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_DOUBLE,
- REG_STRING,
- } type;
+ enum reg_type type;
int64_t v;
double d;
[ 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",
+
+ /* cast */
+ [ FILTER_OP_CAST_TO_S64 ] = "CAST_TO_S64",
+ [ FILTER_OP_CAST_DOUBLE_TO_S64 ] = "CAST_DOUBLE_TO_S64",
+ [ FILTER_OP_CAST_NOP ] = "CAST_NOP",
};
static
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
+
static
int lttng_filter_interpret_bytecode(void *filter_data,
const char *filter_stack_data)
int ret = -EINVAL;
int retval = 0;
struct reg reg[NR_REG];
- int i;
+#ifndef INTERPRETER_USE_SWITCH
+ static void *dispatch[NR_FILTER_OPS] = {
+ [ FILTER_OP_UNKNOWN ] = &&LABEL_FILTER_OP_UNKNOWN,
- for (i = 0; i < NR_REG; i++) {
- reg[i].type = REG_S64;
- reg[i].v = 0;
- reg[i].d = 0.0;
- reg[i].str = NULL;
- reg[i].seq_len = 0;
- reg[i].literal = 0;
- }
+ [ FILTER_OP_RETURN ] = &&LABEL_FILTER_OP_RETURN,
- 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("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:
+ /* 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,
+
+ /* 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 */
+ [ 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,
+
+ [ 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,
+ };
+#endif /* #ifndef INTERPRETER_USE_SWITCH */
+
+ START_OP
+
+ OP(FILTER_OP_UNKNOWN):
+ OP(FILTER_OP_LOAD_FIELD_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;
- case FILTER_OP_RETURN:
+ OP(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:
+ 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;
- case FILTER_OP_EQ:
+ 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):
+ {
+ reg[REG_R0].v = (reg_strcmp(reg, "==") == 0);
+ reg[REG_R0].type = REG_S64;
+ next_pc += sizeof(struct binary_op);
+ PO;
+ }
+ OP(FILTER_OP_NE_STRING):
+ {
+ reg[REG_R0].v = (reg_strcmp(reg, "!=") != 0);
+ reg[REG_R0].type = REG_S64;
+ next_pc += sizeof(struct binary_op);
+ PO;
+ }
+ OP(FILTER_OP_GT_STRING):
+ {
+ reg[REG_R0].v = (reg_strcmp(reg, ">") > 0);
+ reg[REG_R0].type = REG_S64;
+ next_pc += sizeof(struct binary_op);
+ PO;
+ }
+ OP(FILTER_OP_LT_STRING):
+ {
+ reg[REG_R0].v = (reg_strcmp(reg, "<") < 0);
+ reg[REG_R0].type = REG_S64;
+ next_pc += sizeof(struct binary_op);
+ PO;
+ }
+ OP(FILTER_OP_GE_STRING):
+ {
+ reg[REG_R0].v = (reg_strcmp(reg, ">=") >= 0);
+ reg[REG_R0].type = REG_S64;
+ next_pc += sizeof(struct binary_op);
+ PO;
+ }
+ OP(FILTER_OP_LE_STRING):
+ {
+ reg[REG_R0].v = (reg_strcmp(reg, "<=") <= 0);
+ reg[REG_R0].type = REG_S64;
+ next_pc += sizeof(struct binary_op);
+ PO;
+ }
+
+ OP(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);
+ PO;
+ }
+ OP(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);
+ PO;
+ }
+ OP(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);
+ PO;
+ }
+ OP(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);
+ PO;
+ }
+ OP(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);
+ PO;
+ }
+ OP(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);
+ PO;
+ }
+
+ OP(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);
+ PO;
+ }
+ OP(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);
+ PO;
+ }
+ OP(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);
+ PO;
+ }
+ OP(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);
+ PO;
+ }
+ OP(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);
+ PO;
+ }
+ OP(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);
+ 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):
+ {
+ struct unary_op *insn = (struct unary_op *) pc;
+
+ reg[insn->reg].v = -reg[insn->reg].v;
+ next_pc += sizeof(struct unary_op);
+ PO;
+ }
+ OP(FILTER_OP_UNARY_MINUS_DOUBLE):
