Mercurial > hg > truffle
annotate src/share/vm/interpreter/bytecodes.hpp @ 2142:8012aa3ccede
4926272: methodOopDesc::method_from_bcp is unsafe
Reviewed-by: coleenp, jrose, kvn, dcubed
| author | never |
|---|---|
| date | Thu, 13 Jan 2011 22:15:41 -0800 |
| parents | f95d63e2154a |
| children | b92c45f2bc75 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2142 | 2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_INTERPRETER_BYTECODES_HPP |
| 26 #define SHARE_VM_INTERPRETER_BYTECODES_HPP | |
| 27 | |
| 28 #include "memory/allocation.hpp" | |
| 29 #include "utilities/top.hpp" | |
| 30 | |
| 0 | 31 // Bytecodes specifies all bytecodes used in the VM and |
| 32 // provides utility functions to get bytecode attributes. | |
| 33 | |
| 34 // NOTE: replicated in SA in vm/agent/sun/jvm/hotspot/interpreter/Bytecodes.java | |
| 35 class Bytecodes: AllStatic { | |
| 36 public: | |
| 37 enum Code { | |
| 38 _illegal = -1, | |
| 39 | |
| 40 // Java bytecodes | |
| 41 _nop = 0, // 0x00 | |
| 42 _aconst_null = 1, // 0x01 | |
| 43 _iconst_m1 = 2, // 0x02 | |
| 44 _iconst_0 = 3, // 0x03 | |
| 45 _iconst_1 = 4, // 0x04 | |
| 46 _iconst_2 = 5, // 0x05 | |
| 47 _iconst_3 = 6, // 0x06 | |
| 48 _iconst_4 = 7, // 0x07 | |
| 49 _iconst_5 = 8, // 0x08 | |
| 50 _lconst_0 = 9, // 0x09 | |
| 51 _lconst_1 = 10, // 0x0a | |
| 52 _fconst_0 = 11, // 0x0b | |
| 53 _fconst_1 = 12, // 0x0c | |
| 54 _fconst_2 = 13, // 0x0d | |
| 55 _dconst_0 = 14, // 0x0e | |
| 56 _dconst_1 = 15, // 0x0f | |
| 57 _bipush = 16, // 0x10 | |
| 58 _sipush = 17, // 0x11 | |
| 59 _ldc = 18, // 0x12 | |
| 60 _ldc_w = 19, // 0x13 | |
| 61 _ldc2_w = 20, // 0x14 | |
| 62 _iload = 21, // 0x15 | |
| 63 _lload = 22, // 0x16 | |
| 64 _fload = 23, // 0x17 | |
| 65 _dload = 24, // 0x18 | |
| 66 _aload = 25, // 0x19 | |
| 67 _iload_0 = 26, // 0x1a | |
| 68 _iload_1 = 27, // 0x1b | |
| 69 _iload_2 = 28, // 0x1c | |
| 70 _iload_3 = 29, // 0x1d | |
| 71 _lload_0 = 30, // 0x1e | |
| 72 _lload_1 = 31, // 0x1f | |
| 73 _lload_2 = 32, // 0x20 | |
| 74 _lload_3 = 33, // 0x21 | |
| 75 _fload_0 = 34, // 0x22 | |
| 76 _fload_1 = 35, // 0x23 | |
| 77 _fload_2 = 36, // 0x24 | |
| 78 _fload_3 = 37, // 0x25 | |
| 79 _dload_0 = 38, // 0x26 | |
| 80 _dload_1 = 39, // 0x27 | |
| 81 _dload_2 = 40, // 0x28 | |
| 82 _dload_3 = 41, // 0x29 | |
| 83 _aload_0 = 42, // 0x2a | |
| 84 _aload_1 = 43, // 0x2b | |
| 85 _aload_2 = 44, // 0x2c | |
| 86 _aload_3 = 45, // 0x2d | |
| 87 _iaload = 46, // 0x2e | |
| 88 _laload = 47, // 0x2f | |
| 89 _faload = 48, // 0x30 | |
| 90 _daload = 49, // 0x31 | |
| 91 _aaload = 50, // 0x32 | |
| 92 _baload = 51, // 0x33 | |
| 93 _caload = 52, // 0x34 | |
| 94 _saload = 53, // 0x35 | |
| 95 _istore = 54, // 0x36 | |
| 96 _lstore = 55, // 0x37 | |
| 97 _fstore = 56, // 0x38 | |
| 98 _dstore = 57, // 0x39 | |
| 99 _astore = 58, // 0x3a | |
| 100 _istore_0 = 59, // 0x3b | |
| 101 _istore_1 = 60, // 0x3c | |
