Filter: index array, sequences, implement bitwise binary operators

[lttng-modules.git] / lttng-filter.h

diff --git a/lttng-filter.h b/lttng-filter.h
index 01bafa05f645aa10fbb8d768eadf28cc748ee1a4..3fba528e25a58a3d5da85aae8ace95342b932345 100644 (file)
--- a/lttng-filter.h
+++ b/lttng-filter.h
@@ -36,6 +36,8 @@
 #define FILTER_STACK_LEN       10      /* includes 2 dummy */
 #define FILTER_STACK_EMPTY     1
 
+#define FILTER_MAX_DATA_LEN    65536
+
 #ifdef DEBUG
 #define dbg_printk(fmt, args...)                               \
        printk(KERN_DEBUG "[debug bytecode in %s:%s@%u] " fmt,          \
@@ -53,8 +55,11 @@ 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 {
@@ -63,11 +68,60 @@ enum entry_type {
        REG_STRING,
        REG_STAR_GLOB_STRING,
        REG_TYPE_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 {
@@ -126,6 +180,24 @@ enum estack_string_literal_type {
        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 {
        union {
                int64_t v;
@@ -137,6 +209,7 @@ struct estack_entry {
                        enum estack_string_literal_type literal_type;
                        int user;               /* is string from userspace ? */
                } s;
+               struct load_ptr ptr;
        } u;
 };
 
@@ -179,7 +252,8 @@ struct estack {
 const char *lttng_filter_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,
                struct lttng_probe_ctx *lttng_probe_ctx,