#include <string.h>
#include <inttypes.h>
#include <limits.h>
+#include <usterr-signal-safe.h>
#include "filter-bytecode.h"
#define NR_REG 2
char data[0];
};
+enum reg_type {
+ REG_S64,
+ REG_DOUBLE,
+ REG_STRING,
+ REG_TYPE_UNKNOWN,
+};
+
+/* Validation registers */
+struct vreg {
+ enum reg_type type;
+ int literal; /* is string literal ? */
+};
+
+/* Execution registers */
struct reg {
- enum {
- REG_S64,
- REG_STRING, /* NULL-terminated string */
- REG_SEQUENCE, /* non-null terminated */
- } type;
+ enum reg_type type;
int64_t v;
+ double d;
const char *str;
size_t seq_len;
[ FILTER_OP_BIN_AND ] = "BIN_AND",
[ FILTER_OP_BIN_OR ] = "BIN_OR",
[ FILTER_OP_BIN_XOR ] = "BIN_XOR",
+
+ /* binary comparators */
[ FILTER_OP_EQ ] = "EQ",
[ FILTER_OP_NE ] = "NE",
[ FILTER_OP_GT ] = "GT",
[ FILTER_OP_GE ] = "GE",
[ FILTER_OP_LE ] = "LE",
+ /* string binary comparators */
+ [ FILTER_OP_EQ_STRING ] = "EQ_STRING",
+ [ FILTER_OP_NE_STRING ] = "NE_STRING",
+ [ FILTER_OP_GT_STRING ] = "GT_STRING",
+ [ FILTER_OP_LT_STRING ] = "LT_STRING",
+ [ FILTER_OP_GE_STRING ] = "GE_STRING",
+ [ FILTER_OP_LE_STRING ] = "LE_STRING",
+
+ /* s64 binary comparators */
+ [ FILTER_OP_EQ_S64 ] = "EQ_S64",
+ [ FILTER_OP_NE_S64 ] = "NE_S64",
+ [ FILTER_OP_GT_S64 ] = "GT_S64",
+ [ FILTER_OP_LT_S64 ] = "LT_S64",
+ [ FILTER_OP_GE_S64 ] = "GE_S64",
+ [ FILTER_OP_LE_S64 ] = "LE_S64",
+
+ /* double binary comparators */
+ [ FILTER_OP_EQ_DOUBLE ] = "EQ_DOUBLE",
+ [ FILTER_OP_NE_DOUBLE ] = "NE_DOUBLE",
+ [ FILTER_OP_GT_DOUBLE ] = "GT_DOUBLE",
+ [ FILTER_OP_LT_DOUBLE ] = "LT_DOUBLE",
+ [ FILTER_OP_GE_DOUBLE ] = "GE_DOUBLE",
+ [ FILTER_OP_LE_DOUBLE ] = "LE_DOUBLE",
+
+
/* unary */
[ FILTER_OP_UNARY_PLUS ] = "UNARY_PLUS",
[ FILTER_OP_UNARY_MINUS ] = "UNARY_MINUS",
[ FILTER_OP_UNARY_NOT ] = "UNARY_NOT",
+ [ FILTER_OP_UNARY_PLUS_S64 ] = "UNARY_PLUS_S64",
+ [ FILTER_OP_UNARY_MINUS_S64 ] = "UNARY_MINUS_S64",
+ [ FILTER_OP_UNARY_NOT_S64 ] = "UNARY_NOT_S64",
+ [ FILTER_OP_UNARY_PLUS_DOUBLE ] = "UNARY_PLUS_DOUBLE",
+ [ FILTER_OP_UNARY_MINUS_DOUBLE ] = "UNARY_MINUS_DOUBLE",
+ [ FILTER_OP_UNARY_NOT_DOUBLE ] = "UNARY_NOT_DOUBLE",
/* logical */
[ FILTER_OP_AND ] = "AND",
/* load */
[ FILTER_OP_LOAD_FIELD_REF ] = "LOAD_FIELD_REF",
+ [ FILTER_OP_LOAD_FIELD_REF_STRING ] = "LOAD_FIELD_REF_STRING",
+ [ FILTER_OP_LOAD_FIELD_REF_SEQUENCE ] = "LOAD_FIELD_REF_SEQUENCE",
+ [ FILTER_OP_LOAD_FIELD_REF_S64 ] = "LOAD_FIELD_REF_S64",
+ [ FILTER_OP_LOAD_FIELD_REF_DOUBLE ] = "LOAD_FIELD_REF_DOUBLE",
+
[ FILTER_OP_LOAD_STRING ] = "LOAD_STRING",
[ FILTER_OP_LOAD_S64 ] = "LOAD_S64",
+ [ FILTER_OP_LOAD_DOUBLE ] = "LOAD_DOUBLE",
};
static
diff = 1;
break;
}
- if (reg[REG_R0].literal) {
- ret = parse_char(&p);
- if (ret == -1) {
- return 0;
- } else if (ret == -2) {
- escaped_r0 = 1;
+ if (reg[REG_R0].literal) {
+ ret = parse_char(&p);
+ if (ret == -1) {
+ return 0;
+ } else if (ret == -2) {
+ escaped_r0 = 1;
+ }
+ /* else compare both char */
+ }
+ if (reg[REG_R1].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;
+}
+
+static
+int lttng_filter_false(void *filter_data,
+ const char *filter_stack_data)
+{
+ return 0;
+}
+
+static
+int lttng_filter_interpret_bytecode(void *filter_data,
+ const char *filter_stack_data)
+{
+ struct bytecode_runtime *bytecode = filter_data;
+ void *pc, *next_pc, *start_pc;
+ int ret = -EINVAL;
+ int retval = 0;
+ struct reg reg[NR_REG];
+
+ 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) {
+ case FILTER_OP_UNKNOWN:
+ case FILTER_OP_LOAD_FIELD_REF:
+ default:
+ ERR("unknown bytecode op %u\n",
+ (unsigned int) *(filter_opcode_t *) pc);
+ ret = -EINVAL;
+ goto end;
+
+ case FILTER_OP_RETURN:
+ retval = !!reg[0].v;
+ ret = 0;
+ goto end;
+
+ /* binary */
+ case FILTER_OP_MUL:
+ case FILTER_OP_DIV:
+ case FILTER_OP_MOD:
+ case FILTER_OP_PLUS:
+ case FILTER_OP_MINUS:
+ case FILTER_OP_RSHIFT:
+ case FILTER_OP_LSHIFT:
+ case FILTER_OP_BIN_AND:
+ case FILTER_OP_BIN_OR:
+ case FILTER_OP_BIN_XOR:
+ ERR("unsupported bytecode op %u\n",
+ (unsigned int) *(filter_opcode_t *) pc);
+ ret = -EINVAL;
+ goto end;
+
+ case FILTER_OP_EQ:
+ case FILTER_OP_NE:
+ case FILTER_OP_GT:
+ case FILTER_OP_LT:
+ case FILTER_OP_GE:
+ case FILTER_OP_LE:
+ ERR("unsupported non-specialized bytecode op %u\n",
+ (unsigned int) *(filter_opcode_t *) pc);
+ ret = -EINVAL;
+ goto end;
+
+ case FILTER_OP_EQ_STRING:
+ {
+ reg[REG_R0].v = (reg_strcmp(reg, "==") == 0);
+ reg[REG_R0].type = REG_S64;
+ next_pc += sizeof(struct binary_op);
+ break;
+ }
+ case FILTER_OP_NE_STRING:
+ {
+ reg[REG_R0].v = (reg_strcmp(reg, "!=") != 0);
+ reg[REG_R0].type = REG_S64;
+ next_pc += sizeof(struct binary_op);
+ break;
+ }
+ case FILTER_OP_GT_STRING:
+ {
+ reg[REG_R0].v = (reg_strcmp(reg, ">") > 0);
+ reg[REG_R0].type = REG_S64;
+ next_pc += sizeof(struct binary_op);
+ break;
+ }
+ case FILTER_OP_LT_STRING:
+ {
+ reg[REG_R0].v = (reg_strcmp(reg, "<") < 0);