| 102 _istore_2 = 61, // 0x3d | |
| 103 _istore_3 = 62, // 0x3e | |
| 104 _lstore_0 = 63, // 0x3f | |
| 105 _lstore_1 = 64, // 0x40 | |
| 106 _lstore_2 = 65, // 0x41 | |
| 107 _lstore_3 = 66, // 0x42 | |
| 108 _fstore_0 = 67, // 0x43 | |
| 109 _fstore_1 = 68, // 0x44 | |
| 110 _fstore_2 = 69, // 0x45 | |
| 111 _fstore_3 = 70, // 0x46 | |
| 112 _dstore_0 = 71, // 0x47 | |
| 113 _dstore_1 = 72, // 0x48 | |
| 114 _dstore_2 = 73, // 0x49 | |
| 115 _dstore_3 = 74, // 0x4a | |
| 116 _astore_0 = 75, // 0x4b | |
| 117 _astore_1 = 76, // 0x4c | |
| 118 _astore_2 = 77, // 0x4d | |
| 119 _astore_3 = 78, // 0x4e | |
| 120 _iastore = 79, // 0x4f | |
| 121 _lastore = 80, // 0x50 | |
| 122 _fastore = 81, // 0x51 | |
| 123 _dastore = 82, // 0x52 | |
| 124 _aastore = 83, // 0x53 | |
| 125 _bastore = 84, // 0x54 | |
| 126 _castore = 85, // 0x55 | |
| 127 _sastore = 86, // 0x56 | |
| 128 _pop = 87, // 0x57 | |
| 129 _pop2 = 88, // 0x58 | |
| 130 _dup = 89, // 0x59 | |
| 131 _dup_x1 = 90, // 0x5a | |
| 132 _dup_x2 = 91, // 0x5b | |
| 133 _dup2 = 92, // 0x5c | |
| 134 _dup2_x1 = 93, // 0x5d | |
| 135 _dup2_x2 = 94, // 0x5e | |
| 136 _swap = 95, // 0x5f | |
| 137 _iadd = 96, // 0x60 | |
| 138 _ladd = 97, // 0x61 | |
| 139 _fadd = 98, // 0x62 | |
| 140 _dadd = 99, // 0x63 | |
| 141 _isub = 100, // 0x64 | |
| 142 _lsub = 101, // 0x65 | |
| 143 _fsub = 102, // 0x66 | |
| 144 _dsub = 103, // 0x67 | |
| 145 _imul = 104, // 0x68 | |
| 146 _lmul = 105, // 0x69 | |
| 147 _fmul = 106, // 0x6a | |
| 148 _dmul = 107, // 0x6b | |
| 149 _idiv = 108, // 0x6c | |
| 150 _ldiv = 109, // 0x6d | |
| 151 _fdiv = 110, // 0x6e | |
| 152 _ddiv = 111, // 0x6f | |
| 153 _irem = 112, // 0x70 | |
| 154 _lrem = 113, // 0x71 | |
| 155 _frem = 114, // 0x72 | |
| 156 _drem = 115, // 0x73 | |
| 157 _ineg = 116, // 0x74 | |
| 158 _lneg = 117, // 0x75 | |
| 159 _fneg = 118, // 0x76 | |
| 160 _dneg = 119, // 0x77 | |
| 161 _ishl = 120, // 0x78 | |
| 162 _lshl = 121, // 0x79 | |
| 163 _ishr = 122, // 0x7a | |
| 164 _lshr = 123, // 0x7b | |
| 165 _iushr = 124, // 0x7c | |
| 166 _lushr = 125, // 0x7d | |
| 167 _iand = 126, // 0x7e | |
| 168 _land = 127, // 0x7f | |
| 169 _ior = 128, // 0x80 | |
| 170 _lor = 129, // 0x81 | |
| 171 _ixor = 130, // 0x82 | |
| 172 _lxor = 131, // 0x83 | |
| 173 _iinc = 132, // 0x84 | |
| 174 _i2l = 133, // 0x85 | |
| 175 _i2f = 134, // 0x86 | |
| 176 _i2d = 135, // 0x87 | |
| 177 _l2i = 136, // 0x88 | |
| 178 _l2f = 137, // 0x89 | |
| 179 _l2d = 138, // 0x8a | |
| 180 _f2i = 139, // 0x8b | |
| 181 _f2l = 140, // 0x8c | |
| 182 _f2d = 141, // 0x8d | |
| 183 _d2i = 142, // 0x8e | |
| 184 _d2l = 143, // 0x8f | |
| 185 _d2f = 144, // 0x90 | |
| 186 _i2b = 145, // 0x91 | |
| 187 _i2c = 146, // 0x92 | |
| 188 _i2s = 147, // 0x93 | |
| 189 _lcmp = 148, // 0x94 | |
| 190 _fcmpl = 149, // 0x95 | |
| 191 _fcmpg = 150, // 0x96 | |
| 192 _dcmpl = 151, // 0x97 | |
| 193 _dcmpg = 152, // 0x98 | |
| 194 _ifeq = 153, // 0x99 | |
