mdbx: backport - fix pwrite() for WRITE_MAX.

Change-Id: If4924d20c1e267c2d3a190c860b89fc2fda0d517

COPYRIGHT

@@ -1,4 +1,4 @@
-Copyright 2015-2018 Leonid Yuriev <leo@yuriev.ru>.
+Copyright 2015-2019 Leonid Yuriev <leo@yuriev.ru>.
 Copyright 2011-2015 Howard Chu, Symas Corp.
 Copyright 2015,2016 Peter-Service R&D LLC.
 All rights reserved.

Makefile

@@ -86,7 +86,7 @@ check:	all
 	&& ./mdbx_chk -vvn $(TESTDB) && ./mdbx_chk -vvn $(TESTDB)-copy
 
 check-singleprocess:	all
-	rm -f $(TESTDB) $(TESTLOG) && (set -o pipefail; ./mdbx_test --pathname=$(TESTDB) --dont-cleanup-after --hill | tee -a $(TESTLOG) | tail -n 42) \
+	rm -f $(TESTDB) $(TESTLOG) && (set -o pipefail; ./mdbx_test --pathname=$(TESTDB) --dont-cleanup-after --hill --copy | tee -a $(TESTLOG) | tail -n 42) \
 	&& ./mdbx_chk -vvn $(TESTDB) && ./mdbx_chk -vvn $(TESTDB)-copy
 
 check-fault:	all
@@ -188,7 +188,7 @@ ci:
 
 ###############################################################################
 
-CROSS_LIST = alpha-linux-gnu-gcc mips-linux-gnu-gcc \
+CROSS_LIST = mips-linux-gnu-gcc \
 	powerpc64-linux-gnu-gcc powerpc-linux-gnu-gcc \
 	arm-linux-gnueabihf-gcc aarch64-linux-gnu-gcc
 
@@ -197,12 +197,15 @@ CROSS_LIST = alpha-linux-gnu-gcc mips-linux-gnu-gcc \
 # sh4-linux-gnu-gcc		- qemu troubles (pread syscall, etc)
 # mips64-linux-gnuabi64-gcc	- qemu troubles (pread syscall, etc)
 # sparc64-linux-gnu-gcc		- qemu troubles (fcntl for F_SETLK/F_GETLK)
+# alpha-linux-gnu-gcc		- qemu (or gcc) troubles (coredump)
+
 CROSS_LIST_NOQEMU = hppa-linux-gnu-gcc s390x-linux-gnu-gcc \
-	sh4-linux-gnu-gcc mips64-linux-gnuabi64-gcc sparc64-linux-gnu-gcc
+	sh4-linux-gnu-gcc mips64-linux-gnuabi64-gcc \
+	sparc64-linux-gnu-gcc alpha-linux-gnu-gcc
 
 cross-gcc:
 	@echo "CORRESPONDING CROSS-COMPILERs ARE REQUIRED."
-	@echo "FOR INSTANCE: apt install g++-aarch64-linux-gnu g++-alpha-linux-gnu g++-arm-linux-gnueabihf g++-hppa-linux-gnu g++-mips-linux-gnu g++-mips64-linux-gnuabi64 g++-powerpc-linux-gnu g++-powerpc64-linux-gnu g++-s390x-linux-gnu g++-sh4-linux-gnu"
+	@echo "FOR INSTANCE: apt install g++-aarch64-linux-gnu g++-alpha-linux-gnu g++-arm-linux-gnueabihf g++-hppa-linux-gnu g++-mips-linux-gnu g++-mips64-linux-gnuabi64 g++-powerpc-linux-gnu g++-powerpc64-linux-gnu g++-s390x-linux-gnu g++-sh4-linux-gnu g++-sparc64-linux-gnu"
 	@for CC in $(CROSS_LIST_NOQEMU) $(CROSS_LIST); do \
 		echo "===================== $$CC"; \
 		$(MAKE) clean && CC=$$CC CXX=$$(echo $$CC | sed 's/-gcc/-g++/') EXE_LDFLAGS=-static $(MAKE) all || exit $$?; \
@@ -213,8 +216,12 @@ cross-gcc:
 # Therefore it is impossible to run full multi-process tests.
 cross-qemu:
 	@echo "CORRESPONDING CROSS-COMPILERs AND QEMUs ARE REQUIRED."
-	@echo "FOR INSTANCE: apt install binfmt-support qemu-user-static qemu-user qemu-system-arm qemu-system-mips qemu-system-misc qemu-system-ppc qemu-system-sparc g++-aarch64-linux-gnu g++-alpha-linux-gnu g++-arm-linux-gnueabihf g++-hppa-linux-gnu g++-mips-linux-gnu g++-mips64-linux-gnuabi64 g++-powerpc-linux-gnu g++-powerpc64-linux-gnu g++-s390x-linux-gnu g++-sh4-linux-gnu"
+	@echo "FOR INSTANCE: "
+	@echo "	1) apt install g++-aarch64-linux-gnu g++-alpha-linux-gnu g++-arm-linux-gnueabihf g++-hppa-linux-gnu g++-mips-linux-gnu g++-mips64-linux-gnuabi64 g++-powerpc-linux-gnu g++-powerpc64-linux-gnu g++-s390x-linux-gnu g++-sh4-linux-gnu g++-sparc64-linux-gnu"
+	@echo "	2) apt install binfmt-support qemu-user-static qemu-user qemu-system-arm qemu-system-mips qemu-system-misc qemu-system-ppc qemu-system-sparc"
 	@for CC in $(CROSS_LIST); do \
 		echo "===================== $$CC + qemu"; \
-		$(MAKE) clean && CC=$$CC CXX=$$(echo $$CC | sed 's/-gcc/-g++/') EXE_LDFLAGS=-static $(MAKE) check-singleprocess || exit $$?; \
+		$(MAKE) clean && \
+			CC=$$CC CXX=$$(echo $$CC | sed 's/-gcc/-g++/') EXE_LDFLAGS=-static XCFLAGS="-DMDBX_SAFE4QEMU $(XCFLAGS)" \
+			$(MAKE) check-singleprocess || exit $$?; \
 	done

