| 1 | /* |
| 2 | * SPDX-License-Identifier: MIT |
| 3 | * |
| 4 | * Copyright (C) 2010-2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 5 | * |
| 6 | * LTTng UST bytecode specializer. |
| 7 | */ |
| 8 | |
| 9 | #define _LGPL_SOURCE |
| 10 | #include <limits.h> |
| 11 | #include <stddef.h> |
| 12 | #include <stdint.h> |
| 13 | |
| 14 | #include <lttng/ust-utils.h> |
| 15 | |
| 16 | #include "context-internal.h" |
| 17 | #include "lttng-bytecode.h" |
| 18 | #include "lib/lttng-ust/events.h" |
| 19 | #include "common/macros.h" |
| 20 | #include "common/tracer.h" |
| 21 | |
| 22 | static int lttng_fls(int val) |
| 23 | { |
| 24 | int r = 32; |
| 25 | unsigned int x = (unsigned int) val; |
| 26 | |
| 27 | if (!x) |
| 28 | return 0; |
| 29 | if (!(x & 0xFFFF0000U)) { |
| 30 | x <<= 16; |
| 31 | r -= 16; |
| 32 | } |
| 33 | if (!(x & 0xFF000000U)) { |
| 34 | x <<= 8; |
| 35 | r -= 8; |
| 36 | } |
| 37 | if (!(x & 0xF0000000U)) { |
| 38 | x <<= 4; |
| 39 | r -= 4; |
| 40 | } |
| 41 | if (!(x & 0xC0000000U)) { |
| 42 | x <<= 2; |
| 43 | r -= 2; |
| 44 | } |
| 45 | if (!(x & 0x80000000U)) { |
| 46 | r -= 1; |
| 47 | } |
| 48 | return r; |
| 49 | } |
| 50 | |
| 51 | static int get_count_order(unsigned int count) |
| 52 | { |
| 53 | int order; |
| 54 | |
| 55 | order = lttng_fls(count) - 1; |
| 56 | if (count & (count - 1)) |
| 57 | order++; |
| 58 | return order; |
| 59 | } |
| 60 | |
| 61 | static ssize_t bytecode_reserve_data(struct bytecode_runtime *runtime, |
| 62 | size_t align, size_t len) |
| 63 | { |
| 64 | ssize_t ret; |
| 65 | size_t padding = lttng_ust_offset_align(runtime->data_len, align); |
| 66 | size_t new_len = runtime->data_len + padding + len; |
| 67 | size_t new_alloc_len = new_len; |
| 68 | size_t old_alloc_len = runtime->data_alloc_len; |
| 69 | |
| 70 | if (new_len > BYTECODE_MAX_DATA_LEN) |
| 71 | return -EINVAL; |
| 72 | |
| 73 | if (new_alloc_len > old_alloc_len) { |
| 74 | char *newptr; |
| 75 | |
| 76 | new_alloc_len = |
| 77 | max_t(size_t, 1U << get_count_order(new_alloc_len), old_alloc_len << 1); |
| 78 | newptr = realloc(runtime->data, new_alloc_len); |
| 79 | if (!newptr) |
| 80 | return -ENOMEM; |
| 81 | runtime->data = newptr; |
| 82 | /* We zero directly the memory from start of allocation. */ |
| 83 | memset(&runtime->data[old_alloc_len], 0, new_alloc_len - old_alloc_len); |
| 84 | runtime->data_alloc_len = new_alloc_len; |
| 85 | } |
| 86 | runtime->data_len += padding; |
| 87 | ret = runtime->data_len; |
| 88 | runtime->data_len += len; |
| 89 | return ret; |
| 90 | } |
| 91 | |
| 92 | static ssize_t bytecode_push_data(struct bytecode_runtime *runtime, |
| 93 | const void *p, size_t align, size_t len) |
| 94 | { |
| 95 | ssize_t offset; |
| 96 | |
| 97 | offset = bytecode_reserve_data(runtime, align, len); |
| 98 | if (offset < 0) |
| 99 | return -ENOMEM; |
| 100 | memcpy(&runtime->data[offset], p, len); |
| 101 | return offset; |
| 102 | } |
| 103 | |
| 104 | static int specialize_load_field(struct vstack_entry *stack_top, |
| 105 | struct load_op *insn) |
| 106 | { |
| 107 | int ret; |
| 108 | |
| 109 | switch (stack_top->load.type) { |
| 110 | case LOAD_OBJECT: |
| 111 | break; |
| 112 | case LOAD_ROOT_CONTEXT: |
| 113 | case LOAD_ROOT_APP_CONTEXT: |
| 114 | case LOAD_ROOT_PAYLOAD: |
| 115 | default: |
| 116 | dbg_printf("Bytecode warning: cannot load root, missing field name.\n"); |
| 117 | ret = -EINVAL; |
| 118 | goto end; |
| 119 | } |
| 120 | switch (stack_top->load.object_type) { |
| 121 | case OBJECT_TYPE_S8: |
| 122 | dbg_printf("op load field s8\n"); |
| 123 | stack_top->type = REG_S64; |
| 124 | if (!stack_top->load.rev_bo) |
| 125 | insn->op = BYTECODE_OP_LOAD_FIELD_S8; |
| 126 | break; |
| 127 | case OBJECT_TYPE_S16: |
| 128 | dbg_printf("op load field s16\n"); |
| 129 | stack_top->type = REG_S64; |
| 130 | if (!stack_top->load.rev_bo) |
| 131 | insn->op = BYTECODE_OP_LOAD_FIELD_S16; |
| 132 | break; |
| 133 | case OBJECT_TYPE_S32: |
| 134 | dbg_printf("op load field s32\n"); |
| 135 | stack_top->type = REG_S64; |
| 136 | if (!stack_top->load.rev_bo) |
| 137 | insn->op = BYTECODE_OP_LOAD_FIELD_S32; |
| 138 | break; |
| 139 | case OBJECT_TYPE_S64: |
| 140 | dbg_printf("op load field s64\n"); |
| 141 | stack_top->type = REG_S64; |
| 142 | if (!stack_top->load.rev_bo) |
| 143 | insn->op = BYTECODE_OP_LOAD_FIELD_S64; |
| 144 | break; |
| 145 | case OBJECT_TYPE_SIGNED_ENUM: |
| 146 | dbg_printf("op load field signed enumeration\n"); |
| 147 | stack_top->type = REG_PTR; |
| 148 | break; |
| 149 | case OBJECT_TYPE_U8: |
| 150 | dbg_printf("op load field u8\n"); |
| 151 | stack_top->type = REG_U64; |
| 152 | insn->op = BYTECODE_OP_LOAD_FIELD_U8; |
| 153 | break; |
| 154 | case OBJECT_TYPE_U16: |
| 155 | dbg_printf("op load field u16\n"); |
| 156 | stack_top->type = REG_U64; |
| 157 | if (!stack_top->load.rev_bo) |
| 158 | insn->op = BYTECODE_OP_LOAD_FIELD_U16; |
| 159 | break; |
| 160 | case OBJECT_TYPE_U32: |
| 161 | dbg_printf("op load field u32\n"); |
| 162 | stack_top->type = REG_U64; |
| 163 | if (!stack_top->load.rev_bo) |
| 164 | insn->op = BYTECODE_OP_LOAD_FIELD_U32; |
| 165 | break; |
| 166 | case OBJECT_TYPE_U64: |
| 167 | dbg_printf("op load field u64\n"); |
| 168 | stack_top->type = REG_U64; |
| 169 | if (!stack_top->load.rev_bo) |
| 170 | insn->op = BYTECODE_OP_LOAD_FIELD_U64; |
| 171 | break; |
| 172 | case OBJECT_TYPE_UNSIGNED_ENUM: |
| 173 | dbg_printf("op load field unsigned enumeration\n"); |
| 174 | stack_top->type = REG_PTR; |
| 175 | break; |
| 176 | case OBJECT_TYPE_DOUBLE: |
| 177 | stack_top->type = REG_DOUBLE; |
| 178 | insn->op = BYTECODE_OP_LOAD_FIELD_DOUBLE; |
| 179 | break; |
| 180 | case OBJECT_TYPE_STRING: |
| 181 | dbg_printf("op load field string\n"); |
| 182 | stack_top->type = REG_STRING; |
| 183 | insn->op = BYTECODE_OP_LOAD_FIELD_STRING; |
| 184 | break; |
| 185 | case OBJECT_TYPE_STRING_SEQUENCE: |