| 195 _ifne = 154, // 0x9a | |
| 196 _iflt = 155, // 0x9b | |
| 197 _ifge = 156, // 0x9c | |
| 198 _ifgt = 157, // 0x9d | |
| 199 _ifle = 158, // 0x9e | |
| 200 _if_icmpeq = 159, // 0x9f | |
| 201 _if_icmpne = 160, // 0xa0 | |
| 202 _if_icmplt = 161, // 0xa1 | |
| 203 _if_icmpge = 162, // 0xa2 | |
| 204 _if_icmpgt = 163, // 0xa3 | |
| 205 _if_icmple = 164, // 0xa4 | |
| 206 _if_acmpeq = 165, // 0xa5 | |
| 207 _if_acmpne = 166, // 0xa6 | |
| 208 _goto = 167, // 0xa7 | |
| 209 _jsr = 168, // 0xa8 | |
| 210 _ret = 169, // 0xa9 | |
| 211 _tableswitch = 170, // 0xaa | |
| 212 _lookupswitch = 171, // 0xab | |
| 213 _ireturn = 172, // 0xac | |
| 214 _lreturn = 173, // 0xad | |
| 215 _freturn = 174, // 0xae | |
| 216 _dreturn = 175, // 0xaf | |
| 217 _areturn = 176, // 0xb0 | |
| 218 _return = 177, // 0xb1 | |
| 219 _getstatic = 178, // 0xb2 | |
| 220 _putstatic = 179, // 0xb3 | |
| 221 _getfield = 180, // 0xb4 | |
| 222 _putfield = 181, // 0xb5 | |
| 223 _invokevirtual = 182, // 0xb6 | |
| 224 _invokespecial = 183, // 0xb7 | |
| 225 _invokestatic = 184, // 0xb8 | |
| 226 _invokeinterface = 185, // 0xb9 | |
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227 _invokedynamic = 186, // 0xba // if EnableInvokeDynamic |
| 0 | 228 _new = 187, // 0xbb |
| 229 _newarray = 188, // 0xbc | |
| 230 _anewarray = 189, // 0xbd | |
| 231 _arraylength = 190, // 0xbe | |
| 232 _athrow = 191, // 0xbf | |
| 233 _checkcast = 192, // 0xc0 | |
| 234 _instanceof = 193, // 0xc1 | |
| 235 _monitorenter = 194, // 0xc2 | |
| 236 _monitorexit = 195, // 0xc3 | |
| 237 _wide = 196, // 0xc4 | |
| 238 _multianewarray = 197, // 0xc5 | |
| 239 _ifnull = 198, // 0xc6 | |
| 240 _ifnonnull = 199, // 0xc7 | |
| 241 _goto_w = 200, // 0xc8 | |
| 242 _jsr_w = 201, // 0xc9 | |
| 243 _breakpoint = 202, // 0xca | |
| 244 | |
| 245 number_of_java_codes, | |
| 246 | |
| 247 // JVM bytecodes | |
| 248 _fast_agetfield = number_of_java_codes, | |
| 249 _fast_bgetfield , | |
| 250 _fast_cgetfield , | |
| 251 _fast_dgetfield , | |
| 252 _fast_fgetfield , | |
| 253 _fast_igetfield , | |
| 254 _fast_lgetfield , | |
| 255 _fast_sgetfield , | |
| 256 | |
| 257 _fast_aputfield , | |
| 258 _fast_bputfield , | |
| 259 _fast_cputfield , | |
| 260 _fast_dputfield , | |
| 261 _fast_fputfield , | |
| 262 _fast_iputfield , | |
| 263 _fast_lputfield , | |
| 264 _fast_sputfield , | |
| 265 | |
| 266 _fast_aload_0 , | |
| 267 _fast_iaccess_0 , | |
| 268 _fast_aaccess_0 , | |
| 269 _fast_faccess_0 , | |
| 270 | |
| 271 _fast_iload , | |
| 272 _fast_iload2 , | |
| 273 _fast_icaload , | |
| 274 | |
| 275 _fast_invokevfinal , | |
| 276 _fast_linearswitch , | |
| 277 _fast_binaryswitch , | |
| 278 | |
| 1602 | 279 // special handling of oop constants: |
| 280 _fast_aldc , | |
| 281 _fast_aldc_w , | |
| 282 | |
| 0 | 283 _return_register_finalizer , |
| 284 | |
| 285 _shouldnotreachhere, // For debugging | |
| 286 | |
