Database

- libmdbx inlined not to change the code of utilities
- libmdbx.mir removed from build scripts

3 files changed, 0 insertions, 1526 deletions

diff --git a/tools/mdbx_chk/src/mdbx_chk.cc b/tools/mdbx_chk/src/mdbx_chk.cc
deleted file mode 100644
index f2725bd37f..0000000000
--- a/tools/mdbx_chk/src/mdbx_chk.cc
+++ /dev/null
@@ -1,1476 +0,0 @@
-/* mdbx_chk.c - memory-mapped database check tool */
-
-/*
- * Copyright 2015-2020 Leonid Yuriev <leo@yuriev.ru>
- * and other libmdbx authors: please see AUTHORS file.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted only as authorized by the OpenLDAP
- * Public License.
- *
- * A copy of this license is available in the file LICENSE in the
- * top-level directory of the distribution or, alternatively, at
- * <http://www.OpenLDAP.org/license.html>. */
-
-#include "stdafx.h"
-
-#ifdef _MSC_VER
-#if _MSC_VER > 1800
-#pragma warning(disable : 4464) /* relative include path contains '..' */
-#endif
-#pragma warning(disable : 4996) /* The POSIX name is deprecated... */
-#endif                          /* _MSC_VER (warnings) */
-
-#define MDBX_TOOLS /* Avoid using internal mdbx_assert() */
-#include "../../libs/libmdbx/src/src/internals.h"
-
-typedef struct flagbit {
-  int bit;
-  const char *name;
-} flagbit;
-
-const flagbit dbflags[] = {{MDBX_DUPSORT, "dupsort"},
-                           {MDBX_INTEGERKEY, "integerkey"},
-                           {MDBX_REVERSEKEY, "reversekey"},
-                           {MDBX_DUPFIXED, "dupfixed"},
-                           {MDBX_REVERSEDUP, "reversedup"},
-                           {MDBX_INTEGERDUP, "integerdup"},
-                           {0, NULL}};
-
-#if defined(_WIN32) || defined(_WIN64)
-#include "../../libs/libmdbx/src/src/wingetopt.h"
-#include "../../libs/libmdbx/src/src/wingetopt.c"
-
-static volatile BOOL user_break;
-static BOOL WINAPI ConsoleBreakHandlerRoutine(DWORD dwCtrlType) {
-  (void)dwCtrlType;
-  user_break = 1;
-  return true;
-}
-
-#else /* WINDOWS */
-
-static volatile sig_atomic_t user_break;
-static void signal_handler(int sig) {
-  (void)sig;
-  user_break = 1;
-}
-
-#endif /* !WINDOWS */
-
-#define EXIT_INTERRUPTED (EXIT_FAILURE + 4)
-#define EXIT_FAILURE_SYS (EXIT_FAILURE + 3)
-#define EXIT_FAILURE_MDB (EXIT_FAILURE + 2)
-#define EXIT_FAILURE_CHECK_MAJOR (EXIT_FAILURE + 1)
-#define EXIT_FAILURE_CHECK_MINOR EXIT_FAILURE
-
-typedef struct {
-  const char *name;
-  struct {
-    uint64_t branch, large_count, large_volume, leaf;
-    uint64_t subleaf_dupsort, leaf_dupfixed, subleaf_dupfixed;
-    uint64_t total, empty, other;
-  } pages;
-  uint64_t payload_bytes;
-  uint64_t lost_bytes;
-} walk_dbi_t;
-
-struct {
-  short *pagemap;
-  uint64_t total_payload_bytes;
-  uint64_t pgcount;
-  walk_dbi_t dbi[MAX_DBI + CORE_DBS + /* account pseudo-entry for meta */ 1];
-} walk;
-
-#define dbi_free walk.dbi[FREE_DBI]
-#define dbi_main walk.dbi[MAIN_DBI]
-#define dbi_meta walk.dbi[CORE_DBS]
-
-int envflags = MDBX_RDONLY | MDBX_EXCLUSIVE;
-MDBX_env *env;
-MDBX_txn *txn;
-MDBX_envinfo envinfo;
-MDBX_stat envstat;
-size_t userdb_count, skipped_subdb;
-uint64_t total_unused_bytes, reclaimable_pages, gc_pages, alloc_pages,
-    unused_pages, backed_pages;
-unsigned verbose;
-bool ignore_wrong_order, quiet, dont_traversal;
-const char *only_subdb;
-
-struct problem {
-  struct problem *pr_next;
-  size_t count;
-  const char *caption;
-};
-
-struct problem *problems_list;
-uint64_t total_problems;
-
-static void __printf_args(1, 2) print(const char *msg, ...) {
-  if (!quiet) {
-    va_list args;
-
-    fflush(stderr);
-    va_start(args, msg);
-    vfprintf(stdout, msg, args);
-    va_end(args);
-  }
-}
-
-static void __printf_args(1, 2) error(const char *msg, ...) {
-  total_problems++;
-
-  if (!quiet) {
-    va_list args;
-
-    fflush(NULL);
-    va_start(args, msg);
-    fputs(" ! ", stderr);
-    vfprintf(stderr, msg, args);
-    va_end(args);
-    fflush(NULL);
-  }
-}
-
-static int check_user_break(void) {
-  switch (user_break) {
-  case 0:
-    return MDBX_SUCCESS;
-  case 1:
-    print(" - interrupted by signal\n");
-    fflush(NULL);
-    user_break = 2;
-  }
-  return MDBX_EINTR;
-}
-
-static void pagemap_cleanup(void) {
-  for (size_t i = CORE_DBS + /* account pseudo-entry for meta */ 1;
-       i < ARRAY_LENGTH(walk.dbi); ++i) {
-    if (walk.dbi[i].name) {
-      mdbx_free((void *)walk.dbi[i].name);
-      walk.dbi[i].name = NULL;
-    }
-  }
-
-  mdbx_free(walk.pagemap);
-  walk.pagemap = NULL;
-}
-
-static walk_dbi_t *pagemap_lookup_dbi(const char *dbi_name, bool silent) {
-  static walk_dbi_t *last;
-
-  if (dbi_name == MDBX_PGWALK_MAIN)
-    return &dbi_main;
-  if (dbi_name == MDBX_PGWALK_GC)
-    return &dbi_free;
-  if (dbi_name == MDBX_PGWALK_META)
-    return &dbi_meta;
-
-  if (last && strcmp(last->name, dbi_name) == 0)
-    return last;
-
-  walk_dbi_t *dbi = walk.dbi + CORE_DBS + /* account pseudo-entry for meta */ 1;
-  for (; dbi < ARRAY_END(walk.dbi) && dbi->name; ++dbi) {
-    if (strcmp(dbi->name, dbi_name) == 0)
-      return last = dbi;
-  }
-
-  if (verbose > 0 && !silent) {
-    print(" - found '%s' area\n", dbi_name);
-    fflush(NULL);
-  }
-
-  if (dbi == ARRAY_END(walk.dbi))
-    return NULL;
-
-  dbi->name = mdbx_strdup(dbi_name);
-  return last = dbi;
-}
-
-static void __printf_args(4, 5)
-
-    problem_add(const char *object, uint64_t entry_number, const char *msg,
-                const char *extra, ...) {
-  total_problems++;
-
-  if (!quiet) {
-    int need_fflush = 0;
-    struct problem *p;
-
-    for (p = problems_list; p; p = p->pr_next)
-      if (p->caption == msg)
-        break;
-
-    if (!p) {
-      p = (problem *)mdbx_calloc(1, sizeof(*p));
-      p->caption = msg;
-      p->pr_next = problems_list;
-      problems_list = p;
-      need_fflush = 1;
-    }
-
-    p->count++;
-    if (verbose > 1) {
-      print("     %s #%" PRIu64 ": %s", object, entry_number, msg);
-      if (extra) {
-        va_list args;
-        printf(" (");
-        va_start(args, extra);
-        vfprintf(stdout, extra, args);
-        va_end(args);
-        printf(")");
-      }
-      printf("\n");
-      if (need_fflush)
-        fflush(NULL);
-    }
-  }
-}
-
-static struct problem *problems_push(void) {
-  struct problem *p = problems_list;
-  problems_list = NULL;
-  return p;
-}
-
-static size_t problems_pop(struct problem *list) {
-  size_t count = 0;
-
-  if (problems_list) {
-    int i;
-
-    print(" - problems: ");
