Add indirection for visitor arguments
[libside.git] / src / tracer.c
index a0adea93b7501402cfa19da0a5462c7900176019..e4ccd86950ac0efbe36ffde2cf9768abb50a410e 100644 (file)
@@ -9,6 +9,7 @@
 #include <stdio.h>
 #include <stdbool.h>
 #include <string.h>
+#include <iconv.h>
 
 #include <side/trace.h>
 
@@ -19,33 +20,198 @@ enum tracer_display_base {
        TRACER_DISPLAY_BASE_16,
 };
 
+union int_value {
+       uint64_t u[NR_SIDE_INTEGER128_SPLIT];
+       int64_t s[NR_SIDE_INTEGER128_SPLIT];
+};
+
 static struct side_tracer_handle *tracer_handle;
 
 static
-void tracer_print_struct(const struct side_type_description *type_desc, const struct side_arg_vec_description *sav_desc);
+void tracer_print_struct(const struct side_type *type_desc, const struct side_arg_vec *side_arg_vec);
+static
+void tracer_print_variant(const struct side_type *type_desc, const struct side_arg_variant *side_arg_variant);
+static
+void tracer_print_array(const struct side_type *type_desc, const struct side_arg_vec *side_arg_vec);
+static
+void tracer_print_vla(const struct side_type *type_desc, const struct side_arg_vec *side_arg_vec);
+static
+void tracer_print_vla_visitor(const struct side_type *type_desc, struct side_arg_vla_visitor *vla_visitor);
+static
+void tracer_print_dynamic(const struct side_arg *dynamic_item);
+static
+uint32_t tracer_print_gather_bool_type(const struct side_type_gather *type_gather, const void *_ptr);
 static
-void tracer_print_struct_sg(const struct side_type_description *type_desc, void *ptr);
+uint32_t tracer_print_gather_byte_type(const struct side_type_gather *type_gather, const void *_ptr);
 static
-void tracer_print_array(const struct side_type_description *type_desc, const struct side_arg_vec_description *sav_desc);
+uint32_t tracer_print_gather_integer_type(const struct side_type_gather *type_gather, const void *_ptr,
+               enum tracer_display_base default_base);
 static
-void tracer_print_vla(const struct side_type_description *type_desc, const struct side_arg_vec_description *sav_desc);
+uint32_t tracer_print_gather_float_type(const struct side_type_gather *type_gather, const void *_ptr);
 static
-void tracer_print_vla_visitor(const struct side_type_description *type_desc, void *app_ctx);
+uint32_t tracer_print_gather_string_type(const struct side_type_gather *type_gather, const void *_ptr);
 static
-void tracer_print_array_fixint(const struct side_type_description *type_desc, const struct side_arg_vec *item);
+uint32_t tracer_print_gather_enum_type(const struct side_type_gather *type_gather, const void *_ptr);
+static
+uint32_t tracer_print_gather_struct(const struct side_type_gather *type_gather, const void *_ptr);
+static
+uint32_t tracer_print_gather_array(const struct side_type_gather *type_gather, const void *_ptr);
+static
+uint32_t tracer_print_gather_vla(const struct side_type_gather *type_gather, const void *_ptr,
+               const void *_length_ptr);
+static
+void tracer_print_type(const struct side_type *type_desc, const struct side_arg *item);
+
+static
+void tracer_convert_string_to_utf8(const void *p, uint8_t unit_size, enum side_type_label_byte_order byte_order,
+               size_t *strlen_with_null,
+               char **output_str)
+{
+       size_t ret, inbytesleft = 0, outbytesleft, bufsize;
+       const char *str = p, *fromcode;
+       char *inbuf = (char *) p, *outbuf, *buf;
+       iconv_t cd;
+
+       switch (unit_size) {
+       case 1:
+               if (strlen_with_null)
+                       *strlen_with_null = strlen(str) + 1;
+               *output_str = (char *) str;
+               return;
+       case 2:
+       {
+               const uint16_t *p16 = p;
+
+               switch (byte_order) {
+               case SIDE_TYPE_BYTE_ORDER_LE:
+               {
+                       fromcode = "UTF-16LE";
+                       break;
+               }
+               case SIDE_TYPE_BYTE_ORDER_BE:
+               {
+                       fromcode = "UTF-16BE";
+                       break;
+               }
+               default:
+                       fprintf(stderr, "Unknown byte order\n");
+                       abort();
+               }
+               for (; *p16; p16++)
+                       inbytesleft += 2;
+               /*
+                * Worse case is U+FFFF UTF-16 (2 bytes) converting to
+                * { ef, bf, bf } UTF-8 (3 bytes).
+                */
+               bufsize = inbytesleft / 2 * 3 + 1;
+               break;
+       }
+       case 4:
+       {
+               const uint32_t *p32 = p;
+
+               switch (byte_order) {
+               case SIDE_TYPE_BYTE_ORDER_LE:
+               {
+                       fromcode = "UTF-32LE";
+                       break;
+               }
+               case SIDE_TYPE_BYTE_ORDER_BE:
+               {
+                       fromcode = "UTF-32BE";
+                       break;
+               }
+               default:
+                       fprintf(stderr, "Unknown byte order\n");
+                       abort();
+               }
+               for (; *p32; p32++)
+                       inbytesleft += 4;
+               /*
+                * Each 4-byte UTF-32 character converts to at most a
+                * 4-byte UTF-8 character.
+                */
+               bufsize = inbytesleft + 1;
+               break;
+       }
+       default:
+               fprintf(stderr, "Unknown string unit size %" PRIu8 "\n", unit_size);
+               abort();
+       }
+
+       cd = iconv_open("UTF8", fromcode);
+       if (cd == (iconv_t) -1) {
+               perror("iconv_open");
+               abort();
+       }
+       buf = malloc(bufsize);
+       if (!buf) {
+               abort();
+       }
+       outbuf = (char *) buf;
+       outbytesleft = bufsize;
+       ret = iconv(cd, &inbuf, &inbytesleft, &outbuf, &outbytesleft);
+       if (ret == (size_t) -1) {
+               perror("iconv");
+               abort();
+       }
+       if (inbytesleft) {
+               fprintf(stderr, "Buffer too small to convert string input\n");
+               abort();
+       }
+       (*outbuf++) = '\0';
+       if (iconv_close(cd) == -1) {
+               perror("iconv_close");
+               abort();
+       }
+       if (strlen_with_null)
+               *strlen_with_null = outbuf - buf;
+       *output_str = buf;
+}
+
 static
-void tracer_print_vla_fixint(const struct side_type_description *type_desc, const struct side_arg_vec *item);
+void tracer_print_string(const void *p, uint8_t unit_size, enum side_type_label_byte_order byte_order,
+               size_t *strlen_with_null)
+{
+       char *output_str = NULL;
+
+       tracer_convert_string_to_utf8(p, unit_size, byte_order, strlen_with_null, &output_str);
+       printf("\"%s\"", output_str);
+       if (output_str != p)
+               free(output_str);
+}
+
 static
-void tracer_print_dynamic(const struct side_arg_dynamic_vec *dynamic_item);
+void side_check_value_u64(union int_value v)
+{
+       if (v.u[SIDE_INTEGER128_SPLIT_HIGH]) {
+               fprintf(stderr, "Unexpected integer value\n");
+               abort();
+       }
+}
+
 static
-void tracer_print_type(const struct side_type_description *type_desc, const struct side_arg_vec *item);
+void side_check_value_s64(union int_value v)
+{
+       if (v.s[SIDE_INTEGER128_SPLIT_LOW] & (1ULL << 63)) {
+               if (v.s[SIDE_INTEGER128_SPLIT_HIGH] != ~0LL) {
+                       fprintf(stderr, "Unexpected integer value\n");
+                       abort();
+               }
+       } else {
+               if (v.s[SIDE_INTEGER128_SPLIT_HIGH]) {
+                       fprintf(stderr, "Unexpected integer value\n");
+                       abort();
+               }
+       }
+}
 
 static
-int64_t get_attr_integer_value(const struct side_attr *attr)
+int64_t get_attr_integer64_value(const struct side_attr *attr)
 {
        int64_t val;
 
-       switch (attr->value.type) {
+       switch (side_enum_get(attr->value.type)) {
        case SIDE_ATTR_TYPE_U8:
                val = attr->value.u.integer_value.side_u8;
                break;
@@ -58,6 +224,18 @@ int64_t get_attr_integer_value(const struct side_attr *attr)
        case SIDE_ATTR_TYPE_U64:
                val = attr->value.u.integer_value.side_u64;
                break;
+       case SIDE_ATTR_TYPE_U128:
+       {
+               union int_value v = {
+                       .u = {
+                               [SIDE_INTEGER128_SPLIT_LOW] = attr->value.u.integer_value.side_u128_split[SIDE_INTEGER128_SPLIT_LOW],
+                               [SIDE_INTEGER128_SPLIT_HIGH] = attr->value.u.integer_value.side_u128_split[SIDE_INTEGER128_SPLIT_HIGH],
+                       },
+               };
+               side_check_value_u64(v);
+               val = v.u[SIDE_INTEGER128_SPLIT_LOW];
+               break;
+       }
        case SIDE_ATTR_TYPE_S8:
                val = attr->value.u.integer_value.side_s8;
                break;
@@ -70,6 +248,18 @@ int64_t get_attr_integer_value(const struct side_attr *attr)
        case SIDE_ATTR_TYPE_S64:
                val = attr->value.u.integer_value.side_s64;
                break;
+       case SIDE_ATTR_TYPE_S128:
+       {
+               union int_value v = {
+                       .s = {
+                               [SIDE_INTEGER128_SPLIT_LOW] = attr->value.u.integer_value.side_s128_split[SIDE_INTEGER128_SPLIT_LOW],
+                               [SIDE_INTEGER128_SPLIT_HIGH] = attr->value.u.integer_value.side_s128_split[SIDE_INTEGER128_SPLIT_HIGH],
+                       },
+               };
+               side_check_value_s64(v);
+               val = v.s[SIDE_INTEGER128_SPLIT_LOW];
+               break;
+       }
        default:
                fprintf(stderr, "Unexpected attribute type\n");
                abort();
@@ -78,15 +268,23 @@ int64_t get_attr_integer_value(const struct side_attr *attr)
 }
 
 static
-enum tracer_display_base get_attr_display_base(const struct side_attr *_attr, uint32_t nr_attr)
+enum tracer_display_base get_attr_display_base(const struct side_attr *_attr, uint32_t nr_attr,
+                               enum tracer_display_base default_base)
 {
        uint32_t i;
 
        for (i = 0; i < nr_attr; i++) {
                const struct side_attr *attr = &_attr[i];
+               char *utf8_str = NULL;
+               bool cmp;
 
-               if (!strcmp(attr->key, "std.integer.base")) {
-                       int64_t val = get_attr_integer_value(attr);
+               tracer_convert_string_to_utf8(side_ptr_get(attr->key.p), attr->key.unit_size,
+                       side_enum_get(attr->key.byte_order), NULL, &utf8_str);
+               cmp = strcmp(utf8_str, "std.integer.base");
+               if (utf8_str != side_ptr_get(attr->key.p))
+                       free(utf8_str);
+               if (!cmp) {
+                       int64_t val = get_attr_integer64_value(attr);
 
                        switch (val) {
                        case 2:
@@ -103,110 +301,22 @@ enum tracer_display_base get_attr_display_base(const struct side_attr *_attr, ui
                        }
                }
        }
-       return TRACER_DISPLAY_BASE_10;  /* Default */
-}
-
-static
-bool type_to_host_reverse_bo(const struct side_type_description *type_desc)
-{
-       switch (type_desc->type) {
-       case SIDE_TYPE_U8:
-       case SIDE_TYPE_S8:
-       case SIDE_TYPE_BYTE:
-               return false;
-        case SIDE_TYPE_U16:
-        case SIDE_TYPE_U32:
-        case SIDE_TYPE_U64:
-        case SIDE_TYPE_S16:
-        case SIDE_TYPE_S32:
-        case SIDE_TYPE_S64:
-               if (type_desc->u.side_integer.byte_order != SIDE_TYPE_BYTE_ORDER_HOST)
-                       return true;
-               else
-                       return false;
-               break;
-        case SIDE_TYPE_POINTER32:
-        case SIDE_TYPE_POINTER64:
-               if (type_desc->u.side_integer.byte_order != SIDE_TYPE_BYTE_ORDER_HOST)
-                       return true;
-               else
-                       return false;
-               break;
-        case SIDE_TYPE_FLOAT_BINARY16:
-        case SIDE_TYPE_FLOAT_BINARY32:
-        case SIDE_TYPE_FLOAT_BINARY64:
-        case SIDE_TYPE_FLOAT_BINARY128:
-               if (type_desc->u.side_float.byte_order != SIDE_TYPE_FLOAT_WORD_ORDER_HOST)
-                       return true;
-               else
-                       return false;
-               break;
-       default:
-               fprintf(stderr, "Unexpected type\n");
-               abort();
-       }
-}
-
-static
-bool sg_type_to_host_reverse_bo(const struct side_type_sg_description *sg_type)
-{
-       switch (sg_type->type) {
-       case SIDE_TYPE_SG_UNSIGNED_INT:
-       case SIDE_TYPE_SG_SIGNED_INT:
-               if (sg_type->u.side_basic.byte_order != SIDE_TYPE_BYTE_ORDER_HOST)
-                       return true;
-               else
-                       return false;
-               break;
-       default:
-               fprintf(stderr, "Unexpected type\n");
-               abort();
-       }
-}
-
-static
-bool dynamic_type_to_host_reverse_bo(const struct side_arg_dynamic_vec *item)
-{
-       switch (item->dynamic_type) {
-       case SIDE_DYNAMIC_TYPE_U8:
-       case SIDE_DYNAMIC_TYPE_S8:
-       case SIDE_DYNAMIC_TYPE_BYTE:
-               return false;
-        case SIDE_DYNAMIC_TYPE_U16:
-        case SIDE_DYNAMIC_TYPE_U32:
-        case SIDE_DYNAMIC_TYPE_U64:
-        case SIDE_DYNAMIC_TYPE_S16:
-        case SIDE_DYNAMIC_TYPE_S32:
-        case SIDE_DYNAMIC_TYPE_S64:
-        case SIDE_DYNAMIC_TYPE_POINTER32:
-        case SIDE_DYNAMIC_TYPE_POINTER64:
-               if (item->u.side_integer.type.byte_order != SIDE_TYPE_BYTE_ORDER_HOST)
-                       return true;
-               else
-                       return false;
-               break;
-        case SIDE_DYNAMIC_TYPE_FLOAT_BINARY16:
-        case SIDE_DYNAMIC_TYPE_FLOAT_BINARY32:
-        case SIDE_DYNAMIC_TYPE_FLOAT_BINARY64:
-        case SIDE_DYNAMIC_TYPE_FLOAT_BINARY128:
-               if (item->u.side_float.type.byte_order != SIDE_TYPE_FLOAT_WORD_ORDER_HOST)
-                       return true;
-               else
-                       return false;
-               break;
-       default:
-               fprintf(stderr, "Unexpected type\n");
-               abort();
-       }
+       return default_base;    /* Default */
 }
 
 static
 void tracer_print_attr_type(const char *separator, const struct side_attr *attr)
 {
-       printf("{ key%s \"%s\", value%s ", separator, attr->key, separator);
-       switch (attr->value.type) {
+       char *utf8_str = NULL;
+
+       tracer_convert_string_to_utf8(side_ptr_get(attr->key.p), attr->key.unit_size,
+               side_enum_get(attr->key.byte_order), NULL, &utf8_str);
+       printf("{ key%s \"%s\", value%s ", separator, utf8_str, separator);
+       if (utf8_str != side_ptr_get(attr->key.p))
+               free(utf8_str);
+       switch (side_enum_get(attr->value.type)) {
        case SIDE_ATTR_TYPE_BOOL:
-               printf("%s", attr->value.u.side_bool ? "true" : "false");
+               printf("%s", attr->value.u.bool_value ? "true" : "false");
                break;
        case SIDE_ATTR_TYPE_U8:
                printf("%" PRIu8, attr->value.u.integer_value.side_u8);
@@ -220,6 +330,15 @@ void tracer_print_attr_type(const char *separator, const struct side_attr *attr)
        case SIDE_ATTR_TYPE_U64:
                printf("%" PRIu64, attr->value.u.integer_value.side_u64);
                break;
+       case SIDE_ATTR_TYPE_U128:
+               if (attr->value.u.integer_value.side_u128_split[SIDE_INTEGER128_SPLIT_HIGH] == 0) {
+                       printf("0x%" PRIx64, attr->value.u.integer_value.side_u128_split[SIDE_INTEGER128_SPLIT_LOW]);
+               } else {
+                       printf("0x%" PRIx64 "%016" PRIx64,
+                               attr->value.u.integer_value.side_u128_split[SIDE_INTEGER128_SPLIT_HIGH],
+                               attr->value.u.integer_value.side_u128_split[SIDE_INTEGER128_SPLIT_LOW]);
+               }
+               break;
        case SIDE_ATTR_TYPE_S8:
                printf("%" PRId8, attr->value.u.integer_value.side_s8);
                break;
@@ -232,11 +351,14 @@ void tracer_print_attr_type(const char *separator, const struct side_attr *attr)
        case SIDE_ATTR_TYPE_S64:
                printf("%" PRId64, attr->value.u.integer_value.side_s64);
                break;
-       case SIDE_ATTR_TYPE_POINTER32:
-               printf("0x%" PRIx32, attr->value.u.integer_value.side_u32);
-               break;
-       case SIDE_ATTR_TYPE_POINTER64:
-               printf("0x%" PRIx64, attr->value.u.integer_value.side_u64);
+       case SIDE_ATTR_TYPE_S128:
+               if (attr->value.u.integer_value.side_s128_split[SIDE_INTEGER128_SPLIT_HIGH] == 0) {
+                       printf("0x%" PRIx64, attr->value.u.integer_value.side_s128_split[SIDE_INTEGER128_SPLIT_LOW]);
+               } else {
+                       printf("0x%" PRIx64 "%016" PRIx64,
+                               attr->value.u.integer_value.side_s128_split[SIDE_INTEGER128_SPLIT_HIGH],
+                               attr->value.u.integer_value.side_s128_split[SIDE_INTEGER128_SPLIT_LOW]);
+               }
                break;
        case SIDE_ATTR_TYPE_FLOAT_BINARY16:
 #if __HAVE_FLOAT16
@@ -271,7 +393,9 @@ void tracer_print_attr_type(const char *separator, const struct side_attr *attr)
                abort();
 #endif
        case SIDE_ATTR_TYPE_STRING:
-               printf("\"%s\"", (const char *)(uintptr_t) attr->value.u.string);
+               tracer_print_string(side_ptr_get(attr->value.u.string_value.p),
+                               attr->value.u.string_value.unit_size,
+                               side_enum_get(attr->value.u.string_value.byte_order), NULL);
                break;
        default:
                fprintf(stderr, "ERROR: <UNKNOWN ATTRIBUTE TYPE>");
@@ -284,7 +408,7 @@ static
 void print_attributes(const char *prefix_str, const char *separator,
                const struct side_attr *attr, uint32_t nr_attr)
 {
-       int i;
+       uint32_t i;
 
        if (!nr_attr)
                return;
@@ -297,103 +421,154 @@ void print_attributes(const char *prefix_str, const char *separator,
 }
 
 static
-void print_enum(const struct side_type_description *type_desc, const struct side_arg_vec *item)
+union int_value tracer_load_integer_value(const struct side_type_integer *type_integer,
+               const union side_integer_value *value,
+               uint16_t offset_bits, uint16_t *_len_bits)
 {
-       const struct side_enum_mappings *mappings = type_desc->u.side_enum.mappings;
-       const struct side_type_description *elem_type = type_desc->u.side_enum.elem_type;
-       int i, print_count = 0;
-       int64_t value;
+       union int_value v = {};
+       uint16_t len_bits;
+       bool reverse_bo;
 
