X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=liblttng-ust%2Flttng-filter-interpreter.c;h=59bc72cdf442027e8e78ba535c91a9e13bd7502f;hb=HEAD;hp=1f43decee2e32414cb71b3f06e2cd2e9d3afbbaf;hpb=77aa5901fd3f09001fb7e78f3533cf58c6d345e5;p=lttng-ust.git diff --git a/liblttng-ust/lttng-filter-interpreter.c b/liblttng-ust/lttng-filter-interpreter.c deleted file mode 100644 index 1f43dece..00000000 --- a/liblttng-ust/lttng-filter-interpreter.c +++ /dev/null @@ -1,930 +0,0 @@ -/* - * lttng-filter-interpreter.c - * - * LTTng UST filter interpreter. - * - * Copyright (C) 2010-2012 Mathieu Desnoyers - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; only - * version 2.1 of the License. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include "lttng-filter.h" - -/* - * -1: wildcard found. - * -2: unknown escape char. - * 0: normal char. - */ - -static -int parse_char(const char **p) -{ - switch (**p) { - case '\\': - (*p)++; - switch (**p) { - case '\\': - case '*': - return 0; - default: - return -2; - } - case '*': - return -1; - default: - return 0; - } -} - -static -int stack_strcmp(struct estack *stack, int top, const char *cmp_type) -{ - const char *p = estack_bx(stack, top)->u.s.str, *q = estack_ax(stack, top)->u.s.str; - int ret; - int diff; - - for (;;) { - int escaped_r0 = 0; - - if (unlikely(p - estack_bx(stack, top)->u.s.str > estack_bx(stack, top)->u.s.seq_len || *p == '\0')) { - if (q - estack_ax(stack, top)->u.s.str > estack_ax(stack, top)->u.s.seq_len || *q == '\0') { - return 0; - } else { - if (estack_ax(stack, top)->u.s.literal) { - ret = parse_char(&q); - if (ret == -1) - return 0; - } - return -1; - } - } - if (unlikely(q - estack_ax(stack, top)->u.s.str > estack_ax(stack, top)->u.s.seq_len || *q == '\0')) { - if (p - estack_bx(stack, top)->u.s.str > estack_bx(stack, top)->u.s.seq_len || *p == '\0') { - return 0; - } else { - if (estack_bx(stack, top)->u.s.literal) { - ret = parse_char(&p); - if (ret == -1) - return 0; - } - return 1; - } - } - if (estack_bx(stack, top)->u.s.literal) { - ret = parse_char(&p); - if (ret == -1) { - return 0; - } else if (ret == -2) { - escaped_r0 = 1; - } - /* else compare both char */ - } - if (estack_ax(stack, top)->u.s.literal) { - ret = parse_char(&q); - if (ret == -1) { - return 0; - } else if (ret == -2) { - if (!escaped_r0) - return -1; - } else { - if (escaped_r0) - return 1; - } - } else { - if (escaped_r0) - return 1; - } - diff = *p - *q; - if (diff != 0) - break; - p++; - q++; - } - return diff; -} - -uint64_t lttng_filter_false(void *filter_data, - const char *filter_stack_data) -{ - return 0; -} - -#ifdef INTERPRETER_USE_SWITCH - -/* - * Fallback for compilers that do not support taking address of labels. - */ - -#define START_OP \ - start_pc = &bytecode->data[0]; \ - for (pc = next_pc = start_pc; pc - start_pc < bytecode->len; \ - pc = next_pc) { \ - dbg_printf("Executing op %s (%u)\n", \ - print_op((unsigned int) *(filter_opcode_t *) pc), \ - (unsigned int) *(filter_opcode_t *) pc); \ - switch (*(filter_opcode_t *) pc) { - -#define OP(name) case name - -#define PO break - -#define END_OP } \ - } - -#else - -/* - * Dispatch-table based interpreter. - */ - -#define START_OP \ - start_pc = &bytecode->data[0]; \ - pc = next_pc = start_pc; \ - if (unlikely(pc - start_pc >= bytecode->len)) \ - goto end; \ - goto *dispatch[*(filter_opcode_t *) pc]; - -#define OP(name) \ -LABEL_##name - -#define PO \ - pc = next_pc; \ - goto *dispatch[*(filter_opcode_t *) pc]; - -#define END_OP - -#endif - -/* - * Return 0 (discard), or raise the 0x1 flag (log event). - * Currently, other flags are kept for future extensions and have no - * effect. - */ -uint64_t lttng_filter_interpret_bytecode(void *filter_data, - const char *filter_stack_data) -{ - struct bytecode_runtime *bytecode = filter_data; - struct lttng_ctx *ctx = bytecode->p.bc->enabler->chan->ctx; - void *pc, *next_pc, *start_pc; - int ret = -EINVAL; - uint64_t retval = 0; - struct estack _stack; - struct estack *stack = &_stack; - register int64_t ax = 0, bx = 0; - register int top = FILTER_STACK_EMPTY; -#ifndef INTERPRETER_USE_SWITCH - static void *dispatch[NR_FILTER_OPS] = { - [ FILTER_OP_UNKNOWN ] = &&LABEL_FILTER_OP_UNKNOWN, - - [ FILTER_OP_RETURN ] = &&LABEL_FILTER_OP_RETURN, - - /* binary */ - [ FILTER_OP_MUL ] = &&LABEL_FILTER_OP_MUL, - [ FILTER_OP_DIV ] = &&LABEL_FILTER_OP_DIV, - [ FILTER_OP_MOD ] = &&LABEL_FILTER_OP_MOD, - [ FILTER_OP_PLUS ] = &&LABEL_FILTER_OP_PLUS, - [ FILTER_OP_MINUS ] = &&LABEL_FILTER_OP_MINUS, - [ FILTER_OP_RSHIFT ] = &&LABEL_FILTER_OP_RSHIFT, - [ FILTER_OP_LSHIFT ] = &&LABEL_FILTER_OP_LSHIFT, - [ FILTER_OP_BIN_AND ] = &&LABEL_FILTER_OP_BIN_AND, - [ FILTER_OP_BIN_OR ] = &&LABEL_FILTER_OP_BIN_OR, - [ FILTER_OP_BIN_XOR ] = &&LABEL_FILTER_OP_BIN_XOR, - - /* binary comparators */ - [ FILTER_OP_EQ ] = &&LABEL_FILTER_OP_EQ, - [ FILTER_OP_NE ] = &&LABEL_FILTER_OP_NE, - [ FILTER_OP_GT ] = &&LABEL_FILTER_OP_GT, - [ FILTER_OP_LT ] = &&LABEL_FILTER_OP_LT, - [ FILTER_OP_GE ] = &&LABEL_FILTER_OP_GE, - [ FILTER_OP_LE ] = &&LABEL_FILTER_OP_LE, - - /* string binary comparator */ - [ FILTER_OP_EQ_STRING ] = &&LABEL_FILTER_OP_EQ_STRING, - [ FILTER_OP_NE_STRING ] = &&LABEL_FILTER_OP_NE_STRING, - [ FILTER_OP_GT_STRING ] = &&LABEL_FILTER_OP_GT_STRING, - [ FILTER_OP_LT_STRING ] = &&LABEL_FILTER_OP_LT_STRING, - [ FILTER_OP_GE_STRING ] = &&LABEL_FILTER_OP_GE_STRING, - [ FILTER_OP_LE_STRING ] = &&LABEL_FILTER_OP_LE_STRING, - - /* s64 binary comparator */ - [ FILTER_OP_EQ_S64 ] = &&LABEL_FILTER_OP_EQ_S64, - [ FILTER_OP_NE_S64 ] = &&LABEL_FILTER_OP_NE_S64, - [ FILTER_OP_GT_S64 ] = &&LABEL_FILTER_OP_GT_S64, - [ FILTER_OP_LT_S64 ] = &&LABEL_FILTER_OP_LT_S64, - [ FILTER_OP_GE_S64 ] = &&LABEL_FILTER_OP_GE_S64, - [ FILTER_OP_LE_S64 ] = &&LABEL_FILTER_OP_LE_S64, - - /* double binary comparator */ - [ FILTER_OP_EQ_DOUBLE ] = &&LABEL_FILTER_OP_EQ_DOUBLE, - [ FILTER_OP_NE_DOUBLE ] = &&LABEL_FILTER_OP_NE_DOUBLE, - [ FILTER_OP_GT_DOUBLE ] = &&LABEL_FILTER_OP_GT_DOUBLE, - [ FILTER_OP_LT_DOUBLE ] = &&LABEL_FILTER_OP_LT_DOUBLE, - [ FILTER_OP_GE_DOUBLE ] = &&LABEL_FILTER_OP_GE_DOUBLE, - [ FILTER_OP_LE_DOUBLE ] = &&LABEL_FILTER_OP_LE_DOUBLE, - - /* Mixed S64-double binary comparators */ - [ FILTER_OP_EQ_DOUBLE_S64 ] = &&LABEL_FILTER_OP_EQ_DOUBLE_S64, - [ FILTER_OP_NE_DOUBLE_S64 ] = &&LABEL_FILTER_OP_NE_DOUBLE_S64, - [ FILTER_OP_GT_DOUBLE_S64 ] = &&LABEL_FILTER_OP_GT_DOUBLE_S64, - [ FILTER_OP_LT_DOUBLE_S64 ] = &&LABEL_FILTER_OP_LT_DOUBLE_S64, - [ FILTER_OP_GE_DOUBLE_S64 ] = &&LABEL_FILTER_OP_GE_DOUBLE_S64, - [ FILTER_OP_LE_DOUBLE_S64 ] = &&LABEL_FILTER_OP_LE_DOUBLE_S64, - - [ FILTER_OP_EQ_S64_DOUBLE ] = &&LABEL_FILTER_OP_EQ_S64_DOUBLE, - [ FILTER_OP_NE_S64_DOUBLE ] = &&LABEL_FILTER_OP_NE_S64_DOUBLE, - [ FILTER_OP_GT_S64_DOUBLE ] = &&LABEL_FILTER_OP_GT_S64_DOUBLE, - [ FILTER_OP_LT_S64_DOUBLE ] = &&LABEL_FILTER_OP_LT_S64_DOUBLE, - [ FILTER_OP_GE_S64_DOUBLE ] = &&LABEL_FILTER_OP_GE_S64_DOUBLE, - [ FILTER_OP_LE_S64_DOUBLE ] = &&LABEL_FILTER_OP_LE_S64_DOUBLE, - - /* unary */ - [ FILTER_OP_UNARY_PLUS ] = &&LABEL_FILTER_OP_UNARY_PLUS, - [ FILTER_OP_UNARY_MINUS ] = &&LABEL_FILTER_OP_UNARY_MINUS, - [ FILTER_OP_UNARY_NOT ] = &&LABEL_FILTER_OP_UNARY_NOT, - [ FILTER_OP_UNARY_PLUS_S64 ] = &&LABEL_FILTER_OP_UNARY_PLUS_S64, - [ FILTER_OP_UNARY_MINUS_S64 ] = &&LABEL_FILTER_OP_UNARY_MINUS_S64, - [ FILTER_OP_UNARY_NOT_S64 ] = &&LABEL_FILTER_OP_UNARY_NOT_S64, - [ FILTER_OP_UNARY_PLUS_DOUBLE ] = &&LABEL_FILTER_OP_UNARY_PLUS_DOUBLE, - [ FILTER_OP_UNARY_MINUS_DOUBLE ] = &&LABEL_FILTER_OP_UNARY_MINUS_DOUBLE, - [ FILTER_OP_UNARY_NOT_DOUBLE ] = &&LABEL_FILTER_OP_UNARY_NOT_DOUBLE, - - /* logical */ - [ FILTER_OP_AND ] = &&LABEL_FILTER_OP_AND, - [ FILTER_OP_OR ] = &&LABEL_FILTER_OP_OR, - - /* load field ref */ - [ FILTER_OP_LOAD_FIELD_REF ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF, - [ FILTER_OP_LOAD_FIELD_REF_STRING ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_STRING, - [ FILTER_OP_LOAD_FIELD_REF_SEQUENCE ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_SEQUENCE, - [ FILTER_OP_LOAD_FIELD_REF_S64 ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_S64, - [ FILTER_OP_LOAD_FIELD_REF_DOUBLE ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_DOUBLE, - - /* load from immediate operand */ - [ FILTER_OP_LOAD_STRING ] = &&LABEL_FILTER_OP_LOAD_STRING, - [ FILTER_OP_LOAD_S64 ] = &&LABEL_FILTER_OP_LOAD_S64, - [ FILTER_OP_LOAD_DOUBLE ] = &&LABEL_FILTER_OP_LOAD_DOUBLE, - - /* cast */ - [ FILTER_OP_CAST_TO_S64 ] = &&LABEL_FILTER_OP_CAST_TO_S64, - [ FILTER_OP_CAST_DOUBLE_TO_S64 ] = &&LABEL_FILTER_OP_CAST_DOUBLE_TO_S64, - [ FILTER_OP_CAST_NOP ] = &&LABEL_FILTER_OP_CAST_NOP, - - /* get context ref */ - [ FILTER_OP_GET_CONTEXT_REF ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF, - [ FILTER_OP_GET_CONTEXT_REF_STRING ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF_STRING, - [ FILTER_OP_GET_CONTEXT_REF_S64 ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF_S64, - [ FILTER_OP_GET_CONTEXT_REF_DOUBLE ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF_DOUBLE, - }; -#endif /* #ifndef INTERPRETER_USE_SWITCH */ - - START_OP - - OP(FILTER_OP_UNKNOWN): - OP(FILTER_OP_LOAD_FIELD_REF): - OP(FILTER_OP_GET_CONTEXT_REF): -#ifdef INTERPRETER_USE_SWITCH - default: -#endif /* INTERPRETER_USE_SWITCH */ - ERR("unknown bytecode op %u\n", - (unsigned int) *(filter_opcode_t *) pc); - ret = -EINVAL; - goto end; - - OP(FILTER_OP_RETURN): - /* LTTNG_FILTER_DISCARD or LTTNG_FILTER_RECORD_FLAG */ - retval = !!estack_ax_v; - ret = 0; - goto end; - - /* binary */ - OP(FILTER_OP_MUL): - OP(FILTER_OP_DIV): - OP(FILTER_OP_MOD): - OP(FILTER_OP_PLUS): - OP(FILTER_OP_MINUS): - OP(FILTER_OP_RSHIFT): - OP(FILTER_OP_LSHIFT): - OP(FILTER_OP_BIN_AND): - OP(FILTER_OP_BIN_OR): - OP(FILTER_OP_BIN_XOR): - ERR("unsupported bytecode op %u\n", - (unsigned int) *(filter_opcode_t *) pc); - ret = -EINVAL; - goto end; - - OP(FILTER_OP_EQ): - OP(FILTER_OP_NE): - OP(FILTER_OP_GT): - OP(FILTER_OP_LT): - OP(FILTER_OP_GE): - OP(FILTER_OP_LE): - ERR("unsupported non-specialized bytecode op %u\n", - (unsigned int) *(filter_opcode_t *) pc); - ret = -EINVAL; - goto end; - - OP(FILTER_OP_EQ_STRING): - { - int res; - - res = (stack_strcmp(stack, top, "==") == 0); - estack_pop(stack, top, ax, bx); - estack_ax_v = res; - next_pc += sizeof(struct binary_op); - PO; - } - OP(FILTER_OP_NE_STRING): - { - int res; - - res = (stack_strcmp(stack, top, "!=") != 0); - estack_pop(stack, top, ax, bx); - estack_ax_v = res; - next_pc += sizeof(struct binary_op); - PO; - } - OP(FILTER_OP_GT_STRING): - { - int res; - - res = (stack_strcmp(stack, top, ">") > 0); - estack_pop(stack, top, ax, bx); - estack_ax_v = res; - next_pc += sizeof(struct binary_op); - PO; - } - OP(FILTER_OP_LT_STRING): - { - int res; - - res = (stack_strcmp(stack, top, "<") < 0); - estack_pop(stack, top, ax, bx); - estack_ax_v = res; - next_pc += sizeof(struct binary_op); - PO; - } - OP(FILTER_OP_GE_STRING): - { - int res; - - res = (stack_strcmp(stack, top, ">=") >= 0); - estack_pop(stack, top, ax, bx); - estack_ax_v = res; - next_pc += sizeof(struct binary_op); - PO; - } - OP(FILTER_OP_LE_STRING): - { - int res; - - res = (stack_strcmp(stack, top, "<=") <= 0); - estack_pop(stack, top, ax, bx); - estack_ax_v = res; - next_pc += sizeof(struct binary_op); - PO; - } - - OP(FILTER_OP_EQ_S64): - { - int res; - - res = (estack_bx_v == estack_ax_v); - estack_pop(stack, top, ax, bx); - estack_ax_v = res; - next_pc += sizeof(struct binary_op); - PO; - } - OP(FILTER_OP_NE_S64): - { - int res; - - res = (estack_bx_v != estack_ax_v); - estack_pop(stack, top, ax, bx); - estack_ax_v = res; - next_pc += sizeof(struct binary_op); - PO; - } - OP(FILTER_OP_GT_S64): - { - int res; - - res = (estack_bx_v > estack_ax_v); - estack_pop(stack, top, ax, bx); - estack_ax_v = res; - next_pc += sizeof(struct binary_op); - PO; - } - OP(FILTER_OP_LT_S64): - { - int res; - - res = (estack_bx_v < estack_ax_v); - estack_pop(stack, top, ax, bx); - estack_ax_v = res; - next_pc += sizeof(struct binary_op); - PO; - } - OP(FILTER_OP_GE_S64): - { - int