-    for (i = 0; problems_list; ++i) {
-      struct problem *p = problems_list->pr_next;
-      count += problems_list->count;
-      print("%s%s (%" PRIuPTR ")", i ? ", " : "", problems_list->caption,
-            problems_list->count);
-      mdbx_free(problems_list);
-      problems_list = p;
-    }
-    print("\n");
-    fflush(NULL);
-  }
-
-  problems_list = list;
-  return count;
-}
-
-static int pgvisitor(const uint64_t pgno, const unsigned pgnumber,
-                     void *const ctx, const int deep,
-                     const char *const dbi_name_or_tag, const size_t page_size,
-                     const MDBX_page_type_t pagetype, const size_t nentries,
-                     const size_t payload_bytes, const size_t header_bytes,
-                     const size_t unused_bytes) {
-  (void)ctx;
-  if (deep > 42) {
-    problem_add("deep", deep, "too large", nullptr);
-    return MDBX_CORRUPTED /* avoid infinite loop/recursion */;
-  }
-
-  if (pagetype == MDBX_page_void)
-    return MDBX_SUCCESS;
-
-  walk_dbi_t *dbi = pagemap_lookup_dbi(dbi_name_or_tag, false);
-  if (!dbi)
-    return MDBX_ENOMEM;
-
-  const size_t page_bytes = payload_bytes + header_bytes + unused_bytes;
-  walk.pgcount += pgnumber;
-
-  const char *pagetype_caption;
-  bool branch = false;
-  switch (pagetype) {
-  default:
-    problem_add("page", pgno, "unknown page-type", "type %u, deep %i",
-                (unsigned)pagetype, deep);
-    pagetype_caption = "unknown";
-    dbi->pages.other += pgnumber;
-    break;
-  case MDBX_page_meta:
-    pagetype_caption = "meta";
-    dbi->pages.other += pgnumber;
-    break;
-  case MDBX_page_large:
-    pagetype_caption = "large";
-    dbi->pages.large_volume += pgnumber;
-    dbi->pages.large_count += 1;
-    break;
-  case MDBX_page_branch:
-    pagetype_caption = "branch";
-    dbi->pages.branch += pgnumber;
-    branch = true;
-    break;
-  case MDBX_page_leaf:
-    pagetype_caption = "leaf";
-    dbi->pages.leaf += pgnumber;
-    break;
-  case MDBX_page_dupfixed_leaf:
-    pagetype_caption = "leaf-dupfixed";
-    dbi->pages.leaf_dupfixed += pgnumber;
-    break;
-  case MDBX_subpage_leaf:
-    pagetype_caption = "subleaf-dupsort";
-    dbi->pages.subleaf_dupsort += 1;
-    break;
-  case MDBX_subpage_dupfixed_leaf:
-    pagetype_caption = "subleaf-dupfixed";
-    dbi->pages.subleaf_dupfixed += 1;
-    break;
-  }
-
-  if (pgnumber) {
-    if (verbose > 3 && (!only_subdb || strcmp(only_subdb, dbi->name) == 0)) {
-      if (pgnumber == 1)
-        print("     %s-page %" PRIu64, pagetype_caption, pgno);
-      else
-        print("     %s-span %" PRIu64 "[%u]", pagetype_caption, pgno, pgnumber);
-      print(" of %s: header %" PRIiPTR ", payload %" PRIiPTR
-            ", unused %" PRIiPTR ", deep %i\n",
-            dbi->name, header_bytes, payload_bytes, unused_bytes, deep);
-    }
-
-    bool already_used = false;
-    for (unsigned n = 0; n < pgnumber; ++n) {
-      uint64_t spanpgno = pgno + n;
-      if (spanpgno >= alloc_pages)
-        problem_add("page", spanpgno, "wrong page-no",
-                    "%s-page: %" PRIu64 " > %" PRIu64 ", deep %i",
-                    pagetype_caption, spanpgno, alloc_pages, deep);
-      else if (walk.pagemap[spanpgno]) {
-        walk_dbi_t *coll_dbi = &walk.dbi[walk.pagemap[spanpgno] - 1];
-        problem_add("page", spanpgno,
-                    (branch && coll_dbi == dbi) ? "loop" : "already used",
-                    "%s-page: by %s, deep %i", pagetype_caption, coll_dbi->name,
-                    deep);
-        already_used = true;
-      } else {
-        walk.pagemap[spanpgno] = (short)(dbi - walk.dbi + 1);
-        dbi->pages.total += 1;
-      }
-    }
-
-    if (already_used)
-      return branch ? MDBX_RESULT_TRUE /* avoid infinite loop/recursion */
-                    : MDBX_SUCCESS;
-  }
-
-  if (unused_bytes > page_size)
-    problem_add("page", pgno, "illegal unused-bytes",
-                "%s-page: %u < %" PRIuPTR " < %u", pagetype_caption, 0,
-                unused_bytes, envstat.ms_psize);
-
-  if (header_bytes < (int)sizeof(long) ||
-      (size_t)header_bytes >= envstat.ms_psize - sizeof(long))
-    problem_add("page", pgno, "illegal header-length",
-                "%s-page: %" PRIuPTR " < %" PRIuPTR " < %" PRIuPTR,
-                pagetype_caption, sizeof(long), header_bytes,
-                envstat.ms_psize - sizeof(long));
-  if (payload_bytes < 1) {
-    if (nentries > 1) {
-      problem_add("page", pgno, "zero size-of-entry",
-                  "%s-page: payload %" PRIuPTR " bytes, %" PRIuPTR " entries",
-                  pagetype_caption, payload_bytes, nentries);
-      /* if ((size_t)header_bytes + unused_bytes < page_size) {
-        // LY: hush a misuse error
-        page_bytes = page_size;
-      } */
-    } else {
-      problem_add("page", pgno, "empty",
-                  "%s-page: payload %" PRIuPTR " bytes, %" PRIuPTR
-                  " entries, deep %i",
-                  pagetype_caption, payload_bytes, nentries, deep);
-      dbi->pages.empty += 1;
-    }
-  }
-
-  if (pgnumber) {
-    if (page_bytes != page_size) {
-      problem_add("page", pgno, "misused",
-                  "%s-page: %" PRIuPTR " != %" PRIuPTR " (%" PRIuPTR
-                  "h + %" PRIuPTR "p + %" PRIuPTR "u), deep %i",
-                  pagetype_caption, page_size, page_bytes, header_bytes,
-                  payload_bytes, unused_bytes, deep);
-      if (page_size > page_bytes)
-        dbi->lost_bytes += page_size - page_bytes;
-    } else {
-      dbi->payload_bytes += payload_bytes + header_bytes;
-      walk.total_payload_bytes += payload_bytes + header_bytes;
-    }
-  }
-
-  return check_user_break();
-}
-
-typedef int(visitor)(const uint64_t record_number, const MDBX_val *key,
-                     const MDBX_val *data);
-static int process_db(MDBX_dbi dbi_handle, char *dbi_name, visitor *handler,
-                      bool silent);
-
-static int handle_userdb(const uint64_t record_number, const MDBX_val *key,
-                         const MDBX_val *data) {
-  (void)record_number;
-  (void)key;
-  (void)data;
-  return check_user_break();
-}
-
-static int handle_freedb(const uint64_t record_number, const MDBX_val *key,
-                         const MDBX_val *data) {
-  char *bad = "";
-  pgno_t *iptr = (pgno_t *)data->iov_base;
-
-  if (key->iov_len != sizeof(txnid_t))
-    problem_add("entry", record_number, "wrong txn-id size",
-                "key-size %" PRIiPTR, key->iov_len);
