-/*
+/* SPDX-License-Identifier: MIT
+ *
* lttng-filter.c
*
* LTTng modules filter code.
*
* Copyright (C) 2010-2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
*/
#include <linux/list.h>
#include <linux/slab.h>
-#include <lttng-filter.h>
+#include <lttng/filter.h>
static const char *opnames[] = {
[ FILTER_OP_UNKNOWN ] = "UNKNOWN",
[ FILTER_OP_MOD ] = "MOD",
[ FILTER_OP_PLUS ] = "PLUS",
[ FILTER_OP_MINUS ] = "MINUS",
- [ FILTER_OP_RSHIFT ] = "RSHIFT",
- [ FILTER_OP_LSHIFT ] = "LSHIFT",
- [ FILTER_OP_BIN_AND ] = "BIN_AND",
- [ FILTER_OP_BIN_OR ] = "BIN_OR",
- [ FILTER_OP_BIN_XOR ] = "BIN_XOR",
+ [ FILTER_OP_BIT_RSHIFT ] = "BIT_RSHIFT",
+ [ FILTER_OP_BIT_LSHIFT ] = "BIT_LSHIFT",
+ [ FILTER_OP_BIT_AND ] = "BIT_AND",
+ [ FILTER_OP_BIT_OR ] = "BIT_OR",
+ [ FILTER_OP_BIT_XOR ] = "BIT_XOR",
/* binary comparators */
[ FILTER_OP_EQ ] = "EQ",
/* globbing pattern binary operator: apply to */
[ FILTER_OP_EQ_STAR_GLOB_STRING ] = "EQ_STAR_GLOB_STRING",
[ FILTER_OP_NE_STAR_GLOB_STRING ] = "NE_STAR_GLOB_STRING",
+
+ /*
+ * Instructions for recursive traversal through composed types.
+ */
+ [ FILTER_OP_GET_CONTEXT_ROOT ] = "GET_CONTEXT_ROOT",
+ [ FILTER_OP_GET_APP_CONTEXT_ROOT ] = "GET_APP_CONTEXT_ROOT",
+ [ FILTER_OP_GET_PAYLOAD_ROOT ] = "GET_PAYLOAD_ROOT",
+
+ [ FILTER_OP_GET_SYMBOL ] = "GET_SYMBOL",
+ [ FILTER_OP_GET_SYMBOL_FIELD ] = "GET_SYMBOL_FIELD",
+ [ FILTER_OP_GET_INDEX_U16 ] = "GET_INDEX_U16",
+ [ FILTER_OP_GET_INDEX_U64 ] = "GET_INDEX_U64",
+
+ [ FILTER_OP_LOAD_FIELD ] = "LOAD_FIELD",
+ [ FILTER_OP_LOAD_FIELD_S8 ] = "LOAD_FIELD_S8",
+ [ FILTER_OP_LOAD_FIELD_S16 ] = "LOAD_FIELD_S16",
+ [ FILTER_OP_LOAD_FIELD_S32 ] = "LOAD_FIELD_S32",
+ [ FILTER_OP_LOAD_FIELD_S64 ] = "LOAD_FIELD_S64",
+ [ FILTER_OP_LOAD_FIELD_U8 ] = "LOAD_FIELD_U8",
+ [ FILTER_OP_LOAD_FIELD_U16 ] = "LOAD_FIELD_U16",
+ [ FILTER_OP_LOAD_FIELD_U32 ] = "LOAD_FIELD_U32",
+ [ FILTER_OP_LOAD_FIELD_U64 ] = "LOAD_FIELD_U64",
+ [ FILTER_OP_LOAD_FIELD_STRING ] = "LOAD_FIELD_STRING",
+ [ FILTER_OP_LOAD_FIELD_SEQUENCE ] = "LOAD_FIELD_SEQUENCE",
+ [ FILTER_OP_LOAD_FIELD_DOUBLE ] = "LOAD_FIELD_DOUBLE",
+
+ [ FILTER_OP_UNARY_BIT_NOT ] = "UNARY_BIT_NOT",
+
+ [ FILTER_OP_RETURN_S64 ] = "RETURN_S64",
};
const char *lttng_filter_print_op(enum filter_op op)
struct bytecode_runtime *runtime,
uint32_t runtime_len,
uint32_t reloc_offset,
- const char *field_name)
+ 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 field_ref *field_ref;
struct load_op *op;
uint32_t field_offset = 0;
return -EINVAL;
nr_fields = desc->nr_fields;
for (i = 0; i < nr_fields; i++) {
+ if (fields[i].nofilter)
+ continue;
if (!strcmp(fields[i].name, field_name)) {
field = &fields[i];
break;
/* compute field offset */
switch (fields[i].type.atype) {
case atype_integer:
- case atype_enum:
+ case atype_enum_nestable:
field_offset += sizeof(int64_t);
break;
- case atype_array:
- case atype_sequence:
+ case atype_array_nestable:
+ if (!lttng_is_bytewise_integer(fields[i].type.u.array_nestable.elem_type))
+ return -EINVAL;
+ field_offset += sizeof(unsigned long);
+ field_offset += sizeof(void *);
+ break;
+ case atype_sequence_nestable:
+ if (!lttng_is_bytewise_integer(fields[i].type.u.sequence_nestable.elem_type))
+ return -EINVAL;
field_offset += sizeof(unsigned long);
field_offset += sizeof(void *);
break;
case atype_string:
field_offset += sizeof(void *);
break;
- case atype_struct: /* Unsupported. */
- case atype_array_compound: /* Unsupported. */
- case atype_sequence_compound: /* Unsupported. */
- case atype_variant: /* Unsupported. */
+ case atype_struct_nestable: /* Unsupported. */
+ case atype_variant_nestable: /* Unsupported. */
default:
return -EINVAL;
}
return -EINVAL;
/* set type */
- 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:
- op->op = FILTER_OP_LOAD_FIELD_REF_S64;
- break;
- case atype_array:
- case atype_sequence:
- if (field->user)
- op->op = FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE;
- else
- op->op = FILTER_OP_LOAD_FIELD_REF_SEQUENCE;
- break;
- case atype_string:
- if (field->user)
- op->op = FILTER_OP_LOAD_FIELD_REF_USER_STRING;
- else
- op->op = FILTER_OP_LOAD_FIELD_REF_STRING;
+ op = (struct load_op *) &runtime->code[reloc_offset];
+
+ switch (filter_op) {
+ case FILTER_OP_LOAD_FIELD_REF:
+ {
+ struct field_ref *field_ref;
+
+ field_ref = (struct field_ref *) op->data;
+ switch (field->type.atype) {
+ case atype_integer:
+ case atype_enum_nestable:
+ op->op = FILTER_OP_LOAD_FIELD_REF_S64;
+ break;
+ case atype_array_nestable:
+ case atype_sequence_nestable:
+ if (field->user)
+ op->op = FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE;
+ else
+ op->op = FILTER_OP_LOAD_FIELD_REF_SEQUENCE;
+ break;
+ case atype_string:
+ if (field->user)
+ op->op = FILTER_OP_LOAD_FIELD_REF_USER_STRING;
+ else
+ op->op = FILTER_OP_LOAD_FIELD_REF_STRING;
+ break;
+ case atype_struct_nestable: /* Unsupported. */
+ case atype_variant_nestable: /* Unsupported. */
+ default:
+ return -EINVAL;
+ }
+ /* set offset */
+ field_ref->offset = (uint16_t) field_offset;
break;
- case atype_struct: /* Unsupported. */
- case atype_array_compound: /* Unsupported. */
- case atype_sequence_compound: /* Unsupported. */
- case atype_variant: /* Unsupported. */
+ }
default:
return -EINVAL;
}
- /* set offset */
- field_ref->offset = (uint16_t) field_offset;
return 0;
}
struct bytecode_runtime *runtime,
uint32_t runtime_len,
uint32_t reloc_offset,
- const char *context_name)
+ const char *context_name,
+ enum filter_op filter_op)
{
- struct field_ref *field_ref;
struct load_op *op;
struct lttng_ctx_field *ctx_field;
int idx;
/* Get context return type */
ctx_field = <tng_static_ctx->fields[idx];
- op = (struct load_op *) &runtime->data[reloc_offset];
- field_ref = (struct field_ref *) op->data;
- switch (ctx_field->event_field.type.atype) {
- case atype_integer:
- case atype_enum:
- op->op = FILTER_OP_GET_CONTEXT_REF_S64;
- break;
- /* Sequence and array supported as string */
- case atype_string:
- case atype_array:
- case atype_sequence:
- BUG_ON(ctx_field->event_field.user);
- op->op = FILTER_OP_GET_CONTEXT_REF_STRING;
+ op = (struct load_op *) &runtime->code[reloc_offset];
+
+ switch (filter_op) {
+ case FILTER_OP_GET_CONTEXT_REF:
+ {
+ struct field_ref *field_ref;
+