| 186 | dbg_printf("op load field string sequence\n"); |
| 187 | stack_top->type = REG_STRING; |
| 188 | insn->op = BYTECODE_OP_LOAD_FIELD_SEQUENCE; |
| 189 | break; |
| 190 | case OBJECT_TYPE_DYNAMIC: |
| 191 | dbg_printf("op load field dynamic\n"); |
| 192 | stack_top->type = REG_UNKNOWN; |
| 193 | /* Don't specialize load op. */ |
| 194 | break; |
| 195 | case OBJECT_TYPE_SEQUENCE: |
| 196 | case OBJECT_TYPE_ARRAY: |
| 197 | case OBJECT_TYPE_STRUCT: |
| 198 | case OBJECT_TYPE_VARIANT: |
| 199 | ERR("Sequences, arrays, struct and variant cannot be loaded (nested types)."); |
| 200 | ret = -EINVAL; |
| 201 | goto end; |
| 202 | } |
| 203 | return 0; |
| 204 | |
| 205 | end: |
| 206 | return ret; |
| 207 | } |
| 208 | |
| 209 | static int specialize_get_index_object_type(enum object_type *otype, |
| 210 | int signedness, uint32_t elem_len) |
| 211 | { |
| 212 | switch (elem_len) { |
| 213 | case 8: |
| 214 | if (signedness) |
| 215 | *otype = OBJECT_TYPE_S8; |
| 216 | else |
| 217 | *otype = OBJECT_TYPE_U8; |
| 218 | break; |
| 219 | case 16: |
| 220 | if (signedness) |
| 221 | *otype = OBJECT_TYPE_S16; |
| 222 | else |
| 223 | *otype = OBJECT_TYPE_U16; |
| 224 | break; |
| 225 | case 32: |
| 226 | if (signedness) |
| 227 | *otype = OBJECT_TYPE_S32; |
| 228 | else |
| 229 | *otype = OBJECT_TYPE_U32; |
| 230 | break; |
| 231 | case 64: |
| 232 | if (signedness) |
| 233 | *otype = OBJECT_TYPE_S64; |
| 234 | else |
| 235 | *otype = OBJECT_TYPE_U64; |
| 236 | break; |
| 237 | default: |
| 238 | return -EINVAL; |
| 239 | } |
| 240 | return 0; |
| 241 | } |
| 242 | |
| 243 | static int specialize_get_index(struct bytecode_runtime *runtime, |
| 244 | struct load_op *insn, uint64_t index, |
| 245 | struct vstack_entry *stack_top, |
| 246 | int idx_len) |
| 247 | { |
| 248 | int ret; |
| 249 | struct bytecode_get_index_data gid; |
| 250 | ssize_t data_offset; |
| 251 | |
| 252 | memset(&gid, 0, sizeof(gid)); |
| 253 | switch (stack_top->load.type) { |
| 254 | case LOAD_OBJECT: |
| 255 | switch (stack_top->load.object_type) { |
| 256 | case OBJECT_TYPE_ARRAY: |
| 257 | { |
| 258 | const struct lttng_ust_type_integer *integer_type; |
| 259 | const struct lttng_ust_event_field *field; |
| 260 | uint32_t elem_len, num_elems; |
| 261 | int signedness; |
| 262 | |
| 263 | field = stack_top->load.field; |
| 264 | switch (field->type->type) { |
| 265 | case lttng_ust_type_array: |
| 266 | if (lttng_ust_get_type_array(field->type)->elem_type->type != lttng_ust_type_integer) { |
| 267 | ret = -EINVAL; |
| 268 | goto end; |
| 269 | } |
| 270 | integer_type = lttng_ust_get_type_integer(lttng_ust_get_type_array(field->type)->elem_type); |
| 271 | num_elems = lttng_ust_get_type_array(field->type)->length; |
| 272 | break; |
| 273 | default: |
| 274 | ret = -EINVAL; |
| 275 | goto end; |
| 276 | } |
| 277 | elem_len = integer_type->size; |
| 278 | signedness = integer_type->signedness; |
| 279 | if (index >= num_elems) { |
| 280 | ret = -EINVAL; |
| 281 | goto end; |
| 282 | } |
| 283 | ret = specialize_get_index_object_type(&stack_top->load.object_type, |
| 284 | signedness, elem_len); |
| 285 | if (ret) |
| 286 | goto end; |
| 287 | gid.offset = index * (elem_len / CHAR_BIT); |
| 288 | gid.array_len = num_elems * (elem_len / CHAR_BIT); |
| 289 | gid.elem.type = stack_top->load.object_type; |
| 290 | gid.elem.len = elem_len; |
| 291 | if (integer_type->reverse_byte_order) |
| 292 | gid.elem.rev_bo = true; |
| 293 | stack_top->load.rev_bo = gid.elem.rev_bo; |
| 294 | break; |
| 295 | } |
| 296 | case OBJECT_TYPE_SEQUENCE: |
| 297 | { |
| 298 | const struct lttng_ust_type_integer *integer_type; |
| 299 | const struct lttng_ust_event_field *field; |
| 300 | uint32_t elem_len; |
| 301 | int signedness; |
| 302 | |
| 303 | field = stack_top->load.field; |
| 304 | switch (field->type->type) { |
| 305 | case lttng_ust_type_sequence: |
| 306 | if (lttng_ust_get_type_sequence(field->type)->elem_type->type != lttng_ust_type_integer) { |
| 307 | ret = -EINVAL; |
| 308 | goto end; |
| 309 | } |
| 310 | integer_type = lttng_ust_get_type_integer(lttng_ust_get_type_sequence(field->type)->elem_type); |
| 311 | break; |
| 312 | default: |
| 313 | ret = -EINVAL; |
| 314 | goto end; |
| 315 | } |
| 316 | elem_len = integer_type->size; |
| 317 | signedness = integer_type->signedness; |
| 318 | ret = specialize_get_index_object_type(&stack_top->load.object_type, |
| 319 | signedness, elem_len); |
| 320 | if (ret) |
| 321 | goto end; |
| 322 | gid.offset = index * (elem_len / CHAR_BIT); |
| 323 | gid.elem.type = stack_top->load.object_type; |
| 324 | gid.elem.len = elem_len; |
| 325 | if (integer_type->reverse_byte_order) |
| 326 | gid.elem.rev_bo = true; |
| 327 | stack_top->load.rev_bo = gid.elem.rev_bo; |
| 328 | break; |
| 329 | } |
| 330 | case OBJECT_TYPE_STRUCT: |
| 331 | /* Only generated by the specialize phase. */ |
| 332 | case OBJECT_TYPE_VARIANT: /* Fall-through */ |
| 333 | default: |
| 334 | ERR("Unexpected get index type %d", |
| 335 | (int) stack_top->load.object_type); |
| 336 | ret = -EINVAL; |
| 337 | goto end; |
| 338 | } |
| 339 | break; |
| 340 | case LOAD_ROOT_CONTEXT: |
| 341 | case LOAD_ROOT_APP_CONTEXT: |
| 342 | case LOAD_ROOT_PAYLOAD: |
| 343 | ERR("Index lookup for root field not implemented yet."); |
| 344 | ret = -EINVAL; |
| 345 | goto end; |
| 346 | } |
| 347 | data_offset = bytecode_push_data(runtime, &gid, |
| 348 | __alignof__(gid), sizeof(gid)); |
| 349 | if (data_offset < 0) { |
| 350 | ret = -EINVAL; |
| 351 | goto end; |
| 352 | } |
| 353 | switch (idx_len) { |
| 354 | case 2: |
| 355 | ((struct get_index_u16 *) insn->data)->index = data_offset; |
| 356 | break; |
| 357 | case 8: |
| 358 | ((struct get_index_u64 *) insn->data)->index = data_offset; |
| 359 | break; |
| 360 | default: |
| 361 | ret = -EINVAL; |
| 362 | goto end; |
| 363 | } |
| 364 | |
