[ 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;
}
-#define INTERPRETER_USE_SWITCH
-
#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; \
#else
-#define OP(name)
+/*
+ * 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
struct reg reg[NR_REG];
#ifndef INTERPRETER_USE_SWITCH
static void *dispatch[NR_FILTER_OPS] = {
- [ FILTER_OP_UNKNOWN ] = &&LABEL_FILTER_OP_UNKNOWN = 0,
+ [ FILTER_OP_UNKNOWN ] = &&LABEL_FILTER_OP_UNKNOWN,
[ FILTER_OP_RETURN ] = &&LABEL_FILTER_OP_RETURN,
[ 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 */
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)
- || unlikely(reg[REG_R0].type == REG_DOUBLE && reg[REG_R0].d == 0.0)) {
+ 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;
/* If REG_R0 is nonzero, skip and evaluate to 1 */
- if ((reg[REG_R0].type == REG_S64 && reg[REG_R0].v != 0)
- || unlikely(reg[REG_R0].type == REG_DOUBLE && reg[REG_R0].d != 0.0)) {
+ 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);
PO;
}
+
/* load */
OP(FILTER_OP_LOAD_FIELD_REF_STRING):
{
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);
PO;
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);
PO;
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);
PO;
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);
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 */
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)
{
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;
{
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");
+ if (reg[REG_R0].type != REG_S64) {
+ ERR("Logical comparator expects S64 register\n");
ret = -EINVAL;
goto end;
}
+ 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:
insn->op = FILTER_OP_UNARY_PLUS_DOUBLE;
break;
}
+ next_pc += sizeof(struct unary_op);
break;
}
insn->op = FILTER_OP_UNARY_MINUS_DOUBLE;
break;
}
+ next_pc += sizeof(struct unary_op);
break;
}
insn->op = FILTER_OP_UNARY_NOT_DOUBLE;
break;
}
+ next_pc += sizeof(struct unary_op);
break;
}
+ 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 ret;
}
-
-
static
int apply_field_reloc(struct ltt_event *event,
struct bytecode_runtime *runtime,
projects / lttng-ust.git / blobdiff