pretty print tracer: Use argument vector visitor
[libside.git] / src / tracer.c
index f8b8bedcac55ec933ab96db3fe1a11a801d4381b..a10dded6fa827a92cad900cd7728aaffee0550eb 100644 (file)
@@ -9,9 +9,17 @@
 #include <stdio.h>
 #include <stdbool.h>
 #include <string.h>
+#include <iconv.h>
 
 #include <side/trace.h>
 
+#include "visit-arg-vec.h"
+
+/* TODO: optionally print caller address. */
+static bool print_caller = false;
+
+#define MAX_NESTING    32
+
 enum tracer_display_base {
        TRACER_DISPLAY_BASE_2,
        TRACER_DISPLAY_BASE_8,
@@ -19,33 +27,172 @@ 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];
+};
+
+struct print_ctx {
+       int nesting;                    /* Keep track of nesting, useful for tabulations. */
+       int item_nr[MAX_NESTING];       /* Item number in current nesting level, useful for comma-separated lists. */
+};
+
 static struct side_tracer_handle *tracer_handle;
 
+static uint64_t tracer_key;
+
 static
-void tracer_print_struct(const struct side_type_description *type_desc, const struct side_arg_vec_description *sav_desc);
-static
-void tracer_print_struct_sg(const struct side_type_description *type_desc, void *ptr);
-static
-void tracer_print_array(const struct side_type_description *type_desc, const struct side_arg_vec_description *sav_desc);
-static
-void tracer_print_vla(const struct side_type_description *type_desc, const struct side_arg_vec_description *sav_desc);
-static
-void tracer_print_vla_visitor(const struct side_type_description *type_desc, void *app_ctx);
-static
-void tracer_print_array_fixint(const struct side_type_description *type_desc, const struct side_arg_vec *item);
+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, input_size;
+       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;
+               input_size = 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;
+               input_size = 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 = input_size;
+       *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_type_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 +205,18 @@ 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 +229,18 @@ 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 +249,23 @@ 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 +282,22 @@ 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_basic.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_basic.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_basic.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_basic.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 +311,15 @@ 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 +332,14 @@ 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 +374,9 @@ 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_type_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>");
@@ -284,116 +389,167 @@ 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;
-       printf("%s%s [ ", prefix_str, separator);
+       printf("%s%s [", prefix_str, separator);
        for (i = 0; i < nr_attr; i++) {
-               printf("%s", i ? ", " : "");
+               printf("%s", i ? ", " : " ");
                tracer_print_attr_type(separator, &attr[i]);
        }
        printf(" ]");
 }
 
 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_type_string(side_ptr_get(mapping->label.p), mapping->label.unit_size,
+                               side_enum_get(mapping->label.byte_order), NULL);
                }
        }
        if (!print_count)
@@ -402,443 +558,339 @@ 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)
+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 print_integer_binary(uint64_t v[NR_SIDE_INTEGER128_SPLIT], int bits)
 {
-       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) {
-       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);
-               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;
-               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;
-               break;
-       default:
-               fprintf(stderr, "ERROR: Unexpected enum element type\n");
-               abort();
-       }
-
-       print_attributes("attr", ":", 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];
-               bool match = false;
-               uint64_t bit;
+       int bit;
 
-               if (mapping->range_end < mapping->range_begin) {
-                       fprintf(stderr, "ERROR: Unexpected enum bitmap range: %" PRIu64 "-%" PRIu64 "\n",
-                               mapping->range_begin, mapping->range_end);
-                       abort();
-               }
-               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 (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))) {
-                                       match = true;
-                                       goto match;
-                               }
-                               break;
-                       }
-                       default:
-                               abort();
-                       }
-               }
-match:
-               if (match) {
-                       printf("%s", print_count++ ? ", " : "");
-                       printf("\"%s\"", mapping->label);
+       printf("0b");
+       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;
        }
-       if (!print_count)
-               printf("<NO LABEL>");
-       printf(" ]");
 }
 
 static
-void print_integer_binary(uint64_t v, int bits)
+void tracer_print_type_header(const char *separator,
+               const struct side_attr *attr, uint32_t nr_attr)
 {
-       int i;
-
-       printf("0b");
-       v <<= 64 - bits;
-       for (i = 0; i < bits; i++) {
-               printf("%c", v & (1ULL << 63) ? '1' : '0');
-               v <<= 1;
-       }
+       print_attributes("attr", separator, attr, nr_attr);
+       printf("%s", nr_attr ? ", " : "");
+       printf("value%s ", separator);
 }
 
 static
-void tracer_print_basic_type_header(const struct side_type_description *type_desc)
+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)
 {
-       print_attributes("attr", ":", type_desc->u.side_basic.attr, type_desc->u.side_basic.nr_attr);
-       printf("%s", type_desc->u.side_basic.nr_attr ? ", " : "");
-       printf("value: ");
-}
-
-static
-void tracer_print_type_integer(enum side_type type, const struct side_type_description *type_desc, const struct side_arg_vec *item)
-{
-       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_desc->u.side_integer.len_bits ||
-                       type_desc->u.side_integer.len_bits > type_desc->u.side_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_desc->u.side_integer.attr,
-                       type_desc->u.side_integer.nr_attr);
-       switch (type) {
-       case SIDE_TYPE_U8:
-               v.v_unsigned = item->u.integer_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 SIDE_TYPE_U16:
+       case 2:
        {
                uint16_t side_u16;
 
-               side_u16 = item->u.integer_value.side_u16;
-               if (type_to_host_reverse_bo(type_desc))
+               side_u16 = value->side_bool16;
+               if (reverse_bo)
                        side_u16 = side_bswap_16(side_u16);
-               v.v_unsigned = side_u16;
+               v = side_u16;
                break;
        }
-       case SIDE_TYPE_U32:
+       case 4:
        {
                uint32_t side_u32;
 
-               side_u32 = item->u.integer_value.side_u32;
-               if (type_to_host_reverse_bo(type_desc))
+               side_u32 = value->side_bool32;
+               if (reverse_bo)
                        side_u32 = side_bswap_32(side_u32);
-               v.v_unsigned = side_u32;
+               v = side_u32;
                break;
        }
-       case SIDE_TYPE_U64:
+       case 8:
        {
                uint64_t side_u64;
 
-               side_u64 = item->u.integer_value.side_u64;
-               if (type_to_host_reverse_bo(type_desc))
+               side_u64 = value->side_bool64;
+               if (reverse_bo)
                        side_u64 = side_bswap_64(side_u64);
-               v.v_unsigned = side_u64;
+               v = side_u64;
                break;
        }
-       case SIDE_TYPE_S8:
-               v.v_signed = item->u.integer_value.side_s8;
-               break;
-       case SIDE_TYPE_S16:
-       {
-               int16_t side_s16;
-
-               side_s16 = item->u.integer_value.side_s16;
-               if (type_to_host_reverse_bo(type_desc))
-                       side_s16 = side_bswap_16(side_s16);
-               v.v_unsigned = side_s16;
-               break;
+       default:
+               abort();
        }
-       case SIDE_TYPE_S32:
-       {
-               int32_t side_s32;
+       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_s32 = item->u.integer_value.side_s32;
-               if (type_to_host_reverse_bo(type_desc))
-                       side_s32 = side_bswap_32(side_s32);
-               v.v_unsigned = side_s32;
-               break;
-       }
-       case SIDE_TYPE_S64:
-       {
-               int64_t side_s64;
+/* 2^128 - 1 */
+#define U128_BASE_10_ARRAY_LEN sizeof("340282366920938463463374607431768211455")
+/* -2^127 */
+#define S128_BASE_10_ARRAY_LEN sizeof("-170141183460469231731687303715884105728")
 
