_1_up, |
jrose@1145 | 70 | _adapter_opt_rot_1_down, |
jrose@1145 | 71 | _adapter_opt_rot_2_up, |
jrose@1145 | 72 | _adapter_opt_rot_2_down, |
jrose@1145 | 73 | // primitive single to single: |
jrose@1145 | 74 | _adapter_opt_i2i, // i2c, i2z, i2b, i2s |
jrose@1145 | 75 | // primitive double to single: |
jrose@1145 | 76 | _adapter_opt_l2i, |
jrose@1145 | 77 | _adapter_opt_d2f, |
jrose@1145 | 78 | // primitive single to double: |
jrose@1145 | 79 | _adapter_opt_i2l, |
jrose@1145 | 80 | _adapter_opt_f2d, |
jrose@1145 | 81 | // conversion between floating point and integer type is handled by Java |
jrose@1145 | 82 | |
jrose@1145 | 83 | // reference to primitive: |
jrose@1145 | 84 | _adapter_opt_unboxi, |
jrose@1145 | 85 | _adapter_opt_unboxl, |
jrose@1145 | 86 | |
jrose@1145 | 87 | // spreading (array length cases 0, 1, >=2) |
jrose@1145 | 88 | _adapter_opt_spread_0, |
jrose@1145 | 89 | _adapter_opt_spread_1, |
jrose@1145 | 90 | _adapter_opt_spread_more, |
jrose@1145 | 91 | |
jrose@1145 | 92 | _EK_LIMIT, |
jrose@1145 | 93 | _EK_FIRST = 0 |
jrose@1145 | 94 | }; |
jrose@1145 | 95 | |
jrose@1145 | 96 | public: |
jrose@1145 | 97 | static bool enabled() { return _enabled; } |
jrose@1145 | 98 | static void set_enabled(bool z); |
jrose@1145 | 99 | |
jrose@1145 | 100 | private: |
jrose@1145 | 101 | enum { // import sun_dyn_AdapterMethodHandle::CONV_OP_* |
jrose@1145 | 102 | CONV_OP_LIMIT = sun_dyn_AdapterMethodHandle::CONV_OP_LIMIT, |
jrose@1145 | 103 | CONV_OP_MASK = sun_dyn_AdapterMethodHandle::CONV_OP_MASK, |
jrose@1145 | 104 | CONV_VMINFO_MASK = sun_dyn_AdapterMethodHandle::CONV_VMINFO_MASK, |
jrose@1145 | 105 | CONV_VMINFO_SHIFT = sun_dyn_AdapterMethodHandle::CONV_VMINFO_SHIFT, |
jrose@1145 | 106 | CONV_OP_SHIFT = sun_dyn_AdapterMethodHandle::CONV_OP_SHIFT, |
jrose@1145 | 107 | CONV_DEST_TYPE_SHIFT = sun_dyn_AdapterMethodHandle::CONV_DEST_TYPE_SHIFT, |
jrose@1145 | 108 | CONV_SRC_TYPE_SHIFT = sun_dyn_AdapterMethodHandle::CONV_SRC_TYPE_SHIFT, |
jrose@1145 | 109 | CONV_STACK_MOVE_SHIFT = sun_dyn_AdapterMethodHandle::CONV_STACK_MOVE_SHIFT, |
jrose@1145 | 110 | CONV_STACK_MOVE_MASK = sun_dyn_AdapterMethodHandle::CONV_STACK_MOVE_MASK |
jrose@1145 | 111 | }; |
jrose@1145 | 112 | |
jrose@1145 | 113 | static bool _enabled; |
jrose@1145 | 114 | static MethodHandleEntry* _entries[_EK_LIMIT]; |
jrose@1145 | 115 | static const char* _entry_names[_EK_LIMIT+1]; |
jrose@1474 | 116 | static jobject _raise_exception_method; |
jrose@1474 | 117 | |
jrose@1145 | 118 | static bool ek_valid(EntryKind ek) { return (uint)ek < (uint)_EK_LIMIT; } |
jrose@1145 | 119 | static bool conv_op_valid(int op) { return (uint)op < (uint)CONV_OP_LIMIT; } |
jrose@1145 | 120 | |
jrose@1145 | 121 | public: |
jrose@1145 | 122 | static bool have_entry(EntryKind ek) { return ek_valid(ek) && _entries[ek] != NULL; } |
jrose@1145 | 123 | static MethodHandleEntry* entry(EntryKind ek) { assert(ek_valid(ek), "initialized"); |
jrose@1145 | 124 | return _entries[ek]; } |
jrose@1145 | 125 | static const char* entry_name(EntryKind ek) { assert(ek_valid(ek), "oob"); |
jrose@1145 | 126 | return _entry_names[ek]; } |
jrose@1145 | 127 | static EntryKind adapter_entry_kind(int op) { assert(conv_op_valid(op), "oob"); |
jrose@1145 | 128 | return EntryKind(_adapter_mh_first + op); } |