| 365 | return 0; |
| 366 | |
| 367 | end: |
| 368 | return ret; |
| 369 | } |
| 370 | |
| 371 | static int specialize_context_lookup_name(struct lttng_ust_ctx *ctx, |
| 372 | struct bytecode_runtime *bytecode, |
| 373 | struct load_op *insn) |
| 374 | { |
| 375 | uint16_t offset; |
| 376 | const char *name; |
| 377 | |
| 378 | offset = ((struct get_symbol *) insn->data)->offset; |
| 379 | name = bytecode->p.bc->bc.data + bytecode->p.bc->bc.reloc_offset + offset; |
| 380 | return lttng_get_context_index(ctx, name); |
| 381 | } |
| 382 | |
| 383 | static int specialize_load_object(const struct lttng_ust_event_field *field, |
| 384 | struct vstack_load *load, bool is_context) |
| 385 | { |
| 386 | load->type = LOAD_OBJECT; |
| 387 | |
| 388 | switch (field->type->type) { |
| 389 | case lttng_ust_type_integer: |
| 390 | if (lttng_ust_get_type_integer(field->type)->signedness) |
| 391 | load->object_type = OBJECT_TYPE_S64; |
| 392 | else |
| 393 | load->object_type = OBJECT_TYPE_U64; |
| 394 | load->rev_bo = false; |
| 395 | break; |
| 396 | case lttng_ust_type_enum: |
| 397 | { |
| 398 | const struct lttng_ust_type_integer *itype; |
| 399 | |
| 400 | itype = lttng_ust_get_type_integer(lttng_ust_get_type_enum(field->type)->container_type); |
| 401 | if (itype->signedness) |
| 402 | load->object_type = OBJECT_TYPE_SIGNED_ENUM; |
| 403 | else |
| 404 | load->object_type = OBJECT_TYPE_UNSIGNED_ENUM; |
| 405 | load->rev_bo = false; |
| 406 | break; |
| 407 | } |
| 408 | case lttng_ust_type_array: |
| 409 | if (lttng_ust_get_type_array(field->type)->elem_type->type != lttng_ust_type_integer) { |
| 410 | ERR("Array nesting only supports integer types."); |
| 411 | return -EINVAL; |
| 412 | } |
| 413 | if (is_context) { |
| 414 | load->object_type = OBJECT_TYPE_STRING; |
| 415 | } else { |
| 416 | if (lttng_ust_get_type_array(field->type)->encoding == lttng_ust_string_encoding_none) { |
| 417 | load->object_type = OBJECT_TYPE_ARRAY; |
| 418 | load->field = field; |
| 419 | } else { |
| 420 | load->object_type = OBJECT_TYPE_STRING_SEQUENCE; |
| 421 | } |
| 422 | } |
| 423 | break; |
| 424 | case lttng_ust_type_sequence: |
| 425 | if (lttng_ust_get_type_sequence(field->type)->elem_type->type != lttng_ust_type_integer) { |
| 426 | ERR("Sequence nesting only supports integer types."); |
| 427 | return -EINVAL; |
| 428 | } |
| 429 | if (is_context) { |
| 430 | load->object_type = OBJECT_TYPE_STRING; |
| 431 | } else { |
| 432 | if (lttng_ust_get_type_sequence(field->type)->encoding == lttng_ust_string_encoding_none) { |
| 433 | load->object_type = OBJECT_TYPE_SEQUENCE; |
| 434 | load->field = field; |
| 435 | } else { |
| 436 | load->object_type = OBJECT_TYPE_STRING_SEQUENCE; |
| 437 | } |
| 438 | } |
| 439 | break; |
| 440 | |
| 441 | case lttng_ust_type_string: |
| 442 | load->object_type = OBJECT_TYPE_STRING; |
| 443 | break; |
| 444 | case lttng_ust_type_float: |
| 445 | load->object_type = OBJECT_TYPE_DOUBLE; |
| 446 | break; |
| 447 | case lttng_ust_type_dynamic: |
| 448 | load->object_type = OBJECT_TYPE_DYNAMIC; |
| 449 | break; |
| 450 | default: |
| 451 | ERR("Unknown type: %d", (int) field->type->type); |
| 452 | return -EINVAL; |
| 453 | } |
| 454 | return 0; |
| 455 | } |
| 456 | |
| 457 | static int specialize_context_lookup(struct lttng_ust_ctx *ctx, |
| 458 | struct bytecode_runtime *runtime, |
| 459 | struct load_op *insn, |
| 460 | struct vstack_load *load) |
| 461 | { |
| 462 | int idx, ret; |
| 463 | const struct lttng_ust_ctx_field *ctx_field; |
| 464 | const struct lttng_ust_event_field *field; |
| 465 | struct bytecode_get_index_data gid; |
| 466 | ssize_t data_offset; |
| 467 | |
| 468 | idx = specialize_context_lookup_name(ctx, runtime, insn); |
| 469 | if (idx < 0) { |
| 470 | return -ENOENT; |
| 471 | } |
| 472 | ctx_field = &ctx->fields[idx]; |
| 473 | field = ctx_field->event_field; |
| 474 | ret = specialize_load_object(field, load, true); |
| 475 | if (ret) |
| 476 | return ret; |
| 477 | /* Specialize each get_symbol into a get_index. */ |
| 478 | insn->op = BYTECODE_OP_GET_INDEX_U16; |
| 479 | memset(&gid, 0, sizeof(gid)); |
| 480 | gid.ctx_index = idx; |
| 481 | gid.elem.type = load->object_type; |
| 482 | gid.elem.rev_bo = load->rev_bo; |
| 483 | gid.field = field; |
| 484 | data_offset = bytecode_push_data(runtime, &gid, |
| 485 | __alignof__(gid), sizeof(gid)); |
| 486 | if (data_offset < 0) { |
| 487 | return -EINVAL; |
| 488 | } |
| 489 | ((struct get_index_u16 *) insn->data)->index = data_offset; |
| 490 | return 0; |
| 491 | } |
| 492 | |
| 493 | static int specialize_app_context_lookup(struct lttng_ust_ctx **pctx, |
| 494 | struct bytecode_runtime *runtime, |
| 495 | struct load_op *insn, |
| 496 | struct vstack_load *load) |
| 497 | { |
| 498 | uint16_t offset; |
| 499 | const char *orig_name; |
| 500 | char *name = NULL; |
| 501 | int idx, ret; |
| 502 | const struct lttng_ust_ctx_field *ctx_field; |
| 503 | const struct lttng_ust_event_field *field; |
| 504 | struct bytecode_get_index_data gid; |
| 505 | ssize_t data_offset; |
| 506 | |
| 507 | offset = ((struct get_symbol *) insn->data)->offset; |
| 508 | orig_name = runtime->p.bc->bc.data + runtime->p.bc->bc.reloc_offset + offset; |
| 509 | name = zmalloc(strlen(orig_name) + strlen("$app.") + 1); |
| 510 | if (!name) { |
| 511 | ret = -ENOMEM; |
| 512 | goto end; |
| 513 | } |
| 514 | strcpy(name, "$app."); |
| 515 | strcat(name, orig_name); |
| 516 | idx = lttng_get_context_index(*pctx, name); |
| 517 | if (idx < 0) { |
| 518 | assert(lttng_context_is_app(name)); |
| 519 | ret = lttng_ust_add_app_context_to_ctx_rcu(name, |
| 520 | pctx); |
| 521 | if (ret) |
| 522 | return ret; |
| 523 | idx = lttng_get_context_index(*pctx, name); |
| 524 | if (idx < 0) |
| 525 | return -ENOENT; |
| 526 | } |
| 527 | ctx_field = &(*pctx)->fields[idx]; |
| 528 | field = ctx_field->event_field; |
