X-Git-Url: http://git.lttng.org/?a=blobdiff_plain;f=liblttng-ust%2Flttng-filter-interpreter.c;h=d00179cdd7ff234de83390267a3e9a3de2767fd2;hb=ab249ecfea7ddc352e1fb5c3b97a4f0fbb62f3ca;hp=6c42b20f1c790838f69fb6c6e1605a8419283f3a;hpb=3208818bfe394315cae502a14e01195713299aac;p=lttng-ust.git

diff --git a/liblttng-ust/lttng-filter-interpreter.c b/liblttng-ust/lttng-filter-interpreter.c
index 6c42b20f..d00179cd 100644
--- a/liblttng-ust/lttng-filter-interpreter.c
+++ b/liblttng-ust/lttng-filter-interpreter.c
@@ -28,10 +28,15 @@
 #include <stddef.h>
 #include <stdint.h>
 #include <urcu-pointer.h>
+#include <byteswap.h>
+
 #include <lttng/ust-endian.h>
+#include <lttng/ust-events.h>
+
 #include "lttng-filter.h"
 #include "string-utils.h"
 
+
 /*
  * -1: wildcard found.
  * -2: unknown escape char.
@@ -161,7 +166,7 @@ int stack_strcmp(struct estack *stack, int top, const char *cmp_type)
 	return diff;
 }
 
-uint64_t lttng_filter_false(void *filter_data,
+uint64_t lttng_filter_interpret_bytecode_false(void *filter_data,
 		const char *filter_stack_data)
 {
 	return LTTNG_FILTER_DISCARD;
@@ -220,6 +225,9 @@ LABEL_##name
 
 #endif
 
+#define IS_INTEGER_REGISTER(reg_type) \
+		(reg_type == REG_U64 || reg_type == REG_S64)
+
 static int context_get_index(struct lttng_ctx *ctx,
 		struct load_ptr *ptr,
 		uint32_t idx)
@@ -232,8 +240,7 @@ static int context_get_index(struct lttng_ctx *ctx,
 	ctx_field = &ctx->fields[idx];
 	field = &ctx_field->event_field;
 	ptr->type = LOAD_OBJECT;
-	/* field is only used for types nested within variants. */
-	ptr->field = NULL;
+	ptr->field = field;
 
 	switch (field->type.atype) {
 	case atype_integer:
@@ -370,20 +377,13 @@ static int context_get_index(struct lttng_ctx *ctx,
 	return 0;
 }
 
-static int dynamic_get_index(struct lttng_session *session,
+static int dynamic_get_index(struct lttng_ctx *ctx,
 		struct bytecode_runtime *runtime,
 		uint64_t index, struct estack_entry *stack_top)
 {
 	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:
@@ -399,7 +399,8 @@ static int dynamic_get_index(struct lttng_session *session,
 			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. */
+			assert(stack_top->u.ptr.field->type.atype == atype_array ||
+					stack_top->u.ptr.field->type.atype == atype_array_nestable);
 			stack_top->u.ptr.field = NULL;
 			break;
 		}
@@ -418,7 +419,8 @@ static int dynamic_get_index(struct lttng_session *session,
 			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. */
+			assert(stack_top->u.ptr.field->type.atype == atype_sequence ||
+					stack_top->u.ptr.field->type.atype == atype_sequence_nestable);
 			stack_top->u.ptr.field = NULL;
 			break;
 		}
@@ -437,9 +439,6 @@ static int dynamic_get_index(struct lttng_session *session,
 	case LOAD_ROOT_CONTEXT:
 	case LOAD_ROOT_APP_CONTEXT:	/* Fall-through */
 	{
-		struct lttng_ctx *ctx;
-
-		ctx = rcu_dereference(session->ctx);
 		ret = context_get_index(ctx,
 				&stack_top->u.ptr,
 				gid->ctx_index);
@@ -454,10 +453,13 @@ static int dynamic_get_index(struct lttng_session *session,
 			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;
+		stack_top->u.ptr.rev_bo = gid->elem.rev_bo;
 		break;
 	}
+
+	stack_top->type = REG_PTR;
+
 	return 0;
 
