Filter: index array, sequences, implement bitwise binary operators

[lttng-ust.git] / liblttng-ust / lttng-filter.h

diff --git a/liblttng-ust/lttng-filter.h b/liblttng-ust/lttng-filter.h
index 10832ceab0301f5bb4c3e4dda100129600faed96..e425b4a535426a398f809d7cd5742931a357ec6a 100644 (file)
--- a/liblttng-ust/lttng-filter.h
+++ b/liblttng-ust/lttng-filter.h
@@ -45,6 +45,8 @@
 #define FILTER_STACK_LEN       10      /* includes 2 dummy */
 #define FILTER_STACK_EMPTY     1
 
+#define FILTER_MAX_DATA_LEN    65536
+
 #ifndef min_t
 #define min_t(type, a, b)      \
                ((type) (a) < (type) (b) ? (type) (a) : (type) (b))
@@ -75,20 +77,73 @@ do {                                                                \
 /* Linked bytecode. Child of struct lttng_bytecode_runtime. */
 struct bytecode_runtime {
        struct lttng_bytecode_runtime p;
+       size_t data_len;
+       size_t data_alloc_len;
+       char *data;
        uint16_t len;
-       char data[0];
+       char code[0];
 };
 
 enum entry_type {
        REG_S64,
        REG_DOUBLE,
        REG_STRING,
+       REG_STAR_GLOB_STRING,
        REG_UNKNOWN,
+       REG_PTR,
+};
+
+enum load_type {
+       LOAD_ROOT_CONTEXT,
+       LOAD_ROOT_APP_CONTEXT,
+       LOAD_ROOT_PAYLOAD,
+       LOAD_OBJECT,
+};
+
+enum object_type {
+       OBJECT_TYPE_S8,
+       OBJECT_TYPE_S16,
+       OBJECT_TYPE_S32,
+       OBJECT_TYPE_S64,
+       OBJECT_TYPE_U8,
+       OBJECT_TYPE_U16,
+       OBJECT_TYPE_U32,
+       OBJECT_TYPE_U64,
+
+       OBJECT_TYPE_DOUBLE,
+       OBJECT_TYPE_STRING,
+       OBJECT_TYPE_STRING_SEQUENCE,
+
+       OBJECT_TYPE_SEQUENCE,
+       OBJECT_TYPE_ARRAY,
+       OBJECT_TYPE_STRUCT,
+       OBJECT_TYPE_VARIANT,
+
+       OBJECT_TYPE_DYNAMIC,
+};
+
+struct filter_get_index_data {
+       uint64_t offset;        /* in bytes */
+       size_t ctx_index;
+       size_t array_len;
+       struct {
+               size_t len;
+               enum object_type type;
+               bool rev_bo;    /* reverse byte order */
+       } elem;
 };
 
 /* Validation stack */
+struct vstack_load {
+       enum load_type type;
+       enum object_type object_type;
+       const struct lttng_event_field *field;
+       bool rev_bo;    /* reverse byte order */
+};
+
 struct vstack_entry {
        enum entry_type type;
+       struct vstack_load load;
 };
 
 struct vstack {
@@ -141,6 +196,30 @@ int vstack_pop(struct vstack *stack)
 }
 
 /* Execution stack */
+enum estack_string_literal_type {
+       ESTACK_STRING_LITERAL_TYPE_NONE,
+       ESTACK_STRING_LITERAL_TYPE_PLAIN,
+       ESTACK_STRING_LITERAL_TYPE_STAR_GLOB,
+};
+
+struct load_ptr {
+       enum load_type type;
+       enum object_type object_type;
+       const void *ptr;
+       bool rev_bo;
+       /* Temporary place-holders for contexts. */
+       union {
+               int64_t s64;
+               uint64_t u64;
+               double d;
+       } u;
+       /*
+        * "field" is only needed when nested under a variant, in which
+        * case we cannot specialize the nested operations.
+        */
+       const struct lttng_event_field *field;
+};
+
 struct estack_entry {
        enum entry_type type;   /* For dynamic typing. */
        union {
@@ -150,8 +229,9 @@ struct estack_entry {
                struct {
                        const char *str;
                        size_t seq_len;
-                       int literal;            /* is string literal ? */
+                       enum estack_string_literal_type literal_type;
                } s;
+               struct load_ptr ptr;
        } u;
 };
 
@@ -210,7 +290,8 @@ struct estack {
 const char *print_op(enum filter_op op);
 
 int lttng_filter_validate_bytecode(struct bytecode_runtime *bytecode);
-int lttng_filter_specialize_bytecode(struct bytecode_runtime *bytecode);
+int lttng_filter_specialize_bytecode(struct lttng_event *event,
+               struct bytecode_runtime *bytecode);
 
 uint64_t lttng_filter_false(void *filter_data,
                const char *filter_stack_data);