X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=liblttng-ust%2Flttng-filter.c;h=d52658ae14dd7f4e135a5e6e0df306069bd94f4b;hb=HEAD;hp=ee94a4ccc2498d4c1272935e67dda7e1eadbe979;hpb=53569322d40ed45abe0368ddb08eb4a2738afc37;p=lttng-ust.git

diff --git a/liblttng-ust/lttng-filter.c b/liblttng-ust/lttng-filter.c
deleted file mode 100644
index ee94a4cc..00000000
--- a/liblttng-ust/lttng-filter.c
+++ /dev/null
@@ -1,496 +0,0 @@
-/*
- * lttng-filter.c
- *
- * LTTng UST filter code.
- *
- * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; only
- * version 2.1 of the License.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include <urcu/rculist.h>
-#include "lttng-filter.h"
-
-static const char *opnames[] = {
-	[ FILTER_OP_UNKNOWN ] = "UNKNOWN",
-
-	[ FILTER_OP_RETURN ] = "RETURN",
-
-	/* binary */
-	[ FILTER_OP_MUL ] = "MUL",
-	[ FILTER_OP_DIV ] = "DIV",
-	[ 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",
-
-	/* binary comparators */
-	[ FILTER_OP_EQ ] = "EQ",
-	[ FILTER_OP_NE ] = "NE",
-	[ FILTER_OP_GT ] = "GT",
-	[ FILTER_OP_LT ] = "LT",
-	[ FILTER_OP_GE ] = "GE",
-	[ FILTER_OP_LE ] = "LE",
-
-	/* string binary comparators */
-	[ FILTER_OP_EQ_STRING ] = "EQ_STRING",
-	[ FILTER_OP_NE_STRING ] = "NE_STRING",
-	[ FILTER_OP_GT_STRING ] = "GT_STRING",
-	[ FILTER_OP_LT_STRING ] = "LT_STRING",
-	[ FILTER_OP_GE_STRING ] = "GE_STRING",
-	[ FILTER_OP_LE_STRING ] = "LE_STRING",
-
-	/* s64 binary comparators */
-	[ FILTER_OP_EQ_S64 ] = "EQ_S64",
-	[ FILTER_OP_NE_S64 ] = "NE_S64",
-	[ FILTER_OP_GT_S64 ] = "GT_S64",
-	[ FILTER_OP_LT_S64 ] = "LT_S64",
-	[ FILTER_OP_GE_S64 ] = "GE_S64",
-	[ FILTER_OP_LE_S64 ] = "LE_S64",
-
-	/* double binary comparators */
-	[ FILTER_OP_EQ_DOUBLE ] = "EQ_DOUBLE",
-	[ FILTER_OP_NE_DOUBLE ] = "NE_DOUBLE",
-	[ FILTER_OP_GT_DOUBLE ] = "GT_DOUBLE",
-	[ FILTER_OP_LT_DOUBLE ] = "LT_DOUBLE",
-	[ FILTER_OP_GE_DOUBLE ] = "GE_DOUBLE",
-	[ FILTER_OP_LE_DOUBLE ] = "LE_DOUBLE",
-
-	/* Mixed S64-double binary comparators */
-	[ FILTER_OP_EQ_DOUBLE_S64 ] = "EQ_DOUBLE_S64",
-	[ FILTER_OP_NE_DOUBLE_S64 ] = "NE_DOUBLE_S64",
-	[ FILTER_OP_GT_DOUBLE_S64 ] = "GT_DOUBLE_S64",
-	[ FILTER_OP_LT_DOUBLE_S64 ] = "LT_DOUBLE_S64",
-	[ FILTER_OP_GE_DOUBLE_S64 ] = "GE_DOUBLE_S64",
-	[ FILTER_OP_LE_DOUBLE_S64 ] = "LE_DOUBLE_S64",
-
-	[ FILTER_OP_EQ_S64_DOUBLE ] = "EQ_S64_DOUBLE",
-	[ FILTER_OP_NE_S64_DOUBLE ] = "NE_S64_DOUBLE",
-	[ FILTER_OP_GT_S64_DOUBLE ] = "GT_S64_DOUBLE",
-	[ FILTER_OP_LT_S64_DOUBLE ] = "LT_S64_DOUBLE",
-	[ FILTER_OP_GE_S64_DOUBLE ] = "GE_S64_DOUBLE",
-	[ FILTER_OP_LE_S64_DOUBLE ] = "LE_S64_DOUBLE",
-
-	/* unary */
-	[ FILTER_OP_UNARY_PLUS ] = "UNARY_PLUS",
-	[ FILTER_OP_UNARY_MINUS ] = "UNARY_MINUS",
