#include <lttng/filter.h>
#include <lttng/string-utils.h>
-LTTNG_STACK_FRAME_NON_STANDARD(lttng_filter_interpret_bytecode);
-
/*
* get_char should be called with page fault handler disabled if it is expected
* to handle user-space read.
return diff;
}
-uint64_t lttng_filter_false(void *filter_data,
+uint64_t lttng_filter_interpret_bytecode_false(void *filter_data,
struct lttng_probe_ctx *lttng_probe_ctx,
const char *filter_stack_data)
{
int ret;
const struct filter_get_index_data *gid;
- /*
- * Types nested within variants need to perform dynamic lookup
- * based on the field descriptions. LTTng-UST does not implement
- * variants for now.
- */
- if (stack_top->u.ptr.field)
- return -EINVAL;
gid = (const struct filter_get_index_data *) &runtime->data[index];
switch (stack_top->u.ptr.type) {
case LOAD_OBJECT:
stack_top->u.ptr.ptr = ptr;
stack_top->u.ptr.object_type = gid->elem.type;
stack_top->u.ptr.rev_bo = gid->elem.rev_bo;
- /* field is only used for types nested within variants. */
+ BUG_ON(stack_top->u.ptr.field->type.atype != atype_array_nestable);
stack_top->u.ptr.field = NULL;
break;
}
stack_top->u.ptr.ptr = ptr;
stack_top->u.ptr.object_type = gid->elem.type;
stack_top->u.ptr.rev_bo = gid->elem.rev_bo;
- /* field is only used for types nested within variants. */
+ BUG_ON(stack_top->u.ptr.field->type.atype != atype_sequence_nestable);
stack_top->u.ptr.field = NULL;
break;
}
stack_top->u.ptr.ptr = *(const char * const *) stack_top->u.ptr.ptr;
stack_top->u.ptr.object_type = gid->elem.type;
stack_top->u.ptr.type = LOAD_OBJECT;
- /* field is only used for types nested within variants. */
- stack_top->u.ptr.field = NULL;
+ stack_top->u.ptr.field = gid->field;
break;
}
+
+ stack_top->type = REG_PTR;
+
return 0;
end:
return ret;
}
+static
+int lttng_bytecode_interpret_format_output(struct estack_entry *ax,
+ struct lttng_interpreter_output *output)
+{
+ int ret;
+
+again:
+ switch (ax->type) {
+ case REG_S64:
+ output->type = LTTNG_INTERPRETER_TYPE_S64;
+ output->u.s = ax->u.v;
+ break;
+ case REG_U64:
+ output->type = LTTNG_INTERPRETER_TYPE_U64;
+ output->u.u = (uint64_t) ax->u.v;
+ break;
+ case REG_STRING:
+ output->type = LTTNG_INTERPRETER_TYPE_STRING;
+ output->u.str.str = ax->u.s.str;
+ output->u.str.len = ax->u.s.seq_len;
+ break;
+ case REG_PTR:
+ switch (ax->u.ptr.object_type) {
+ case OBJECT_TYPE_S8:
+ case OBJECT_TYPE_S16:
+ case OBJECT_TYPE_S32:
+ case OBJECT_TYPE_S64:
+ case OBJECT_TYPE_U8:
+ case OBJECT_TYPE_U16:
+ case OBJECT_TYPE_U32:
+ case OBJECT_TYPE_U64:
+ case OBJECT_TYPE_DOUBLE:
+ case OBJECT_TYPE_STRING:
+ case OBJECT_TYPE_STRING_SEQUENCE:
+ ret = dynamic_load_field(ax);
+ if (ret)
+ return ret;
+ /* Retry after loading ptr into stack top. */
+ goto again;
+ case OBJECT_TYPE_SEQUENCE:
+ output->type = LTTNG_INTERPRETER_TYPE_SEQUENCE;
+ output->u.sequence.ptr = *(const char **) (ax->u.ptr.ptr + sizeof(unsigned long));
+ output->u.sequence.nr_elem = *(unsigned long *) ax->u.ptr.ptr;
+ output->u.sequence.nested_type = ax->u.ptr.field->type.u.sequence_nestable.elem_type;
+ break;
+ case OBJECT_TYPE_ARRAY:
+ /* Skip count (unsigned long) */
+ output->type = LTTNG_INTERPRETER_TYPE_SEQUENCE;
+ output->u.sequence.ptr = *(const char **) (ax->u.ptr.ptr + sizeof(unsigned long));
+ output->u.sequence.nr_elem = ax->u.ptr.field->type.u.array_nestable.length;
+ output->u.sequence.nested_type = ax->u.ptr.field->type.u.array_nestable.elem_type;
+ break;
+ case OBJECT_TYPE_STRUCT:
+ case OBJECT_TYPE_VARIANT:
+ default:
+ return -EINVAL;
+ }
+
+ break;
+ case REG_STAR_GLOB_STRING:
+ case REG_TYPE_UNKNOWN:
+ default:
+ return -EINVAL;
+ }
+
+ return LTTNG_FILTER_RECORD_FLAG;
+}
+
/*
* Return 0 (discard), or raise the 0x1 flag (log event).