+ {
+ struct unary_op *insn = (struct unary_op *) pc;
+
+ reg[insn->reg].d = -reg[insn->reg].d;
+ next_pc += sizeof(struct unary_op);
+ PO;
+ }
+ OP(FILTER_OP_UNARY_NOT_S64):
+ {
+ struct unary_op *insn = (struct unary_op *) pc;
+
+ reg[insn->reg].v = !reg[insn->reg].v;
+ next_pc += sizeof(struct unary_op);
+ PO;
+ }
+ OP(FILTER_OP_UNARY_NOT_DOUBLE):
+ {
+ struct unary_op *insn = (struct unary_op *) pc;
+
+ reg[insn->reg].d = !reg[insn->reg].d;
+ next_pc += sizeof(struct unary_op);
+ PO;
+ }
+
+ /* logical */
+ OP(FILTER_OP_AND):
+ {
+ struct logical_op *insn = (struct logical_op *) pc;
+
+ /* If REG_R0 is 0, skip and evaluate to 0 */
+ if (unlikely(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;
+ } else {
+ next_pc += sizeof(struct logical_op);
+ }
+ PO;
+ }
+ OP(FILTER_OP_OR):
+ {
+ struct logical_op *insn = (struct logical_op *) pc;
+
+ /* If REG_R0 is nonzero, skip and evaluate to 1 */
+
+ if (unlikely(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;
+ } else {
+ next_pc += sizeof(struct logical_op);
+ }
+ PO;
+ }
+
+
+ /* load */
+ OP(FILTER_OP_LOAD_FIELD_REF_STRING):
{
- if (unlikely((reg[REG_R0].type == REG_STRING && reg[REG_R1].type != REG_STRING)
- || (reg[REG_R0].type != REG_STRING && reg[REG_R1].type == REG_STRING))) {
- ERR("type mismatch for '==' binary operator\n");
+ 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];
+ if (unlikely(!reg[insn->reg].str)) {
+ dbg_printf("Filter warning: loading a NULL string.\n");
ret = -EINVAL;
goto end;
}
- switch (reg[REG_R0].type) {
- default:
- ERR("unknown register type\n");
+ 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);
+ 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);
+ 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)]);
+ if (unlikely(!reg[insn->reg].str)) {
+ dbg_printf("Filter warning: loading a NULL sequence.\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);
+ PO;
+ }
- case REG_STRING:
- reg[REG_R0].v = (reg_strcmp(reg, "==") == 0);
- break;
- case REG_S64:
- switch (reg[REG_R1].type) {
- default:
- ERR("unknown register type\n");
- ret = -EINVAL;
- goto end;
+ OP(FILTER_OP_LOAD_FIELD_REF_S64):
+ {
+ struct load_op *insn = (struct load_op *) pc;
+ struct field_ref *ref = (struct field_ref *) insn->data;
- case REG_S64:
- reg[REG_R0].v = (reg[REG_R0].v == reg[REG_R1].v);
- break;
- case REG_DOUBLE:
- reg[REG_R0].v = (reg[REG_R0].v == reg[REG_R1].d);
- break;
- }
+ 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;
+ dbg_printf("ref load s64 %" PRIi64 "\n", reg[insn->reg].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);
+ memcpy(®[insn->reg].d, &filter_stack_data[ref->offset],
+ sizeof(struct literal_double));
+ reg[insn->reg].type = REG_DOUBLE;
+ dbg_printf("ref load double %g\n", reg[insn->reg].d);
+ next_pc += sizeof(struct load_op) + sizeof(struct field_ref);
+ PO;
+ }
+
+ OP(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;
+ PO;
+ }
+
+ OP(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;
+ next_pc += sizeof(struct load_op)
+ + sizeof(struct literal_numeric);
+ PO;
+ }
+
+ OP(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;
+ 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):
+ {
+ struct cast_op *insn = (struct cast_op *) pc;
+
+ reg[insn->reg].v = (int64_t) reg[insn->reg].d;
+ reg[insn->reg].type = REG_S64;
+ next_pc += sizeof(struct cast_op);
+ PO;
+ }
+
+ OP(FILTER_OP_CAST_NOP):
+ {
+ next_pc += sizeof(struct cast_op);
+ 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
+
+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;
+}
+
+/*
+ * Validate bytecode range overflow within the validation pass.
+ * Called for each instruction encountered.