-	[ FILTER_OP_UNARY_NOT ] = "UNARY_NOT",
-	[ FILTER_OP_UNARY_PLUS_S64 ] = "UNARY_PLUS_S64",
-	[ FILTER_OP_UNARY_MINUS_S64 ] = "UNARY_MINUS_S64",
-	[ FILTER_OP_UNARY_NOT_S64 ] = "UNARY_NOT_S64",
-	[ FILTER_OP_UNARY_PLUS_DOUBLE ] = "UNARY_PLUS_DOUBLE",
-	[ FILTER_OP_UNARY_MINUS_DOUBLE ] = "UNARY_MINUS_DOUBLE",
-	[ FILTER_OP_UNARY_NOT_DOUBLE ] = "UNARY_NOT_DOUBLE",
-
-	/* logical */
-	[ FILTER_OP_AND ] = "AND",
-	[ FILTER_OP_OR ] = "OR",
-
-	/* load field ref */
-	[ FILTER_OP_LOAD_FIELD_REF ] = "LOAD_FIELD_REF",
-	[ FILTER_OP_LOAD_FIELD_REF_STRING ] = "LOAD_FIELD_REF_STRING",
-	[ FILTER_OP_LOAD_FIELD_REF_SEQUENCE ] = "LOAD_FIELD_REF_SEQUENCE",
-	[ FILTER_OP_LOAD_FIELD_REF_S64 ] = "LOAD_FIELD_REF_S64",
-	[ FILTER_OP_LOAD_FIELD_REF_DOUBLE ] = "LOAD_FIELD_REF_DOUBLE",
-
-	/* load from immediate operand */
-	[ 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",
-
-	/* get context ref */
-	[ FILTER_OP_GET_CONTEXT_REF ] = "GET_CONTEXT_REF",
-	[ FILTER_OP_GET_CONTEXT_REF_STRING ] = "GET_CONTEXT_REF_STRING",
-	[ FILTER_OP_GET_CONTEXT_REF_S64 ] = "GET_CONTEXT_REF_S64",
-	[ FILTER_OP_GET_CONTEXT_REF_DOUBLE ] = "GET_CONTEXT_REF_DOUBLE",
-};
-
-const char *print_op(enum filter_op op)
-{
-	if (op >= NR_FILTER_OPS)
-		return "UNKNOWN";
-	else
-		return opnames[op];
-}
-
-static
-int apply_field_reloc(struct lttng_event *event,
-		struct bytecode_runtime *runtime,
-		uint32_t runtime_len,
-		uint32_t reloc_offset,
-		const char *field_name)
-{
-	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;
-
-	dbg_printf("Apply field reloc: %u %s\n", reloc_offset, field_name);
-
-	/* Lookup event by name */
-	desc = event->desc;
-	if (!desc)
-		return -EINVAL;
-	fields = desc->fields;
-	if (!fields)
-		return -EINVAL;
-	nr_fields = desc->nr_fields;
-	for (i = 0; i < nr_fields; i++) {
-		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:
-			field_offset += sizeof(int64_t);
-			break;
-		case atype_array:
-		case atype_sequence:
-			field_offset += sizeof(unsigned long);
-			field_offset += sizeof(void *);
-			break;
-		case atype_string:
-			field_offset += sizeof(void *);
-			break;
-		case atype_float:
-			field_offset += sizeof(double);
-			break;
-		default:
-			return -EINVAL;
-		}
-	}
-	if (!field)
-		return -EINVAL;
-
-	/* Check if field offset is too large for 16-bit offset */
-	if (field_offset > FILTER_BYTECODE_MAX_LEN - 1)
-		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:
-		op->op = FILTER_OP_LOAD_FIELD_REF_SEQUENCE;
-		break;
-	case atype_string:
-		op->op = FILTER_OP_LOAD_FIELD_REF_STRING;
-		break;
-	case atype_float:
-		op->op = FILTER_OP_LOAD_FIELD_REF_DOUBLE;
-		break;
-	default:
-		return -EINVAL;
-	}
-	/* set offset */