README-RU.md

@@ -12,7 +12,7 @@ and [by Yandex](https://translate.yandex.ru/translate?url=https%3A%2F%2Fgithub.c
 
 ### Project Status
 
-**Сейчас MDBX _активно перерабатывается_** и к середине 2018 ожидается
+**Сейчас MDBX _активно перерабатывается_** предстоит
 большое изменение как API, так и формата базы данных. К сожалению,
 обновление приведет к потере совместимости с предыдущими версиями.
 

mdbx.h

@@ -1,6 +1,6 @@
-/* LICENSE AND COPYRUSTING *****************************************************
+/* LICENSE AND COPYRUSTING *****************************************************
  *
- * Copyright 2015-2018 Leonid Yuriev <leo@yuriev.ru>
+ * Copyright 2015-2019 Leonid Yuriev <leo@yuriev.ru>
  * and other libmdbx authors: please see AUTHORS file.
  * All rights reserved.
  *
@@ -60,8 +60,8 @@
 
 /* IMPENDING CHANGES WARNING ***************************************************
  *
- * MDBX is under active development, database format and API aren't stable
- * at least until 2018Q2. New version won't be backwards compatible. Main focus
+ * MDBX is under active non-public development, database format and API
+ * will be refined. New version won't be backwards compatible. Main focus
  * of the rework is to provide clear and robust API and new features.
  *
  ******************************************************************************/
@@ -610,7 +610,7 @@ LIBMDBX_API int mdbx_env_create(MDBX_env **penv);
  *  - MDBX_NOTLS
  *      Don't use Thread-Local Storage. Tie reader locktable slots to
  *      MDBX_txn objects instead of to threads. I.e. mdbx_txn_reset() keeps
- *      the slot reseved for the MDBX_txn object. A thread may use parallel
+ *      the slot reserved for the MDBX_txn object. A thread may use parallel
  *      read-only transactions. A read-only transaction may span threads if
  *      the user synchronizes its use. Applications that multiplex many
  *      user threads over individual OS threads need this option. Such an
@@ -1601,7 +1601,7 @@ LIBMDBX_API int mdbx_env_set_syncbytes(MDBX_env *env, size_t bytes);
  * [out] percent  Percentage of page allocation in the database.
  *
  * Returns Number of transactions committed after the given was started for
- * read, or -1 on failure. */
+ * read, or negative value on failure. */
 LIBMDBX_API int mdbx_txn_straggler(MDBX_txn *txn, int *percent);
 
 /* A callback function for killing a laggard readers,

src/bits.h

@@ -1,5 +1,5 @@
 /*
- * Copyright 2015-2018 Leonid Yuriev <leo@yuriev.ru>
+ * Copyright 2015-2019 Leonid Yuriev <leo@yuriev.ru>
  * and other libmdbx authors: please see AUTHORS file.
  * All rights reserved.
  *

src/defs.h

@@ -1,5 +1,5 @@
 /*
- * Copyright 2015-2018 Leonid Yuriev <leo@yuriev.ru>
+ * Copyright 2015-2019 Leonid Yuriev <leo@yuriev.ru>
  * and other libmdbx authors: please see AUTHORS file.
  * All rights reserved.
  *

src/lck-posix.c

@@ -1,5 +1,5 @@
-/*
- * Copyright 2015-2018 Leonid Yuriev <leo@yuriev.ru>
+/*
+ * Copyright 2015-2019 Leonid Yuriev <leo@yuriev.ru>
  * and other libmdbx authors: please see AUTHORS file.
  * All rights reserved.
  *
@@ -20,8 +20,8 @@
 #ifndef MDBX_USE_ROBUST
 /* Howard Chu: Android currently lacks Robust Mutex support */
 #if defined(EOWNERDEAD) &&                                                     \
-    !defined(ANDROID) /* LY: glibc before 2.10 has a troubles with Robust      \
-                         Mutex too. */                                         \
+    !defined(__ANDROID__) /* LY: glibc before 2.10 has a troubles              \
+                                 with Robust Mutex too. */                     \
     && __GLIBC_PREREQ(2, 10)
 #define MDBX_USE_ROBUST 1
 #else
@@ -149,7 +149,7 @@ int __cold mdbx_lck_init(MDBX_env *env) {
     goto bailout;
 #endif /* MDBX_USE_ROBUST */
 
-#if _POSIX_C_SOURCE >= 199506L
+#if _POSIX_C_SOURCE >= 199506L && !defined(MDBX_SAFE4QEMU)
   rc = pthread_mutexattr_setprotocol(&ma, PTHREAD_PRIO_INHERIT);
   if (rc == ENOTSUP)
     rc = pthread_mutexattr_setprotocol(&ma, PTHREAD_PRIO_NONE);

src/lck-windows.c

@@ -1,5 +1,5 @@
 /*
- * Copyright 2015-2018 Leonid Yuriev <leo@yuriev.ru>
+ * Copyright 2015-2019 Leonid Yuriev <leo@yuriev.ru>
  * and other libmdbx authors: please see AUTHORS file.
  * All rights reserved.
  *
@@ -663,6 +663,7 @@ MDBX_srwlock_function mdbx_srwlock_Init, mdbx_srwlock_AcquireShared,
 MDBX_GetFileInformationByHandleEx mdbx_GetFileInformationByHandleEx;
 MDBX_GetVolumeInformationByHandleW mdbx_GetVolumeInformationByHandleW;
 MDBX_GetFinalPathNameByHandleW mdbx_GetFinalPathNameByHandleW;
+MDBX_SetFileInformationByHandle mdbx_SetFileInformationByHandle;
 MDBX_NtFsControlFile mdbx_NtFsControlFile;
 
 static void mdbx_winnt_import(void) {
@@ -699,6 +700,10 @@ static void mdbx_winnt_import(void) {
       (MDBX_GetFinalPathNameByHandleW)GetProcAddress(
           hKernel32dll, "GetFinalPathNameByHandleW");
 