| 529 | ret = specialize_load_object(field, load, true); |
| 530 | if (ret) |
| 531 | goto end; |
| 532 | /* Specialize each get_symbol into a get_index. */ |
| 533 | insn->op = BYTECODE_OP_GET_INDEX_U16; |
| 534 | memset(&gid, 0, sizeof(gid)); |
| 535 | gid.ctx_index = idx; |
| 536 | gid.elem.type = load->object_type; |
| 537 | gid.elem.rev_bo = load->rev_bo; |
| 538 | gid.field = field; |
| 539 | data_offset = bytecode_push_data(runtime, &gid, |
| 540 | __alignof__(gid), sizeof(gid)); |
| 541 | if (data_offset < 0) { |
| 542 | ret = -EINVAL; |
| 543 | goto end; |
| 544 | } |
| 545 | ((struct get_index_u16 *) insn->data)->index = data_offset; |
| 546 | ret = 0; |
| 547 | end: |
| 548 | free(name); |
| 549 | return ret; |
| 550 | } |
| 551 | |
| 552 | static int specialize_payload_lookup(const struct lttng_ust_event_desc *event_desc, |
| 553 | struct bytecode_runtime *runtime, |
| 554 | struct load_op *insn, |
| 555 | struct vstack_load *load) |
| 556 | { |
| 557 | const char *name; |
| 558 | uint16_t offset; |
| 559 | unsigned int i, nr_fields; |
| 560 | bool found = false; |
| 561 | uint32_t field_offset = 0; |
| 562 | const struct lttng_ust_event_field *field; |
| 563 | int ret; |
| 564 | struct bytecode_get_index_data gid; |
| 565 | ssize_t data_offset; |
| 566 | |
| 567 | nr_fields = event_desc->tp_class->nr_fields; |
| 568 | offset = ((struct get_symbol *) insn->data)->offset; |
| 569 | name = runtime->p.bc->bc.data + runtime->p.bc->bc.reloc_offset + offset; |
| 570 | for (i = 0; i < nr_fields; i++) { |
| 571 | field = event_desc->tp_class->fields[i]; |
| 572 | if (field->nofilter) { |
| 573 | continue; |
| 574 | } |
| 575 | if (!strcmp(field->name, name)) { |
| 576 | found = true; |
| 577 | break; |
| 578 | } |
| 579 | /* compute field offset on stack */ |
| 580 | switch (field->type->type) { |
| 581 | case lttng_ust_type_integer: |
| 582 | case lttng_ust_type_enum: |
| 583 | field_offset += sizeof(int64_t); |
| 584 | break; |
| 585 | case lttng_ust_type_array: |
| 586 | case lttng_ust_type_sequence: |
| 587 | field_offset += sizeof(unsigned long); |
| 588 | field_offset += sizeof(void *); |
| 589 | break; |
| 590 | case lttng_ust_type_string: |
| 591 | field_offset += sizeof(void *); |
| 592 | break; |
| 593 | case lttng_ust_type_float: |
| 594 | field_offset += sizeof(double); |
| 595 | break; |
| 596 | default: |
| 597 | ret = -EINVAL; |
| 598 | goto end; |
| 599 | } |
| 600 | } |
| 601 | if (!found) { |
| 602 | ret = -EINVAL; |
| 603 | goto end; |
| 604 | } |
| 605 | |
| 606 | ret = specialize_load_object(field, load, false); |
| 607 | if (ret) |
| 608 | goto end; |
| 609 | |
| 610 | /* Specialize each get_symbol into a get_index. */ |
| 611 | insn->op = BYTECODE_OP_GET_INDEX_U16; |
| 612 | memset(&gid, 0, sizeof(gid)); |
| 613 | gid.offset = field_offset; |
| 614 | gid.elem.type = load->object_type; |
| 615 | gid.elem.rev_bo = load->rev_bo; |
| 616 | gid.field = field; |
| 617 | data_offset = bytecode_push_data(runtime, &gid, |
| 618 | __alignof__(gid), sizeof(gid)); |
| 619 | if (data_offset < 0) { |
| 620 | ret = -EINVAL; |
| 621 | goto end; |
| 622 | } |
| 623 | ((struct get_index_u16 *) insn->data)->index = data_offset; |
| 624 | ret = 0; |
| 625 | end: |
| 626 | return ret; |
| 627 | } |
| 628 | |
| 629 | int lttng_bytecode_specialize(const struct lttng_ust_event_desc *event_desc, |
| 630 | struct bytecode_runtime *bytecode) |
| 631 | { |
| 632 | void *pc, *next_pc, *start_pc; |
| 633 | int ret = -EINVAL; |
| 634 | struct vstack _stack; |
| 635 | struct vstack *stack = &_stack; |
| 636 | struct lttng_ust_ctx **pctx = bytecode->p.pctx; |
| 637 | |
| 638 | vstack_init(stack); |
| 639 | |
| 640 | start_pc = &bytecode->code[0]; |
| 641 | for (pc = next_pc = start_pc; pc - start_pc < bytecode->len; |
| 642 | pc = next_pc) { |
| 643 | switch (*(bytecode_opcode_t *) pc) { |
| 644 | case BYTECODE_OP_UNKNOWN: |
| 645 | default: |
| 646 | ERR("unknown bytecode op %u\n", |
| 647 | (unsigned int) *(bytecode_opcode_t *) pc); |
| 648 | ret = -EINVAL; |
| 649 | goto end; |
| 650 | |
| 651 | case BYTECODE_OP_RETURN: |
| 652 | if (vstack_ax(stack)->type == REG_S64 || |
| 653 | vstack_ax(stack)->type == REG_U64) |
| 654 | *(bytecode_opcode_t *) pc = BYTECODE_OP_RETURN_S64; |
| 655 | ret = 0; |
| 656 | goto end; |
| 657 | |
| 658 | case BYTECODE_OP_RETURN_S64: |
| 659 | if (vstack_ax(stack)->type != REG_S64 && |
| 660 | vstack_ax(stack)->type != REG_U64) { |
| 661 | ERR("Unexpected register type\n"); |
| 662 | ret = -EINVAL; |
| 663 | goto end; |
| 664 | } |
| 665 | ret = 0; |
| 666 | goto end; |
| 667 | |
| 668 | /* binary */ |
| 669 | case BYTECODE_OP_MUL: |
| 670 | case BYTECODE_OP_DIV: |
| 671 | case BYTECODE_OP_MOD: |
| 672 | case BYTECODE_OP_PLUS: |
| 673 | case BYTECODE_OP_MINUS: |
| 674 | ERR("unsupported bytecode op %u\n", |
| 675 | (unsigned int) *(bytecode_opcode_t *) pc); |
| 676 | ret = -EINVAL; |
| 677 | goto end; |
| 678 | |
| 679 | case BYTECODE_OP_EQ: |
| 680 | { |
| 681 | struct binary_op *insn = (struct binary_op *) pc; |
| 682 | |
| 683 | switch(vstack_ax(stack)->type) { |
| 684 | default: |
| 685 | ERR("unknown register type\n"); |
| 686 | ret = -EINVAL; |
| 687 | goto end; |
| 688 | |
| 689 | case REG_STRING: |
| 690 | if (vstack_bx(stack)->type == REG_UNKNOWN) |
| 691 | break; |
| 692 | if (vstack_bx(stack)->type == REG_STAR_GLOB_STRING) |
| 693 | insn->op = BYTECODE_OP_EQ_STAR_GLOB_STRING; |
| 694 | else |
| 695 | insn->op = BYTECODE_OP_EQ_STRING; |
| 696 | break; |
| 697 | case REG_STAR_GLOB_STRING: |
| 698 | if (vstack_bx(stack)->type == REG_UNKNOWN) |
| 699 | break; |
| 700 | insn->op = BYTECODE_OP_EQ_STAR_GLOB_STRING; |
| 701 | break; |
| 702 | case REG_S64: |
| 703 | case REG_U64: |
| 704 | if (vstack_bx(stack)->type == REG_UNKNOWN) |
| 705 | break; |
| 706 | if (vstack_bx(stack)->type == REG_S64 || |
| 707 | vstack_bx(stack)->type == REG_U64) |