+ reg[REG_R0].type = REG_S64;
+ next_pc += sizeof(struct binary_op);
+ break;
+ }
+ case FILTER_OP_GE_STRING:
+ {
+ reg[REG_R0].v = (reg_strcmp(reg, ">=") >= 0);
+ reg[REG_R0].type = REG_S64;
+ next_pc += sizeof(struct binary_op);
+ break;
+ }
+ case FILTER_OP_LE_STRING:
+ {
+ reg[REG_R0].v = (reg_strcmp(reg, "<=") <= 0);
+ reg[REG_R0].type = REG_S64;
+ next_pc += sizeof(struct binary_op);
+ break;
+ }
+
+ case FILTER_OP_EQ_S64:
+ {
+ reg[REG_R0].v = (reg[REG_R0].v == reg[REG_R1].v);
+ reg[REG_R0].type = REG_S64;
+ next_pc += sizeof(struct binary_op);
+ break;
+ }
+ case FILTER_OP_NE_S64:
+ {
+ reg[REG_R0].v = (reg[REG_R0].v != reg[REG_R1].v);
+ reg[REG_R0].type = REG_S64;
+ next_pc += sizeof(struct binary_op);
+ break;
+ }
+ case FILTER_OP_GT_S64:
+ {
+ reg[REG_R0].v = (reg[REG_R0].v > reg[REG_R1].v);
+ reg[REG_R0].type = REG_S64;
+ next_pc += sizeof(struct binary_op);
+ break;
+ }
+ case FILTER_OP_LT_S64:
+ {
+ reg[REG_R0].v = (reg[REG_R0].v < reg[REG_R1].v);
+ reg[REG_R0].type = REG_S64;
+ next_pc += sizeof(struct binary_op);
+ break;
+ }
+ case FILTER_OP_GE_S64:
+ {
+ reg[REG_R0].v = (reg[REG_R0].v >= reg[REG_R1].v);
+ reg[REG_R0].type = REG_S64;
+ next_pc += sizeof(struct binary_op);
+ break;
+ }
+ case FILTER_OP_LE_S64:
+ {
+ reg[REG_R0].v = (reg[REG_R0].v <= reg[REG_R1].v);
+ reg[REG_R0].type = REG_S64;
+ next_pc += sizeof(struct binary_op);
+ break;
+ }
+
+ case FILTER_OP_EQ_DOUBLE:
+ {
+ if (unlikely(reg[REG_R0].type == REG_S64))
+ reg[REG_R0].d = (double) reg[REG_R0].v;
+ else if (unlikely(reg[REG_R1].type == REG_S64))
+ reg[REG_R1].d = (double) reg[REG_R1].v;
+ reg[REG_R0].v = (reg[REG_R0].d == reg[REG_R1].d);
+ reg[REG_R0].type = REG_S64;
+ next_pc += sizeof(struct binary_op);
+ break;
+ }
+ case FILTER_OP_NE_DOUBLE:
+ {
+ if (unlikely(reg[REG_R0].type == REG_S64))
+ reg[REG_R0].d = (double) reg[REG_R0].v;
+ else if (unlikely(reg[REG_R1].type == REG_S64))
+ reg[REG_R1].d = (double) reg[REG_R1].v;
+ reg[REG_R0].v = (reg[REG_R0].d != reg[REG_R1].d);
+ reg[REG_R0].type = REG_S64;
+ next_pc += sizeof(struct binary_op);
+ break;
+ }
+ case FILTER_OP_GT_DOUBLE:
+ {
+ if (unlikely(reg[REG_R0].type == REG_S64))
+ reg[REG_R0].d = (double) reg[REG_R0].v;
+ else if (unlikely(reg[REG_R1].type == REG_S64))
+ reg[REG_R1].d = (double) reg[REG_R1].v;
+ reg[REG_R0].v = (reg[REG_R0].d > reg[REG_R1].d);
+ reg[REG_R0].type = REG_S64;
+ next_pc += sizeof(struct binary_op);
+ break;
+ }
+ case FILTER_OP_LT_DOUBLE:
+ {
+ if (unlikely(reg[REG_R0].type == REG_S64))
+ reg[REG_R0].d = (double) reg[REG_R0].v;
+ else if (unlikely(reg[REG_R1].type == REG_S64))
+ reg[REG_R1].d = (double) reg[REG_R1].v;
+ reg[REG_R0].v = (reg[REG_R0].d < reg[REG_R1].d);
+ reg[REG_R0].type = REG_S64;
+ next_pc += sizeof(struct binary_op);
+ break;
+ }
+ case FILTER_OP_GE_DOUBLE:
+ {
+ if (unlikely(reg[REG_R0].type == REG_S64))
+ reg[REG_R0].d = (double) reg[REG_R0].v;
+ else if (unlikely(reg[REG_R1].type == REG_S64))
+ reg[REG_R1].d = (double) reg[REG_R1].v;
+ reg[REG_R0].v = (reg[REG_R0].d >= reg[REG_R1].d);
+ reg[REG_R0].type = REG_S64;
+ next_pc += sizeof(struct binary_op);
+ break;
+ }
+ case FILTER_OP_LE_DOUBLE:
+ {
+ if (unlikely(reg[REG_R0].type == REG_S64))
+ reg[REG_R0].d = (double) reg[REG_R0].v;
+ else if (unlikely(reg[REG_R1].type == REG_S64))
+ reg[REG_R1].d = (double) reg[REG_R1].v;
+ reg[REG_R0].v = (reg[REG_R0].d <= reg[REG_R1].d);
+ reg[REG_R0].type = REG_S64;
+ next_pc += sizeof(struct binary_op);
+ break;
+ }
+
+ /* unary */
+ case FILTER_OP_UNARY_PLUS:
+ {
+ next_pc += sizeof(struct unary_op);
+ break;
+ }
+ case FILTER_OP_UNARY_MINUS:
+ {
+ struct unary_op *insn = (struct unary_op *) pc;
+
+ switch (reg[insn->reg].type) {
+ default:
+ ERR("unknown register type\n");
+ ret = -EINVAL;
+ goto end;
+
+ case REG_STRING:
+ ERR("Unary minus can only be applied to numeric or floating point registers\n");
+ ret = -EINVAL;
+ goto end;
+ case REG_S64:
+ reg[insn->reg].v = -reg[insn->reg].v;
+ break;
+ case REG_DOUBLE:
+ reg[insn->reg].d = -reg[insn->reg].d;
+ break;
+ }
+ next_pc += sizeof(struct unary_op);
+ break;
+ }
+ case FILTER_OP_UNARY_NOT:
+ {
+ struct unary_op *insn = (struct unary_op *) pc;
+
+ switch (reg[insn->reg].type) {
+ default:
+ ERR("unknown register type\n");
+ ret = -EINVAL;
+ goto end;
+
+ case REG_STRING:
+ ERR("Unary not can only be applied to numeric or floating point registers\n");
+ ret = -EINVAL;
+ goto end;
+ case REG_S64:
+ reg[insn->reg].v = !reg[insn->reg].v;
+ break;
+ case REG_DOUBLE:
+ reg[insn->reg].d = !reg[insn->reg].d;
+ break;
+ }
+ reg[insn->reg].v = !reg[insn->reg].v;
+ next_pc += sizeof(struct unary_op);
+ break;
+ }
+ /* logical */
+ case FILTER_OP_AND:
+ {
+ struct logical_op *insn = (struct logical_op *) pc;
+
+ /* If REG_R0 is 0, skip and evaluate to 0 */
+ if ((reg[REG_R0].type == REG_S64 && reg[REG_R0].v == 0)
+ || (reg[REG_R0].type == REG_DOUBLE && reg[REG_R0].d == 0.0)) {