-       if (elem_type->type != item->type) {
-               fprintf(stderr, "ERROR: Unexpected enum element type\n");
+       if (!type_integer->len_bits)
+               len_bits = type_integer->integer_size * CHAR_BIT;
+       else
+               len_bits = type_integer->len_bits;
+       if (len_bits + offset_bits > type_integer->integer_size * CHAR_BIT)
                abort();
-       }
-       switch (item->type) {
-       case SIDE_TYPE_U8:
-               value = (int64_t) item->u.integer_value.side_u8;
+       reverse_bo = side_enum_get(type_integer->byte_order) != SIDE_TYPE_BYTE_ORDER_HOST;
+       switch (type_integer->integer_size) {
+       case 1:
+               if (type_integer->signedness)
+                       v.s[SIDE_INTEGER128_SPLIT_LOW] = value->side_s8;
+               else
+                       v.u[SIDE_INTEGER128_SPLIT_LOW] = value->side_u8;
                break;
-       case SIDE_TYPE_U16:
-       {
-               uint16_t v;
+       case 2:
+               if (type_integer->signedness) {
+                       int16_t side_s16;
 
-               v = item->u.integer_value.side_u16;
-               if (type_to_host_reverse_bo(elem_type))
-                       v = side_bswap_16(v);
-               value = (int64_t) v;
-               break;
-       }
-       case SIDE_TYPE_U32:
-       {
-               uint32_t v;
+                       side_s16 = value->side_s16;
+                       if (reverse_bo)
+                               side_s16 = side_bswap_16(side_s16);
+                       v.s[SIDE_INTEGER128_SPLIT_LOW] = side_s16;
+               } else {
+                       uint16_t side_u16;
 
-               v = item->u.integer_value.side_u32;
-               if (type_to_host_reverse_bo(elem_type))
-                       v = side_bswap_32(v);
-               value = (int64_t) v;
+                       side_u16 = value->side_u16;
+                       if (reverse_bo)
+                               side_u16 = side_bswap_16(side_u16);
+                       v.u[SIDE_INTEGER128_SPLIT_LOW] = side_u16;
+               }
                break;
-       }
-       case SIDE_TYPE_U64:
-       {
-               uint64_t v;
+       case 4:
+               if (type_integer->signedness) {
+                       int32_t side_s32;
 
-               v = item->u.integer_value.side_u64;
-               if (type_to_host_reverse_bo(elem_type))
-                       v = side_bswap_64(v);
-               value = (int64_t) v;
-               break;
-       }
-       case SIDE_TYPE_S8:
-               value = (int64_t) item->u.integer_value.side_s8;
-               break;
-       case SIDE_TYPE_S16:
-       {
-               int16_t v;
+                       side_s32 = value->side_s32;
+                       if (reverse_bo)
+                               side_s32 = side_bswap_32(side_s32);
+                       v.s[SIDE_INTEGER128_SPLIT_LOW] = side_s32;
+               } else {
+                       uint32_t side_u32;
 
-               v = item->u.integer_value.side_s16;
-               if (type_to_host_reverse_bo(elem_type))
-                       v = side_bswap_16(v);
-               value = (int64_t) v;
+                       side_u32 = value->side_u32;
+                       if (reverse_bo)
+                               side_u32 = side_bswap_32(side_u32);
+                       v.u[SIDE_INTEGER128_SPLIT_LOW] = side_u32;
+               }
                break;
-       }
-       case SIDE_TYPE_S32:
-       {
-               int32_t v;
+       case 8:
+               if (type_integer->signedness) {
+                       int64_t side_s64;
 
-               v = item->u.integer_value.side_s32;
-               if (type_to_host_reverse_bo(elem_type))
-                       v = side_bswap_32(v);
-               value = (int64_t) v;
-               break;
-       }
-       case SIDE_TYPE_S64:
-       {
-               int64_t v;
+                       side_s64 = value->side_s64;
+                       if (reverse_bo)
+                               side_s64 = side_bswap_64(side_s64);
+                       v.s[SIDE_INTEGER128_SPLIT_LOW] = side_s64;
+               } else {
+                       uint64_t side_u64;
 
-               v = item->u.integer_value.side_s64;
-               if (type_to_host_reverse_bo(elem_type))
-                       v = side_bswap_64(v);
-               value = v;
+                       side_u64 = value->side_u64;
+                       if (reverse_bo)
+                               side_u64 = side_bswap_64(side_u64);
+                       v.u[SIDE_INTEGER128_SPLIT_LOW] = side_u64;
+               }
+               break;
+       case 16:
+               if (type_integer->signedness) {
+                       int64_t side_s64[NR_SIDE_INTEGER128_SPLIT];
+
+                       side_s64[SIDE_INTEGER128_SPLIT_LOW] = value->side_s128_split[SIDE_INTEGER128_SPLIT_LOW];
+                       side_s64[SIDE_INTEGER128_SPLIT_HIGH] = value->side_s128_split[SIDE_INTEGER128_SPLIT_HIGH];
+                       if (reverse_bo) {
+                               side_s64[SIDE_INTEGER128_SPLIT_LOW] = side_bswap_64(side_s64[SIDE_INTEGER128_SPLIT_LOW]);
+                               side_s64[SIDE_INTEGER128_SPLIT_HIGH] = side_bswap_64(side_s64[SIDE_INTEGER128_SPLIT_HIGH]);
+                               v.s[SIDE_INTEGER128_SPLIT_LOW] = side_s64[SIDE_INTEGER128_SPLIT_HIGH];
+                               v.s[SIDE_INTEGER128_SPLIT_HIGH] = side_s64[SIDE_INTEGER128_SPLIT_LOW];
+                       } else {
+                               v.s[SIDE_INTEGER128_SPLIT_LOW] = side_s64[SIDE_INTEGER128_SPLIT_LOW];
+                               v.s[SIDE_INTEGER128_SPLIT_HIGH] = side_s64[SIDE_INTEGER128_SPLIT_HIGH];
+                       }
+               } else {
+                       uint64_t side_u64[NR_SIDE_INTEGER128_SPLIT];
+
+                       side_u64[SIDE_INTEGER128_SPLIT_LOW] = value->side_u128_split[SIDE_INTEGER128_SPLIT_LOW];
+                       side_u64[SIDE_INTEGER128_SPLIT_HIGH] = value->side_u128_split[SIDE_INTEGER128_SPLIT_HIGH];
+                       if (reverse_bo) {
+                               side_u64[SIDE_INTEGER128_SPLIT_LOW] = side_bswap_64(side_u64[SIDE_INTEGER128_SPLIT_LOW]);
+                               side_u64[SIDE_INTEGER128_SPLIT_HIGH] = side_bswap_64(side_u64[SIDE_INTEGER128_SPLIT_HIGH]);
+                               v.u[SIDE_INTEGER128_SPLIT_LOW] = side_u64[SIDE_INTEGER128_SPLIT_HIGH];
+                               v.u[SIDE_INTEGER128_SPLIT_HIGH] = side_u64[SIDE_INTEGER128_SPLIT_LOW];
+                       } else {
+                               v.u[SIDE_INTEGER128_SPLIT_LOW] = side_u64[SIDE_INTEGER128_SPLIT_LOW];
+                               v.u[SIDE_INTEGER128_SPLIT_HIGH] = side_u64[SIDE_INTEGER128_SPLIT_HIGH];
+                       }
+               }
                break;
-       }
        default:
-               fprintf(stderr, "ERROR: Unexpected enum element type\n");
                abort();
        }
-       print_attributes("attr", ":", mappings->attr, mappings->nr_attr);
-       printf("%s", mappings->nr_attr ? ", " : "");
-       tracer_print_type(type_desc->u.side_enum.elem_type, item);
+       if (type_integer->integer_size <= 8) {
+               v.u[SIDE_INTEGER128_SPLIT_LOW] >>= offset_bits;
+               if (len_bits < 64) {
+                       v.u[SIDE_INTEGER128_SPLIT_LOW] &= (1ULL << len_bits) - 1;
+                       if (type_integer->signedness) {
+                               /* Sign-extend. */
+                               if (v.u[SIDE_INTEGER128_SPLIT_LOW] & (1ULL << (len_bits - 1))) {
+                                       v.u[SIDE_INTEGER128_SPLIT_LOW] |= ~((1ULL << len_bits) - 1);
+                                       v.u[SIDE_INTEGER128_SPLIT_HIGH] = ~0ULL;
+                               }
+                       }
+               }
+       } else {
+               //TODO: Implement 128-bit integer with len_bits != 128 or nonzero offset_bits
+               if (len_bits < 128 || offset_bits != 0)
+                       abort();
+       }
+       if (_len_bits)
+               *_len_bits = len_bits;
+       return v;
+}
+
+static
+void print_enum_labels(const struct side_enum_mappings *mappings, union int_value v)
+{
+       uint32_t i, print_count = 0;
+
+       side_check_value_s64(v);
        printf(", labels: [ ");
        for (i = 0; i < mappings->nr_mappings; i++) {
-               const struct side_enum_mapping *mapping = &mappings->mappings[i];
+               const struct side_enum_mapping *mapping = &side_ptr_get(mappings->mappings)[i];
 
                if (mapping->range_end < mapping->range_begin) {
                        fprintf(stderr, "ERROR: Unexpected enum range: %" PRIu64 "-%" PRIu64 "\n",
                                mapping->range_begin, mapping->range_end);
                        abort();
                }
-               if (value >= mapping->range_begin && value <= mapping->range_end) {
+               if (v.s[SIDE_INTEGER128_SPLIT_LOW] >= mapping->range_begin && v.s[SIDE_INTEGER128_SPLIT_LOW] <= mapping->range_end) {
                        printf("%s", print_count++ ? ", " : "");
-                       printf("\"%s\"", mapping->label);
+                       tracer_print_string(side_ptr_get(mapping->label.p), mapping->label.unit_size,
+                               side_enum_get(mapping->label.byte_order), NULL);
                }
        }
        if (!print_count)
@@ -402,75 +577,98 @@ void print_enum(const struct side_type_description *type_desc, const struct side
 }
 
 static
-uint32_t enum_elem_type_to_stride(const struct side_type_description *elem_type)
+void tracer_print_enum(const struct side_type *type_desc, const struct side_arg *item)
+{
+       const struct side_enum_mappings *mappings = side_ptr_get(type_desc->u.side_enum.mappings);
+       const struct side_type *elem_type = side_ptr_get(type_desc->u.side_enum.elem_type);
+       union int_value v;
+
+       if (side_enum_get(elem_type->type) != side_enum_get(item->type)) {
+               fprintf(stderr, "ERROR: Unexpected enum element type\n");
+               abort();
+       }
+       v = tracer_load_integer_value(&elem_type->u.side_integer,
+                       &item->u.side_static.integer_value, 0, NULL);
+       print_attributes("attr", ":", side_ptr_get(mappings->attr), mappings->nr_attr);
+       printf("%s", mappings->nr_attr ? ", " : "");
+       tracer_print_type(elem_type, item);
+       print_enum_labels(mappings, v);
+}
+
+static
+uint32_t elem_type_to_stride(const struct side_type *elem_type)
 {
        uint32_t stride_bit;
 
-       switch (elem_type->type) {
-       case SIDE_TYPE_U8:      /* Fall-through */
+       switch (side_enum_get(elem_type->type)) {
        case SIDE_TYPE_BYTE:
                stride_bit = 8;
                break;
+
+       case SIDE_TYPE_U8:
        case SIDE_TYPE_U16:
-               stride_bit = 16;
-               break;
        case SIDE_TYPE_U32:
-               stride_bit = 32;
-               break;
        case SIDE_TYPE_U64:
-               stride_bit = 64;
-               break;
+       case SIDE_TYPE_U128:
+       case SIDE_TYPE_S8:
+       case SIDE_TYPE_S16:
+       case SIDE_TYPE_S32:
+       case SIDE_TYPE_S64:
+       case SIDE_TYPE_S128:
+               return elem_type->u.side_integer.integer_size * CHAR_BIT;
        default:
-               fprintf(stderr, "ERROR: Unexpected enum element type\n");
+               fprintf(stderr, "ERROR: Unexpected enum bitmap element type\n");
                abort();
        }
        return stride_bit;
 }
 
 static
-void print_enum_bitmap(const struct side_type_description *type_desc,
-               const struct side_arg_vec *item)
+void tracer_print_enum_bitmap(const struct side_type *type_desc,
+               const struct side_arg *item)
 {
-       const struct side_type_description *elem_type = type_desc->u.side_enum_bitmap.elem_type;
-       const struct side_enum_bitmap_mappings *side_enum_mappings = type_desc->u.side_enum_bitmap.mappings;
-       int i, print_count = 0;
-       uint32_t stride_bit, nr_items;
-       bool reverse_byte_order = false;
-       const struct side_arg_vec *array_item;
-
-       switch (elem_type->type) {
+       const struct side_enum_bitmap_mappings *side_enum_mappings = side_ptr_get(type_desc->u.side_enum_bitmap.mappings);
+       const struct side_type *enum_elem_type = side_ptr_get(type_desc->u.side_enum_bitmap.elem_type), *elem_type;
+       uint32_t i, print_count = 0, stride_bit, nr_items;
+       const struct side_arg *array_item;
+
+       switch (side_enum_get(enum_elem_type->type)) {
        case SIDE_TYPE_U8:              /* Fall-through */
        case SIDE_TYPE_BYTE:            /* Fall-through */
        case SIDE_TYPE_U16:             /* Fall-through */
        case SIDE_TYPE_U32:             /* Fall-through */
-       case SIDE_TYPE_U64:
-               stride_bit = enum_elem_type_to_stride(elem_type);
-               reverse_byte_order = type_to_host_reverse_bo(elem_type);
+       case SIDE_TYPE_U64:             /* Fall-through */
+       case SIDE_TYPE_U128:            /* Fall-through */
+       case SIDE_TYPE_S8:              /* Fall-through */
+       case SIDE_TYPE_S16:             /* Fall-through */
+       case SIDE_TYPE_S32:             /* Fall-through */
+       case SIDE_TYPE_S64:             /* Fall-through */
+       case SIDE_TYPE_S128:
+               elem_type = enum_elem_type;
                array_item = item;
                nr_items = 1;
                break;
        case SIDE_TYPE_ARRAY:
-               stride_bit = enum_elem_type_to_stride(elem_type->u.side_array.elem_type);
-               reverse_byte_order = type_to_host_reverse_bo(elem_type->u.side_array.elem_type);
-               array_item = item->u.side_array->sav;
+               elem_type = side_ptr_get(enum_elem_type->u.side_array.elem_type);
+               array_item = side_ptr_get(side_ptr_get(item->u.side_static.side_array)->sav);
                nr_items = type_desc->u.side_array.length;
                break;
        case SIDE_TYPE_VLA:
-               stride_bit = enum_elem_type_to_stride(elem_type->u.side_vla.elem_type);
-               reverse_byte_order = type_to_host_reverse_bo(elem_type->u.side_vla.elem_type);
-               array_item = item->u.side_vla->sav;
-               nr_items = item->u.side_vla->len;
+               elem_type = side_ptr_get(enum_elem_type->u.side_vla.elem_type);
+               array_item = side_ptr_get(side_ptr_get(item->u.side_static.side_vla)->sav);
+               nr_items = side_ptr_get(item->u.side_static.side_vla)->len;
                break;
        default:
                fprintf(stderr, "ERROR: Unexpected enum element type\n");
                abort();
        }
+       stride_bit = elem_type_to_stride(elem_type);
 
-       print_attributes("attr", ":", side_enum_mappings->attr, side_enum_mappings->nr_attr);
+       print_attributes("attr", ":", side_ptr_get(side_enum_mappings->attr), side_enum_mappings->nr_attr);
        printf("%s", side_enum_mappings->nr_attr ? ", " : "");
        printf("labels: [ ");
        for (i = 0; i < side_enum_mappings->nr_mappings; i++) {
-               const struct side_enum_bitmap_mapping *mapping = &side_enum_mappings->mappings[i];
+               const struct side_enum_bitmap_mapping *mapping = &side_ptr_get(side_enum_mappings->mappings)[i];
                bool match = false;
                uint64_t bit;
 