| 287 // Platform specific JVM bytecodes | |
| 1972 | 288 #ifdef TARGET_ARCH_x86 |
| 289 # include "bytecodes_x86.hpp" | |
| 290 #endif | |
| 291 #ifdef TARGET_ARCH_sparc | |
| 292 # include "bytecodes_sparc.hpp" | |
| 293 #endif | |
| 294 #ifdef TARGET_ARCH_zero | |
| 295 # include "bytecodes_zero.hpp" | |
| 296 #endif | |
| 297 | |
| 0 | 298 |
| 299 number_of_codes | |
| 300 }; | |
| 301 | |
| 1565 | 302 // Flag bits derived from format strings, can_trap, can_rewrite, etc.: |
| 303 enum Flags { | |
| 304 // semantic flags: | |
| 305 _bc_can_trap = 1<<0, // bytecode execution can trap or block | |
| 306 _bc_can_rewrite = 1<<1, // bytecode execution has an alternate form | |
| 307 | |
| 308 // format bits (determined only by the format string): | |
| 309 _fmt_has_c = 1<<2, // constant, such as sipush "bcc" | |
| 310 _fmt_has_j = 1<<3, // constant pool cache index, such as getfield "bjj" | |
| 311 _fmt_has_k = 1<<4, // constant pool index, such as ldc "bk" | |
| 312 _fmt_has_i = 1<<5, // local index, such as iload | |
| 313 _fmt_has_o = 1<<6, // offset, such as ifeq | |
| 314 _fmt_has_nbo = 1<<7, // contains native-order field(s) | |
| 315 _fmt_has_u2 = 1<<8, // contains double-byte field(s) | |
| 316 _fmt_has_u4 = 1<<9, // contains quad-byte field | |
| 317 _fmt_not_variable = 1<<10, // not of variable length (simple or wide) | |
| 318 _fmt_not_simple = 1<<11, // either wide or variable length | |
| 319 _all_fmt_bits = (_fmt_not_simple*2 - _fmt_has_c), | |
| 320 | |
| 321 // Example derived format syndromes: | |
| 322 _fmt_b = _fmt_not_variable, | |
| 323 _fmt_bc = _fmt_b | _fmt_has_c, | |
| 324 _fmt_bi = _fmt_b | _fmt_has_i, | |
| 325 _fmt_bkk = _fmt_b | _fmt_has_k | _fmt_has_u2, | |
| 326 _fmt_bJJ = _fmt_b | _fmt_has_j | _fmt_has_u2 | _fmt_has_nbo, | |
| 327 _fmt_bo2 = _fmt_b | _fmt_has_o | _fmt_has_u2, | |
| 328 _fmt_bo4 = _fmt_b | _fmt_has_o | _fmt_has_u4 | |
| 329 }; | |
| 330 | |
| 0 | 331 private: |
| 332 static bool _is_initialized; | |
| 333 static const char* _name [number_of_codes]; | |
| 334 static BasicType _result_type [number_of_codes]; | |
| 335 static s_char _depth [number_of_codes]; | |
| 1565 | 336 static u_char _lengths [number_of_codes]; |
| 0 | 337 static Code _java_code [number_of_codes]; |
| 1565 | 338 static jchar _flags [(1<<BitsPerByte)*2]; // all second page for wide formats |
| 0 | 339 |
| 340 static void def(Code code, const char* name, const char* format, const char* wide_format, BasicType result_type, int depth, bool can_trap); | |
| 341 static void def(Code code, const char* name, const char* format, const char* wide_format, BasicType result_type, int depth, bool can_trap, Code java_code); | |
| 342 static void pd_initialize(); // platform specific initialization | |
| 343 static Code pd_base_code_for(Code code); // platform specific base_code_for implementation | |
| 344 | |
| 2142 | 345 // Verify that bcp points into method |