+  mdbx_SetFileInformationByHandle =
+      (MDBX_SetFileInformationByHandle)GetProcAddress(
+          hKernel32dll, "SetFileInformationByHandle");
+
   const HINSTANCE hNtdll = GetModuleHandleA("ntdll.dll");
   mdbx_NtFsControlFile =
       (MDBX_NtFsControlFile)GetProcAddress(hNtdll, "NtFsControlFile");

src/mdbx.c

@@ -1,5 +1,5 @@
-/*
- * Copyright 2015-2018 Leonid Yuriev <leo@yuriev.ru>
+/*
+ * Copyright 2015-2019 Leonid Yuriev <leo@yuriev.ru>
  * and other libmdbx authors: please see AUTHORS file.
  * All rights reserved.
  *
@@ -3755,6 +3755,7 @@ static int mdbx_prep_backlog(MDBX_txn *txn, MDBX_cursor *mc) {
   const int extra = mdbx_backlog_extragap(txn->mt_env);
 
   if (mdbx_backlog_size(txn) < mc->mc_db->md_depth + extra) {
+    mc->mc_flags &= ~C_RECLAIMING;
     int rc = mdbx_cursor_touch(mc);
     if (unlikely(rc))
       return rc;
@@ -3768,6 +3769,7 @@ static int mdbx_prep_backlog(MDBX_txn *txn, MDBX_cursor *mc) {
         break;
       }
     }
+    mc->mc_flags |= C_RECLAIMING;
   }
 
   return MDBX_SUCCESS;
@@ -3880,6 +3882,7 @@ static int mdbx_update_gc(MDBX_txn *txn) {
   if (unlikely(rc != MDBX_SUCCESS))
     goto bailout_notracking;
 
+  mc.mc_flags |= C_RECLAIMING;
   mc.mc_next = txn->mt_cursors[FREE_DBI];
   txn->mt_cursors[FREE_DBI] = &mc;
 
@@ -3925,9 +3928,7 @@ retry:
           mdbx_tassert(txn, cleaned_gc_id < *env->me_oldest);
           mdbx_trace("%s.cleanup-reclaimed-id [%u]%" PRIaTXN, dbg_prefix_mode,
                      cleaned_gc_slot, cleaned_gc_id);
-          mc.mc_flags |= C_RECLAIMING;
           rc = mdbx_cursor_del(&mc, 0);
-          mc.mc_flags ^= C_RECLAIMING;
           if (unlikely(rc != MDBX_SUCCESS))
             goto bailout;
         } while (cleaned_gc_slot < MDBX_PNL_SIZE(txn->mt_lifo_reclaimed));
@@ -3949,9 +3950,7 @@ retry:
         mdbx_tassert(txn, cleaned_gc_id < *env->me_oldest);
         mdbx_trace("%s.cleanup-reclaimed-id %" PRIaTXN, dbg_prefix_mode,
                    cleaned_gc_id);
-        mc.mc_flags |= C_RECLAIMING;
         rc = mdbx_cursor_del(&mc, 0);
-        mc.mc_flags ^= C_RECLAIMING;
         if (unlikely(rc != MDBX_SUCCESS))
           goto bailout;
         settled = 0;
@@ -4104,7 +4103,9 @@ retry:
     if (befree_stored < MDBX_PNL_SIZE(txn->mt_befree_pages)) {
       if (unlikely(!befree_stored)) {
         /* Make sure last page of freeDB is touched and on befree-list */
+        mc.mc_flags &= ~C_RECLAIMING;
         rc = mdbx_page_search(&mc, NULL, MDBX_PS_LAST | MDBX_PS_MODIFY);
+        mc.mc_flags |= C_RECLAIMING;
         if (unlikely(rc != MDBX_SUCCESS && rc != MDBX_NOTFOUND))
           goto bailout;
       }
@@ -4198,7 +4199,9 @@ retry:
                   reused_gc_slot) *
                      env->me_maxgc_ov1page) {
         /* LY: need just a txn-id for save page list. */
+        mc.mc_flags &= ~C_RECLAIMING;
         rc = mdbx_page_alloc(&mc, 0, NULL, MDBX_ALLOC_GC | MDBX_ALLOC_KICK);
+        mc.mc_flags |= C_RECLAIMING;
         if (likely(rc == MDBX_SUCCESS)) {
           /* LY: ok, reclaimed from freedb. */
           mdbx_trace("%s: took @%" PRIaTXN " from GC, continue",
@@ -4412,7 +4415,7 @@ retry:
       key.iov_len = sizeof(fill_gc_id);
 
       mdbx_tassert(txn, data.iov_len >= sizeof(pgno_t) * 2);
-      mc.mc_flags |= C_RECLAIMING | C_GCFREEZE;
+      mc.mc_flags |= C_GCFREEZE;
       unsigned chunk = (unsigned)(data.iov_len / sizeof(pgno_t)) - 1;
       if (unlikely(chunk > left)) {
         mdbx_trace("%s: chunk %u > left %u, @%" PRIaTXN, dbg_prefix_mode, chunk,
@@ -4420,12 +4423,12 @@ retry:
         if (loop < 5 || chunk - left > env->me_maxgc_ov1page) {
           data.iov_len = (left + 1) * sizeof(pgno_t);
           if (loop < 21)
-            mc.mc_flags -= C_GCFREEZE;
+            mc.mc_flags &= ~C_GCFREEZE;
         }
         chunk = left;
       }
       rc = mdbx_cursor_put(&mc, &key, &data, MDBX_CURRENT | MDBX_RESERVE);
-      mc.mc_flags &= ~(C_RECLAIMING | C_GCFREEZE);
+      mc.mc_flags &= ~C_GCFREEZE;
       if (unlikely(rc != MDBX_SUCCESS))
         goto bailout;
 