@@ -482,57 +680,30 @@ void print_enum_bitmap(const struct side_type_description *type_desc,
                for (bit = mapping->range_begin; bit <= mapping->range_end; bit++) {
                        if (bit > (nr_items * stride_bit) - 1)
                                break;
-                       switch (stride_bit) {
-                       case 8:
-                       {
-                               uint8_t v = array_item[bit / 8].u.integer_value.side_u8;
+                       if (side_enum_get(elem_type->type) == SIDE_TYPE_BYTE) {
+                               uint8_t v = array_item[bit / 8].u.side_static.byte_value;
                                if (v & (1ULL << (bit % 8))) {
                                        match = true;
                                        goto match;
                                }
-                               break;
-                       }
-                       case 16:
-                       {
-                               uint16_t v = array_item[bit / 16].u.integer_value.side_u16;
-                               if (reverse_byte_order)
-                                       v = side_bswap_16(v);
-                               if (v & (1ULL << (bit % 16))) {
-                                       match = true;
-                                       goto match;
-                               }
-                               break;
-                       }
-                       case 32:
-                       {
-                               uint32_t v = array_item[bit / 32].u.integer_value.side_u32;
-                               if (reverse_byte_order)
-                                       v = side_bswap_32(v);
-                               if (v & (1ULL << (bit % 32))) {
-                                       match = true;
-                                       goto match;
-                               }
-                               break;
-                       }
-                       case 64:
-                       {
-                               uint64_t v = array_item[bit / 64].u.integer_value.side_u64;
-                               if (reverse_byte_order)
-                                       v = side_bswap_64(v);
-                               if (v & (1ULL << (bit % 64))) {
+                       } else {
+                               union int_value v = {};
+
+                               v = tracer_load_integer_value(&elem_type->u.side_integer,
+                                               &array_item[bit / stride_bit].u.side_static.integer_value,
+                                               0, NULL);
+                               side_check_value_u64(v);
+                               if (v.u[SIDE_INTEGER128_SPLIT_LOW] & (1ULL << (bit % stride_bit))) {
                                        match = true;
                                        goto match;
                                }
-                               break;
-                       }
-                       default:
-                               abort();
                        }
                }
 match:
                if (match) {
                        printf("%s", print_count++ ? ", " : "");
-                       printf("\"%s\"", mapping->label);
+                       tracer_print_string(side_ptr_get(mapping->label.p), mapping->label.unit_size,
+                               side_enum_get(mapping->label.byte_order), NULL);
                }
        }
        if (!print_count)
@@ -541,15 +712,24 @@ match:
 }
 
 static
-void print_integer_binary(uint64_t v, int bits)
+void print_integer_binary(uint64_t v[NR_SIDE_INTEGER128_SPLIT], int bits)
 {
-       int i;
+       int bit;
 
        printf("0b");
-       v <<= 64 - bits;
-       for (i = 0; i < bits; i++) {
-               printf("%c", v & (1ULL << 63) ? '1' : '0');
-               v <<= 1;
+       if (bits > 64) {
+               bits -= 64;
+               v[SIDE_INTEGER128_SPLIT_HIGH] <<= 64 - bits;
+               for (bit = 0; bit < bits; bit++) {
+                       printf("%c", v[SIDE_INTEGER128_SPLIT_HIGH] & (1ULL << 63) ? '1' : '0');
+                       v[SIDE_INTEGER128_SPLIT_HIGH] <<= 1;
+               }
+               bits = 64;
+       }
+       v[SIDE_INTEGER128_SPLIT_LOW] <<= 64 - bits;
+       for (bit = 0; bit < bits; bit++) {
+               printf("%c", v[SIDE_INTEGER128_SPLIT_LOW] & (1ULL << 63) ? '1' : '0');
+               v[SIDE_INTEGER128_SPLIT_LOW] <<= 1;
        }
 }
 
@@ -563,106 +743,252 @@ void tracer_print_type_header(const char *separator,
 }
 
 static
-void tracer_print_type_integer(const char *separator,
-               const struct side_type_integer *type_integer,
-               const union side_integer_value *value)
+void tracer_print_type_bool(const char *separator,
+               const struct side_type_bool *type_bool,
+               const union side_bool_value *value,
+               uint16_t offset_bits)
 {
-       enum tracer_display_base base;
-       union {
-               uint64_t v_unsigned;
-               int64_t v_signed;
-       } v;
+       uint32_t len_bits;
+       bool reverse_bo;
+       uint64_t v;
 
-       if (!type_integer->len_bits ||
-                       type_integer->len_bits > type_integer->integer_size_bits)
+       if (!type_bool->len_bits)
+               len_bits = type_bool->bool_size * CHAR_BIT;
+       else
+               len_bits = type_bool->len_bits;
+       if (len_bits + offset_bits > type_bool->bool_size * CHAR_BIT)
                abort();
-       base = get_attr_display_base(type_integer->attr,
-                       type_integer->nr_attr);
-       switch (type_integer->integer_size_bits) {
-       case 8:
-               if (type_integer->signedness)
-                       v.v_signed = value->side_s8;
-               else
-                       v.v_unsigned = value->side_u8;
+       reverse_bo = side_enum_get(type_bool->byte_order) != SIDE_TYPE_BYTE_ORDER_HOST;
+       switch (type_bool->bool_size) {
+       case 1:
+               v = value->side_bool8;
                break;
-       case 16:
-               if (type_integer->signedness) {
-                       int16_t side_s16;
+       case 2:
+       {
+               uint16_t side_u16;
 
-                       side_s16 = value->side_s16;
-                       if (type_integer->byte_order != SIDE_TYPE_BYTE_ORDER_HOST)
-                               side_s16 = side_bswap_16(side_s16);
-                       v.v_signed = side_s16;
-               } else {
-                       uint16_t side_u16;
+               side_u16 = value->side_bool16;
+               if (reverse_bo)
+                       side_u16 = side_bswap_16(side_u16);
+               v = side_u16;
+               break;
+       }
+       case 4:
+       {
+               uint32_t side_u32;
 
-                       side_u16 = value->side_u16;
-                       if (type_integer->byte_order != SIDE_TYPE_BYTE_ORDER_HOST)
-                               side_u16 = side_bswap_16(side_u16);
-                       v.v_unsigned = side_u16;
-               }
+               side_u32 = value->side_bool32;
+               if (reverse_bo)
+                       side_u32 = side_bswap_32(side_u32);
+               v = side_u32;
                break;
-       case 32:
-               if (type_integer->signedness) {
-                       int32_t side_s32;
+       }
+       case 8:
+       {
+               uint64_t side_u64;
 
-                       side_s32 = value->side_s32;
-                       if (type_integer->byte_order != SIDE_TYPE_BYTE_ORDER_HOST)
-                               side_s32 = side_bswap_32(side_s32);
-                       v.v_signed = side_s32;
-               } else {
-                       uint32_t side_u32;
+               side_u64 = value->side_bool64;
+               if (reverse_bo)
+                       side_u64 = side_bswap_64(side_u64);
+               v = side_u64;
+               break;
+       }
+       default:
+               abort();
+       }
+       v >>= offset_bits;
+       if (len_bits < 64)
+               v &= (1ULL << len_bits) - 1;
+       tracer_print_type_header(separator, side_ptr_get(type_bool->attr), type_bool->nr_attr);
+       printf("%s", v ? "true" : "false");
+}
 
-                       side_u32 = value->side_u32;
-                       if (type_integer->byte_order != SIDE_TYPE_BYTE_ORDER_HOST)
-                               side_u32 = side_bswap_32(side_u32);
-                       v.v_unsigned = side_u32;
+/* 2^128 - 1 */
+#define U128_BASE_10_ARRAY_LEN sizeof("340282366920938463463374607431768211455")
+/* -2^127 */
+#define S128_BASE_10_ARRAY_LEN sizeof("-170141183460469231731687303715884105728")
+
+/*
+ * u128_tostring_base_10 is inspired from https://stackoverflow.com/a/4364365
+ */
+static
+void u128_tostring_base_10(union int_value v, char str[U128_BASE_10_ARRAY_LEN])
+{
+       int d[39] = {}, i, j, str_i = 0;
+
+       for (i = 63; i > -1; i--) {
+               if ((v.u[SIDE_INTEGER128_SPLIT_HIGH] >> i) & 1)
+                       d[0]++;
+               for (j = 0; j < 39; j++)
+                       d[j] *= 2;
+               for (j = 0; j < 38; j++) {
+                       d[j + 1] += d[j] / 10;
+                       d[j] %= 10;
                }
-               break;
-       case 64:
-               if (type_integer->signedness) {
-                       int64_t side_s64;
+       }
+       for (i = 63; i > -1; i--) {
+               if ((v.u[SIDE_INTEGER128_SPLIT_LOW] >> i) & 1)
+                       d[0]++;
+               if (i > 0) {
+                       for (j = 0; j < 39; j++)
+                               d[j] *= 2;
+               }
+               for (j = 0; j < 38; j++) {
+                       d[j + 1] += d[j] / 10;
+                       d[j] %= 10;
+               }
+       }
+       for (i = 38; i > 0; i--)
+               if (d[i] > 0)
+                       break;
+       for (; i > -1; i--) {
+               str[str_i++] = '0' + d[i];
+       }
+       str[str_i] = '\0';
+}
 
-                       side_s64 = value->side_s64;
-                       if (type_integer->byte_order != SIDE_TYPE_BYTE_ORDER_HOST)
-                               side_s64 = side_bswap_64(side_s64);
-                       v.v_signed = side_s64;
-               } else {
-                       uint64_t side_u64;
+static
+void s128_tostring_base_10(union int_value v, char str[S128_BASE_10_ARRAY_LEN])
+{
+       uint64_t low, high, tmp;
 
-                       side_u64 = value->side_u64;
-                       if (type_integer->byte_order != SIDE_TYPE_BYTE_ORDER_HOST)
-                               side_u64 = side_bswap_64(side_u64);
-                       v.v_unsigned = side_u64;
+       if (v.s[SIDE_INTEGER128_SPLIT_HIGH] >= 0) {
+               /* Positive. */
+               v.u[SIDE_INTEGER128_SPLIT_LOW] = (uint64_t) v.s[SIDE_INTEGER128_SPLIT_LOW];
+               v.u[SIDE_INTEGER128_SPLIT_HIGH] = (uint64_t) v.s[SIDE_INTEGER128_SPLIT_HIGH];
+               u128_tostring_base_10(v, str);
+               return;
+       }
+
+       /* Negative. */
+
+       /* Special-case minimum value, which has no positive signed representation. */
+       if ((v.s[SIDE_INTEGER128_SPLIT_HIGH] == INT64_MIN) && (v.s[SIDE_INTEGER128_SPLIT_LOW] == 0)) {
+               memcpy(str, "-170141183460469231731687303715884105728", S128_BASE_10_ARRAY_LEN);
+               return;
+       }
+       /* Convert from two's complement. */
+       high = ~(uint64_t) v.s[SIDE_INTEGER128_SPLIT_HIGH];
+       low = ~(uint64_t) v.s[SIDE_INTEGER128_SPLIT_LOW];
+       tmp = low + 1;
+       if (tmp < low) {
+               high++;
+               /* Clear overflow to sign bit. */
+               high &= ~0x8000000000000000ULL;
+       }
+       v.u[SIDE_INTEGER128_SPLIT_LOW] = tmp;
+       v.u[SIDE_INTEGER128_SPLIT_HIGH] = high;
+       str[0] = '-';
+       u128_tostring_base_10(v, str + 1);
+}
+
+/* 2^128 - 1 */
+#define U128_BASE_8_ARRAY_LEN  sizeof("3777777777777777777777777777777777777777777")
+
+static
+void u128_tostring_base_8(union int_value v, char str[U128_BASE_8_ARRAY_LEN])
+{
+       int d[43] = {}, i, j, str_i = 0;
+
+       for (i = 63; i > -1; i--) {
+               if ((v.u[SIDE_INTEGER128_SPLIT_HIGH] >> i) & 1)
+                       d[0]++;
+               for (j = 0; j < 43; j++)
+                       d[j] *= 2;
+               for (j = 0; j < 42; j++) {
+                       d[j + 1] += d[j] / 8;
+                       d[j] %= 8;
                }
-               break;
-       default:
-               abort();
        }
-       if (type_integer->len_bits < 64)
-               v.v_unsigned &= (1ULL << type_integer->len_bits) - 1;
-       tracer_print_type_header(separator, type_integer->attr, type_integer->nr_attr);
+       for (i = 63; i > -1; i--) {
+               if ((v.u[SIDE_INTEGER128_SPLIT_LOW] >> i) & 1)
+                       d[0]++;
+               if (i > 0) {
+                       for (j = 0; j < 43; j++)
+                               d[j] *= 2;
+               }
+               for (j = 0; j < 42; j++) {
+                       d[j + 1] += d[j] / 8;
+                       d[j] %= 8;
+               }
+       }
+       for (i = 42; i > 0; i--)
+               if (d[i] > 0)
+                       break;
+       for (; i > -1; i--) {
+               str[str_i++] = '0' + d[i];
+       }
+       str[str_i] = '\0';
+}
+
+static
+void tracer_print_type_integer(const char *separator,
+               const struct side_type_integer *type_integer,
+               const union side_integer_value *value,
+               uint16_t offset_bits,
+               enum tracer_display_base default_base)
+{
+       enum tracer_display_base base;
+       union int_value v;
+       uint16_t len_bits;
+
+       v = tracer_load_integer_value(type_integer, value, offset_bits, &len_bits);
+       tracer_print_type_header(separator, side_ptr_get(type_integer->attr), type_integer->nr_attr);
+       base = get_attr_display_base(side_ptr_get(type_integer->attr), type_integer->nr_attr, default_base);
        switch (base) {
        case TRACER_DISPLAY_BASE_2:
-               print_integer_binary(v.v_unsigned, type_integer->len_bits);
+               print_integer_binary(v.u, len_bits);
                break;
        case TRACER_DISPLAY_BASE_8:
-               printf("0%" PRIo64, v.v_unsigned);
+               /* Clear sign bits beyond len_bits */
+               if (len_bits < 64) {
+                       v.u[SIDE_INTEGER128_SPLIT_LOW] &= (1ULL << len_bits) - 1;
+                       v.u[SIDE_INTEGER128_SPLIT_HIGH] = 0;
+               } else if (len_bits < 128) {
+                       v.u[SIDE_INTEGER128_SPLIT_HIGH] &= (1ULL << (len_bits - 64)) - 1;
+               }
+               if (len_bits <= 64) {
+                       printf("0o%" PRIo64, v.u[SIDE_INTEGER128_SPLIT_LOW]);
+               } else {
+                       char str[U128_BASE_8_ARRAY_LEN];
+
+                       u128_tostring_base_8(v, str);
+                       printf("0o%s", str);
+               }
                break;
        case TRACER_DISPLAY_BASE_10:
-               if (type_integer->signedness) {
-                       /* Sign-extend. */
-                       if (type_integer->len_bits < 64) {
-                               if (v.v_unsigned & (1ULL << (type_integer->len_bits - 1)))
-                                       v.v_unsigned |= ~((1ULL << type_integer->len_bits) - 1);
-                       }
-                       printf("%" PRId64, v.v_signed);
+               if (len_bits <= 64) {
+                       if (type_integer->signedness)
+                               printf("%" PRId64, v.s[SIDE_INTEGER128_SPLIT_LOW]);
+                       else
+                               printf("%" PRIu64, v.u[SIDE_INTEGER128_SPLIT_LOW]);
                } else {
-                       printf("%" PRIu64, v.v_unsigned);
+                       if (type_integer->signedness) {
+                               char str[S128_BASE_10_ARRAY_LEN];
+                               s128_tostring_base_10(v, str);
+                               printf("%s", str);
+                       } else {
+                               char str[U128_BASE_10_ARRAY_LEN];
+                               u128_tostring_base_10(v, str);
+                               printf("%s", str);
+                       }
                }
                break;
        case TRACER_DISPLAY_BASE_16:
-               printf("0x%" PRIx64, v.v_unsigned);
+               /* Clear sign bits beyond len_bits */
+               if (len_bits < 64) {
+                       v.u[SIDE_INTEGER128_SPLIT_LOW] &= (1ULL << len_bits) - 1;
+                       v.u[SIDE_INTEGER128_SPLIT_HIGH] = 0;
+               } else if (len_bits < 128) {
+                       v.u[SIDE_INTEGER128_SPLIT_HIGH] &= (1ULL << (len_bits - 64)) - 1;
+               }
+               if (len_bits <= 64 || v.u[SIDE_INTEGER128_SPLIT_HIGH] == 0) {
+                       printf("0x%" PRIx64, v.u[SIDE_INTEGER128_SPLIT_LOW]);
+               } else {
+                       printf("0x%" PRIx64 "%016" PRIx64,
+                               v.u[SIDE_INTEGER128_SPLIT_HIGH],
+                               v.u[SIDE_INTEGER128_SPLIT_LOW]);
+               }
                break;
        default:
                abort();
@@ -670,65 +996,115 @@ void tracer_print_type_integer(const char *separator,
 }
 
 static
-void tracer_print_type(const struct side_type_description *type_desc, const struct side_arg_vec *item)
+void tracer_print_type_float(const char *separator,
+               const struct side_type_float *type_float,
+               const union side_float_value *value)
 {
-       enum side_type type;
+       bool reverse_bo;
 