-               side_s64 = item->u.integer_value.side_s64;
-               if (type_to_host_reverse_bo(type_desc))
-                       side_s64 = side_bswap_64(side_s64);
-               v.v_unsigned = side_s64;
-               break;
-       }
-       default:
-               abort();
+/*
+ * 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;
+               }
        }
-       if (type_desc->u.side_integer.len_bits < 64)
-               v.v_unsigned &= (1ULL << type_desc->u.side_integer.len_bits) - 1;
-       tracer_print_basic_type_header(type_desc);
-       switch (base) {
-       case TRACER_DISPLAY_BASE_2:
-               print_integer_binary(v.v_unsigned, type_desc->u.side_integer.len_bits);
-               break;
-       case TRACER_DISPLAY_BASE_8:
-               printf("0%" PRIo64, v.v_unsigned);
-               break;
-       case TRACER_DISPLAY_BASE_10:
-               if (type_desc->u.side_integer.signedness) {
-                       /* Sign-extend. */
-                       if (type_desc->u.side_integer.len_bits < 64) {
-                               if (v.v_unsigned & (1ULL << (type_desc->u.side_integer.len_bits - 1)))
-                                       v.v_unsigned |= ~((1ULL << type_desc->u.side_integer.len_bits) - 1);
-                       }
-                       printf("%" PRId64, v.v_signed);
-               } else {
-                       printf("%" PRIu64, v.v_unsigned);
+       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;
                }
-               break;
-       case TRACER_DISPLAY_BASE_16:
-               printf("0x%" PRIx64, v.v_unsigned);
-               break;
-       default:
-               abort();
        }
+       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';
 }
 
 static
-void tracer_print_type(const struct side_type_description *type_desc, const struct side_arg_vec *item)
+void s128_tostring_base_10(union int_value v, char str[S128_BASE_10_ARRAY_LEN])
 {
-       enum side_type type;
+       uint64_t low, high, tmp;
 
-       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;
-               }
-               break;
+       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;
+       }
 
-       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;
-               }
-               break;
+       /* Negative. */
 
-       case SIDE_TYPE_ENUM:
-               switch (item->type) {
-               case SIDE_TYPE_U8:
-               case SIDE_TYPE_U16:
-               case SIDE_TYPE_U32:
-               case SIDE_TYPE_U64:
-               case SIDE_TYPE_S8:
-               case SIDE_TYPE_S16:
-               case SIDE_TYPE_S32:
-               case SIDE_TYPE_S64:
-                       break;
-               default:
-                       fprintf(stderr, "ERROR: type mismatch between description and arguments\n");
-                       abort();
-                       break;
-               }
-               break;
+       /* 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);
+}
 
-       case SIDE_TYPE_ENUM_BITMAP:
-               switch (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_ARRAY:
-               case SIDE_TYPE_VLA:
-                       break;
-               default:
-                       fprintf(stderr, "ERROR: type mismatch between description and arguments\n");
-                       abort();
-                       break;
-               }
-               break;
+/* 2^128 - 1 */
+#define U128_BASE_8_ARRAY_LEN  sizeof("3777777777777777777777777777777777777777777")
 
-       default:
-               if (type_desc->type != item->type) {
-                       fprintf(stderr, "ERROR: type mismatch between description and arguments\n");
-                       abort();
+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;
        }
+       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';
+}
 
-       if (type_desc->type == SIDE_TYPE_ENUM || type_desc->type == SIDE_TYPE_ENUM_BITMAP)
-               type = type_desc->type;
-       else
-               type = item->type;
+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;
 
-       printf("{ ");
-       switch (type) {
-       case SIDE_TYPE_BOOL:
-               tracer_print_basic_type_header(type_desc);
-               printf("%s", item->u.side_bool ? "true" : "false");
+       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.u, len_bits);
                break;
+       case TRACER_DISPLAY_BASE_8:
+               /* 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];
 
-       case SIDE_TYPE_U8:
-       case SIDE_TYPE_U16:
-       case SIDE_TYPE_U32:
-       case SIDE_TYPE_U64:
-       case SIDE_TYPE_S8:
-       case SIDE_TYPE_S16:
-       case SIDE_TYPE_S32:
-       case SIDE_TYPE_S64:
-               tracer_print_type_integer(type, type_desc, item);
+                       u128_tostring_base_8(v, str);
+                       printf("0o%s", str);
+               }
                break;
-
-       case SIDE_TYPE_POINTER32:
-       {
-               uint32_t v;
-
-               v = item->u.integer_value.side_u32;
-               if (type_to_host_reverse_bo(type_desc))
-                       v = side_bswap_32(v);
-               tracer_print_basic_type_header(type_desc);
-               printf("0x%" PRIx32, v);
+       case TRACER_DISPLAY_BASE_10:
+               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 {
+                       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 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_basic_type_header(type_desc);
-               printf("0x%" PRIx64, v);
+       case TRACER_DISPLAY_BASE_16:
+               /* 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();
        }
-       case SIDE_TYPE_BYTE:
-               tracer_print_basic_type_header(type_desc);
-               printf("0x%" PRIx8, item->u.side_byte);
-               break;
-
-       case SIDE_TYPE_ENUM:
-               print_enum(type_desc, item);
-               break;
+}
 
-       case SIDE_TYPE_ENUM_BITMAP:
-               print_enum_bitmap(type_desc, item);
-               break;
+static
+void tracer_print_type_float(const char *separator,
+               const struct side_type_float *type_float,
+               const union side_float_value *value)
+{
+       bool reverse_bo;
 
-       case SIDE_TYPE_FLOAT_BINARY16:
+       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 = item->u.float_value.side_float_binary16,
+                       .f = value->side_float_binary16,
                };
 
-               if (type_to_host_reverse_bo(type_desc))
+               if (reverse_bo)
                        float16.u = side_bswap_16(float16.u);
-               tracer_print_basic_type_header(type_desc);
                printf("%g", (double) float16.f);
                break;
 #else
@@ -846,19 +898,18 @@ void tracer_print_type(const struct side_type_description *type_desc, const stru
                abort();
 #endif
        }
-       case SIDE_TYPE_FLOAT_BINARY32:
+       case 4:
        {
 #if __HAVE_FLOAT32
                union {
                        _Float32 f;
                        uint32_t u;
                } float32 = {
-                       .f = item->u.float_value.side_float_binary32,
+                       .f = value->side_float_binary32,
                };
 
-               if (type_to_host_reverse_bo(type_desc))
+               if (reverse_bo)
                        float32.u = side_bswap_32(float32.u);
-               tracer_print_basic_type_header(type_desc);
                printf("%g", (double) float32.f);
                break;
 #else
@@ -866,19 +917,18 @@ void tracer_print_type(const struct side_type_description *type_desc, const stru
                abort();
 #endif
        }
-       case SIDE_TYPE_FLOAT_BINARY64:
+       case 8:
        {
 #if __HAVE_FLOAT64
                union {
                        _Float64 f;
                        uint64_t u;
                } float64 = {
-                       .f = item->u.float_value.side_float_binary64,
+                       .f = value->side_float_binary64,
                };
 
-               if (type_to_host_reverse_bo(type_desc))
+               if (reverse_bo)
                        float64.u = side_bswap_64(float64.u);
-               tracer_print_basic_type_header(type_desc);
                printf("%g", (double) float64.f);
                break;
 #else
@@ -886,19 +936,18 @@ void tracer_print_type(const struct side_type_description *type_desc, const stru
                abort();
 #endif
        }
-       case SIDE_TYPE_FLOAT_BINARY128:
+       case 16:
        {
 #if __HAVE_FLOAT128
                union {
                        _Float128 f;
                        char arr[16];
                } float128 = {
-                       .f = item->u.float_value.side_float_binary128,
+                       .f = value->side_float_binary128,
                };
 