@@ -5127,7 +5130,7 @@ static int __cold mdbx_read_header(MDBX_env *env, MDBX_meta *meta,
 
     /* LY: check and silently put mm_geo.now into [geo.lower...geo.upper].
      *
-     * Copy-with-compaction by previous version of libmfbx could produce DB-file
+     * Copy-with-compaction by previous version of libmdbx could produce DB-file
      * less than meta.geo.lower bound, in case actual filling is low or no data
      * at all. This is not a problem as there is no damage or loss of data.
      * Therefore it is better not to consider such situation as an error, but
@@ -5496,7 +5499,7 @@ fail:
 
 int __cold mdbx_env_get_maxkeysize(MDBX_env *env) {
   if (!env || env->me_signature != MDBX_ME_SIGNATURE || !env->me_maxkey_limit)
-    return -MDBX_EINVAL;
+    return (MDBX_EINVAL > 0) ? -MDBX_EINVAL : MDBX_EINVAL;
   return env->me_maxkey_limit;
 }
 
@@ -7195,13 +7198,13 @@ static int mdbx_page_search(MDBX_cursor *mc, MDBX_val *key, int flags) {
       return rc;
     rc = mdbx_page_search(&mc2, &mc->mc_dbx->md_name, 0);
     if (unlikely(rc != MDBX_SUCCESS))
-      return rc;
+      return (rc == MDBX_NOTFOUND) ? MDBX_BAD_DBI : rc;
     {
       MDBX_val data;
       int exact = 0;
       MDBX_node *leaf = mdbx_node_search(&mc2, &mc->mc_dbx->md_name, &exact);
       if (!exact)
-        return MDBX_NOTFOUND;
+        return MDBX_BAD_DBI;
       if (unlikely((leaf->mn_flags & (F_DUPDATA | F_SUBDATA)) != F_SUBDATA))
         return MDBX_INCOMPATIBLE; /* not a named DB */
       rc = mdbx_node_read(&mc2, leaf, &data);
@@ -8300,7 +8303,7 @@ int mdbx_cursor_put(MDBX_cursor *mc, MDBX_val *key, MDBX_val *data,
         if (rc > 0) {
           rc = MDBX_NOTFOUND;
           mc->mc_ki[mc->mc_top]++;
-        } else {
+        } else if (unlikely(rc < 0 || (flags & MDBX_APPENDDUP) == 0)) {
           /* new key is <= last key */
           rc = MDBX_EKEYMISMATCH;
         }
@@ -10882,7 +10885,7 @@ static int mdbx_page_split(MDBX_cursor *mc, const MDBX_val *newkey,
        * This yields better packing during sequential inserts.
        */
       int dir;
-      if (nkeys < 20 || nsize > pmax / 16 || newindx >= nkeys) {
+      if (nkeys < 32 || nsize > pmax / 16 || newindx >= nkeys) {
         /* Find split point */
         psize = 0;
         if (newindx <= split_indx || newindx >= nkeys) {
@@ -12466,7 +12469,7 @@ int __cold mdbx_reader_list(MDBX_env *env, MDBX_msg_func *func, void *ctx) {
   int rc = 0, first = 1;
 
   if (unlikely(!env || !func))
-    return -MDBX_EINVAL;
+    return (MDBX_EINVAL > 0) ? -MDBX_EINVAL : MDBX_EINVAL;
 
   if (unlikely(env->me_signature != MDBX_ME_SIGNATURE))
     return MDBX_EBADSIGN;
@@ -12796,7 +12799,7 @@ __attribute__((no_sanitize_thread, noinline))
 int mdbx_txn_straggler(MDBX_txn *txn, int *percent)
 {
   if (unlikely(!txn))
-    return -MDBX_EINVAL;
+    return (MDBX_EINVAL > 0) ? -MDBX_EINVAL : MDBX_EINVAL;
 
   if (unlikely(txn->mt_signature != MDBX_MT_SIGNATURE))
     return MDBX_EBADSIGN;
@@ -12810,7 +12813,7 @@ int mdbx_txn_straggler(MDBX_txn *txn, int *percent)
       *percent =
           (int)((txn->mt_next_pgno * UINT64_C(100) + txn->mt_end_pgno / 2) /
                 txn->mt_end_pgno);
-    return -1;
+    return 0;
   }
 
   txnid_t recent;
@@ -13515,7 +13518,7 @@ __cold intptr_t mdbx_limits_keysize_max(intptr_t pagesize) {
   else if (unlikely(pagesize < (intptr_t)MIN_PAGESIZE ||
                     pagesize > (intptr_t)MAX_PAGESIZE ||
                     !mdbx_is_power2((size_t)pagesize)))
-    return -MDBX_EINVAL;
+    return (MDBX_EINVAL > 0) ? -MDBX_EINVAL : MDBX_EINVAL;
 
   return mdbx_maxkey(mdbx_nodemax(pagesize));
 }
@@ -13530,7 +13533,7 @@ __cold intptr_t mdbx_limits_dbsize_min(intptr_t pagesize) {
   else if (unlikely(pagesize < (intptr_t)MIN_PAGESIZE ||
                     pagesize > (intptr_t)MAX_PAGESIZE ||
                     !mdbx_is_power2((size_t)pagesize)))
-    return -MDBX_EINVAL;
+    return (MDBX_EINVAL > 0) ? -MDBX_EINVAL : MDBX_EINVAL;
 