-  else {
-    txnid_t txnid;
-    memcpy(&txnid, key->iov_base, sizeof(txnid));
-    if (txnid < 1 || txnid > envinfo.mi_recent_txnid)
-      problem_add("entry", record_number, "wrong txn-id", "%" PRIaTXN, txnid);
-    else {
-      if (data->iov_len < sizeof(pgno_t) || data->iov_len % sizeof(pgno_t))
-        problem_add("entry", txnid, "wrong idl size", "%" PRIuPTR,
-                    data->iov_len);
-      size_t number = (data->iov_len >= sizeof(pgno_t)) ? *iptr++ : 0;
-      if (number < 1 || number > MDBX_PNL_MAX)
-        problem_add("entry", txnid, "wrong idl length", "%" PRIuPTR, number);
-      else if ((number + 1) * sizeof(pgno_t) > data->iov_len) {
-        problem_add("entry", txnid, "trimmed idl",
-                    "%" PRIuSIZE " > %" PRIuSIZE " (corruption)",
-                    (number + 1) * sizeof(pgno_t), data->iov_len);
-        number = data->iov_len / sizeof(pgno_t) - 1;
-      } else if (data->iov_len - (number + 1) * sizeof(pgno_t) >=
-                 /* LY: allow gap upto one page. it is ok
-                  * and better than shink-and-retry inside mdbx_update_gc() */
-                 envstat.ms_psize)
-        problem_add("entry", txnid, "extra idl space",
-                    "%" PRIuSIZE " < %" PRIuSIZE " (minor, not a trouble)",
-                    (number + 1) * sizeof(pgno_t), data->iov_len);
-
-      gc_pages += number;
-      if (envinfo.mi_latter_reader_txnid > txnid)
-        reclaimable_pages += number;
-
-      pgno_t prev = MDBX_PNL_ASCENDING ? NUM_METAS - 1 : txn->mt_next_pgno;
-      pgno_t span = 1;
-      for (unsigned i = 0; i < number; ++i) {
-        if (check_user_break())
-          return MDBX_EINTR;
-        const pgno_t pgno = iptr[i];
-        if (pgno < NUM_METAS)
-          problem_add("entry", txnid, "wrong idl entry",
-                      "pgno %" PRIaPGNO " < meta-pages %u", pgno, NUM_METAS);
-        else if (pgno >= backed_pages)
-          problem_add("entry", txnid, "wrong idl entry",
-                      "pgno %" PRIaPGNO " > backed-pages %" PRIu64, pgno,
-                      backed_pages);
-        else if (pgno >= alloc_pages)
-          problem_add("entry", txnid, "wrong idl entry",
-                      "pgno %" PRIaPGNO " > alloc-pages %" PRIu64, pgno,
-                      alloc_pages - 1);
-        else {
-          if (MDBX_PNL_DISORDERED(prev, pgno)) {
-            bad = " [bad sequence]";
-            problem_add("entry", txnid, "bad sequence",
-                        "%" PRIaPGNO " %c [%u].%" PRIaPGNO, prev,
-                        (prev == pgno) ? '=' : (MDBX_PNL_ASCENDING ? '>' : '<'),
-                        i, pgno);
-          }
-          if (walk.pagemap) {
-            int idx = walk.pagemap[pgno];
-            if (idx == 0)
-              walk.pagemap[pgno] = -1;
-            else if (idx > 0)
-              problem_add("page", pgno, "already used", "by %s",
-                          walk.dbi[idx - 1].name);
-            else
-              problem_add("page", pgno, "already listed in GC", nullptr);
-          }
-        }
-        prev = pgno;
-        while (i + span < number &&
-               iptr[i + span] == (MDBX_PNL_ASCENDING ? pgno_add(pgno, span)
-                                                     : pgno_sub(pgno, span)))
-          ++span;
-      }
-      if (verbose > 3 && !only_subdb) {
-        print("     transaction %" PRIaTXN ", %" PRIuPTR
-              " pages, maxspan %" PRIaPGNO "%s\n",
-              txnid, number, span, bad);
-        if (verbose > 4) {
-          for (unsigned i = 0; i < number; i += span) {
-            const pgno_t pgno = iptr[i];
-            for (span = 1;
-                 i + span < number &&
-                 iptr[i + span] == (MDBX_PNL_ASCENDING ? pgno_add(pgno, span)
-                                                       : pgno_sub(pgno, span));
-                 ++span)
-              ;
-            if (span > 1) {
-              print("    %9" PRIaPGNO "[%" PRIaPGNO "]\n", pgno, span);
-            } else
-              print("    %9" PRIaPGNO "\n", pgno);
-          }
-        }
-      }
-    }
-  }
-
-  return check_user_break();
-}
-
-static int handle_maindb(const uint64_t record_number, const MDBX_val *key,
-                         const MDBX_val *data) {
-  char *name;
-  int rc;
-  size_t i;
-
-  name = (char*)key->iov_base;
-  for (i = 0; i < key->iov_len; ++i) {
-    if (name[i] < ' ')
-      return handle_userdb(record_number, key, data);
-  }
-
-  name = (char *)mdbx_malloc(key->iov_len + 1);
-  memcpy(name, key->iov_base, key->iov_len);
-  name[key->iov_len] = '\0';
-  userdb_count++;
-
-  rc = process_db(~0u, name, handle_userdb, false);
-  mdbx_free(name);
-  if (rc != MDBX_INCOMPATIBLE)
-    return rc;
-
-  return handle_userdb(record_number, key, data);
-}
-
-static int process_db(MDBX_dbi dbi_handle, char *dbi_name, visitor *handler,
-                      bool silent) {
-  MDBX_cursor *mc;
-  MDBX_stat ms;
-  MDBX_val key, data;
-  MDBX_val prev_key, prev_data;
-  unsigned flags;
-  int rc, i;
-  struct problem *saved_list;
-  uint64_t problems_count;
-
-  uint64_t record_count = 0, dups = 0;
-  uint64_t key_bytes = 0, data_bytes = 0;
-
-  if ((MDBX_TXN_FINISHED | MDBX_TXN_ERROR) & mdbx_txn_flags(txn)) {
-    print(" ! abort processing '%s' due to a previous error\n",
-          dbi_name ? dbi_name : "@MAIN");
-    return MDBX_BAD_TXN;
-  }
-
-  if (dbi_handle == ~0u) {
-    rc = mdbx_dbi_open(txn, dbi_name, 0, &dbi_handle);
-    if (rc) {
-      if (!dbi_name ||
-          rc !=
-              MDBX_INCOMPATIBLE) /* LY: mainDB's record is not a user's DB. */ {
-        error("mdbx_open '%s' failed, error %d %s\n",
-              dbi_name ? dbi_name : "main", rc, mdbx_strerror(rc));
-      }
-      return rc;
-    }
-  }
-
-  if (dbi_handle >= CORE_DBS && dbi_name && only_subdb &&
-      strcmp(only_subdb, dbi_name) != 0) {
-    if (verbose) {
-      print("Skip processing '%s'...\n", dbi_name);
-      fflush(NULL);
-    }
-    skipped_subdb++;
-    return MDBX_SUCCESS;
-  }
-
-  if (!silent && verbose) {
-    print("Processing '%s'...\n", dbi_name ? dbi_name : "@MAIN");
-    fflush(NULL);
-  }
-
-  rc = mdbx_dbi_flags(txn, dbi_handle, &flags);
-  if (rc) {
-    error("mdbx_dbi_flags failed, error %d %s\n", rc, mdbx_strerror(rc));
-    return rc;
-  }
-
-  rc = mdbx_dbi_stat(txn, dbi_handle, &ms, sizeof(ms));
-  if (rc) {
-    error("mdbx_dbi_stat failed, error %d %s\n", rc, mdbx_strerror(rc));