+ dbg_printf("Jumping to bytecode offset %u\n",
+ (unsigned int) insn->skip_offset);
+ next_pc = start_pc + insn->skip_offset;
+ } else {
+ next_pc += sizeof(struct logical_op);
+ }
+ break;
+ }
+ case FILTER_OP_OR:
+ {
+ struct logical_op *insn = (struct logical_op *) pc;
+
+ /* If REG_R0 is nonzero, skip and evaluate to 1 */
+
+ if ((reg[REG_R0].type == REG_S64 && reg[REG_R0].v != 0)
+ || (reg[REG_R0].type == REG_DOUBLE && reg[REG_R0].d != 0.0)) {
+ reg[REG_R0].v = 1;
+ dbg_printf("Jumping to bytecode offset %u\n",
+ (unsigned int) insn->skip_offset);
+ next_pc = start_pc + insn->skip_offset;
+ } else {
+ next_pc += sizeof(struct logical_op);
+ }
+ break;
+ }
+
+ /* load */
+ case 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);
+ reg[insn->reg].str =
+ *(const char * const *) &filter_stack_data[ref->offset];
+ reg[insn->reg].type = REG_STRING;
+ reg[insn->reg].seq_len = UINT_MAX;
+ reg[insn->reg].literal = 0;
+ dbg_printf("ref load string %s\n", reg[insn->reg].str);
+ next_pc += sizeof(struct load_op) + sizeof(struct field_ref);
+ break;
+ }
+
+ case 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);
+ reg[insn->reg].seq_len =
+ *(unsigned long *) &filter_stack_data[ref->offset];
+ reg[insn->reg].str =
+ *(const char **) (&filter_stack_data[ref->offset
+ + sizeof(unsigned long)]);
+ reg[insn->reg].type = REG_STRING;
+ reg[insn->reg].literal = 0;
+ next_pc += sizeof(struct load_op) + sizeof(struct field_ref);
+ break;
+ }
+
+ case 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);
+ memcpy(®[insn->reg].v, &filter_stack_data[ref->offset],
+ sizeof(struct literal_numeric));
+ reg[insn->reg].type = REG_S64;
+ reg[insn->reg].literal = 0;
+ dbg_printf("ref load s64 %" PRIi64 "\n", reg[insn->reg].v);
+ next_pc += sizeof(struct load_op) + sizeof(struct field_ref);
+ break;
+ }
+
+ case 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);
+ memcpy(®[insn->reg].d, &filter_stack_data[ref->offset],
+ sizeof(struct literal_double));
+ reg[insn->reg].type = REG_DOUBLE;
+ reg[insn->reg].literal = 0;
+ dbg_printf("ref load double %g\n", reg[insn->reg].d);
+ next_pc += sizeof(struct load_op) + sizeof(struct field_ref);
+ break;
+ }
+
+ case FILTER_OP_LOAD_STRING:
+ {
+ struct load_op *insn = (struct load_op *) pc;
+
+ dbg_printf("load string %s\n", insn->data);
+ reg[insn->reg].str = insn->data;
+ reg[insn->reg].type = REG_STRING;
+ reg[insn->reg].seq_len = UINT_MAX;
+ reg[insn->reg].literal = 1;
+ next_pc += sizeof(struct load_op) + strlen(insn->data) + 1;
+ break;
+ }
+
+ case FILTER_OP_LOAD_S64:
+ {
+ struct load_op *insn = (struct load_op *) pc;
+
+ memcpy(®[insn->reg].v, insn->data,
+ sizeof(struct literal_numeric));
+ dbg_printf("load s64 %" PRIi64 "\n", reg[insn->reg].v);
+ reg[insn->reg].type = REG_S64;
+ reg[insn->reg].literal = 1;
+ next_pc += sizeof(struct load_op)
+ + sizeof(struct literal_numeric);
+ break;
+ }
+
+ case FILTER_OP_LOAD_DOUBLE:
+ {
+ struct load_op *insn = (struct load_op *) pc;
+
+ memcpy(®[insn->reg].d, insn->data,
+ sizeof(struct literal_double));
+ dbg_printf("load s64 %g\n", reg[insn->reg].d);
+ reg[insn->reg].type = REG_DOUBLE;
+ reg[insn->reg].literal = 1;
+ next_pc += sizeof(struct load_op)
+ + sizeof(struct literal_double);
+ break;
+ }
+ }
+ }
+end:
+ /* return 0 (discard) on error */
+ if (ret)
+ return 0;
+ return retval;
+}
+
+static
+int bin_op_compare_check(struct vreg reg[NR_REG], const char *str)
+{
+ switch (reg[REG_R0].type) {
+ default:
+ goto error_unknown;
+
+ case REG_STRING:
+ switch (reg[REG_R1].type) {
+ default:
+ goto error_unknown;
+
+ case REG_STRING:
+ break;
+ case REG_S64:
+ case REG_DOUBLE:
+ goto error_mismatch;
+ }
+ break;
+ case REG_S64:
+ case REG_DOUBLE:
+ switch (reg[REG_R1].type) {
+ default:
+ goto error_unknown;
+
+ case REG_STRING:
+ goto error_mismatch;
+
+ case REG_S64:
+ case REG_DOUBLE:
+ break;
+ }
+ break;
+ }
+ return 0;
+
+error_unknown:
+
+ return -EINVAL;
+error_mismatch:
+ ERR("type mismatch for '%s' binary operator\n", str);
+ return -EINVAL;
+}
+
+static
+int lttng_filter_validate_bytecode(struct bytecode_runtime *bytecode)
+{
+ void *pc, *next_pc, *start_pc;
+ int ret = -EINVAL;
+ struct vreg reg[NR_REG];
+ int i;
+
+ for (i = 0; i < NR_REG; i++) {
+ reg[i].type = REG_TYPE_UNKNOWN;
+ reg[i].literal = 0;
+ }
+
+ start_pc = &bytecode->data[0];
+ for (pc = next_pc = start_pc; pc - start_pc < bytecode->len;
+ pc = next_pc) {
+ if (unlikely(pc >= start_pc + bytecode->len)) {
+ ERR("filter bytecode overflow\n");
+ ret = -EINVAL;
+ goto end;
+ }
+ dbg_printf("Validating op %s (%u)\n",
+ print_op((unsigned int) *(filter_opcode_t *) pc),
+ (unsigned int) *(filter_opcode_t *) pc);
+ switch (*(filter_opcode_t *) pc) {
+ case FILTER_OP_UNKNOWN:
+ default:
+ ERR("unknown bytecode op %u\n",
+ (unsigned int) *(filter_opcode_t *) pc);
+ ret = -EINVAL;
+ goto end;
+