| 708 | insn->op = BYTECODE_OP_EQ_S64; |
| 709 | else |
| 710 | insn->op = BYTECODE_OP_EQ_DOUBLE_S64; |
| 711 | break; |
| 712 | case REG_DOUBLE: |
| 713 | if (vstack_bx(stack)->type == REG_UNKNOWN) |
| 714 | break; |
| 715 | if (vstack_bx(stack)->type == REG_S64 || |
| 716 | vstack_bx(stack)->type == REG_U64) |
| 717 | insn->op = BYTECODE_OP_EQ_S64_DOUBLE; |
| 718 | else |
| 719 | insn->op = BYTECODE_OP_EQ_DOUBLE; |
| 720 | break; |
| 721 | case REG_UNKNOWN: |
| 722 | break; /* Dynamic typing. */ |
| 723 | } |
| 724 | /* Pop 2, push 1 */ |
| 725 | if (vstack_pop(stack)) { |
| 726 | ret = -EINVAL; |
| 727 | goto end; |
| 728 | } |
| 729 | vstack_ax(stack)->type = REG_S64; |
| 730 | next_pc += sizeof(struct binary_op); |
| 731 | break; |
| 732 | } |
| 733 | |
| 734 | case BYTECODE_OP_NE: |
| 735 | { |
| 736 | struct binary_op *insn = (struct binary_op *) pc; |
| 737 | |
| 738 | switch(vstack_ax(stack)->type) { |
| 739 | default: |
| 740 | ERR("unknown register type\n"); |
| 741 | ret = -EINVAL; |
| 742 | goto end; |
| 743 | |
| 744 | case REG_STRING: |
| 745 | if (vstack_bx(stack)->type == REG_UNKNOWN) |
| 746 | break; |
| 747 | if (vstack_bx(stack)->type == REG_STAR_GLOB_STRING) |
| 748 | insn->op = BYTECODE_OP_NE_STAR_GLOB_STRING; |
| 749 | else |
| 750 | insn->op = BYTECODE_OP_NE_STRING; |
| 751 | break; |
| 752 | case REG_STAR_GLOB_STRING: |
| 753 | if (vstack_bx(stack)->type == REG_UNKNOWN) |
| 754 | break; |
| 755 | insn->op = BYTECODE_OP_NE_STAR_GLOB_STRING; |
| 756 | break; |
| 757 | case REG_S64: |
| 758 | case REG_U64: |
| 759 | if (vstack_bx(stack)->type == REG_UNKNOWN) |
| 760 | break; |
| 761 | if (vstack_bx(stack)->type == REG_S64 || |
| 762 | vstack_bx(stack)->type == REG_U64) |
| 763 | insn->op = BYTECODE_OP_NE_S64; |
| 764 | else |
| 765 | insn->op = BYTECODE_OP_NE_DOUBLE_S64; |
| 766 | break; |
| 767 | case REG_DOUBLE: |
| 768 | if (vstack_bx(stack)->type == REG_UNKNOWN) |
| 769 | break; |
| 770 | if (vstack_bx(stack)->type == REG_S64 || |
| 771 | vstack_bx(stack)->type == REG_U64) |
| 772 | insn->op = BYTECODE_OP_NE_S64_DOUBLE; |
| 773 | else |
| 774 | insn->op = BYTECODE_OP_NE_DOUBLE; |
| 775 | break; |
| 776 | case REG_UNKNOWN: |
| 777 | break; /* Dynamic typing. */ |
| 778 | } |
| 779 | /* Pop 2, push 1 */ |
| 780 | if (vstack_pop(stack)) { |
| 781 | ret = -EINVAL; |
| 782 | goto end; |
| 783 | } |
| 784 | vstack_ax(stack)->type = REG_S64; |
| 785 | next_pc += sizeof(struct binary_op); |
| 786 | break; |
| 787 | } |
| 788 | |
| 789 | case BYTECODE_OP_GT: |
| 790 | { |
| 791 | struct binary_op *insn = (struct binary_op *) pc; |
| 792 | |
| 793 | switch(vstack_ax(stack)->type) { |
| 794 | default: |
| 795 | ERR("unknown register type\n"); |
| 796 | ret = -EINVAL; |
| 797 | goto end; |
| 798 | |
| 799 | case REG_STAR_GLOB_STRING: |
| 800 | ERR("invalid register type for > binary operator\n"); |
| 801 | ret = -EINVAL; |
| 802 | goto end; |
| 803 | case REG_STRING: |
| 804 | if (vstack_bx(stack)->type == REG_UNKNOWN) |
| 805 | break; |
| 806 | insn->op = BYTECODE_OP_GT_STRING; |
| 807 | break; |
| 808 | case REG_S64: |
| 809 | case REG_U64: |
| 810 | if (vstack_bx(stack)->type == REG_UNKNOWN) |
| 811 | break; |
| 812 | if (vstack_bx(stack)->type == REG_S64 || |
| 813 | vstack_bx(stack)->type == REG_U64) |
| 814 | insn->op = BYTECODE_OP_GT_S64; |
| 815 | else |
| 816 | insn->op = BYTECODE_OP_GT_DOUBLE_S64; |
| 817 | break; |
| 818 | case REG_DOUBLE: |
| 819 | if (vstack_bx(stack)->type == REG_UNKNOWN) |
| 820 | break; |
| 821 | if (vstack_bx(stack)->type == REG_S64 || |
| 822 | vstack_bx(stack)->type == REG_U64) |
| 823 | insn->op = BYTECODE_OP_GT_S64_DOUBLE; |
| 824 | else |
| 825 | insn->op = BYTECODE_OP_GT_DOUBLE; |
| 826 | break; |
| 827 | case REG_UNKNOWN: |
| 828 | break; /* Dynamic typing. */ |
| 829 | } |
| 830 | /* Pop 2, push 1 */ |
| 831 | if (vstack_pop(stack)) { |
| 832 | ret = -EINVAL; |
| 833 | goto end; |
| 834 | } |
| 835 | vstack_ax(stack)->type = REG_S64; |
| 836 | next_pc += sizeof(struct binary_op); |
| 837 | break; |
| 838 | } |
| 839 | |
| 840 | case BYTECODE_OP_LT: |
| 841 | { |
| 842 | struct binary_op *insn = (struct binary_op *) pc; |
| 843 | |
| 844 | switch(vstack_ax(stack)->type) { |
| 845 | default: |
| 846 | ERR("unknown register type\n"); |
| 847 | ret = -EINVAL; |
| 848 | goto end; |
| 849 | |
| 850 | case REG_STAR_GLOB_STRING: |
| 851 | ERR("invalid register type for < binary operator\n"); |
| 852 | ret = -EINVAL; |
| 853 | goto end; |
| 854 | case REG_STRING: |
| 855 | if (vstack_bx(stack)->type == REG_UNKNOWN) |
| 856 | break; |
| 857 | insn->op = BYTECODE_OP_LT_STRING; |
| 858 | break; |
| 859 | case REG_S64: |
| 860 | case REG_U64: |
| 861 | if (vstack_bx(stack)->type == REG_UNKNOWN) |
| 862 | break; |
| 863 | if (vstack_bx(stack)->type == REG_S64 || |
| 864 | vstack_bx(stack)->type == REG_U64) |
| 865 | insn->op = BYTECODE_OP_LT_S64; |
| 866 | else |
| 867 | insn->op = BYTECODE_OP_LT_DOUBLE_S64; |
| 868 | break; |
| 869 | case REG_DOUBLE: |
| 870 | if (vstack_bx(stack)->type == REG_UNKNOWN) |
| 871 | break; |
| 872 | if (vstack_bx(stack)->type == REG_S64 || |
| 873 | vstack_bx(stack)->type == REG_U64) |
| 874 | insn->op = BYTECODE_OP_LT_S64_DOUBLE; |
| 875 | else |
| 876 | insn->op = BYTECODE_OP_LT_DOUBLE; |
| 877 | break; |
| 878 | case REG_UNKNOWN: |
| 879 | break; /* Dynamic typing. */ |
| 880 | } |
| 881 | /* Pop 2, push 1 */ |
| 882 | if (vstack_pop(stack)) { |
| 883 | ret = -EINVAL; |
| 884 | goto end; |
| 885 | } |
| 886 | vstack_ax(stack)->type = REG_S64; |
| 887 | next_pc += sizeof(struct binary_op); |
| 888 | break; |
| 889 | } |
| 890 | |
| 891 | case BYTECODE_OP_GE: |
| 892 | { |
| 893 | struct binary_op *insn = (struct binary_op *) pc; |
| 894 | |
| 895 | switch(vstack_ax(stack)->type) { |
| 896 | default: |
| 897 | ERR("unknown register type\n"); |
| 898 | ret = -EINVAL; |
| 899 | goto end; |
