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// Opens the database used in this test case
function openTestDatabase()
{
return openDatabaseWithSuffix("OpenDatabaseWhileTransactionInProgressTest",
"1.0",
"Test to make sure that calling openDatabase() while a transaction is in progress on a different handle to the same database does not result in a deadlock.",
2100000); // 2MB + epsilon
}
// See https://bugs.webkit.org/show_bug.cgi?id=28207
// In order to trigger this bug, the transaction must acquire an exclusive
// lock on the DB file before trying to obtain a second handle to the same DB.
// The only way to force SQLite to obtain an exclusive lock is to change more
// than cache_size * page_size bytes in the database. The default value for
// cache_size is 2000 pages, and the default page_size is 1024 bytes. So the
// size of the blob must be at least 2MB.
function runTest()
{
var db1 = openTestDatabase();
db1.transaction(function(tx) {
// Create the Test table if it does not exist
tx.executeSql("CREATE TABLE IF NOT EXISTS Test (Foo BLOB);");
tx.executeSql("INSERT INTO Test VALUES (ZEROBLOB(2097152));", [],
function(result) {
var db2 = openTestDatabase();
log("openDatabase() succeeded.");
},
function(tx, error) {
log("Executing statement failed: " + error.message);
});
// Clean up the DB to allow for repeated runs of this test
// without needing to increase the default allowed quota (5MB)
tx.executeSql("DELETE FROM Test;");
}, function(error) {
log("Transaction failed: " + error.message);
}, function() {
if (window.layoutTestController)
layoutTestController.notifyDone();
});
}
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