 end:
@@ -524,7 +526,7 @@ static int dynamic_load_field(struct estack_entry *stack_top)
 	case OBJECT_TYPE_U8:
 		dbg_printf("op load field u8\n");
 		stack_top->u.v = *(uint8_t *) stack_top->u.ptr.ptr;
-		stack_top->type = REG_S64;
+		stack_top->type = REG_U64;
 		break;
 	case OBJECT_TYPE_U16:
 	{
@@ -535,7 +537,7 @@ static int dynamic_load_field(struct estack_entry *stack_top)
 		if (stack_top->u.ptr.rev_bo)
 			tmp = bswap_16(tmp);
 		stack_top->u.v = tmp;
-		stack_top->type = REG_S64;
+		stack_top->type = REG_U64;
 		break;
 	}
 	case OBJECT_TYPE_U32:
@@ -547,7 +549,7 @@ static int dynamic_load_field(struct estack_entry *stack_top)
 		if (stack_top->u.ptr.rev_bo)
 			tmp = bswap_32(tmp);
 		stack_top->u.v = tmp;
-		stack_top->type = REG_S64;
+		stack_top->type = REG_U64;
 		break;
 	}
 	case OBJECT_TYPE_U64:
@@ -559,7 +561,7 @@ static int dynamic_load_field(struct estack_entry *stack_top)
 		if (stack_top->u.ptr.rev_bo)
 			tmp = bswap_64(tmp);
 		stack_top->u.v = tmp;
-		stack_top->type = REG_S64;
+		stack_top->type = REG_U64;
 		break;
 	}
 	case OBJECT_TYPE_DOUBLE:
@@ -625,16 +627,90 @@ 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_DOUBLE:
+		output->type = LTTNG_INTERPRETER_TYPE_DOUBLE;
+		output->u.d = ax->u.d;
+		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_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,
-		const char *filter_stack_data)
+static
+uint64_t bytecode_interpret(void *interpreter_data,
+		const char *interpreter_stack_data,
+		struct lttng_interpreter_output *output)
 {
-	struct bytecode_runtime *bytecode = filter_data;
-	struct lttng_session *session = bytecode->p.session;
+	struct bytecode_runtime *bytecode = interpreter_data;
+	struct lttng_ctx *ctx = rcu_dereference(*bytecode->p.pctx);
 	void *pc, *next_pc, *start_pc;
 	int ret = -EINVAL;
 	uint64_t retval = 0;
@@ -797,11 +873,20 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 			/* Handle dynamic typing. */
 			switch (estack_ax_t) {
 			case REG_S64:
+			case REG_U64:
 				retval = !!estack_ax_v;
 				break;
 			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_UNKNOWN:
 			default:
 				ret = -EINVAL;
 				goto end;
@@ -830,9 +915,11 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 		{
 			/* Dynamic typing. */
 			switch (estack_ax_t) {
-			case REG_S64:
+			case REG_S64:	/* Fall-through */
+			case REG_U64:
 				switch (estack_bx_t) {
-				case REG_S64:
+				case REG_S64:	/* Fall-through */
+				case REG_U64:
 					JUMP_TO(FILTER_OP_EQ_S64);
 				case REG_DOUBLE:
 					JUMP_TO(FILTER_OP_EQ_DOUBLE_S64);
@@ -849,7 +936,8 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 				break;
 			case REG_DOUBLE:
 				switch (estack_bx_t) {
-				case REG_S64:
+				case REG_S64:	/* Fall-through */
+				case REG_U64:
 					JUMP_TO(FILTER_OP_EQ_S64_DOUBLE);
 				case REG_DOUBLE:
 					JUMP_TO(FILTER_OP_EQ_DOUBLE);
@@ -867,6 +955,7 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 			case REG_STRING:
 				switch (estack_bx_t) {
 				case REG_S64:	/* Fall-through */
+				case REG_U64:	/* Fall-through */
 				case REG_DOUBLE:
 					ret = -EINVAL;
 					goto end;
@@ -884,6 +973,7 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 			case REG_STAR_GLOB_STRING:
 				switch (estack_bx_t) {
 				case REG_S64:	/* Fall-through */
+				case REG_U64:	/* Fall-through */
 				case REG_DOUBLE:
 					ret = -EINVAL;
 					goto end;
@@ -910,9 +1000,11 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 		{
 			/* Dynamic typing. */
 			switch (estack_ax_t) {
-			case REG_S64:
+			case REG_S64:	/* Fall-through */
+			case REG_U64:
 				switch (estack_bx_t) {
-				case REG_S64:
+				case REG_S64:	/* Fall-through */
+				case REG_U64:
 					JUMP_TO(FILTER_OP_NE_S64);
 				case REG_DOUBLE:
 					JUMP_TO(FILTER_OP_NE_DOUBLE_S64);
@@ -929,7 +1021,8 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 				break;
 			case REG_DOUBLE:
 				switch (estack_bx_t) {
-				case REG_S64:
+				case REG_S64:	/* Fall-through */
+				case REG_U64:
 					JUMP_TO(FILTER_OP_NE_S64_DOUBLE);
 				case REG_DOUBLE:
 					JUMP_TO(FILTER_OP_NE_DOUBLE);
@@ -947,6 +1040,7 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 			case REG_STRING:
 				switch (estack_bx_t) {
 				case REG_S64:	/* Fall-through */
+				case REG_U64:
 				case REG_DOUBLE:
 					ret = -EINVAL;
 					goto end;