+ case FILTER_OP_RETURN:
+ ret = 0;
+ goto end;
+
+ /* binary */
+ case FILTER_OP_MUL:
+ case FILTER_OP_DIV:
+ case FILTER_OP_MOD:
+ case FILTER_OP_PLUS:
+ case FILTER_OP_MINUS:
+ case FILTER_OP_RSHIFT:
+ case FILTER_OP_LSHIFT:
+ case FILTER_OP_BIN_AND:
+ case FILTER_OP_BIN_OR:
+ case FILTER_OP_BIN_XOR:
+ ERR("unsupported bytecode op %u\n",
+ (unsigned int) *(filter_opcode_t *) pc);
+ ret = -EINVAL;
+ goto end;
+
+ case FILTER_OP_EQ:
+ {
+ ret = bin_op_compare_check(reg, "==");
+ if (ret)
+ goto end;
+ reg[REG_R0].type = REG_S64;
+ next_pc += sizeof(struct binary_op);
+ break;
+ }
+ case FILTER_OP_NE:
+ {
+ ret = bin_op_compare_check(reg, "!=");
+ if (ret)
+ goto end;
+ reg[REG_R0].type = REG_S64;
+ next_pc += sizeof(struct binary_op);
+ break;
+ }
+ case FILTER_OP_GT:
+ {
+ ret = bin_op_compare_check(reg, ">");
+ if (ret)
+ goto end;
+ reg[REG_R0].type = REG_S64;
+ next_pc += sizeof(struct binary_op);
+ break;
+ }
+ case FILTER_OP_LT:
+ {
+ ret = bin_op_compare_check(reg, "<");
+ if (ret)
+ goto end;
+ reg[REG_R0].type = REG_S64;
+ next_pc += sizeof(struct binary_op);
+ break;
+ }
+ case FILTER_OP_GE:
+ {
+ ret = bin_op_compare_check(reg, ">=");
+ if (ret)
+ goto end;
+ reg[REG_R0].type = REG_S64;
+ next_pc += sizeof(struct binary_op);
+ break;
+ }
+ case FILTER_OP_LE:
+ {
+ ret = bin_op_compare_check(reg, "<=");
+ if (ret)
+ goto end;
+ reg[REG_R0].type = REG_S64;
+ next_pc += sizeof(struct binary_op);
+ break;
+ }
+
+ case FILTER_OP_EQ_STRING:
+ case FILTER_OP_NE_STRING:
+ case FILTER_OP_GT_STRING:
+ case FILTER_OP_LT_STRING:
+ case FILTER_OP_GE_STRING:
+ case FILTER_OP_LE_STRING:
+ {
+ if (reg[REG_R0].type != REG_STRING
+ || reg[REG_R1].type != REG_STRING) {
+ ERR("Unexpected register type for string comparator\n");
+ ret = -EINVAL;
+ goto end;
+ }
+ reg[REG_R0].type = REG_S64;
+ next_pc += sizeof(struct binary_op);
+ break;
+ }
+
+ case FILTER_OP_EQ_S64:
+ case FILTER_OP_NE_S64:
+ case FILTER_OP_GT_S64:
+ case FILTER_OP_LT_S64:
+ case FILTER_OP_GE_S64:
+ case FILTER_OP_LE_S64:
+ {
+ if (reg[REG_R0].type != REG_S64
+ || reg[REG_R1].type != REG_S64) {
+ ERR("Unexpected register type for s64 comparator\n");
+ ret = -EINVAL;
+ goto end;
+ }
+ reg[REG_R0].type = REG_S64;
+ next_pc += sizeof(struct binary_op);
+ break;
+ }
+
+ case FILTER_OP_EQ_DOUBLE:
+ case FILTER_OP_NE_DOUBLE:
+ case FILTER_OP_GT_DOUBLE:
+ case FILTER_OP_LT_DOUBLE:
+ case FILTER_OP_GE_DOUBLE:
+ case FILTER_OP_LE_DOUBLE:
+ {
+ if ((reg[REG_R0].type != REG_DOUBLE && reg[REG_R0].type != REG_S64)
+ || (reg[REG_R1].type != REG_DOUBLE && reg[REG_R1].type != REG_S64)) {
+ ERR("Unexpected register type for double comparator\n");
+ ret = -EINVAL;
+ goto end;
+ }
+ reg[REG_R0].type = REG_DOUBLE;
+ next_pc += sizeof(struct binary_op);
+ break;
+ }
+
+ /* unary */
+ case FILTER_OP_UNARY_PLUS:
+ case FILTER_OP_UNARY_MINUS:
+ case FILTER_OP_UNARY_NOT:
+ {
+ struct unary_op *insn = (struct unary_op *) pc;
+
+ if (unlikely(insn->reg >= REG_ERROR)) {
+ ERR("invalid register %u\n",
+ (unsigned int) insn->reg);
+ ret = -EINVAL;
+ goto end;
+ }
+ switch (reg[insn->reg].type) {
+ default:
+ ERR("unknown register type\n");
+ ret = -EINVAL;
+ goto end;
+
+ case REG_STRING:
+ ERR("Unary op can only be applied to numeric or floating point registers\n");
+ ret = -EINVAL;
+ goto end;
+ case REG_S64:
+ break;
+ case REG_DOUBLE:
+ break;
+ }
+ next_pc += sizeof(struct unary_op);
+ break;
+ }
+
+ case FILTER_OP_UNARY_PLUS_S64:
+ case FILTER_OP_UNARY_MINUS_S64:
+ case FILTER_OP_UNARY_NOT_S64:
+ {
+ struct unary_op *insn = (struct unary_op *) pc;
+
+ if (unlikely(insn->reg >= REG_ERROR)) {
+ ERR("invalid register %u\n",
+ (unsigned int) insn->reg);
+ ret = -EINVAL;
+ goto end;
+ }
+ if (reg[insn->reg].type != REG_S64) {
+ ERR("Invalid register type\n");
+ ret = -EINVAL;
+ goto end;
+ }
+ next_pc += sizeof(struct unary_op);
+ break;
+ }
+
+ case FILTER_OP_UNARY_PLUS_DOUBLE:
+ case FILTER_OP_UNARY_MINUS_DOUBLE:
+ case FILTER_OP_UNARY_NOT_DOUBLE:
+ {
+ struct unary_op *insn = (struct unary_op *) pc;
+
+ if (unlikely(insn->reg >= REG_ERROR)) {
+ ERR("invalid register %u\n",
+ (unsigned int) insn->reg);
+ ret = -EINVAL;
+ goto end;
+ }
+ if (reg[insn->reg].type != REG_DOUBLE) {
+ ERR("Invalid register type\n");
+ ret = -EINVAL;
+ goto end;
+ }
+ next_pc += sizeof(struct unary_op);
+ break;
+ }
+
+ /* logical */
+ case FILTER_OP_AND:
+ case FILTER_OP_OR:
+ {
+ struct logical_op *insn = (struct logical_op *) pc;
+
+ if (unlikely(reg[REG_R0].type == REG_TYPE_UNKNOWN
+ || reg[REG_R1].type == REG_TYPE_UNKNOWN
+ || reg[REG_R0].type == REG_STRING
+ || reg[REG_R1].type == REG_STRING)) {
+ ERR("Logical comparator can only be applied to numeric and floating point registers\n");
+ ret = -EINVAL;
+ goto end;
+ }
+
+ dbg_printf("Validate jumping to bytecode offset %u\n",
+ (unsigned int) insn->skip_offset);
+ if (unlikely(start_pc + insn->skip_offset <= pc)) {