+ */
+static
+int bytecode_validate_overflow(struct bytecode_runtime *bytecode,
+ void *start_pc, void *pc)
+{
+ int ret = 0;
+
+ switch (*(filter_opcode_t *) pc) {
+ case FILTER_OP_UNKNOWN:
+ default:
+ {
+ ERR("unknown bytecode op %u\n",
+ (unsigned int) *(filter_opcode_t *) pc);
+ ret = -EINVAL;
+ break;
+ }
+
+ case FILTER_OP_RETURN:
+ {
+ if (unlikely(pc + sizeof(struct return_op)
+ > start_pc + bytecode->len)) {
+ ret = -EINVAL;
+ }
+ break;
+ }
+
+ /* 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;
+ break;
+ }
+
+ case FILTER_OP_EQ:
+ case FILTER_OP_NE:
+ case FILTER_OP_GT:
+ case FILTER_OP_LT:
+ case FILTER_OP_GE:
+ case FILTER_OP_LE:
+ 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:
+ {
+ if (unlikely(pc + sizeof(struct binary_op)
+ > start_pc + bytecode->len)) {
+ ret = -EINVAL;
+ }
+ break;
+ }
+
+ /* unary */
+ case FILTER_OP_UNARY_PLUS:
+ case FILTER_OP_UNARY_MINUS:
+ case FILTER_OP_UNARY_NOT:
+ 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:
+ {
+ if (unlikely(pc + sizeof(struct unary_op)
+ > start_pc + bytecode->len)) {
+ ret = -EINVAL;
+ }
+ break;
+ }
+
+ /* logical */
+ case FILTER_OP_AND:
+ case FILTER_OP_OR:
+ {
+ if (unlikely(pc + sizeof(struct logical_op)
+ > start_pc + bytecode->len)) {
+ ret = -EINVAL;
+ }
+ break;
+ }
+
+ /* load */
+ case FILTER_OP_LOAD_FIELD_REF:
+ {
+ ERR("Unknown field ref type\n");
+ ret = -EINVAL;
+ break;
+ }
+ case FILTER_OP_LOAD_FIELD_REF_STRING:
+ case FILTER_OP_LOAD_FIELD_REF_SEQUENCE:
+ case FILTER_OP_LOAD_FIELD_REF_S64:
+ case FILTER_OP_LOAD_FIELD_REF_DOUBLE:
+ {
+ if (unlikely(pc + sizeof(struct load_op) + sizeof(struct field_ref)
+ > start_pc + bytecode->len)) {
+ ret = -EINVAL;
+ }
+ break;
+ }
+
+ case FILTER_OP_LOAD_STRING:
+ {
+ struct load_op *insn = (struct load_op *) pc;
+ uint32_t str_len, maxlen;
+
+ if (unlikely(pc + sizeof(struct load_op)
+ > start_pc + bytecode->len)) {
+ ret = -EINVAL;
+ break;
+ }
+
+ maxlen = start_pc + bytecode->len - pc - sizeof(struct load_op);
+ str_len = strnlen(insn->data, maxlen);
+ if (unlikely(str_len >= maxlen)) {
+ /* Final '\0' not found within range */
+ ret = -EINVAL;
+ }
+ break;
+ }
+
+ case FILTER_OP_LOAD_S64:
+ {
+ if (unlikely(pc + sizeof(struct load_op) + sizeof(struct literal_numeric)
+ > start_pc + bytecode->len)) {
+ ret = -EINVAL;
+ }
+ break;
+ }
+
+ case FILTER_OP_LOAD_DOUBLE:
+ {
+ if (unlikely(pc + sizeof(struct load_op) + sizeof(struct literal_double)
+ > start_pc + bytecode->len)) {
+ ret = -EINVAL;
+ }
+ break;
+ }
+
+ case FILTER_OP_CAST_TO_S64:
+ case FILTER_OP_CAST_DOUBLE_TO_S64:
+ case FILTER_OP_CAST_NOP:
+ {
+ if (unlikely(pc + sizeof(struct cast_op)
+ > start_pc + bytecode->len)) {
+ ret = -EINVAL;
+ }
+ break;
+ }
+ }
+
+ return ret;
+}
+
+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 (bytecode_validate_overflow(bytecode, start_pc, pc) != 0) {
+ 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;
+ }
+ if (reg[REG_R0].type != REG_DOUBLE && reg[REG_R1].type != REG_DOUBLE) {
+ ERR("Double operator should have at least one double register\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 (reg[REG_R0].type != REG_S64) {
+ ERR("Logical comparator expects S64 register\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;
+ }
+ 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;
+
+ if (unlikely(insn->reg >= REG_ERROR)) {
+ ERR("invalid register %u\n",
+ (unsigned int) insn->reg);
+ ret = -EINVAL;
+ goto end;
+ }
+ reg[insn->reg].type = REG_DOUBLE;
+ reg[insn->reg].literal = 1;
+ next_pc += sizeof(struct load_op)