@@ -964,6 +1058,7 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 			case REG_STAR_GLOB_STRING:
 				switch (estack_bx_t) {
 				case REG_S64:	/* Fall-through */
+				case REG_U64:
 				case REG_DOUBLE:
 					ret = -EINVAL;
 					goto end;
@@ -990,9 +1085,11 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 		{
 			/* Dynamic typing. */
 			switch (estack_ax_t) {
-			case REG_S64:
+			case REG_S64:	/* Fall-through */
+			case REG_U64:
 				switch (estack_bx_t) {
-				case REG_S64:
+				case REG_S64:	/* Fall-through */
+				case REG_U64:
 					JUMP_TO(FILTER_OP_GT_S64);
 				case REG_DOUBLE:
 					JUMP_TO(FILTER_OP_GT_DOUBLE_S64);
@@ -1009,7 +1106,8 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 				break;
 			case REG_DOUBLE:
 				switch (estack_bx_t) {
-				case REG_S64:
+				case REG_S64:	/* Fall-through */
+				case REG_U64:
 					JUMP_TO(FILTER_OP_GT_S64_DOUBLE);
 				case REG_DOUBLE:
 					JUMP_TO(FILTER_OP_GT_DOUBLE);
@@ -1027,6 +1125,7 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 			case REG_STRING:
 				switch (estack_bx_t) {
 				case REG_S64:	/* Fall-through */
+				case REG_U64:	/* Fall-through */
 				case REG_DOUBLE: /* Fall-through */
 				case REG_STAR_GLOB_STRING:
 					ret = -EINVAL;
@@ -1051,9 +1150,11 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 		{
 			/* Dynamic typing. */
 			switch (estack_ax_t) {
-			case REG_S64:
+			case REG_S64:	/* Fall-through */
+			case REG_U64:
 				switch (estack_bx_t) {
-				case REG_S64:
+				case REG_S64:	/* Fall-through */
+				case REG_U64:
 					JUMP_TO(FILTER_OP_LT_S64);
 				case REG_DOUBLE:
 					JUMP_TO(FILTER_OP_LT_DOUBLE_S64);
@@ -1070,7 +1171,8 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 				break;
 			case REG_DOUBLE:
 				switch (estack_bx_t) {
-				case REG_S64:
+				case REG_S64:	/* Fall-through */
+				case REG_U64:
 					JUMP_TO(FILTER_OP_LT_S64_DOUBLE);
 				case REG_DOUBLE:
 					JUMP_TO(FILTER_OP_LT_DOUBLE);
@@ -1088,6 +1190,7 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 			case REG_STRING:
 				switch (estack_bx_t) {
 				case REG_S64:	/* Fall-through */
+				case REG_U64:	/* Fall-through */
 				case REG_DOUBLE: /* Fall-through */
 				case REG_STAR_GLOB_STRING:
 					ret = -EINVAL;
@@ -1112,9 +1215,11 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 		{
 			/* Dynamic typing. */
 			switch (estack_ax_t) {
-			case REG_S64:
+			case REG_S64:	/* Fall-through */
+			case REG_U64:
 				switch (estack_bx_t) {
-				case REG_S64:
+				case REG_S64:	/* Fall-through */
+				case REG_U64:
 					JUMP_TO(FILTER_OP_GE_S64);
 				case REG_DOUBLE:
 					JUMP_TO(FILTER_OP_GE_DOUBLE_S64);
@@ -1131,7 +1236,8 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 				break;
 			case REG_DOUBLE:
 				switch (estack_bx_t) {
-				case REG_S64:
+				case REG_S64:	/* Fall-through */
+				case REG_U64:
 					JUMP_TO(FILTER_OP_GE_S64_DOUBLE);
 				case REG_DOUBLE:
 					JUMP_TO(FILTER_OP_GE_DOUBLE);
@@ -1149,6 +1255,7 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 			case REG_STRING:
 				switch (estack_bx_t) {
 				case REG_S64:	/* Fall-through */
+				case REG_U64:	/* Fall-through */
 				case REG_DOUBLE: /* Fall-through */
 				case REG_STAR_GLOB_STRING:
 					ret = -EINVAL;
@@ -1173,9 +1280,11 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 		{
 			/* Dynamic typing. */
 			switch (estack_ax_t) {
-			case REG_S64:
+			case REG_S64:	/* Fall-through */
+			case REG_U64:
 				switch (estack_bx_t) {
-				case REG_S64:
+				case REG_S64:	/* Fall-through */
+				case REG_U64:
 					JUMP_TO(FILTER_OP_LE_S64);
 				case REG_DOUBLE:
 					JUMP_TO(FILTER_OP_LE_DOUBLE_S64);
@@ -1192,7 +1301,8 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 				break;
 			case REG_DOUBLE:
 				switch (estack_bx_t) {
-				case REG_S64:
+				case REG_S64:	/* Fall-through */
+				case REG_U64:
 					JUMP_TO(FILTER_OP_LE_S64_DOUBLE);
 				case REG_DOUBLE:
 					JUMP_TO(FILTER_OP_LE_DOUBLE);
@@ -1210,6 +1320,7 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 			case REG_STRING:
 				switch (estack_bx_t) {
 				case REG_S64:	/* Fall-through */
+				case REG_U64:	/* Fall-through */
 				case REG_DOUBLE: /* Fall-through */
 				case REG_STAR_GLOB_STRING:
 					ret = -EINVAL;
@@ -1593,11 +1704,11 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 		{
 			int64_t res;
 