+ field_ref = (struct field_ref *) op->data;
+ switch (ctx_field->event_field.type.atype) {
+ case atype_integer:
+ case atype_enum_nestable:
+ op->op = FILTER_OP_GET_CONTEXT_REF_S64;
+ break;
+ /* Sequence and array supported as string */
+ case atype_string:
+ BUG_ON(ctx_field->event_field.user);
+ op->op = FILTER_OP_GET_CONTEXT_REF_STRING;
+ break;
+ case atype_array_nestable:
+ if (!lttng_is_bytewise_integer(ctx_field->event_field.type.u.array_nestable.elem_type))
+ return -EINVAL;
+ BUG_ON(ctx_field->event_field.user);
+ op->op = FILTER_OP_GET_CONTEXT_REF_STRING;
+ break;
+ case atype_sequence_nestable:
+ if (!lttng_is_bytewise_integer(ctx_field->event_field.type.u.sequence_nestable.elem_type))
+ return -EINVAL;
+ BUG_ON(ctx_field->event_field.user);
+ op->op = FILTER_OP_GET_CONTEXT_REF_STRING;
+ break;
+ case atype_struct_nestable: /* Unsupported. */
+ case atype_variant_nestable: /* Unsupported. */
+ default:
+ return -EINVAL;
+ }
+ /* set offset to context index within channel contexts */
+ field_ref->offset = (uint16_t) idx;
break;
- case atype_struct: /* Unsupported. */
- case atype_array_compound: /* Unsupported. */
- case atype_sequence_compound: /* Unsupported. */
- case atype_variant: /* Unsupported. */
+ }
default:
return -EINVAL;
}
- /* set offset to context index within channel contexts */
- field_ref->offset = (uint16_t) idx;
return 0;
}
if (runtime_len - reloc_offset < sizeof(uint16_t))
return -EINVAL;
- op = (struct load_op *) &runtime->data[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,
- reloc_offset, name);
+ reloc_offset, name, op->op);
case FILTER_OP_GET_CONTEXT_REF:
return apply_context_reloc(event, runtime, runtime_len,
- reloc_offset, name);
+ reloc_offset, name, op->op);
+ case FILTER_OP_GET_SYMBOL:
+ case FILTER_OP_GET_SYMBOL_FIELD:
+ /*
+ * Will be handled by load specialize phase or
+ * dynamically by interpreter.
+ */
+ return 0;
default:
printk(KERN_WARNING "Unknown reloc op type %u\n", op->op);
return -EINVAL;
goto alloc_error;
}
runtime->p.bc = filter_bytecode;
+ runtime->p.event = event;
runtime->len = filter_bytecode->bc.reloc_offset;
/* copy original bytecode */
- memcpy(runtime->data, filter_bytecode->bc.data, runtime->len);
+ memcpy(runtime->code, filter_bytecode->bc.data, runtime->len);
/*
* apply relocs. Those are a uint16_t (offset in bytecode)
* followed by a string (field name).
goto link_error;
}
/* Specialize bytecode */
- ret = lttng_filter_specialize_bytecode(runtime);
+ ret = lttng_filter_specialize_bytecode(event, runtime);
if (ret) {
goto link_error;
}
/*
* Insert at specified priority (seqnum) in increasing
- * order.
+ * order. If there already is a bytecode of the same priority,
+ * insert the new bytecode right after it.
*/
list_for_each_entry_reverse(runtime,
&event->bytecode_runtime_head, node) {
- if (runtime->bc->bc.seqnum < bc->bc.seqnum) {
+ if (runtime->bc->bc.seqnum <= bc->bc.seqnum) {
/* insert here */
insert_loc = &runtime->node;
goto add_within;
list_for_each_entry_safe(runtime, tmp,
&event->bytecode_runtime_head, p.node) {
+ kfree(runtime->data);
kfree(runtime);
}
}
projects / lttng-modules.git / blobdiff