Change the fake_big_file test command so that it fails for files larger than

2MB on Windows, as we have observed that Window10 will sometimes bluescreen
when operating on very large sparse files.

FossilOrigin-Name: d39ffd2abadcc85c46ba17612f9f575005b4818e18bf39362b8ee574837cfad9

manifest

@@ -1,5 +1,5 @@
-C Avoid\srunning\sbigsort.test\swith\sSQLITE_DEBUG\sbuilds.\sThe\sassert()\sstatements\sadded\sin\s[7c96a56]\smake\sit\stoo\sslow.
-D 2022-11-14T17:48:26.028
+C Change\sthe\sfake_big_file\stest\scommand\sso\sthat\sit\sfails\sfor\sfiles\slarger\sthan\n2MB\son\sWindows,\sas\swe\shave\sobserved\sthat\sWindow10\swill\ssometimes\sbluescreen\nwhen\soperating\son\svery\slarge\ssparse\sfiles.
+D 2022-11-14T18:57:21.280
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -648,7 +648,7 @@ F src/status.c 160c445d7d28c984a0eae38c144f6419311ed3eace59b44ac6dafc20db4af749
 F src/table.c 0f141b58a16de7e2fbe81c308379e7279f4c6b50eb08efeec5892794a0ba30d1
 F src/tclsqlite.c 4e64ba300a5a26e0f1170e09032429faeb65e45e8f3d1a7833e8edb69fc2979e
 F src/test1.c 40c9a40975512985762f87b83d0c63e4904833a9fe78cbcca664a37095301b1d
-F src/test2.c 3efb99ab7f1fc8d154933e02ae1378bac9637da5
+F src/test2.c 81156697ce4b6f055775f861dba082a38293a09163aed0ac71331549ebdcc457
 F src/test3.c 61798bb0d38b915067a8c8e03f5a534b431181f802659a6616f9b4ff7d872644
 F src/test4.c 4533b76419e7feb41b40582554663ed3cd77aaa54e135cf76b3205098cd6e664
 F src/test5.c 328aae2c010c57a9829d255dc099d6899311672d
@@ -822,7 +822,7 @@ F test/bestindex9.test bf2eb8556e8d5c00ef3ee18c521751cd03c1b55454b6e7683b4c6742e
 F test/between.test b9a65fb065391980119e8a781a7409d3fcf059d89968279c750e190a9a1d5263
 F test/bigfile.test aa74f4e5db51c8e54a1d9de9fa65d01d1eb20b59
 F test/bigfile2.test 1b489a3a39ae90c7f027b79110d6b4e1dbc71bfc
-F test/bigmmap.test b820c234daa56d24bc3bf006e3ac7aa9d9623c8ac656a38f59063b444a2d65d1
+F test/bigmmap.test 6021e205487347c6d7e5a541aa472a4b8efc4e9f4a3799a823b61a8e6616105d
 F test/bigrow.test f0aeb7573dcb8caaafea76454be3ade29b7fc747
 F test/bigsort.test 997e172009905873c06426145e4b3794c7dfe2d563724cb2fd39d45f319cf3d2
 F test/bind.test 1e136709b306f7ed3192d349c2930d89df6ab621654ad6f1a72381d3fe76f483
@@ -2055,8 +2055,8 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 80ff592a9d0157bfa8bd1f9959c3aa26cab0ec16fdccf7b58a7523b8912c1a8c
-R 9fc8bbf0b207a1cc6ac039fdbc6d6eb6
-U dan
-Z 4d1ed527dcff948fdbc54348f90ed739
+P fa68dd8928c76888d535e649794743eeefd3abe0f909792a128955710bfc948a
+R 81dc75decf21b6c20ce21839364a49f7
+U drh
+Z 7fd5d288edd0a6561b6b880883bae564
 # Remove this line to create a well-formed Fossil manifest.

manifest.uuid

@@ -1 +1 @@
-fa68dd8928c76888d535e649794743eeefd3abe0f909792a128955710bfc948a
+d39ffd2abadcc85c46ba17612f9f575005b4818e18bf39362b8ee574837cfad9

src/test2.c

@@ -521,6 +521,13 @@ static int SQLITE_TCLAPI fake_big_file(
     return TCL_ERROR;
   }
   if( Tcl_GetInt(interp, argv[1], &n) ) return TCL_ERROR;
+#if defined(_WIN32)
+  if( n>2 ){
+    Tcl_AppendResult(interp, "cannot create %dMB file because Windows "
+       "does not support sparse files", n);
+    return TCL_ERROR;
+  }
+#endif
 
   pVfs = sqlite3_vfs_find(0);
   nFile = (int)strlen(argv[2]);

test/bigmmap.test

@@ -52,7 +52,11 @@ do_execsql_test 1.0 {
 }
 
 for {set i 1} {$i < 8} {incr i} {
-  fake_big_file [expr $i*1024] [get_pwd]/test.db
+  if {[catch {fake_big_file [expr $i*1024] [get_pwd]/test.db}]} {
+    puts "Cannot create ${i}MB sparse file"
+    finish_test
+    return
+  }
   hexio_write test.db 28 [format %.8x [expr ($i*1024*1024*1024/4096) - 5]]
 
   do_execsql_test 1.$i "