+ ERR("Loops are not allowed in bytecode\n");
+ ret = -EINVAL;
+ goto end;
+ }
+ next_pc += sizeof(struct logical_op);
+ break;
+ }
+
+ /* load */
+ case FILTER_OP_LOAD_FIELD_REF:
+ {
+ ERR("Unknown field ref type\n");
+ ret = -EINVAL;
+ goto end;
+ }
+ case FILTER_OP_LOAD_FIELD_REF_STRING:
+ case FILTER_OP_LOAD_FIELD_REF_SEQUENCE:
+ {
+ struct load_op *insn = (struct load_op *) pc;
+ struct field_ref *ref = (struct field_ref *) insn->data;
+
+ if (unlikely(insn->reg >= REG_ERROR)) {
+ ERR("invalid register %u\n",
+ (unsigned int) insn->reg);
+ ret = -EINVAL;
+ goto end;
+ }
+ dbg_printf("Validate load field ref offset %u type string\n",
+ ref->offset);
+ reg[insn->reg].type = REG_STRING;
+ reg[insn->reg].literal = 0;
+ next_pc += sizeof(struct load_op) + sizeof(struct field_ref);
+ break;
+ }
+ case FILTER_OP_LOAD_FIELD_REF_S64:
+ {
+ struct load_op *insn = (struct load_op *) pc;
+ struct field_ref *ref = (struct field_ref *) insn->data;
+
+ if (unlikely(insn->reg >= REG_ERROR)) {
+ ERR("invalid register %u\n",
+ (unsigned int) insn->reg);
+ ret = -EINVAL;
+ goto end;
+ }
+ dbg_printf("Validate load field ref offset %u type s64\n",
+ ref->offset);
+ reg[insn->reg].type = REG_S64;
+ reg[insn->reg].literal = 0;
+ next_pc += sizeof(struct load_op) + sizeof(struct field_ref);
+ break;
+ }
+ case FILTER_OP_LOAD_FIELD_REF_DOUBLE:
+ {
+ struct load_op *insn = (struct load_op *) pc;
+ struct field_ref *ref = (struct field_ref *) insn->data;
+
+ if (unlikely(insn->reg >= REG_ERROR)) {
+ ERR("invalid register %u\n",
+ (unsigned int) insn->reg);
+ ret = -EINVAL;
+ goto end;
+ }
+ dbg_printf("Validate load field ref offset %u type double\n",
+ ref->offset);
+ reg[insn->reg].type = REG_DOUBLE;
+ reg[insn->reg].literal = 0;
+ next_pc += sizeof(struct load_op) + sizeof(struct field_ref);
+ break;
+ }
+
+ case FILTER_OP_LOAD_STRING:
+ {
+ struct load_op *insn = (struct load_op *) pc;
+
+ if (unlikely(insn->reg >= REG_ERROR)) {
+ ERR("invalid register %u\n",
+ (unsigned int) insn->reg);
+ ret = -EINVAL;
+ goto end;
+ }
+ reg[insn->reg].type = REG_STRING;
+ reg[insn->reg].literal = 1;
+ next_pc += sizeof(struct load_op) + strlen(insn->data) + 1;
+ break;
+ }
+
+ case FILTER_OP_LOAD_S64:
+ {
+ struct load_op *insn = (struct load_op *) pc;
+
+ if (unlikely(insn->reg >= REG_ERROR)) {
+ ERR("invalid register %u\n",
+ (unsigned int) insn->reg);
+ ret = -EINVAL;
+ goto end;
}
- /* else compare both char */
+ reg[insn->reg].type = REG_S64;
+ reg[insn->reg].literal = 1;
+ next_pc += sizeof(struct load_op)
+ + sizeof(struct literal_numeric);
+ break;
}
- if (reg[REG_R1].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;
+
+ case FILTER_OP_LOAD_DOUBLE:
+ {
+ struct load_op *insn = (struct load_op *) pc;
+
+ if (unlikely(insn->reg >= REG_ERROR)) {
+ ERR("invalid register %u\n",
+ (unsigned int) insn->reg);
+ ret = -EINVAL;
+ goto end;
}
- } else {
- if (escaped_r0)
- return 1;
- }
- diff = *p - *q;
- if (diff != 0)
+ reg[insn->reg].type = REG_DOUBLE;
+ reg[insn->reg].literal = 1;
+ next_pc += sizeof(struct load_op)
+ + sizeof(struct literal_double);
break;
- p++;
- q++;
+ }
+ }
}
- return diff;
-}
-
-static
-int lttng_filter_false(void *filter_data,
- const char *filter_stack_data)
-{
- return 0;
+end:
+ return ret;
}
static
-int lttng_filter_interpret_bytecode(void *filter_data,
- const char *filter_stack_data)
+int lttng_filter_specialize_bytecode(struct bytecode_runtime *bytecode)
{
- struct bytecode_runtime *bytecode = filter_data;
void *pc, *next_pc, *start_pc;
int ret = -EINVAL;
- int retval = 0;
- struct reg reg[NR_REG];
+ struct vreg reg[NR_REG];
int i;
for (i = 0; i < NR_REG; i++) {
- reg[i].type = REG_S64;
- reg[i].v = 0;
- reg[i].str = NULL;
- reg[i].seq_len = 0;
+ reg[i].type = REG_TYPE_UNKNOWN;
reg[i].literal = 0;
}
start_pc = &bytecode->data[0];
for (pc = next_pc = start_pc; pc - start_pc < bytecode->len;
pc = next_pc) {
- if (unlikely(pc >= start_pc + bytecode->len)) {
- fprintf(stderr, "[error] filter bytecode overflow\n");
- ret = -EINVAL;
- goto end;
- }
- 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) {
case FILTER_OP_UNKNOWN:
default:
- fprintf(stderr, "[error] unknown bytecode op %u\n",
+ ERR("unknown bytecode op %u\n",
(unsigned int) *(filter_opcode_t *) pc);
ret = -EINVAL;
goto end;
case FILTER_OP_RETURN:
- retval = !!reg[0].v;
ret = 0;
goto end;
case FILTER_OP_BIN_AND:
case FILTER_OP_BIN_OR:
case FILTER_OP_BIN_XOR:
- fprintf(stderr, "[error] unsupported bytecode op %u\n",
+ ERR("unsupported bytecode op %u\n",
(unsigned int) *(filter_opcode_t *) pc);
ret = -EINVAL;
goto end;
case FILTER_OP_EQ:
{
- if (unlikely((reg[REG_R0].type == REG_S64 && reg[REG_R1].type != REG_S64)
- || (reg[REG_R0].type != REG_S64 && reg[REG_R1].type == REG_S64))) {
- fprintf(stderr, "[error] type mismatch for '==' binary operator\n");
- ret = -EINVAL;
- goto end;
- }