-			/* Dynamic typing. */
-			if (estack_ax_t != REG_S64 || estack_bx_t != REG_S64) {
+			if (!IS_INTEGER_REGISTER(estack_ax_t) || !IS_INTEGER_REGISTER(estack_bx_t)) {
 				ret = -EINVAL;
 				goto end;
 			}
+
 			/* Catch undefined behavior. */
 			if (caa_unlikely(estack_ax_v < 0 || estack_ax_v >= 64)) {
 				ret = -EINVAL;
@@ -1606,7 +1717,7 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 			res = ((uint64_t) estack_bx_v >> (uint32_t) estack_ax_v);
 			estack_pop(stack, top, ax, bx, ax_t, bx_t);
 			estack_ax_v = res;
-			estack_ax_t = REG_S64;
+			estack_ax_t = REG_U64;
 			next_pc += sizeof(struct binary_op);
 			PO;
 		}
@@ -1614,11 +1725,11 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 		{
 			int64_t res;
 
-			/* Dynamic typing. */
-			if (estack_ax_t != REG_S64 || estack_bx_t != REG_S64) {
+			if (!IS_INTEGER_REGISTER(estack_ax_t) || !IS_INTEGER_REGISTER(estack_bx_t)) {
 				ret = -EINVAL;
 				goto end;
 			}
+
 			/* Catch undefined behavior. */
 			if (caa_unlikely(estack_ax_v < 0 || estack_ax_v >= 64)) {
 				ret = -EINVAL;
@@ -1627,7 +1738,7 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 			res = ((uint64_t) estack_bx_v << (uint32_t) estack_ax_v);
 			estack_pop(stack, top, ax, bx, ax_t, bx_t);
 			estack_ax_v = res;
-			estack_ax_t = REG_S64;
+			estack_ax_t = REG_U64;
 			next_pc += sizeof(struct binary_op);
 			PO;
 		}
@@ -1635,8 +1746,7 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 		{
 			int64_t res;
 
