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Overview
Comment:Set a reasonable limit on the number of opcodes in a prepared statement for ossfuzz.c. This should prevent timeouts in OSS-Fuzz when it generates totally unreasonable queries.
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SHA3-256: f74899ed2c78019abb406432a74dcd42a0ff8d9add005f8544dc4a8905f232eb
User & Date: drh 2017-03-17 22:51:28
Context
2017-03-17
23:08
Fix an error in the newly revised documentation for SQLITE_LIMIT_VDBE_OP. No changes to code. check-in: f4cf8635 user: drh tags: trunk
22:51
Set a reasonable limit on the number of opcodes in a prepared statement for ossfuzz.c. This should prevent timeouts in OSS-Fuzz when it generates totally unreasonable queries. check-in: f74899ed user: drh tags: trunk
22:50
Begin enforcing the SQLITE_LIMIT_VDBE_OP. The documentation warned that this day might come. check-in: ef591461 user: drh tags: trunk
Changes
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Changes to test/ossfuzz.c.

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  ** (which will block further processing) if more than 10 seconds have
  ** elapsed since the start of the test.
  */
  cx.iLastCb = timeOfDay();
  cx.iCutoffTime = cx.iLastCb + 10000;  /* Now + 10 seconds */
  sqlite3_progress_handler(cx.db, 10, progress_handler, (void*)&cx);
#endif




  /* Bit 1 of the selector enables foreign key constraints */
  sqlite3_db_config(cx.db, SQLITE_DBCONFIG_ENABLE_FKEY, uSelector&1, &rc);
  uSelector >>= 1;

  /* Remaining bits of the selector determine a limit on the number of
  ** output rows */







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  ** (which will block further processing) if more than 10 seconds have
  ** elapsed since the start of the test.
  */
  cx.iLastCb = timeOfDay();
  cx.iCutoffTime = cx.iLastCb + 10000;  /* Now + 10 seconds */
  sqlite3_progress_handler(cx.db, 10, progress_handler, (void*)&cx);
#endif

  /* Set a limit on the maximum size of a prepared statement */
  sqlite3_limit(cx.db, SQLITE_LIMIT_VDBE_OP, 25000);

  /* Bit 1 of the selector enables foreign key constraints */
  sqlite3_db_config(cx.db, SQLITE_DBCONFIG_ENABLE_FKEY, uSelector&1, &rc);
  uSelector >>= 1;

  /* Remaining bits of the selector determine a limit on the number of
  ** output rows */