- switch (reg[REG_R0].type) {
+ struct binary_op *insn = (struct binary_op *) pc;
+
+ switch(reg[REG_R0].type) {
default:
- fprintf(stderr, "[error] unknown register type\n");
+ ERR("unknown register type\n");
ret = -EINVAL;
goto end;
case REG_STRING:
- case REG_SEQUENCE:
- reg[REG_R0].v = (reg_strcmp(reg, "==") == 0);
+ insn->op = FILTER_OP_EQ_STRING;
break;
case REG_S64:
- reg[REG_R0].v = (reg[REG_R0].v == reg[REG_R1].v);
+ if (reg[REG_R1].type == REG_S64)
+ insn->op = FILTER_OP_EQ_S64;
+ else
+ insn->op = FILTER_OP_EQ_DOUBLE;
+ break;
+ case REG_DOUBLE:
+ insn->op = FILTER_OP_EQ_DOUBLE;
break;
}
reg[REG_R0].type = REG_S64;
next_pc += sizeof(struct binary_op);
break;
}
+
case FILTER_OP_NE:
{
- if (unlikely((reg[REG_R0].type == REG_S64 && reg[REG_R1].type != REG_S64)
- || (reg[REG_R0].type != REG_S64 && reg[REG_R1].type == REG_S64))) {
- fprintf(stderr, "[error] type mismatch for '!=' binary operator\n");
- ret = -EINVAL;
- goto end;
- }
- switch (reg[REG_R0].type) {
+ struct binary_op *insn = (struct binary_op *) pc;
+
+ switch(reg[REG_R0].type) {
default:
- fprintf(stderr, "[error] unknown register type\n");
+ ERR("unknown register type\n");
ret = -EINVAL;
goto end;
case REG_STRING:
- case REG_SEQUENCE:
- reg[REG_R0].v = (reg_strcmp(reg, "!=") != 0);
+ insn->op = FILTER_OP_NE_STRING;
break;
case REG_S64:
- reg[REG_R0].v = (reg[REG_R0].v != reg[REG_R1].v);
+ if (reg[REG_R1].type == REG_S64)
+ insn->op = FILTER_OP_NE_S64;
+ else
+ insn->op = FILTER_OP_NE_DOUBLE;
+ break;
+ case REG_DOUBLE:
+ insn->op = FILTER_OP_NE_DOUBLE;
break;
}
reg[REG_R0].type = REG_S64;
next_pc += sizeof(struct binary_op);
break;
}
+
case FILTER_OP_GT:
{
- if (unlikely((reg[REG_R0].type == REG_S64 && reg[REG_R1].type != REG_S64)
- || (reg[REG_R0].type != REG_S64 && reg[REG_R1].type == REG_S64))) {
- fprintf(stderr, "[error] type mismatch for '>' binary operator\n");
- ret = -EINVAL;
- goto end;
- }
- switch (reg[REG_R0].type) {
+ struct binary_op *insn = (struct binary_op *) pc;
+
+ switch(reg[REG_R0].type) {
default:
- fprintf(stderr, "[error] unknown register type\n");
+ ERR("unknown register type\n");
ret = -EINVAL;
goto end;
case REG_STRING:
- case REG_SEQUENCE:
- reg[REG_R0].v = (reg_strcmp(reg, ">") > 0);
+ insn->op = FILTER_OP_GT_STRING;
break;
case REG_S64:
- reg[REG_R0].v = (reg[REG_R0].v > reg[REG_R1].v);
+ if (reg[REG_R1].type == REG_S64)
+ insn->op = FILTER_OP_GT_S64;
+ else
+ insn->op = FILTER_OP_GT_DOUBLE;
+ break;
+ case REG_DOUBLE:
+ insn->op = FILTER_OP_GT_DOUBLE;
break;
}
reg[REG_R0].type = REG_S64;
next_pc += sizeof(struct binary_op);
break;
}
+
case FILTER_OP_LT:
{
- if (unlikely((reg[REG_R0].type == REG_S64 && reg[REG_R1].type != REG_S64)
- || (reg[REG_R0].type != REG_S64 && reg[REG_R1].type == REG_S64))) {
- fprintf(stderr, "[error] type mismatch for '<' binary operator\n");
- ret = -EINVAL;
- goto end;
- }
- switch (reg[REG_R0].type) {
+ struct binary_op *insn = (struct binary_op *) pc;
+
+ switch(reg[REG_R0].type) {
default:
- fprintf(stderr, "[error] unknown register type\n");
+ ERR("unknown register type\n");
ret = -EINVAL;
goto end;
case REG_STRING:
- case REG_SEQUENCE:
- reg[REG_R0].v = (reg_strcmp(reg, "<") < 0);
+ insn->op = FILTER_OP_LT_STRING;
break;
case REG_S64:
- reg[REG_R0].v = (reg[REG_R0].v < reg[REG_R1].v);
+ if (reg[REG_R1].type == REG_S64)
+ insn->op = FILTER_OP_LT_S64;
+ else
+ insn->op = FILTER_OP_LT_DOUBLE;
+ break;
+ case REG_DOUBLE:
+ insn->op = FILTER_OP_LT_DOUBLE;
break;
}
reg[REG_R0].type = REG_S64;
next_pc += sizeof(struct binary_op);
break;
}
+
case FILTER_OP_GE:
{
- if (unlikely((reg[REG_R0].type == REG_S64 && reg[REG_R1].type != REG_S64)
- || (reg[REG_R0].type != REG_S64 && reg[REG_R1].type == REG_S64))) {
- fprintf(stderr, "[error] type mismatch for '>=' binary operator\n");
- ret = -EINVAL;
- goto end;
- }
- switch (reg[REG_R0].type) {
+ struct binary_op *insn = (struct binary_op *) pc;
+
+ switch(reg[REG_R0].type) {
default:
- fprintf(stderr, "[error] unknown register type\n");
+ ERR("unknown register type\n");
ret = -EINVAL;
goto end;
case REG_STRING:
- case REG_SEQUENCE:
- reg[REG_R0].v = (reg_strcmp(reg, ">=") >= 0);
+ insn->op = FILTER_OP_GE_STRING;
break;
case REG_S64:
- reg[REG_R0].v = (reg[REG_R0].v >= reg[REG_R1].v);
+ if (reg[REG_R1].type == REG_S64)
+ insn->op = FILTER_OP_GE_S64;
+ else
+ insn->op = FILTER_OP_GE_DOUBLE;
+ break;
+ case REG_DOUBLE:
+ insn->op = FILTER_OP_GE_DOUBLE;
break;
}
reg[REG_R0].type = REG_S64;
}
case FILTER_OP_LE:
{
- if (unlikely((reg[REG_R0].type == REG_S64 && reg[REG_R1].type != REG_S64)
- || (reg[REG_R0].type != REG_S64 && reg[REG_R1].type == REG_S64))) {
- fprintf(stderr, "[error] type mismatch for '<=' binary operator\n");
- ret = -EINVAL;
- goto end;
- }
- switch (reg[REG_R0].type) {
+ struct binary_op *insn = (struct binary_op *) pc;
+
+ switch(reg[REG_R0].type) {
default:
- fprintf(stderr, "[error] unknown register type\n");