jrose@1145 | 129 | |
jrose@1145 | 130 | static void init_entry(EntryKind ek, MethodHandleEntry* me) { |
jrose@1145 | 131 | assert(ek_valid(ek), "oob"); |
jrose@1145 | 132 | assert(_entries[ek] == NULL, "no double initialization"); |
jrose@1145 | 133 | _entries[ek] = me; |
jrose@1145 | 134 | } |
jrose@1145 | 135 | |
jrose@1474 | 136 | static methodOop raise_exception_method() { |
jrose@1474 | 137 | oop rem = JNIHandles::resolve(_raise_exception_method); |
jrose@1474 | 138 | assert(rem == NULL || rem->is_method(), ""); |
jrose@1474 | 139 | return (methodOop) rem; |
jrose@1474 | 140 | } |
jrose@1474 | 141 | static void set_raise_exception_method(methodOop rem) { |
jrose@1474 | 142 | assert(_raise_exception_method == NULL, ""); |
jrose@1474 | 143 | _raise_exception_method = JNIHandles::make_global(Handle(rem)); |
jrose@1474 | 144 | } |
jrose@1474 | 145 | |
jrose@1145 | 146 | static jint adapter_conversion(int conv_op, BasicType src, BasicType dest, |
jrose@1145 | 147 | int stack_move = 0, int vminfo = 0) { |
jrose@1145 | 148 | assert(conv_op_valid(conv_op), "oob"); |
jrose@1145 | 149 | jint conv = ((conv_op << CONV_OP_SHIFT) |
jrose@1145 | 150 | | (src << CONV_SRC_TYPE_SHIFT) |
jrose@1145 | 151 | | (dest << CONV_DEST_TYPE_SHIFT) |
jrose@1145 | 152 | | (stack_move << CONV_STACK_MOVE_SHIFT) |
jrose@1145 | 153 | | (vminfo << CONV_VMINFO_SHIFT) |
jrose@1145 | 154 | ); |
jrose@1145 | 155 | assert(adapter_conversion_op(conv) == conv_op, "decode conv_op"); |
jrose@1145 | 156 | assert(adapter_conversion_src_type(conv) == src, "decode src"); |
jrose@1145 | 157 | assert(adapter_conversion_dest_type(conv) == dest, "decode dest"); |
jrose@1145 | 158 | assert(adapter_conversion_stack_move(conv) == stack_move, "decode stack_move"); |
jrose@1145 | 159 | assert(adapter_conversion_vminfo(conv) == vminfo, "decode vminfo"); |
jrose@1145 | 160 | return conv; |
jrose@1145 | 161 | } |
jrose@1145 | 162 | static int adapter_conversion_op(jint conv) { |
jrose@1145 | 163 | return ((conv >> CONV_OP_SHIFT) & 0xF); |
jrose@1145 | 164 | } |
jrose@1145 | 165 | static BasicType adapter_conversion_src_type(jint conv) { |
jrose@1145 | 166 | return (BasicType)((conv >> CONV_SRC_TYPE_SHIFT) & 0xF); |
jrose@1145 | 167 | } |
jrose@1145 | 168 | static BasicType adapter_conversion_dest_type(jint conv) { |
jrose@1145 | 169 | return (BasicType)((conv >> CONV_DEST_TYPE_SHIFT) & 0xF); |
jrose@1145 | 170 | } |
jrose@1145 | 171 | static int adapter_conversion_stack_move(jint conv) { |
jrose@1145 | 172 | return (conv >> CONV_STACK_MOVE_SHIFT); |
jrose@1145 | 173 | } |
jrose@1145 | 174 | static int adapter_conversion_vminfo(jint conv) { |
jrose@1145 | 175 | return (conv >> CONV_VMINFO_SHIFT) & CONV_VMINFO_MASK; |
jrose@1145 | 176 | } |
jrose@1145 | 177 | |
jrose@1145 | 178 | // Offset in words that the interpreter stack pointer moves when an argument is pushed. |
jrose@1145 | 179 | // The stack_move value must always be a multiple of this. |
jrose@1145 | 180 | static int stack_move_unit() { |
jrose@1145 | 181 | return frame::interpreter_frame_expression_stack_direction() * Interpreter::stackElementWords(); |
jrose@1145 | 182 | } |
jrose@1145 | 183 | |
jrose@1145 | 184 | enum { CONV_VMINFO_SIGN_FLAG = 0x80 }; |
jrose@1145 | 185 | static int adapter_subword_vminfo(BasicType dest) { |
