Add assert() statement to verify that new mutexes are not allocated when

the mutex subsystem is uninitialized.

FossilOrigin-Name: 1183c533571bc9c7ce56102b718f3e4f4e78019e

manifest

@@ -1,5 +1,8 @@
-C Fix\sa\sproblem\swith\sthe\ssqlite3VdbeMayAbort()\sassert\sfailing\sfollowing\san\sOOM.
+-----BEGIN PGP SIGNED MESSAGE-----
-D 2009-09-10T16:14:51
+Hash: SHA1
+
+C Add\sassert()\sstatement\sto\sverify\sthat\snew\smutexes\sare\snot\sallocated\swhen\nthe\smutex\ssubsystem\sis\suninitialized.
+D 2009-09-10T17:45:00
 F Makefile.arm-wince-mingw32ce-gcc fcd5e9cd67fe88836360bb4f9ef4cb7f8e2fb5a0
 F Makefile.in 73ddeec9dd10b85876c5c2ce1fdce627e1dcc7f8
 F Makefile.linux-gcc d53183f4aa6a9192d249731c90dbdffbd2c68654
@@ -134,7 +137,7 @@ F src/mem2.c d02bd6a5b34f2d59012a852615621939d9c09548
 F src/mem3.c 67153ec933e08b70714055e872efb58a6b287939
 F src/mem5.c 4837b795ebdecc0cfe1522cd0c8b2c5d84ea490d
 F src/memjournal.c e68cb5f7e828b84d5bf2ea16c5d87f1ed7e9fe7f
-F src/mutex.c 73899d158560117c02909b6e9ffe2bad2560a817
+F src/mutex.c 60cd6d854e1c5dbedd9928815c00d63ec24283a9
 F src/mutex.h 9e686e83a88838dac8b9c51271c651e833060f1e
 F src/mutex_noop.c f5a07671f25a1a9bd7c10ad7107bc2585446200f
 F src/mutex_os2.c 6b5a74f812082a8483c3df05b47bbaac2424b9a0
@@ -750,7 +753,14 @@ F tool/speedtest2.tcl ee2149167303ba8e95af97873c575c3e0fab58ff
 F tool/speedtest8.c 2902c46588c40b55661e471d7a86e4dd71a18224
 F tool/speedtest8inst1.c 293327bc76823f473684d589a8160bde1f52c14e
 F tool/vdbe-compress.tcl d70ea6d8a19e3571d7ab8c9b75cba86d1173ff0f
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+P b3027863505fa8edf355f3f5eea4502ef365175e
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+R 08804fe3d59d9c44cb7b080e511dfef2
-U dan
+U drh
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+Z 0e4a69ed44dd7c7502a8c79038532167
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manifest.uuid

@@ -1 +1 @@
-b3027863505fa8edf355f3f5eea4502ef365175e
+1183c533571bc9c7ce56102b718f3e4f4e78019e

src/mutex.c

@@ -18,6 +18,16 @@
 */
 #include "sqliteInt.h"
 
+#ifdef SQLITE_DEBUG
+/*
+** For debugging purposes, record when the mutex subsystem is initialized
+** and uninitialized so that we can assert() if there is an attempt to
+** allocate a mutex while the system is uninitialized.
+*/
+static SQLITE_WSD int mutexIsInit = 0;
+#endif /* SQLITE_DEBUG */
+
+
 #ifndef SQLITE_MUTEX_OMIT
 /*
 ** Initialize the mutex system.
@@ -42,6 +52,10 @@ int sqlite3MutexInit(void){
     rc = sqlite3GlobalConfig.mutex.xMutexInit();
   }
 
+#ifdef SQLITE_DEBUG
+  GLOBAL(int, mutexIsInit) = 1;
+#endif
+
   return rc;
 }
 
@@ -54,6 +68,11 @@ int sqlite3MutexEnd(void){
   if( sqlite3GlobalConfig.mutex.xMutexEnd ){
     rc = sqlite3GlobalConfig.mutex.xMutexEnd();
   }
+
+#ifdef SQLITE_DEBUG
+  GLOBAL(int, mutexIsInit) = 0;
+#endif
+
   return rc;
 }
 
@@ -71,6 +90,7 @@ sqlite3_mutex *sqlite3MutexAlloc(int id){
   if( !sqlite3GlobalConfig.bCoreMutex ){
     return 0;
   }
+  assert( GLOBAL(int, mutexIsInit) );
   return sqlite3GlobalConfig.mutex.xMutexAlloc(id);
 }