-			/* Dynamic typing. */
-			if (estack_ax_t != REG_S64 || estack_bx_t != REG_S64) {
+			if (!IS_INTEGER_REGISTER(estack_ax_t) || !IS_INTEGER_REGISTER(estack_bx_t)) {
 				ret = -EINVAL;
 				goto end;
 			}
@@ -1644,7 +1754,7 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 			res = ((uint64_t) estack_bx_v & (uint64_t) estack_ax_v);
 			estack_pop(stack, top, ax, bx, ax_t, bx_t);
 			estack_ax_v = res;
-			estack_ax_t = REG_S64;
+			estack_ax_t = REG_U64;
 			next_pc += sizeof(struct binary_op);
 			PO;
 		}
@@ -1652,8 +1762,7 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 		{
 			int64_t res;
 
-			/* Dynamic typing. */
-			if (estack_ax_t != REG_S64 || estack_bx_t != REG_S64) {
+			if (!IS_INTEGER_REGISTER(estack_ax_t) || !IS_INTEGER_REGISTER(estack_bx_t)) {
 				ret = -EINVAL;
 				goto end;
 			}
@@ -1661,7 +1770,7 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 			res = ((uint64_t) estack_bx_v | (uint64_t) estack_ax_v);
 			estack_pop(stack, top, ax, bx, ax_t, bx_t);
 			estack_ax_v = res;
-			estack_ax_t = REG_S64;
+			estack_ax_t = REG_U64;
 			next_pc += sizeof(struct binary_op);
 			PO;
 		}
@@ -1669,8 +1778,7 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 		{
 			int64_t res;
 
-			/* Dynamic typing. */
-			if (estack_ax_t != REG_S64 || estack_bx_t != REG_S64) {
+			if (!IS_INTEGER_REGISTER(estack_ax_t) || !IS_INTEGER_REGISTER(estack_bx_t)) {
 				ret = -EINVAL;
 				goto end;
 			}
@@ -1678,7 +1786,7 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 			res = ((uint64_t) estack_bx_v ^ (uint64_t) estack_ax_v);
 			estack_pop(stack, top, ax, bx, ax_t, bx_t);
 			estack_ax_v = res;
-			estack_ax_t = REG_S64;
+			estack_ax_t = REG_U64;
 			next_pc += sizeof(struct binary_op);
 			PO;
 		}
@@ -1689,6 +1797,7 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 			/* Dynamic typing. */
 			switch (estack_ax_t) {
 			case REG_S64:	/* Fall-through. */
+			case REG_U64:
 				JUMP_TO(FILTER_OP_UNARY_PLUS_S64);
 			case REG_DOUBLE:
 				JUMP_TO(FILTER_OP_UNARY_PLUS_DOUBLE);
@@ -1707,7 +1816,8 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 		{
 			/* Dynamic typing. */
 			switch (estack_ax_t) {
-			case REG_S64:
+			case REG_S64:	/* Fall-through. */
+			case REG_U64:
 				JUMP_TO(FILTER_OP_UNARY_MINUS_S64);
 			case REG_DOUBLE:
 				JUMP_TO(FILTER_OP_UNARY_MINUS_DOUBLE);
@@ -1726,7 +1836,8 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 		{
 			/* Dynamic typing. */
 			switch (estack_ax_t) {
-			case REG_S64:
+			case REG_S64:	/* Fall-through. */
+			case REG_U64:
 				JUMP_TO(FILTER_OP_UNARY_NOT_S64);
 			case REG_DOUBLE:
 				JUMP_TO(FILTER_OP_UNARY_NOT_DOUBLE);
@@ -1747,12 +1858,13 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 		OP(FILTER_OP_UNARY_BIT_NOT):
 		{
 			/* Dynamic typing. */
-			if (estack_ax_t != REG_S64) {
+			if (!IS_INTEGER_REGISTER(estack_ax_t)) {
 				ret = -EINVAL;
 				goto end;
 			}
 