| 900 | |
| 901 | case REG_STAR_GLOB_STRING: |
| 902 | ERR("invalid register type for >= binary operator\n"); |
| 903 | ret = -EINVAL; |
| 904 | goto end; |
| 905 | case REG_STRING: |
| 906 | if (vstack_bx(stack)->type == REG_UNKNOWN) |
| 907 | break; |
| 908 | insn->op = BYTECODE_OP_GE_STRING; |
| 909 | break; |
| 910 | case REG_S64: |
| 911 | case REG_U64: |
| 912 | if (vstack_bx(stack)->type == REG_UNKNOWN) |
| 913 | break; |
| 914 | if (vstack_bx(stack)->type == REG_S64 || |
| 915 | vstack_bx(stack)->type == REG_U64) |
| 916 | insn->op = BYTECODE_OP_GE_S64; |
| 917 | else |
| 918 | insn->op = BYTECODE_OP_GE_DOUBLE_S64; |
| 919 | break; |
| 920 | case REG_DOUBLE: |
| 921 | if (vstack_bx(stack)->type == REG_UNKNOWN) |
| 922 | break; |
| 923 | if (vstack_bx(stack)->type == REG_S64 || |
| 924 | vstack_bx(stack)->type == REG_U64) |
| 925 | insn->op = BYTECODE_OP_GE_S64_DOUBLE; |
| 926 | else |
| 927 | insn->op = BYTECODE_OP_GE_DOUBLE; |
| 928 | break; |
| 929 | case REG_UNKNOWN: |
| 930 | break; /* Dynamic typing. */ |
| 931 | } |
| 932 | /* Pop 2, push 1 */ |
| 933 | if (vstack_pop(stack)) { |
| 934 | ret = -EINVAL; |
| 935 | goto end; |
| 936 | } |
| 937 | vstack_ax(stack)->type = REG_U64; |
| 938 | next_pc += sizeof(struct binary_op); |
| 939 | break; |
| 940 | } |
| 941 | case BYTECODE_OP_LE: |
| 942 | { |
| 943 | struct binary_op *insn = (struct binary_op *) pc; |
| 944 | |
| 945 | switch(vstack_ax(stack)->type) { |
| 946 | default: |
| 947 | ERR("unknown register type\n"); |
| 948 | ret = -EINVAL; |
| 949 | goto end; |
| 950 | |
| 951 | case REG_STAR_GLOB_STRING: |
| 952 | ERR("invalid register type for <= binary operator\n"); |
| 953 | ret = -EINVAL; |
| 954 | goto end; |
| 955 | case REG_STRING: |
| 956 | if (vstack_bx(stack)->type == REG_UNKNOWN) |
| 957 | break; |
| 958 | insn->op = BYTECODE_OP_LE_STRING; |
| 959 | break; |
| 960 | case REG_S64: |
| 961 | case REG_U64: |
| 962 | if (vstack_bx(stack)->type == REG_UNKNOWN) |
| 963 | break; |
| 964 | if (vstack_bx(stack)->type == REG_S64 || |
| 965 | vstack_bx(stack)->type == REG_U64) |
| 966 | insn->op = BYTECODE_OP_LE_S64; |
| 967 | else |
| 968 | insn->op = BYTECODE_OP_LE_DOUBLE_S64; |
| 969 | break; |
| 970 | case REG_DOUBLE: |
| 971 | if (vstack_bx(stack)->type == REG_UNKNOWN) |
| 972 | break; |
| 973 | if (vstack_bx(stack)->type == REG_S64 || |
| 974 | vstack_bx(stack)->type == REG_U64) |
| 975 | insn->op = BYTECODE_OP_LE_S64_DOUBLE; |
| 976 | else |
| 977 | insn->op = BYTECODE_OP_LE_DOUBLE; |
| 978 | break; |
| 979 | case REG_UNKNOWN: |
| 980 | break; /* Dynamic typing. */ |
| 981 | } |
| 982 | vstack_ax(stack)->type = REG_S64; |
| 983 | next_pc += sizeof(struct binary_op); |
| 984 | break; |
| 985 | } |
| 986 | |
| 987 | case BYTECODE_OP_EQ_STRING: |
| 988 | case BYTECODE_OP_NE_STRING: |
| 989 | case BYTECODE_OP_GT_STRING: |
| 990 | case BYTECODE_OP_LT_STRING: |
| 991 | case BYTECODE_OP_GE_STRING: |
| 992 | case BYTECODE_OP_LE_STRING: |
| 993 | case BYTECODE_OP_EQ_STAR_GLOB_STRING: |
| 994 | case BYTECODE_OP_NE_STAR_GLOB_STRING: |
| 995 | case BYTECODE_OP_EQ_S64: |
| 996 | case BYTECODE_OP_NE_S64: |
| 997 | case BYTECODE_OP_GT_S64: |
| 998 | case BYTECODE_OP_LT_S64: |
| 999 | case BYTECODE_OP_GE_S64: |
| 1000 | case BYTECODE_OP_LE_S64: |
| 1001 | case BYTECODE_OP_EQ_DOUBLE: |
| 1002 | case BYTECODE_OP_NE_DOUBLE: |
| 1003 | case BYTECODE_OP_GT_DOUBLE: |
| 1004 | case BYTECODE_OP_LT_DOUBLE: |
| 1005 | case BYTECODE_OP_GE_DOUBLE: |
| 1006 | case BYTECODE_OP_LE_DOUBLE: |
| 1007 | case BYTECODE_OP_EQ_DOUBLE_S64: |
| 1008 | case BYTECODE_OP_NE_DOUBLE_S64: |
| 1009 | case BYTECODE_OP_GT_DOUBLE_S64: |
| 1010 | case BYTECODE_OP_LT_DOUBLE_S64: |
| 1011 | case BYTECODE_OP_GE_DOUBLE_S64: |
| 1012 | case BYTECODE_OP_LE_DOUBLE_S64: |
| 1013 | case BYTECODE_OP_EQ_S64_DOUBLE: |
| 1014 | case BYTECODE_OP_NE_S64_DOUBLE: |
| 1015 | case BYTECODE_OP_GT_S64_DOUBLE: |
| 1016 | case BYTECODE_OP_LT_S64_DOUBLE: |
| 1017 | case BYTECODE_OP_GE_S64_DOUBLE: |
| 1018 | case BYTECODE_OP_LE_S64_DOUBLE: |
| 1019 | { |
| 1020 | /* Pop 2, push 1 */ |
| 1021 | if (vstack_pop(stack)) { |
| 1022 | ret = -EINVAL; |
| 1023 | goto end; |
| 1024 | } |
| 1025 | vstack_ax(stack)->type = REG_S64; |
| 1026 | next_pc += sizeof(struct binary_op); |
| 1027 | break; |
| 1028 | } |
| 1029 | |
| 1030 | case BYTECODE_OP_BIT_RSHIFT: |
| 1031 | case BYTECODE_OP_BIT_LSHIFT: |
| 1032 | case BYTECODE_OP_BIT_AND: |
| 1033 | case BYTECODE_OP_BIT_OR: |
| 1034 | case BYTECODE_OP_BIT_XOR: |
| 1035 | { |
| 1036 | /* Pop 2, push 1 */ |
| 1037 | if (vstack_pop(stack)) { |
| 1038 | ret = -EINVAL; |
| 1039 | goto end; |
| 1040 | } |
| 1041 | vstack_ax(stack)->type = REG_S64; |
| 1042 | next_pc += sizeof(struct binary_op); |
| 1043 | break; |
| 1044 | } |
| 1045 | |
| 1046 | /* unary */ |
| 1047 | case BYTECODE_OP_UNARY_PLUS: |
| 1048 | { |
| 1049 | struct unary_op *insn = (struct unary_op *) pc; |
| 1050 | |
| 1051 | switch(vstack_ax(stack)->type) { |
| 1052 | default: |
| 1053 | ERR("unknown register type\n"); |
| 1054 | ret = -EINVAL; |
| 1055 | goto end; |
| 1056 | |
| 1057 | case REG_S64: |
| 1058 | case REG_U64: |
| 1059 | insn->op = BYTECODE_OP_UNARY_PLUS_S64; |
| 1060 | break; |
| 1061 | case REG_DOUBLE: |
| 1062 | insn->op = BYTECODE_OP_UNARY_PLUS_DOUBLE; |
| 1063 | break; |
| 1064 | case REG_UNKNOWN: /* Dynamic typing. */ |
| 1065 | break; |
| 1066 | } |
| 1067 | /* Pop 1, push 1 */ |
| 1068 | next_pc += sizeof(struct unary_op); |
| 1069 | break; |
| 1070 | } |
| 1071 | |
| 1072 | case BYTECODE_OP_UNARY_MINUS: |
| 1073 | { |
| 1074 | struct unary_op *insn = (struct unary_op *) pc; |
| 1075 | |
| 1076 | switch(vstack_ax(stack)->type) { |
| 1077 | default: |
| 1078 | ERR("unknown register type\n"); |
| 1079 | ret = -EINVAL; |
| 1080 | goto end; |
| 1081 | |
| 1082 | case REG_S64: |
| 1083 | case REG_U64: |
| 1084 | insn->op = BYTECODE_OP_UNARY_MINUS_S64; |