-       switch (type_desc->type) {
-       case SIDE_TYPE_ARRAY:
-               switch (item->type) {
-               case SIDE_TYPE_ARRAY_U8:
-               case SIDE_TYPE_ARRAY_U16:
-               case SIDE_TYPE_ARRAY_U32:
-               case SIDE_TYPE_ARRAY_U64:
-               case SIDE_TYPE_ARRAY_S8:
-               case SIDE_TYPE_ARRAY_S16:
-               case SIDE_TYPE_ARRAY_S32:
-               case SIDE_TYPE_ARRAY_S64:
-               case SIDE_TYPE_ARRAY_POINTER32:
-               case SIDE_TYPE_ARRAY_POINTER64:
-               case SIDE_TYPE_ARRAY_BYTE:
-               case SIDE_TYPE_ARRAY:
-                       break;
-               default:
-                       fprintf(stderr, "ERROR: type mismatch between description and arguments\n");
-                       abort();
-                       break;
-               }
+       tracer_print_type_header(separator, side_ptr_get(type_float->attr), type_float->nr_attr);
+       reverse_bo = side_enum_get(type_float->byte_order) != SIDE_TYPE_FLOAT_WORD_ORDER_HOST;
+       switch (type_float->float_size) {
+       case 2:
+       {
+#if __HAVE_FLOAT16
+               union {
+                       _Float16 f;
+                       uint16_t u;
+               } float16 = {
+                       .f = value->side_float_binary16,
+               };
+
+               if (reverse_bo)
+                       float16.u = side_bswap_16(float16.u);
+               printf("%g", (double) float16.f);
                break;
+#else
+               fprintf(stderr, "ERROR: Unsupported binary16 float type\n");
+               abort();
+#endif
+       }
+       case 4:
+       {
+#if __HAVE_FLOAT32
+               union {
+                       _Float32 f;
+                       uint32_t u;
+               } float32 = {
+                       .f = value->side_float_binary32,
+               };
 
-       case SIDE_TYPE_VLA:
-               switch (item->type) {
-               case SIDE_TYPE_VLA_U8:
-               case SIDE_TYPE_VLA_U16:
-               case SIDE_TYPE_VLA_U32:
-               case SIDE_TYPE_VLA_U64:
-               case SIDE_TYPE_VLA_S8:
-               case SIDE_TYPE_VLA_S16:
-               case SIDE_TYPE_VLA_S32:
-               case SIDE_TYPE_VLA_S64:
-               case SIDE_TYPE_VLA_BYTE:
-               case SIDE_TYPE_VLA_POINTER32:
-               case SIDE_TYPE_VLA_POINTER64:
-               case SIDE_TYPE_VLA:
-                       break;
-               default:
-                       fprintf(stderr, "ERROR: type mismatch between description and arguments\n");
-                       abort();
-                       break;
-               }
+               if (reverse_bo)
+                       float32.u = side_bswap_32(float32.u);
+               printf("%g", (double) float32.f);
+               break;
+#else
+               fprintf(stderr, "ERROR: Unsupported binary32 float type\n");
+               abort();
+#endif
+       }
+       case 8:
+       {
+#if __HAVE_FLOAT64
+               union {
+                       _Float64 f;
+                       uint64_t u;
+               } float64 = {
+                       .f = value->side_float_binary64,
+               };
+
+               if (reverse_bo)
+                       float64.u = side_bswap_64(float64.u);
+               printf("%g", (double) float64.f);
+               break;
+#else
+               fprintf(stderr, "ERROR: Unsupported binary64 float type\n");
+               abort();
+#endif
+       }
+       case 16:
+       {
+#if __HAVE_FLOAT128
+               union {
+                       _Float128 f;
+                       char arr[16];
+               } float128 = {
+                       .f = value->side_float_binary128,
+               };
+
+               if (reverse_bo)
+                       side_bswap_128p(float128.arr);
+               printf("%Lg", (long double) float128.f);
                break;
+#else
+               fprintf(stderr, "ERROR: Unsupported binary128 float type\n");
+               abort();
+#endif
+       }
+       default:
+               fprintf(stderr, "ERROR: Unknown float size\n");
+               abort();
+       }
+}
+
+static
+void tracer_print_type(const struct side_type *type_desc, const struct side_arg *item)
+{
+       enum side_type_label type;
 
+       switch (side_enum_get(type_desc->type)) {
        case SIDE_TYPE_ENUM:
-               switch (item->type) {
+               switch (side_enum_get(item->type)) {
                case SIDE_TYPE_U8:
                case SIDE_TYPE_U16:
                case SIDE_TYPE_U32:
                case SIDE_TYPE_U64:
+               case SIDE_TYPE_U128:
                case SIDE_TYPE_S8:
                case SIDE_TYPE_S16:
                case SIDE_TYPE_S32:
                case SIDE_TYPE_S64:
+               case SIDE_TYPE_S128:
                        break;
                default:
                        fprintf(stderr, "ERROR: type mismatch between description and arguments\n");
@@ -738,12 +1114,13 @@ void tracer_print_type(const struct side_type_description *type_desc, const stru
                break;
 
        case SIDE_TYPE_ENUM_BITMAP:
-               switch (item->type) {
+               switch (side_enum_get(item->type)) {
                case SIDE_TYPE_U8:
                case SIDE_TYPE_BYTE:
                case SIDE_TYPE_U16:
                case SIDE_TYPE_U32:
                case SIDE_TYPE_U64:
+               case SIDE_TYPE_U128:
                case SIDE_TYPE_ARRAY:
                case SIDE_TYPE_VLA:
                        break;
@@ -754,619 +1131,660 @@ void tracer_print_type(const struct side_type_description *type_desc, const stru
                }
                break;
 
+       case SIDE_TYPE_GATHER_ENUM:
+               switch (side_enum_get(item->type)) {
+               case SIDE_TYPE_GATHER_INTEGER:
+                       break;
+               default:
+                       fprintf(stderr, "ERROR: type mismatch between description and arguments\n");
+                       abort();
+                       break;
+               }
+               break;
+
+       case SIDE_TYPE_DYNAMIC:
+               switch (side_enum_get(item->type)) {
+               case SIDE_TYPE_DYNAMIC_NULL:
+               case SIDE_TYPE_DYNAMIC_BOOL:
+               case SIDE_TYPE_DYNAMIC_INTEGER:
+               case SIDE_TYPE_DYNAMIC_BYTE:
+               case SIDE_TYPE_DYNAMIC_POINTER:
+               case SIDE_TYPE_DYNAMIC_FLOAT:
+               case SIDE_TYPE_DYNAMIC_STRING:
+               case SIDE_TYPE_DYNAMIC_STRUCT:
+               case SIDE_TYPE_DYNAMIC_STRUCT_VISITOR:
+               case SIDE_TYPE_DYNAMIC_VLA:
+               case SIDE_TYPE_DYNAMIC_VLA_VISITOR:
+                       break;
+               default:
+                       fprintf(stderr, "ERROR: Unexpected dynamic type\n");
+                       abort();
+                       break;
+               }
+               break;
+
        default:
-               if (type_desc->type != item->type) {
+               if (side_enum_get(type_desc->type) != side_enum_get(item->type)) {
                        fprintf(stderr, "ERROR: type mismatch between description and arguments\n");
                        abort();
                }
                break;
        }
 
-       if (type_desc->type == SIDE_TYPE_ENUM || type_desc->type == SIDE_TYPE_ENUM_BITMAP)
-               type = type_desc->type;
+       if (side_enum_get(type_desc->type) == SIDE_TYPE_ENUM || side_enum_get(type_desc->type) == SIDE_TYPE_ENUM_BITMAP || side_enum_get(type_desc->type) == SIDE_TYPE_GATHER_ENUM)
+               type = side_enum_get(type_desc->type);
        else
-               type = item->type;
+               type = side_enum_get(item->type);
 
        printf("{ ");
        switch (type) {
+               /* Stack-copy basic types */
+       case SIDE_TYPE_NULL:
+               tracer_print_type_header(":", side_ptr_get(type_desc->u.side_null.attr),
+                       type_desc->u.side_null.nr_attr);
+               printf("<NULL TYPE>");
+               break;
+
        case SIDE_TYPE_BOOL:
-               tracer_print_type_header(":", type_desc->u.side_basic.attr, type_desc->u.side_basic.nr_attr);
-               printf("%s", item->u.side_bool ? "true" : "false");
+               tracer_print_type_bool(":", &type_desc->u.side_bool, &item->u.side_static.bool_value, 0);
                break;
 
        case SIDE_TYPE_U8:
        case SIDE_TYPE_U16:
        case SIDE_TYPE_U32:
        case SIDE_TYPE_U64:
+       case SIDE_TYPE_U128:
        case SIDE_TYPE_S8:
        case SIDE_TYPE_S16:
        case SIDE_TYPE_S32:
        case SIDE_TYPE_S64:
-               tracer_print_type_integer(":", &type_desc->u.side_integer,
-                                       &item->u.integer_value);
+       case SIDE_TYPE_S128:
+               tracer_print_type_integer(":", &type_desc->u.side_integer, &item->u.side_static.integer_value, 0,
+                               TRACER_DISPLAY_BASE_10);
                break;
 
-       case SIDE_TYPE_POINTER32:
-       {
-               uint32_t v;
+       case SIDE_TYPE_BYTE:
+               tracer_print_type_header(":", side_ptr_get(type_desc->u.side_byte.attr), type_desc->u.side_byte.nr_attr);
+               printf("0x%" PRIx8, item->u.side_static.byte_value);
+               break;
 
-               v = item->u.integer_value.side_u32;
-               if (type_to_host_reverse_bo(type_desc))
-                       v = side_bswap_32(v);
-               tracer_print_type_header(":", type_desc->u.side_integer.attr, type_desc->u.side_integer.nr_attr);
-               printf("0x%" PRIx32, v);
+       case SIDE_TYPE_POINTER:
+               tracer_print_type_integer(":", &type_desc->u.side_integer, &item->u.side_static.integer_value, 0,
+                               TRACER_DISPLAY_BASE_16);
                break;
-       }
-       case SIDE_TYPE_POINTER64:
-       {
-               uint64_t v;
 
-               v = item->u.integer_value.side_u64;
-               if (type_to_host_reverse_bo(type_desc))
-                       v = side_bswap_64(v);
-               tracer_print_type_header(":", type_desc->u.side_integer.attr, type_desc->u.side_integer.nr_attr);
-               printf("0x%" PRIx64, v);
+       case SIDE_TYPE_FLOAT_BINARY16:
+       case SIDE_TYPE_FLOAT_BINARY32:
+       case SIDE_TYPE_FLOAT_BINARY64:
+       case SIDE_TYPE_FLOAT_BINARY128:
+               tracer_print_type_float(":", &type_desc->u.side_float, &item->u.side_static.float_value);
                break;
-       }
-       case SIDE_TYPE_BYTE:
-               tracer_print_type_header(":", type_desc->u.side_basic.attr, type_desc->u.side_basic.nr_attr);
-               printf("0x%" PRIx8, item->u.side_byte);
+
+       case SIDE_TYPE_STRING_UTF8:
+       case SIDE_TYPE_STRING_UTF16:
+       case SIDE_TYPE_STRING_UTF32:
+               tracer_print_type_header(":", side_ptr_get(type_desc->u.side_string.attr), type_desc->u.side_string.nr_attr);
+               tracer_print_string(side_ptr_get(item->u.side_static.string_value),
+                               type_desc->u.side_string.unit_size, side_enum_get(type_desc->u.side_string.byte_order), NULL);
                break;
 
-       case SIDE_TYPE_ENUM:
-               print_enum(type_desc, item);
+               /* Stack-copy compound types */
+       case SIDE_TYPE_STRUCT:
+               tracer_print_struct(type_desc, side_ptr_get(item->u.side_static.side_struct));
+               break;
+       case SIDE_TYPE_VARIANT:
+               tracer_print_variant(type_desc, side_ptr_get(item->u.side_static.side_variant));
+               break;
+       case SIDE_TYPE_ARRAY:
+               tracer_print_array(type_desc, side_ptr_get(item->u.side_static.side_array));
+               break;
+       case SIDE_TYPE_VLA:
+               tracer_print_vla(type_desc, side_ptr_get(item->u.side_static.side_vla));
+               break;
+       case SIDE_TYPE_VLA_VISITOR:
+               tracer_print_vla_visitor(type_desc, side_ptr_get(item->u.side_static.side_vla_visitor));
                break;
 
+               /* Stack-copy enumeration types */
+       case SIDE_TYPE_ENUM:
+               tracer_print_enum(type_desc, item);
+               break;
        case SIDE_TYPE_ENUM_BITMAP:
-               print_enum_bitmap(type_desc, item);
+               tracer_print_enum_bitmap(type_desc, item);
                break;
 
-       case SIDE_TYPE_FLOAT_BINARY16:
-       {
-#if __HAVE_FLOAT16
-               union {
-                       _Float16 f;
-                       uint16_t u;
-               } float16 = {
-                       .f = item->u.float_value.side_float_binary16,
-               };
-
-               if (type_to_host_reverse_bo(type_desc))
-                       float16.u = side_bswap_16(float16.u);
-               tracer_print_type_header(":", type_desc->u.side_float.attr, type_desc->u.side_float.nr_attr);
-               printf("%g", (double) float16.f);
+               /* Gather basic types */
+       case SIDE_TYPE_GATHER_BOOL:
+               (void) tracer_print_gather_bool_type(&type_desc->u.side_gather, side_ptr_get(item->u.side_static.side_bool_gather_ptr));
                break;
-#else
-               fprintf(stderr, "ERROR: Unsupported binary16 float type\n");
-               abort();
-#endif
-       }
-       case SIDE_TYPE_FLOAT_BINARY32:
-       {
-#if __HAVE_FLOAT32
-               union {
-                       _Float32 f;
-                       uint32_t u;
-               } float32 = {
-                       .f = item->u.float_value.side_float_binary32,
-               };
-
-               if (type_to_host_reverse_bo(type_desc))
-                       float32.u = side_bswap_32(float32.u);
-               tracer_print_type_header(":", type_desc->u.side_float.attr, type_desc->u.side_float.nr_attr);
-               printf("%g", (double) float32.f);
+       case SIDE_TYPE_GATHER_INTEGER:
+               (void) tracer_print_gather_integer_type(&type_desc->u.side_gather, side_ptr_get(item->u.side_static.side_integer_gather_ptr),
+                                       TRACER_DISPLAY_BASE_10);
                break;
-#else
-               fprintf(stderr, "ERROR: Unsupported binary32 float type\n");
-               abort();
-#endif
-       }
-       case SIDE_TYPE_FLOAT_BINARY64:
-       {
-#if __HAVE_FLOAT64
-               union {
-                       _Float64 f;
-                       uint64_t u;
-               } float64 = {
-                       .f = item->u.float_value.side_float_binary64,
-               };
-
-               if (type_to_host_reverse_bo(type_desc))
-                       float64.u = side_bswap_64(float64.u);
-               tracer_print_type_header(":", type_desc->u.side_float.attr, type_desc->u.side_float.nr_attr);
-               printf("%g", (double) float64.f);
+       case SIDE_TYPE_GATHER_BYTE:
+               (void) tracer_print_gather_byte_type(&type_desc->u.side_gather, side_ptr_get(item->u.side_static.side_byte_gather_ptr));
                break;
-#else
-               fprintf(stderr, "ERROR: Unsupported binary64 float type\n");
-               abort();
-#endif
-       }
-       case SIDE_TYPE_FLOAT_BINARY128:
-       {
-#if __HAVE_FLOAT128
-               union {
-                       _Float128 f;
-                       char arr[16];
-               } float128 = {
-                       .f = item->u.float_value.side_float_binary128,
-               };
-
-               if (type_to_host_reverse_bo(type_desc))
-                       side_bswap_128p(float128.arr);
-               tracer_print_type_header(":", type_desc->u.side_float.attr, type_desc->u.side_float.nr_attr);
-               printf("%Lg", (long double) float128.f);
+       case SIDE_TYPE_GATHER_POINTER:
+               (void) tracer_print_gather_integer_type(&type_desc->u.side_gather, side_ptr_get(item->u.side_static.side_integer_gather_ptr),
+                                       TRACER_DISPLAY_BASE_16);
                break;
-#else
-               fprintf(stderr, "ERROR: Unsupported binary128 float type\n");
-               abort();
-#endif
-       }
-       case SIDE_TYPE_STRING:
-               tracer_print_type_header(":", type_desc->u.side_basic.attr, type_desc->u.side_basic.nr_attr);
-               printf("\"%s\"", (const char *)(uintptr_t) item->u.string);
+       case SIDE_TYPE_GATHER_FLOAT:
+               (void) tracer_print_gather_float_type(&type_desc->u.side_gather, side_ptr_get(item->u.side_static.side_float_gather_ptr));
                break;
-       case SIDE_TYPE_STRUCT:
-               tracer_print_struct(type_desc, item->u.side_struct);
+       case SIDE_TYPE_GATHER_STRING:
+               (void) tracer_print_gather_string_type(&type_desc->u.side_gather, side_ptr_get(item->u.side_static.side_string_gather_ptr));
                break;
-       case SIDE_TYPE_STRUCT_SG:
-               tracer_print_struct_sg(type_desc, item->u.side_struct_sg_ptr);
+
+               /* Gather compound type */
+       case SIDE_TYPE_GATHER_STRUCT:
+               (void) tracer_print_gather_struct(&type_desc->u.side_gather, side_ptr_get(item->u.side_static.side_struct_gather_ptr));
                break;
-       case SIDE_TYPE_ARRAY:
-               tracer_print_array(type_desc, item->u.side_array);
+       case SIDE_TYPE_GATHER_ARRAY:
+               (void) tracer_print_gather_array(&type_desc->u.side_gather, side_ptr_get(item->u.side_static.side_array_gather_ptr));
                break;
-       case SIDE_TYPE_VLA:
-               tracer_print_vla(type_desc, item->u.side_vla);
+       case SIDE_TYPE_GATHER_VLA:
+               (void) tracer_print_gather_vla(&type_desc->u.side_gather, side_ptr_get(item->u.side_static.side_vla_gather.ptr),
+                               side_ptr_get(item->u.side_static.side_vla_gather.length_ptr));
                break;
-       case SIDE_TYPE_VLA_VISITOR:
-               tracer_print_vla_visitor(type_desc, item->u.side_vla_app_visitor_ctx);
-               break;
-       case SIDE_TYPE_ARRAY_U8:
-       case SIDE_TYPE_ARRAY_U16:
-       case SIDE_TYPE_ARRAY_U32:
-       case SIDE_TYPE_ARRAY_U64:
-       case SIDE_TYPE_ARRAY_S8:
-       case SIDE_TYPE_ARRAY_S16:
-       case SIDE_TYPE_ARRAY_S32:
-       case SIDE_TYPE_ARRAY_S64:
-       case SIDE_TYPE_ARRAY_BYTE:
-       case SIDE_TYPE_ARRAY_POINTER32:
-       case SIDE_TYPE_ARRAY_POINTER64:
-               tracer_print_array_fixint(type_desc, item);
-               break;
-       case SIDE_TYPE_VLA_U8:
-       case SIDE_TYPE_VLA_U16:
-       case SIDE_TYPE_VLA_U32:
-       case SIDE_TYPE_VLA_U64:
-       case SIDE_TYPE_VLA_S8:
-       case SIDE_TYPE_VLA_S16:
-       case SIDE_TYPE_VLA_S32:
-       case SIDE_TYPE_VLA_S64:
-       case SIDE_TYPE_VLA_BYTE:
-       case SIDE_TYPE_VLA_POINTER32:
-       case SIDE_TYPE_VLA_POINTER64:
-               tracer_print_vla_fixint(type_desc, item);
+
+               /* Gather enumeration types */
+       case SIDE_TYPE_GATHER_ENUM:
+               (void) tracer_print_gather_enum_type(&type_desc->u.side_gather, side_ptr_get(item->u.side_static.side_integer_gather_ptr));
                break;
-       case SIDE_TYPE_DYNAMIC:
-               tracer_print_type_header(":", type_desc->u.side_basic.attr, type_desc->u.side_basic.nr_attr);
-               tracer_print_dynamic(&item->u.dynamic);
+
+       /* Dynamic basic types */
+       case SIDE_TYPE_DYNAMIC_NULL:
+       case SIDE_TYPE_DYNAMIC_BOOL:
+       case SIDE_TYPE_DYNAMIC_INTEGER:
+       case SIDE_TYPE_DYNAMIC_BYTE:
+       case SIDE_TYPE_DYNAMIC_POINTER:
+       case SIDE_TYPE_DYNAMIC_FLOAT:
+       case SIDE_TYPE_DYNAMIC_STRING:
+
+       /* Dynamic compound types */
+       case SIDE_TYPE_DYNAMIC_STRUCT:
+       case SIDE_TYPE_DYNAMIC_STRUCT_VISITOR:
+       case SIDE_TYPE_DYNAMIC_VLA:
+       case SIDE_TYPE_DYNAMIC_VLA_VISITOR:
+               tracer_print_dynamic(item);
                break;
        default:
-               fprintf(stderr, "<UNKNOWN TYPE>");
+               fprintf(stderr, "<UNKNOWN TYPE>\n");
                abort();
        }
        printf(" }");
 }
 