   return MIN_PAGENO * pagesize;
 }
@@ -13541,7 +13544,7 @@ __cold intptr_t mdbx_limits_dbsize_max(intptr_t pagesize) {
   else if (unlikely(pagesize < (intptr_t)MIN_PAGESIZE ||
                     pagesize > (intptr_t)MAX_PAGESIZE ||
                     !mdbx_is_power2((size_t)pagesize)))
-    return -MDBX_EINVAL;
+    return (MDBX_EINVAL > 0) ? -MDBX_EINVAL : MDBX_EINVAL;
 
   const uint64_t limit = MAX_PAGENO * (uint64_t)pagesize;
   return (limit < (intptr_t)MAX_MAPSIZE) ? (intptr_t)limit
@@ -13554,7 +13557,7 @@ __cold intptr_t mdbx_limits_txnsize_max(intptr_t pagesize) {
   else if (unlikely(pagesize < (intptr_t)MIN_PAGESIZE ||
                     pagesize > (intptr_t)MAX_PAGESIZE ||
                     !mdbx_is_power2((size_t)pagesize)))
-    return -MDBX_EINVAL;
+    return (MDBX_EINVAL > 0) ? -MDBX_EINVAL : MDBX_EINVAL;
 
   return pagesize * (MDBX_DPL_TXNFULL - 1);
 }

src/osal.c

@@ -1,7 +1,7 @@
 /* https://en.wikipedia.org/wiki/Operating_system_abstraction_layer */
 
 /*
- * Copyright 2015-2018 Leonid Yuriev <leo@yuriev.ru>
+ * Copyright 2015-2019 Leonid Yuriev <leo@yuriev.ru>
  * and other libmdbx authors: please see AUTHORS file.
  * All rights reserved.
  *
@@ -581,17 +581,25 @@ int mdbx_pwrite(mdbx_filehandle_t fd, const void *buf, size_t bytes,
     return (bytes == written) ? MDBX_SUCCESS : MDBX_EIO /* ERROR_WRITE_FAULT */;
   return GetLastError();
 #else
-  int rc;
-  intptr_t written;
-  do {
+  while (true) {
     STATIC_ASSERT_MSG(sizeof(off_t) >= sizeof(size_t),
                       "libmdbx requires 64-bit file I/O on 64-bit systems");
-    written = pwrite(fd, buf, bytes, offset);
+    const intptr_t written =
+        pwrite(fd, buf, (bytes <= MAX_WRITE) ? bytes : MAX_WRITE, offset);
     if (likely(bytes == (size_t)written))
       return MDBX_SUCCESS;
-    rc = errno;
-  } while (rc == EINTR);
-  return (written < 0) ? rc : MDBX_EIO /* Use which error code (ENOSPC)? */;
+    if (written < 0) {
+      const int rc = errno;
+      if (rc != EINTR)
+        return rc;
+    } else if (written > 0) {
+      bytes -= written;
+      offset += written;
+      buf = (char *)buf + written;
+    } else {
+      return -1;
+    }
+  }
 #endif
 }
 
@@ -741,11 +749,21 @@ int mdbx_filesize(mdbx_filehandle_t fd, uint64_t *length) {
 
 int mdbx_ftruncate(mdbx_filehandle_t fd, uint64_t length) {
 #if defined(_WIN32) || defined(_WIN64)
-  LARGE_INTEGER li;
-  li.QuadPart = length;
-  return (SetFilePointerEx(fd, li, NULL, FILE_BEGIN) && SetEndOfFile(fd))
-             ? MDBX_SUCCESS
-             : GetLastError();
+  if (mdbx_SetFileInformationByHandle) {
+    FILE_END_OF_FILE_INFO EndOfFileInfo;
+    EndOfFileInfo.EndOfFile.QuadPart = length;
+    return mdbx_SetFileInformationByHandle(fd, FileEndOfFileInfo,
+                                           &EndOfFileInfo,
+                                           sizeof(FILE_END_OF_FILE_INFO))
+               ? MDBX_SUCCESS
+               : GetLastError();
+  } else {
+    LARGE_INTEGER li;
+    li.QuadPart = length;
+    return (SetFilePointerEx(fd, li, NULL, FILE_BEGIN) && SetEndOfFile(fd))
+               ? MDBX_SUCCESS
+               : GetLastError();
+  }
 #else
   STATIC_ASSERT_MSG(sizeof(off_t) >= sizeof(size_t),
                     "libmdbx requires 64-bit file I/O on 64-bit systems");

src/osal.h

@@ -1,7 +1,7 @@
 /* https://en.wikipedia.org/wiki/Operating_system_abstraction_layer */
 
 /*
- * Copyright 2015-2018 Leonid Yuriev <leo@yuriev.ru>
+ * Copyright 2015-2019 Leonid Yuriev <leo@yuriev.ru>
  * and other libmdbx authors: please see AUTHORS file.
  * All rights reserved.
  *
@@ -627,6 +627,12 @@ typedef DWORD(WINAPI *MDBX_GetFinalPathNameByHandleW)(_In_ HANDLE hFile,
                                                       _In_ DWORD dwFlags);
 extern MDBX_GetFinalPathNameByHandleW mdbx_GetFinalPathNameByHandleW;
 