 			estack_ax_v = ~(uint64_t) estack_ax_v;
+			estack_ax_t = REG_U64;
 			next_pc += sizeof(struct unary_op);
 			PO;
 		}
@@ -1778,6 +1890,7 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 		OP(FILTER_OP_UNARY_NOT_S64):
 		{
 			estack_ax_v = !estack_ax_v;
+			estack_ax_t = REG_S64;
 			next_pc += sizeof(struct unary_op);
 			PO;
 		}
@@ -1794,7 +1907,7 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 		{
 			struct logical_op *insn = (struct logical_op *) pc;
 
-			if (estack_ax_t != REG_S64) {
+			if (estack_ax_t != REG_S64 && estack_ax_t != REG_U64) {
 				ret = -EINVAL;
 				goto end;
 			}
@@ -1814,7 +1927,7 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 		{
 			struct logical_op *insn = (struct logical_op *) pc;
 
-			if (estack_ax_t != REG_S64) {
+			if (estack_ax_t != REG_S64 && estack_ax_t != REG_U64) {
 				ret = -EINVAL;
 				goto end;
 			}
@@ -1843,7 +1956,7 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 				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_printf("Filter warning: loading a NULL string.\n");
 				ret = -EINVAL;
@@ -1867,9 +1980,9 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 				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)]);
 			estack_ax_t = REG_STRING;
 			if (unlikely(!estack_ax(stack, top)->u.s.str)) {
@@ -1892,7 +2005,7 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 				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_printf("ref load s64 %" PRIi64 "\n", estack_ax_v);
 			next_pc += sizeof(struct load_op) + sizeof(struct field_ref);
@@ -1907,7 +2020,7 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 			dbg_printf("load field ref offset %u type double\n",
 				ref->offset);
 			estack_push(stack, top, ax, bx, ax_t, bx_t);
-			memcpy(&estack_ax(stack, top)->u.d, &filter_stack_data[ref->offset],
+			memcpy(&estack_ax(stack, top)->u.d, &interpreter_stack_data[ref->offset],
 				sizeof(struct literal_double));
 			estack_ax_t = REG_DOUBLE;
 			dbg_printf("ref load double %g\n", estack_ax(stack, top)->u.d);
@@ -1982,6 +2095,9 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 				JUMP_TO(FILTER_OP_CAST_NOP);
 			case REG_DOUBLE:
 				JUMP_TO(FILTER_OP_CAST_DOUBLE_TO_S64);
+			case REG_U64:
+				estack_ax_t = REG_S64;
+				next_pc += sizeof(struct cast_op);
 			case REG_STRING: /* Fall-through */
 			case REG_STAR_GLOB_STRING:
 				ret = -EINVAL;
@@ -2013,13 +2129,11 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 		{
 			struct load_op *insn = (struct load_op *) pc;
 			struct field_ref *ref = (struct field_ref *) insn->data;
-			struct lttng_ctx *ctx;
 			struct lttng_ctx_field *ctx_field;
 			struct lttng_ctx_value v;
 
 			dbg_printf("get context ref offset %u type dynamic\n",
 				ref->offset);
-			ctx = rcu_dereference(session->ctx);
 			ctx_field = &ctx->fields[ref->offset];
 			ctx_field->get_value(ctx_field, &v);
 			estack_push(stack, top, ax, bx, ax_t, bx_t);
@@ -2063,13 +2177,11 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 		{
 			struct load_op *insn = (struct load_op *) pc;
 			struct field_ref *ref = (struct field_ref *) insn->data;
-			struct lttng_ctx *ctx;
 			struct lttng_ctx_field *ctx_field;
 			struct lttng_ctx_value v;
 