 static
-void tracer_print_field(const struct side_event_field *item_desc, const struct side_arg_vec *item)
+void tracer_print_field(const struct side_event_field *item_desc, const struct side_arg *item)
 {
-       printf("%s: ", item_desc->field_name);
+       printf("%s: ", side_ptr_get(item_desc->field_name));
        tracer_print_type(&item_desc->side_type, item);
 }
 
 static
-void tracer_print_struct(const struct side_type_description *type_desc, const struct side_arg_vec_description *sav_desc)
+void tracer_print_struct(const struct side_type *type_desc, const struct side_arg_vec *side_arg_vec)
 {
-       const struct side_arg_vec *sav = sav_desc->sav;
-       uint32_t side_sav_len = sav_desc->len;
-       int i;
+       const struct side_arg *sav = side_ptr_get(side_arg_vec->sav);
+       const struct side_type_struct *side_struct = side_ptr_get(type_desc->u.side_struct);
+       uint32_t i, side_sav_len = side_arg_vec->len;
 
-       if (type_desc->u.side_struct->nr_fields != side_sav_len) {
+       if (side_struct->nr_fields != side_sav_len) {
                fprintf(stderr, "ERROR: number of fields mismatch between description and arguments of structure\n");
                abort();
        }
-       print_attributes("attr", ":", type_desc->u.side_struct->attr, type_desc->u.side_struct->nr_attr);
-       printf("%s", type_desc->u.side_struct->nr_attr ? ", " : "");
+       print_attributes("attr", ":", side_ptr_get(side_struct->attr), side_struct->nr_attr);
+       printf("%s", side_struct->nr_attr ? ", " : "");
        printf("fields: { ");
        for (i = 0; i < side_sav_len; i++) {
                printf("%s", i ? ", " : "");
-               tracer_print_field(&type_desc->u.side_struct->fields[i], &sav[i]);
+               tracer_print_field(&side_ptr_get(side_struct->fields)[i], &sav[i]);
        }
        printf(" }");
 }
 
 static
-void tracer_print_sg_integer_type_header(const struct side_type_sg_description *sg_type)
+void tracer_print_variant(const struct side_type *type_desc, const struct side_arg_variant *side_arg_variant)
+{
+       const struct side_type_variant *side_type_variant = side_ptr_get(type_desc->u.side_variant);
+       const struct side_type *selector_type = &side_type_variant->selector;
+       union int_value v;
+       uint32_t i;
+
+       if (side_enum_get(selector_type->type) != side_enum_get(side_arg_variant->selector.type)) {
+               fprintf(stderr, "ERROR: Unexpected variant selector type\n");
+               abort();
+       }
+       switch (side_enum_get(selector_type->type)) {
+       case SIDE_TYPE_U8:
+       case SIDE_TYPE_U16:
+       case SIDE_TYPE_U32:
+       case SIDE_TYPE_U64:
+       case SIDE_TYPE_U128:
+       case SIDE_TYPE_S8:
+       case SIDE_TYPE_S16:
+       case SIDE_TYPE_S32:
+       case SIDE_TYPE_S64:
+       case SIDE_TYPE_S128:
+               break;
+       default:
+               fprintf(stderr, "ERROR: Expecting integer variant selector type\n");
+               abort();
+       }
+       v = tracer_load_integer_value(&selector_type->u.side_integer,
+                       &side_arg_variant->selector.u.side_static.integer_value, 0, NULL);
+       side_check_value_u64(v);
+       for (i = 0; i < side_type_variant->nr_options; i++) {
+               const struct side_variant_option *option = &side_ptr_get(side_type_variant->options)[i];
+
+               if (v.s[SIDE_INTEGER128_SPLIT_LOW] >= option->range_begin && v.s[SIDE_INTEGER128_SPLIT_LOW] <= option->range_end) {
+                       tracer_print_type(&option->side_type, &side_arg_variant->option);
+                       return;
+               }
+       }
+       fprintf(stderr, "ERROR: Variant selector value unknown %" PRId64 "\n", v.s[SIDE_INTEGER128_SPLIT_LOW]);
+       abort();
+}
+
+static
+void tracer_print_array(const struct side_type *type_desc, const struct side_arg_vec *side_arg_vec)
+{
+       const struct side_arg *sav = side_ptr_get(side_arg_vec->sav);
+       uint32_t i, side_sav_len = side_arg_vec->len;
+
+       if (type_desc->u.side_array.length != side_sav_len) {
+               fprintf(stderr, "ERROR: length mismatch between description and arguments of array\n");
+               abort();
+       }
+       print_attributes("attr", ":", side_ptr_get(type_desc->u.side_array.attr), type_desc->u.side_array.nr_attr);
+       printf("%s", type_desc->u.side_array.nr_attr ? ", " : "");
+       printf("elements: ");
+       printf("[ ");
+       for (i = 0; i < side_sav_len; i++) {
+               printf("%s", i ? ", " : "");
+               tracer_print_type(side_ptr_get(type_desc->u.side_array.elem_type), &sav[i]);
+       }
+       printf(" ]");
+}
+
+static
+void tracer_print_vla(const struct side_type *type_desc, const struct side_arg_vec *side_arg_vec)
+{
+       const struct side_arg *sav = side_ptr_get(side_arg_vec->sav);
+       uint32_t i, side_sav_len = side_arg_vec->len;
+
+       print_attributes("attr", ":", side_ptr_get(type_desc->u.side_vla.attr), type_desc->u.side_vla.nr_attr);
+       printf("%s", type_desc->u.side_vla.nr_attr ? ", " : "");
+       printf("elements: ");
+       printf("[ ");
+       for (i = 0; i < side_sav_len; i++) {
+               printf("%s", i ? ", " : "");
+               tracer_print_type(side_ptr_get(type_desc->u.side_vla.elem_type), &sav[i]);
+       }
+       printf(" ]");
+}
+
+static
+const char *tracer_gather_access(enum side_type_gather_access_mode access_mode, const char *ptr)
+{
+       switch (access_mode) {
+       case SIDE_TYPE_GATHER_ACCESS_DIRECT:
+               return ptr;
+       case SIDE_TYPE_GATHER_ACCESS_POINTER:
+               /* Dereference pointer */
+               memcpy(&ptr, ptr, sizeof(const char *));
+               return ptr;
+       default:
+               abort();
+       }
+}
+
+static
+uint32_t tracer_gather_size(enum side_type_gather_access_mode access_mode, uint32_t len)
+{
+       switch (access_mode) {
+       case SIDE_TYPE_GATHER_ACCESS_DIRECT:
+               return len;
+       case SIDE_TYPE_GATHER_ACCESS_POINTER:
+               return sizeof(void *);
+       default:
+               abort();
+       }
+}
+
+static
+union int_value tracer_load_gather_integer_value(const struct side_type_gather_integer *side_integer,
+               const void *_ptr)
 {
-       print_attributes("attr", ":", sg_type->u.side_basic.attr, sg_type->u.side_basic.nr_attr);
-       printf("%s", sg_type->u.side_basic.nr_attr ? ", " : "");
-       printf("value: ");
+       enum side_type_gather_access_mode access_mode =
+               (enum side_type_gather_access_mode) side_integer->access_mode;
+       uint32_t integer_size_bytes = side_integer->type.integer_size;
+       const char *ptr = (const char *) _ptr;
+       union side_integer_value value;
+
+       ptr = tracer_gather_access(access_mode, ptr + side_integer->offset);
+       memcpy(&value, ptr, integer_size_bytes);
+       return tracer_load_integer_value(&side_integer->type, &value,
+                       side_integer->offset_bits, NULL);
 }
 
 static
-void tracer_print_sg_type(const struct side_type_sg_description *sg_type, void *_ptr)
+uint32_t tracer_print_gather_bool_type(const struct side_type_gather *type_gather, const void *_ptr)
 {
-       enum tracer_display_base base = TRACER_DISPLAY_BASE_10;
+       enum side_type_gather_access_mode access_mode =
+               (enum side_type_gather_access_mode) type_gather->u.side_bool.access_mode;
+       uint32_t bool_size_bytes = type_gather->u.side_bool.type.bool_size;
        const char *ptr = (const char *) _ptr;
+       union side_bool_value value;
 
-       switch (sg_type->type) {
-       case SIDE_TYPE_SG_UNSIGNED_INT:
-       case SIDE_TYPE_SG_SIGNED_INT:
-               base = get_attr_display_base(sg_type->u.side_basic.attr,
-                               sg_type->u.side_basic.nr_attr);
+       switch (bool_size_bytes) {
+       case 1:
+       case 2:
+       case 4:
+       case 8:
                break;
        default:
-               break;
+               abort();
        }
+       ptr = tracer_gather_access(access_mode, ptr + type_gather->u.side_bool.offset);
+       memcpy(&value, ptr, bool_size_bytes);
+       tracer_print_type_bool(":", &type_gather->u.side_bool.type, &value,
+                       type_gather->u.side_bool.offset_bits);
+       return tracer_gather_size(access_mode, bool_size_bytes);
+}
 
-       printf("{ ");
-       switch (sg_type->type) {
-       case SIDE_TYPE_SG_UNSIGNED_INT:
-       {
-               tracer_print_sg_integer_type_header(sg_type);
-               switch (sg_type->u.side_basic.integer_size_bits) {
-               case 8:
-               {
-                       uint8_t v;
+static
+uint32_t tracer_print_gather_byte_type(const struct side_type_gather *type_gather, const void *_ptr)
+{
+       enum side_type_gather_access_mode access_mode =
+               (enum side_type_gather_access_mode) type_gather->u.side_byte.access_mode;
+       const char *ptr = (const char *) _ptr;
+       uint8_t value;
+
+       ptr = tracer_gather_access(access_mode, ptr + type_gather->u.side_byte.offset);
+       memcpy(&value, ptr, 1);
+       tracer_print_type_header(":", side_ptr_get(type_gather->u.side_byte.type.attr),
+                       type_gather->u.side_byte.type.nr_attr);
+       printf("0x%" PRIx8, value);
+       return tracer_gather_size(access_mode, 1);
+}
 
-                       if (!sg_type->u.side_basic.len_bits || sg_type->u.side_basic.len_bits + sg_type->u.side_basic.offset_bits > 8)
-                               abort();
-                       memcpy(&v, ptr + sg_type->u.side_basic.integer_offset, sizeof(v));
-                       v >>= sg_type->u.side_basic.offset_bits;
-                       if (sg_type->u.side_basic.len_bits < 8)
-                               v &= (1U << sg_type->u.side_basic.len_bits) - 1;
-                       switch (base) {
-                       case TRACER_DISPLAY_BASE_2:
-                               print_integer_binary(v, sg_type->u.side_basic.len_bits);
-                               break;
-                       case TRACER_DISPLAY_BASE_8:
-                               printf("0%" PRIo8, v);
-                               break;
-                       case TRACER_DISPLAY_BASE_10:
-                               printf("%" PRIu8, v);
-                               break;
-                       case TRACER_DISPLAY_BASE_16:
-                               printf("0x%" PRIx8, v);
-                               break;
-                       default:
-                               abort();
-                       }
-                       break;
-               }
-               case 16:
-               {
-                       uint16_t v;
+static
+uint32_t tracer_print_gather_integer_type(const struct side_type_gather *type_gather, const void *_ptr,
+               enum tracer_display_base default_base)
+{
+       enum side_type_gather_access_mode access_mode =
+               (enum side_type_gather_access_mode) type_gather->u.side_integer.access_mode;
+       uint32_t integer_size_bytes = type_gather->u.side_integer.type.integer_size;
+       const char *ptr = (const char *) _ptr;
+       union side_integer_value value;
 
-                       if (!sg_type->u.side_basic.len_bits || sg_type->u.side_basic.len_bits + sg_type->u.side_basic.offset_bits > 16)
-                               abort();
-                       memcpy(&v, ptr + sg_type->u.side_basic.integer_offset, sizeof(v));
-                       if (sg_type_to_host_reverse_bo(sg_type))
-                               v = side_bswap_16(v);
-                       v >>= sg_type->u.side_basic.offset_bits;
-                       if (sg_type->u.side_basic.len_bits < 16)
-                               v &= (1U << sg_type->u.side_basic.len_bits) - 1;
-                       switch (base) {
-                       case TRACER_DISPLAY_BASE_2:
-                               print_integer_binary(v, sg_type->u.side_basic.len_bits);
-                               break;
-                       case TRACER_DISPLAY_BASE_8:
-                               printf("0%" PRIo16, v);
-                               break;
-                       case TRACER_DISPLAY_BASE_10:
-                               printf("%" PRIu16, v);
-                               break;
-                       case TRACER_DISPLAY_BASE_16:
-                               printf("0x%" PRIx16, v);
-                               break;
-                       default:
-                               abort();
-                       }
-                       break;
-               }
-               case 32:
-               {
-                       uint32_t v;
+       switch (integer_size_bytes) {
+       case 1:
+       case 2:
+       case 4:
+       case 8:
+       case 16:
+               break;
+       default:
+               abort();
+       }
+       ptr = tracer_gather_access(access_mode, ptr + type_gather->u.side_integer.offset);
+       memcpy(&value, ptr, integer_size_bytes);
+       tracer_print_type_integer(":", &type_gather->u.side_integer.type, &value,
+                       type_gather->u.side_integer.offset_bits, default_base);
+       return tracer_gather_size(access_mode, integer_size_bytes);
+}
 
-                       if (!sg_type->u.side_basic.len_bits || sg_type->u.side_basic.len_bits + sg_type->u.side_basic.offset_bits > 32)
-                               abort();
-                       memcpy(&v, ptr + sg_type->u.side_basic.integer_offset, sizeof(v));
-                       if (sg_type_to_host_reverse_bo(sg_type))
-                               v = side_bswap_32(v);
-                       v >>= sg_type->u.side_basic.offset_bits;
-                       if (sg_type->u.side_basic.len_bits < 32)
-                               v &= (1U << sg_type->u.side_basic.len_bits) - 1;
-                       switch (base) {
-                       case TRACER_DISPLAY_BASE_2:
-                               print_integer_binary(v, sg_type->u.side_basic.len_bits);
-                               break;
-                       case TRACER_DISPLAY_BASE_8:
-                               printf("0%" PRIo32, v);
-                               break;
-                       case TRACER_DISPLAY_BASE_10:
-                               printf("%" PRIu32, v);
-                               break;
-                       case TRACER_DISPLAY_BASE_16:
-                               printf("0x%" PRIx32, v);
-                               break;
-                       default:
-                               abort();
-                       }
-                       break;
-               }
-               case 64:
-               {
-                       uint64_t v;
+static
+uint32_t tracer_print_gather_float_type(const struct side_type_gather *type_gather, const void *_ptr)
+{
+       enum side_type_gather_access_mode access_mode =
+               (enum side_type_gather_access_mode) type_gather->u.side_float.access_mode;
+       uint32_t float_size_bytes = type_gather->u.side_float.type.float_size;
+       const char *ptr = (const char *) _ptr;
+       union side_float_value value;
 
