Fix a tsan error that could occur when using shared-cache mode.

FossilOrigin-Name: 61981b97475a747dc04e6fb80e01e35e41e5d7d30a1207f82b2ef7be3866d30a

diff --git a/manifest b/manifest
index bf63e657f2cec8cc763c02caea40149dfe572cfd..11e359290079b97f77421e70d043d95899426b47 100644 (file)
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Fix\sanother\s(harmless\sin\spractice)\stsan\serror\sin\sshared-cache\smode.
-D 2020-09-16T16:44:57.580
+C Fix\sa\stsan\serror\sthat\scould\soccur\swhen\susing\sshared-cache\smode.
+D 2020-09-16T16:45:35.491
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -476,7 +476,7 @@ F src/auth.c a3d5bfdba83d25abed1013a8c7a5f204e2e29b0c25242a56bc02bb0c07bf1e06
 F src/backup.c b1c90cd4110248c8e1273ff4578d3a84c0c34725e1b96dacd4a6294a908702de
 F src/bitvec.c 17ea48eff8ba979f1f5b04cc484c7bb2be632f33
 F src/btmutex.c 8acc2f464ee76324bf13310df5692a262b801808984c1b79defb2503bbafadb6
-F src/btree.c 1439fd9b45d4d1883c53752daef42af489adaa1a1508fa39dedbc9c80ea21a2f
+F src/btree.c 73a3e74e0f6116ba43175577d8fd5eee66794908ae30dde6a0dcf317d2abfd81
 F src/btree.h 7af72bbb4863c331c8f6753277ab40ee67d2a2125a63256d5c25489722ec162b
 F src/btreeInt.h 83166f6daeb91062b6ae9ee6247b3ad07e40eba58f3c05ba9e8dedad4ab1ea38
 F src/build.c dbdaee54ffef924a070eb6202017e10d6be56baab953ef0a8e714a6def683198
@@ -1437,7 +1437,7 @@ F test/thread2.test f35d2106452b77523b3a2b7d1dcde2e5ee8f9e46
 F test/thread_common.tcl 334639cadcb9f912bf82aa73f49efd5282e6cadd
 F test/threadtest1.c 6029d9c5567db28e6dc908a0c63099c3ba6c383b
 F test/threadtest2.c a70a8e94bef23339d34226eb9521015ef99f4df8
-F test/threadtest3.c 38a612ea62854349ed66372f330a40d73c5cf956
+F test/threadtest3.c e63013af10cf236c7610eb06d33bde08c861806dc64be811940ff4d9ddd34a4f
 F test/threadtest4.c c1e67136ceb6c7ec8184e56ac61db28f96bd2925
 F test/time-wordcount.sh 8e0b0f8109367827ad5d58f5cc849705731e4b90
 F test/tkt-02a8e81d44.test 6c80d9c7514e2a42d4918bf87bf6bc54f379110c
@@ -1613,6 +1613,7 @@ F test/trustschema1.test 4e970aef0bfe0cee139703cc7209d0e0f07725d999b180ba50770f4
 F test/tt3_checkpoint.c 9e75cf7c1c364f52e1c47fd0f14c4340a9db0fe1
 F test/tt3_index.c 39eec10a35f57672225be4d182862152896dee4a
 F test/tt3_lookaside1.c 0377e202c3c2a50d688cb65ba203afeda6fafeb9
+F test/tt3_shared.c b37d22defc944a2ac4c91c927fd06c1d48cd51e2ce9d004fe868625bd2399f93
 F test/tt3_stress.c f9a769ca8b026ecc76ee93ca8c9700a5619f8e51c581107c4053ba6ac97f616f
 F test/tt3_vacuum.c 1753f45917699c9c1f66b64c717a717c9379f776
 F test/types.test bf816ce73c7dfcfe26b700c19f97ef4050d194ff
@@ -1879,9 +1880,8 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 1b4801de2d4c24ba8aeed5df9d8c4dd6263969c6013626b6142346daa57a9d75
-Q +5a74fa3f0a64f462c8add9beae231a9bbdd19e54d07b54f08726cb1411fc8d3a
-Q +5dd05940617fb05ee2faf212b15afc3a8e9695318eccb76761b37359fea681d1
-R bc369b6132a9d26cab6ac0750fd88eaf
+P 553e20c3d7dcd35077d758987c411806c4574b0f8b8a1fbd63d3321dd076a0b0
+Q +de80bc87300257cc49d98e2d22e914211f213dce912f320c8b37b3883c73923c
+R 286669a37fca71d0e175626276bb973d
 U dan
-Z c7f08fd8eeae3f27af54a2d3b3d4e4cc
+Z 60bbc2c4ca2feb1b2bbc49267c238176