res; - - res = (estack_bx_v >= estack_ax_v); - estack_pop(stack, top, ax, bx); - estack_ax_v = res; - next_pc += sizeof(struct binary_op); - PO; - } - OP(FILTER_OP_LE_S64): - { - int res; - - res = (estack_bx_v <= estack_ax_v); - estack_pop(stack, top, ax, bx); - estack_ax_v = res; - next_pc += sizeof(struct binary_op); - PO; - } - - OP(FILTER_OP_EQ_DOUBLE): - { - int res; - - res = (estack_bx(stack, top)->u.d == estack_ax(stack, top)->u.d); - estack_pop(stack, top, ax, bx); - estack_ax_v = res; - next_pc += sizeof(struct binary_op); - PO; - } - OP(FILTER_OP_NE_DOUBLE): - { - int res; - - res = (estack_bx(stack, top)->u.d != estack_ax(stack, top)->u.d); - estack_pop(stack, top, ax, bx); - estack_ax_v = res; - next_pc += sizeof(struct binary_op); - PO; - } - OP(FILTER_OP_GT_DOUBLE): - { - int res; - - res = (estack_bx(stack, top)->u.d > estack_ax(stack, top)->u.d); - estack_pop(stack, top, ax, bx); - estack_ax_v = res; - next_pc += sizeof(struct binary_op); - PO; - } - OP(FILTER_OP_LT_DOUBLE): - { - int res; - - res = (estack_bx(stack, top)->u.d < estack_ax(stack, top)->u.d); - estack_pop(stack, top, ax, bx); - estack_ax_v = res; - next_pc += sizeof(struct binary_op); - PO; - } - OP(FILTER_OP_GE_DOUBLE): - { - int res; - - res = (estack_bx(stack, top)->u.d >= estack_ax(stack, top)->u.d); - estack_pop(stack, top, ax, bx); - estack_ax_v = res; - next_pc += sizeof(struct binary_op); - PO; - } - OP(FILTER_OP_LE_DOUBLE): - { - int res; - - res = (estack_bx(stack, top)->u.d <= estack_ax(stack, top)->u.d); - estack_pop(stack, top, ax, bx); - estack_ax_v = res; - next_pc += sizeof(struct binary_op); - PO; - } - - /* Mixed S64-double binary comparators */ - OP(FILTER_OP_EQ_DOUBLE_S64): - { - int res; - - res = (estack_bx(stack, top)->u.d == estack_ax_v); - estack_pop(stack, top, ax, bx); - estack_ax_v = res; - next_pc += sizeof(struct binary_op); - PO; - } - OP(FILTER_OP_NE_DOUBLE_S64): - { - int res; - - res = (estack_bx(stack, top)->u.d != estack_ax_v); - estack_pop(stack, top, ax, bx); - estack_ax_v = res; - next_pc += sizeof(struct binary_op); - PO; - } - OP(FILTER_OP_GT_DOUBLE_S64): - { - int res; - - res = (estack_bx(stack, top)->u.d > estack_ax_v); - estack_pop(stack, top, ax, bx); - estack_ax_v = res; - next_pc += sizeof(struct binary_op); - PO; - } - OP(FILTER_OP_LT_DOUBLE_S64): - { - int res; - - res = (estack_bx(stack, top)->u.d < estack_ax_v); - estack_pop(stack, top, ax, bx); - estack_ax_v = res; - next_pc += sizeof(struct binary_op); - PO; - } - OP(FILTER_OP_GE_DOUBLE_S64): - { - int res; - - res = (estack_bx(stack, top)->u.d >= estack_ax_v); - estack_pop(stack, top, ax, bx); - estack_ax_v = res; - next_pc += sizeof(struct binary_op); - PO; - } - OP(FILTER_OP_LE_DOUBLE_S64): - { - int res; - - res = (estack_bx(stack, top)->u.d <= estack_ax_v); - estack_pop(stack, top, ax, bx); - estack_ax_v = res; - next_pc += sizeof(struct binary_op); - PO; - } - - OP(FILTER_OP_EQ_S64_DOUBLE): - { - int res; - - res = (estack_bx_v == estack_ax(stack, top)->u.d); - estack_pop(stack, top, ax, bx); - estack_ax_v = res; - next_pc += sizeof(struct binary_op); - PO; - } - OP(FILTER_OP_NE_S64_DOUBLE): - { - int res; - - res = (estack_bx_v != estack_ax(stack, top)->u.d); - estack_pop(stack, top, ax, bx); - estack_ax_v = res; - next_pc += sizeof(struct binary_op); - PO; - } - OP(FILTER_OP_GT_S64_DOUBLE): - { - int res; - - res = (estack_bx_v > estack_ax(stack, top)->u.d); - estack_pop(stack, top, ax, bx); - estack_ax_v = res; - next_pc += sizeof(struct binary_op); - PO; - } - OP(FILTER_OP_LT_S64_DOUBLE): - { - int res; - - res = (estack_bx_v < estack_ax(stack, top)->u.d); - estack_pop(stack, top, ax, bx); - estack_ax_v = res; - next_pc += sizeof(struct binary_op); - PO; - } - OP(FILTER_OP_GE_S64_DOUBLE): - { - int res; - - res = (estack_bx_v >= estack_ax(stack, top)->u.d); - estack_pop(stack, top, ax, bx); - estack_ax_v = res; - next_pc += sizeof(struct binary_op); - PO; - } - OP(FILTER_OP_LE_S64_DOUBLE): - { - int res; - - res = (estack_bx_v <= estack_ax(stack, top)->u.d); - estack_pop(stack, top, ax, bx); - estack_ax_v = res; - next_pc += sizeof(struct binary_op); - PO; - } - - /* unary */ - OP(FILTER_OP_UNARY_PLUS): - OP(FILTER_OP_UNARY_MINUS): - OP(FILTER_OP_UNARY_NOT): - ERR("unsupported non-specialized bytecode op %u\n", - (unsigned int) *(filter_opcode_t *) pc); - ret = -EINVAL; - goto end; - - - OP(FILTER_OP_UNARY_PLUS_S64): - OP(FILTER_OP_UNARY_PLUS_DOUBLE): - { - next_pc += sizeof(struct unary_op); - PO; - } - OP(FILTER_OP_UNARY_MINUS_S64): - { - estack_ax_v = -estack_ax_v; - next_pc += sizeof(struct unary_op); - PO; - } - OP(FILTER_OP_UNARY_MINUS_DOUBLE): - { - estack_ax(stack, top)->u.d = -estack_ax(stack, top)->u.d; - next_pc += sizeof(struct unary_op); - PO; - } - OP(FILTER_OP_UNARY_NOT_S64): - { - estack_ax_v = !estack_ax_v; - next_pc += sizeof(struct unary_op); - PO; - } - OP(FILTER_OP_UNARY_NOT_DOUBLE): - { - estack_ax(stack, top)->u.d = !estack_ax(stack, top)->u.d; - next_pc += sizeof(struct unary_op); - PO; - } - - /* logical */ - OP(FILTER_OP_AND): - { - struct logical_op *insn = (struct logical_op *) pc; - - /* If AX is 0, skip and evaluate to 0 */ - if (unlikely(estack_ax_v == 0)) { - dbg_printf("Jumping to bytecode offset %u\n", - (unsigned int) insn->skip_offset); - next_pc = start_pc + insn->skip_offset; - } else { - /* Pop 1 when jump not taken */ - estack_pop(stack, top, ax, bx); - next_pc += sizeof(struct logical_op); - } - PO; - } - OP(FILTER_OP_OR): - { - struct logical_op *insn = (struct logical_op *) pc; - - /* If AX is nonzero, skip and evaluate to 1 */ - - if (unlikely(estack_ax_v != 0)) { - estack_ax_v = 1; - dbg_printf("Jumping to bytecode offset %u\n", - (unsigned int) insn->skip_offset); - next_pc = start_pc + insn->skip_offset; - } else { - /* Pop 1 when jump not taken */ - estack_pop(stack, top, ax, bx); - next_pc += sizeof(struct logical_op); - } - PO; - } - - - /* load field ref */ - OP(FILTER_OP_LOAD_FIELD_REF_STRING): - { - struct load_op *insn = (struct load_op *) pc; - struct field_ref *ref = (struct field_ref *) insn->data; - - dbg_printf("load field ref offset %u type string\n", - ref->offset); - estack_push(stack, top, ax, bx); - estack_ax(stack, top)->u.s.str = - *(const char * const *) &filter_stack_data[ref->offset]; - if (unlikely(!estack_ax(stack, top)->u.s.str)) { - dbg_printf("Filter warning: loading a NULL string.