Fix a problem with the sqlite3VdbeMayAbort() assert failing following an OOM.

FossilOrigin-Name: b3027863505fa8edf355f3f5eea4502ef365175e

manifest

@@ -1,5 +1,5 @@
-C Remove\san\sALWAYS\smacro\saround\san\sexpression\sthat\sis\ssometimes\sfalse.
+C Fix\sa\sproblem\swith\sthe\ssqlite3VdbeMayAbort()\sassert\sfailing\sfollowing\san\sOOM.
-D 2009-09-10T10:15:59
+D 2009-09-10T16:14:51
 F Makefile.arm-wince-mingw32ce-gcc fcd5e9cd67fe88836360bb4f9ef4cb7f8e2fb5a0
 F Makefile.in 73ddeec9dd10b85876c5c2ce1fdce627e1dcc7f8
 F Makefile.linux-gcc d53183f4aa6a9192d249731c90dbdffbd2c68654
@@ -109,7 +109,7 @@ F src/btmutex.c 0f43a75bb5b8147b386e8e1c3e71ba734e3863b7
 F src/btree.c 9c425425784c5d569bc0309c22251698ba906451
 F src/btree.h 577448a890c2ab9b21e6ab74f073526184bceebe
 F src/btreeInt.h 1c86297e69380f6577e7ae67452597dd8d5c2705
-F src/build.c 5269733241f459705189aa39f4eacf18b10d7661
+F src/build.c 7569d7e263927530a75751fabd3e8889392f104a
 F src/callback.c f49c305dc94b78da948953c392963929c0e70f9b
 F src/complete.c 5ad5c6cd4548211867c204c41a126d73a9fbcea0
 F src/date.c ab5f7137656652a48434d64f96bdcdc823bb23b3
@@ -206,10 +206,10 @@ F src/utf.c 99cf927eabb104621ba889ac0dd075fc1657ad30
 F src/util.c 59d4e9456bf1fe581f415a783fa0cee6115c8f35
 F src/vacuum.c 3fe0eebea6d2311c1c2ab2962887d11f7a4dcfb0
 F src/vdbe.c 3c094e85665fee59a3329c2ed1d2af1156d97dda
-F src/vdbe.h 13e00f573bccf0c03e95fd3d4759da4ea9b75e60
+F src/vdbe.h 7d5075e3fa4e5587a9be8d5e503857c825490cef
 F src/vdbeInt.h 004dbb28a9195b6c85fe3255c7cc300ffd8b9453
 F src/vdbeapi.c b7e5f34436e298e2b0168e71323b5d97f7e9b080
-F src/vdbeaux.c 257f9ab8631b3f31e69a937f1fd8aa3adf3f4209
+F src/vdbeaux.c c167e90225626870a91f5650658e85b6f7a33794
 F src/vdbeblob.c 4d6b702ca714a2d52552eee72d3e3191f8444eab
 F src/vdbemem.c 0ff2b209fccade3ff6709286057b82ed7f6c1e70
 F src/vtab.c 3e54fe39374e5feb8b174de32a90e7a21966025d
@@ -750,7 +750,7 @@ F tool/speedtest2.tcl ee2149167303ba8e95af97873c575c3e0fab58ff
 F tool/speedtest8.c 2902c46588c40b55661e471d7a86e4dd71a18224
 F tool/speedtest8inst1.c 293327bc76823f473684d589a8160bde1f52c14e
 F tool/vdbe-compress.tcl d70ea6d8a19e3571d7ab8c9b75cba86d1173ff0f
-P 913fb70ea85f05d94db5cf2e692a7c8b7489e3ba
+P f2a9ee722c568e73f2a08fb6a2886719850f2923
-R 0fa996f8c14954d9063c15cdbb2d4607
+R 0b14469668328c64842d4f0eb53973f8
 U dan
-Z 5388363c4cc3ec0e91ee2d40bcc75a97
+Z db4c68226e60cda5c9b94fd0b4485956

manifest.uuid

@@ -1 +1 @@
-f2a9ee722c568e73f2a08fb6a2886719850f2923
+b3027863505fa8edf355f3f5eea4502ef365175e

src/build.c

@@ -138,7 +138,8 @@ void sqlite3FinishCoding(Parse *pParse){
   ** vdbe program
   */
   v = sqlite3GetVdbe(pParse);
-  assert( pParse->isMultiWrite==0 || sqlite3VdbeMayAbort(v)==pParse->mayAbort );
+  assert( !pParse->isMultiWrite 
+       || sqlite3VdbeAssertMayAbort(v, pParse->mayAbort));
   if( v ){
     sqlite3VdbeAddOp0(v, OP_Halt);
 

src/vdbe.h

@@ -189,7 +189,7 @@ int sqlite3VdbeFinalize(Vdbe*);
 void sqlite3VdbeResolveLabel(Vdbe*, int);
 int sqlite3VdbeCurrentAddr(Vdbe*);
 #ifdef SQLITE_DEBUG
-  int sqlite3VdbeMayAbort(Vdbe*);
+  int sqlite3VdbeAssertMayAbort(Vdbe *, int);
   void sqlite3VdbeTrace(Vdbe*,FILE*);
 #endif
 void sqlite3VdbeResetStepResult(Vdbe*);

src/vdbeaux.c

@@ -311,7 +311,7 @@ static Op *opIterNext(VdbeOpIter *p){
 }
 
 /*
-** Return true if the program stored in the VM passed as an argument may
+** Check if the program stored in the VM associated with pParse may
 ** throw an ABORT exception (causing the statement, but not transaction
 ** to be rolled back). This condition is true if the main program or any
 ** sub-programs contains any of the following:
@@ -322,10 +322,15 @@ static Op *opIterNext(VdbeOpIter *p){
 **   *  OP_VUpdate
 **   *  OP_VRename
 **
-** This function is only used as part of an assert() statement. 
+** Then check that the value of Parse.mayAbort is true if an
+** ABORT may be thrown, or false otherwise. Return true if it does
+** match, or false otherwise. This function is intended to be used as
+** part of an assert statement in the compiler. Similar to:
+**
+**   assert( sqlite3VdbeAssertMayAbort(pParse->pVdbe, pParse->mayAbort) );
 */
-int sqlite3VdbeMayAbort(Vdbe *v){
+int sqlite3VdbeAssertMayAbort(Vdbe *v, int mayAbort){
-  int mayAbort = 0;
+  int hasAbort = 0;
   Op *pOp;
   VdbeOpIter sIter;
   memset(&sIter, 0, sizeof(sIter));
@@ -337,13 +342,18 @@ int sqlite3VdbeMayAbort(Vdbe *v){
      || ((opcode==OP_Halt || opcode==OP_HaltIfNull) 
       && (pOp->p1==SQLITE_CONSTRAINT && pOp->p2==OE_Abort))
     ){
-      mayAbort = 1;
+      hasAbort = 1;
       break;
     }
   }
-
   sqlite3DbFree(v->db, sIter.apSub);
-  return mayAbort;
+
+  /* Return true if hasAbort==mayAbort. Or if a malloc failure occured.
+  ** If malloc failed, then the while() loop above may not have iterated
+  ** through all opcodes and hasAbort may be set incorrectly. Return
+  ** true for this case to prevent the assert() in the callers frame
+  ** from failing.  */
+  return ( v->db->mallocFailed || hasAbort==mayAbort );
 }
 #endif