* Currently, other flags are kept for future extensions and have no
* effect.
*/
-uint64_t lttng_filter_interpret_bytecode(void *filter_data,
+static
+uint64_t bytecode_interpret(void *interpreter_data,
struct lttng_probe_ctx *lttng_probe_ctx,
- const char *filter_stack_data)
+ const char *interpreter_stack_data,
+ struct lttng_interpreter_output *output)
{
- struct bytecode_runtime *bytecode = filter_data;
+ struct bytecode_runtime *bytecode = interpreter_data;
void *pc, *next_pc, *start_pc;
int ret = -EINVAL;
uint64_t retval = 0;
case REG_DOUBLE:
case REG_STRING:
case REG_PTR:
+ if (!output) {
+ ret = -EINVAL;
+ goto end;
+ }
+ retval = 0;
+ break;
case REG_STAR_GLOB_STRING:
case REG_TYPE_UNKNOWN:
ret = -EINVAL;
ref->offset);
estack_push(stack, top, ax, bx, ax_t, bx_t);
estack_ax(stack, top)->u.s.str =
- *(const char * const *) &filter_stack_data[ref->offset];
+ *(const char * const *) &interpreter_stack_data[ref->offset];
if (unlikely(!estack_ax(stack, top)->u.s.str)) {
dbg_printk("Filter warning: loading a NULL string.\n");
ret = -EINVAL;
ref->offset);
estack_push(stack, top, ax, bx, ax_t, bx_t);
estack_ax(stack, top)->u.s.seq_len =
- *(unsigned long *) &filter_stack_data[ref->offset];
+ *(unsigned long *) &interpreter_stack_data[ref->offset];
estack_ax(stack, top)->u.s.str =
- *(const char **) (&filter_stack_data[ref->offset
+ *(const char **) (&interpreter_stack_data[ref->offset
+ sizeof(unsigned long)]);
if (unlikely(!estack_ax(stack, top)->u.s.str)) {
dbg_printk("Filter warning: loading a NULL sequence.\n");
ref->offset);
estack_push(stack, top, ax, bx, ax_t, bx_t);
estack_ax_v =
- ((struct literal_numeric *) &filter_stack_data[ref->offset])->v;
+ ((struct literal_numeric *) &interpreter_stack_data[ref->offset])->v;
estack_ax_t = REG_S64;
dbg_printk("ref load s64 %lld\n",
(long long) estack_ax_v);
ref->offset);
estack_push(stack, top, ax, bx, ax_t, bx_t);
estack_ax(stack, top)->u.s.user_str =
- *(const char * const *) &filter_stack_data[ref->offset];
+ *(const char * const *) &interpreter_stack_data[ref->offset];
if (unlikely(!estack_ax(stack, top)->u.s.str)) {
dbg_printk("Filter warning: loading a NULL string.\n");
ret = -EINVAL;
ref->offset);
estack_push(stack, top, ax, bx, ax_t, bx_t);
estack_ax(stack, top)->u.s.seq_len =
- *(unsigned long *) &filter_stack_data[ref->offset];
+ *(unsigned long *) &interpreter_stack_data[ref->offset];
estack_ax(stack, top)->u.s.user_str =
- *(const char **) (&filter_stack_data[ref->offset
+ *(const char **) (&interpreter_stack_data[ref->offset
+ sizeof(unsigned long)]);
if (unlikely(!estack_ax(stack, top)->u.s.str)) {
dbg_printk("Filter warning: loading a NULL sequence.\n");
dbg_printk("op get app payload root\n");
estack_push(stack, top, ax, bx, ax_t, bx_t);
estack_ax(stack, top)->u.ptr.type = LOAD_ROOT_PAYLOAD;
- estack_ax(stack, top)->u.ptr.ptr = filter_stack_data;
+ estack_ax(stack, top)->u.ptr.ptr = interpreter_stack_data;
/* "field" only needed for variants. */
estack_ax(stack, top)->u.ptr.field = NULL;
estack_ax(stack, top)->type = REG_PTR;
/* Return _DISCARD on error. */
if (ret)
return LTTNG_FILTER_DISCARD;
+
+ if (output) {
+ return lttng_bytecode_interpret_format_output(
+ estack_ax(stack, top), output);
+ }
+
return retval;
}
+LTTNG_STACK_FRAME_NON_STANDARD(bytecode_interpret);
+
+uint64_t lttng_filter_interpret_bytecode(void *filter_data,
+ struct lttng_probe_ctx *lttng_probe_ctx,
+ const char *filter_stack_data)
+{
+ return bytecode_interpret(filter_data, lttng_probe_ctx,
+ filter_stack_data, NULL);
+}
#undef START_OP
#undef OP
projects / lttng-modules.git / blobdiff