libmdbx: update to 0.9.2.12 with some useful fixes.

13 files changed, 115 insertions, 68 deletions

diff --git a/libs/libmdbx/src/CMakeLists.txt b/libs/libmdbx/src/CMakeLists.txt
index d41686bf82..789fc4685a 100644
--- a/libs/libmdbx/src/CMakeLists.txt
+++ b/libs/libmdbx/src/CMakeLists.txt
@@ -340,12 +340,14 @@ if(NOT DEFINED MDBX_CXX_STANDARD)
     set(MDBX_CXX_STANDARD 98)
   endif()
 endif()
-# MSVC >= 19.28 (Microsoft Visual Studio 16.8) is mad!
-#               It unable process Windows SDK headers in the C11 mode!
-if(HAS_C11 LESS 0 OR (MSVC AND MSVC_VERSION GREATER 1927))
-  set(MDBX_C_STANDARD 99)
-else()
-  set(MDBX_C_STANDARD 11)
+if(NOT DEFINED MDBX_C_STANDARD)
+  # MSVC >= 19.28 (Microsoft Visual Studio 16.8) is mad!
+  #               It unable process Windows SDK headers in the C11 mode!
+  if(HAS_C11 LESS 0 OR (MSVC AND MSVC_VERSION GREATER 1927))
+    set(MDBX_C_STANDARD 99)
+  else()
+    set(MDBX_C_STANDARD 11)
+  endif()
 endif()
 
 if(${CMAKE_SYSTEM_NAME} STREQUAL "Windows" AND EXISTS "${MDBX_SOURCE_DIR}/ntdll.def")
diff --git a/libs/libmdbx/src/ChangeLog.md b/libs/libmdbx/src/ChangeLog.md
index e7cf79534f..66c5de3705 100644
--- a/libs/libmdbx/src/ChangeLog.md
+++ b/libs/libmdbx/src/ChangeLog.md
@@ -3,6 +3,7 @@ ChangeLog
 
 ## v0.9.3 (in development)
 
+TODO:
  - Engage new terminology (https://github.com/erthink/libmdbx/issues/137).
  - Rework/speedup the implementation of the dirty page list (lazy compactification, lazy sorting via merge).
  - Resolve few TODOs (https://github.com/erthink/libmdbx/issues/123, https://github.com/erthink/libmdbx/issues/124,
@@ -11,6 +12,18 @@ ChangeLog
  - Finalize C++ API (few typos and trivia bugs are still likely for now).
  - Packages for ROSA Linux, ALT Linux, Fedora/RHEL, Debian/Ubuntu.
 
+Acknowledgements:
+ - Mahlon E. Smith (http://www.martini.nu/) for FreeBSD port of libmdbx.
+ - 장세연 (http://www.castis.com) for bug fixing and PR.
+
+Added features:
+ - Package for FreeBSD is available now by Mahlon E. Smith.
+
+Fixes:
+ - Fixed missing cleanup (null assigned) in the C++ commit/abort (https://github.com/erthink/libmdbx/pull/143).
+ - Fixed `mdbx_realloc()` for case of nullptr and `MDBX_AVOID_CRT=ON` for Windows.
+
+
 ## v0.9.2 scheduled at 2020-11-27
 
 Acknowledgements:
@@ -58,6 +71,7 @@ Fixes:
  - Fixed large pages checking (for compatibility and to avoid false-positive errors from `mdbx_chk`).
  - Added workaround for Wine (https://github.com/miranda-ng/miranda-ng/issues/1209).
  - Fixed `ERROR_NOT_SUPPORTED` while opening DB by UNC pathnames (https://github.com/miranda-ng/miranda-ng/issues/2627).
+ - Added handling `EXCEPTION_POSSIBLE_DEADLOCK` condition for Windows.
 
 
 ## v0.9.1 2020-09-30
diff --git a/libs/libmdbx/src/README.md b/libs/libmdbx/src/README.md
index 3f643d2706..799c993c91 100644
--- a/libs/libmdbx/src/README.md
+++ b/libs/libmdbx/src/README.md
@@ -155,7 +155,7 @@ transaction journal. No crash recovery needed. No maintenance is required.
 