-               if (type_to_host_reverse_bo(type_desc))
+               if (reverse_bo)
                        side_bswap_128p(float128.arr);
-               tracer_print_basic_type_header(type_desc);
                printf("%Lg", (long double) float128.f);
                break;
 #else
@@ -906,1305 +955,771 @@ void tracer_print_type(const struct side_type_description *type_desc, const stru
                abort();
 #endif
        }
-       case SIDE_TYPE_STRING:
-               tracer_print_basic_type_header(type_desc);
-               printf("\"%s\"", (const char *)(uintptr_t) item->u.string);
-               break;
-       case SIDE_TYPE_STRUCT:
-               tracer_print_struct(type_desc, item->u.side_struct);
-               break;
-       case SIDE_TYPE_STRUCT_SG:
-               tracer_print_struct_sg(type_desc, item->u.side_struct_sg_ptr);
-               break;
-       case SIDE_TYPE_ARRAY:
-               tracer_print_array(type_desc, item->u.side_array);
-               break;
-       case SIDE_TYPE_VLA:
-               tracer_print_vla(type_desc, item->u.side_vla);
-               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);
-               break;
-       case SIDE_TYPE_DYNAMIC:
-               tracer_print_basic_type_header(type_desc);
-               tracer_print_dynamic(&item->u.dynamic);
-               break;
        default:
-               fprintf(stderr, "<UNKNOWN TYPE>");
+               fprintf(stderr, "ERROR: Unknown float size\n");
                abort();
        }
-       printf(" }");
 }
 
 static
-void tracer_print_field(const struct side_event_field *item_desc, const struct side_arg_vec *item)
+void push_nesting(struct print_ctx *ctx)
+{
+       if (++ctx->nesting >= MAX_NESTING) {
+               fprintf(stderr, "ERROR: Nesting too deep.\n");
+               abort();
+       }
+       ctx->item_nr[ctx->nesting] = 0;
+}
+
+static
+void pop_nesting(struct print_ctx *ctx)
+{
+       ctx->item_nr[ctx->nesting] = 0;
+       if (ctx->nesting-- <= 0) {
+               fprintf(stderr, "ERROR: Nesting underflow.\n");
+               abort();
+       }
+}
+
+static
+int get_nested_item_nr(struct print_ctx *ctx)
+{
+       return ctx->item_nr[ctx->nesting];
+}
+
+static
+void inc_nested_item_nr(struct print_ctx *ctx)
 {
-       printf("%s: ", item_desc->field_name);
-       tracer_print_type(&item_desc->side_type, item);
+       ctx->item_nr[ctx->nesting]++;
 }
 
 static
-void tracer_print_struct(const struct side_type_description *type_desc, const struct side_arg_vec_description *sav_desc)
+void tracer_print_event(enum side_type_visitor_location loc,
+               const struct side_event_description *desc,
+               const struct side_arg_vec *side_arg_vec,
+               const struct side_arg_dynamic_struct *var_struct __attribute__((unused)),
+               void *caller_addr, void *priv __attribute__((unused)))
 {
-       const struct side_arg_vec *sav = sav_desc->sav;
-       uint32_t side_sav_len = sav_desc->len;
-       int i;
+       uint32_t side_sav_len = side_arg_vec->len;
 
-       if (type_desc->u.side_struct->nr_fields != side_sav_len) {
-               fprintf(stderr, "ERROR: number of fields mismatch between description and arguments of structure\n");
+       if (desc->nr_fields != side_sav_len) {
+               fprintf(stderr, "ERROR: number of fields mismatch between description and arguments\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 ? ", " : "");
-       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]);
+
+       switch (loc) {
+       case SIDE_TYPE_VISITOR_BEFORE:
+               if (print_caller)
+                       printf("caller: [%p], ", caller_addr);
+               printf("provider: %s, event: %s",
+                       side_ptr_get(desc->provider_name),
+                       side_ptr_get(desc->event_name));
+               print_attributes(", attr", ":", side_ptr_get(desc->attr), desc->nr_attr);
+               break;
+       case SIDE_TYPE_VISITOR_AFTER:
+               printf("\n");
+               break;
        }
-       printf(" }");
 }
 
 static
-void tracer_print_sg_integer_type_header(const struct side_type_sg_description *sg_type)
+void tracer_print_static_fields(enum side_type_visitor_location loc,
+               const struct side_arg_vec *side_arg_vec,
+               void *priv)
 {
-       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: ");
+       struct print_ctx *ctx = (struct print_ctx *) priv;
+       uint32_t side_sav_len = side_arg_vec->len;
+
+       switch (loc) {
+       case SIDE_TYPE_VISITOR_BEFORE:
+               printf("%s", side_sav_len ? ", fields: {" : "");
+               push_nesting(ctx);
+               break;
+       case SIDE_TYPE_VISITOR_AFTER:
+               pop_nesting(ctx);
+               if (side_sav_len)
+                       printf(" }");
+               break;
+       }
 }
 
 static
-void tracer_print_sg_type(const struct side_type_sg_description *sg_type, void *_ptr)
+void tracer_print_variadic_fields(enum side_type_visitor_location loc,
+               const struct side_arg_dynamic_struct *var_struct,
+               void *priv)
 {
-       enum tracer_display_base base = TRACER_DISPLAY_BASE_10;
-       const char *ptr = (const char *) _ptr;
+       struct print_ctx *ctx = (struct print_ctx *) priv;
+       uint32_t var_struct_len = var_struct->len;
 
-       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 (loc) {
+       case SIDE_TYPE_VISITOR_BEFORE:
+               print_attributes(", attr ", "::", side_ptr_get(var_struct->attr), var_struct->nr_attr);
+               printf("%s", var_struct_len ? ", fields:: {" : "");
+               push_nesting(ctx);
                break;
-       default:
+       case SIDE_TYPE_VISITOR_AFTER:
+               pop_nesting(ctx);
+               if (var_struct_len)
+                       printf(" }");
                break;
        }
+}
 
-       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;
-
-                       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
+void tracer_print_field(enum side_type_visitor_location loc, const struct side_event_field *item_desc, void *priv)
+{
+       struct print_ctx *ctx = (struct print_ctx *) priv;
 
-                       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 (loc) {
+       case SIDE_TYPE_VISITOR_BEFORE:
+               if (get_nested_item_nr(ctx) != 0)
+                       printf(",");
+               printf(" %s: { ", side_ptr_get(item_desc->field_name));
+               break;
+       case SIDE_TYPE_VISITOR_AFTER:
+               printf(" }");
+               inc_nested_item_nr(ctx);
+               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:
-                               printf("%" PRIu32, v);
-                               break;
-                       case TRACER_DISPLAY_BASE_16:
-                               printf("0x%" PRIx32, v);
-                               break;
-                       default:
-                               abort();
-                       }
-                       break;
-               }
-               case 64:
-               {
-                       uint64_t v;
+static
+void tracer_print_elem(enum side_type_visitor_location loc, const struct side_type *type_desc __attribute__((unused)), void *priv)
+{
+       struct print_ctx *ctx = (struct print_ctx *) priv;
 
-                       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 (loc) {
+       case SIDE_TYPE_VISITOR_BEFORE:
+               if (get_nested_item_nr(ctx) != 0)
+                       printf(", { ");
+               else
+                       printf(" { ");
+               break;
+       case SIDE_TYPE_VISITOR_AFTER:
+               printf(" }");
+               inc_nested_item_nr(ctx);
                break;
        }
-       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;
+}
 
-                       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
+void tracer_print_null(const struct side_type *type_desc,
+               const struct side_arg *item __attribute__((unused)),
+               void *priv __attribute__((unused)))
+{
+       tracer_print_type_header(":", side_ptr_get(type_desc->u.side_null.attr),
+               type_desc->u.side_null.nr_attr);
+       printf("<NULL TYPE>");
+}
 