+ ERR("unknown register type\n");
ret = -EINVAL;
goto end;
case REG_STRING:
- case REG_SEQUENCE:
- reg[REG_R0].v = (reg_strcmp(reg, "<=") <= 0);
+ insn->op = FILTER_OP_LE_STRING;
break;
case REG_S64:
- reg[REG_R0].v = (reg[REG_R0].v <= reg[REG_R1].v);
+ if (reg[REG_R1].type == REG_S64)
+ insn->op = FILTER_OP_LE_S64;
+ else
+ insn->op = FILTER_OP_LE_DOUBLE;
+ break;
+ case REG_DOUBLE:
+ insn->op = FILTER_OP_LE_DOUBLE;
break;
}
reg[REG_R0].type = REG_S64;
break;
}
+ case FILTER_OP_EQ_STRING:
+ case FILTER_OP_NE_STRING:
+ case FILTER_OP_GT_STRING:
+ case FILTER_OP_LT_STRING:
+ case FILTER_OP_GE_STRING:
+ case FILTER_OP_LE_STRING:
+ case FILTER_OP_EQ_S64:
+ case FILTER_OP_NE_S64:
+ case FILTER_OP_GT_S64:
+ case FILTER_OP_LT_S64:
+ case FILTER_OP_GE_S64:
+ case FILTER_OP_LE_S64:
+ case FILTER_OP_EQ_DOUBLE:
+ case FILTER_OP_NE_DOUBLE:
+ case FILTER_OP_GT_DOUBLE:
+ case FILTER_OP_LT_DOUBLE:
+ case FILTER_OP_GE_DOUBLE:
+ case FILTER_OP_LE_DOUBLE:
+ {
+ reg[REG_R0].type = REG_S64;
+ next_pc += sizeof(struct binary_op);
+ break;
+ }
+
+
/* unary */
case FILTER_OP_UNARY_PLUS:
{
struct unary_op *insn = (struct unary_op *) pc;
- if (unlikely(insn->reg >= REG_ERROR)) {
- fprintf(stderr, "[error] invalid register %u\n",
- (unsigned int) insn->reg);
- ret = -EINVAL;
- goto end;
- }
- if (unlikely(reg[insn->reg].type != REG_S64)) {
- fprintf(stderr, "[error] Unary plus can only be applied to numeric register\n");
+ switch(reg[insn->reg].type) {
+ default:
+ ERR("unknown register type\n");
ret = -EINVAL;
goto end;
+
+ case REG_S64:
+ insn->op = FILTER_OP_UNARY_PLUS_S64;
+ break;
+ case REG_DOUBLE:
+ insn->op = FILTER_OP_UNARY_PLUS_DOUBLE;
+ break;
}
- next_pc += sizeof(struct unary_op);
break;
}
+
case FILTER_OP_UNARY_MINUS:
{
struct unary_op *insn = (struct unary_op *) pc;
- if (unlikely(insn->reg >= REG_ERROR)) {
- fprintf(stderr, "[error] invalid register %u\n",
- (unsigned int) insn->reg);
- ret = -EINVAL;
- goto end;
- }
- if (unlikely(reg[insn->reg].type != REG_S64)) {
- fprintf(stderr, "[error] Unary minus can only be applied to numeric register\n");
+ switch(reg[insn->reg].type) {
+ default:
+ ERR("unknown register type\n");
ret = -EINVAL;
goto end;
+
+ case REG_S64:
+ insn->op = FILTER_OP_UNARY_MINUS_S64;
+ break;
+ case REG_DOUBLE:
+ insn->op = FILTER_OP_UNARY_MINUS_DOUBLE;
+ break;
}
- reg[insn->reg].v = -reg[insn->reg].v;
- next_pc += sizeof(struct unary_op);
break;
}
+
case FILTER_OP_UNARY_NOT:
{
struct unary_op *insn = (struct unary_op *) pc;
- if (unlikely(insn->reg >= REG_ERROR)) {
- fprintf(stderr, "[error] invalid register %u\n",
- (unsigned int) insn->reg);
- ret = -EINVAL;
- goto end;
- }
- if (unlikely(reg[insn->reg].type != REG_S64)) {
- fprintf(stderr, "[error] Unary not can only be applied to numeric register\n");
+ switch(reg[insn->reg].type) {
+ default:
+ ERR("unknown register type\n");
ret = -EINVAL;
goto end;
+
+ case REG_S64:
+ insn->op = FILTER_OP_UNARY_NOT_S64;
+ break;
+ case REG_DOUBLE:
+ insn->op = FILTER_OP_UNARY_NOT_DOUBLE;
+ break;
}
- reg[insn->reg].v = !reg[insn->reg].v;
- next_pc += sizeof(struct unary_op);
break;
}
- /* logical */
- case FILTER_OP_AND:
- {
- struct logical_op *insn = (struct logical_op *) pc;
-
- if (unlikely(reg[REG_R0].type != REG_S64)) {
- fprintf(stderr, "[error] Logical operator 'and' can only be applied to numeric register\n");
- ret = -EINVAL;
- goto end;
- }
- /* If REG_R0 is 0, skip and evaluate to 0 */
- if (reg[REG_R0].v == 0) {
- dbg_printf("Jumping to bytecode offset %u\n",
- (unsigned int) insn->skip_offset);
- next_pc = start_pc + insn->skip_offset;
- if (unlikely(next_pc <= pc)) {
- fprintf(stderr, "[error] Loops are not allowed in bytecode\n");
- ret = -EINVAL;
- goto end;
- }
- } else {
- next_pc += sizeof(struct logical_op);
- }
+ case FILTER_OP_UNARY_PLUS_S64:
+ case FILTER_OP_UNARY_MINUS_S64:
+ case FILTER_OP_UNARY_NOT_S64:
+ case FILTER_OP_UNARY_PLUS_DOUBLE:
+ case FILTER_OP_UNARY_MINUS_DOUBLE:
+ case FILTER_OP_UNARY_NOT_DOUBLE:
+ {
+ next_pc += sizeof(struct unary_op);
break;
}
+
+ /* logical */
+ case FILTER_OP_AND:
case FILTER_OP_OR:
{
- struct logical_op *insn = (struct logical_op *) pc;
-
- if (unlikely(reg[REG_R0].type != REG_S64)) {
- fprintf(stderr, "[error] Logical operator 'and' can only be applied to numeric register\n");
- ret = -EINVAL;
- goto end;
- }
-
- /* If REG_R0 is nonzero, skip and evaluate to 1 */
- if (reg[REG_R0].v != 0) {
- reg[REG_R0].v = 1;
- dbg_printf("Jumping to bytecode offset %u\n",
- (unsigned int) insn->skip_offset);
- next_pc = start_pc + insn->skip_offset;
- if (unlikely(next_pc <= pc)) {
- fprintf(stderr, "[error] Loops are not allowed in bytecode\n");
- ret = -EINVAL;
- goto end;
- }
- } else {
- next_pc += sizeof(struct logical_op);
- }
+ next_pc += sizeof(struct logical_op);
break;
}
/* load */
case FILTER_OP_LOAD_FIELD_REF:
+ {
+ ERR("Unknown field ref type\n");