jrose@1145 | 186 | if (dest == T_BOOLEAN) return (BitsPerInt - 1); |
jrose@1145 | 187 | if (dest == T_CHAR) return (BitsPerInt - 16); |
jrose@1145 | 188 | if (dest == T_BYTE) return (BitsPerInt - 8) | CONV_VMINFO_SIGN_FLAG; |
jrose@1145 | 189 | if (dest == T_SHORT) return (BitsPerInt - 16) | CONV_VMINFO_SIGN_FLAG; |
jrose@1145 | 190 | return 0; // case T_INT |
jrose@1145 | 191 | } |
jrose@1145 | 192 | // Here is the transformation the i2i adapter must perform: |
jrose@1145 | 193 | static int truncate_subword_from_vminfo(jint value, int vminfo) { |
jrose@1145 | 194 | jint tem = value << vminfo; |
jrose@1145 | 195 | if ((vminfo & CONV_VMINFO_SIGN_FLAG) != 0) { |
jrose@1145 | 196 | return (jint)tem >> vminfo; |
jrose@1145 | 197 | } else { |
jrose@1145 | 198 | return (juint)tem >> vminfo; |
jrose@1145 | 199 | } |
jrose@1145 | 200 | } |
jrose@1145 | 201 | |
jrose@1145 | 202 | static inline address from_compiled_entry(EntryKind ek); |
jrose@1145 | 203 | static inline address from_interpreted_entry(EntryKind ek); |
jrose@1145 | 204 | |
jrose@1145 | 205 | // helpers for decode_method. |
jrose@1145 | 206 | static methodOop decode_methodOop(methodOop m, int& decode_flags_result); |
jrose@1145 | 207 | static methodOop decode_vmtarget(oop vmtarget, int vmindex, oop mtype, klassOop& receiver_limit_result, int& decode_flags_result); |
jrose@1145 | 208 | static methodOop decode_MemberName(oop mname, klassOop& receiver_limit_result, int& decode_flags_result); |
jrose@1145 | 209 | static methodOop decode_MethodHandle(oop mh, klassOop& receiver_limit_result, int& decode_flags_result); |
jrose@1145 | 210 | static methodOop decode_DirectMethodHandle(oop mh, klassOop& receiver_limit_result, int& decode_flags_result); |
jrose@1145 | 211 | static methodOop decode_BoundMethodHandle(oop mh, klassOop& receiver_limit_result, int& decode_flags_result); |
jrose@1145 | 212 | static methodOop decode_AdapterMethodHandle(oop mh, klassOop& receiver_limit_result, int& decode_flags_result); |
jrose@1145 | 213 | |
jrose@1145 | 214 | // Find out how many stack slots an mh pushes or pops. |
jrose@1145 | 215 | // The result is *not* reported as a multiple of stack_move_unit(); |
jrose@1145 | 216 | // It is a signed net number of pushes (a difference in vmslots). |
jrose@1145 | 217 | // To compare with a stack_move value, first multiply by stack_move_unit(). |
jrose@1145 | 218 | static int decode_MethodHandle_stack_pushes(oop mh); |
jrose@1145 | 219 | |
jrose@1145 | 220 | public: |
jrose@1145 | 221 | // working with member names |
jrose@1145 | 222 | static void resolve_MemberName(Handle mname, TRAPS); // compute vmtarget/vmindex from name/type |
jrose@1145 | 223 | static void expand_MemberName(Handle mname, int suppress, TRAPS); // expand defc/name/type if missing |
jrose@1145 | 224 | static void init_MemberName(oop mname_oop, oop target); // compute vmtarget/vmindex from target |
jrose@1145 | 225 | static void init_MemberName(oop mname_oop, methodOop m, bool do_dispatch); |
jrose@1145 | 226 | static void init_MemberName(oop mname_oop, klassOop field_holder, AccessFlags mods, int offset); |
jrose@1145 | 227 | static int find_MemberNames(klassOop k, symbolOop name, symbolOop sig, |
jrose@1145 | 228 | int mflags, klassOop caller, |
jrose@1145 | 229 | int skip, objArrayOop results); |