-                       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;
-
-                       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;
-
-                       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();
-               }
-               break;
-       }
-       default:
-               fprintf(stderr, "<UNKNOWN SCATTER-GATHER TYPE>");
-               abort();
-       }
-       printf(" }");
+static
+void tracer_print_bool(const struct side_type *type_desc,
+               const struct side_arg *item,
+               void *priv __attribute__((unused)))
+{
+       tracer_print_type_bool(":", &type_desc->u.side_bool, &item->u.side_static.bool_value, 0);
 }
 
 static
-void tracer_print_sg_field(const struct side_struct_field_sg *field_sg, void *ptr)
+void tracer_print_integer(const struct side_type *type_desc,
+               const struct side_arg *item,
+               void *priv __attribute__((unused)))
 {
-       printf("%s: ", field_sg->field_name);
-       tracer_print_sg_type(&field_sg->side_type, ptr);
+       tracer_print_type_integer(":", &type_desc->u.side_integer, &item->u.side_static.integer_value, 0, TRACER_DISPLAY_BASE_10);
 }
 
 static
-void tracer_print_struct_sg(const struct side_type_description *type_desc, void *ptr)
+void tracer_print_byte(const struct side_type *type_desc __attribute__((unused)),
+               const struct side_arg *item,
+               void *priv __attribute__((unused)))
 {
-       const struct side_type_struct_sg *struct_sg = type_desc->u.side_struct_sg;
-       int i;
+       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);
+}
 
-       print_attributes("attr", ":", struct_sg->attr, struct_sg->nr_attr);
-       printf("%s", struct_sg->nr_attr ? ", " : "");
-       printf("fields: { ");
-       for (i = 0; i < struct_sg->nr_fields; i++) {
-               printf("%s", i ? ", " : "");
-               tracer_print_sg_field(&struct_sg->fields_sg[i], ptr);
-       }
-       printf(" }");
+static
+void tracer_print_pointer(const struct side_type *type_desc,
+               const struct side_arg *item,
+               void *priv __attribute__((unused)))
+{
+       tracer_print_type_integer(":", &type_desc->u.side_integer, &item->u.side_static.integer_value, 0, TRACER_DISPLAY_BASE_16);
 }
 
 static
-void tracer_print_array(const struct side_type_description *type_desc, const struct side_arg_vec_description *sav_desc)
+void tracer_print_float(const struct side_type *type_desc,
+               const struct side_arg *item,
+               void *priv __attribute__((unused)))
 {
-       const struct side_arg_vec *sav = sav_desc->sav;
-       uint32_t side_sav_len = sav_desc->len;
-       int i;
+       tracer_print_type_float(":", &type_desc->u.side_float, &item->u.side_static.float_value);
+}
 
-       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 ? ", " : "");
-       printf("elements: ");
-       printf("[ ");
-       for (i = 0; i < side_sav_len; i++) {
-               printf("%s", i ? ", " : "");
-               tracer_print_type(type_desc->u.side_array.elem_type, &sav[i]);
-       }
-       printf(" ]");
+static
+void tracer_print_string(const struct side_type *type_desc,
+               const struct side_arg *item,
+               void *priv __attribute__((unused)))
+{
+       tracer_print_type_header(":", side_ptr_get(type_desc->u.side_string.attr), type_desc->u.side_string.nr_attr);
+       tracer_print_type_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);
 }
 
 static
-void tracer_print_vla(const struct side_type_description *type_desc, const struct side_arg_vec_description *sav_desc)
+void tracer_print_struct(enum side_type_visitor_location loc,
+       const struct side_type_struct *side_struct,
+       const struct side_arg_vec *side_arg_vec __attribute__((unused)), void *priv)
 {
-       const struct side_arg_vec *sav = sav_desc->sav;
-       uint32_t side_sav_len = sav_desc->len;
-       int i;
+       struct print_ctx *ctx = (struct print_ctx *) priv;
 
-       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: ");
-       printf("[ ");
-       for (i = 0; i < side_sav_len; i++) {
-               printf("%s", i ? ", " : "");
-               tracer_print_type(type_desc->u.side_vla.elem_type, &sav[i]);
+       switch (loc) {
+       case SIDE_TYPE_VISITOR_BEFORE:
+               print_attributes("attr", ":", side_ptr_get(side_struct->attr), side_struct->nr_attr);
+               printf("%s", side_struct->nr_attr ? ", " : "");
+               printf("fields: {");
+               push_nesting(ctx);
+               break;
+       case SIDE_TYPE_VISITOR_AFTER:
+               pop_nesting(ctx);
+               printf(" }");
+               break;
        }
-       printf(" ]");
 }
 
-struct tracer_visitor_priv {
-       const struct side_type_description *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)
+void tracer_print_array(enum side_type_visitor_location loc,
+       const struct side_type_array *side_array,
+       const struct side_arg_vec *side_arg_vec __attribute__((unused)), void *priv)
 {
-       struct tracer_visitor_priv *tracer_priv = tracer_ctx->priv;
+       struct print_ctx *ctx = (struct print_ctx *) priv;
 
-       printf("%s", tracer_priv->i++ ? ", " : "");
-       tracer_print_type(tracer_priv->elem_type, elem);
-       return SIDE_VISITOR_STATUS_OK;
+       switch (loc) {
+       case SIDE_TYPE_VISITOR_BEFORE:
+               print_attributes("attr", ":", side_ptr_get(side_array->attr), side_array->nr_attr);
+               printf("%s", side_array->nr_attr ? ", " : "");
+               printf("elements: [");
+               push_nesting(ctx);
+               break;
+       case SIDE_TYPE_VISITOR_AFTER:
+               pop_nesting(ctx);
+               printf(" ]");
+               break;
+       }
 }
 
 static
-void tracer_print_vla_visitor(const struct side_type_description *type_desc, void *app_ctx)
+void tracer_print_vla(enum side_type_visitor_location loc,
+       const struct side_type_vla *side_vla,
+       const struct side_arg_vec *side_arg_vec __attribute__((unused)), void *priv)
 {
-       enum side_visitor_status status;
-       struct tracer_visitor_priv tracer_priv = {
-               .elem_type = 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,
-       };
+       struct print_ctx *ctx = (struct print_ctx *) priv;
 
-       print_attributes("attr", ":", 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);
-       switch (status) {
-       case SIDE_VISITOR_STATUS_OK:
+       switch (loc) {
+       case SIDE_TYPE_VISITOR_BEFORE:
+               print_attributes("attr", ":", side_ptr_get(side_vla->attr), side_vla->nr_attr);
+               printf("%s", side_vla->nr_attr ? ", " : "");
+               printf("elements: [");
+               push_nesting(ctx);
+               break;
+       case SIDE_TYPE_VISITOR_AFTER:
+               pop_nesting(ctx);
+               printf(" ]");
                break;
-       case SIDE_VISITOR_STATUS_ERROR:
-               fprintf(stderr, "ERROR: Visitor error\n");
-               abort();
        }
-       printf(" ]");
 }
 
-void tracer_print_array_fixint(const struct side_type_description *type_desc, const struct side_arg_vec *item)
+static
+void tracer_print_vla_visitor(enum side_type_visitor_location loc,
+       const struct side_type_vla_visitor *side_vla_visitor,
+       const struct side_arg_vla_visitor *side_arg_vla_visitor __attribute__((unused)), void *priv)
 {
-       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;
+       struct print_ctx *ctx = (struct print_ctx *) priv;
 
-       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;
+       switch (loc) {
+       case SIDE_TYPE_VISITOR_BEFORE:
+               print_attributes("attr", ":", side_ptr_get(side_vla_visitor->attr), side_vla_visitor->nr_attr);
+               printf("%s", side_vla_visitor->nr_attr ? ", " : "");
+               printf("elements: [");
+               push_nesting(ctx);
                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;
+       case SIDE_TYPE_VISITOR_AFTER:
+               pop_nesting(ctx);
+               printf(" ]");
                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();
-               }
+static void tracer_print_enum(const struct side_type *type_desc,
+       const struct side_arg *item, void *priv)
+{
+       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;
 