-	field_ref->offset = (uint16_t) field_offset;
-	return 0;
-}
-
-static
-int apply_context_reloc(struct lttng_event *event,
-		struct bytecode_runtime *runtime,
-		uint32_t runtime_len,
-		uint32_t reloc_offset,
-		const char *context_name)
-{
-	struct field_ref *field_ref;
-	struct load_op *op;
-	struct lttng_ctx_field *ctx_field;
-	int idx;
-	struct lttng_session *session = runtime->p.session;
-
-	dbg_printf("Apply context reloc: %u %s\n", reloc_offset, context_name);
-
-	/* Get context index */
-	idx = lttng_get_context_index(session->ctx, context_name);
-	if (idx < 0) {
-		if (lttng_context_is_app(context_name)) {
-			int ret;
-
-			ret = lttng_ust_add_app_context_to_ctx_rcu(context_name,
-					&session->ctx);
-			if (ret)
-				return ret;
-			idx = lttng_get_context_index(session->ctx,
-				context_name);
-			if (idx < 0)
-				return -ENOENT;
-		} else {
-			return -ENOENT;
-		}
-	}
-	/* Check if idx is too large for 16-bit offset */
-	if (idx > FILTER_BYTECODE_MAX_LEN - 1)
-		return -EINVAL;
-
-	/* Get context return type */
-	ctx_field = &session->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:
-		op->op = FILTER_OP_GET_CONTEXT_REF_STRING;
-		break;
-	case atype_float:
-		op->op = FILTER_OP_GET_CONTEXT_REF_DOUBLE;
-		break;
-	case atype_dynamic:
-		op->op = FILTER_OP_GET_CONTEXT_REF;
-		break;
-	default:
-		return -EINVAL;
-	}
-	/* set offset to context index within channel contexts */
-	field_ref->offset = (uint16_t) idx;
-	return 0;
-}
-
-static
-int apply_reloc(struct lttng_event *event,
-		struct bytecode_runtime *runtime,
-		uint32_t runtime_len,
-		uint32_t reloc_offset,
-		const char *name)
-{
-	struct load_op *op;
-
-	dbg_printf("Apply reloc: %u %s\n", reloc_offset, name);
-
-	/* Ensure that the reloc is within the code */
-	if (runtime_len - reloc_offset < sizeof(uint16_t))
-		return -EINVAL;
-
-	op = (struct load_op *) &runtime->data[reloc_offset];
-	switch (op->op) {
-	case FILTER_OP_LOAD_FIELD_REF:
-		return apply_field_reloc(event, runtime, runtime_len,
-			reloc_offset, name);
-	case FILTER_OP_GET_CONTEXT_REF:
-		return apply_context_reloc(event, runtime, runtime_len,
-			reloc_offset, name);
-	default:
-		ERR("Unknown reloc op type %u\n", op->op);
-		return -EINVAL;
-	}
-	return 0;
-}
-
-static
-int bytecode_is_linked(struct lttng_ust_filter_bytecode_node *filter_bytecode,
-		struct lttng_event *event)
-{
-	struct lttng_bytecode_runtime *bc_runtime;
-
-	cds_list_for_each_entry(bc_runtime,
-			&event->bytecode_runtime_head, node) {
-		if (bc_runtime->bc == filter_bytecode)
-			return 1;
-	}
-	return 0;
-}
-
-/*
- * Take a bytecode with reloc table and link it to an event to create a
- * bytecode runtime.
