}
static
-int apply_field_reloc(struct lttng_event *event,
+int apply_field_reloc(const struct lttng_event_desc *event_desc,
struct bytecode_runtime *runtime,
uint32_t runtime_len,
uint32_t reloc_offset,
const char *field_name,
enum filter_op filter_op)
{
- const struct lttng_event_desc *desc;
const struct lttng_event_field *fields, *field = NULL;
unsigned int nr_fields, i;
struct load_op *op;
dbg_printk("Apply field reloc: %u %s\n", reloc_offset, field_name);
/* Lookup event by name */
- desc = event->desc;
- if (!desc)
+ if (!event_desc)
return -EINVAL;
- fields = desc->fields;
+ fields = event_desc->fields;
if (!fields)
return -EINVAL;
- nr_fields = desc->nr_fields;
+ nr_fields = event_desc->nr_fields;
for (i = 0; i < nr_fields; i++) {
if (fields[i].nofilter)
continue;
}
static
-int apply_context_reloc(struct lttng_event *event,
- struct bytecode_runtime *runtime,
+int apply_context_reloc(struct bytecode_runtime *runtime,
uint32_t runtime_len,
uint32_t reloc_offset,
const char *context_name,
}
static
-int apply_reloc(struct lttng_event *event,
+int apply_reloc(const struct lttng_event_desc *event_desc,
struct bytecode_runtime *runtime,
uint32_t runtime_len,
uint32_t reloc_offset,
op = (struct load_op *) &runtime->code[reloc_offset];
switch (op->op) {
case FILTER_OP_LOAD_FIELD_REF:
- return apply_field_reloc(event, runtime, runtime_len,
+ return apply_field_reloc(event_desc, runtime, runtime_len,
reloc_offset, name, op->op);
case FILTER_OP_GET_CONTEXT_REF:
- return apply_context_reloc(event, runtime, runtime_len,
+ return apply_context_reloc(runtime, runtime_len,
reloc_offset, name, op->op);
case FILTER_OP_GET_SYMBOL:
case FILTER_OP_GET_SYMBOL_FIELD:
}
static
-int bytecode_is_linked(struct lttng_filter_bytecode_node *filter_bytecode,
- struct lttng_event *event)
+int bytecode_is_linked(struct lttng_bytecode_node *bytecode,
+ struct list_head *bytecode_runtime_head)
{
struct lttng_bytecode_runtime *bc_runtime;
- list_for_each_entry(bc_runtime,
- &event->bytecode_runtime_head, node) {
- if (bc_runtime->bc == filter_bytecode)
+ list_for_each_entry(bc_runtime, bytecode_runtime_head, node) {
+ if (bc_runtime->bc == bytecode)
return 1;
}
return 0;
* bytecode runtime.
*/
static
-int _lttng_filter_event_link_bytecode(struct lttng_event *event,
- struct lttng_filter_bytecode_node *filter_bytecode,
+int _lttng_filter_link_bytecode(const struct lttng_event_desc *event_desc,
+ struct lttng_ctx *ctx,
+ struct lttng_bytecode_node *bytecode,
struct list_head *insert_loc)
{
int ret, offset, next_offset;
struct bytecode_runtime *runtime = NULL;
size_t runtime_alloc_len;
- if (!filter_bytecode)
+ if (!bytecode)
return 0;
/* Bytecode already linked */
- if (bytecode_is_linked(filter_bytecode, event))
+ if (bytecode_is_linked(bytecode, insert_loc))
return 0;
dbg_printk("Linking...\n");
/* We don't need the reloc table in the runtime */
- runtime_alloc_len = sizeof(*runtime) + filter_bytecode->bc.reloc_offset;
+ runtime_alloc_len = sizeof(*runtime) + bytecode->bc.reloc_offset;
runtime = kzalloc(runtime_alloc_len, GFP_KERNEL);
if (!runtime) {
ret = -ENOMEM;
goto alloc_error;
}
- runtime->p.bc = filter_bytecode;
- runtime->p.event = event;
- runtime->len = filter_bytecode->bc.reloc_offset;
+ runtime->p.bc = bytecode;
+ runtime->p.ctx = ctx;
+ runtime->len = bytecode->bc.reloc_offset;
/* copy original bytecode */
- memcpy(runtime->code, filter_bytecode->bc.data, runtime->len);
+ memcpy(runtime->code, bytecode->bc.data, runtime->len);
/*
* apply relocs. Those are a uint16_t (offset in bytecode)
* followed by a string (field name).