| 1085 | break; |
| 1086 | case REG_DOUBLE: |
| 1087 | insn->op = BYTECODE_OP_UNARY_MINUS_DOUBLE; |
| 1088 | break; |
| 1089 | case REG_UNKNOWN: /* Dynamic typing. */ |
| 1090 | break; |
| 1091 | } |
| 1092 | /* Pop 1, push 1 */ |
| 1093 | next_pc += sizeof(struct unary_op); |
| 1094 | break; |
| 1095 | } |
| 1096 | |
| 1097 | case BYTECODE_OP_UNARY_NOT: |
| 1098 | { |
| 1099 | struct unary_op *insn = (struct unary_op *) pc; |
| 1100 | |
| 1101 | switch(vstack_ax(stack)->type) { |
| 1102 | default: |
| 1103 | ERR("unknown register type\n"); |
| 1104 | ret = -EINVAL; |
| 1105 | goto end; |
| 1106 | |
| 1107 | case REG_S64: |
| 1108 | case REG_U64: |
| 1109 | insn->op = BYTECODE_OP_UNARY_NOT_S64; |
| 1110 | break; |
| 1111 | case REG_DOUBLE: |
| 1112 | insn->op = BYTECODE_OP_UNARY_NOT_DOUBLE; |
| 1113 | break; |
| 1114 | case REG_UNKNOWN: /* Dynamic typing. */ |
| 1115 | break; |
| 1116 | } |
| 1117 | /* Pop 1, push 1 */ |
| 1118 | next_pc += sizeof(struct unary_op); |
| 1119 | break; |
| 1120 | } |
| 1121 | |
| 1122 | case BYTECODE_OP_UNARY_BIT_NOT: |
| 1123 | { |
| 1124 | /* Pop 1, push 1 */ |
| 1125 | next_pc += sizeof(struct unary_op); |
| 1126 | break; |
| 1127 | } |
| 1128 | |
| 1129 | case BYTECODE_OP_UNARY_PLUS_S64: |
| 1130 | case BYTECODE_OP_UNARY_MINUS_S64: |
| 1131 | case BYTECODE_OP_UNARY_NOT_S64: |
| 1132 | case BYTECODE_OP_UNARY_PLUS_DOUBLE: |
| 1133 | case BYTECODE_OP_UNARY_MINUS_DOUBLE: |
| 1134 | case BYTECODE_OP_UNARY_NOT_DOUBLE: |
| 1135 | { |
| 1136 | /* Pop 1, push 1 */ |
| 1137 | next_pc += sizeof(struct unary_op); |
| 1138 | break; |
| 1139 | } |
| 1140 | |
| 1141 | /* logical */ |
| 1142 | case BYTECODE_OP_AND: |
| 1143 | case BYTECODE_OP_OR: |
| 1144 | { |
| 1145 | /* Continue to next instruction */ |
| 1146 | /* Pop 1 when jump not taken */ |
| 1147 | if (vstack_pop(stack)) { |
| 1148 | ret = -EINVAL; |
| 1149 | goto end; |
| 1150 | } |
| 1151 | next_pc += sizeof(struct logical_op); |
| 1152 | break; |
| 1153 | } |
| 1154 | |
| 1155 | /* load field ref */ |
| 1156 | case BYTECODE_OP_LOAD_FIELD_REF: |
| 1157 | { |
| 1158 | ERR("Unknown field ref type\n"); |
| 1159 | ret = -EINVAL; |
| 1160 | goto end; |
| 1161 | } |
| 1162 | /* get context ref */ |
| 1163 | case BYTECODE_OP_GET_CONTEXT_REF: |
| 1164 | { |
| 1165 | if (vstack_push(stack)) { |
| 1166 | ret = -EINVAL; |
| 1167 | goto end; |
| 1168 | } |
| 1169 | vstack_ax(stack)->type = REG_UNKNOWN; |
| 1170 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); |
| 1171 | break; |
| 1172 | } |
| 1173 | case BYTECODE_OP_LOAD_FIELD_REF_STRING: |
| 1174 | case BYTECODE_OP_LOAD_FIELD_REF_SEQUENCE: |
| 1175 | case BYTECODE_OP_GET_CONTEXT_REF_STRING: |
| 1176 | { |
| 1177 | if (vstack_push(stack)) { |
| 1178 | ret = -EINVAL; |
| 1179 | goto end; |
| 1180 | } |
| 1181 | vstack_ax(stack)->type = REG_STRING; |
| 1182 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); |
| 1183 | break; |
| 1184 | } |
| 1185 | case BYTECODE_OP_LOAD_FIELD_REF_S64: |
| 1186 | case BYTECODE_OP_GET_CONTEXT_REF_S64: |
| 1187 | { |
| 1188 | if (vstack_push(stack)) { |
| 1189 | ret = -EINVAL; |
| 1190 | goto end; |
| 1191 | } |
| 1192 | vstack_ax(stack)->type = REG_S64; |
| 1193 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); |
| 1194 | break; |
| 1195 | } |
| 1196 | case BYTECODE_OP_LOAD_FIELD_REF_DOUBLE: |
| 1197 | case BYTECODE_OP_GET_CONTEXT_REF_DOUBLE: |
| 1198 | { |
| 1199 | if (vstack_push(stack)) { |
| 1200 | ret = -EINVAL; |
| 1201 | goto end; |
| 1202 | } |
| 1203 | vstack_ax(stack)->type = REG_DOUBLE; |
| 1204 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); |
| 1205 | break; |
| 1206 | } |
| 1207 | |
| 1208 | /* load from immediate operand */ |
| 1209 | case BYTECODE_OP_LOAD_STRING: |
| 1210 | { |
| 1211 | struct load_op *insn = (struct load_op *) pc; |
| 1212 | |
| 1213 | if (vstack_push(stack)) { |
| 1214 | ret = -EINVAL; |
| 1215 | goto end; |
| 1216 | } |
| 1217 | vstack_ax(stack)->type = REG_STRING; |
| 1218 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; |
| 1219 | break; |
| 1220 | } |
| 1221 | |
| 1222 | case BYTECODE_OP_LOAD_STAR_GLOB_STRING: |
| 1223 | { |
| 1224 | struct load_op *insn = (struct load_op *) pc; |
| 1225 | |
| 1226 | if (vstack_push(stack)) { |
| 1227 | ret = -EINVAL; |
| 1228 | goto end; |
| 1229 | } |
| 1230 | vstack_ax(stack)->type = REG_STAR_GLOB_STRING; |
| 1231 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; |
| 1232 | break; |
| 1233 | } |
| 1234 | |
| 1235 | case BYTECODE_OP_LOAD_S64: |
| 1236 | { |
| 1237 | if (vstack_push(stack)) { |
| 1238 | ret = -EINVAL; |
| 1239 | goto end; |
| 1240 | } |
| 1241 | vstack_ax(stack)->type = REG_S64; |
| 1242 | next_pc += sizeof(struct load_op) |
| 1243 | + sizeof(struct literal_numeric); |
| 1244 | break; |
| 1245 | } |
| 1246 | |
| 1247 | case BYTECODE_OP_LOAD_DOUBLE: |
| 1248 | { |
| 1249 | if (vstack_push(stack)) { |
| 1250 | ret = -EINVAL; |
| 1251 | goto end; |
| 1252 | } |
| 1253 | vstack_ax(stack)->type = REG_DOUBLE; |
| 1254 | next_pc += sizeof(struct load_op) |
| 1255 | + sizeof(struct literal_double); |
| 1256 | break; |
| 1257 | } |
| 1258 | |
| 1259 | /* cast */ |
| 1260 | case BYTECODE_OP_CAST_TO_S64: |
| 1261 | { |
| 1262 | struct cast_op *insn = (struct cast_op *) pc; |
| 1263 | |
| 1264 | switch (vstack_ax(stack)->type) { |
| 1265 | default: |
| 1266 | ERR("unknown register type\n"); |
| 1267 | ret = -EINVAL; |
| 1268 | goto end; |
| 1269 | |
| 1270 | case REG_STRING: |
| 1271 | case REG_STAR_GLOB_STRING: |
| 1272 | ERR("Cast op can only be applied to numeric or floating point registers\n"); |
| 1273 | ret = -EINVAL; |
| 1274 | goto end; |
| 1275 | case REG_S64: |
| 1276 | insn->op = BYTECODE_OP_CAST_NOP; |
| 1277 | break; |
| 1278 | case REG_DOUBLE: |
| 1279 | insn->op = BYTECODE_OP_CAST_DOUBLE_TO_S64; |
| 1280 | break; |
| 1281 | case REG_UNKNOWN: |
| 1282 | case REG_U64: |
| 1283 | break; |