-               printf("%s", i ? ", " : "");
-               tracer_print_type(elem_type, &sav_elem);
+       if (side_enum_get(elem_type->type) != side_enum_get(item->type)) {
+               fprintf(stderr, "ERROR: Unexpected enum element type\n");
+               abort();
        }
-       printf(" ]");
-       return;
-
-type_error:
-       fprintf(stderr, "ERROR: type mismatch\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 ? ", " : "");
+       printf("{ ");
+       tracer_print_integer(elem_type, item, priv);
+       printf(" }");
+       print_enum_labels(mappings, v);
 }
 
-void tracer_print_vla_fixint(const struct side_type_description *type_desc, const struct side_arg_vec *item)
+static void tracer_print_enum_bitmap(const struct side_type *type_desc,
+       const struct side_arg *item, void *priv __attribute__((unused)))
 {
-       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;
+       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;
 
-       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;
+       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:             /* 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_VLA_BYTE:
-               if (elem_type->type != SIDE_TYPE_BYTE)
-                       goto type_error;
+       case SIDE_TYPE_ARRAY:
+               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_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;
+       case SIDE_TYPE_VLA:
+               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:
-               goto type_error;
+               fprintf(stderr, "ERROR: Unexpected enum element type\n");
+               abort();
        }
-       side_type = elem_type->type;
+       stride_bit = elem_type_to_stride(elem_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;
+       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_ptr_get(side_enum_mappings->mappings)[i];
+               bool match = false;
+               uint64_t bit;
 
-               default:
-                       fprintf(stderr, "ERROR: Unexpected type\n");
+               if (mapping->range_end < mapping->range_begin) {
+                       fprintf(stderr, "ERROR: Unexpected enum bitmap range: %" PRIu64 "-%" PRIu64 "\n",
+                               mapping->range_begin, mapping->range_end);
                        abort();
                }
+               for (bit = mapping->range_begin; bit <= mapping->range_end; bit++) {
+                       if (bit > (nr_items * stride_bit) - 1)
+                               break;
+                       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;
+                               }
+                       } else {
+                               union int_value v = {};
 
-               printf("%s", i ? ", " : "");
-               tracer_print_type(elem_type, &sav_elem);
+                               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;
+                               }
+                       }
+               }
+match:
+               if (match) {
+                       printf("%s", print_count++ ? ", " : "");
+                       tracer_print_type_string(side_ptr_get(mapping->label.p), mapping->label.unit_size,
+                               side_enum_get(mapping->label.byte_order), NULL);
+               }
        }
+       if (!print_count)
+               printf("<NO LABEL>");
        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_gather_bool(const struct side_type_gather_bool *type,
+       const union side_bool_value *value,
+       void *priv __attribute__((unused)))
 {
-       const struct side_arg_dynamic_event_field *fields = dynamic_struct->fields;
-       uint32_t len = dynamic_struct->len;
-       int i;
-
-       print_attributes("attr", "::", 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);
-               tracer_print_dynamic(&fields[i].elem);
-       }
-       printf(" ]");
+       tracer_print_type_bool(":", &type->type, value, type->offset_bits);
 }
 
-struct tracer_dynamic_struct_visitor_priv {
-       int i;
-};
+static
+void tracer_print_gather_byte(const struct side_type_gather_byte *type,
+       const uint8_t *_ptr,
+       void *priv __attribute__((unused)))
+{
+       tracer_print_type_header(":", side_ptr_get(type->type.attr),
+                       type->type.nr_attr);
+       printf("0x%" PRIx8, *_ptr);
+}
 
 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)
+void tracer_print_gather_integer(const struct side_type_gather_integer *type,
+       const union side_integer_value *value,
+       void *priv __attribute__((unused)))
 {
-       struct tracer_dynamic_struct_visitor_priv *tracer_priv = tracer_ctx->priv;
+       tracer_print_type_integer(":", &type->type, value, type->offset_bits, TRACER_DISPLAY_BASE_10);
+}
 
-       printf("%s", tracer_priv->i++ ? ", " : "");
-       printf("%s:: ", dynamic_field->field_name);
-       tracer_print_dynamic(&dynamic_field->elem);
-       return SIDE_VISITOR_STATUS_OK;
+static
+void tracer_print_gather_pointer(const struct side_type_gather_integer *type,
+       const union side_integer_value *value,
+       void *priv __attribute__((unused)))
+{
+       tracer_print_type_integer(":", &type->type, value, type->offset_bits, TRACER_DISPLAY_BASE_16);
 }
 
 static
-void tracer_print_dynamic_struct_visitor(const struct side_arg_dynamic_vec *item)
+void tracer_print_gather_float(const struct side_type_gather_float *type,
+       const union side_float_value *value,
+       void *priv __attribute__((unused)))
 {
-       enum side_visitor_status status;
-       struct tracer_dynamic_struct_visitor_priv tracer_priv = {
-               .i = 0,
-       };
-       const struct side_tracer_dynamic_struct_visitor_ctx tracer_ctx = {
-               .write_field = tracer_dynamic_struct_write_elem_cb,
-               .priv = &tracer_priv,
-       };
-       void *app_ctx = item->u.side_dynamic_struct_visitor.app_ctx;
+       tracer_print_type_float(":", &type->type, value);
+}
 
-       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 ? ", " : "");
-       printf("fields:: ");
-       printf("[ ");
-       status = item->u.side_dynamic_struct_visitor.visitor(&tracer_ctx, app_ctx);
-       switch (status) {
-       case SIDE_VISITOR_STATUS_OK:
-               break;
-       case SIDE_VISITOR_STATUS_ERROR:
-               fprintf(stderr, "ERROR: Visitor error\n");
-               abort();
-       }
-       printf(" ]");
+static
+void tracer_print_gather_string(const struct side_type_gather_string *type,
+       const void *p, uint8_t unit_size,
+       enum side_type_label_byte_order byte_order,
+       size_t strlen_with_null __attribute__((unused)),
+       void *priv __attribute__((unused)))
+{
+       //TODO use strlen_with_null input
+       tracer_print_type_header(":", side_ptr_get(type->type.attr),
+                       type->type.nr_attr);
+       tracer_print_type_string(p, unit_size, byte_order, NULL);
 }
 
 static
-void tracer_print_dynamic_vla(const struct side_arg_dynamic_vec_vla *vla)
+void tracer_print_gather_struct(enum side_type_visitor_location loc,
+       const struct side_type_struct *side_struct,
+       void *priv)
 {
-       const struct side_arg_dynamic_vec *sav = vla->sav;
-       uint32_t side_sav_len = vla->len;
-       int i;
+       tracer_print_struct(loc, side_struct, NULL, priv);
+}
 
-       print_attributes("attr", "::", vla->attr, vla->nr_attr);
-       printf("%s", vla->nr_attr ? ", " : "");
-       printf("elements:: ");
-       printf("[ ");
-       for (i = 0; i < side_sav_len; i++) {
-               printf("%s", i ? ", " : "");
-               tracer_print_dynamic(&sav[i]);
-       }
-       printf(" ]");
+static
+void tracer_print_gather_array(enum side_type_visitor_location loc,
+       const struct side_type_array *side_array,
+       void *priv)
+{
+       tracer_print_array(loc, side_array, NULL, priv);
 }
 
-struct tracer_dynamic_vla_visitor_priv {
-       int i;
-};
+static
+void tracer_print_gather_vla(enum side_type_visitor_location loc,
+       const struct side_type_vla *side_vla,
+       uint32_t length __attribute__((unused)),
+       void *priv)
+{
+       tracer_print_vla(loc, side_vla, NULL, 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)
+void tracer_print_gather_enum(const struct side_type_gather_enum *type,
+       const union side_integer_value *value,
+       void *priv __attribute__((unused)))
 {
-       struct tracer_dynamic_vla_visitor_priv *tracer_priv = tracer_ctx->priv;
+       const struct side_enum_mappings *mappings = side_ptr_get(type->mappings);
+       const struct side_type *enum_elem_type = side_ptr_get(type->elem_type);
+       const struct side_type_gather_integer *side_integer = &enum_elem_type->u.side_gather.u.side_integer;
+       union int_value v;
 