| 346 #ifdef ASSERT | |
| 347 static bool check_method(const methodOopDesc* method, address bcp); | |
| 348 #endif | |
| 349 static bool check_must_rewrite(Bytecodes::Code bc); | |
| 350 | |
| 0 | 351 public: |
| 352 // Conversion | |
| 353 static void check (Code code) { assert(is_defined(code), "illegal code"); } | |
| 354 static void wide_check (Code code) { assert(wide_is_defined(code), "illegal code"); } | |
| 355 static Code cast (int code) { return (Code)code; } | |
| 356 | |
| 357 | |
| 2142 | 358 // Fetch a bytecode, hiding breakpoints as necessary. The method |
| 359 // argument is used for conversion of breakpoints into the original | |
| 360 // bytecode. The CI uses these methods but guarantees that | |
| 361 // breakpoints are hidden so the method argument should be passed as | |
| 362 // NULL since in that case the bcp and methodOop are unrelated | |
| 363 // memory. | |
| 364 static Code code_at(const methodOopDesc* method, address bcp) { | |
| 365 assert(method == NULL || check_method(method, bcp), "bcp must point into method"); | |
| 366 Code code = cast(*bcp); | |
| 367 assert(code != _breakpoint || method != NULL, "need methodOop to decode breakpoint"); | |
| 368 return (code != _breakpoint) ? code : non_breakpoint_code_at(method, bcp); | |
| 369 } | |
| 370 static Code java_code_at(const methodOopDesc* method, address bcp) { | |
| 371 return java_code(code_at(method, bcp)); | |
| 372 } | |
| 0 | 373 |
| 2142 | 374 // Fetch a bytecode or a breakpoint: |
| 375 static Code code_or_bp_at(address bcp) { return (Code)cast(*bcp); } | |
| 0 | 376 |
| 2142 | 377 static Code code_at(methodOop method, int bci); |
| 378 static bool is_active_breakpoint_at(address bcp) { return (Code)*bcp == _breakpoint; } | |
| 0 | 379 |
| 2142 | 380 // find a bytecode, behind a breakpoint if necessary: |
| 381 static Code non_breakpoint_code_at(const methodOopDesc* method, address bcp); | |
| 0 | 382 |
| 383 // Bytecode attributes | |
| 1565 | 384 static bool is_defined (int code) { return 0 <= code && code < number_of_codes && flags(code, false) != 0; } |
| 385 static bool wide_is_defined(int code) { return is_defined(code) && flags(code, true) != 0; } | |
| 0 | 386 static const char* name (Code code) { check(code); return _name [code]; } |
| 387 static BasicType result_type (Code code) { check(code); return _result_type [code]; } | |
| 388 static int depth (Code code) { check(code); return _depth [code]; } | |
| 1570 | 389 // Note: Length functions must return <=0 for invalid bytecodes. |
| 390 // Calling check(code) in length functions would throw an unwanted assert. | |
| 391 static int length_for (Code code) { /*no check*/ return _lengths [code] & 0xF; } | |
| 392 static int wide_length_for(Code code) { /*no check*/ return _lengths [code] >> 4; } | |
| 1565 | 393 static bool can_trap (Code code) { check(code); return has_all_flags(code, _bc_can_trap, false); } |