 - **Page size**: a power of 2, maximum `65536` bytes, default `4096` bytes.
 - **Key size**: minimum 0, maximum ≈¼ pagesize (`1300` bytes for default 4K pagesize, `21780` bytes for 64K pagesize).
-- **Value size**: minimum 0, maximum `2146435072` (`0x7FF00000`) bytes for maps, ≈¼ pagesize for multimaps (`1348` bytes default 4K pagesize, `21828` bytes for 64K pagesize).
+- **Value size**: minimum 0, maximum `2146435072` (`0x7FF00000`) bytes for maps, ≈¼ pagesize for multimaps (`1348` bytes for default 4K pagesize, `21828` bytes for 64K pagesize).
 - **Write transaction size**: up to `4194301` (`0x3FFFFD`) pages (16 [GiB](https://en.wikipedia.org/wiki/Gibibyte) for default 4K pagesize, 256 [GiB](https://en.wikipedia.org/wiki/Gibibyte) for 64K pagesize).
 - **Database size**: up to `2147483648` pages (8 [TiB](https://en.wikipedia.org/wiki/Tebibyte) for default 4K pagesize, 128 [TiB](https://en.wikipedia.org/wiki/Tebibyte) for 64K pagesize).
 - **Maximum sub-databases**: `32765`.
diff --git a/libs/libmdbx/src/VERSION b/libs/libmdbx/src/VERSION
index 594150e32c..418c133552 100644
--- a/libs/libmdbx/src/VERSION
+++ b/libs/libmdbx/src/VERSION
@@ -1 +1 @@
-0.9.2.0
+0.9.2.12
diff --git a/libs/libmdbx/src/mdbx.c b/libs/libmdbx/src/mdbx.c
index 3bcb83b536..7901b0b90d 100644
--- a/libs/libmdbx/src/mdbx.c
+++ b/libs/libmdbx/src/mdbx.c
@@ -12,7 +12,7 @@
  * <http://www.OpenLDAP.org/license.html>. */
 
 #define MDBX_ALLOY 1
-#define MDBX_BUILD_SOURCERY 47492323531afee427a3de6ddaeae26eed45bfd1b52d92fd121a5a13a9747dbb_v0_9_2_0_g092ab09
+#define MDBX_BUILD_SOURCERY b30bc0044d83cd1275fa00662c8265e39091a931353b79a46d21c9536795acb2_v0_9_2_12_g3e7459b4
 #ifdef MDBX_CONFIG_H
 #include MDBX_CONFIG_H
 #endif
@@ -680,6 +680,7 @@ __extern_C key_t ftok(const char *, int);
 #ifndef WIN32_LEAN_AND_MEAN
 #define WIN32_LEAN_AND_MEAN
 #endif
+#include <excpt.h>
 #include <tlhelp32.h>
 #include <windows.h>
 #include <winnt.h>
@@ -714,7 +715,8 @@ static inline void *mdbx_calloc(size_t nelem, size_t size) {
 
 #ifndef mdbx_realloc
 static inline void *mdbx_realloc(void *ptr, size_t bytes) {
-  return LocalReAlloc(ptr, bytes, LMEM_MOVEABLE);
+  return ptr ? LocalReAlloc(ptr, bytes, LMEM_MOVEABLE)
+             : LocalAlloc(LMEM_FIXED, bytes);
 }
 #endif /* mdbx_realloc */
 