-       printf("%s", tracer_priv->i++ ? ", " : "");
-       tracer_print_dynamic(elem);
-       return SIDE_VISITOR_STATUS_OK;
+       v = tracer_load_integer_value(&side_integer->type, value, 0, NULL);
+       print_attributes("attr", ":", side_ptr_get(mappings->attr), mappings->nr_attr);
+       printf("%s", mappings->nr_attr ? ", " : "");
+       printf("{ ");
+       tracer_print_type_integer(":", &side_integer->type, value, 0, TRACER_DISPLAY_BASE_10);
+       printf(" }");
+       print_enum_labels(mappings, v);
 }
 
 static
-void tracer_print_dynamic_vla_visitor(const struct side_arg_dynamic_vec *item)
+void tracer_print_dynamic_field(enum side_type_visitor_location loc, const struct side_arg_dynamic_field *field, void *priv)
 {
-       enum side_visitor_status status;
-       struct tracer_dynamic_vla_visitor_priv tracer_priv = {
-               .i = 0,
-       };
-       const struct side_tracer_dynamic_vla_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;
+       struct print_ctx *ctx = (struct print_ctx *) priv;
 
-       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 ? ", " : "");
-       printf("elements:: ");
-       printf("[ ");
-       status = item->u.side_dynamic_vla_visitor.visitor(&tracer_ctx, app_ctx);
-       switch (status) {
-       case SIDE_VISITOR_STATUS_OK:
+       switch (loc) {
+       case SIDE_TYPE_VISITOR_BEFORE:
+               if (get_nested_item_nr(ctx) != 0)
+                       printf(",");
+               printf(" %s:: { ", side_ptr_get(field->field_name));
+               break;
+       case SIDE_TYPE_VISITOR_AFTER:
+               printf(" }");
+               inc_nested_item_nr(ctx);
                break;
-       case SIDE_VISITOR_STATUS_ERROR:
-               fprintf(stderr, "ERROR: Visitor error\n");
-               abort();
        }
-       printf(" ]");
 }
 
 static
-void tracer_print_dynamic_basic_type_header(const struct side_arg_dynamic_vec *item)
+void tracer_print_dynamic_elem(enum side_type_visitor_location loc,
+       const struct side_arg *dynamic_item __attribute__((unused)), void *priv)
 {
-       print_attributes("attr", "::", item->u.side_basic.attr, item->u.side_basic.nr_attr);
-       printf("%s", item->u.side_basic.nr_attr ? ", " : "");
-       printf("value:: ");
+       tracer_print_elem(loc, NULL, priv);
 }
 
 static
-void tracer_print_dynamic(const struct side_arg_dynamic_vec *item)
+void tracer_print_dynamic_null(const struct side_arg *item,
+               void *priv __attribute__((unused)))
 {
-       enum tracer_display_base base = TRACER_DISPLAY_BASE_10;
+       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>");
+}
 
-       switch (item->dynamic_type) {
-       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:
-               base = get_attr_display_base(item->u.side_basic.attr,
-                               item->u.side_basic.nr_attr);
-               break;
-       default:
-               break;
-       }
+static
+void tracer_print_dynamic_bool(const struct side_arg *item,
+               void *priv __attribute__((unused)))
+{
+       tracer_print_type_bool("::", &item->u.side_dynamic.side_bool.type, &item->u.side_dynamic.side_bool.value, 0);
+}
 
+static
+void tracer_print_dynamic_integer(const struct side_arg *item,
+               void *priv __attribute__((unused)))
+{
+       tracer_print_type_integer("::", &item->u.side_dynamic.side_integer.type, &item->u.side_dynamic.side_integer.value, 0,
+                       TRACER_DISPLAY_BASE_10);
+}
 
-       printf("{ ");
-       switch (item->dynamic_type) {
-       case SIDE_DYNAMIC_TYPE_NULL:
-               tracer_print_dynamic_basic_type_header(item);
-               printf("<NULL TYPE>");
-               break;
-       case SIDE_DYNAMIC_TYPE_BOOL:
-               tracer_print_dynamic_basic_type_header(item);
-               printf("%s", item->u.side_basic.u.side_bool ? "true" : "false");
-               break;
-       case SIDE_DYNAMIC_TYPE_U8:
-       {
-               uint8_t v;
+static
+void tracer_print_dynamic_byte(const struct side_arg *item,
+               void *priv __attribute__((unused)))
+{
+       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);
+}
 
-               v = item->u.side_basic.u.integer_value.side_u8;
-               tracer_print_dynamic_basic_type_header(item);
-               switch (base) {
-               case TRACER_DISPLAY_BASE_2:
-                       print_integer_binary(v, 8);
-                       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 SIDE_DYNAMIC_TYPE_U16:
-       {
-               uint16_t v;
-
-               v = item->u.side_basic.u.integer_value.side_u16;
-               if (dynamic_type_to_host_reverse_bo(item))
-                       v = side_bswap_16(v);
-               tracer_print_dynamic_basic_type_header(item);
-               switch (base) {
-               case TRACER_DISPLAY_BASE_2:
-                       print_integer_binary(v, 16);
-                       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 SIDE_DYNAMIC_TYPE_U32:
-       {
-               uint32_t v;
-
-               v = item->u.side_basic.u.integer_value.side_u32;
-               if (dynamic_type_to_host_reverse_bo(item))
-                       v = side_bswap_32(v);
-               tracer_print_dynamic_basic_type_header(item);
-               switch (base) {
-               case TRACER_DISPLAY_BASE_2:
-                       print_integer_binary(v, 32);
-                       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 SIDE_DYNAMIC_TYPE_U64:
-       {
-               uint64_t v;
-
-               v = item->u.side_basic.u.integer_value.side_u64;
-               if (dynamic_type_to_host_reverse_bo(item))
-                       v = side_bswap_64(v);
-               tracer_print_dynamic_basic_type_header(item);
-               switch (base) {
-               case TRACER_DISPLAY_BASE_2:
-                       print_integer_binary(v, 64);
-                       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;
-       }
-       case SIDE_DYNAMIC_TYPE_S8:
-       {
-               int8_t v;
+static
+void tracer_print_dynamic_pointer(const struct side_arg *item,
+               void *priv __attribute__((unused)))
+{
+       tracer_print_type_integer("::", &item->u.side_dynamic.side_integer.type, &item->u.side_dynamic.side_integer.value, 0,
+                       TRACER_DISPLAY_BASE_16);
+}
 