+typedef BOOL(WINAPI *MDBX_SetFileInformationByHandle)(
+    _In_ HANDLE hFile, _In_ FILE_INFO_BY_HANDLE_CLASS FileInformationClass,
+    _Out_ LPVOID lpFileInformation, _In_ DWORD dwBufferSize);
+
+extern MDBX_SetFileInformationByHandle mdbx_SetFileInformationByHandle;
+
 typedef NTSTATUS(NTAPI *MDBX_NtFsControlFile)(
     IN HANDLE FileHandle, IN OUT HANDLE Event,
     IN OUT PVOID /* PIO_APC_ROUTINE */ ApcRoutine, IN OUT PVOID ApcContext,

src/tools/mdbx_chk.c

@@ -1,7 +1,7 @@
 /* mdbx_chk.c - memory-mapped database check tool */
 
 /*
- * Copyright 2015-2018 Leonid Yuriev <leo@yuriev.ru>
+ * Copyright 2015-2019 Leonid Yuriev <leo@yuriev.ru>
  * and other libmdbx authors: please see AUTHORS file.
  * All rights reserved.
  *

src/tools/mdbx_copy.1

@@ -1,4 +1,4 @@
-.\" Copyright 2015-2018 Leonid Yuriev <leo@yuriev.ru>.
+.\" Copyright 2015-2019 Leonid Yuriev <leo@yuriev.ru>.
 .\" Copyright 2012-2015 Howard Chu, Symas Corp. All Rights Reserved.
 .\" Copyright 2015,2016 Peter-Service R&D LLC <http://billing.ru/>.
 .\" Copying restrictions apply.  See COPYRIGHT/LICENSE.

src/tools/mdbx_copy.c

@@ -1,7 +1,7 @@
 /* mdbx_copy.c - memory-mapped database backup tool */
 
 /*
- * Copyright 2015-2018 Leonid Yuriev <leo@yuriev.ru>
+ * Copyright 2015-2019 Leonid Yuriev <leo@yuriev.ru>
  * and other libmdbx authors: please see AUTHORS file.
  * All rights reserved.
  *

src/tools/mdbx_dump.1

@@ -1,4 +1,4 @@
-.\" Copyright 2015-2018 Leonid Yuriev <leo@yuriev.ru>.
+.\" Copyright 2015-2019 Leonid Yuriev <leo@yuriev.ru>.
 .\" Copyright 2014-2015 Howard Chu, Symas Corp. All Rights Reserved.
 .\" Copyright 2015,2016 Peter-Service R&D LLC <http://billing.ru/>.
 .\" Copying restrictions apply.  See COPYRIGHT/LICENSE.

src/tools/mdbx_dump.c

@@ -1,7 +1,7 @@
 /* mdbx_dump.c - memory-mapped database dump tool */
 
 /*
- * Copyright 2015-2018 Leonid Yuriev <leo@yuriev.ru>
+ * Copyright 2015-2019 Leonid Yuriev <leo@yuriev.ru>
  * and other libmdbx authors: please see AUTHORS file.
  * All rights reserved.
  *

src/tools/mdbx_load.1

@@ -1,4 +1,4 @@
-.\" Copyright 2015-2018 Leonid Yuriev <leo@yuriev.ru>.
+.\" Copyright 2015-2019 Leonid Yuriev <leo@yuriev.ru>.
 .\" Copyright 2014-2015 Howard Chu, Symas Corp. All Rights Reserved.
 .\" Copyright 2015,2016 Peter-Service R&D LLC <http://billing.ru/>.
 .\" Copying restrictions apply.  See COPYRIGHT/LICENSE.

src/tools/mdbx_load.c

@@ -1,7 +1,7 @@
 /* mdbx_load.c - memory-mapped database load tool */
 
 /*
- * Copyright 2015-2018 Leonid Yuriev <leo@yuriev.ru>
+ * Copyright 2015-2019 Leonid Yuriev <leo@yuriev.ru>
  * and other libmdbx authors: please see AUTHORS file.
  * All rights reserved.
  *

src/tools/mdbx_stat.1

@@ -1,4 +1,4 @@
-.\" Copyright 2015-2018 Leonid Yuriev <leo@yuriev.ru>.
+.\" Copyright 2015-2019 Leonid Yuriev <leo@yuriev.ru>.
 .\" Copyright 2012-2015 Howard Chu, Symas Corp. All Rights Reserved.
 .\" Copyright 2015,2016 Peter-Service R&D LLC <http://billing.ru/>.
 .\" Copying restrictions apply.  See COPYRIGHT/LICENSE.

src/tools/mdbx_stat.c

@@ -1,7 +1,7 @@
 /* mdbx_stat.c - memory-mapped database status tool */
 
 /*
- * Copyright 2015-2018 Leonid Yuriev <leo@yuriev.ru>
+ * Copyright 2015-2019 Leonid Yuriev <leo@yuriev.ru>
  * and other libmdbx authors: please see AUTHORS file.
  * All rights reserved.
  *

src/version.c

@@ -1,5 +1,5 @@
 /*
- * Copyright 2015-2018 Leonid Yuriev <leo@yuriev.ru>
+ * Copyright 2015-2019 Leonid Yuriev <leo@yuriev.ru>
  * and other libmdbx authors: please see AUTHORS file.
  * All rights reserved.
  *
@@ -18,8 +18,8 @@
 #error "API version mismatch!"
 #endif
 
-#define MDBX_VERSION_RELEASE 0
-#define MDBX_VERSION_REVISION 2
+#define MDBX_VERSION_RELEASE 2
+#define MDBX_VERSION_REVISION 0
 
 /*LIBMDBX_EXPORTS*/ const mdbx_version_info mdbx_version = {
     MDBX_VERSION_MAJOR,
@@ -30,5 +30,5 @@
      "@MDBX_GIT_DESCRIBE@"}};
 