@@ -14865,7 +14867,7 @@ static int mdbx_cursor_sibling(MDBX_cursor *mc, int dir) {
     }
   } else {
     assert((dir - 1) == -1 || (dir - 1) == 1);
-    mc->mc_ki[mc->mc_top] += dir - 1;
+    mc->mc_ki[mc->mc_top] += (indx_t)(dir - 1);
     mdbx_debug("just moving to %s index key %u",
                (dir == SIBLING_RIGHT) ? "right" : "left",
                mc->mc_ki[mc->mc_top]);
@@ -14940,7 +14942,7 @@ static int mdbx_cursor_next(MDBX_cursor *mc, MDBX_val *key, MDBX_val *data,
   const int numkeys = page_numkeys(mp);
   if (unlikely(ki >= numkeys)) {
     mdbx_debug("%s", "=====> move to next sibling page");
-    mc->mc_ki[mc->mc_top] = numkeys - 1;
+    mc->mc_ki[mc->mc_top] = (indx_t)(numkeys - 1);
     if (unlikely((rc = mdbx_cursor_sibling(mc, SIBLING_RIGHT)) !=
                  MDBX_SUCCESS)) {
       mc->mc_flags |= C_EOF;
@@ -23566,7 +23568,15 @@ MDBX_INTERNAL_FUNC int mdbx_fastmutex_destroy(mdbx_fastmutex_t *fastmutex) {
 
 MDBX_INTERNAL_FUNC int mdbx_fastmutex_acquire(mdbx_fastmutex_t *fastmutex) {
 #if defined(_WIN32) || defined(_WIN64)
-  EnterCriticalSection(fastmutex);
+  __try {
+    EnterCriticalSection(fastmutex);
+  } __except (
+      (GetExceptionCode() ==
+       0xC0000194 /* STATUS_POSSIBLE_DEADLOCK / EXCEPTION_POSSIBLE_DEADLOCK */)
+          ? EXCEPTION_EXECUTE_HANDLER
+          : EXCEPTION_CONTINUE_SEARCH) {
+    return ERROR_POSSIBLE_DEADLOCK;
+  }
   return MDBX_SUCCESS;
 #else
   return pthread_mutex_lock(fastmutex);
@@ -25413,9 +25423,9 @@ __dll_export
         0,
         9,
         2,
-        0,
-        {"2020-11-27T10:09:03+03:00", "481b41a5b377ff247625bd2cec60c0ca84f2f2f5", "092ab094c4f8e7c704030568db62bad5d106755f",
-         "v0.9.2-0-g092ab09"},
+        12,
+        {"2020-12-05T09:45:03+03:00", "455c7d633b3e490fe4f1e8c9999adccdf358f699", "3e7459b428373404e3c8ce238bd4061fa9d18f79",
+         "v0.9.2-12-g3e7459b4"},
         sourcery};
 
 __dll_export
@@ -25576,7 +25586,15 @@ int mdbx_txn_lock(MDBX_env *env, bool dontwait) {
     if (!TryEnterCriticalSection(&env->me_windowsbug_lock))
       return MDBX_BUSY;
   } else {
-    EnterCriticalSection(&env->me_windowsbug_lock);
+    __try {
+      EnterCriticalSection(&env->me_windowsbug_lock);
+    }
+    __except ((GetExceptionCode() ==
+                 0xC0000194 /* STATUS_POSSIBLE_DEADLOCK / EXCEPTION_POSSIBLE_DEADLOCK */)
+                    ? EXCEPTION_EXECUTE_HANDLER
+                    : EXCEPTION_CONTINUE_SEARCH) {
+      return ERROR_POSSIBLE_DEADLOCK;
+    }
   }
 
   if ((env->me_flags & MDBX_EXCLUSIVE) ||
diff --git a/libs/libmdbx/src/mdbx.c++ b/libs/libmdbx/src/mdbx.c++
index e3c3552b39..4f54ad8efb 100644
--- a/libs/libmdbx/src/mdbx.c++
+++ b/libs/libmdbx/src/mdbx.c++
@@ -12,7 +12,7 @@
  * <http://www.OpenLDAP.org/license.html>. */
 