- */
-static
-int _lttng_filter_event_link_bytecode(struct lttng_event *event,
-		struct lttng_ust_filter_bytecode_node *filter_bytecode,
-		struct cds_list_head *insert_loc)
-{
-	int ret, offset, next_offset;
-	struct bytecode_runtime *runtime = NULL;
-	size_t runtime_alloc_len;
-
-	if (!filter_bytecode)
-		return 0;
-	/* Bytecode already linked */
-	if (bytecode_is_linked(filter_bytecode, event))
-		return 0;
-
-	dbg_printf("Linking...\n");
-
-	/* We don't need the reloc table in the runtime */
-	runtime_alloc_len = sizeof(*runtime) + filter_bytecode->bc.reloc_offset;
-	runtime = zmalloc(runtime_alloc_len);
-	if (!runtime) {
-		ret = -ENOMEM;
-		goto alloc_error;
-	}
-	runtime->p.bc = filter_bytecode;
-	runtime->p.session = event->chan->session;
-	runtime->len = filter_bytecode->bc.reloc_offset;
-	/* copy original bytecode */
-	memcpy(runtime->data, filter_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;
-			offset = next_offset) {
-		uint16_t reloc_offset =
-			*(uint16_t *) &filter_bytecode->bc.data[offset];
-		const char *name =
-			(const char *) &filter_bytecode->bc.data[offset + sizeof(uint16_t)];
-
-		ret = apply_reloc(event, runtime, runtime->len, reloc_offset, name);
-		if (ret) {
-			goto link_error;
-		}
-		next_offset = offset + sizeof(uint16_t) + strlen(name) + 1;
-	}
-	/* Validate bytecode */
-	ret = lttng_filter_validate_bytecode(runtime);
-	if (ret) {
-		goto link_error;
-	}
-	/* Specialize bytecode */
-	ret = lttng_filter_specialize_bytecode(runtime);
-	if (ret) {
-		goto link_error;
-	}
-	runtime->p.filter = lttng_filter_interpret_bytecode;
-	runtime->p.link_failed = 0;
-	cds_list_add_rcu(&runtime->p.node, insert_loc);
-	dbg_printf("Linking successful.\n");
-	return 0;
-
-link_error:
-	runtime->p.filter = lttng_filter_false;
-	runtime->p.link_failed = 1;
-	cds_list_add_rcu(&runtime->p.node, insert_loc);
-alloc_error:
-	dbg_printf("Linking failed.\n");
-	return ret;
-}
-
-void lttng_filter_sync_state(struct lttng_bytecode_runtime *runtime)
-{
-	struct lttng_ust_filter_bytecode_node *bc = runtime->bc;
-
-	if (!bc->enabler->enabled || runtime->link_failed)
-		runtime->filter = lttng_filter_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,
-		struct lttng_enabler *enabler)
-{
-	struct lttng_ust_filter_bytecode_node *bc;
-	struct lttng_bytecode_runtime *runtime;
-
-	/* Can only be called for events with desc attached */
-	assert(event->desc);
-
-	/* Link each bytecode. */
-	cds_list_for_each_entry(bc, &enabler->filter_bytecode_head, node) {
-		int found = 0, ret;
-		struct cds_list_head *insert_loc;
-
-		cds_list_for_each_entry(runtime,
-				&event->bytecode_runtime_head, node) {
-			if (runtime->bc == bc) {
-				found = 1;
-				break;
-			}
-		}
-		/* Skip bytecode already linked */
-		if (found)
-			continue;
-
-		/*
-		 * Insert at specified priority (seqnum) in increasing
-		 * order.
-		 */
-		cds_list_for_each_entry_reverse(runtime,
-				&event->bytecode_runtime_head, node) {
-			if (runtime->bc->bc.seqnum < bc->bc.seqnum) {
-				/* insert here */
-				insert_loc = &runtime->node;
-				goto add_within;
-			}
-		}
-		/* Add to head to list */
-		insert_loc = &event->bytecode_runtime_head;
-	add_within:
-		dbg_printf("linking bytecode\n");
-		ret = _lttng_filter_event_link_bytecode(event, bc,
-				insert_loc);
-		if (ret) {
-			dbg_printf("[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_ust_filter_bytecode_node *filter_bytecode)
-{
-	cds_list_add(&filter_bytecode->node, &enabler->filter_bytecode_head);
-	return 0;
-}
-
-void lttng_free_enabler_filter_bytecode(struct lttng_enabler *enabler)
-{
-	struct lttng_ust_filter_bytecode_node *filter_bytecode, *tmp;
-
-	cds_list_for_each_entry_safe(filter_bytecode, tmp,
-			&enabler->filter_bytecode_head, node) {
-		free(filter_bytecode);
-	}
-}
-
-void lttng_free_event_filter_runtime(struct lttng_event *event)
-{
-	struct bytecode_runtime *runtime, *tmp;
-
-	cds_list_for_each_entry_safe(runtime, tmp,
-			&event->bytecode_runtime_head, p.node) {
-		free(runtime);
-	}
-}