-    return rc;
-  }
-
-  if (!silent && verbose) {
-    print(" - dbi-id %d, flags:", dbi_handle);
-    if (!flags)
-      print(" none");
-    else {
-      for (i = 0; dbflags[i].bit; i++)
-        if (flags & dbflags[i].bit)
-          print(" %s", dbflags[i].name);
-    }
-    print(" (0x%02X)\n", flags);
-    if (verbose > 1) {
-      print(" - page size %u, entries %" PRIu64 "\n", ms.ms_psize,
-            ms.ms_entries);
-      print(" - b-tree depth %u, pages: branch %" PRIu64 ", leaf %" PRIu64
-            ", overflow %" PRIu64 "\n",
-            ms.ms_depth, ms.ms_branch_pages, ms.ms_leaf_pages,
-            ms.ms_overflow_pages);
-    }
-  }
-
-  walk_dbi_t *dbi = (dbi_handle < CORE_DBS)
-                        ? &walk.dbi[dbi_handle]
-                        : pagemap_lookup_dbi(dbi_name, true);
-  if (!dbi) {
-    error("too many DBIs or out of memory\n");
-    return MDBX_ENOMEM;
-  }
-  if (!dont_traversal) {
-    const uint64_t subtotal_pages =
-        ms.ms_branch_pages + ms.ms_leaf_pages + ms.ms_overflow_pages;
-    if (subtotal_pages != dbi->pages.total)
-      error("%s pages mismatch (%" PRIu64 " != walked %" PRIu64 ")\n",
-            "subtotal", subtotal_pages, dbi->pages.total);
-    if (ms.ms_branch_pages != dbi->pages.branch)
-      error("%s pages mismatch (%" PRIu64 " != walked %" PRIu64 ")\n", "branch",
-            ms.ms_branch_pages, dbi->pages.branch);
-    const uint64_t allleaf_pages = dbi->pages.leaf + dbi->pages.leaf_dupfixed;
-    if (ms.ms_leaf_pages != allleaf_pages)
-      error("%s pages mismatch (%" PRIu64 " != walked %" PRIu64 ")\n",
-            "all-leaf", ms.ms_leaf_pages, allleaf_pages);
-    if (ms.ms_overflow_pages != dbi->pages.large_volume)
-      error("%s pages mismatch (%" PRIu64 " != walked %" PRIu64 ")\n",
-            "large/overlow", ms.ms_overflow_pages, dbi->pages.large_volume);
-  }
-  rc = mdbx_cursor_open(txn, dbi_handle, &mc);
-  if (rc) {
-    error("mdbx_cursor_open failed, error %d %s\n", rc, mdbx_strerror(rc));
-    return rc;
-  }
-
-  const size_t maxkeysize = mdbx_env_get_maxkeysize_ex(env, flags);
-
-  saved_list = problems_push();
-  prev_key.iov_base = NULL;
-  prev_key.iov_len = 0;
-  prev_data.iov_base = NULL;
-  prev_data.iov_len = 0;
-  rc = mdbx_cursor_get(mc, &key, &data, MDBX_FIRST);
-  while (rc == MDBX_SUCCESS) {
-    rc = check_user_break();
-    if (rc)
-      goto bailout;
-
-    bool bad_key = false;
-    if (key.iov_len > maxkeysize) {
-      problem_add("entry", record_count, "key length exceeds max-key-size",
-                  "%" PRIuPTR " > %" PRIuPTR, key.iov_len, maxkeysize);
-      bad_key = true;
-    } else if ((flags & MDBX_INTEGERKEY) && key.iov_len != sizeof(uint64_t) &&
-               key.iov_len != sizeof(uint32_t)) {
-      problem_add("entry", record_count, "wrong key length",
-                  "%" PRIuPTR " != 4or8", key.iov_len);
-      bad_key = true;
-    }
-
-    bool bad_data = false;
-    if ((flags & MDBX_INTEGERDUP) && data.iov_len != sizeof(uint64_t) &&
-        data.iov_len != sizeof(uint32_t)) {
-      problem_add("entry", record_count, "wrong data length",
-                  "%" PRIuPTR " != 4or8", data.iov_len);
-      bad_data = true;
-    }
-
-    if (prev_key.iov_base && !bad_data) {
-      if ((flags & MDBX_DUPFIXED) && prev_data.iov_len != data.iov_len) {
-        problem_add("entry", record_count, "different data length",
-                    "%" PRIuPTR " != %" PRIuPTR, prev_data.iov_len,
-                    data.iov_len);
-        bad_data = true;
-      }
-
-      if (!bad_key) {
-        int cmp = mdbx_cmp(txn, dbi_handle, &prev_key, &key);
-        if (cmp == 0) {
-          ++dups;
-          if ((flags & MDBX_DUPSORT) == 0) {
-            problem_add("entry", record_count, "duplicated entries", NULL);
-            if (data.iov_len == prev_data.iov_len &&
-                memcmp(data.iov_base, prev_data.iov_base, data.iov_len) == 0) {
-              problem_add("entry", record_count, "complete duplicate", NULL);
-            }
-          } else if (!bad_data) {
-            cmp = mdbx_dcmp(txn, dbi_handle, &prev_data, &data);
-            if (cmp == 0) {
-              problem_add("entry", record_count, "complete duplicate", NULL);
-            } else if (cmp > 0 && !ignore_wrong_order) {
-              problem_add("entry", record_count, "wrong order of multi-values",
-                          NULL);
-            }
-          }
-        } else if (cmp > 0 && !ignore_wrong_order) {
-          problem_add("entry", record_count, "wrong order of entries", NULL);
-        }
-      }
-    } else if (verbose) {
-      if (flags & MDBX_INTEGERKEY)
-        print(" - fixed key-size %" PRIuPTR "\n", key.iov_len);
-      if (flags & (MDBX_INTEGERDUP | MDBX_DUPFIXED))
-        print(" - fixed data-size %" PRIuPTR "\n", data.iov_len);
-    }
-
-    if (handler) {
-      rc = handler(record_count, &key, &data);
-      if (MDBX_IS_ERROR(rc))
-        goto bailout;
-    }
-
-    record_count++;
-    key_bytes += key.iov_len;
-    data_bytes += data.iov_len;
-
-    if (!bad_key)
-      prev_key = key;
-    if (!bad_data)
-      prev_data = data;
-    rc = mdbx_cursor_get(mc, &key, &data, MDBX_NEXT);
-  }
-  if (rc != MDBX_NOTFOUND)
-    error("mdbx_cursor_get failed, error %d %s\n", rc, mdbx_strerror(rc));
-  else
-    rc = 0;
-
-  if (record_count != ms.ms_entries)
-    problem_add("entry", record_count, "differentent number of entries",
-                "%" PRIu64 " != %" PRIu64, record_count, ms.ms_entries);
-bailout:
-  problems_count = problems_pop(saved_list);
-  if (!silent && verbose) {
-    print(" - summary: %" PRIu64 " records, %" PRIu64 " dups, %" PRIu64
-          " key's bytes, %" PRIu64 " data's "
-          "bytes, %" PRIu64 " problems\n",
-          record_count, dups, key_bytes, data_bytes, problems_count);
-    fflush(NULL);
-  }
-
-  mdbx_cursor_close(mc);
-  return (rc || problems_count) ? MDBX_RESULT_TRUE : MDBX_SUCCESS;
-}
-
-static void usage(char *prog) {
-  fprintf(
-      stderr,
-      "usage: %s [-V] [-v] [-n] [-q] [-c] [-w] [-d] [-i] [-s subdb] dbpath\n"
-      "  -V\t\tprint version and exit\n"
-      "  -v\t\tmore verbose, could be used multiple times\n"
-      "  -n\t\tNOSUBDIR mode for open\n"
-      "  -q\t\tbe quiet\n"
-      "  -c\t\tforce cooperative mode (don't try exclusive)\n"
-      "  -w\t\tlock DB for writing while checking\n"
-      "  -d\t\tdisable page-by-page traversal of B-tree\n"