-                       if (!sg_type->u.side_basic.len_bits || sg_type->u.side_basic.len_bits + sg_type->u.side_basic.offset_bits > 64)
-                               abort();
-                       memcpy(&v, ptr + sg_type->u.side_basic.integer_offset, sizeof(v));
-                       if (sg_type_to_host_reverse_bo(sg_type))
-                               v = side_bswap_64(v);
-                       v >>= sg_type->u.side_basic.offset_bits;
-                       if (sg_type->u.side_basic.len_bits < 64)
-                               v &= (1ULL << sg_type->u.side_basic.len_bits) - 1;
-                       switch (base) {
-                       case TRACER_DISPLAY_BASE_2:
-                               print_integer_binary(v, sg_type->u.side_basic.len_bits);
-                               break;
-                       case TRACER_DISPLAY_BASE_8:
-                               printf("0%" PRIo64, v);
-                               break;
-                       case TRACER_DISPLAY_BASE_10:
-                               printf("%" PRIu64, v);
-                               break;
-                       case TRACER_DISPLAY_BASE_16:
-                               printf("0x%" PRIx64, v);
-                               break;
-                       default:
-                               abort();
-                       }
-                       break;
-               }
-               default:
-                       fprintf(stderr, "<UNKNOWN SCATTER-GATHER INTEGER SIZE>");
-                       abort();
-               }
+       switch (float_size_bytes) {
+       case 2:
+       case 4:
+       case 8:
+       case 16:
                break;
+       default:
+               abort();
        }
-       case SIDE_TYPE_SG_SIGNED_INT:
-       {
-               tracer_print_sg_integer_type_header(sg_type);
-               switch (sg_type->u.side_basic.integer_size_bits) {
-               case 8:
-               {
-                       int8_t v;
+       ptr = tracer_gather_access(access_mode, ptr + type_gather->u.side_float.offset);
+       memcpy(&value, ptr, float_size_bytes);
+       tracer_print_type_float(":", &type_gather->u.side_float.type, &value);
+       return tracer_gather_size(access_mode, float_size_bytes);
+}
 
-                       if (!sg_type->u.side_basic.len_bits || sg_type->u.side_basic.len_bits + sg_type->u.side_basic.offset_bits > 8)
-                               abort();
-                       memcpy(&v, ptr + sg_type->u.side_basic.integer_offset, sizeof(v));
-                       v >>= sg_type->u.side_basic.offset_bits;
-                       if (sg_type->u.side_basic.len_bits < 8)
-                               v &= (1U << sg_type->u.side_basic.len_bits) - 1;
-                       switch (base) {
-                       case TRACER_DISPLAY_BASE_2:
-                               print_integer_binary(v, sg_type->u.side_basic.len_bits);
-                               break;
-                       case TRACER_DISPLAY_BASE_8:
-                               printf("0%" PRIo8, v);
-                               break;
-                       case TRACER_DISPLAY_BASE_10:
-                               /* Sign-extend. */
-                               if (sg_type->u.side_basic.len_bits < 8) {
-                                       if (v & (1U << (sg_type->u.side_basic.len_bits - 1)))
-                                               v |= ~((1U << sg_type->u.side_basic.len_bits) - 1);
-                               }
-                               printf("%" PRId8, v);
-                               break;
-                       case TRACER_DISPLAY_BASE_16:
-                               printf("0x%" PRIx8, v);
-                               break;
-                       default:
-                               abort();
-                       }
-                       break;
-               }
-               case 16:
-               {
-                       int16_t v;
+static
+uint32_t tracer_print_gather_string_type(const struct side_type_gather *type_gather, const void *_ptr)
+{
+       enum side_type_gather_access_mode access_mode =
+               (enum side_type_gather_access_mode) type_gather->u.side_string.access_mode;
+       const char *ptr = (const char *) _ptr;
+       size_t string_len;
+
+       ptr = tracer_gather_access(access_mode, ptr + type_gather->u.side_string.offset);
+       tracer_print_type_header(":", side_ptr_get(type_gather->u.side_string.type.attr),
+                       type_gather->u.side_string.type.nr_attr);
+       if (ptr) {
+               tracer_print_string(ptr, type_gather->u.side_string.type.unit_size,
+                               side_enum_get(type_gather->u.side_string.type.byte_order), &string_len);
+       } else {
+               printf("<NULL>");
+               string_len = type_gather->u.side_string.type.unit_size;
+       }
+       return tracer_gather_size(access_mode, string_len);
+}
 
-                       if (!sg_type->u.side_basic.len_bits || sg_type->u.side_basic.len_bits + sg_type->u.side_basic.offset_bits > 16)
-                               abort();
-                       memcpy(&v, ptr + sg_type->u.side_basic.integer_offset, sizeof(v));
-                       if (sg_type_to_host_reverse_bo(sg_type))
-                               v = side_bswap_16(v);
-                       v >>= sg_type->u.side_basic.offset_bits;
-                       if (sg_type->u.side_basic.len_bits < 16)
-                               v &= (1U << sg_type->u.side_basic.len_bits) - 1;
-                       switch (base) {
-                       case TRACER_DISPLAY_BASE_2:
-                               print_integer_binary(v, sg_type->u.side_basic.len_bits);
-                               break;
-                       case TRACER_DISPLAY_BASE_8:
-                               printf("0%" PRIo16, v);
-                               break;
-                       case TRACER_DISPLAY_BASE_10:
-                               /* Sign-extend. */
-                               if (sg_type->u.side_basic.len_bits < 16) {
-                                       if (v & (1U << (sg_type->u.side_basic.len_bits - 1)))
-                                               v |= ~((1U << sg_type->u.side_basic.len_bits) - 1);
-                               }
-                               printf("%" PRId16, v);
-                               break;
-                       case TRACER_DISPLAY_BASE_16:
-                               printf("0x%" PRIx16, v);
-                               break;
-                       default:
-                               abort();
-                       }
-                       break;
-               }
-               case 32:
-               {
-                       uint32_t v;
+static
+uint32_t tracer_print_gather_type(const struct side_type *type_desc, const void *ptr)
+{
+       uint32_t len;
+
+       printf("{ ");
+       switch (side_enum_get(type_desc->type)) {
+               /* Gather basic types */
+       case SIDE_TYPE_GATHER_BOOL:
+               len = tracer_print_gather_bool_type(&type_desc->u.side_gather, ptr);
+               break;
+       case SIDE_TYPE_GATHER_INTEGER:
+               len = tracer_print_gather_integer_type(&type_desc->u.side_gather, ptr,
+                               TRACER_DISPLAY_BASE_10);
+               break;
+       case SIDE_TYPE_GATHER_BYTE:
+               len = tracer_print_gather_byte_type(&type_desc->u.side_gather, ptr);
+               break;
+       case SIDE_TYPE_GATHER_POINTER:
+               len = tracer_print_gather_integer_type(&type_desc->u.side_gather, ptr,
+                               TRACER_DISPLAY_BASE_16);
+               break;
+       case SIDE_TYPE_GATHER_FLOAT:
+               len = tracer_print_gather_float_type(&type_desc->u.side_gather, ptr);
+               break;
+       case SIDE_TYPE_GATHER_STRING:
+               len = tracer_print_gather_string_type(&type_desc->u.side_gather, ptr);
+               break;
 
-                       if (!sg_type->u.side_basic.len_bits || sg_type->u.side_basic.len_bits + sg_type->u.side_basic.offset_bits > 32)
-                               abort();
-                       memcpy(&v, ptr + sg_type->u.side_basic.integer_offset, sizeof(v));
-                       if (sg_type_to_host_reverse_bo(sg_type))
-                               v = side_bswap_32(v);
-                       v >>= sg_type->u.side_basic.offset_bits;
-                       if (sg_type->u.side_basic.len_bits < 32)
-                               v &= (1U << sg_type->u.side_basic.len_bits) - 1;
-                       switch (base) {
-                       case TRACER_DISPLAY_BASE_2:
-                               print_integer_binary(v, sg_type->u.side_basic.len_bits);
-                               break;
-                       case TRACER_DISPLAY_BASE_8:
-                               printf("0%" PRIo32, v);
-                               break;
-                       case TRACER_DISPLAY_BASE_10:
-                               /* Sign-extend. */
-                               if (sg_type->u.side_basic.len_bits < 32) {
-                                       if (v & (1U << (sg_type->u.side_basic.len_bits - 1)))
-                                               v |= ~((1U << sg_type->u.side_basic.len_bits) - 1);
-                               }
-                               printf("%" PRId32, v);
-                               break;
-                       case TRACER_DISPLAY_BASE_16:
-                               printf("0x%" PRIx32, v);
-                               break;
-                       default:
-                               abort();
-                       }
-                       break;
-               }
-               case 64:
-               {
-                       uint64_t v;
+               /* Gather enum types */
+       case SIDE_TYPE_GATHER_ENUM:
+               len = tracer_print_gather_enum_type(&type_desc->u.side_gather, ptr);
+               break;
 
-                       if (!sg_type->u.side_basic.len_bits || sg_type->u.side_basic.len_bits + sg_type->u.side_basic.offset_bits > 64)
-                               abort();
-                       memcpy(&v, ptr + sg_type->u.side_basic.integer_offset, sizeof(v));
-                       if (sg_type_to_host_reverse_bo(sg_type))
-                               v = side_bswap_64(v);
-                       v >>= sg_type->u.side_basic.offset_bits;
-                       if (sg_type->u.side_basic.len_bits < 64)
-                               v &= (1ULL << sg_type->u.side_basic.len_bits) - 1;
-                       switch (base) {
-                       case TRACER_DISPLAY_BASE_2:
-                               print_integer_binary(v, sg_type->u.side_basic.len_bits);
-                               break;
-                       case TRACER_DISPLAY_BASE_8:
-                               printf("0%" PRIo64, v);
-                               break;
-                       case TRACER_DISPLAY_BASE_10:
-                               /* Sign-extend. */
-                               if (sg_type->u.side_basic.len_bits < 64) {
-                                       if (v & (1ULL << (sg_type->u.side_basic.len_bits - 1)))
-                                               v |= ~((1ULL << sg_type->u.side_basic.len_bits) - 1);
-                               }
-                               printf("%" PRId64, v);
-                               break;
-                       case TRACER_DISPLAY_BASE_16:
-                               printf("0x%" PRIx64, v);
-                               break;
-                       default:
-                               abort();
-                       }
-                       break;
-               }
-               default:
-                       fprintf(stderr, "<UNKNOWN SCATTER-GATHER INTEGER SIZE>");
-                       abort();
-               }
+               /* Gather compound types */
+       case SIDE_TYPE_GATHER_STRUCT:
+               len = tracer_print_gather_struct(&type_desc->u.side_gather, ptr);
+               break;
+       case SIDE_TYPE_GATHER_ARRAY:
+               len = tracer_print_gather_array(&type_desc->u.side_gather, ptr);
+               break;
+       case SIDE_TYPE_GATHER_VLA:
+               len = tracer_print_gather_vla(&type_desc->u.side_gather, ptr, ptr);
                break;
-       }
        default:
-               fprintf(stderr, "<UNKNOWN SCATTER-GATHER TYPE>");
+               fprintf(stderr, "<UNKNOWN GATHER TYPE>");
                abort();
        }
        printf(" }");
+       return len;
+}
+
+static
+uint32_t tracer_print_gather_enum_type(const struct side_type_gather *type_gather, const void *_ptr)
+{
+       const struct side_enum_mappings *mappings = side_ptr_get(type_gather->u.side_enum.mappings);
+       const struct side_type *enum_elem_type = side_ptr_get(type_gather->u.side_enum.elem_type);
+       const struct side_type_gather_integer *side_integer = &enum_elem_type->u.side_gather.u.side_integer;
+       enum side_type_gather_access_mode access_mode =
+               (enum side_type_gather_access_mode) side_integer->access_mode;
+       uint32_t integer_size_bytes = side_integer->type.integer_size;
+       const char *ptr = (const char *) _ptr;
+       union side_integer_value value;
+       union int_value v;
+
+       switch (integer_size_bytes) {
+       case 1:
+       case 2:
+       case 4:
+       case 8:
+       case 16:
+               break;
+       default:
+               abort();
+       }
+       ptr = tracer_gather_access(access_mode, ptr + side_integer->offset);
+       memcpy(&value, ptr, integer_size_bytes);
+       v = tracer_load_gather_integer_value(side_integer, &value);
+       print_attributes("attr", ":", side_ptr_get(mappings->attr), mappings->nr_attr);
+       printf("%s", mappings->nr_attr ? ", " : "");
+       tracer_print_gather_type(enum_elem_type, ptr);
+       print_enum_labels(mappings, v);
+       return tracer_gather_size(access_mode, integer_size_bytes);
 }
 
 static
-void tracer_print_sg_field(const struct side_struct_field_sg *field_sg, void *ptr)
+void tracer_print_gather_field(const struct side_event_field *field, const void *ptr)
 {
-       printf("%s: ", field_sg->field_name);
-       tracer_print_sg_type(&field_sg->side_type, ptr);
+       printf("%s: ", side_ptr_get(field->field_name));
+       (void) tracer_print_gather_type(&field->side_type, ptr);
 }
 
 static
-void tracer_print_struct_sg(const struct side_type_description *type_desc, void *ptr)
+uint32_t tracer_print_gather_struct(const struct side_type_gather *type_gather, const void *_ptr)
 {
-       const struct side_type_struct_sg *struct_sg = type_desc->u.side_struct_sg;
-       int i;
+       enum side_type_gather_access_mode access_mode =
+               (enum side_type_gather_access_mode) type_gather->u.side_struct.access_mode;
+       const struct side_type_struct *side_struct = side_ptr_get(type_gather->u.side_struct.type);
+       const char *ptr = (const char *) _ptr;
+       uint32_t i;
 
-       print_attributes("attr", ":", struct_sg->attr, struct_sg->nr_attr);
-       printf("%s", struct_sg->nr_attr ? ", " : "");
+       ptr = tracer_gather_access(access_mode, ptr + type_gather->u.side_struct.offset);
+       print_attributes("attr", ":", side_ptr_get(side_struct->attr), side_struct->nr_attr);
+       printf("%s", side_struct->nr_attr ? ", " : "");
        printf("fields: { ");
-       for (i = 0; i < struct_sg->nr_fields; i++) {
+       for (i = 0; i < side_struct->nr_fields; i++) {
                printf("%s", i ? ", " : "");
-               tracer_print_sg_field(&struct_sg->fields_sg[i], ptr);
+               tracer_print_gather_field(&side_ptr_get(side_struct->fields)[i], ptr);
        }
        printf(" }");
+       return tracer_gather_size(access_mode, type_gather->u.side_struct.size);
 }
 
 static
-void tracer_print_array(const struct side_type_description *type_desc, const struct side_arg_vec_description *sav_desc)
+uint32_t tracer_print_gather_array(const struct side_type_gather *type_gather, const void *_ptr)
 {
-       const struct side_arg_vec *sav = sav_desc->sav;
-       uint32_t side_sav_len = sav_desc->len;
-       int i;
+       enum side_type_gather_access_mode access_mode =
+               (enum side_type_gather_access_mode) type_gather->u.side_array.access_mode;
+       const char *ptr = (const char *) _ptr, *orig_ptr;
+       uint32_t i;
 
-       if (type_desc->u.side_array.length != side_sav_len) {
-               fprintf(stderr, "ERROR: length mismatch between description and arguments of array\n");
-               abort();
-       }
-       print_attributes("attr", ":", type_desc->u.side_array.attr, type_desc->u.side_array.nr_attr);
-       printf("%s", type_desc->u.side_array.nr_attr ? ", " : "");
+       ptr = tracer_gather_access(access_mode, ptr + type_gather->u.side_array.offset);
+       orig_ptr = ptr;
+       print_attributes("attr", ":", side_ptr_get(type_gather->u.side_array.type.attr), type_gather->u.side_array.type.nr_attr);
+       printf("%s", type_gather->u.side_array.type.nr_attr ? ", " : "");
        printf("elements: ");
        printf("[ ");
-       for (i = 0; i < side_sav_len; i++) {
+       for (i = 0; i < type_gather->u.side_array.type.length; i++) {
+               const struct side_type *elem_type = side_ptr_get(type_gather->u.side_array.type.elem_type);
+
+               switch (side_enum_get(elem_type->type)) {
+               case SIDE_TYPE_GATHER_VLA:
+                       fprintf(stderr, "<gather VLA only supported within gather structures>\n");
+                       abort();
+               default:
+                       break;
+               }
                printf("%s", i ? ", " : "");
-               tracer_print_type(type_desc->u.side_array.elem_type, &sav[i]);
+               ptr += tracer_print_gather_type(elem_type, ptr);
        }
        printf(" ]");
+       return tracer_gather_size(access_mode, ptr - orig_ptr);
 }
 
 static
-void tracer_print_vla(const struct side_type_description *type_desc, const struct side_arg_vec_description *sav_desc)
+uint32_t tracer_print_gather_vla(const struct side_type_gather *type_gather, const void *_ptr,
+               const void *_length_ptr)
 {
-       const struct side_arg_vec *sav = sav_desc->sav;
-       uint32_t side_sav_len = sav_desc->len;
-       int i;
-
-       print_attributes("attr", ":", type_desc->u.side_vla.attr, type_desc->u.side_vla.nr_attr);
-       printf("%s", type_desc->u.side_vla.nr_attr ? ", " : "");
+       enum side_type_gather_access_mode access_mode =
+               (enum side_type_gather_access_mode) type_gather->u.side_vla.access_mode;
+       const struct side_type *length_type = side_ptr_get(type_gather->u.side_vla.length_type);
+       const char *ptr = (const char *) _ptr, *orig_ptr;
+       const char *length_ptr = (const char *) _length_ptr;
+       union int_value v = {};
+       uint32_t i, length;
+
+       /* Access length */
+       switch (side_enum_get(length_type->type)) {
+       case SIDE_TYPE_GATHER_INTEGER:
+               break;
+       default:
+               fprintf(stderr, "<gather VLA expects integer gather length type>\n");
+               abort();
+       }
+       v = tracer_load_gather_integer_value(&length_type->u.side_gather.u.side_integer,
+                                       length_ptr);
+       if (v.u[SIDE_INTEGER128_SPLIT_HIGH] || v.u[SIDE_INTEGER128_SPLIT_LOW] > UINT32_MAX) {
+               fprintf(stderr, "Unexpected vla length value\n");
+               abort();
+       }
+       length = (uint32_t) v.u[SIDE_INTEGER128_SPLIT_LOW];
+       ptr = tracer_gather_access(access_mode, ptr + type_gather->u.side_vla.offset);
+       orig_ptr = ptr;
+       print_attributes("attr", ":", side_ptr_get(type_gather->u.side_vla.type.attr), type_gather->u.side_vla.type.nr_attr);
+       printf("%s", type_gather->u.side_vla.type.nr_attr ? ", " : "");
        printf("elements: ");
        printf("[ ");
-       for (i = 0; i < side_sav_len; i++) {
+       for (i = 0; i < length; i++) {
+               const struct side_type *elem_type = side_ptr_get(type_gather->u.side_vla.type.elem_type);
+
+               switch (side_enum_get(elem_type->type)) {
+               case SIDE_TYPE_GATHER_VLA:
+                       fprintf(stderr, "<gather VLA only supported within gather structures>\n");
+                       abort();
+               default:
+                       break;
+               }
                printf("%s", i ? ", " : "");
-               tracer_print_type(type_desc->u.side_vla.elem_type, &sav[i]);
+               ptr += tracer_print_gather_type(elem_type, ptr);
        }
        printf(" ]");
+       return tracer_gather_size(access_mode, ptr - orig_ptr);
 }
 