jrose@1145 | 230 | // bit values for suppress argument to expand_MemberName: |
jrose@1145 | 231 | enum { _suppress_defc = 1, _suppress_name = 2, _suppress_type = 4 }; |
jrose@1145 | 232 | |
jrose@1145 | 233 | // called from InterpreterGenerator and StubGenerator |
jrose@1145 | 234 | static address generate_method_handle_interpreter_entry(MacroAssembler* _masm); |
jrose@1145 | 235 | static void generate_method_handle_stub(MacroAssembler* _masm, EntryKind ek); |
jrose@1145 | 236 | |
jrose@1145 | 237 | // argument list parsing |
jrose@1145 | 238 | static int argument_slot(oop method_type, int arg); |
jrose@1145 | 239 | static int argument_slot_count(oop method_type) { return argument_slot(method_type, -1); } |
jrose@1145 | 240 | static int argument_slot_to_argnum(oop method_type, int argslot); |
jrose@1145 | 241 | |
jrose@1145 | 242 | // Runtime support |
jrose@1145 | 243 | enum { // bit-encoded flags from decode_method or decode_vmref |
jrose@1145 | 244 | _dmf_has_receiver = 0x01, // target method has leading reference argument |
jrose@1145 | 245 | _dmf_does_dispatch = 0x02, // method handle performs virtual or interface dispatch |
jrose@1145 | 246 | _dmf_from_interface = 0x04, // peforms interface dispatch |
jrose@1145 | 247 | _DMF_DIRECT_MASK = (_dmf_from_interface*2 - _dmf_has_receiver), |
jrose@1145 | 248 | _dmf_binds_method = 0x08, |
jrose@1145 | 249 | _dmf_binds_argument = 0x10, |
jrose@1145 | 250 | _DMF_BOUND_MASK = (_dmf_binds_argument*2 - _dmf_binds_method), |
jrose@1145 | 251 | _dmf_adapter_lsb = 0x20, |
jrose@1145 | 252 | _DMF_ADAPTER_MASK = (_dmf_adapter_lsb << CONV_OP_LIMIT) - _dmf_adapter_lsb |
jrose@1145 | 253 | }; |
jrose@1145 | 254 | static methodOop decode_method(oop x, klassOop& receiver_limit_result, int& decode_flags_result); |
jrose@1145 | 255 | enum { |
jrose@1145 | 256 | // format of query to getConstant: |
jrose@1145 | 257 | GC_JVM_PUSH_LIMIT = 0, |
jrose@1474 | 258 | GC_JVM_STACK_MOVE_UNIT = 1, |
jrose@1145 | 259 | |
jrose@1145 | 260 | // format of result from getTarget / encode_target: |
jrose@1145 | 261 | ETF_HANDLE_OR_METHOD_NAME = 0, // all available data (immediate MH or method) |
jrose@1145 | 262 | ETF_DIRECT_HANDLE = 1, // ultimate method handle (will be a DMH, may be self) |
jrose@1145 | 263 | ETF_METHOD_NAME = 2, // ultimate method as MemberName |
jrose@1145 | 264 | ETF_REFLECT_METHOD = 3 // ultimate method as java.lang.reflect object (sans refClass) |
jrose@1145 | 265 | }; |
jrose@1145 | 266 | static int get_named_constant(int which, Handle name_box, TRAPS); |
jrose@1145 | 267 | static oop encode_target(Handle mh, int format, TRAPS); // report vmtarget (to Java code) |
jrose@1145 | 268 | static bool class_cast_needed(klassOop src, klassOop dst); |
jrose@1145 | 269 | |
jrose@1145 | 270 | private: |
jrose@1145 | 271 | // These checkers operate on a pair of whole MethodTypes: |
jrose@1145 | 272 | static const char* check_method_type_change(oop src_mtype, int src_beg, int src_end, |
jrose@1145 | 273 | int insert_argnum, oop insert_type, |
jrose@1145 | 274 | int change_argnum, oop change_type, |
jrose@1145 | 275 | int delete_argnum, |
jrose@1474 | 276 | oop dst_mtype, int dst_beg, int dst_end, |
jrose@1474 | 277 | bool raw = false); |
jrose@1145 | 278 | static const char* check_method_type_insertion(oop src_mtype, |