-      "  -i\t\tignore wrong order errors (for custom comparators case)\n"
-      "  -s subdb\tprocess a specific subdatabase only\n",
-      prog);
-  exit(EXIT_INTERRUPTED);
-}
-
-const char *meta_synctype(uint64_t sign) {
-  switch (sign) {
-  case MDBX_DATASIGN_NONE:
-    return "no-sync/legacy";
-  case MDBX_DATASIGN_WEAK:
-    return "weak";
-  default:
-    return "steady";
-  }
-}
-
-static __inline bool meta_ot(txnid_t txn_a, uint64_t sign_a, txnid_t txn_b,
-                             uint64_t sign_b, const bool roolback2steady) {
-  if (txn_a == txn_b)
-    return SIGN_IS_STEADY(sign_b);
-
-  if (roolback2steady && SIGN_IS_STEADY(sign_a) != SIGN_IS_STEADY(sign_b))
-    return SIGN_IS_STEADY(sign_b);
-
-  return txn_a < txn_b;
-}
-
-static __inline bool meta_eq(txnid_t txn_a, uint64_t sign_a, txnid_t txn_b,
-                             uint64_t sign_b) {
-  if (txn_a != txn_b)
-    return false;
-
-  if (SIGN_IS_STEADY(sign_a) != SIGN_IS_STEADY(sign_b))
-    return false;
-
-  return true;
-}
-
-static __inline int meta_recent(const bool roolback2steady) {
-
-  if (meta_ot(envinfo.mi_meta0_txnid, envinfo.mi_meta0_sign,
-              envinfo.mi_meta1_txnid, envinfo.mi_meta1_sign, roolback2steady))
-    return meta_ot(envinfo.mi_meta2_txnid, envinfo.mi_meta2_sign,
-                   envinfo.mi_meta1_txnid, envinfo.mi_meta1_sign,
-                   roolback2steady)
-               ? 1
-               : 2;
-
-  return meta_ot(envinfo.mi_meta0_txnid, envinfo.mi_meta0_sign,
-                 envinfo.mi_meta2_txnid, envinfo.mi_meta2_sign, roolback2steady)
-             ? 2
-             : 0;
-}
-
-static __inline int meta_tail(int head) {
-
-  if (head == 0)
-    return meta_ot(envinfo.mi_meta1_txnid, envinfo.mi_meta1_sign,
-                   envinfo.mi_meta2_txnid, envinfo.mi_meta2_sign, true)
-               ? 1
-               : 2;
-  if (head == 1)
-    return meta_ot(envinfo.mi_meta0_txnid, envinfo.mi_meta0_sign,
-                   envinfo.mi_meta2_txnid, envinfo.mi_meta2_sign, true)
-               ? 0
-               : 2;
-  if (head == 2)
-    return meta_ot(envinfo.mi_meta0_txnid, envinfo.mi_meta0_sign,
-                   envinfo.mi_meta1_txnid, envinfo.mi_meta1_sign, true)
-               ? 0
-               : 1;
-  assert(false);
-  return -1;
-}
-
-static int meta_steady(void) { return meta_recent(true); }
-
-static int meta_head(void) { return meta_recent(false); }
-
-void verbose_meta(int num, txnid_t txnid, uint64_t sign, uint64_t bootid_h,
-                  uint64_t bootid_l) {
-  print(" - meta-%d: %s %" PRIu64, num, meta_synctype(sign), txnid);
-  bool stay = true;
-  const bool bootid_match = bootid_h == envinfo.mi_bootid.current.h &&
-                            bootid_l == envinfo.mi_bootid.current.l &&
-                            (bootid_h | bootid_l) != 0;
-
-  const int steady = meta_steady();
-  const int head = meta_head();
-  if (num == steady && num == head) {
-    print(", head");
-    stay = false;
-  } else if (num == steady) {
-    print(", head-steady");
-    stay = false;
-  } else if (num == head) {
-    print(", head-weak%s", bootid_match ? "-intact (same boot-id)" : "");
-    stay = false;
-  }
-  if (num == meta_tail(head)) {
-    print(", tail");
-    stay = false;
-  }
-  if (stay)
-    print(", stay");
-
-  if (txnid > envinfo.mi_recent_txnid &&
-      (envflags & (MDBX_EXCLUSIVE | MDBX_RDONLY)) == MDBX_EXCLUSIVE)
-    print(", rolled-back %" PRIu64 " (%" PRIu64 " >>> %" PRIu64 ")",
-          txnid - envinfo.mi_recent_txnid, txnid, envinfo.mi_recent_txnid);
-  print("\n");
-}
-
-static uint64_t get_meta_txnid(const unsigned meta_id) {
-  switch (meta_id) {
-  default:
-    assert(false);
-    error("unexpected meta_id %u\n", meta_id);
-    return 0;
-  case 0:
-    return envinfo.mi_meta0_txnid;
-  case 1:
-    return envinfo.mi_meta1_txnid;
-  case 2:
-    return envinfo.mi_meta2_txnid;
-  }
-}
-
-static void print_size(const char *prefix, const uint64_t value,
-                       const char *suffix) {
-  const char sf[] =
-      "KMGTPEZY"; /* LY: Kilo, Mega, Giga, Tera, Peta, Exa, Zetta, Yotta! */
-  double k = 1024.0;
-  size_t i;
-  for (i = 0; sf[i + 1] && value / k > 1000.0; ++i)
-    k *= 1024;
-  print("%s%" PRIu64 " (%.2f %cb)%s", prefix, value, value / k, sf[i], suffix);
-}
-
-int main(int argc, char *argv[]) {
-  int rc;
-  char *prog = argv[0];
-  char *envname;
-  int problems_maindb = 0, problems_freedb = 0, problems_meta = 0;
-  bool locked = false;
-
-  double elapsed;
-#if defined(_WIN32) || defined(_WIN64)
-  uint64_t timestamp_start, timestamp_finish;
-  timestamp_start = GetTickCount64();
-#else
-  struct timespec timestamp_start, timestamp_finish;
-  if (clock_gettime(CLOCK_MONOTONIC, &timestamp_start)) {
-    rc = errno;
-    error("clock_gettime failed, error %d %s\n", rc, mdbx_strerror(rc));
-    return EXIT_FAILURE_SYS;
-  }
-#endif
-  DECLARE_VERSION();
-
-  dbi_meta.name = "@META";
-  dbi_free.name = "@GC";
-  dbi_main.name = "@MAIN";
-  atexit(pagemap_cleanup);
-
-  if (argc < 2)
-    usage(prog);
-
-  for (int i; (i = getopt(argc, argv, "Vvqnwcdsi:")) != EOF;) {
-    switch (i) {
-    case 'V':
-      printf("mdbx_chk version %d.%d.%d.%d\n"
-             " - source: %s %s, commit %s, tree %s\n"
-             " - anchor: %s\n"
-             " - build: %s for %s by %s\n"
-             " - flags: %s\n"
-             " - options: %s\n",
-             MDBX_version.major, MDBX_version.minor, MDBX_version.release,
-             MDBX_version.revision, MDBX_version.git.describe,
-             MDBX_version.git.datetime, MDBX_version.git.commit,
-             MDBX_version.git.tree, MDBX_sourcery_anchor, MDBX_build.datetime,
-             MDBX_build.target, MDBX_build.compiler, MDBX_build.flags,
-             MDBX_build.options);
-      return EXIT_SUCCESS;
-    case 'v':
-      verbose++;
-      break;
-    case 'q':
-      quiet = true;
-      break;
-    case 'n':
-      envflags |= MDBX_NOSUBDIR;
-      break;
-    case 'w':
-      envflags &= ~MDBX_RDONLY;
-      break;
-    case 'c':
-      envflags = (envflags & ~MDBX_EXCLUSIVE) | MDBX_ACCEDE;
-      break;
-    case 'd':
-      dont_traversal = true;
-      break;
-    case 's':
-      if (only_subdb && strcmp(only_subdb, optarg))
-        usage(prog);
-      only_subdb = optarg;
-      break;
-    case 'i':
-      ignore_wrong_order = true;
-      break;
-    default:
-      usage(prog);
-    }
-  }
-
-  if (optind != argc - 1)
-    usage(prog);
-