 #define MDBX_ALLOY 1
-#define MDBX_BUILD_SOURCERY 47492323531afee427a3de6ddaeae26eed45bfd1b52d92fd121a5a13a9747dbb_v0_9_2_0_g092ab09
+#define MDBX_BUILD_SOURCERY b30bc0044d83cd1275fa00662c8265e39091a931353b79a46d21c9536795acb2_v0_9_2_12_g3e7459b4
 #ifdef MDBX_CONFIG_H
 #include MDBX_CONFIG_H
 #endif
@@ -680,6 +680,7 @@ __extern_C key_t ftok(const char *, int);
 #ifndef WIN32_LEAN_AND_MEAN
 #define WIN32_LEAN_AND_MEAN
 #endif
+#include <excpt.h>
 #include <tlhelp32.h>
 #include <windows.h>
 #include <winnt.h>
@@ -714,7 +715,8 @@ static inline void *mdbx_calloc(size_t nelem, size_t size) {
 
 #ifndef mdbx_realloc
 static inline void *mdbx_realloc(void *ptr, size_t bytes) {
-  return LocalReAlloc(ptr, bytes, LMEM_MOVEABLE);
+  return ptr ? LocalReAlloc(ptr, bytes, LMEM_MOVEABLE)
+             : LocalAlloc(LMEM_FIXED, bytes);
 }
 #endif /* mdbx_realloc */
 
@@ -4343,20 +4345,18 @@ txn_managed::~txn_managed() noexcept {
 
 void txn_managed::abort() {
   const error err = static_cast<MDBX_error_t>(::mdbx_txn_abort(handle_));
-  if (MDBX_UNLIKELY(err.code() != MDBX_SUCCESS)) {
-    if (err.code() != MDBX_THREAD_MISMATCH)
-      handle_ = nullptr;
+  if (MDBX_LIKELY(err.code() != MDBX_THREAD_MISMATCH))
+    handle_ = nullptr;
+  if (MDBX_UNLIKELY(err.code() != MDBX_SUCCESS))
     err.throw_exception();
-  }
 }
 
 void txn_managed::commit() {
   const error err = static_cast<MDBX_error_t>(::mdbx_txn_commit(handle_));
-  if (MDBX_UNLIKELY(err.code() != MDBX_SUCCESS)) {
-    if (err.code() != MDBX_THREAD_MISMATCH)
-      handle_ = nullptr;
+  if (MDBX_LIKELY(err.code() != MDBX_THREAD_MISMATCH))
+    handle_ = nullptr;
+  if (MDBX_UNLIKELY(err.code() != MDBX_SUCCESS))
     err.throw_exception();
-  }
 }
 
 //------------------------------------------------------------------------------
diff --git a/libs/libmdbx/src/mdbx.h b/libs/libmdbx/src/mdbx.h
index 966cf2e701..2a6a2d7893 100644
--- a/libs/libmdbx/src/mdbx.h
+++ b/libs/libmdbx/src/mdbx.h
@@ -306,7 +306,7 @@ typedef mode_t mdbx_mode_t;
 #define MDBX_NOTHROW_CONST_FUNCTION [[const]]
 #else
 #define MDBX_NOTHROW_CONST_FUNCTION MDBX_NOTHROW_PURE_FUNCTION
-#endif /* MDBX_NOTHROW_PURE_FUNCTION */
+#endif /* MDBX_NOTHROW_CONST_FUNCTION */
 
 #ifndef MDBX_DEPRECATED /* may be predefined to avoid warnings "deprecated" */
 #ifdef __deprecated
@@ -375,8 +375,8 @@ typedef mode_t mdbx_mode_t;
 #endif
 #endif /* bool without __cplusplus */
 
