Use the actual size of memory allocations to update the memory status

counters.  Fix the roundup() function of mem3 to be much closer to the
actual allocation size.  Ticket #3226. (CVS 5440)

FossilOrigin-Name: 5c22132eb171058f30ec5b7562b8164611236748

manifest

@@ -1,5 +1,5 @@
-C Fix\sSQLITE_OMIT_AUTOVACUUM\sso\sthat\sit\sworks\sagain.\s\sTicket\s#3228.\s(CVS\s5439)
-D 2008-07-18T17:16:26
+C Use\sthe\sactual\ssize\sof\smemory\sallocations\sto\supdate\sthe\smemory\sstatus\ncounters.\s\sFix\sthe\sroundup()\sfunction\sof\smem3\sto\sbe\smuch\scloser\sto\sthe\nactual\sallocation\ssize.\s\sTicket\s#3226.\s(CVS\s5440)
+D 2008-07-18T18:56:17
 F Makefile.arm-wince-mingw32ce-gcc fcd5e9cd67fe88836360bb4f9ef4cb7f8e2fb5a0
 F Makefile.in a03f7cb4f7ad50bc53a788c6c544430e81f95de4
 F Makefile.linux-gcc d53183f4aa6a9192d249731c90dbdffbd2c68654
@@ -116,11 +116,11 @@ F src/journal.c cffd2cd214e58c0e99c3ff632b3bee6c7cbb260e
 F src/legacy.c 3626c71fb70912abec9a4312beba753a9ce800df
 F src/loadext.c ae0eed9fa96d74172d2a90ee63b5bc36d284295c
 F src/main.c 59b622b0f6b6c4b44a23a71ae8dac53bfec113ca
-F src/malloc.c b9ff4e02fee17d2158cc52ac44a02a56bde3cf62
+F src/malloc.c c4b525896b8c188dab98609180d13dbeeeb33a84
 F src/md5.c 008216bbb5d34c6fbab5357aa68575ad8a31516a
 F src/mem1.c 8340fa5f969e9f9b9bdeb54106457a2003456d2b
 F src/mem2.c 0fc5bd6581c80f3ebd9d0cdf0f3f9c08826397ba
-F src/mem3.c 71e43d6be24b014a43b1989ae7adec04817ca6e4
+F src/mem3.c c73e935d0b900abc51d5fa45f880937b062f4a9f
 F src/mem4.c 6703adb1717b26d9d70a1c2586b4b7b7ffee7909
 F src/mem5.c 0b0ba1c2a02d86eb812dea6debacee841e3856f7
 F src/mutex.c a485a0eac8ee2cd95f66e565b4c6696c18db968f
@@ -608,7 +608,7 @@ F tool/speedtest16.c c8a9c793df96db7e4933f0852abb7a03d48f2e81
 F tool/speedtest2.tcl ee2149167303ba8e95af97873c575c3e0fab58ff
 F tool/speedtest8.c 1dbced29de5f59ba2ebf877edcadf171540374d1
 F tool/speedtest8inst1.c 293327bc76823f473684d589a8160bde1f52c14e
-P 17a9984e7668be388c4042c070718a02b284a336
-R fc1f20f039a938f387418775ef20dd0c
+P 3b2dd417f9dab3cae3ab3693629a65a2c90f00e9
+R b952824ae01948aa242495ef9fa716b0
 U drh
-Z e1c31d25d091e2b3a4d8324915e2d849
+Z a0ec33b666d5637887a3dcf000e051b2

manifest.uuid

@@ -1 +1 @@
-3b2dd417f9dab3cae3ab3693629a65a2c90f00e9
+5c22132eb171058f30ec5b7562b8164611236748

src/malloc.c

@@ -12,7 +12,7 @@
 **
 ** Memory allocation functions used throughout sqlite.
 **
-** $Id: malloc.c,v 1.28 2008/07/14 12:38:21 drh Exp $
+** $Id: malloc.c,v 1.29 2008/07/18 18:56:17 drh Exp $
 */
 #include "sqliteInt.h"
 #include <stdarg.h>
@@ -224,7 +224,10 @@ static int mallocWithAlarm(int n, void **pp){
     sqlite3MallocAlarm(nFull);
     p = sqlite3Config.m.xMalloc(nFull);
   }
-  if( p ) sqlite3StatusAdd(SQLITE_STATUS_MEMORY_USED, nFull);
+  if( p ){
+    nFull = sqlite3MallocSize(p);
+    sqlite3StatusAdd(SQLITE_STATUS_MEMORY_USED, nFull);
+  }
   *pp = p;
   return nFull;
 }
@@ -504,6 +507,7 @@ void *sqlite3Realloc(void *pOld, int nBytes){
         pNew = sqlite3Config.m.xRealloc(pOld, nNew);
       }
       if( pNew ){
+        nNew = sqlite3MallocSize(pNew);
         sqlite3StatusAdd(SQLITE_STATUS_MEMORY_USED, nNew-nOld);
       }
     }

src/mem3.c

@@ -23,7 +23,7 @@
 ** This version of the memory allocation subsystem is included
 ** in the build only if SQLITE_ENABLE_MEMSYS3 is defined.
 **
-** $Id: mem3.c,v 1.19 2008/07/16 12:25:32 drh Exp $
+** $Id: mem3.c,v 1.20 2008/07/18 18:56:17 drh Exp $
 */
 #include "sqliteInt.h"
 
@@ -138,7 +138,6 @@ static struct {
   */
   u32 nPool;
   Mem3Block *aPool;
-  /* Mem3Block aPool[SQLITE_MEMORY_SIZE/sizeof(Mem3Block)+2]; */
 } mem3;
 
 /*
@@ -470,6 +469,30 @@ void memsys3FreeUnsafe(void *pOld){
   }
 }
 
+/*
+** Return the size of an outstanding allocation, in bytes.  The
+** size returned omits the 8-byte header overhead.  This only
+** works for chunks that are currently checked out.
+*/
+static int memsys3Size(void *p){
+  Mem3Block *pBlock;
+  if( p==0 ) return 0;
+  pBlock = (Mem3Block*)p;
+  assert( (pBlock[-1].u.hdr.size4x&1)!=0 );
+  return (pBlock[-1].u.hdr.size4x&~3)*2 - 4;
+}
+
+/*
+** Round up a request size to the next valid allocation size.
+*/
+static int memsys3Roundup(int n){
+  if( n<=12 ){
+    return 12;
+  }else{
+    return ((n+11)&~7) - 4;
+  }
+}
+
 /*
 ** Allocate nBytes of memory.
 */
@@ -492,19 +515,6 @@ void memsys3Free(void *pPrior){
   memsys3Leave();
 }
 
-/*
-** Return the size of an outstanding allocation, in bytes.  The
-** size returned omits the 8-byte header overhead.  This only
-** works for chunks that are currently checked out.
-*/
-static int memsys3Size(void *p){
-  Mem3Block *pBlock;
-  if( p==0 ) return 0;
-  pBlock = (Mem3Block*)p;
-  assert( (pBlock[-1].u.hdr.size4x&1)!=0 );
-  return (pBlock[-1].u.hdr.size4x&~3)*2 - 4;
-}
-
 /*
 ** Change the size of an existing memory allocation
 */
@@ -536,13 +546,6 @@ void *memsys3Realloc(void *pPrior, int nBytes){
   return p;
 }
 
-/*
-** Round up a request size to the next valid allocation size.
-*/
-static int memsys3Roundup(int n){
-  return (n+7) & ~7;
-}
-
 /*
 ** Initialize this module.
 */