jrose@1145 | 279 | int insert_argnum, oop insert_type, |
jrose@1145 | 280 | oop dst_mtype) { |
jrose@1145 | 281 | oop no_ref = NULL; |
jrose@1145 | 282 | return check_method_type_change(src_mtype, 0, -1, |
jrose@1145 | 283 | insert_argnum, insert_type, |
jrose@1145 | 284 | -1, no_ref, -1, dst_mtype, 0, -1); |
jrose@1145 | 285 | } |
jrose@1145 | 286 | static const char* check_method_type_conversion(oop src_mtype, |
jrose@1145 | 287 | int change_argnum, oop change_type, |
jrose@1145 | 288 | oop dst_mtype) { |
jrose@1145 | 289 | oop no_ref = NULL; |
jrose@1145 | 290 | return check_method_type_change(src_mtype, 0, -1, -1, no_ref, |
jrose@1145 | 291 | change_argnum, change_type, |
jrose@1145 | 292 | -1, dst_mtype, 0, -1); |
jrose@1145 | 293 | } |
jrose@1474 | 294 | static const char* check_method_type_passthrough(oop src_mtype, oop dst_mtype, bool raw) { |
jrose@1145 | 295 | oop no_ref = NULL; |
jrose@1145 | 296 | return check_method_type_change(src_mtype, 0, -1, |
jrose@1145 | 297 | -1, no_ref, -1, no_ref, -1, |
jrose@1474 | 298 | dst_mtype, 0, -1, raw); |
jrose@1145 | 299 | } |
jrose@1145 | 300 | |
jrose@1145 | 301 | // These checkers operate on pairs of argument or return types: |
jrose@1145 | 302 | static const char* check_argument_type_change(BasicType src_type, klassOop src_klass, |
jrose@1145 | 303 | BasicType dst_type, klassOop dst_klass, |
jrose@1474 | 304 | int argnum, bool raw = false); |
jrose@1145 | 305 | |
jrose@1145 | 306 | static const char* check_argument_type_change(oop src_type, oop dst_type, |
jrose@1474 | 307 | int argnum, bool raw = false) { |
jrose@1145 | 308 | klassOop src_klass = NULL, dst_klass = NULL; |
jrose@1145 | 309 | BasicType src_bt = java_lang_Class::as_BasicType(src_type, &src_klass); |
jrose@1145 | 310 | BasicType dst_bt = java_lang_Class::as_BasicType(dst_type, &dst_klass); |
jrose@1145 | 311 | return check_argument_type_change(src_bt, src_klass, |
jrose@1474 | 312 | dst_bt, dst_klass, argnum, raw); |
jrose@1145 | 313 | } |
jrose@1145 | 314 | |
jrose@1474 | 315 | static const char* check_return_type_change(oop src_type, oop dst_type, bool raw = false) { |
jrose@1474 | 316 | return check_argument_type_change(src_type, dst_type, -1, raw); |
jrose@1145 | 317 | } |
jrose@1145 | 318 | |
jrose@1145 | 319 | static const char* check_return_type_change(BasicType src_type, klassOop src_klass, |
jrose@1145 | 320 | BasicType dst_type, klassOop dst_klass) { |
jrose@1145 | 321 | return check_argument_type_change(src_type, src_klass, dst_type, dst_klass, -1); |
jrose@1145 | 322 | } |
jrose@1145 | 323 | |
jrose@1145 | 324 | static const char* check_method_receiver(methodOop m, klassOop passed_recv_type); |
jrose@1145 | 325 | |
jrose@1145 | 326 | // These verifiers can block, and will throw an error if the checking fails: |
jrose@1145 | 327 | static void verify_vmslots(Handle mh, TRAPS); |
jrose@1145 | 328 | static void verify_vmargslot(Handle mh, int argnum, int argslot, TRAPS); |
jrose@1145 | 329 | |
jrose@1145 | 330 | static void verify_method_type(methodHandle m, Handle mtype, |
jrose@1145 | 331 | bool has_bound_oop, |
jrose@1145 | 332 | KlassHandle bound_oop_type, |
jrose@1145 | 333 | TRAPS); |
jrose@1145 | 334 | |
jrose@1145 | 335 | static void verify_method_signature(methodHandle m, Handle mtype, |