+ ret = -EINVAL;
+ goto end;
+ }
+ case FILTER_OP_LOAD_FIELD_REF_STRING:
+ case FILTER_OP_LOAD_FIELD_REF_SEQUENCE:
{
struct load_op *insn = (struct load_op *) pc;
- struct field_ref *ref = (struct field_ref *) insn->data;
- if (unlikely(insn->reg >= REG_ERROR)) {
- fprintf(stderr, "[error] invalid register %u\n",
- (unsigned int) insn->reg);
- ret = -EINVAL;
- goto end;
- }
- dbg_printf("load field ref offset %u type %u\n",
- ref->offset, ref->type);
- switch (ref->type) {
- case FIELD_REF_UNKNOWN:
- default:
- fprintf(stderr, "[error] unknown field ref type\n");
- ret = -EINVAL;
- goto end;
+ reg[insn->reg].type = REG_STRING;
+ reg[insn->reg].literal = 0;
+ next_pc += sizeof(struct load_op) + sizeof(struct field_ref);
+ break;
+ }
+ case FILTER_OP_LOAD_FIELD_REF_S64:
+ {
+ struct load_op *insn = (struct load_op *) pc;
- case FIELD_REF_STRING:
- reg[insn->reg].str =
- *(const char * const *) &filter_stack_data[ref->offset];
- reg[insn->reg].type = REG_STRING;
- reg[insn->reg].seq_len = UINT_MAX;
- reg[insn->reg].literal = 0;
- dbg_printf("ref load string %s\n", reg[insn->reg].str);
- break;
- case FIELD_REF_SEQUENCE:
- reg[insn->reg].seq_len =
- *(unsigned long *) &filter_stack_data[ref->offset];
- reg[insn->reg].str =
- *(const char **) (&filter_stack_data[ref->offset
- + sizeof(unsigned long)]);
- reg[insn->reg].type = REG_SEQUENCE;
- reg[insn->reg].literal = 0;
- break;
- case FIELD_REF_S64:
- memcpy(®[insn->reg].v, &filter_stack_data[ref->offset],
- sizeof(struct literal_numeric));
- reg[insn->reg].type = REG_S64;
- reg[insn->reg].literal = 0;
- dbg_printf("ref load s64 %" PRIi64 "\n", reg[insn->reg].v);
- break;
- }
+ reg[insn->reg].type = REG_S64;
+ reg[insn->reg].literal = 0;
+ next_pc += sizeof(struct load_op) + sizeof(struct field_ref);
+ break;
+ }
+ case FILTER_OP_LOAD_FIELD_REF_DOUBLE:
+ {
+ struct load_op *insn = (struct load_op *) pc;
+ reg[insn->reg].type = REG_DOUBLE;
+ reg[insn->reg].literal = 0;
next_pc += sizeof(struct load_op) + sizeof(struct field_ref);
break;
}
{
struct load_op *insn = (struct load_op *) pc;
- if (unlikely(insn->reg >= REG_ERROR)) {
- fprintf(stderr, "[error] invalid register %u\n",
- (unsigned int) insn->reg);
- ret = -EINVAL;
- goto end;
- }
- dbg_printf("load string %s\n", insn->data);
- reg[insn->reg].str = insn->data;
reg[insn->reg].type = REG_STRING;
- reg[insn->reg].seq_len = UINT_MAX;
reg[insn->reg].literal = 1;
next_pc += sizeof(struct load_op) + strlen(insn->data) + 1;
break;
{
struct load_op *insn = (struct load_op *) pc;
- if (unlikely(insn->reg >= REG_ERROR)) {
- fprintf(stderr, "[error] invalid register %u\n",
- (unsigned int) insn->reg);
- ret = -EINVAL;
- goto end;
- }
- memcpy(®[insn->reg].v, insn->data,
- sizeof(struct literal_numeric));
- dbg_printf("load s64 %" PRIi64 "\n", reg[insn->reg].v);
reg[insn->reg].type = REG_S64;
+ reg[insn->reg].literal = 1;
next_pc += sizeof(struct load_op)
+ sizeof(struct literal_numeric);
break;
}
+
+ case FILTER_OP_LOAD_DOUBLE:
+ {
+ struct load_op *insn = (struct load_op *) pc;
+
+ reg[insn->reg].type = REG_DOUBLE;
+ reg[insn->reg].literal = 1;
+ next_pc += sizeof(struct load_op)
+ + sizeof(struct literal_double);
+ break;
+ }
}
}
end:
- /* return 0 (discard) on error */
- if (ret)
- return 0;
- return retval;
+ return ret;
}
+
+
static
int apply_field_reloc(struct ltt_event *event,
struct bytecode_runtime *runtime,
const struct lttng_event_field *fields, *field = NULL;
unsigned int nr_fields, i;
struct field_ref *field_ref;
+ struct load_op *op;
uint32_t field_offset = 0;
dbg_printf("Apply reloc: %u %s\n", reloc_offset, field_name);
break;
case atype_float:
field_offset += sizeof(double);
+ break;
default:
return -EINVAL;
}
return -EINVAL;
/* set type */
- field_ref = (struct field_ref *) &runtime->data[reloc_offset];
+ op = (struct load_op *) &runtime->data[reloc_offset];
+ field_ref = (struct field_ref *) op->data;
switch (field->type.atype) {
case atype_integer:
case atype_enum:
- field_ref->type = FIELD_REF_S64;
- field_ref->type = FIELD_REF_S64;
+ op->op = FILTER_OP_LOAD_FIELD_REF_S64;
break;
case atype_array:
case atype_sequence:
- field_ref->type = FIELD_REF_SEQUENCE;
+ op->op = FILTER_OP_LOAD_FIELD_REF_SEQUENCE;
break;
case atype_string:
- field_ref->type = FIELD_REF_STRING;
+ op->op = FILTER_OP_LOAD_FIELD_REF_STRING;
break;
case atype_float:
- return -EINVAL;
+ op->op = FILTER_OP_LOAD_FIELD_REF_DOUBLE;
+ break;
default:
return -EINVAL;
}
}
next_offset = offset + sizeof(uint16_t) + strlen(field_name) + 1;
}
+ /* Validate bytecode */
+ ret = lttng_filter_validate_bytecode(runtime);
+ if (ret) {
+ goto link_error;
+ }
+ /* Specialize bytecode */
+ ret = lttng_filter_specialize_bytecode(runtime);
+ if (ret) {
+ goto link_error;
+ }
event->filter_data = runtime;
event->filter = lttng_filter_interpret_bytecode;
return 0;
projects / lttng-ust.git / blobdiff