-#if !defined(__cpp_noexcept_function_type) ||                                  \
-    __cpp_noexcept_function_type < 201510L
+#if !defined(DOXYGEN) && (!defined(__cpp_noexcept_function_type) ||            \
+                          __cpp_noexcept_function_type < 201510L)
 #define MDBX_CXX17_NOEXCEPT
 #else
 #define MDBX_CXX17_NOEXCEPT noexcept
@@ -386,12 +386,13 @@ typedef mode_t mdbx_mode_t;
 #if !defined(__cplusplus)
 #define MDBX_CXX01_CONSTEXPR __inline
 #define MDBX_CXX01_CONSTEXPR_VAR const
-#elif !defined(__cpp_constexpr) || __cpp_constexpr < 200704L ||                \
-    (defined(__LCC__) && __LCC__ < 124) ||                                     \
-    (defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__ < 407) &&           \
-     !defined(__clang__) && !defined(__LCC__)) ||                              \
-    (defined(_MSC_VER) && _MSC_VER < 1910) ||                                  \
-    (defined(__clang__) && __clang_major__ < 4)
+#elif !defined(DOXYGEN) &&                                                     \
+    (!defined(__cpp_constexpr) || __cpp_constexpr < 200704L ||                 \
+     (defined(__LCC__) && __LCC__ < 124) ||                                    \
+     (defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__ < 407) &&          \
+      !defined(__clang__) && !defined(__LCC__)) ||                             \
+     (defined(_MSC_VER) && _MSC_VER < 1910) ||                                 \
+     (defined(__clang__) && __clang_major__ < 4))
 #define MDBX_CXX01_CONSTEXPR inline
 #define MDBX_CXX01_CONSTEXPR_VAR const
 #else
@@ -402,12 +403,13 @@ typedef mode_t mdbx_mode_t;
 #if !defined(__cplusplus)
 #define MDBX_CXX11_CONSTEXPR __inline
 #define MDBX_CXX11_CONSTEXPR_VAR const
-#elif !defined(__cpp_constexpr) || __cpp_constexpr < 201304 ||                 \
-    (defined(__LCC__) && __LCC__ < 124) ||                                     \
-    (defined(__GNUC__) && __GNUC__ < 6 && !defined(__clang__) &&               \
-     !defined(__LCC__)) ||                                                     \
-    (defined(_MSC_VER) && _MSC_VER < 1910) ||                                  \
-    (defined(__clang__) && __clang_major__ < 5)
+#elif !defined(DOXYGEN) &&                                                     \
+    (!defined(__cpp_constexpr) || __cpp_constexpr < 201304 ||                  \
+     (defined(__LCC__) && __LCC__ < 124) ||                                    \
+     (defined(__GNUC__) && __GNUC__ < 6 && !defined(__clang__) &&              \
+      !defined(__LCC__)) ||                                                    \
+     (defined(_MSC_VER) && _MSC_VER < 1910) ||                                 \
+     (defined(__clang__) && __clang_major__ < 5))
 #define MDBX_CXX11_CONSTEXPR inline
 #define MDBX_CXX11_CONSTEXPR_VAR const
 #else
@@ -418,11 +420,12 @@ typedef mode_t mdbx_mode_t;
 #if !defined(__cplusplus)
 #define MDBX_CXX14_CONSTEXPR __inline
 #define MDBX_CXX14_CONSTEXPR_VAR const
-#elif defined(__cpp_constexpr) && __cpp_constexpr >= 201304L &&                \
-    ((defined(_MSC_VER) && _MSC_VER >= 1910) ||                                \
-     (defined(__clang__) && __clang_major__ > 4) ||                            \
-     (defined(__GNUC__) && __GNUC__ > 6) ||                                    \
-     (!defined(__GNUC__) && !defined(__clang__) && !defined(_MSC_VER)))
+#elif defined(DOXYGEN) ||                                                      \
+    defined(__cpp_constexpr) && __cpp_constexpr >= 201304L &&                  \
+        ((defined(_MSC_VER) && _MSC_VER >= 1910) ||                            \