diff --git a/manifest.uuid b/manifest.uuid
index 09bb9c949064e0f6d32b2d1b913b55883fd7f984..4d0090665e88d5d8fa051019ba4d887e9c34c15a 100644 (file)
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-553e20c3d7dcd35077d758987c411806c4574b0f8b8a1fbd63d3321dd076a0b0
\ No newline at end of file
+61981b97475a747dc04e6fb80e01e35e41e5d7d30a1207f82b2ef7be3866d30a
\ No newline at end of file

diff --git a/src/btree.c b/src/btree.c
index 919d3b87cd88622d3d7d0045588e2da85662e410..ff673b59dcc6d90cc244c4dac16ae4226c0a9aef 100644 (file)
--- a/src/btree.c
+++ b/src/btree.c
@@ -2605,7 +2605,7 @@ btree_open_out:
     ** do not change the pager-cache size.
     */
     if( sqlite3BtreeSchema(p, 0, 0)==0 ){
-      sqlite3PagerSetCachesize(p->pBt->pPager, SQLITE_DEFAULT_CACHE_SIZE);
+      sqlite3BtreeSetCacheSize(p, SQLITE_DEFAULT_CACHE_SIZE);
     }
 
     pFile = sqlite3PagerFile(pBt->pPager);

diff --git a/test/threadtest3.c b/test/threadtest3.c
index 6062b6428577d1023a866df6a54cf09299f015b6..41c0fb9ac69a254d6037504f93d5c1ecd34c7462 100644 (file)
--- a/test/threadtest3.c
+++ b/test/threadtest3.c
@@ -1433,6 +1433,7 @@ static void dynamic_triggers(int nMs){
 #include "tt3_lookaside1.c"
 #include "tt3_vacuum.c"
 #include "tt3_stress.c"
+#include "tt3_shared.c"
 
 int main(int argc, char **argv){
   struct ThreadTest {
@@ -1457,6 +1458,7 @@ int main(int argc, char **argv){
     { vacuum1,             "vacuum1", 10000 },
     { stress1,             "stress1", 10000 },
     { stress2,             "stress2", 60000 },
+    { shared1,             "shared1", 10000 },
   };
   static char *substArgv[] = { 0, "*", 0 };
   int i, iArg;

diff --git a/test/tt3_shared.c b/test/tt3_shared.c
new file mode 100644 (file)
index 0000000..5bdadd1
--- /dev/null
+++ b/test/tt3_shared.c
@@ -0,0 +1,55 @@
+/*
+** 2020 September 5
+**
+** The author disclaims copyright to this source code.  In place of
+** a legal notice, here is a blessing:
+**
+**    May you do good and not evil.
+**    May you find forgiveness for yourself and forgive others.
+**    May you share freely, never taking more than you give.
+**
+*************************************************************************
+**
+**
+*/
+
+
+/*
+*/
+static char *shared_thread1(int iTid, void *pArg){
+  Error err = {0};                /* Error code and message */
+
+  while( !timetostop(&err) ){
+    Sqlite db = {0};              /* SQLite database connection */
+    opendb(&err, &db, "test.db", 0);
+    sql_script(&err, &db, "SELECT * FROM t1");
+    closedb(&err, &db);
+  }
+  print_and_free_err(&err);
+  return sqlite3_mprintf("done!");
+}
+
+
+static void shared1(int nMs){
+  Error err = {0};
+  Sqlite db = {0};              /* SQLite database connection */
+  Threadset threads = {0};
+  int ii;
+
+  opendb(&err, &db, "test.db", 1);
+  sql_script(&err, &db, "CREATE TABLE t1(x)");
+  closedb(&err, &db);
+
+  setstoptime(&err, nMs);
+  sqlite3_enable_shared_cache(1);
+
+  for(ii=0; ii<5; ii++){
+    launch_thread(&err, &threads, shared_thread1, 0);
+  }
+
+  join_all_threads(&err, &threads);
+  sqlite3_enable_shared_cache(0);
+
+  print_and_free_err(&err);
+}
+