 			dbg_printf("get context ref offset %u type string\n",
 				ref->offset);
-			ctx = rcu_dereference(session->ctx);
 			ctx_field = &ctx->fields[ref->offset];
 			ctx_field->get_value(ctx_field, &v);
 			estack_push(stack, top, ax, bx, ax_t, bx_t);
@@ -2092,13 +2204,11 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 		{
 			struct load_op *insn = (struct load_op *) pc;
 			struct field_ref *ref = (struct field_ref *) insn->data;
-			struct lttng_ctx *ctx;
 			struct lttng_ctx_field *ctx_field;
 			struct lttng_ctx_value v;
 
 			dbg_printf("get context ref offset %u type s64\n",
 				ref->offset);
-			ctx = rcu_dereference(session->ctx);
 			ctx_field = &ctx->fields[ref->offset];
 			ctx_field->get_value(ctx_field, &v);
 			estack_push(stack, top, ax, bx, ax_t, bx_t);
@@ -2113,13 +2223,11 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 		{
 			struct load_op *insn = (struct load_op *) pc;
 			struct field_ref *ref = (struct field_ref *) insn->data;
-			struct lttng_ctx *ctx;
 			struct lttng_ctx_field *ctx_field;
 			struct lttng_ctx_value v;
 
 			dbg_printf("get context ref offset %u type double\n",
 				ref->offset);
-			ctx = rcu_dereference(session->ctx);
 			ctx_field = &ctx->fields[ref->offset];
 			ctx_field->get_value(ctx_field, &v);
 			estack_push(stack, top, ax, bx, ax_t, bx_t);
@@ -2159,7 +2267,7 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 			dbg_printf("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_t = REG_PTR;
@@ -2205,7 +2313,7 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 			struct get_index_u16 *index = (struct get_index_u16 *) insn->data;
 
 			dbg_printf("op get index u16\n");
-			ret = dynamic_get_index(session, bytecode, index->index, estack_ax(stack, top));
+			ret = dynamic_get_index(ctx, bytecode, index->index, estack_ax(stack, top));
 			if (ret)
 				goto end;
 			estack_ax_v = estack_ax(stack, top)->u.v;
@@ -2220,7 +2328,7 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 			struct get_index_u64 *index = (struct get_index_u64 *) insn->data;
 
 			dbg_printf("op get index u64\n");
-			ret = dynamic_get_index(session, bytecode, index->index, estack_ax(stack, top));
+			ret = dynamic_get_index(ctx, bytecode, index->index, estack_ax(stack, top));
 			if (ret)
 				goto end;
 			estack_ax_v = estack_ax(stack, top)->u.v;
@@ -2282,7 +2390,7 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 			dbg_printf("op load field u8\n");
 
 			estack_ax_v = *(uint8_t *) estack_ax(stack, top)->u.ptr.ptr;
-			estack_ax_t = REG_S64;
+			estack_ax_t = REG_U64;
 			next_pc += sizeof(struct load_op);
 			PO;
 		}
@@ -2291,7 +2399,7 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 			dbg_printf("op load field u16\n");
 
 			estack_ax_v = *(uint16_t *) estack_ax(stack, top)->u.ptr.ptr;
-			estack_ax_t = REG_S64;
+			estack_ax_t = REG_U64;
 			next_pc += sizeof(struct load_op);
 			PO;
 		}
@@ -2300,7 +2408,7 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 			dbg_printf("op load field u32\n");
 
 			estack_ax_v = *(uint32_t *) estack_ax(stack, top)->u.ptr.ptr;
-			estack_ax_t = REG_S64;
+			estack_ax_t = REG_U64;
 			next_pc += sizeof(struct load_op);
 			PO;
 		}
@@ -2309,7 +2417,7 @@ uint64_t lttng_filter_interpret_bytecode(void *filter_data,
 			dbg_printf("op load field u64\n");
 
 			estack_ax_v = *(uint64_t *) estack_ax(stack, top)->u.ptr.ptr;
-			estack_ax_t = REG_S64;
+			estack_ax_t = REG_U64;
 			next_pc += sizeof(struct load_op);
 			PO;
 		}
@@ -2370,9 +2478,21 @@ end:
 	/* 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;
 }
 
+uint64_t lttng_filter_interpret_bytecode(void *filter_data,
+		const char *filter_stack_data)
+{
+	return bytecode_interpret(filter_data, filter_stack_data, NULL);
+}
+
 #undef START_OP
 #undef OP
 #undef PO