-               v = item->u.side_basic.u.integer_value.side_s8;
-               tracer_print_dynamic_basic_type_header(item);
-               switch (base) {
-               case TRACER_DISPLAY_BASE_2:
-                       print_integer_binary(v, 8);
-                       break;
-               case TRACER_DISPLAY_BASE_8:
-                       printf("0%" PRIo8, v);
-                       break;
-               case TRACER_DISPLAY_BASE_10:
-                       printf("%" PRId8, v);
-                       break;
-               case TRACER_DISPLAY_BASE_16:
-                       printf("0x%" PRIx8, v);
-                       break;
-               default:
-                       abort();
-               }
-               break;
-       }
-       case SIDE_DYNAMIC_TYPE_S16:
-       {
-               int16_t v;
-
-               v = item->u.side_basic.u.integer_value.side_u16;
-               if (dynamic_type_to_host_reverse_bo(item))
-                       v = side_bswap_16(v);
-               tracer_print_dynamic_basic_type_header(item);
-               switch (base) {
-               case TRACER_DISPLAY_BASE_2:
-                       print_integer_binary(v, 16);
-                       break;
-               case TRACER_DISPLAY_BASE_8:
-                       printf("0%" PRIo16, v);
-                       break;
-               case TRACER_DISPLAY_BASE_10:
-                       printf("%" PRId16, v);
-                       break;
-               case TRACER_DISPLAY_BASE_16:
-                       printf("0x%" PRIx16, v);
-                       break;
-               default:
-                       abort();
-               }
-               break;
-       }
-       case SIDE_DYNAMIC_TYPE_S32:
-       {
-               int32_t v;
-
-               v = item->u.side_basic.u.integer_value.side_u32;
-               if (dynamic_type_to_host_reverse_bo(item))
-                       v = side_bswap_32(v);
-               tracer_print_dynamic_basic_type_header(item);
-               switch (base) {
-               case TRACER_DISPLAY_BASE_2:
-                       print_integer_binary(v, 32);
-                       break;
-               case TRACER_DISPLAY_BASE_8:
-                       printf("0%" PRIo32, v);
-                       break;
-               case TRACER_DISPLAY_BASE_10:
-                       printf("%" PRId32, v);
-                       break;
-               case TRACER_DISPLAY_BASE_16:
-                       printf("0x%" PRIx32, v);
-                       break;
-               default:
-                       abort();
-               }
-               break;
-       }
-       case SIDE_DYNAMIC_TYPE_S64:
-       {
-               int64_t v;
-
-               v = item->u.side_basic.u.integer_value.side_u64;
-               if (dynamic_type_to_host_reverse_bo(item))
-                       v = side_bswap_64(v);
-               tracer_print_dynamic_basic_type_header(item);
-               switch (base) {
-               case TRACER_DISPLAY_BASE_2:
-                       print_integer_binary(v, 64);
-                       break;
-               case TRACER_DISPLAY_BASE_8:
-                       printf("0%" PRIo64, v);
-                       break;
-               case TRACER_DISPLAY_BASE_10:
-                       printf("%" PRId64, v);
-                       break;
-               case TRACER_DISPLAY_BASE_16:
-                       printf("0x%" PRIx64, v);
-                       break;
-               default:
-                       abort();
-               }
-               break;
-       }
-       case SIDE_DYNAMIC_TYPE_BYTE:
-               tracer_print_dynamic_basic_type_header(item);
-               printf("0x%" PRIx8, item->u.side_basic.u.side_byte);
-               break;
-       case SIDE_DYNAMIC_TYPE_POINTER32:
-       {
-               uint32_t v;
+static
+void tracer_print_dynamic_float(const struct side_arg *item,
+               void *priv __attribute__((unused)))
+{
+       tracer_print_type_float("::", &item->u.side_dynamic.side_float.type,
+                       &item->u.side_dynamic.side_float.value);
+}
 
-               v = item->u.side_basic.u.integer_value.side_u32;
-               if (dynamic_type_to_host_reverse_bo(item))
-                       v = side_bswap_32(v);
-               tracer_print_dynamic_basic_type_header(item);
-               printf("0x%" PRIx32, v);
-               break;
-       }
+static
+void tracer_print_dynamic_string(const struct side_arg *item,
+               void *priv __attribute__((unused)))
+{
+       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_type_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);
+}
 
-       case SIDE_DYNAMIC_TYPE_POINTER64:
-       {
-               uint64_t v;
+static
+void tracer_print_dynamic_struct(enum side_type_visitor_location loc,
+       const struct side_arg_dynamic_struct *dynamic_struct,
+       void *priv)
+{
+       struct print_ctx *ctx = (struct print_ctx *) priv;
 
-               v = item->u.side_basic.u.integer_value.side_u64;
-               if (dynamic_type_to_host_reverse_bo(item))
-                       v = side_bswap_64(v);
-               tracer_print_dynamic_basic_type_header(item);
-               printf("0x%" PRIx64, v);
+       switch (loc) {
+       case SIDE_TYPE_VISITOR_BEFORE:
+               print_attributes("attr", "::", side_ptr_get(dynamic_struct->attr), dynamic_struct->nr_attr);
+               printf("%s", dynamic_struct->nr_attr ? ", " : "");
+               printf("fields:: {");
+               push_nesting(ctx);
+               break;
+       case SIDE_TYPE_VISITOR_AFTER:
+               pop_nesting(ctx);
+               printf(" }");
                break;
        }
+}
 
-       case SIDE_DYNAMIC_TYPE_FLOAT_BINARY16:
-       {
-#if __HAVE_FLOAT16
-               union {
-                       _Float16 f;
-                       uint16_t u;
-               } float16 = {
-                       .f = item->u.side_basic.u.float_value.side_float_binary16,
-               };
+static
+void tracer_print_dynamic_struct_visitor(enum side_type_visitor_location loc,
+       const struct side_arg *item,
+       void *priv)
+{
+       struct side_arg_dynamic_struct_visitor *dynamic_struct_visitor;
+       struct print_ctx *ctx = (struct print_ctx *) priv;
 
-               if (dynamic_type_to_host_reverse_bo(item))
-                       float16.u = side_bswap_16(float16.u);
-               tracer_print_dynamic_basic_type_header(item);
-               printf("%g", (double) float16.f);
-               break;
-#else
-               fprintf(stderr, "ERROR: Unsupported binary16 float type\n");
+       dynamic_struct_visitor = side_ptr_get(item->u.side_dynamic.side_dynamic_struct_visitor);
+       if (!dynamic_struct_visitor)
                abort();
-#endif
-       }
-       case SIDE_DYNAMIC_TYPE_FLOAT_BINARY32:
-       {
-#if __HAVE_FLOAT32
-               union {
-                       _Float32 f;
-                       uint32_t u;
-               } float32 = {
-                       .f = item->u.side_basic.u.float_value.side_float_binary32,
-               };
 
-               if (dynamic_type_to_host_reverse_bo(item))
-                       float32.u = side_bswap_32(float32.u);
-               tracer_print_dynamic_basic_type_header(item);
-               printf("%g", (double) float32.f);
+       switch (loc) {
+       case SIDE_TYPE_VISITOR_BEFORE:
+               print_attributes("attr", "::", side_ptr_get(dynamic_struct_visitor->attr), dynamic_struct_visitor->nr_attr);
+               printf("%s", dynamic_struct_visitor->nr_attr ? ", " : "");
+               printf("fields:: {");
+               push_nesting(ctx);
                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_basic.u.float_value.side_float_binary64,
-               };
-
-               if (dynamic_type_to_host_reverse_bo(item))
-                       float64.u = side_bswap_64(float64.u);
-               tracer_print_dynamic_basic_type_header(item);
-               printf("%g", (double) float64.f);
+       case SIDE_TYPE_VISITOR_AFTER:
+               pop_nesting(ctx);
+               printf(" }");
                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_basic.u.float_value.side_float_binary128,
-               };
+}
 
-               if (dynamic_type_to_host_reverse_bo(item))
-                       side_bswap_128p(float128.arr);
-               tracer_print_dynamic_basic_type_header(item);
-               printf("%Lg", (long double) float128.f);
-               break;
-#else
-               fprintf(stderr, "ERROR: Unsupported binary128 float type\n");
-               abort();
-#endif
-       }
-       case SIDE_DYNAMIC_TYPE_STRING:
-               tracer_print_dynamic_basic_type_header(item);
-               printf("\"%s\"", (const char *)(uintptr_t) item->u.side_basic.u.string);
-               break;
-       case SIDE_DYNAMIC_TYPE_STRUCT:
-               tracer_print_dynamic_struct(item->u.side_dynamic_struct);
-               break;
-       case SIDE_DYNAMIC_TYPE_STRUCT_VISITOR:
-               tracer_print_dynamic_struct_visitor(item);
-               break;
-       case SIDE_DYNAMIC_TYPE_VLA:
-               tracer_print_dynamic_vla(item->u.side_dynamic_vla);
+static
+void tracer_print_dynamic_vla(enum side_type_visitor_location loc,
+       const struct side_arg_dynamic_vla *dynamic_vla,
+       void *priv)
+{
+       struct print_ctx *ctx = (struct print_ctx *) priv;
+
+       switch (loc) {
+       case SIDE_TYPE_VISITOR_BEFORE:
+               print_attributes("attr", "::", side_ptr_get(dynamic_vla->attr), dynamic_vla->nr_attr);
+               printf("%s", dynamic_vla->nr_attr ? ", " : "");
+               printf("elements:: [");
+               push_nesting(ctx);
                break;
-       case SIDE_DYNAMIC_TYPE_VLA_VISITOR:
-               tracer_print_dynamic_vla_visitor(item);
+       case SIDE_TYPE_VISITOR_AFTER:
+               pop_nesting(ctx);
+               printf(" ]");
                break;
-       default:
-               fprintf(stderr, "<UNKNOWN TYPE>");
-               abort();
        }
-       printf(" }");
 }
 