-#if defined(_WIN32) || defined(_WIN64)
-  SetConsoleCtrlHandler(ConsoleBreakHandlerRoutine, true);
-#else
-#ifdef SIGPIPE
-  signal(SIGPIPE, signal_handler);
-#endif
-#ifdef SIGHUP
-  signal(SIGHUP, signal_handler);
-#endif
-  signal(SIGINT, signal_handler);
-  signal(SIGTERM, signal_handler);
-#endif /* !WINDOWS */
-
-  envname = argv[optind];
-  print("mdbx_chk %s (%s, T-%s)\nRunning for %s in 'read-%s' mode...\n",
-        MDBX_version.git.describe, MDBX_version.git.datetime,
-        MDBX_version.git.tree, envname,
-        (envflags & MDBX_RDONLY) ? "only" : "write");
-  fflush(NULL);
-
-  rc = mdbx_env_create(&env);
-  if (rc) {
-    error("mdbx_env_create failed, error %d %s\n", rc, mdbx_strerror(rc));
-    return rc < 0 ? EXIT_FAILURE_MDB : EXIT_FAILURE_SYS;
-  }
-
-  rc = mdbx_env_set_maxdbs(env, MAX_DBI);
-  if (rc) {
-    error("mdbx_env_set_maxdbs failed, error %d %s\n", rc, mdbx_strerror(rc));
-    goto bailout;
-  }
-
-  rc = mdbx_env_open(env, envname, envflags, 0);
-  if ((envflags & MDBX_EXCLUSIVE) &&
-      (rc == MDBX_BUSY ||
-#if defined(_WIN32) || defined(_WIN64)
-       rc == ERROR_LOCK_VIOLATION || rc == ERROR_SHARING_VIOLATION
-#else
-       rc == EBUSY || rc == EAGAIN
-#endif
-       )) {
-    envflags &= ~MDBX_EXCLUSIVE;
-    rc = mdbx_env_open(env, envname, envflags | MDBX_ACCEDE, 0);
-  }
-
-  if (rc) {
-    error("mdbx_env_open failed, error %d %s\n", rc, mdbx_strerror(rc));
-    if (rc == MDBX_WANNA_RECOVERY && (envflags & MDBX_RDONLY))
-      print("Please run %s in the read-write mode (with '-w' option).\n", prog);
-    goto bailout;
-  }
-  if (verbose)
-    print(" - %s mode\n",
-          (envflags & MDBX_EXCLUSIVE) ? "monopolistic" : "cooperative");
-
-  if ((envflags & MDBX_RDONLY) == 0) {
-    rc = mdbx_txn_lock(env, false);
-    if (rc != MDBX_SUCCESS) {
-      error("mdbx_txn_lock failed, error %d %s\n", rc, mdbx_strerror(rc));
-      goto bailout;
-    }
-    locked = true;
-  }
-
-  rc = mdbx_txn_begin(env, NULL, MDBX_RDONLY, &txn);
-  if (rc) {
-    error("mdbx_txn_begin() failed, error %d %s\n", rc, mdbx_strerror(rc));
-    goto bailout;
-  }
-
-  rc = mdbx_env_info_ex(env, txn, &envinfo, sizeof(envinfo));
-  if (rc) {
-    error("mdbx_env_info failed, error %d %s\n", rc, mdbx_strerror(rc));
-    goto bailout;
-  }
-
-  rc = mdbx_env_stat_ex(env, txn, &envstat, sizeof(envstat));
-  if (rc) {
-    error("mdbx_env_stat failed, error %d %s\n", rc, mdbx_strerror(rc));
-    goto bailout;
-  }
-
-  mdbx_filehandle_t dxb_fd;
-  rc = mdbx_env_get_fd(env, &dxb_fd);
-  if (rc) {
-    error("mdbx_env_get_fd failed, error %d %s\n", rc, mdbx_strerror(rc));
-    goto bailout;
-  }
-
-  uint64_t dxb_filesize = 0;
-#if defined(_WIN32) || defined(_WIN64)
-  {
-    BY_HANDLE_FILE_INFORMATION info;
-    if (!GetFileInformationByHandle(dxb_fd, &info))
-      rc = GetLastError();
-    else
-      dxb_filesize = info.nFileSizeLow | (uint64_t)info.nFileSizeHigh << 32;
-  }
-#else
-  {
-    struct stat st;
-    STATIC_ASSERT_MSG(sizeof(off_t) <= sizeof(uint64_t),
-                      "libmdbx requires 64-bit file I/O on 64-bit systems");
-    if (fstat(dxb_fd, &st))
-      rc = errno;
-    else
-      dxb_filesize = st.st_size;
-  }
-#endif
-  if (rc) {
-    error("mdbx_filesize failed, error %d %s\n", rc, mdbx_strerror(rc));
-    goto bailout;
-  }
-
-  errno = 0;
-  const uint64_t dxbfile_pages = dxb_filesize / envinfo.mi_dxb_pagesize;
-  alloc_pages = txn->mt_next_pgno;
-  backed_pages = envinfo.mi_geo.current / envinfo.mi_dxb_pagesize;
-  if (backed_pages > dxbfile_pages) {
-    print(" ! backed-pages %" PRIu64 " > file-pages %" PRIu64 "\n",
-          backed_pages, dxbfile_pages);
-    ++problems_meta;
-  }
-  if (dxbfile_pages < NUM_METAS)
-    print(" ! file-pages %" PRIu64 " < %u\n", dxbfile_pages, NUM_METAS);
-  if (backed_pages < NUM_METAS)
-    print(" ! backed-pages %" PRIu64 " < %u\n", backed_pages, NUM_METAS);
-  if (backed_pages < NUM_METAS || dxbfile_pages < NUM_METAS)
-    goto bailout;
-  if (backed_pages > MAX_PAGENO) {
-    print(" ! backed-pages %" PRIu64 " > max-pages %" PRIaPGNO "\n",
-          backed_pages, MAX_PAGENO);
-    ++problems_meta;
-    backed_pages = MAX_PAGENO;
-  }
-
-  if ((envflags & (MDBX_EXCLUSIVE | MDBX_RDONLY)) != MDBX_RDONLY) {
-    if (backed_pages > dxbfile_pages) {
-      print(" ! backed-pages %" PRIu64 " > file-pages %" PRIu64 "\n",
-            backed_pages, dxbfile_pages);
-      ++problems_meta;
-      backed_pages = dxbfile_pages;
-    }
-    if (alloc_pages > backed_pages) {
-      print(" ! alloc-pages %" PRIu64 " > backed-pages %" PRIu64 "\n",
-            alloc_pages, backed_pages);
-      ++problems_meta;
-      alloc_pages = backed_pages;
-    }
-  } else {
-    /* LY: DB may be shrinked by writer downto the allocated pages. */
-    if (alloc_pages > backed_pages) {
-      print(" ! alloc-pages %" PRIu64 " > backed-pages %" PRIu64 "\n",
-            alloc_pages, backed_pages);
-      ++problems_meta;
-      alloc_pages = backed_pages;
-    }
-    if (alloc_pages > dxbfile_pages) {
-      print(" ! alloc-pages %" PRIu64 " > file-pages %" PRIu64 "\n",
-            alloc_pages, dxbfile_pages);
-      ++problems_meta;
-      alloc_pages = dxbfile_pages;
-    }
-    if (backed_pages > dxbfile_pages)
-      backed_pages = dxbfile_pages;
-  }
-
-  if (verbose) {
-    print(" - pagesize %u (%u system), max keysize %d..%d"
-          ", max readers %u\n",
-          envinfo.mi_dxb_pagesize, envinfo.mi_sys_pagesize,
-          mdbx_env_get_maxkeysize_ex(env, MDBX_DUPSORT),
-          mdbx_env_get_maxkeysize_ex(env, 0), envinfo.mi_maxreaders);
-    print_size(" - mapsize ", envinfo.mi_mapsize, "\n");
-    if (envinfo.mi_geo.lower == envinfo.mi_geo.upper)
-      print_size(" - fixed datafile: ", envinfo.mi_geo.current, "");
-    else {
-      print_size(" - dynamic datafile: ", envinfo.mi_geo.lower, "");
-      print_size(" .. ", envinfo.mi_geo.upper, ", ");
-      print_size("+", envinfo.mi_geo.grow, ", ");
-      print_size("-", envinfo.mi_geo.shrink, "\n");
-      print_size(" - current datafile: ", envinfo.mi_geo.current, "");
-    }
-    printf(", %" PRIu64 " pages\n",
-           envinfo.mi_geo.current / envinfo.mi_dxb_pagesize);
-#if defined(_WIN32) || defined(_WIN64)
-    if (envinfo.mi_geo.shrink && envinfo.mi_geo.current != envinfo.mi_geo.upper)
-      print("                     WARNING: Due Windows system limitations a "
-            "file couldn't\n                     be truncated while database "