jrose@1145 | 336 | int first_ptype_pos, |
jrose@1145 | 337 | KlassHandle insert_ptype, TRAPS); |
jrose@1145 | 338 | |
jrose@1145 | 339 | static void verify_DirectMethodHandle(Handle mh, methodHandle m, TRAPS); |
jrose@1145 | 340 | static void verify_BoundMethodHandle(Handle mh, Handle target, int argnum, |
jrose@1145 | 341 | bool direct_to_method, TRAPS); |
jrose@1145 | 342 | static void verify_BoundMethodHandle_with_receiver(Handle mh, methodHandle m, TRAPS); |
jrose@1145 | 343 | static void verify_AdapterMethodHandle(Handle mh, int argnum, TRAPS); |
jrose@1145 | 344 | |
jrose@1145 | 345 | public: |
jrose@1145 | 346 | |
jrose@1145 | 347 | // Fill in the fields of a DirectMethodHandle mh. (MH.type must be pre-filled.) |
jrose@1145 | 348 | static void init_DirectMethodHandle(Handle mh, methodHandle method, bool do_dispatch, TRAPS); |
jrose@1145 | 349 | |
jrose@1145 | 350 | // Fill in the fields of a BoundMethodHandle mh. (MH.type, BMH.argument must be pre-filled.) |
jrose@1145 | 351 | static void init_BoundMethodHandle(Handle mh, Handle target, int argnum, TRAPS); |
jrose@1145 | 352 | static void init_BoundMethodHandle_with_receiver(Handle mh, |
jrose@1145 | 353 | methodHandle original_m, |
jrose@1145 | 354 | KlassHandle receiver_limit, |
jrose@1145 | 355 | int decode_flags, |
jrose@1145 | 356 | TRAPS); |
jrose@1145 | 357 | |
jrose@1145 | 358 | // Fill in the fields of an AdapterMethodHandle mh. (MH.type must be pre-filled.) |
jrose@1145 | 359 | static void init_AdapterMethodHandle(Handle mh, Handle target, int argnum, TRAPS); |
jrose@1145 | 360 | |
jrose@1145 | 361 | #ifdef ASSERT |
jrose@1145 | 362 | static bool spot_check_entry_names(); |
jrose@1145 | 363 | #endif |
jrose@1145 | 364 | |
jrose@1145 | 365 | private: |
jrose@1145 | 366 | static methodHandle dispatch_decoded_method(methodHandle m, |
jrose@1145 | 367 | KlassHandle receiver_limit, |
jrose@1145 | 368 | int decode_flags, |
jrose@1145 | 369 | KlassHandle receiver_klass, |
jrose@1145 | 370 | TRAPS); |
jrose@1145 | 371 | |
jrose@1145 | 372 | static bool same_basic_type_for_arguments(BasicType src, BasicType dst, |
jrose@1474 | 373 | bool raw = false, |
jrose@1145 | 374 | bool for_return = false); |
jrose@1474 | 375 | static bool same_basic_type_for_returns(BasicType src, BasicType dst, bool raw = false) { |
jrose@1474 | 376 | return same_basic_type_for_arguments(src, dst, raw, true); |
jrose@1145 | 377 | } |
jrose@1145 | 378 | |
jrose@1145 | 379 | enum { // arg_mask values |
jrose@1145 | 380 | _INSERT_NO_MASK = -1, |
jrose@1145 | 381 | _INSERT_REF_MASK = 0, |
jrose@1145 | 382 | _INSERT_INT_MASK = 1, |
jrose@1145 | 383 | _INSERT_LONG_MASK = 3 |
jrose@1145 | 384 | }; |
jrose@1145 | 385 | static void insert_arg_slots(MacroAssembler* _masm, |
jrose@1145 | 386 | RegisterOrConstant arg_slots, |
jrose@1145 | 387 | int arg_mask, |
jrose@1145 | 388 | Register rax_argslot, |
jrose@1145 | 389 | Register rbx_temp, Register rdx_temp); |
jrose@1145 | 390 | |
jrose@1145 | 391 | static void remove_arg_slots(MacroAssembler* _masm, |
jrose@1145 | 392 | RegisterOrConstant arg_slots, |
jrose@1145 | 393 | Register rax_argslot, |
jrose@1145 | 394 | Register rbx_temp, Register rdx_temp); |
jrose@1145 | 395 | }; |
jrose@1145 | 396 | |
jrose@1145 | 397 | |