 struct tracer_visitor_priv {
-       const struct side_type_description *elem_type;
+       const struct side_type *elem_type;
        int i;
 };
 
 static
 enum side_visitor_status tracer_write_elem_cb(const struct side_tracer_visitor_ctx *tracer_ctx,
-                       const struct side_arg_vec *elem)
+                       const struct side_arg *elem)
 {
-       struct tracer_visitor_priv *tracer_priv = tracer_ctx->priv;
+       struct tracer_visitor_priv *tracer_priv = (struct tracer_visitor_priv *) tracer_ctx->priv;
 
        printf("%s", tracer_priv->i++ ? ", " : "");
        tracer_print_type(tracer_priv->elem_type, elem);
@@ -1374,23 +1792,29 @@ enum side_visitor_status tracer_write_elem_cb(const struct side_tracer_visitor_c
 }
 
 static
-void tracer_print_vla_visitor(const struct side_type_description *type_desc, void *app_ctx)
+void tracer_print_vla_visitor(const struct side_type *type_desc, struct side_arg_vla_visitor *vla_visitor)
 {
+       void *app_ctx;
        enum side_visitor_status status;
        struct tracer_visitor_priv tracer_priv = {
-               .elem_type = type_desc->u.side_vla_visitor.elem_type,
+               .elem_type = side_ptr_get(type_desc->u.side_vla_visitor.elem_type),
                .i = 0,
        };
        const struct side_tracer_visitor_ctx tracer_ctx = {
                .write_elem = tracer_write_elem_cb,
                .priv = &tracer_priv,
        };
+       side_visitor_func func;
 
-       print_attributes("attr", ":", type_desc->u.side_vla_visitor.attr, type_desc->u.side_vla_visitor.nr_attr);
+       if (!vla_visitor)
+               abort();
+       app_ctx = side_ptr_get(vla_visitor->app_ctx);
+       print_attributes("attr", ":", side_ptr_get(type_desc->u.side_vla_visitor.attr), type_desc->u.side_vla_visitor.nr_attr);
        printf("%s", type_desc->u.side_vla_visitor.nr_attr ? ", " : "");
        printf("elements: ");
        printf("[ ");
-       status = type_desc->u.side_vla_visitor.visitor(&tracer_ctx, app_ctx);
+       func = side_ptr_get(type_desc->u.side_vla_visitor.visitor);
+       status = func(&tracer_ctx, app_ctx);
        switch (status) {
        case SIDE_VISITOR_STATUS_OK:
                break;
@@ -1401,254 +1825,19 @@ void tracer_print_vla_visitor(const struct side_type_description *type_desc, voi
        printf(" ]");
 }
 
-void tracer_print_array_fixint(const struct side_type_description *type_desc, const struct side_arg_vec *item)
-{
-       const struct side_type_description *elem_type = type_desc->u.side_array.elem_type;
-       uint32_t side_sav_len = type_desc->u.side_array.length;
-       void *p = item->u.side_array_fixint;
-       enum side_type side_type;
-       int i;
-
-       print_attributes("attr", ":", type_desc->u.side_array.attr, type_desc->u.side_array.nr_attr);
-       printf("%s", type_desc->u.side_array.nr_attr ? ", " : "");
-       printf("elements: ");
-       switch (item->type) {
-       case SIDE_TYPE_ARRAY_U8:
-               if (elem_type->type != SIDE_TYPE_U8)
-                       goto type_error;
-               break;
-       case SIDE_TYPE_ARRAY_U16:
-               if (elem_type->type != SIDE_TYPE_U16)
-                       goto type_error;
-               break;
-       case SIDE_TYPE_ARRAY_U32:
-               if (elem_type->type != SIDE_TYPE_U32)
-                       goto type_error;
-               break;
-       case SIDE_TYPE_ARRAY_U64:
-               if (elem_type->type != SIDE_TYPE_U64)
-                       goto type_error;
-               break;
-       case SIDE_TYPE_ARRAY_S8:
-               if (elem_type->type != SIDE_TYPE_S8)
-                       goto type_error;
-               break;
-       case SIDE_TYPE_ARRAY_S16:
-               if (elem_type->type != SIDE_TYPE_S16)
-                       goto type_error;
-               break;
-       case SIDE_TYPE_ARRAY_S32:
-               if (elem_type->type != SIDE_TYPE_S32)
-                       goto type_error;
-               break;
-       case SIDE_TYPE_ARRAY_S64:
-               if (elem_type->type != SIDE_TYPE_S64)
-                       goto type_error;
-               break;
-       case SIDE_TYPE_ARRAY_BYTE:
-               if (elem_type->type != SIDE_TYPE_BYTE)
-                       goto type_error;
-               break;
-       case SIDE_TYPE_ARRAY_POINTER32:
-               if (elem_type->type != SIDE_TYPE_POINTER32)
-                       goto type_error;
-       case SIDE_TYPE_ARRAY_POINTER64:
-               if (elem_type->type != SIDE_TYPE_POINTER64)
-                       goto type_error;
-               break;
-       default:
-               goto type_error;
-       }
-       side_type = elem_type->type;
-
-       printf("[ ");
-       for (i = 0; i < side_sav_len; i++) {
-               struct side_arg_vec sav_elem = {
-                       .type = side_type,
-               };
-
-               switch (side_type) {
-               case SIDE_TYPE_U8:
-                       sav_elem.u.integer_value.side_u8 = ((const uint8_t *) p)[i];
-                       break;
-               case SIDE_TYPE_S8:
-                       sav_elem.u.integer_value.side_s8 = ((const int8_t *) p)[i];
-                       break;
-               case SIDE_TYPE_U16:
-                       sav_elem.u.integer_value.side_u16 = ((const uint16_t *) p)[i];
-                       break;
-               case SIDE_TYPE_S16:
-                       sav_elem.u.integer_value.side_s16 = ((const int16_t *) p)[i];
-                       break;
-               case SIDE_TYPE_U32:
-                       sav_elem.u.integer_value.side_u32 = ((const uint32_t *) p)[i];
-                       break;
-               case SIDE_TYPE_S32:
-                       sav_elem.u.integer_value.side_s32 = ((const int32_t *) p)[i];
-                       break;
-               case SIDE_TYPE_U64:
-                       sav_elem.u.integer_value.side_u64 = ((const uint64_t *) p)[i];
-                       break;
-               case SIDE_TYPE_S64:
-                       sav_elem.u.integer_value.side_s64 = ((const int64_t *) p)[i];
-                       break;
-               case SIDE_TYPE_BYTE:
-                       sav_elem.u.side_byte = ((const uint8_t *) p)[i];
-                       break;
-               case SIDE_TYPE_POINTER32:
-                       sav_elem.u.integer_value.side_u32 = ((const uint32_t *) p)[i];
-                       break;
-               case SIDE_TYPE_POINTER64:
-                       sav_elem.u.integer_value.side_u64 = ((const uint64_t *) p)[i];
-                       break;
-
-               default:
-                       fprintf(stderr, "ERROR: Unexpected type\n");
-                       abort();
-               }
-
-               printf("%s", i ? ", " : "");
-               tracer_print_type(elem_type, &sav_elem);
-       }
-       printf(" ]");
-       return;
-
-type_error:
-       fprintf(stderr, "ERROR: type mismatch\n");
-       abort();
-}
-
-void tracer_print_vla_fixint(const struct side_type_description *type_desc, const struct side_arg_vec *item)
-{
-       const struct side_type_description *elem_type = type_desc->u.side_vla.elem_type;
-       uint32_t side_sav_len = item->u.side_vla_fixint.length;
-       void *p = item->u.side_vla_fixint.p;
-       enum side_type side_type;
-       int i;
-
-       print_attributes("attr", ":", type_desc->u.side_vla.attr, type_desc->u.side_vla.nr_attr);
-       printf("%s", type_desc->u.side_vla.nr_attr ? ", " : "");
-       printf("elements: ");
-       switch (item->type) {
-       case SIDE_TYPE_VLA_U8:
-               if (elem_type->type != SIDE_TYPE_U8)
-                       goto type_error;
-               break;
-       case SIDE_TYPE_VLA_U16:
-               if (elem_type->type != SIDE_TYPE_U16)
-                       goto type_error;
-               break;
-       case SIDE_TYPE_VLA_U32:
-               if (elem_type->type != SIDE_TYPE_U32)
-                       goto type_error;
-               break;
-       case SIDE_TYPE_VLA_U64:
-               if (elem_type->type != SIDE_TYPE_U64)
-                       goto type_error;
-               break;
-       case SIDE_TYPE_VLA_S8:
-               if (elem_type->type != SIDE_TYPE_S8)
-                       goto type_error;
-               break;
-       case SIDE_TYPE_VLA_S16:
-               if (elem_type->type != SIDE_TYPE_S16)
-                       goto type_error;
-               break;
-       case SIDE_TYPE_VLA_S32:
-               if (elem_type->type != SIDE_TYPE_S32)
-                       goto type_error;
-               break;
-       case SIDE_TYPE_VLA_S64:
-               if (elem_type->type != SIDE_TYPE_S64)
-                       goto type_error;
-               break;
-       case SIDE_TYPE_VLA_BYTE:
-               if (elem_type->type != SIDE_TYPE_BYTE)
-                       goto type_error;
-               break;
-       case SIDE_TYPE_VLA_POINTER32:
-               if (elem_type->type != SIDE_TYPE_POINTER32)
-                       goto type_error;
-       case SIDE_TYPE_VLA_POINTER64:
-               if (elem_type->type != SIDE_TYPE_POINTER64)
-                       goto type_error;
-               break;
-       default:
-               goto type_error;
-       }
-       side_type = elem_type->type;
-
-       printf("[ ");
-       for (i = 0; i < side_sav_len; i++) {
-               struct side_arg_vec sav_elem = {
-                       .type = side_type,
-               };
-
-               switch (side_type) {
-               case SIDE_TYPE_U8:
-                       sav_elem.u.integer_value.side_u8 = ((const uint8_t *) p)[i];
-                       break;
-               case SIDE_TYPE_S8:
-                       sav_elem.u.integer_value.side_s8 = ((const int8_t *) p)[i];
-                       break;
-               case SIDE_TYPE_U16:
-                       sav_elem.u.integer_value.side_u16 = ((const uint16_t *) p)[i];
-                       break;
-               case SIDE_TYPE_S16:
-                       sav_elem.u.integer_value.side_s16 = ((const int16_t *) p)[i];
-                       break;
-               case SIDE_TYPE_U32:
-                       sav_elem.u.integer_value.side_u32 = ((const uint32_t *) p)[i];
-                       break;
-               case SIDE_TYPE_S32:
-                       sav_elem.u.integer_value.side_s32 = ((const int32_t *) p)[i];
-                       break;
-               case SIDE_TYPE_U64:
-                       sav_elem.u.integer_value.side_u64 = ((const uint64_t *) p)[i];
-                       break;
-               case SIDE_TYPE_S64:
-                       sav_elem.u.integer_value.side_s64 = ((const int64_t *) p)[i];
-                       break;
-               case SIDE_TYPE_BYTE:
-                       sav_elem.u.side_byte = ((const uint8_t *) p)[i];
-                       break;
-               case SIDE_TYPE_POINTER32:
-                       sav_elem.u.integer_value.side_u32 = ((const uint32_t *) p)[i];
-                       break;
-               case SIDE_TYPE_POINTER64:
-                       sav_elem.u.integer_value.side_u64 = ((const uint64_t *) p)[i];
-                       break;
-
-               default:
-                       fprintf(stderr, "ERROR: Unexpected type\n");
-                       abort();
-               }
-
-               printf("%s", i ? ", " : "");
-               tracer_print_type(elem_type, &sav_elem);
-       }
-       printf(" ]");
-       return;
-
-type_error:
-       fprintf(stderr, "ERROR: type mismatch\n");
-       abort();
-}
-
 static
-void tracer_print_dynamic_struct(const struct side_arg_dynamic_event_struct *dynamic_struct)
+void tracer_print_dynamic_struct(const struct side_arg_dynamic_struct *dynamic_struct)
 {
-       const struct side_arg_dynamic_event_field *fields = dynamic_struct->fields;
-       uint32_t len = dynamic_struct->len;
-       int i;
+       const struct side_arg_dynamic_field *fields = side_ptr_get(dynamic_struct->fields);
+       uint32_t i, len = dynamic_struct->len;
 
-       print_attributes("attr", "::", dynamic_struct->attr, dynamic_struct->nr_attr);
+       print_attributes("attr", "::", side_ptr_get(dynamic_struct->attr), dynamic_struct->nr_attr);
        printf("%s", dynamic_struct->nr_attr ? ", " : "");
        printf("fields:: ");
        printf("[ ");
        for (i = 0; i < len; i++) {
                printf("%s", i ? ", " : "");
-               printf("%s:: ", fields[i].field_name);
+               printf("%s:: ", side_ptr_get(fields[i].field_name));
                tracer_print_dynamic(&fields[i].elem);
        }
        printf(" ]");
@@ -1661,20 +1850,21 @@ struct tracer_dynamic_struct_visitor_priv {
 static
 enum side_visitor_status tracer_dynamic_struct_write_elem_cb(
                        const struct side_tracer_dynamic_struct_visitor_ctx *tracer_ctx,
-                       const struct side_arg_dynamic_event_field *dynamic_field)
+                       const struct side_arg_dynamic_field *dynamic_field)
 {
-       struct tracer_dynamic_struct_visitor_priv *tracer_priv = tracer_ctx->priv;
+       struct tracer_dynamic_struct_visitor_priv *tracer_priv =
+               (struct tracer_dynamic_struct_visitor_priv *) tracer_ctx->priv;
 
        printf("%s", tracer_priv->i++ ? ", " : "");
-       printf("%s:: ", dynamic_field->field_name);
+       printf("%s:: ", side_ptr_get(dynamic_field->field_name));
        tracer_print_dynamic(&dynamic_field->elem);
        return SIDE_VISITOR_STATUS_OK;
 }
 
 static
-void tracer_print_dynamic_struct_visitor(const struct side_arg_dynamic_vec *item)
+void tracer_print_dynamic_struct_visitor(const struct side_arg *item)
 {
-       enum side_visitor_status status;
+       struct side_arg_dynamic_struct_visitor *dynamic_struct_visitor;
        struct tracer_dynamic_struct_visitor_priv tracer_priv = {
                .i = 0,
        };
@@ -1682,13 +1872,18 @@ void tracer_print_dynamic_struct_visitor(const struct side_arg_dynamic_vec *item
                .write_field = tracer_dynamic_struct_write_elem_cb,
                .priv = &tracer_priv,
        };
-       void *app_ctx = item->u.side_dynamic_struct_visitor.app_ctx;
+       enum side_visitor_status status;
+       void *app_ctx;
 
-       print_attributes("attr", "::", item->u.side_dynamic_struct_visitor.attr, item->u.side_dynamic_struct_visitor.nr_attr);
-       printf("%s", item->u.side_dynamic_struct_visitor.nr_attr ? ", " : "");
+       dynamic_struct_visitor = side_ptr_get(item->u.side_dynamic.side_dynamic_struct_visitor);
+       if (!dynamic_struct_visitor)
+               abort();
+       app_ctx = side_ptr_get(dynamic_struct_visitor->app_ctx);
+       print_attributes("attr", "::", side_ptr_get(dynamic_struct_visitor->attr), dynamic_struct_visitor->nr_attr);
+       printf("%s", dynamic_struct_visitor->nr_attr ? ", " : "");
        printf("fields:: ");
        printf("[ ");
-       status = item->u.side_dynamic_struct_visitor.visitor(&tracer_ctx, app_ctx);
+       status = side_ptr_get(dynamic_struct_visitor->visitor)(&tracer_ctx, app_ctx);
        switch (status) {
        case SIDE_VISITOR_STATUS_OK:
                break;
@@ -1700,13 +1895,12 @@ void tracer_print_dynamic_struct_visitor(const struct side_arg_dynamic_vec *item
 }
 
 static
-void tracer_print_dynamic_vla(const struct side_arg_dynamic_vec_vla *vla)
+void tracer_print_dynamic_vla(const struct side_arg_dynamic_vla *vla)
 {
-       const struct side_arg_dynamic_vec *sav = vla->sav;
-       uint32_t side_sav_len = vla->len;
-       int i;
+       const struct side_arg *sav = side_ptr_get(vla->sav);
+       uint32_t i, side_sav_len = vla->len;
 