| 0 | 394 static Code java_code (Code code) { check(code); return _java_code [code]; } |
| 1565 | 395 static bool can_rewrite (Code code) { check(code); return has_all_flags(code, _bc_can_rewrite, false); } |
| 2142 | 396 static bool must_rewrite(Bytecodes::Code code) { return can_rewrite(code) && check_must_rewrite(code); } |
| 1565 | 397 static bool native_byte_order(Code code) { check(code); return has_all_flags(code, _fmt_has_nbo, false); } |
| 398 static bool uses_cp_cache (Code code) { check(code); return has_all_flags(code, _fmt_has_j, false); } | |
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399 // if 'end' is provided, it indicates the end of the code buffer which |
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400 // should not be read past when parsing. |
| 2142 | 401 static int special_length_at(Bytecodes::Code code, address bcp, address end = NULL); |
| 402 static int special_length_at(methodOop method, address bcp, address end = NULL) { return special_length_at(code_at(method, bcp), bcp, end); } | |
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403 static int raw_special_length_at(address bcp, address end = NULL); |
| 2142 | 404 static int length_for_code_at(Bytecodes::Code code, address bcp) { int l = length_for(code); return l > 0 ? l : special_length_at(code, bcp); } |
| 405 static int length_at (methodOop method, address bcp) { return length_for_code_at(code_at(method, bcp), bcp); } | |
| 406 static int java_length_at (methodOop method, address bcp) { return length_for_code_at(java_code_at(method, bcp), bcp); } | |
| 0 | 407 static bool is_java_code (Code code) { return 0 <= code && code < number_of_java_codes; } |
| 408 | |
| 409 static bool is_aload (Code code) { return (code == _aload || code == _aload_0 || code == _aload_1 | |
| 410 || code == _aload_2 || code == _aload_3); } | |
| 411 static bool is_astore (Code code) { return (code == _astore || code == _astore_0 || code == _astore_1 | |
| 412 || code == _astore_2 || code == _astore_3); } | |
| 413 | |
| 414 static bool is_zero_const (Code code) { return (code == _aconst_null || code == _iconst_0 | |
| 415 || code == _fconst_0 || code == _dconst_0); } | |
| 1565 | 416 static int compute_flags (const char* format, int more_flags = 0); // compute the flags |
| 417 static int flags (int code, bool is_wide) { | |
| 418 assert(code == (u_char)code, "must be a byte"); | |
| 419 return _flags[code + (is_wide ? (1<<BitsPerByte) : 0)]; | |
| 420 } | |
| 421 static int format_bits (Code code, bool is_wide) { return flags(code, is_wide) & _all_fmt_bits; } | |
| 422 static bool has_all_flags (Code code, int test_flags, bool is_wide) { | |
| 423 return (flags(code, is_wide) & test_flags) == test_flags; | |
| 424 } | |
| 425 | |
| 0 | 426 // Initialization |
| 427 static void initialize (); | |
| 428 }; | |
| 1972 | 429 |
| 430 #endif // SHARE_VM_INTERPRETER_BYTECODES_HPP |