-            "is opened. So, the size of\n                     database file "
-            "may by large than the database itself,\n                     "
-            "until it will be closed or reopened in read-write mode.\n");
-#endif
-    print(" - transactions: recent %" PRIu64 ", latter reader %" PRIu64
-          ", lag %" PRIi64 "\n",
-          envinfo.mi_recent_txnid, envinfo.mi_latter_reader_txnid,
-          envinfo.mi_recent_txnid - envinfo.mi_latter_reader_txnid);
-
-    verbose_meta(0, envinfo.mi_meta0_txnid, envinfo.mi_meta0_sign,
-                 envinfo.mi_bootid.meta0.h, envinfo.mi_bootid.meta0.l);
-    verbose_meta(1, envinfo.mi_meta1_txnid, envinfo.mi_meta1_sign,
-                 envinfo.mi_bootid.meta1.h, envinfo.mi_bootid.meta1.l);
-    verbose_meta(2, envinfo.mi_meta2_txnid, envinfo.mi_meta2_sign,
-                 envinfo.mi_bootid.meta2.h, envinfo.mi_bootid.meta2.l);
-  }
-
-  if (verbose > 1)
-    print(" - performs check for meta-pages clashes\n");
-  if (meta_eq(envinfo.mi_meta0_txnid, envinfo.mi_meta0_sign,
-              envinfo.mi_meta1_txnid, envinfo.mi_meta1_sign)) {
-    print(" ! meta-%d and meta-%d are clashed\n", 0, 1);
-    ++problems_meta;
-  }
-  if (meta_eq(envinfo.mi_meta1_txnid, envinfo.mi_meta1_sign,
-              envinfo.mi_meta2_txnid, envinfo.mi_meta2_sign)) {
-    print(" ! meta-%d and meta-%d are clashed\n", 1, 2);
-    ++problems_meta;
-  }
-  if (meta_eq(envinfo.mi_meta2_txnid, envinfo.mi_meta2_sign,
-              envinfo.mi_meta0_txnid, envinfo.mi_meta0_sign)) {
-    print(" ! meta-%d and meta-%d are clashed\n", 2, 0);
-    ++problems_meta;
-  }
-
-  const unsigned steady_meta_id = meta_recent(true);
-  const uint64_t steady_meta_txnid = get_meta_txnid(steady_meta_id);
-  const unsigned weak_meta_id = meta_recent(false);
-  const uint64_t weak_meta_txnid = get_meta_txnid(weak_meta_id);
-  if (envflags & MDBX_EXCLUSIVE) {
-    if (verbose > 1)
-      print(" - performs full check recent-txn-id with meta-pages\n");
-    if (steady_meta_txnid != envinfo.mi_recent_txnid) {
-      print(" ! steady meta-%d txn-id mismatch recent-txn-id (%" PRIi64
-            " != %" PRIi64 ")\n",
-            steady_meta_id, steady_meta_txnid, envinfo.mi_recent_txnid);
-      ++problems_meta;
-    }
-  } else if (locked) {
-    if (verbose > 1)
-      print(" - performs lite check recent-txn-id with meta-pages (not a "
-            "monopolistic mode)\n");
-    if (weak_meta_txnid != envinfo.mi_recent_txnid) {
-      print(" ! weak meta-%d txn-id mismatch recent-txn-id (%" PRIi64
-            " != %" PRIi64 ")\n",
-            weak_meta_id, weak_meta_txnid, envinfo.mi_recent_txnid);
-      ++problems_meta;
-    }
-  } else if (verbose) {
-    print(" - skip check recent-txn-id with meta-pages (monopolistic or "
-          "read-write mode only)\n");
-  }
-  total_problems += problems_meta;
-
-  if (!dont_traversal) {
-    struct problem *saved_list;
-    size_t traversal_problems;
-    uint64_t empty_pages, lost_bytes;
-
-    print("Traversal b-tree by txn#%" PRIaTXN "...\n", txn->mt_txnid);
-    fflush(NULL);
-    walk.pagemap = (short *)mdbx_calloc((size_t)backed_pages, sizeof(*walk.pagemap));
-    if (!walk.pagemap) {
-      rc = errno ? errno : MDBX_ENOMEM;
-      error("calloc failed, error %d %s\n", rc, mdbx_strerror(rc));
-      goto bailout;
-    }
-
-    saved_list = problems_push();
-    rc = mdbx_env_pgwalk(txn, pgvisitor, NULL);
-    traversal_problems = problems_pop(saved_list);
-
-    if (rc) {
-      if (rc != MDBX_EINTR || !check_user_break())
-        error("mdbx_env_pgwalk failed, error %d %s\n", rc, mdbx_strerror(rc));
-      goto bailout;
-    }
-
-    for (uint64_t n = 0; n < alloc_pages; ++n)
-      if (!walk.pagemap[n])
-        unused_pages += 1;
-
-    empty_pages = lost_bytes = 0;
-    for (walk_dbi_t *dbi = &dbi_main; dbi < ARRAY_END(walk.dbi) && dbi->name;
-         ++dbi) {
-      empty_pages += dbi->pages.empty;
-      lost_bytes += dbi->lost_bytes;
-    }
-
-    if (verbose) {
-      uint64_t total_page_bytes = walk.pgcount * envstat.ms_psize;
-      print(" - pages: total %" PRIu64 ", unused %" PRIu64 "\n", walk.pgcount,
-            unused_pages);
-      if (verbose > 1) {
-        for (walk_dbi_t *dbi = walk.dbi; dbi < ARRAY_END(walk.dbi) && dbi->name;
-             ++dbi) {
-          print("     %s: subtotal %" PRIu64, dbi->name, dbi->pages.total);
-          if (dbi->pages.other && dbi->pages.other != dbi->pages.total)
-            print(", other %" PRIu64, dbi->pages.other);
-          if (dbi->pages.branch)
-            print(", branch %" PRIu64, dbi->pages.branch);
-          if (dbi->pages.large_count)
-            print(", large %" PRIu64, dbi->pages.large_count);
-          uint64_t all_leaf = dbi->pages.leaf + dbi->pages.leaf_dupfixed;
-          if (all_leaf) {
-            print(", leaf %" PRIu64, all_leaf);
-            if (verbose > 2 &&
-                (dbi->pages.leaf_dupfixed | dbi->pages.subleaf_dupsort |
-                 dbi->pages.subleaf_dupsort))
-              print(" (usual %" PRIu64 ", sub-dupsort %" PRIu64
-                    ", dupfixed %" PRIu64 ", sub-dupfixed %" PRIu64 ")",
-                    dbi->pages.leaf, dbi->pages.subleaf_dupsort,
-                    dbi->pages.leaf_dupfixed, dbi->pages.subleaf_dupfixed);
-          }
-          print("\n");
-        }
-      }
-
-      if (verbose > 1)
-        print(" - usage: total %" PRIu64 " bytes, payload %" PRIu64
-              " (%.1f%%), unused "
-              "%" PRIu64 " (%.1f%%)\n",
-              total_page_bytes, walk.total_payload_bytes,
-              walk.total_payload_bytes * 100.0 / total_page_bytes,
-              total_page_bytes - walk.total_payload_bytes,
-              (total_page_bytes - walk.total_payload_bytes) * 100.0 /
-                  total_page_bytes);
-      if (verbose > 2) {
-        for (walk_dbi_t *dbi = walk.dbi; dbi < ARRAY_END(walk.dbi) && dbi->name;
-             ++dbi)
-          if (dbi->pages.total) {
-            uint64_t dbi_bytes = dbi->pages.total * envstat.ms_psize;
-            print("     %s: subtotal %" PRIu64 " bytes (%.1f%%),"
-                  " payload %" PRIu64 " (%.1f%%), unused %" PRIu64 " (%.1f%%)",
-                  dbi->name, dbi_bytes, dbi_bytes * 100.0 / total_page_bytes,
-                  dbi->payload_bytes, dbi->payload_bytes * 100.0 / dbi_bytes,
-                  dbi_bytes - dbi->payload_bytes,
-                  (dbi_bytes - dbi->payload_bytes) * 100.0 / dbi_bytes);