+         (defined(__clang__) && __clang_major__ > 4) ||                        \
+         (defined(__GNUC__) && __GNUC__ > 6) ||                                \
+         (!defined(__GNUC__) && !defined(__clang__) && !defined(_MSC_VER)))
 #define MDBX_CXX14_CONSTEXPR constexpr
 #define MDBX_CXX14_CONSTEXPR_VAR constexpr
 #else
@@ -477,27 +480,25 @@ typedef mode_t mdbx_mode_t;
 #define DEFINE_ENUM_FLAG_OPERATORS(ENUM)                                       \
   extern "C++" {                                                               \
   MDBX_CXX01_CONSTEXPR ENUM operator|(ENUM a, ENUM b) {                        \
-    return ENUM(std::size_t(a) | std::size_t(b));                              \
+    return ENUM(unsigned(a) | unsigned(b));                                    \
   }                                                                            \
   MDBX_CXX14_CONSTEXPR ENUM &operator|=(ENUM &a, ENUM b) { return a = a | b; } \
   MDBX_CXX01_CONSTEXPR ENUM operator&(ENUM a, ENUM b) {                        \
-    return ENUM(std::size_t(a) & std::size_t(b));                              \
+    return ENUM(unsigned(a) & unsigned(b));                                    \
   }                                                                            \
-  MDBX_CXX01_CONSTEXPR ENUM operator&(ENUM a, size_t b) {                      \
-    return ENUM(std::size_t(a) & b);                                           \
+  MDBX_CXX01_CONSTEXPR ENUM operator&(ENUM a, unsigned b) {                    \
+    return ENUM(unsigned(a) & b);                                              \
   }                                                                            \
-  MDBX_CXX01_CONSTEXPR ENUM operator&(size_t a, ENUM b) {                      \
-    return ENUM(a & std::size_t(b));                                           \
+  MDBX_CXX01_CONSTEXPR ENUM operator&(unsigned a, ENUM b) {                    \
+    return ENUM(a & unsigned(b));                                              \
   }                                                                            \
   MDBX_CXX14_CONSTEXPR ENUM &operator&=(ENUM &a, ENUM b) { return a = a & b; } \
-  MDBX_CXX14_CONSTEXPR ENUM &operator&=(ENUM &a, size_t b) {                   \
+  MDBX_CXX14_CONSTEXPR ENUM &operator&=(ENUM &a, unsigned b) {                 \
     return a = a & b;                                                          \
   }                                                                            \
-  MDBX_CXX01_CONSTEXPR std::size_t operator~(ENUM a) {                         \
-    return ~std::size_t(a);                                                    \
-  }                                                                            \
+  MDBX_CXX01_CONSTEXPR unsigned operator~(ENUM a) { return ~unsigned(a); }     \
   MDBX_CXX01_CONSTEXPR ENUM operator^(ENUM a, ENUM b) {                        \
-    return ENUM(std::size_t(a) ^ std::size_t(b));                              \
+    return ENUM(unsigned(a) ^ unsigned(b));                                    \
   }                                                                            \
   MDBX_CXX14_CONSTEXPR ENUM &operator^=(ENUM &a, ENUM b) { return a = a ^ b; } \
   }
diff --git a/libs/libmdbx/src/mdbx_chk.c b/libs/libmdbx/src/mdbx_chk.c
index 194bde6f9a..dd505dd96c 100644
--- a/libs/libmdbx/src/mdbx_chk.c
+++ b/libs/libmdbx/src/mdbx_chk.c
@@ -34,7 +34,7 @@
  * top-level directory of the distribution or, alternatively, at
  * <http://www.OpenLDAP.org/license.html>. */
 