 /*LIBMDBX_EXPORTS*/ const mdbx_build_info mdbx_build = {
-    "@MDBX_BUILD_TIMESTAMP@", "@MDBX_BUILD_TAGRET@", "@MDBX_BUILD_OPTIONS@",
+    "@MDBX_BUILD_TIMESTAMP@", "@MDBX_BUILD_TARGET@", "@MDBX_BUILD_OPTIONS@",
     "@MDBX_BUILD_COMPILER@", "@MDBX_BUILD_FLAGS@"};

test/base.h

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2018 Leonid Yuriev <leo@yuriev.ru>
+ * Copyright 2017-2019 Leonid Yuriev <leo@yuriev.ru>
  * and other libmdbx authors: please see AUTHORS file.
  * All rights reserved.
  *

test/cases.cc

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2018 Leonid Yuriev <leo@yuriev.ru>
+ * Copyright 2017-2019 Leonid Yuriev <leo@yuriev.ru>
  * and other libmdbx authors: please see AUTHORS file.
  * All rights reserved.
  *

test/chrono.cc

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2018 Leonid Yuriev <leo@yuriev.ru>
+ * Copyright 2017-2019 Leonid Yuriev <leo@yuriev.ru>
  * and other libmdbx authors: please see AUTHORS file.
  * All rights reserved.
  *

test/chrono.h

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2018 Leonid Yuriev <leo@yuriev.ru>
+ * Copyright 2017-2019 Leonid Yuriev <leo@yuriev.ru>
  * and other libmdbx authors: please see AUTHORS file.
  * All rights reserved.
  *

test/config.cc

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2018 Leonid Yuriev <leo@yuriev.ru>
+ * Copyright 2017-2019 Leonid Yuriev <leo@yuriev.ru>
  * and other libmdbx authors: please see AUTHORS file.
  * All rights reserved.
  *

test/config.h

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2018 Leonid Yuriev <leo@yuriev.ru>
+ * Copyright 2017-2019 Leonid Yuriev <leo@yuriev.ru>
  * and other libmdbx authors: please see AUTHORS file.
  * All rights reserved.
  *

test/dead.cc

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2018 Leonid Yuriev <leo@yuriev.ru>
+ * Copyright 2017-2019 Leonid Yuriev <leo@yuriev.ru>
  * and other libmdbx authors: please see AUTHORS file.
  * All rights reserved.
  *

test/hill.cc

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2018 Leonid Yuriev <leo@yuriev.ru>
+ * Copyright 2017-2019 Leonid Yuriev <leo@yuriev.ru>
  * and other libmdbx authors: please see AUTHORS file.
  * All rights reserved.
  *

test/jitter.cc

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2018 Leonid Yuriev <leo@yuriev.ru>
+ * Copyright 2017-2019 Leonid Yuriev <leo@yuriev.ru>
  * and other libmdbx authors: please see AUTHORS file.
  * All rights reserved.
  *

test/keygen.cc

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2018 Leonid Yuriev <leo@yuriev.ru>
+ * Copyright 2017-2019 Leonid Yuriev <leo@yuriev.ru>
  * and other libmdbx authors: please see AUTHORS file.
  * All rights reserved.
  *

test/keygen.h

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2018 Leonid Yuriev <leo@yuriev.ru>
+ * Copyright 2017-2019 Leonid Yuriev <leo@yuriev.ru>
  * and other libmdbx authors: please see AUTHORS file.
  * All rights reserved.
  *

test/log.cc

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2018 Leonid Yuriev <leo@yuriev.ru>
+ * Copyright 2017-2019 Leonid Yuriev <leo@yuriev.ru>
  * and other libmdbx authors: please see AUTHORS file.
  * All rights reserved.
  *

test/log.h

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2018 Leonid Yuriev <leo@yuriev.ru>
+ * Copyright 2017-2019 Leonid Yuriev <leo@yuriev.ru>
  * and other libmdbx authors: please see AUTHORS file.
  * All rights reserved.
  *

test/main.cc

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2018 Leonid Yuriev <leo@yuriev.ru>
+ * Copyright 2017-2019 Leonid Yuriev <leo@yuriev.ru>
  * and other libmdbx authors: please see AUTHORS file.
  * All rights reserved.
  *
@@ -182,11 +182,11 @@ int main(int argc, char *const argv[]) {
                              mdbx_limits_dbsize_min(params.pagesize),
                              mdbx_limits_dbsize_max(params.pagesize)))
       continue;
-    if (config::parse_option(argc, argv, narg, "size", params.size_now,
+    if (config::parse_option(argc, argv, narg, "size-upper", params.size_upper,
                              mdbx_limits_dbsize_min(params.pagesize),
                              mdbx_limits_dbsize_max(params.pagesize)))
       continue;
-    if (config::parse_option(argc, argv, narg, "size-upper", params.size_upper,
+    if (config::parse_option(argc, argv, narg, "size", params.size_now,
                              mdbx_limits_dbsize_min(params.pagesize),
                              mdbx_limits_dbsize_max(params.pagesize)))
       continue;
@@ -376,6 +376,10 @@ int main(int argc, char *const argv[]) {
   if (global::config::cleanup_before)
     cleanup();
 
+  log_trace(">> probe entropy_ticks()");
+  entropy_ticks();
+  log_trace("<< probe entropy_ticks()");
+
   if (global::actors.size() == 1) {
     logging::setup("main");
     global::singlemode = true;

test/osal-unix.cc

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2018 Leonid Yuriev <leo@yuriev.ru>
+ * Copyright 2017-2019 Leonid Yuriev <leo@yuriev.ru>
  * and other libmdbx authors: please see AUTHORS file.
  * All rights reserved.
  *

test/osal-windows.cc

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2018 Leonid Yuriev <leo@yuriev.ru>
+ * Copyright 2017-2019 Leonid Yuriev <leo@yuriev.ru>
  * and other libmdbx authors: please see AUTHORS file.
  * All rights reserved.
  *

test/osal.h

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2018 Leonid Yuriev <leo@yuriev.ru>
+ * Copyright 2017-2019 Leonid Yuriev <leo@yuriev.ru>
  * and other libmdbx authors: please see AUTHORS file.
  * All rights reserved.
  *

