Have the vdbe layer call sqlite3BtreeEnter() on all b-trees in use from within sqlite3VdbeExec() even in SQLITE_THREADSAFE=0 builds. This ensures that BtShared.db is set correctly.

FossilOrigin-Name: d0214602d44d6b84b7463d530720e2560aee6edf

manifest

@@ -1,5 +1,5 @@
-C Add\sthe\s"sqlite3\s-sourceid"\scommand\sin\sthe\sTCL\sinterface.\s\sUse\sthat\scommand\sand\nothers\sto\soutput\sadditional\sinformation\sabout\sthe\stest\sconfiguration\sat\sthe\s\nconclusion\sof\sa\sTCL\stest.
-D 2016-01-07T02:06:55.894
+C Have\sthe\svdbe\slayer\scall\ssqlite3BtreeEnter()\son\sall\sb-trees\sin\suse\sfrom\swithin\ssqlite3VdbeExec()\seven\sin\sSQLITE_THREADSAFE=0\sbuilds.\sThis\sensures\sthat\sBtShared.db\sis\sset\scorrectly.
+D 2016-01-07T16:06:22.102
 F Makefile.in 7c8cc4c2f0179efc6fa9492141d1fb65f4807054
 F Makefile.linux-gcc 7bc79876b875010e8c8f9502eb935ca92aa3c434
 F Makefile.msc e45d8b9b56dfa3f2cd860b2c28bd9d304513b042
@@ -275,9 +275,9 @@ F src/attach.c e944d0052b577703b9b83aac1638452ff42a8395
 F src/auth.c b56c78ebe40a2110fd361379f7e8162d23f92240
 F src/backup.c 2869a76c03eb393ee795416e2387005553df72bc
 F src/bitvec.c 1a78d450a17c5016710eec900bedfc5729bf9bdf
-F src/btmutex.c 45a968cc85afed9b5e6cf55bf1f42f8d18107f79
-F src/btree.c 4d3452b2a3daf875490ac4f0a278da7f85fabe12
-F src/btree.h 2d76dee44704c47eed323356a758662724b674a0
+F src/btmutex.c bc87dd3b062cc26edfe79918de2200ccb8d41e73
+F src/btree.c d40cbcd254c7d716f9b233a87b69f6dc00b18290
+F src/btree.h 68ef301795e00cdf1d3ab93abc44a43b7fe771e0
 F src/btreeInt.h b5f2651b41808f038dee9282c5dc0232ce6532d3
 F src/build.c d8006e9030c61b9495d0b2f724edd3fcdae16930
 F src/callback.c 7b44ce59674338ad48b0e84e7b72f935ea4f68b0
@@ -400,9 +400,9 @@ F src/util.c e802e8e311a0d6c48cd1b3e89db164f6f0248d70
 F src/vacuum.c 2ddd5cad2a7b9cef7f9e431b8c7771634c6b1701
 F src/vdbe.c 6ac8e5d808d48afc369316e147c191102f0584c1
 F src/vdbe.h efb7a8c1459e31f3ea4377824c6a7e4cb5068637
-F src/vdbeInt.h 75c2e82ee3357e9210c06474f8d9bdf12c81105d
+F src/vdbeInt.h 42eefa4f9e7432b9968d321b44e48821ec13b189
 F src/vdbeapi.c 020681b943e77766b32ae1cddf86d7831b7374ca
-F src/vdbeaux.c 3308a07a6b0b64e22e83cbcc76773eaf330b056a
+F src/vdbeaux.c 5d8c7c04e0f677033efb1292248a5f9056bbc34c
 F src/vdbeblob.c fdc4a81605ae7a35ae94a55bd768b66d6be16f15
 F src/vdbemem.c fdd1578e47bea61390d472de53c565781d81e045
 F src/vdbesort.c a7ec02da4494c59dfd071126dd3726be5a11459d
@@ -1406,7 +1406,10 @@ F tool/vdbe_profile.tcl 246d0da094856d72d2c12efec03250d71639d19f
 F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
 F tool/warnings.sh 48bd54594752d5be3337f12c72f28d2080cb630b
 F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
-P 55a11fd627eaf046b3783622b2925399a50a65b4
-R 5876235b8965be95d77913e3f4573bf2
-U drh
-Z dff9c340c358386729bbf7e0fd3fe53f
+P 4f80440bf566959306f6ca8cbb1fd29d138ee38b
+R 1d753fbc081495ae319f7ae5aa1679d6
+T *branch * shared-cache-fix
+T *sym-shared-cache-fix *
+T -sym-trunk *
+U dan
+Z 04b02aac85ad706faabaa5003739b07e

manifest.uuid

@@ -1 +1 @@
-4f80440bf566959306f6ca8cbb1fd29d138ee38b
+d0214602d44d6b84b7463d530720e2560aee6edf

src/btmutex.c

@@ -169,21 +169,6 @@ int sqlite3BtreeHoldsMutex(Btree *p){
 #endif
 
 
-#ifndef SQLITE_OMIT_INCRBLOB
-/*
-** Enter and leave a mutex on a Btree given a cursor owned by that
-** Btree.  These entry points are used by incremental I/O and can be
-** omitted if that module is not used.
-*/
-void sqlite3BtreeEnterCursor(BtCursor *pCur){
-  sqlite3BtreeEnter(pCur->pBtree);
-}
-void sqlite3BtreeLeaveCursor(BtCursor *pCur){
-  sqlite3BtreeLeave(pCur->pBtree);
-}
-#endif /* SQLITE_OMIT_INCRBLOB */
-
-
 /*
 ** Enter the mutex on every Btree associated with a database
 ** connection.  This is needed (for example) prior to parsing
@@ -217,14 +202,6 @@ void sqlite3BtreeLeaveAll(sqlite3 *db){
   }
 }
 