*/
- for (offset = filter_bytecode->bc.reloc_offset;
- offset < filter_bytecode->bc.len;
+ for (offset = bytecode->bc.reloc_offset;
+ offset < bytecode->bc.len;
offset = next_offset) {
uint16_t reloc_offset =
- *(uint16_t *) &filter_bytecode->bc.data[offset];
+ *(uint16_t *) &bytecode->bc.data[offset];
const char *name =
- (const char *) &filter_bytecode->bc.data[offset + sizeof(uint16_t)];
+ (const char *) &bytecode->bc.data[offset + sizeof(uint16_t)];
- ret = apply_reloc(event, runtime, runtime->len, reloc_offset, name);
+ ret = apply_reloc(event_desc, runtime, runtime->len, reloc_offset, name);
if (ret) {
goto link_error;
}
goto link_error;
}
/* Specialize bytecode */
- ret = lttng_filter_specialize_bytecode(event, runtime);
+ ret = lttng_filter_specialize_bytecode(event_desc, runtime);
if (ret) {
goto link_error;
}
return 0;
link_error:
- runtime->p.filter = lttng_filter_false;
+ runtime->p.filter = lttng_filter_interpret_bytecode_false;
runtime->p.link_failed = 1;
list_add_rcu(&runtime->p.node, insert_loc);
alloc_error:
void lttng_filter_sync_state(struct lttng_bytecode_runtime *runtime)
{
- struct lttng_filter_bytecode_node *bc = runtime->bc;
+ struct lttng_bytecode_node *bc = runtime->bc;
if (!bc->enabler->enabled || runtime->link_failed)
- runtime->filter = lttng_filter_false;
+ runtime->filter = lttng_filter_interpret_bytecode_false;
else
runtime->filter = lttng_filter_interpret_bytecode;
}
/*
* Link bytecode for all enablers referenced by an event.
*/
-void lttng_enabler_event_link_bytecode(struct lttng_event *event,
+void lttng_enabler_link_bytecode(const struct lttng_event_desc *event_desc,
+ struct lttng_ctx *ctx,
+ struct list_head *bytecode_runtime_head,
struct lttng_enabler *enabler)
{
- struct lttng_filter_bytecode_node *bc;
+ struct lttng_bytecode_node *bc;
struct lttng_bytecode_runtime *runtime;
/* Can only be called for events with desc attached */
- WARN_ON_ONCE(!event->desc);
+ WARN_ON_ONCE(!event_desc);
/* Link each bytecode. */
list_for_each_entry(bc, &enabler->filter_bytecode_head, node) {
struct list_head *insert_loc;
list_for_each_entry(runtime,
- &event->bytecode_runtime_head, node) {
+ bytecode_runtime_head, node) {
if (runtime->bc == bc) {
found = 1;
break;
* insert the new bytecode right after it.
*/
list_for_each_entry_reverse(runtime,
- &event->bytecode_runtime_head, node) {
+ bytecode_runtime_head, node) {
if (runtime->bc->bc.seqnum <= bc->bc.seqnum) {
/* insert here */
insert_loc = &runtime->node;
}
}
/* Add to head to list */
- insert_loc = &event->bytecode_runtime_head;
+ insert_loc = bytecode_runtime_head;
add_within:
dbg_printk("linking bytecode\n");
- ret = _lttng_filter_event_link_bytecode(event, bc,
- insert_loc);
+ ret = _lttng_filter_link_bytecode(event_desc, ctx, bc,
+ insert_loc);
if (ret) {
dbg_printk("[lttng filter] warning: cannot link event bytecode\n");
}
* We own the filter_bytecode if we return success.
*/
int lttng_filter_enabler_attach_bytecode(struct lttng_enabler *enabler,
- struct lttng_filter_bytecode_node *filter_bytecode)
+ struct lttng_bytecode_node *filter_bytecode)
{
list_add(&filter_bytecode->node, &enabler->filter_bytecode_head);
return 0;
void lttng_free_enabler_filter_bytecode(struct lttng_enabler *enabler)
{
- struct lttng_filter_bytecode_node *filter_bytecode, *tmp;
+ struct lttng_bytecode_node *filter_bytecode, *tmp;
list_for_each_entry_safe(filter_bytecode, tmp,
&enabler->filter_bytecode_head, node) {
struct bytecode_runtime *runtime, *tmp;
list_for_each_entry_safe(runtime, tmp,
- &event->bytecode_runtime_head, p.node) {
+ &event->filter_bytecode_runtime_head, p.node) {
kfree(runtime->data);
kfree(runtime);
}
projects / lttng-modules.git / blobdiff