In the OSSFuzz test module, invoke the progress handler much more frequently

so that timeouts are detected punctually even if the test script is running
opcodes that individually take a long time (for example, an OP_Function opcode
that invokes "randomblob(1.5e6)").

FossilOrigin-Name: f3b6959c04c4ef7b8ff03582b867012a869d52b4a90a0d7ab079ee4c21be5464

manifest

@@ -1,5 +1,5 @@
-C Fix\sa\spossible\sNULL\spointer\sdereference\sin\sfollowing\san\sOOM\serror\nin\ssqlite3ExprIsInteger().\sProblem\sfound\sby\sOSS-Fuzz.
-D 2017-03-12T20:28:44.701
+C In\sthe\sOSSFuzz\stest\smodule,\sinvoke\sthe\sprogress\shandler\smuch\smore\sfrequently\nso\sthat\stimeouts\sare\sdetected\spunctually\seven\sif\sthe\stest\sscript\sis\srunning\nopcodes\sthat\sindividually\stake\sa\slong\stime\s(for\sexample,\san\sOP_Function\sopcode\nthat\sinvokes\s"randomblob(1.5e6)").
+D 2017-03-13T13:45:29.519
 F Makefile.in 2dae2a56457c2885425a480e1053de8096aff924
 F Makefile.linux-gcc 7bc79876b875010e8c8f9502eb935ca92aa3c434
 F Makefile.msc 9020fa41eb91f657ae0cc44145d0a2f3af520860
@@ -1006,7 +1006,7 @@ F test/orderby7.test 3d1383d52ade5b9eb3a173b3147fdd296f0202da
 F test/orderby8.test 23ef1a5d72bd3adcc2f65561c654295d1b8047bd
 F test/orderby9.test 87fb9548debcc2cd141c5299002dd94672fa76a3
 F test/oserror.test b32dc34f2363ef18532e3a0a7358e3e7e321974f
-F test/ossfuzz.c f04b9f236e51d4db701bdebe8ac01318c83102a8
+F test/ossfuzz.c 6dc75478809cfbd4609409a87179ddc2ffaa092e8adb27c1982c5a944a7dd81f
 F test/ossshell.c d9f1a6f43e7bab45d6be857a5800f5d4a1861db3
 F test/ovfl.test 199c482696defceacee8c8e0e0ef36da62726b2f
 F test/pager1.test 841868017e9dd3cb459b8d78862091a7d9cff21d
@@ -1562,7 +1562,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 18bf6aca2ac86478fd12d5020f3a41cfd2bd2dc3defe2298411f79ad308a6f73
-R ca6b9859462ac91c5f6d6ceb39023c31
+P 5ec655e8e817c1ed3bfb2e576745a7cef441494ad7baf1bf9f8895e98ac19c5a
+R 5ec7c17c414d77e4ccd9fef1ac3d681c
 U drh
-Z af1824315a47164e92b4aa40f4d2923c
+Z 5b49012ad9ab98ef47d2e1e6f7e9b1e7

manifest.uuid

@@ -1 +1 @@
-5ec655e8e817c1ed3bfb2e576745a7cef441494ad7baf1bf9f8895e98ac19c5a
+f3b6959c04c4ef7b8ff03582b867012a869d52b4a90a0d7ab079ee4c21be5464

test/ossfuzz.c

@@ -77,11 +77,13 @@ int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   if( rc ) return 0;
 
 #ifndef SQLITE_OMIT_PROGRESS_CALLBACK
-  /* Invoke the progress handler every 500 thousand instructions (approximately
-  ** 20 to 40 times per second) to check to see if we are taking too long.
+  /* Invoke the progress handler frequently to check to see if we
+  ** are taking too long.  The progress handler will return true
+  ** (which will block further processing) if more than 10 seconds have
+  ** elapsed since the start of the test.
   */
   iCutoff = timeOfDay() + 10000;  /* Now + 10 seconds */
-  sqlite3_progress_handler(db, 500000, progress_handler, (void*)&iCutoff);
+  sqlite3_progress_handler(db, 10, progress_handler, (void*)&iCutoff);
 #endif
 
   /* Bit 1 of the selector enables foreign key constraints */