jrose@1145 | 398 | // Access methods for the "entry" field of a java.dyn.MethodHandle. |
jrose@1145 | 399 | // The field is primarily a jump target for compiled calls. |
jrose@1145 | 400 | // However, we squirrel away some nice pointers for other uses, |
jrose@1145 | 401 | // just before the jump target. |
jrose@1145 | 402 | // Aspects of a method handle entry: |
jrose@1145 | 403 | // - from_compiled_entry - stub used when compiled code calls the MH |
jrose@1145 | 404 | // - from_interpreted_entry - stub used when the interpreter calls the MH |
jrose@1145 | 405 | // - type_checking_entry - stub for runtime casting between MHForm siblings (NYI) |
jrose@1145 | 406 | class MethodHandleEntry { |
jrose@1145 | 407 | public: |
jrose@1145 | 408 | class Data { |
jrose@1145 | 409 | friend class MethodHandleEntry; |
jrose@1145 | 410 | size_t _total_size; // size including Data and code stub |
jrose@1145 | 411 | MethodHandleEntry* _type_checking_entry; |
jrose@1145 | 412 | address _from_interpreted_entry; |
jrose@1145 | 413 | MethodHandleEntry* method_entry() { return (MethodHandleEntry*)(this + 1); } |
jrose@1145 | 414 | }; |
jrose@1145 | 415 | |
jrose@1145 | 416 | Data* data() { return (Data*)this - 1; } |
jrose@1145 | 417 | |
jrose@1145 | 418 | address start_address() { return (address) data(); } |
jrose@1145 | 419 | address end_address() { return start_address() + data()->_total_size; } |
jrose@1145 | 420 | |
jrose@1145 | 421 | address from_compiled_entry() { return (address) this; } |
jrose@1145 | 422 | |
jrose@1145 | 423 | address from_interpreted_entry() { return data()->_from_interpreted_entry; } |
jrose@1145 | 424 | void set_from_interpreted_entry(address e) { data()->_from_interpreted_entry = e; } |
jrose@1145 | 425 | |
jrose@1145 | 426 | MethodHandleEntry* type_checking_entry() { return data()->_type_checking_entry; } |
jrose@1145 | 427 | void set_type_checking_entry(MethodHandleEntry* e) { data()->_type_checking_entry = e; } |
jrose@1145 | 428 | |
jrose@1145 | 429 | void set_end_address(address end_addr) { |
jrose@1145 | 430 | size_t total_size = end_addr - start_address(); |
jrose@1145 | 431 | assert(total_size > 0 && total_size < 0x1000, "reasonable end address"); |
jrose@1145 | 432 | data()->_total_size = total_size; |
jrose@1145 | 433 | } |
jrose@1145 | 434 | |
jrose@1145 | 435 | // Compiler support: |
jrose@1145 | 436 | static int from_interpreted_entry_offset_in_bytes() { |
jrose@1145 | 437 | return (int)( offset_of(Data, _from_interpreted_entry) - sizeof(Data) ); |
jrose@1145 | 438 | } |
jrose@1145 | 439 | static int type_checking_entry_offset_in_bytes() { |
jrose@1145 | 440 | return (int)( offset_of(Data, _from_interpreted_entry) - sizeof(Data) ); |
jrose@1145 | 441 | } |
jrose@1145 | 442 | |
jrose@1145 | 443 | static address start_compiled_entry(MacroAssembler* _masm, |
jrose@1145 | 444 | address interpreted_entry = NULL); |
jrose@1145 | 445 | static MethodHandleEntry* finish_compiled_entry(MacroAssembler* masm, address start_addr); |
jrose@1145 | 446 | }; |
jrose@1145 | 447 | |
jrose@1145 | 448 | address MethodHandles::from_compiled_entry(EntryKind ek) { return entry(ek)->from_compiled_entry(); } |
jrose@1145 | 449 | address MethodHandles::from_interpreted_entry(EntryKind ek) { return entry(ek)->from_interpreted_entry(); } |