-            if (dbi->pages.empty)
-              print(", %" PRIu64 " empty pages", dbi->pages.empty);
-            if (dbi->lost_bytes)
-              print(", %" PRIu64 " bytes lost", dbi->lost_bytes);
-            print("\n");
-          } else
-            print("     %s: empty\n", dbi->name);
-      }
-      print(" - summary: average fill %.1f%%",
-            walk.total_payload_bytes * 100.0 / total_page_bytes);
-      if (empty_pages)
-        print(", %" PRIu64 " empty pages", empty_pages);
-      if (lost_bytes)
-        print(", %" PRIu64 " bytes lost", lost_bytes);
-      print(", %" PRIuPTR " problems\n", traversal_problems);
-    }
-  } else if (verbose) {
-    print("Skipping b-tree walk...\n");
-    fflush(NULL);
-  }
-
-  if (!verbose)
-    print("Iterating DBIs...\n");
-  problems_maindb = process_db(~0u, /* MAIN_DBI */ NULL, NULL, false);
-  problems_freedb = process_db(FREE_DBI, "@GC", handle_freedb, false);
-
-  if (verbose) {
-    uint64_t value = envinfo.mi_mapsize / envstat.ms_psize;
-    double percent = value / 100.0;
-    print(" - space: %" PRIu64 " total pages", value);
-    print(", backed %" PRIu64 " (%.1f%%)", backed_pages,
-          backed_pages / percent);
-    print(", allocated %" PRIu64 " (%.1f%%)", alloc_pages,
-          alloc_pages / percent);
-
-    if (verbose > 1) {
-      value = envinfo.mi_mapsize / envstat.ms_psize - alloc_pages;
-      print(", remained %" PRIu64 " (%.1f%%)", value, value / percent);
-
-      value = alloc_pages - gc_pages;
-      print(", used %" PRIu64 " (%.1f%%)", value, value / percent);
-
-      print(", gc %" PRIu64 " (%.1f%%)", gc_pages, gc_pages / percent);
-
-      value = gc_pages - reclaimable_pages;
-      print(", detained %" PRIu64 " (%.1f%%)", value, value / percent);
-
-      print(", reclaimable %" PRIu64 " (%.1f%%)", reclaimable_pages,
-            reclaimable_pages / percent);
-    }
-
-    value =
-        envinfo.mi_mapsize / envstat.ms_psize - alloc_pages + reclaimable_pages;
-    print(", available %" PRIu64 " (%.1f%%)\n", value, value / percent);
-  }
-
-  if (problems_maindb == 0 && problems_freedb == 0) {
-    if (!dont_traversal &&
-        (envflags & (MDBX_EXCLUSIVE | MDBX_RDONLY)) != MDBX_RDONLY) {
-      if (walk.pgcount != alloc_pages - gc_pages) {
-        error("used pages mismatch (%" PRIu64 "(walked) != %" PRIu64
-              "(allocated - GC))\n",
-              walk.pgcount, alloc_pages - gc_pages);
-      }
-      if (unused_pages != gc_pages) {
-        error("gc pages mismatch (%" PRIu64 "(walked) != %" PRIu64 "(GC))\n",
-              unused_pages, gc_pages);
-      }
-    } else if (verbose) {
-      print(" - skip check used and gc pages (btree-traversal with "
-            "monopolistic or read-write mode only)\n");
-    }
-
-    if (!process_db(MAIN_DBI, NULL, handle_maindb, true)) {
-      if (!userdb_count && verbose)
-        print(" - does not contain multiple databases\n");
-    }
-  }
-
-  if (rc == 0 && total_problems == 1 && problems_meta == 1 && !dont_traversal &&
-      (envflags & MDBX_RDONLY) == 0 && !only_subdb &&
-      steady_meta_txnid < envinfo.mi_recent_txnid) {
-    print("Perform sync-to-disk for make steady checkpoint at txn-id #%" PRIi64
-          "\n",
-          envinfo.mi_recent_txnid);
-    fflush(NULL);
-    if (locked) {
-      mdbx_txn_unlock(env);
-      locked = false;
-    }
-    rc = mdbx_env_sync_ex(env, true, false);
-    if (rc != MDBX_SUCCESS)
-      error("mdbx_env_pgwalk failed, error %d %s\n", rc, mdbx_strerror(rc));
-    else {
-      total_problems -= 1;
-      problems_meta -= 1;
-    }
-  }
-
-bailout:
-  if (txn)
-    mdbx_txn_abort(txn);
-  if (locked) {
-    mdbx_txn_unlock(env);
-    locked = false;
-  }
-  if (env) {
-    const bool dont_sync = rc != 0 || total_problems;
-    mdbx_env_close_ex(env, dont_sync);
-  }
-  fflush(NULL);
-  if (rc) {
-    if (rc < 0)
-      return user_break ? EXIT_INTERRUPTED : EXIT_FAILURE_SYS;
-    return EXIT_FAILURE_MDB;
-  }
-
-#if defined(_WIN32) || defined(_WIN64)
-  timestamp_finish = GetTickCount64();
-  elapsed = (timestamp_finish - timestamp_start) * 1e-3;
-#else
-  if (clock_gettime(CLOCK_MONOTONIC, &timestamp_finish)) {
-    rc = errno;
-    error("clock_gettime failed, error %d %s\n", rc, mdbx_strerror(rc));
-    return EXIT_FAILURE_SYS;
-  }
-  elapsed = timestamp_finish.tv_sec - timestamp_start.tv_sec +
-            (timestamp_finish.tv_nsec - timestamp_start.tv_nsec) * 1e-9;
-#endif /* !WINDOWS */
-
-  if (total_problems) {
-    print("Total %" PRIu64 " error%s detected, elapsed %.3f seconds.\n",
-          total_problems, (total_problems > 1) ? "s are" : " is", elapsed);
-    if (problems_meta || problems_maindb || problems_freedb)
-      return EXIT_FAILURE_CHECK_MAJOR;
-    return EXIT_FAILURE_CHECK_MINOR;
-  }
-  print("No error is detected, elapsed %.3f seconds\n", elapsed);
-  return EXIT_SUCCESS;
-}
diff --git a/tools/mdbx_chk/src/stdafx.cxx b/tools/mdbx_chk/src/stdafx.cxx
deleted file mode 100644
index 77a6bea7ef..0000000000
--- a/tools/mdbx_chk/src/stdafx.cxx
+++ /dev/null
@@ -1,20 +0,0 @@
-/*
-Copyright (C) 2018-20 Miranda NG team (https://miranda-ng.org)
-
-This program is free software; you can redistribute it and/or
-modify it under the terms of the GNU General Public License
-as published by the Free Software Foundation version 2
-of the License.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#include "stdafx.h"
-
-#include "..\..\build\appstub\appstub.cpp"
diff --git a/tools/mdbx_chk/src/stdafx.h b/tools/mdbx_chk/src/stdafx.h
deleted file mode 100644
index f22afc24b5..0000000000
--- a/tools/mdbx_chk/src/stdafx.h
+++ /dev/null
@@ -1,30 +0,0 @@
-/*
-Copyright (C) 2018-20 Miranda NG team (https://miranda-ng.org)
-
-This program is free software; you can redistribute it and/or
-modify it under the terms of the GNU General Public License
-as published by the Free Software Foundation version 2
-of the License.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#pragma once
-
-#include <stdio.h>
-#include <windows.h>
-
-#define DECLARE_VERSION() \
-   mdbx_version_info MDBX_version; \
-   mdbx_build_info MDBX_build; \
-   char* MDBX_sourcery_anchor; \
-   HINSTANCE hDll = LoadLibraryA("libmdbx.mir"); \
-   MDBX_version = *(mdbx_version_info *)GetProcAddress(hDll, "mdbx_version"); \
-   MDBX_build = *(mdbx_build_info*)GetProcAddress(hDll, "mdbx_build"); \
-   MDBX_sourcery_anchor = (char*)GetProcAddress(hDll, "mdbx_sourcery_MDBX_BUILD_SOURCERY");