+ + sizeof(struct literal_double);
+ break;
+ }
+
+ case FILTER_OP_CAST_TO_S64:
+ case FILTER_OP_CAST_DOUBLE_TO_S64:
+ {
+ struct cast_op *insn = (struct cast_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("Cast op can only be applied to numeric or floating point registers\n");
+ ret = -EINVAL;
+ goto end;
+ case REG_S64:
+ break;
+ case REG_DOUBLE:
+ break;
+ }
+ if (insn->op == FILTER_OP_CAST_DOUBLE_TO_S64) {
+ if (reg[insn->reg].type != REG_DOUBLE) {
+ ERR("Cast expects double\n");
+ ret = -EINVAL;
+ goto end;
+ }
+ }
+ reg[insn->reg].type = REG_S64;
+ next_pc += sizeof(struct cast_op);
+ break;
+ }
+ case FILTER_OP_CAST_NOP:
+ {
+ next_pc += sizeof(struct cast_op);
+ break;
+ }
+
+ }
+ }
+end:
+ return ret;
+}
+
+static
+int lttng_filter_specialize_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) {
+ 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:
+ {
+ struct binary_op *insn = (struct binary_op *) pc;
+
+ switch(reg[REG_R0].type) {
+ default:
+ ERR("unknown register type\n");
+ ret = -EINVAL;
+ goto end;
+
+ case REG_STRING:
+ insn->op = FILTER_OP_EQ_STRING;
+ break;
+ case REG_S64:
+ if (reg[REG_R1].type == REG_S64)
+ insn->op = FILTER_OP_EQ_S64;
+ else
+ insn->op = FILTER_OP_EQ_DOUBLE;
break;
case REG_DOUBLE:
- switch (reg[REG_R1].type) {
- default:
- ERR("unknown register type\n");
- ret = -EINVAL;
- goto end;
-
- case REG_S64:
- reg[REG_R0].v = (reg[REG_R0].d == reg[REG_R1].v);
- break;
- case REG_DOUBLE:
- reg[REG_R0].v = (reg[REG_R0].d == reg[REG_R1].d);
- break;
- }
+ 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_STRING && reg[REG_R1].type != REG_STRING)
- || (reg[REG_R0].type != REG_STRING && reg[REG_R1].type == REG_STRING))) {
- ERR("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:
ERR("unknown register type\n");
ret = -EINVAL;
goto end;
case REG_STRING:
- reg[REG_R0].v = (reg_strcmp(reg, "!=") != 0);
+ insn->op = FILTER_OP_NE_STRING;
break;
case REG_S64:
- switch (reg[REG_R1].type) {
- default:
- ERR("unknown register type\n");
- ret = -EINVAL;
- goto end;
-
- case REG_S64:
- reg[REG_R0].v = (reg[REG_R0].v != reg[REG_R1].v);
- break;
- case REG_DOUBLE:
- reg[REG_R0].v = (reg[REG_R0].v != reg[REG_R1].d);
- break;
- }
+ if (reg[REG_R1].type == REG_S64)
+ insn->op = FILTER_OP_NE_S64;
+ else
+ insn->op = FILTER_OP_NE_DOUBLE;
break;
case REG_DOUBLE:
- switch (reg[REG_R1].type) {
- default:
- ERR("unknown register type\n");
- ret = -EINVAL;
- goto end;
-
- case REG_S64:
- reg[REG_R0].v = (reg[REG_R0].d != reg[REG_R1].v);
- break;
- case REG_DOUBLE:
- reg[REG_R0].v = (reg[REG_R0].d != reg[REG_R1].d);
- break;
- }
+ 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_STRING && reg[REG_R1].type != REG_STRING)
- || (reg[REG_R0].type != REG_STRING && reg[REG_R1].type == REG_STRING))) {
- ERR("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:
ERR("unknown register type\n");
ret = -EINVAL;
goto end;
case REG_STRING:
- reg[REG_R0].v = (reg_strcmp(reg, ">") > 0);
+ insn->op = FILTER_OP_GT_STRING;
break;
case REG_S64:
- switch (reg[REG_R1].type) {
- default:
- ERR("unknown register type\n");
- ret = -EINVAL;
- goto end;
-
- case REG_S64:
- reg[REG_R0].v = (reg[REG_R0].v > reg[REG_R1].v);
- break;
- case REG_DOUBLE:
- reg[REG_R0].v = (reg[REG_R0].v > reg[REG_R1].d);
- break;
- }
+ if (reg[REG_R1].type == REG_S64)
+ insn->op = FILTER_OP_GT_S64;
+ else
+ insn->op = FILTER_OP_GT_DOUBLE;
break;
case REG_DOUBLE:
- switch (reg[REG_R1].type) {
- default:
- ERR("unknown register type\n");
- ret = -EINVAL;
- goto end;
-
- case REG_S64:
- reg[REG_R0].v = (reg[REG_R0].d > reg[REG_R1].v);
- break;
- case REG_DOUBLE:
- reg[REG_R0].v = (reg[REG_R0].d > reg[REG_R1].d);
- break;
- }
+ 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_STRING && reg[REG_R1].type != REG_STRING)
- || (reg[REG_R0].type != REG_STRING && reg[REG_R1].type == REG_STRING))) {
- ERR("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:
ERR("unknown register type\n");
ret = -EINVAL;
goto end;
case REG_STRING:
- reg[REG_R0].v = (reg_strcmp(reg, "<") < 0);
+ insn->op = FILTER_OP_LT_STRING;
break;
case REG_S64:
- switch (reg[REG_R1].type) {
- default:
- ERR("unknown register type\n");
- ret = -EINVAL;
- goto end;
-
- case REG_S64:
- reg[REG_R0].v = (reg[REG_R0].v < reg[REG_R1].v);
- break;
- case REG_DOUBLE:
- reg[REG_R0].v = (reg[REG_R0].v < reg[REG_R1].d);
- break;
- }
+ if (reg[REG_R1].type == REG_S64)
+ insn->op = FILTER_OP_LT_S64;
+ else
+ insn->op = FILTER_OP_LT_DOUBLE;
break;
case REG_DOUBLE:
- switch (reg[REG_R1].type) {
- default:
- ERR("unknown register type\n");
- ret = -EINVAL;
- goto end;
-
- case REG_S64:
- reg[REG_R0].v = (reg[REG_R0].d < reg[REG_R1].v);
- break;
- case REG_DOUBLE:
- reg[REG_R0].v = (reg[REG_R0].d < reg[REG_R1].d);
- break;
- }
+ 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_STRING && reg[REG_R1].type != REG_STRING)
- || (reg[REG_R0].type != REG_STRING && reg[REG_R1].type == REG_STRING))) {
- ERR("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:
ERR("unknown register type\n");
ret = -EINVAL;
goto end;
case REG_STRING:
- reg[REG_R0].v = (reg_strcmp(reg, ">=") >= 0);
+ insn->op = FILTER_OP_GE_STRING;
break;
case REG_S64:
- switch (reg[REG_R1].type) {
- default:
- ERR("unknown register type\n");
- ret = -EINVAL;
- goto end;
-
- case REG_S64:
- reg[REG_R0].v = (reg[REG_R0].v >= reg[REG_R1].v);
- break;
- case REG_DOUBLE:
- reg[REG_R0].v = (reg[REG_R0].v >= reg[REG_R1].d);
- break;
- }
+ if (reg[REG_R1].type == REG_S64)
+ insn->op = FILTER_OP_GE_S64;
+ else
+ insn->op = FILTER_OP_GE_DOUBLE;
break;
case REG_DOUBLE:
- switch (reg[REG_R1].type) {
- default:
- ERR("unknown register type\n");
- ret = -EINVAL;
- goto end;
-
- case REG_S64:
- reg[REG_R0].v = (reg[REG_R0].d >= reg[REG_R1].v);
- break;
- case REG_DOUBLE:
- reg[REG_R0].v = (reg[REG_R0].d >= reg[REG_R1].d);
- break;
- }
+ insn->op = FILTER_OP_GE_DOUBLE;
break;
}
reg[REG_R0].type = REG_S64;
}
case FILTER_OP_LE:
{
- if (unlikely((reg[REG_R0].type == REG_STRING && reg[REG_R1].type != REG_STRING)
- || (reg[REG_R0].type != REG_STRING && reg[REG_R1].type == REG_STRING))) {
- ERR("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:
ERR("unknown register type\n");
ret = -EINVAL;
goto end;
case REG_STRING:
- reg[REG_R0].v = (reg_strcmp(reg, "<=") <= 0);
+ insn->op = FILTER_OP_LE_STRING;
break;
case REG_S64:
- switch (reg[REG_R1].type) {
- default:
- ERR("unknown register type\n");
- ret = -EINVAL;
- goto end;
-
- case REG_S64:
- reg[REG_R0].v = (reg[REG_R0].v <= reg[REG_R1].v);
- break;
- case REG_DOUBLE:
- reg[REG_R0].v = (reg[REG_R0].v <= reg[REG_R1].d);
- break;
- }
+ if (reg[REG_R1].type == REG_S64)
+ insn->op = FILTER_OP_LE_S64;
+ else
+ insn->op = FILTER_OP_LE_DOUBLE;
break;
case REG_DOUBLE:
- switch (reg[REG_R1].type) {
- default:
- ERR("unknown register type\n");
- ret = -EINVAL;
- goto end;
-
- case REG_S64:
- reg[REG_R0].v = (reg[REG_R0].d <= reg[REG_R1].v);
- break;
- case REG_DOUBLE:
- reg[REG_R0].v = (reg[REG_R0].d <= reg[REG_R1].d);
- break;
- }
+ 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)) {
- ERR("invalid register %u\n",
- (unsigned int) insn->reg);