 static
-void tracer_print_static_fields(const struct side_event_description *desc,
-               const struct side_arg_vec_description *sav_desc,
-               int *nr_items)
+void tracer_print_dynamic_vla_visitor(enum side_type_visitor_location loc,
+       const struct side_arg *item,
+       void *priv)
 {
-       const struct side_arg_vec *sav = sav_desc->sav;
-       uint32_t side_sav_len = sav_desc->len;
-       int i;
+       struct side_arg_dynamic_vla_visitor *dynamic_vla_visitor;
+       struct print_ctx *ctx = (struct print_ctx *) priv;
 
-       printf("provider: %s, event: %s", desc->provider_name, desc->event_name);
-       if (desc->nr_fields != side_sav_len) {
-               fprintf(stderr, "ERROR: number of fields mismatch between description and arguments\n");
+       dynamic_vla_visitor = side_ptr_get(item->u.side_dynamic.side_dynamic_vla_visitor);
+       if (!dynamic_vla_visitor)
                abort();
-       }
-       print_attributes(", attr", ":", 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]);
-       }
-       if (nr_items)
-               *nr_items = i;
-       if (side_sav_len)
+
+       switch (loc) {
+       case SIDE_TYPE_VISITOR_BEFORE:
+               print_attributes("attr", "::", side_ptr_get(dynamic_vla_visitor->attr), dynamic_vla_visitor->nr_attr);
+               printf("%s", dynamic_vla_visitor->nr_attr ? ", " : "");
+               printf("elements:: [");
+               push_nesting(ctx);
+               break;
+       case SIDE_TYPE_VISITOR_AFTER:
+               pop_nesting(ctx);
                printf(" ]");
+               break;
+       }
 }
 
+static struct side_type_visitor type_visitor = {
+       .event_func = tracer_print_event,
+       .static_fields_func = tracer_print_static_fields,
+       .variadic_fields_func = tracer_print_variadic_fields,
+
+       /* Stack-copy basic types. */
+       .field_func = tracer_print_field,
+       .elem_func = tracer_print_elem,
+       .null_type_func = tracer_print_null,
+       .bool_type_func = tracer_print_bool,
+       .integer_type_func = tracer_print_integer,
+       .byte_type_func = tracer_print_byte,
+       .pointer_type_func = tracer_print_pointer,
+       .float_type_func = tracer_print_float,
+       .string_type_func = tracer_print_string,
+
+       /* Stack-copy compound types. */
+       .struct_type_func = tracer_print_struct,
+       .array_type_func = tracer_print_array,
+       .vla_type_func = tracer_print_vla,
+       .vla_visitor_type_func = tracer_print_vla_visitor,
+
+       /* Stack-copy enumeration types. */
+       .enum_type_func = tracer_print_enum,
+       .enum_bitmap_type_func = tracer_print_enum_bitmap,
+
+       /* Gather basic types. */
+       .gather_bool_type_func = tracer_print_gather_bool,
+       .gather_byte_type_func = tracer_print_gather_byte,
+       .gather_integer_type_func = tracer_print_gather_integer,
+       .gather_pointer_type_func = tracer_print_gather_pointer,
+       .gather_float_type_func = tracer_print_gather_float,
+       .gather_string_type_func = tracer_print_gather_string,
+
+       /* Gather compound types. */
+       .gather_struct_type_func = tracer_print_gather_struct,
+       .gather_array_type_func = tracer_print_gather_array,
+       .gather_vla_type_func = tracer_print_gather_vla,
+
+       /* Gather enumeration types. */
+       .gather_enum_type_func = tracer_print_gather_enum,
+
+       /* Dynamic basic types. */
+       .dynamic_field_func = tracer_print_dynamic_field,
+       .dynamic_elem_func = tracer_print_dynamic_elem,
+
+       .dynamic_null_func = tracer_print_dynamic_null,
+       .dynamic_bool_func = tracer_print_dynamic_bool,
+       .dynamic_integer_func = tracer_print_dynamic_integer,
+       .dynamic_byte_func = tracer_print_dynamic_byte,
+       .dynamic_pointer_func = tracer_print_dynamic_pointer,
+       .dynamic_float_func = tracer_print_dynamic_float,
+       .dynamic_string_func = tracer_print_dynamic_string,
+
+       /* Dynamic compound types. */
+       .dynamic_struct_func = tracer_print_dynamic_struct,
+       .dynamic_struct_visitor_func = tracer_print_dynamic_struct_visitor,
+       .dynamic_vla_func = tracer_print_dynamic_vla,
+       .dynamic_vla_visitor_func = tracer_print_dynamic_vla_visitor,
+};
+
+static
 void tracer_call(const struct side_event_description *desc,
-               const struct side_arg_vec_description *sav_desc,
-               void *priv __attribute__((unused)))
+               const struct side_arg_vec *side_arg_vec,
+               void *priv __attribute__((unused)),
+               void *caller_addr)
 {
-       int nr_fields = 0;
+       struct print_ctx ctx = {};
 
-       tracer_print_static_fields(desc, sav_desc, &nr_fields);
-       printf("\n");
+       type_visitor_event(&type_visitor, desc, side_arg_vec, NULL, caller_addr, &ctx);
 }
 
+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,
-               void *priv __attribute__((unused)))
+               const struct side_arg_vec *side_arg_vec,
+               const struct side_arg_dynamic_struct *var_struct,
+               void *priv __attribute__((unused)),
+               void *caller_addr)
 {
-       uint32_t var_struct_len = var_struct->len;
-       int nr_fields = 0, i;
-
-       tracer_print_static_fields(desc, sav_desc, &nr_fields);
+       struct print_ctx ctx = {};
 
-       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);
-       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);
-       }
-       if (i)
-               printf(" ]");
-       printf("\n");
+       type_visitor_event(&type_visitor, desc, side_arg_vec, var_struct, caller_addr, &ctx);
 }
 
+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;
@@ -2218,25 +1733,44 @@ 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);
+                               ret = side_tracer_callback_variadic_register(event, tracer_call_variadic, NULL, tracer_key);
                                if (ret)
                                        abort();
                        } else {
-                               ret = side_tracer_callback_register(event, tracer_call, NULL);
+                               ret = side_tracer_callback_register(event, tracer_call, NULL, tracer_key);
                                if (ret)
                                        abort();
                        }
                } else {
                        if (event->flags & SIDE_EVENT_FLAG_VARIADIC) {
-                               ret = side_tracer_callback_variadic_unregister(event, tracer_call_variadic, NULL);
+                               ret = side_tracer_callback_variadic_unregister(event, tracer_call_variadic, NULL, tracer_key);
                                if (ret)
                                        abort();
                        } else {
-                               ret = side_tracer_callback_unregister(event, tracer_call, NULL);
+                               ret = side_tracer_callback_unregister(event, tracer_call, NULL, tracer_key);
                                if (ret)
                                        abort();
                        }
@@ -2250,6 +1784,8 @@ void tracer_init(void);
 static
 void tracer_init(void)
 {
+       if (side_tracer_request_key(&tracer_key))
+               abort();
        tracer_handle = side_tracer_event_notification_register(tracer_event_notification, NULL);
        if (!tracer_handle)
                abort();
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