\n"); - ret = -EINVAL; - goto end; - } - estack_ax(stack, top)->u.s.seq_len = UINT_MAX; - estack_ax(stack, top)->u.s.literal = 0; - dbg_printf("ref load string %s\n", estack_ax(stack, top)->u.s.str); - next_pc += sizeof(struct load_op) + sizeof(struct field_ref); - PO; - } - - OP(FILTER_OP_LOAD_FIELD_REF_SEQUENCE): - { - struct load_op *insn = (struct load_op *) pc; - struct field_ref *ref = (struct field_ref *) insn->data; - - dbg_printf("load field ref offset %u type sequence\n", - ref->offset); - estack_push(stack, top, ax, bx); - estack_ax(stack, top)->u.s.seq_len = - *(unsigned long *) &filter_stack_data[ref->offset]; - estack_ax(stack, top)->u.s.str = - *(const char **) (&filter_stack_data[ref->offset - + sizeof(unsigned long)]); - if (unlikely(!estack_ax(stack, top)->u.s.str)) { - dbg_printf("Filter warning: loading a NULL sequence.\n"); - ret = -EINVAL; - goto end; - } - estack_ax(stack, top)->u.s.literal = 0; - next_pc += sizeof(struct load_op) + sizeof(struct field_ref); - PO; - } - - OP(FILTER_OP_LOAD_FIELD_REF_S64): - { - struct load_op *insn = (struct load_op *) pc; - struct field_ref *ref = (struct field_ref *) insn->data; - - dbg_printf("load field ref offset %u type s64\n", - ref->offset); - estack_push(stack, top, ax, bx); - estack_ax_v = - ((struct literal_numeric *) &filter_stack_data[ref->offset])->v; - dbg_printf("ref load s64 %" PRIi64 "\n", estack_ax_v); - next_pc += sizeof(struct load_op) + sizeof(struct field_ref); - PO; - } - - OP(FILTER_OP_LOAD_FIELD_REF_DOUBLE): - { - struct load_op *insn = (struct load_op *) pc; - struct field_ref *ref = (struct field_ref *) insn->data; - - dbg_printf("load field ref offset %u type double\n", - ref->offset); - estack_push(stack, top, ax, bx); - memcpy(&estack_ax(stack, top)->u.d, &filter_stack_data[ref->offset], - sizeof(struct literal_double)); - dbg_printf("ref load double %g\n", estack_ax(stack, top)->u.d); - next_pc += sizeof(struct load_op) + sizeof(struct field_ref); - PO; - } - - /* load from immediate operand */ - OP(FILTER_OP_LOAD_STRING): - { - struct load_op *insn = (struct load_op *) pc; - - dbg_printf("load string %s\n", insn->data); - estack_push(stack, top, ax, bx); - estack_ax(stack, top)->u.s.str = insn->data; - estack_ax(stack, top)->u.s.seq_len = UINT_MAX; - estack_ax(stack, top)->u.s.literal = 1; - next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; - PO; - } - - OP(FILTER_OP_LOAD_S64): - { - struct load_op *insn = (struct load_op *) pc; - - estack_push(stack, top, ax, bx); - estack_ax_v = ((struct literal_numeric *) insn->data)->v; - dbg_printf("load s64 %" PRIi64 "\n", estack_ax_v); - next_pc += sizeof(struct load_op) - + sizeof(struct literal_numeric); - PO; - } - - OP(FILTER_OP_LOAD_DOUBLE): - { - struct load_op *insn = (struct load_op *) pc; - - estack_push(stack, top, ax, bx); - memcpy(&estack_ax(stack, top)->u.d, insn->data, - sizeof(struct literal_double)); - dbg_printf("load s64 %g\n", estack_ax(stack, top)->u.d); - next_pc += sizeof(struct load_op) - + sizeof(struct literal_double); - PO; - } - - /* cast */ - OP(FILTER_OP_CAST_TO_S64): - ERR("unsupported non-specialized bytecode op %u\n", - (unsigned int) *(filter_opcode_t *) pc); - ret = -EINVAL; - goto end; - - OP(FILTER_OP_CAST_DOUBLE_TO_S64): - { - estack_ax_v = (int64_t) estack_ax(stack, top)->u.d; - next_pc += sizeof(struct cast_op); - PO; - } - - OP(FILTER_OP_CAST_NOP): - { - next_pc += sizeof(struct cast_op); - PO; - } - - /* get context ref */ - OP(FILTER_OP_GET_CONTEXT_REF_STRING): - { - struct load_op *insn = (struct load_op *) pc; - struct field_ref *ref = (struct field_ref *) insn->data; - struct lttng_ctx_field *ctx_field; - union lttng_ctx_value v; - - dbg_printf("get context ref offset %u type string\n", - ref->offset); - ctx_field = &ctx->fields[ref->offset]; - ctx_field->get_value(ctx_field, &v); - estack_push(stack, top, ax, bx); - estack_ax(stack, top)->u.s.str = v.str; - if (unlikely(!estack_ax(stack, top)->u.s.str)) { - dbg_printf("Filter warning: loading a NULL string.\n"); - ret = -EINVAL; - goto end; - } - estack_ax(stack, top)->u.s.seq_len = UINT_MAX; - estack_ax(stack, top)->u.s.literal = 0; - dbg_printf("ref get context string %s\n", estack_ax(stack, top)->u.s.str); - next_pc += sizeof(struct load_op) + sizeof(struct field_ref); - PO; - } - - OP(FILTER_OP_GET_CONTEXT_REF_S64): - { - struct load_op *insn = (struct load_op *) pc; - struct field_ref *ref = (struct field_ref *) insn->data; - struct lttng_ctx_field *ctx_field; - union lttng_ctx_value v; - - dbg_printf("get context ref offset %u type s64\n", - ref->offset); - ctx_field = &ctx->fields[ref->offset]; - ctx_field->get_value(ctx_field, &v); - estack_push(stack, top, ax, bx); - estack_ax_v = v.s64; - dbg_printf("ref get context s64 %" PRIi64 "\n", estack_ax_v); - next_pc += sizeof(struct load_op) + sizeof(struct field_ref); - PO; - } - - OP(FILTER_OP_GET_CONTEXT_REF_DOUBLE): - { - struct load_op *insn = (struct load_op *) pc; - struct field_ref *ref = (struct field_ref *) insn->data; - struct lttng_ctx_field *ctx_field; - union lttng_ctx_value v; - - dbg_printf("get context ref offset %u type double\n", - ref->offset); - ctx_field = &ctx->fields[ref->offset]; - ctx_field->get_value(ctx_field, &v); - estack_push(stack, top, ax, bx); - memcpy(&estack_ax(stack, top)->u.d, &v.d, sizeof(struct literal_double)); - dbg_printf("ref get context double %g\n", estack_ax(stack, top)->u.d); - next_pc += sizeof(struct load_op) + sizeof(struct field_ref); - PO; - } - - END_OP -end: - /* return 0 (discard) on error */ - if (ret) - return 0; - return retval; -} - -#undef START_OP -#undef OP -#undef PO -#undef END_OP