-/*
-** Return true if a particular Btree requires a lock.  Return FALSE if
-** no lock is ever required since it is not sharable.
-*/
-int sqlite3BtreeSharable(Btree *p){
-  return p->sharable;
-}
-
 #ifndef NDEBUG
 /*
 ** Return true if the current thread holds the database connection
@@ -298,4 +275,23 @@ void sqlite3BtreeEnterAll(sqlite3 *db){
   }
 }
 #endif /* if SQLITE_THREADSAFE */
+
+#ifndef SQLITE_OMIT_INCRBLOB
+/*
+** Enter a mutex on a Btree given a cursor owned by that Btree. 
+**
+** These entry points are used by incremental I/O only. Enter() is required 
+** any time OMIT_SHARED_CACHE is not defined, regardless of whether or not 
+** the build is threadsafe. Leave() is only required by threadsafe builds.
+*/
+void sqlite3BtreeEnterCursor(BtCursor *pCur){
+  sqlite3BtreeEnter(pCur->pBtree);
+}
+# if SQLITE_THREADSAFE
+void sqlite3BtreeLeaveCursor(BtCursor *pCur){
+  sqlite3BtreeLeave(pCur->pBtree);
+}
+# endif
+#endif /* ifndef SQLITE_OMIT_INCRBLOB */
+
 #endif /* ifndef SQLITE_OMIT_SHARED_CACHE */

src/btree.c

@@ -9671,3 +9671,10 @@ int sqlite3BtreeIsReadonly(Btree *p){
 ** Return the size of the header added to each page by this module.
 */
 int sqlite3HeaderSizeBtree(void){ return ROUND8(sizeof(MemPage)); }
+
+/*
+** Return true if the Btree passed as the only argument is sharable.
+*/
+int sqlite3BtreeSharable(Btree *p){
+  return p->sharable;
+}

src/btree.h

@@ -287,15 +287,17 @@ void sqlite3BtreeCursorList(Btree*);
 #ifndef SQLITE_OMIT_SHARED_CACHE
   void sqlite3BtreeEnter(Btree*);
   void sqlite3BtreeEnterAll(sqlite3*);
+  int sqlite3BtreeSharable(Btree*);
+  void sqlite3BtreeEnterCursor(BtCursor*);
 #else
 # define sqlite3BtreeEnter(X) 
 # define sqlite3BtreeEnterAll(X)
+# define sqlite3BtreeSharable(X) 0
+# define sqlite3BtreeEnterCursor(X)
 #endif
 
 #if !defined(SQLITE_OMIT_SHARED_CACHE) && SQLITE_THREADSAFE
-  int sqlite3BtreeSharable(Btree*);
   void sqlite3BtreeLeave(Btree*);
-  void sqlite3BtreeEnterCursor(BtCursor*);
   void sqlite3BtreeLeaveCursor(BtCursor*);
   void sqlite3BtreeLeaveAll(sqlite3*);
 #ifndef NDEBUG
@@ -306,9 +308,7 @@ void sqlite3BtreeCursorList(Btree*);
 #endif
 #else
 
-# define sqlite3BtreeSharable(X) 0
 # define sqlite3BtreeLeave(X)
-# define sqlite3BtreeEnterCursor(X)
 # define sqlite3BtreeLeaveCursor(X)
 # define sqlite3BtreeLeaveAll(X)
 

src/vdbeInt.h

@@ -489,11 +489,15 @@ int sqlite3VdbeSorterRewind(const VdbeCursor *, int *);
 int sqlite3VdbeSorterWrite(const VdbeCursor *, Mem *);
 int sqlite3VdbeSorterCompare(const VdbeCursor *, Mem *, int, int *);
 
-#if !defined(SQLITE_OMIT_SHARED_CACHE) && SQLITE_THREADSAFE>0
+#if !defined(SQLITE_OMIT_SHARED_CACHE) 
   void sqlite3VdbeEnter(Vdbe*);
-  void sqlite3VdbeLeave(Vdbe*);
 #else
 # define sqlite3VdbeEnter(X)
+#endif
+
+#if !defined(SQLITE_OMIT_SHARED_CACHE) && SQLITE_THREADSAFE>0
+  void sqlite3VdbeLeave(Vdbe*);
+#else
 # define sqlite3VdbeLeave(X)
 #endif
 

src/vdbeaux.c

@@ -1317,7 +1317,7 @@ void sqlite3VdbeUsesBtree(Vdbe *p, int i){
   }
 }
 
-#if !defined(SQLITE_OMIT_SHARED_CACHE) && SQLITE_THREADSAFE>0
+#if !defined(SQLITE_OMIT_SHARED_CACHE)
 /*
 ** If SQLite is compiled to support shared-cache mode and to be threadsafe,
 ** this routine obtains the mutex associated with each BtShared structure