-#define MDBX_BUILD_SOURCERY 47492323531afee427a3de6ddaeae26eed45bfd1b52d92fd121a5a13a9747dbb_v0_9_2_0_g092ab09
+#define MDBX_BUILD_SOURCERY b30bc0044d83cd1275fa00662c8265e39091a931353b79a46d21c9536795acb2_v0_9_2_12_g3e7459b4
 #ifdef MDBX_CONFIG_H
 #include MDBX_CONFIG_H
 #endif
@@ -702,6 +702,7 @@ __extern_C key_t ftok(const char *, int);
 #ifndef WIN32_LEAN_AND_MEAN
 #define WIN32_LEAN_AND_MEAN
 #endif
+#include <excpt.h>
 #include <tlhelp32.h>
 #include <windows.h>
 #include <winnt.h>
@@ -736,7 +737,8 @@ static inline void *mdbx_calloc(size_t nelem, size_t size) {
 
 #ifndef mdbx_realloc
 static inline void *mdbx_realloc(void *ptr, size_t bytes) {
-  return LocalReAlloc(ptr, bytes, LMEM_MOVEABLE);
+  return ptr ? LocalReAlloc(ptr, bytes, LMEM_MOVEABLE)
+             : LocalAlloc(LMEM_FIXED, bytes);
 }
 #endif /* mdbx_realloc */
 
diff --git a/libs/libmdbx/src/mdbx_copy.c b/libs/libmdbx/src/mdbx_copy.c
index eb3c49d1d9..cde9923308 100644
--- a/libs/libmdbx/src/mdbx_copy.c
+++ b/libs/libmdbx/src/mdbx_copy.c
@@ -34,7 +34,7 @@
  * top-level directory of the distribution or, alternatively, at
  * <http://www.OpenLDAP.org/license.html>. */
 
-#define MDBX_BUILD_SOURCERY 47492323531afee427a3de6ddaeae26eed45bfd1b52d92fd121a5a13a9747dbb_v0_9_2_0_g092ab09
+#define MDBX_BUILD_SOURCERY b30bc0044d83cd1275fa00662c8265e39091a931353b79a46d21c9536795acb2_v0_9_2_12_g3e7459b4
 #ifdef MDBX_CONFIG_H
 #include MDBX_CONFIG_H
 #endif
@@ -702,6 +702,7 @@ __extern_C key_t ftok(const char *, int);
 #ifndef WIN32_LEAN_AND_MEAN
 #define WIN32_LEAN_AND_MEAN
 #endif
+#include <excpt.h>
 #include <tlhelp32.h>
 #include <windows.h>
 #include <winnt.h>
@@ -736,7 +737,8 @@ static inline void *mdbx_calloc(size_t nelem, size_t size) {
 
 #ifndef mdbx_realloc
 static inline void *mdbx_realloc(void *ptr, size_t bytes) {
-  return LocalReAlloc(ptr, bytes, LMEM_MOVEABLE);
+  return ptr ? LocalReAlloc(ptr, bytes, LMEM_MOVEABLE)
+             : LocalAlloc(LMEM_FIXED, bytes);
 }
 #endif /* mdbx_realloc */
 
diff --git a/libs/libmdbx/src/mdbx_dump.c b/libs/libmdbx/src/mdbx_dump.c
index 96cf69c47a..c51247a121 100644
--- a/libs/libmdbx/src/mdbx_dump.c
+++ b/libs/libmdbx/src/mdbx_dump.c
@@ -34,7 +34,7 @@
  * top-level directory of the distribution or, alternatively, at
  * <http://www.OpenLDAP.org/license.html>. */
 
-#define MDBX_BUILD_SOURCERY 47492323531afee427a3de6ddaeae26eed45bfd1b52d92fd121a5a13a9747dbb_v0_9_2_0_g092ab09
+#define MDBX_BUILD_SOURCERY b30bc0044d83cd1275fa00662c8265e39091a931353b79a46d21c9536795acb2_v0_9_2_12_g3e7459b4
 #ifdef MDBX_CONFIG_H
 #include MDBX_CONFIG_H
 #endif
@@ -702,6 +702,7 @@ __extern_C key_t ftok(const char *, int);
 #ifndef WIN32_LEAN_AND_MEAN
 #define WIN32_LEAN_AND_MEAN
 #endif
+#include <excpt.h>
 #include <tlhelp32.h>
 #include <windows.h>
 #include <winnt.h>
@@ -736,7 +737,8 @@ static inline void *mdbx_calloc(size_t nelem, size_t size) {
 
 #ifndef mdbx_realloc
 static inline void *mdbx_realloc(void *ptr, size_t bytes) {
-  return LocalReAlloc(ptr, bytes, LMEM_MOVEABLE);
+  return ptr ? LocalReAlloc(ptr, bytes, LMEM_MOVEABLE)
+             : LocalAlloc(LMEM_FIXED, bytes);
 }
 #endif /* mdbx_realloc */
 
diff --git a/libs/libmdbx/src/mdbx_load.c b/libs/libmdbx/src/mdbx_load.c
index 3a49a60ec7..d1ac7e9238 100644
--- a/libs/libmdbx/src/mdbx_load.c
+++ b/libs/libmdbx/src/mdbx_load.c
@@ -34,7 +34,7 @@
  * top-level directory of the distribution or, alternatively, at
  * <http://www.OpenLDAP.org/license.html>. */
 