- ret = -EINVAL;
- goto end;
- }
- switch (reg[insn->reg].type) {
+ switch(reg[insn->reg].type) {
default:
ERR("unknown register type\n");
ret = -EINVAL;
goto end;
- case REG_STRING:
- ERR("Unary plus can only be applied to numeric or floating point registers\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)) {
- ERR("invalid register %u\n",
- (unsigned int) insn->reg);
- ret = -EINVAL;
- goto end;
- }
- switch (reg[insn->reg].type) {
+ 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;
+ insn->op = FILTER_OP_UNARY_MINUS_S64;
break;
case REG_DOUBLE:
- reg[insn->reg].d = -reg[insn->reg].d;
+ insn->op = FILTER_OP_UNARY_MINUS_DOUBLE;
break;
}
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)) {
- ERR("invalid register %u\n",
- (unsigned int) insn->reg);
- ret = -EINVAL;
- goto end;
- }
- switch (reg[insn->reg].type) {
+ 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;
+ insn->op = FILTER_OP_UNARY_NOT_S64;
break;
case REG_DOUBLE:
- reg[insn->reg].d = !reg[insn->reg].d;
+ insn->op = FILTER_OP_UNARY_NOT_DOUBLE;
break;
}
- if (unlikely(reg[insn->reg].type != REG_S64)) {
- ERR("Unary not can only be applied to numeric register\n");
- ret = -EINVAL;
- goto end;
- }
- 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_STRING)) {
- ERR("Logical operator 'and' can only be applied to numeric and floating point registers\n");
- ret = -EINVAL;
- goto end;
- }
- /* 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;
- if (unlikely(next_pc <= pc)) {
- ERR("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_STRING)) {
- ERR("Logical operator 'or' can only be applied to numeric and floating point registers\n");
- ret = -EINVAL;
- goto end;
- }
-
- /* 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;
- if (unlikely(next_pc <= pc)) {
- ERR("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)) {
- ERR("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:
- ERR("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_STRING;
- 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;
- case FIELD_REF_DOUBLE:
- 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);
- 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)) {
- ERR("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)) {
- ERR("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;
{
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;
- }
- 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;
}
+
+ /* cast */
+ case FILTER_OP_CAST_TO_S64:
+ {
+ struct cast_op *insn = (struct cast_op *) pc;
+
+ switch (reg[insn->reg].type) {
+ default:
+ ERR("unknown register type\n");
+ ret = -EINVAL;
+ goto end;
+
+ case REG_STRING:
+ ERR("Cast op can only be applied to numeric or floating point registers\n");
+ ret = -EINVAL;
+ goto end;
+ case REG_S64:
+ insn->op = FILTER_OP_CAST_NOP;
+ break;
+ case REG_DOUBLE:
+ insn->op = FILTER_OP_CAST_DOUBLE_TO_S64;
+ break;
+ }
+ reg[insn->reg].type = REG_S64;
+ next_pc += sizeof(struct cast_op);
+ break;
+ }
+ case FILTER_OP_CAST_DOUBLE_TO_S64:
+ {
+ struct cast_op *insn = (struct cast_op *) pc;
+
+ reg[insn->reg].type = REG_S64;
+ next_pc += sizeof(struct cast_op);
+ break;
+ }
+ case FILTER_OP_CAST_NOP:
+ {
+ next_pc += sizeof(struct cast_op);
+ break;
+ }
+
+
}
}
end:
- /* return 0 (discard) on error */
- if (ret)
- return 0;
- return retval;
+ return ret;
}
static
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);
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:
- field_ref->type = FIELD_REF_DOUBLE;
+ 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