| 1284 | } |
| 1285 | /* Pop 1, push 1 */ |
| 1286 | vstack_ax(stack)->type = REG_S64; |
| 1287 | next_pc += sizeof(struct cast_op); |
| 1288 | break; |
| 1289 | } |
| 1290 | case BYTECODE_OP_CAST_DOUBLE_TO_S64: |
| 1291 | { |
| 1292 | /* Pop 1, push 1 */ |
| 1293 | vstack_ax(stack)->type = REG_S64; |
| 1294 | next_pc += sizeof(struct cast_op); |
| 1295 | break; |
| 1296 | } |
| 1297 | case BYTECODE_OP_CAST_NOP: |
| 1298 | { |
| 1299 | next_pc += sizeof(struct cast_op); |
| 1300 | break; |
| 1301 | } |
| 1302 | |
| 1303 | /* |
| 1304 | * Instructions for recursive traversal through composed types. |
| 1305 | */ |
| 1306 | case BYTECODE_OP_GET_CONTEXT_ROOT: |
| 1307 | { |
| 1308 | if (vstack_push(stack)) { |
| 1309 | ret = -EINVAL; |
| 1310 | goto end; |
| 1311 | } |
| 1312 | vstack_ax(stack)->type = REG_PTR; |
| 1313 | vstack_ax(stack)->load.type = LOAD_ROOT_CONTEXT; |
| 1314 | next_pc += sizeof(struct load_op); |
| 1315 | break; |
| 1316 | } |
| 1317 | case BYTECODE_OP_GET_APP_CONTEXT_ROOT: |
| 1318 | { |
| 1319 | if (vstack_push(stack)) { |
| 1320 | ret = -EINVAL; |
| 1321 | goto end; |
| 1322 | } |
| 1323 | vstack_ax(stack)->type = REG_PTR; |
| 1324 | vstack_ax(stack)->load.type = LOAD_ROOT_APP_CONTEXT; |
| 1325 | next_pc += sizeof(struct load_op); |
| 1326 | break; |
| 1327 | } |
| 1328 | case BYTECODE_OP_GET_PAYLOAD_ROOT: |
| 1329 | { |
| 1330 | if (vstack_push(stack)) { |
| 1331 | ret = -EINVAL; |
| 1332 | goto end; |
| 1333 | } |
| 1334 | vstack_ax(stack)->type = REG_PTR; |
| 1335 | vstack_ax(stack)->load.type = LOAD_ROOT_PAYLOAD; |
| 1336 | next_pc += sizeof(struct load_op); |
| 1337 | break; |
| 1338 | } |
| 1339 | |
| 1340 | case BYTECODE_OP_LOAD_FIELD: |
| 1341 | { |
| 1342 | struct load_op *insn = (struct load_op *) pc; |
| 1343 | |
| 1344 | assert(vstack_ax(stack)->type == REG_PTR); |
| 1345 | /* Pop 1, push 1 */ |
| 1346 | ret = specialize_load_field(vstack_ax(stack), insn); |
| 1347 | if (ret) |
| 1348 | goto end; |
| 1349 | |
| 1350 | next_pc += sizeof(struct load_op); |
| 1351 | break; |
| 1352 | } |
| 1353 | |
| 1354 | case BYTECODE_OP_LOAD_FIELD_S8: |
| 1355 | case BYTECODE_OP_LOAD_FIELD_S16: |
| 1356 | case BYTECODE_OP_LOAD_FIELD_S32: |
| 1357 | case BYTECODE_OP_LOAD_FIELD_S64: |
| 1358 | { |
| 1359 | /* Pop 1, push 1 */ |
| 1360 | vstack_ax(stack)->type = REG_S64; |
| 1361 | next_pc += sizeof(struct load_op); |
| 1362 | break; |
| 1363 | } |
| 1364 | |
| 1365 | case BYTECODE_OP_LOAD_FIELD_U8: |
| 1366 | case BYTECODE_OP_LOAD_FIELD_U16: |
| 1367 | case BYTECODE_OP_LOAD_FIELD_U32: |
| 1368 | case BYTECODE_OP_LOAD_FIELD_U64: |
| 1369 | { |
| 1370 | /* Pop 1, push 1 */ |
| 1371 | vstack_ax(stack)->type = REG_U64; |
| 1372 | next_pc += sizeof(struct load_op); |
| 1373 | break; |
| 1374 | } |
| 1375 | |
| 1376 | case BYTECODE_OP_LOAD_FIELD_STRING: |
| 1377 | case BYTECODE_OP_LOAD_FIELD_SEQUENCE: |
| 1378 | { |
| 1379 | /* Pop 1, push 1 */ |
| 1380 | vstack_ax(stack)->type = REG_STRING; |
| 1381 | next_pc += sizeof(struct load_op); |
| 1382 | break; |
| 1383 | } |
| 1384 | |
| 1385 | case BYTECODE_OP_LOAD_FIELD_DOUBLE: |
| 1386 | { |
| 1387 | /* Pop 1, push 1 */ |
| 1388 | vstack_ax(stack)->type = REG_DOUBLE; |
| 1389 | next_pc += sizeof(struct load_op); |
| 1390 | break; |
| 1391 | } |
| 1392 | |
| 1393 | case BYTECODE_OP_GET_SYMBOL: |
| 1394 | { |
| 1395 | struct load_op *insn = (struct load_op *) pc; |
| 1396 | |
| 1397 | dbg_printf("op get symbol\n"); |
| 1398 | switch (vstack_ax(stack)->load.type) { |
| 1399 | case LOAD_OBJECT: |
| 1400 | ERR("Nested fields not implemented yet."); |
| 1401 | ret = -EINVAL; |
| 1402 | goto end; |
| 1403 | case LOAD_ROOT_CONTEXT: |
| 1404 | /* Lookup context field. */ |
| 1405 | ret = specialize_context_lookup(*pctx, |
| 1406 | bytecode, insn, |
| 1407 | &vstack_ax(stack)->load); |
| 1408 | if (ret) |
| 1409 | goto end; |
| 1410 | break; |
| 1411 | case LOAD_ROOT_APP_CONTEXT: |
| 1412 | /* Lookup app context field. */ |
| 1413 | ret = specialize_app_context_lookup(pctx, |
| 1414 | bytecode, insn, |
| 1415 | &vstack_ax(stack)->load); |
| 1416 | if (ret) |
| 1417 | goto end; |
| 1418 | break; |
| 1419 | case LOAD_ROOT_PAYLOAD: |
| 1420 | /* Lookup event payload field. */ |
| 1421 | ret = specialize_payload_lookup(event_desc, |
| 1422 | bytecode, insn, |
| 1423 | &vstack_ax(stack)->load); |
| 1424 | if (ret) |
| 1425 | goto end; |
| 1426 | break; |
| 1427 | } |
| 1428 | next_pc += sizeof(struct load_op) + sizeof(struct get_symbol); |
| 1429 | break; |
| 1430 | } |
| 1431 | |
| 1432 | case BYTECODE_OP_GET_SYMBOL_FIELD: |
| 1433 | { |
| 1434 | /* Always generated by specialize phase. */ |
| 1435 | ret = -EINVAL; |
| 1436 | goto end; |
| 1437 | } |
| 1438 | |
| 1439 | case BYTECODE_OP_GET_INDEX_U16: |
| 1440 | { |
| 1441 | struct load_op *insn = (struct load_op *) pc; |
| 1442 | struct get_index_u16 *index = (struct get_index_u16 *) insn->data; |
| 1443 | |
| 1444 | dbg_printf("op get index u16\n"); |
| 1445 | /* Pop 1, push 1 */ |
| 1446 | ret = specialize_get_index(bytecode, insn, index->index, |
| 1447 | vstack_ax(stack), sizeof(*index)); |
| 1448 | if (ret) |
| 1449 | goto end; |
| 1450 | next_pc += sizeof(struct load_op) + sizeof(struct get_index_u16); |
| 1451 | break; |
| 1452 | } |
| 1453 | |
| 1454 | case BYTECODE_OP_GET_INDEX_U64: |
| 1455 | { |
| 1456 | struct load_op *insn = (struct load_op *) pc; |
| 1457 | struct get_index_u64 *index = (struct get_index_u64 *) insn->data; |
| 1458 | |
| 1459 | dbg_printf("op get index u64\n"); |
| 1460 | /* Pop 1, push 1 */ |
| 1461 | ret = specialize_get_index(bytecode, insn, index->index, |
| 1462 | vstack_ax(stack), sizeof(*index)); |
| 1463 | if (ret) |
| 1464 | goto end; |
| 1465 | next_pc += sizeof(struct load_op) + sizeof(struct get_index_u64); |
| 1466 | break; |
| 1467 | } |
| 1468 | |
| 1469 | } |
| 1470 | } |
| 1471 | end: |
| 1472 | return ret; |
| 1473 | } |