for (;;) {
int escaped_r0 = 0;
- if (unlikely(p - estack_bx(stack, top)->u.s.str > estack_bx(stack, top)->u.s.seq_len || *p == '\0')) {
- if (q - estack_ax(stack, top)->u.s.str > estack_ax(stack, top)->u.s.seq_len || *q == '\0')
- diff = 0;
- else
- diff = -1;
- break;
+ if (unlikely(p - estack_bx(stack, top)->u.s.str >= estack_bx(stack, top)->u.s.seq_len || *p == '\0')) {
+ if (q - estack_ax(stack, top)->u.s.str >= estack_ax(stack, top)->u.s.seq_len || *q == '\0') {
+ return 0;
+ } else {
+ if (estack_ax(stack, top)->u.s.literal) {
+ ret = parse_char(&q);
+ if (ret == -1)
+ return 0;
+ }
+ return -1;
+ }
}
- if (unlikely(q - estack_ax(stack, top)->u.s.str > estack_ax(stack, top)->u.s.seq_len || *q == '\0')) {
- if (p - estack_bx(stack, top)->u.s.str > estack_bx(stack, top)->u.s.seq_len || *p == '\0')
- diff = 0;
- else
- diff = 1;
- break;
+ if (unlikely(q - estack_ax(stack, top)->u.s.str >= estack_ax(stack, top)->u.s.seq_len || *q == '\0')) {
+ if (p - estack_bx(stack, top)->u.s.str >= estack_bx(stack, top)->u.s.seq_len || *p == '\0') {
+ return 0;
+ } else {
+ if (estack_bx(stack, top)->u.s.literal) {
+ ret = parse_char(&p);
+ if (ret == -1)
+ return 0;
+ }
+ return 1;
+ }
}
if (estack_bx(stack, top)->u.s.literal) {
ret = parse_char(&p);
struct bytecode_runtime *bytecode = filter_data;
void *pc, *next_pc, *start_pc;
int ret = -EINVAL;
- int retval = 0;
+ uint64_t retval = 0;
struct estack _stack;
struct estack *stack = &_stack;
register int64_t ax = 0, bx = 0;
[ FILTER_OP_AND ] = &&LABEL_FILTER_OP_AND,
[ FILTER_OP_OR ] = &&LABEL_FILTER_OP_OR,
- /* load */
+ /* load field ref */
[ FILTER_OP_LOAD_FIELD_REF ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF,
[ FILTER_OP_LOAD_FIELD_REF_STRING ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_STRING,
[ FILTER_OP_LOAD_FIELD_REF_SEQUENCE ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_SEQUENCE,
[ FILTER_OP_LOAD_FIELD_REF_S64 ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_S64,
[ FILTER_OP_LOAD_FIELD_REF_DOUBLE ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_DOUBLE,
+ /* load from immediate operand */
[ FILTER_OP_LOAD_STRING ] = &&LABEL_FILTER_OP_LOAD_STRING,
[ FILTER_OP_LOAD_S64 ] = &&LABEL_FILTER_OP_LOAD_S64,
[ FILTER_OP_LOAD_DOUBLE ] = &&LABEL_FILTER_OP_LOAD_DOUBLE,
[ FILTER_OP_CAST_TO_S64 ] = &&LABEL_FILTER_OP_CAST_TO_S64,
[ FILTER_OP_CAST_DOUBLE_TO_S64 ] = &&LABEL_FILTER_OP_CAST_DOUBLE_TO_S64,
[ FILTER_OP_CAST_NOP ] = &&LABEL_FILTER_OP_CAST_NOP,
+
+ /* get context ref */
+ [ FILTER_OP_GET_CONTEXT_REF ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF,
+ [ FILTER_OP_GET_CONTEXT_REF_STRING ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF_STRING,
+ [ FILTER_OP_GET_CONTEXT_REF_S64 ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF_S64,
+ [ FILTER_OP_GET_CONTEXT_REF_DOUBLE ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF_DOUBLE,
};
#endif /* #ifndef INTERPRETER_USE_SWITCH */
OP(FILTER_OP_UNKNOWN):
OP(FILTER_OP_LOAD_FIELD_REF):
+ OP(FILTER_OP_GET_CONTEXT_REF):
#ifdef INTERPRETER_USE_SWITCH
default:
#endif /* INTERPRETER_USE_SWITCH */
}
- /* load */
+ /* load field ref */
OP(FILTER_OP_LOAD_FIELD_REF_STRING):
{
struct load_op *insn = (struct load_op *) pc;
PO;
}
+ /* load from immediate operand */
OP(FILTER_OP_LOAD_STRING):
{
struct load_op *insn = (struct load_op *) pc;
PO;
}
+ /* get context ref */
+ OP(FILTER_OP_GET_CONTEXT_REF_STRING):
+ {
+ struct load_op *insn = (struct load_op *) pc;
+ struct field_ref *ref = (struct field_ref *) insn->data;
+ struct lttng_ctx_field *ctx_field;
+ union lttng_ctx_value v;
+
+ dbg_printf("get context ref offset %u type string\n",
+ ref->offset);
+ ctx_field = <tng_static_ctx->fields[ref->offset];
+ ctx_field->get_value(ctx_field, &v);
+ estack_push(stack, top, ax, bx);
+ estack_ax(stack, top)->u.s.str = v.str;
+ if (unlikely(!estack_ax(stack, top)->u.s.str)) {
+ dbg_printf("Filter warning: loading a NULL string.\n");
+ ret = -EINVAL;
+ goto end;
+ }
+ estack_ax(stack, top)->u.s.seq_len = UINT_MAX;
+ estack_ax(stack, top)->u.s.literal = 0;
+ dbg_printf("ref get context string %s\n", estack_ax(stack, top)->u.s.str);
+ next_pc += sizeof(struct load_op) + sizeof(struct field_ref);
+ PO;
+ }
+
+ OP(FILTER_OP_GET_CONTEXT_REF_S64):
+ {
+ struct load_op *insn = (struct load_op *) pc;
+ struct field_ref *ref = (struct field_ref *) insn->data;
+ struct lttng_ctx_field *ctx_field;
+ union lttng_ctx_value v;
+
+ dbg_printf("get context ref offset %u type s64\n",
+ ref->offset);
+ ctx_field = <tng_static_ctx->fields[ref->offset];
+ ctx_field->get_value(ctx_field, &v);
+ estack_push(stack, top, ax, bx);
+ estack_ax_v = v.s64;
+ dbg_printf("ref get context s64 %" PRIi64 "\n", estack_ax_v);
+ next_pc += sizeof(struct load_op) + sizeof(struct field_ref);
+ PO;
+ }
+
+ OP(FILTER_OP_GET_CONTEXT_REF_DOUBLE):
+ {
+ struct load_op *insn = (struct load_op *) pc;
+ struct field_ref *ref = (struct field_ref *) insn->data;
+ struct lttng_ctx_field *ctx_field;
+ union lttng_ctx_value v;
+
+ dbg_printf("get context ref offset %u type double\n",
+ ref->offset);
+ ctx_field = <tng_static_ctx->fields[ref->offset];
+ ctx_field->get_value(ctx_field, &v);
+ estack_push(stack, top, ax, bx);
+ memcpy(&estack_ax(stack, top)->u.d, &v.d, sizeof(struct literal_double));
+ dbg_printf("ref get context double %g\n", estack_ax(stack, top)->u.d);
+ next_pc += sizeof(struct load_op) + sizeof(struct field_ref);
+ PO;
+ }
+
END_OP
end:
/* return 0 (discard) on error */