@@ 1,180 0,0 @@
-Add an experimental fix to avoid attempting to mmap memory from an
-offset that is not a multiple of the system page size on systems with
-page sizes larger than 32KB.
-
-Patch by Dan Kennedy <danielk1977@gmail.com>.
-
---- sqlite-autoconf/sqlite3.c.orig	2014-03-22 23:44:47.055908203 -0400
-+++ sqlite-autoconf/sqlite3.c	2014-03-22 23:44:06.716552734 -0400
-@@ -24010,6 +24010,7 @@
- 
- /* Forward reference */
- static int openDirectory(const char*, int*);
-+static int unixGetpagesize(void);
- 
- /*
- ** Many system calls are accessed through pointer-to-functions so that
-@@ -24133,6 +24134,9 @@
- #define osMremap ((void*(*)(void*,size_t,size_t,int,...))aSyscall[23].pCurrent)
- #endif
- 
-+  { "getpagesize",  (sqlite3_syscall_ptr)unixGetpagesize, 0 },
-+#define osGetpagesize ((int(*)(void))aSyscall[24].pCurrent)
-+
- }; /* End of the overrideable system calls */
- 
- /*
-@@ -27792,6 +27796,36 @@
-   return rc;        
- }
- 
-+/*
-+** Return the system page size.
-+**
-+** This function should not be called directly by other code in this file. 
-+** Instead, it should be called via macro osGetpagesize().
-+*/
-+static int unixGetpagesize(void){
-+#if defined(_BSD_SOURCE)
-+  return getpagesize();
-+#else
-+  return (int)sysconf(_SC_PAGESIZE);
-+#endif
-+}
-+
-+/*
-+** Return the minimum number of 32KB shm regions that should be mapped at
-+** a time, assuming that each mapping must be an integer multiple of the
-+** current system page-size.
-+**
-+** Usually, this is 1. The exception seems to be systems that are configured
-+** to use 64KB pages - in this case each mapping must cover at least two
-+** shm regions.
-+*/
-+static int unixShmRegionPerMap(void){
-+  int shmsz = 32*1024;            /* SHM region size */
-+  int pgsz = osGetpagesize();   /* System page size */
-+  assert( ((pgsz-1)&pgsz)==0 );   /* Page size must be a power of 2 */
-+  if( pgsz<shmsz ) return 1;
-+  return pgsz/shmsz;
-+}
- 
- /*
- ** Purge the unixShmNodeList list of all entries with unixShmNode.nRef==0.
-@@ -27803,10 +27837,11 @@
-   unixShmNode *p = pFd->pInode->pShmNode;
-   assert( unixMutexHeld() );
-   if( p && p->nRef==0 ){
-+    int nShmPerMap = unixShmRegionPerMap();
-     int i;
-     assert( p->pInode==pFd->pInode );
-     sqlite3_mutex_free(p->mutex);
--    for(i=0; i<p->nRegion; i++){
-+    for(i=0; i<p->nRegion; i+=nShmPerMap){
-       if( p->h>=0 ){
-         osMunmap(p->apRegion[i], p->szRegion);
-       }else{
-@@ -28013,6 +28048,8 @@
-   unixShm *p;
-   unixShmNode *pShmNode;
-   int rc = SQLITE_OK;
-+  int nShmPerMap = unixShmRegionPerMap();
-+  int nReqRegion;
- 
-   /* If the shared-memory file has not yet been opened, open it now. */
-   if( pDbFd->pShm==0 ){
-@@ -28028,9 +28065,12 @@
-   assert( pShmNode->h>=0 || pDbFd->pInode->bProcessLock==1 );
-   assert( pShmNode->h<0 || pDbFd->pInode->bProcessLock==0 );
- 
--  if( pShmNode->nRegion<=iRegion ){
-+  /* Minimum number of regions required to be mapped. */
-+  nReqRegion = ((iRegion+nShmPerMap) / nShmPerMap) * nShmPerMap;
-+
-+  if( pShmNode->nRegion<nReqRegion ){
-     char **apNew;                      /* New apRegion[] array */
--    int nByte = (iRegion+1)*szRegion;  /* Minimum required file size */
-+    int nByte = nReqRegion*szRegion;   /* Minimum required file size */
-     struct stat sStat;                 /* Used by fstat() */
- 
-     pShmNode->szRegion = szRegion;
-@@ -28079,17 +28119,19 @@
- 
-     /* Map the requested memory region into this processes address space. */
-     apNew = (char **)sqlite3_realloc(
--        pShmNode->apRegion, (iRegion+1)*sizeof(char *)
-+        pShmNode->apRegion, nReqRegion*sizeof(char *)
-     );
-     if( !apNew ){
-       rc = SQLITE_IOERR_NOMEM;
-       goto shmpage_out;
-     }
-     pShmNode->apRegion = apNew;
--    while(pShmNode->nRegion<=iRegion){
-+    while( pShmNode->nRegion<nReqRegion ){
-+      int nMap = szRegion*nShmPerMap;
-+      int i;
-       void *pMem;
-       if( pShmNode->h>=0 ){
--        pMem = osMmap(0, szRegion,
-+        pMem = osMmap(0, nMap,
-             pShmNode->isReadonly ? PROT_READ : PROT_READ|PROT_WRITE, 
-             MAP_SHARED, pShmNode->h, szRegion*(i64)pShmNode->nRegion
-         );
-@@ -28105,8 +28147,11 @@
-         }
-         memset(pMem, 0, szRegion);
-       }
--      pShmNode->apRegion[pShmNode->nRegion] = pMem;
--      pShmNode->nRegion++;
-+
-+      for(i=0; i<nShmPerMap; i++){
-+        pShmNode->apRegion[pShmNode->nRegion+i] = &((char*)pMem)[szRegion*i];
-+      }
-+      pShmNode->nRegion += nShmPerMap;
-     }
-   }
- 
-@@ -28321,19 +28366,6 @@
- }
- 
- /*
--** Return the system page size.
--*/
--static int unixGetPagesize(void){
--#if HAVE_MREMAP
--  return 512;
--#elif defined(_BSD_SOURCE)
--  return getpagesize();
--#else
--  return (int)sysconf(_SC_PAGESIZE);
--#endif
--}
--
--/*
- ** Attempt to set the size of the memory mapping maintained by file 
- ** descriptor pFd to nNew bytes. Any existing mapping is discarded.
- **
-@@ -28369,8 +28401,12 @@
-   if( (pFd->ctrlFlags & UNIXFILE_RDONLY)==0 ) flags |= PROT_WRITE;
- 
-   if( pOrig ){
--    const int szSyspage = unixGetPagesize();
-+#if HAVE_MREMAP
-+    i64 nReuse = pFd->mmapSize;
-+#else
-+    const int szSyspage = osGetpagesize();
-     i64 nReuse = (pFd->mmapSize & ~(szSyspage-1));
-+#endif
-     u8 *pReq = &pOrig[nReuse];
- 
-     /* Unmap any pages of the existing mapping that cannot be reused. */
-@@ -31116,7 +31152,7 @@
- 
-   /* Double-check that the aSyscall[] array has been constructed
-   ** correctly.  See ticket [bb3a86e890c8e96ab] */
--  assert( ArraySize(aSyscall)==24 );
-+  assert( ArraySize(aSyscall)==25 );
- 
-   /* Register all VFSes defined in the aVfs[] array */
-   for(i=0; i<(sizeof(aVfs)/sizeof(sqlite3_vfs)); i++){