-       print_attributes("attr", "::", vla->attr, vla->nr_attr);
+       print_attributes("attr", "::", side_ptr_get(vla->attr), vla->nr_attr);
        printf("%s", vla->nr_attr ? ", " : "");
        printf("elements:: ");
        printf("[ ");
@@ -1723,10 +1917,11 @@ struct tracer_dynamic_vla_visitor_priv {
 
 static
 enum side_visitor_status tracer_dynamic_vla_write_elem_cb(
-                       const struct side_tracer_dynamic_vla_visitor_ctx *tracer_ctx,
-                       const struct side_arg_dynamic_vec *elem)
+                       const struct side_tracer_visitor_ctx *tracer_ctx,
+                       const struct side_arg *elem)
 {
-       struct tracer_dynamic_vla_visitor_priv *tracer_priv = tracer_ctx->priv;
+       struct tracer_dynamic_vla_visitor_priv *tracer_priv =
+               (struct tracer_dynamic_vla_visitor_priv *) tracer_ctx->priv;
 
        printf("%s", tracer_priv->i++ ? ", " : "");
        tracer_print_dynamic(elem);
@@ -1734,23 +1929,28 @@ enum side_visitor_status tracer_dynamic_vla_write_elem_cb(
 }
 
 static
-void tracer_print_dynamic_vla_visitor(const struct side_arg_dynamic_vec *item)
+void tracer_print_dynamic_vla_visitor(const struct side_arg *item)
 {
-       enum side_visitor_status status;
+       struct side_arg_dynamic_vla_visitor *dynamic_vla_visitor;
        struct tracer_dynamic_vla_visitor_priv tracer_priv = {
                .i = 0,
        };
-       const struct side_tracer_dynamic_vla_visitor_ctx tracer_ctx = {
+       const struct side_tracer_visitor_ctx tracer_ctx = {
                .write_elem = tracer_dynamic_vla_write_elem_cb,
                .priv = &tracer_priv,
        };
-       void *app_ctx = item->u.side_dynamic_vla_visitor.app_ctx;
+       enum side_visitor_status status;
+       void *app_ctx;
 
-       print_attributes("attr", "::", item->u.side_dynamic_vla_visitor.attr, item->u.side_dynamic_vla_visitor.nr_attr);
-       printf("%s", item->u.side_dynamic_vla_visitor.nr_attr ? ", " : "");
+       dynamic_vla_visitor = side_ptr_get(item->u.side_dynamic.side_dynamic_vla_visitor);
+       if (!dynamic_vla_visitor)
+               abort();
+       app_ctx = side_ptr_get(dynamic_vla_visitor->app_ctx);
+       print_attributes("attr", "::", side_ptr_get(dynamic_vla_visitor->attr), dynamic_vla_visitor->nr_attr);
+       printf("%s", dynamic_vla_visitor->nr_attr ? ", " : "");
        printf("elements:: ");
        printf("[ ");
-       status = item->u.side_dynamic_vla_visitor.visitor(&tracer_ctx, app_ctx);
+       status = side_ptr_get(dynamic_vla_visitor->visitor)(&tracer_ctx, app_ctx);
        switch (status) {
        case SIDE_VISITOR_STATUS_OK:
                break;
@@ -1762,155 +1962,57 @@ void tracer_print_dynamic_vla_visitor(const struct side_arg_dynamic_vec *item)
 }
 
 static
-void tracer_print_dynamic(const struct side_arg_dynamic_vec *item)
+void tracer_print_dynamic(const struct side_arg *item)
 {
        printf("{ ");
-       switch (item->dynamic_type) {
-       case SIDE_DYNAMIC_TYPE_NULL:
-               tracer_print_type_header("::", item->u.side_basic.attr, item->u.side_basic.nr_attr);
+       switch (side_enum_get(item->type)) {
+               /* Dynamic basic types */
+       case SIDE_TYPE_DYNAMIC_NULL:
+               tracer_print_type_header("::", side_ptr_get(item->u.side_dynamic.side_null.attr),
+                       item->u.side_dynamic.side_null.nr_attr);
                printf("<NULL TYPE>");
                break;
-       case SIDE_DYNAMIC_TYPE_BOOL:
-               tracer_print_type_header("::", item->u.side_basic.attr, item->u.side_basic.nr_attr);
-               printf("%s", item->u.side_basic.u.side_bool ? "true" : "false");
-               break;
-       case SIDE_DYNAMIC_TYPE_U8:
-       case SIDE_DYNAMIC_TYPE_U16:
-       case SIDE_DYNAMIC_TYPE_U32:
-       case SIDE_DYNAMIC_TYPE_U64:
-       case SIDE_DYNAMIC_TYPE_S8:
-       case SIDE_DYNAMIC_TYPE_S16:
-       case SIDE_DYNAMIC_TYPE_S32:
-       case SIDE_DYNAMIC_TYPE_S64:
-               tracer_print_type_integer("::", &item->u.side_integer.type,
-                                       &item->u.side_integer.value);
-               break;
-       case SIDE_DYNAMIC_TYPE_BYTE:
-               tracer_print_type_header("::", item->u.side_basic.attr, item->u.side_basic.nr_attr);
-               printf("0x%" PRIx8, item->u.side_basic.u.side_byte);
-               break;
-       case SIDE_DYNAMIC_TYPE_POINTER32:
-       {
-               uint32_t v;
-
-               v = item->u.side_integer.value.side_u32;
-               if (dynamic_type_to_host_reverse_bo(item))
-                       v = side_bswap_32(v);
-               tracer_print_type_header("::", item->u.side_integer.type.attr, item->u.side_integer.type.nr_attr);
-               printf("0x%" PRIx32, v);
-               break;
-       }
-
-       case SIDE_DYNAMIC_TYPE_POINTER64:
-       {
-               uint64_t v;
-
-               v = item->u.side_integer.value.side_u64;
-               if (dynamic_type_to_host_reverse_bo(item))
-                       v = side_bswap_64(v);
-               tracer_print_type_header("::", item->u.side_integer.type.attr, item->u.side_integer.type.nr_attr);
-               printf("0x%" PRIx64, v);
+       case SIDE_TYPE_DYNAMIC_BOOL:
+               tracer_print_type_bool("::", &item->u.side_dynamic.side_bool.type, &item->u.side_dynamic.side_bool.value, 0);
                break;
-       }
-
-       case SIDE_DYNAMIC_TYPE_FLOAT_BINARY16:
-       {
-#if __HAVE_FLOAT16
-               union {
-                       _Float16 f;
-                       uint16_t u;
-               } float16 = {
-                       .f = item->u.side_float.value.side_float_binary16,
-               };
-
-               if (dynamic_type_to_host_reverse_bo(item))
-                       float16.u = side_bswap_16(float16.u);
-               tracer_print_type_header("::", item->u.side_float.type.attr, item->u.side_float.type.nr_attr);
-               printf("%g", (double) float16.f);
+       case SIDE_TYPE_DYNAMIC_INTEGER:
+               tracer_print_type_integer("::", &item->u.side_dynamic.side_integer.type, &item->u.side_dynamic.side_integer.value, 0,
+                               TRACER_DISPLAY_BASE_10);
                break;
-#else
-               fprintf(stderr, "ERROR: Unsupported binary16 float type\n");
-               abort();
-#endif
-       }
-       case SIDE_DYNAMIC_TYPE_FLOAT_BINARY32:
-       {
-#if __HAVE_FLOAT32
-               union {
-                       _Float32 f;
-                       uint32_t u;
-               } float32 = {
-                       .f = item->u.side_float.value.side_float_binary32,
-               };
-
-               if (dynamic_type_to_host_reverse_bo(item))
-                       float32.u = side_bswap_32(float32.u);
-               tracer_print_type_header("::", item->u.side_float.type.attr, item->u.side_float.type.nr_attr);
-               printf("%g", (double) float32.f);
+       case SIDE_TYPE_DYNAMIC_BYTE:
+               tracer_print_type_header("::", side_ptr_get(item->u.side_dynamic.side_byte.type.attr), item->u.side_dynamic.side_byte.type.nr_attr);
+               printf("0x%" PRIx8, item->u.side_dynamic.side_byte.value);
                break;
-#else
-               fprintf(stderr, "ERROR: Unsupported binary32 float type\n");
-               abort();
-#endif
-       }
-       case SIDE_DYNAMIC_TYPE_FLOAT_BINARY64:
-       {
-#if __HAVE_FLOAT64
-               union {
-                       _Float64 f;
-                       uint64_t u;
-               } float64 = {
-                       .f = item->u.side_float.value.side_float_binary64,
-               };
-
-               if (dynamic_type_to_host_reverse_bo(item))
-                       float64.u = side_bswap_64(float64.u);
-               tracer_print_type_header("::", item->u.side_float.type.attr, item->u.side_float.type.nr_attr);
-               printf("%g", (double) float64.f);
+       case SIDE_TYPE_DYNAMIC_POINTER:
+               tracer_print_type_integer("::", &item->u.side_dynamic.side_integer.type, &item->u.side_dynamic.side_integer.value, 0,
+                               TRACER_DISPLAY_BASE_16);
                break;
-#else
-               fprintf(stderr, "ERROR: Unsupported binary64 float type\n");
-               abort();
-#endif
-       }
-       case SIDE_DYNAMIC_TYPE_FLOAT_BINARY128:
-       {
-#if __HAVE_FLOAT128
-               union {
-                       _Float128 f;
-                       char arr[16];
-               } float128 = {
-                       .f = item->u.side_float.value.side_float_binary128,
-               };
-
-               if (dynamic_type_to_host_reverse_bo(item))
-                       side_bswap_128p(float128.arr);
-               tracer_print_type_header("::", item->u.side_float.type.attr, item->u.side_float.type.nr_attr);
-               printf("%Lg", (long double) float128.f);
+       case SIDE_TYPE_DYNAMIC_FLOAT:
+               tracer_print_type_float("::", &item->u.side_dynamic.side_float.type,
+                                       &item->u.side_dynamic.side_float.value);
                break;
-#else
-               fprintf(stderr, "ERROR: Unsupported binary128 float type\n");
-               abort();
-#endif
-       }
-       case SIDE_DYNAMIC_TYPE_STRING:
-               tracer_print_type_header("::", item->u.side_basic.attr, item->u.side_basic.nr_attr);
-               printf("\"%s\"", (const char *)(uintptr_t) item->u.side_basic.u.string);
+       case SIDE_TYPE_DYNAMIC_STRING:
+               tracer_print_type_header("::", side_ptr_get(item->u.side_dynamic.side_string.type.attr), item->u.side_dynamic.side_string.type.nr_attr);
+               tracer_print_string((const char *)(uintptr_t) item->u.side_dynamic.side_string.value,
+                               item->u.side_dynamic.side_string.type.unit_size,
+                               side_enum_get(item->u.side_dynamic.side_string.type.byte_order), NULL);
                break;
-       case SIDE_DYNAMIC_TYPE_STRUCT:
-               tracer_print_dynamic_struct(item->u.side_dynamic_struct);
+
+               /* Dynamic compound types */
+       case SIDE_TYPE_DYNAMIC_STRUCT:
+               tracer_print_dynamic_struct(side_ptr_get(item->u.side_dynamic.side_dynamic_struct));
                break;
-       case SIDE_DYNAMIC_TYPE_STRUCT_VISITOR:
+       case SIDE_TYPE_DYNAMIC_STRUCT_VISITOR:
                tracer_print_dynamic_struct_visitor(item);
                break;
-       case SIDE_DYNAMIC_TYPE_VLA:
-               tracer_print_dynamic_vla(item->u.side_dynamic_vla);
+       case SIDE_TYPE_DYNAMIC_VLA:
+               tracer_print_dynamic_vla(side_ptr_get(item->u.side_dynamic.side_dynamic_vla));
                break;
-       case SIDE_DYNAMIC_TYPE_VLA_VISITOR:
+       case SIDE_TYPE_DYNAMIC_VLA_VISITOR:
                tracer_print_dynamic_vla_visitor(item);
                break;
        default:
-               fprintf(stderr, "<UNKNOWN TYPE>");
+               fprintf(stderr, "<UNKNOWN TYPE>\n");
                abort();
        }
        printf(" }");
@@ -1918,23 +2020,22 @@ void tracer_print_dynamic(const struct side_arg_dynamic_vec *item)
 
 static
 void tracer_print_static_fields(const struct side_event_description *desc,
-               const struct side_arg_vec_description *sav_desc,
-               int *nr_items)
+               const struct side_arg_vec *side_arg_vec,
+               uint32_t *nr_items)
 {
-       const struct side_arg_vec *sav = sav_desc->sav;
-       uint32_t side_sav_len = sav_desc->len;
-       int i;
+       const struct side_arg *sav = side_ptr_get(side_arg_vec->sav);
+       uint32_t i, side_sav_len = side_arg_vec->len;
 
-       printf("provider: %s, event: %s", desc->provider_name, desc->event_name);
+       printf("provider: %s, event: %s", side_ptr_get(desc->provider_name), side_ptr_get(desc->event_name));
        if (desc->nr_fields != side_sav_len) {
                fprintf(stderr, "ERROR: number of fields mismatch between description and arguments\n");
                abort();
        }
-       print_attributes(", attr", ":", desc->attr, desc->nr_attr);
+       print_attributes(", attr", ":", side_ptr_get(desc->attr), desc->nr_attr);
        printf("%s", side_sav_len ? ", fields: [ " : "");
        for (i = 0; i < side_sav_len; i++) {
                printf("%s", i ? ", " : "");
-               tracer_print_field(&desc->fields[i], &sav[i]);
+               tracer_print_field(&side_ptr_get(desc->fields)[i], &sav[i]);
        }
        if (nr_items)
                *nr_items = i;
@@ -1942,44 +2043,47 @@ void tracer_print_static_fields(const struct side_event_description *desc,
                printf(" ]");
 }
 
+static
 void tracer_call(const struct side_event_description *desc,
-               const struct side_arg_vec_description *sav_desc,
+               const struct side_arg_vec *side_arg_vec,
                void *priv __attribute__((unused)))
 {
-       int nr_fields = 0;
+       uint32_t nr_fields = 0;
 
-       tracer_print_static_fields(desc, sav_desc, &nr_fields);
+       tracer_print_static_fields(desc, side_arg_vec, &nr_fields);
        printf("\n");
 }
 
+static
 void tracer_call_variadic(const struct side_event_description *desc,
-               const struct side_arg_vec_description *sav_desc,
-               const struct side_arg_dynamic_event_struct *var_struct,
+               const struct side_arg_vec *side_arg_vec,
+               const struct side_arg_dynamic_struct *var_struct,
                void *priv __attribute__((unused)))
 {
-       uint32_t var_struct_len = var_struct->len;
-       int nr_fields = 0, i;
+       uint32_t nr_fields = 0, i, var_struct_len = var_struct->len;
 
-       tracer_print_static_fields(desc, sav_desc, &nr_fields);
+       tracer_print_static_fields(desc, side_arg_vec, &nr_fields);
 
        if (side_unlikely(!(desc->flags & SIDE_EVENT_FLAG_VARIADIC))) {
                fprintf(stderr, "ERROR: unexpected non-variadic event description\n");
                abort();
        }
-       print_attributes(", attr ", "::", var_struct->attr, var_struct->nr_attr);
+       print_attributes(", attr ", "::", side_ptr_get(var_struct->attr), var_struct->nr_attr);
        printf("%s", var_struct_len ? ", fields:: [ " : "");
        for (i = 0; i < var_struct_len; i++, nr_fields++) {
                printf("%s", i ? ", " : "");
-               printf("%s:: ", var_struct->fields[i].field_name);
-               tracer_print_dynamic(&var_struct->fields[i].elem);
+               printf("%s:: ", side_ptr_get(side_ptr_get(var_struct->fields)[i].field_name));
+               tracer_print_dynamic(&side_ptr_get(var_struct->fields)[i].elem);
        }
        if (i)
                printf(" ]");
        printf("\n");
 }
 
+static
 void tracer_event_notification(enum side_tracer_notification notif,
-               struct side_event_description **events, uint32_t nr_events, void *priv)
+               struct side_event_description **events, uint32_t nr_events,
+               void *priv __attribute__((unused)))
 {
        uint32_t i;
        int ret;
@@ -1993,9 +2097,28 @@ void tracer_event_notification(enum side_tracer_notification notif,
                /* Skip NULL pointers */
                if (!event)
                        continue;
+               if (event->version != SIDE_EVENT_DESCRIPTION_ABI_VERSION) {
+                       printf("Error: event description ABI version (%u) does not match the version supported by the tracer (%u)\n",
+                               event->version, SIDE_EVENT_DESCRIPTION_ABI_VERSION);
+                               return;
+               }
                printf("provider: %s, event: %s\n",
-                       event->provider_name, event->event_name);
-               if  (notif == SIDE_TRACER_NOTIFICATION_INSERT_EVENTS) {
+                       side_ptr_get(event->provider_name), side_ptr_get(event->event_name));
+               if (event->struct_size != side_offsetofend(struct side_event_description, side_event_description_orig_abi_last)) {
+                       printf("Warning: Event %s.%s description contains fields unknown to the tracer\n",
+                               side_ptr_get(event->provider_name), side_ptr_get(event->event_name));
+               }
+               if (notif == SIDE_TRACER_NOTIFICATION_INSERT_EVENTS) {
+                       if (event->nr_side_type_label > _NR_SIDE_TYPE_LABEL) {
+                               printf("Warning: event %s:%s may contain unknown field types (%u unknown types)\n",
+                                       side_ptr_get(event->provider_name), side_ptr_get(event->event_name),
+                                       event->nr_side_type_label - _NR_SIDE_TYPE_LABEL);
+                       }
+                       if (event->nr_side_attr_type > _NR_SIDE_ATTR_TYPE) {
+                               printf("Warning: event %s:%s may contain unknown attribute types (%u unknown types)\n",
+                                       side_ptr_get(event->provider_name), side_ptr_get(event->event_name),
+                                       event->nr_side_attr_type - _NR_SIDE_ATTR_TYPE);
+                       }
                        if (event->flags & SIDE_EVENT_FLAG_VARIADIC) {
                                ret = side_tracer_callback_variadic_register(event, tracer_call_variadic, NULL);
                                if (ret)
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