test/test.cc

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2018 Leonid Yuriev <leo@yuriev.ru>
+ * Copyright 2017-2019 Leonid Yuriev <leo@yuriev.ru>
  * and other libmdbx authors: please see AUTHORS file.
  * All rights reserved.
  *

test/test.h

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2018 Leonid Yuriev <leo@yuriev.ru>
+ * Copyright 2017-2019 Leonid Yuriev <leo@yuriev.ru>
  * and other libmdbx authors: please see AUTHORS file.
  * All rights reserved.
  *

test/utils.cc

@@ -1,5 +1,5 @@
-/*
- * Copyright 2017-2018 Leonid Yuriev <leo@yuriev.ru>
+/*
+ * Copyright 2017-2019 Leonid Yuriev <leo@yuriev.ru>
  * and other libmdbx authors: please see AUTHORS file.
  * All rights reserved.
  *
@@ -186,14 +186,39 @@ uint64_t entropy_ticks(void) {
   ticks |= low & /* zeroes if high part has changed */
            ~(high_before - high_after);
 #endif
-#elif defined(__aarch64__) || (defined(__ARM_ARCH) && __ARM_ARCH > 7)
+#elif (defined(__aarch64__) || (defined(__ARM_ARCH) && __ARM_ARCH > 7)) &&     \
+    !defined(MDBX_SAFE4QEMU)
   uint64_t virtual_timer;
   __asm __volatile("mrs %0, cntvct_el0" : "=r"(virtual_timer));
   return virtual_timer;
-#elif defined(__ARM_ARCH) && __ARM_ARCH > 5 && __ARM_ARCH < 8
-  unsigned long pmccntr;
-  __asm __volatile("mrc p15, 0, %0, c9, c13, 0" : "=r"(pmccntr));
-  return pmccntr;
+#elif (defined(__ARM_ARCH) && __ARM_ARCH > 5 && __ARM_ARCH < 8) ||             \
+    defined(_M_ARM)
+  static uint32_t pmcntenset = 0x00425B00;
+  if (unlikely(pmcntenset == 0x00425B00)) {
+    uint32_t pmuseren;
+#ifdef _M_ARM
+    pmuseren = _MoveFromCoprocessor(15, 0, 9, 14, 0);
+#else
+    __asm("mrc p15, 0, %0, c9, c14, 0" : "=r"(pmuseren));
+#endif
+    if (1 & pmuseren /* Is it allowed for user mode code? */) {
+#ifdef _M_ARM
+      pmcntenset = _MoveFromCoprocessor(15, 0, 9, 12, 1);
+#else
+      __asm("mrc p15, 0, %0, c9, c12, 1" : "=r"(pmcntenset));
+#endif
+    } else
+      pmcntenset = 0;
+  }
+  if (pmcntenset & 0x80000000ul /* Is it counting? */) {
+#ifdef _M_ARM
+    return __rdpmccntr64();
+#else
+    uint32_t pmccntr;
+    __asm __volatile("mrc p15, 0, %0, c9, c13, 0" : "=r"(pmccntr));
+    return pmccntr;
+#endif
+  }
 #elif defined(__mips__) || defined(__mips) || defined(_R4000)
   unsigned count;
   __asm __volatile("rdhwr %0, $2" : "=r"(count));
@@ -203,8 +228,6 @@ uint64_t entropy_ticks(void) {
 
 #if defined(__e2k__) || defined(__ia32__)
   return __rdtsc();
-#elif defined(_M_ARM)
-  return __rdpmccntr64();
 #elif defined(_WIN32) || defined(_WIN64) || defined(_WINDOWS)
   LARGE_INTEGER PerformanceCount;
   if (QueryPerformanceCounter(&PerformanceCount))
@@ -213,13 +236,13 @@ uint64_t entropy_ticks(void) {
 #else
   struct timespec ts;
 #if defined(CLOCK_MONOTONIC_COARSE)
-  clockid_t clock = CLOCK_MONOTONIC_COARSE;
+  clockid_t clk_id = CLOCK_MONOTONIC_COARSE;
 #elif defined(CLOCK_MONOTONIC_RAW)
-  clockid_t clock = CLOCK_MONOTONIC_RAW;
+  clockid_t clk_id = CLOCK_MONOTONIC_RAW;
 #else
-  clockid_t clock = CLOCK_MONOTONIC;
+  clockid_t clk_id = CLOCK_MONOTONIC;
 #endif
-  int rc = clock_gettime(clock, &ts);
+  int rc = clock_gettime(clk_id, &ts);
   if (unlikely(rc))
     failure_perror("clock_gettime()", rc);
 

test/utils.h

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2018 Leonid Yuriev <leo@yuriev.ru>
+ * Copyright 2017-2019 Leonid Yuriev <leo@yuriev.ru>
  * and other libmdbx authors: please see AUTHORS file.
  * All rights reserved.
  *

tutorial/sample-bdb.txt

@@ -4,7 +4,7 @@
  */
 
 /*
- * Copyright 2015-2018 Leonid Yuriev <leo@yuriev.ru>.
+ * Copyright 2015-2019 Leonid Yuriev <leo@yuriev.ru>.
  * Copyright 2012-2015 Howard Chu, Symas Corp.
  * Copyright 2015,2016 Peter-Service R&D LLC.
  * All rights reserved.

tutorial/sample-mdbx.c

@@ -5,7 +5,7 @@
 
 /*
  * Copyright 2017 Ilya Shipitsin <chipitsine@gmail.com>.
- * Copyright 2015-2018 Leonid Yuriev <leo@yuriev.ru>.
+ * Copyright 2015-2019 Leonid Yuriev <leo@yuriev.ru>.
  * Copyright 2012-2015 Howard Chu, Symas Corp.
  * All rights reserved.
  *