-#define MDBX_BUILD_SOURCERY 47492323531afee427a3de6ddaeae26eed45bfd1b52d92fd121a5a13a9747dbb_v0_9_2_0_g092ab09
+#define MDBX_BUILD_SOURCERY b30bc0044d83cd1275fa00662c8265e39091a931353b79a46d21c9536795acb2_v0_9_2_12_g3e7459b4
 #ifdef MDBX_CONFIG_H
 #include MDBX_CONFIG_H
 #endif
@@ -702,6 +702,7 @@ __extern_C key_t ftok(const char *, int);
 #ifndef WIN32_LEAN_AND_MEAN
 #define WIN32_LEAN_AND_MEAN
 #endif
+#include <excpt.h>
 #include <tlhelp32.h>
 #include <windows.h>
 #include <winnt.h>
@@ -736,7 +737,8 @@ static inline void *mdbx_calloc(size_t nelem, size_t size) {
 
 #ifndef mdbx_realloc
 static inline void *mdbx_realloc(void *ptr, size_t bytes) {
-  return LocalReAlloc(ptr, bytes, LMEM_MOVEABLE);
+  return ptr ? LocalReAlloc(ptr, bytes, LMEM_MOVEABLE)
+             : LocalAlloc(LMEM_FIXED, bytes);
 }
 #endif /* mdbx_realloc */
 
diff --git a/libs/libmdbx/src/mdbx_stat.c b/libs/libmdbx/src/mdbx_stat.c
index ce47bd75fd..aa5d501728 100644
--- a/libs/libmdbx/src/mdbx_stat.c
+++ b/libs/libmdbx/src/mdbx_stat.c
@@ -34,7 +34,7 @@
  * top-level directory of the distribution or, alternatively, at
  * <http://www.OpenLDAP.org/license.html>. */
 
-#define MDBX_BUILD_SOURCERY 47492323531afee427a3de6ddaeae26eed45bfd1b52d92fd121a5a13a9747dbb_v0_9_2_0_g092ab09
+#define MDBX_BUILD_SOURCERY b30bc0044d83cd1275fa00662c8265e39091a931353b79a46d21c9536795acb2_v0_9_2_12_g3e7459b4
 #ifdef MDBX_CONFIG_H
 #include MDBX_CONFIG_H
 #endif
@@ -702,6 +702,7 @@ __extern_C key_t ftok(const char *, int);
 #ifndef WIN32_LEAN_AND_MEAN
 #define WIN32_LEAN_AND_MEAN
 #endif
+#include <excpt.h>
 #include <tlhelp32.h>
 #include <windows.h>
 #include <winnt.h>
@@ -736,7 +737,8 @@ static inline void *mdbx_calloc(size_t nelem, size_t size) {
 
 #ifndef mdbx_realloc
 static inline void *mdbx_realloc(void *ptr, size_t bytes) {
-  return LocalReAlloc(ptr, bytes, LMEM_MOVEABLE);
+  return ptr ? LocalReAlloc(ptr, bytes, LMEM_MOVEABLE)
+             : LocalAlloc(LMEM_FIXED, bytes);
 }
 #endif /* mdbx_realloc */
 
diff --git a/libs/libmdbx/src/ntdll.def b/libs/libmdbx/src/ntdll.def
index e3a6e33c94..f974ea6380 100644
--- a/libs/libmdbx/src/ntdll.def
+++ b/libs/libmdbx/src/ntdll.def
@@ -1242,3 +1242,5 @@ wcsstr
 wcstol
 wcstombs
 wcstoul
+__C_specific_handler
+_except_handler4_common