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Overview
Comment: | Enhance Thread.Abort protection and add a special test for it. Also, enhance the test suite infrastructure in support of this new test and fix comments in a related test file. |
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Downloads: | Tarball | ZIP archive |
Timelines: | family | ancestors | descendants | both | threadAbortProtect |
Files: | files | file ages | folders |
SHA1: |
6f81afd90062572bd178efd68df9de4b |
User & Date: | mistachkin 2012-10-12 11:28:10.815 |
Context
2012-10-12
| ||
13:40 | Logging related enhancements to stress test. check-in: 738abc1a0b user: mistachkin tags: threadAbortProtect | |
11:28 | Enhance Thread.Abort protection and add a special test for it. Also, enhance the test suite infrastructure in support of this new test and fix comments in a related test file. check-in: 6f81afd900 user: mistachkin tags: threadAbortProtect | |
04:23 | Add experimental protection against leaking native resources when the Thread.Abort method is used. These changes may not be included in any official release. check-in: e553cea4a0 user: mistachkin tags: threadAbortProtect | |
Changes
Changes to System.Data.SQLite/SQLiteBase.cs.
︙ | ︙ | |||
469 470 471 472 473 474 475 476 | } internal static string GetLastError(SQLiteConnectionHandle hdl, IntPtr db) { if ((hdl == null) || (db == IntPtr.Zero)) return "null connection or database handle"; #if PLATFORM_COMPACTFRAMEWORK | > > > > > > > > | | | | < | | | | | > | < > > > > | | > > > > > > > | | | | | | > > > > > > > > | | | | | | > > > > > > > > | | | | | | | | | | | | | | | > > > > > > > > > > | | | | | | | | < | | | > | | | | | | | | | > > > | | > > > > | > > > | | > > | > | < < > > | | > > > > > > > > > | | | | | | < > | | | 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 | } internal static string GetLastError(SQLiteConnectionHandle hdl, IntPtr db) { if ((hdl == null) || (db == IntPtr.Zero)) return "null connection or database handle"; string result = null; try { // do nothing. } finally /* NOTE: Thread.Abort() protection. */ { #if PLATFORM_COMPACTFRAMEWORK lock (hdl.syncRoot) #else lock (hdl) #endif { if (!hdl.IsInvalid && !hdl.IsClosed) { #if !SQLITE_STANDARD int len; result = UTF8ToString(UnsafeNativeMethods.sqlite3_errmsg_interop(db, out len), len); #else result = UTF8ToString(UnsafeNativeMethods.sqlite3_errmsg(db), -1); #endif } else { result = "closed or invalid connection handle"; } } } GC.KeepAlive(hdl); return result; } internal static void FinishBackup(SQLiteConnectionHandle hdl, IntPtr backup) { if ((hdl == null) || (backup == IntPtr.Zero)) return; try { // do nothing. } finally /* NOTE: Thread.Abort() protection. */ { #if PLATFORM_COMPACTFRAMEWORK lock (hdl.syncRoot) #else lock (hdl) #endif { #if !SQLITE_STANDARD SQLiteErrorCode n = UnsafeNativeMethods.sqlite3_backup_finish_interop(backup); #else SQLiteErrorCode n = UnsafeNativeMethods.sqlite3_backup_finish(backup); #endif if (n != SQLiteErrorCode.Ok) throw new SQLiteException(n, null); } } } internal static void FinalizeStatement(SQLiteConnectionHandle hdl, IntPtr stmt) { if ((hdl == null) || (stmt == IntPtr.Zero)) return; try { // do nothing. } finally /* NOTE: Thread.Abort() protection. */ { #if PLATFORM_COMPACTFRAMEWORK lock (hdl.syncRoot) #else lock (hdl) #endif { #if !SQLITE_STANDARD SQLiteErrorCode n = UnsafeNativeMethods.sqlite3_finalize_interop(stmt); #else SQLiteErrorCode n = UnsafeNativeMethods.sqlite3_finalize(stmt); #endif if (n != SQLiteErrorCode.Ok) throw new SQLiteException(n, null); } } } internal static void CloseConnection(SQLiteConnectionHandle hdl, IntPtr db) { if ((hdl == null) || (db == IntPtr.Zero)) return; try { // do nothing. } finally /* NOTE: Thread.Abort() protection. */ { #if PLATFORM_COMPACTFRAMEWORK lock (hdl.syncRoot) #else lock (hdl) #endif { #if !SQLITE_STANDARD SQLiteErrorCode n = UnsafeNativeMethods.sqlite3_close_interop(db); #else ResetConnection(hdl, db); SQLiteErrorCode n; try { n = UnsafeNativeMethods.sqlite3_close_v2(db); } catch (EntryPointNotFoundException) { n = UnsafeNativeMethods.sqlite3_close(db); } #endif if (n != SQLiteErrorCode.Ok) throw new SQLiteException(n, GetLastError(hdl, db)); } } } internal static bool ResetConnection(SQLiteConnectionHandle hdl, IntPtr db, bool canThrow) { if ((hdl == null) || (db == IntPtr.Zero)) return false; bool result = false; try { // do nothing. } finally /* NOTE: Thread.Abort() protection. */ { #if PLATFORM_COMPACTFRAMEWORK lock (hdl.syncRoot) #else lock (hdl) #endif { if (canThrow && hdl.IsInvalid) throw new InvalidOperationException("The connection handle is invalid."); if (canThrow && hdl.IsClosed) throw new InvalidOperationException("The connection handle is closed."); if (!hdl.IsInvalid && !hdl.IsClosed) { IntPtr stmt = IntPtr.Zero; SQLiteErrorCode n; do { stmt = UnsafeNativeMethods.sqlite3_next_stmt(db, stmt); if (stmt != IntPtr.Zero) { #if !SQLITE_STANDARD n = UnsafeNativeMethods.sqlite3_reset_interop(stmt); #else n = UnsafeNativeMethods.sqlite3_reset(stmt); #endif } } while (stmt != IntPtr.Zero); // // NOTE: Is a transaction NOT pending on the connection? // if (IsAutocommit(hdl, db)) { result = true; } else { n = UnsafeNativeMethods.sqlite3_exec( db, ToUTF8("ROLLBACK"), IntPtr.Zero, IntPtr.Zero, out stmt); if (n == SQLiteErrorCode.Ok) { result = true; } else if (canThrow) { throw new SQLiteException(n, GetLastError(hdl, db)); } } } } } GC.KeepAlive(hdl); return result; } internal static bool IsAutocommit(SQLiteConnectionHandle hdl, IntPtr db) { if ((hdl == null) || (db == IntPtr.Zero)) return false; bool result = false; try { // do nothing. } finally /* NOTE: Thread.Abort() protection. */ { #if PLATFORM_COMPACTFRAMEWORK lock (hdl.syncRoot) #else lock (hdl) #endif { if (!hdl.IsInvalid && !hdl.IsClosed) result = (UnsafeNativeMethods.sqlite3_get_autocommit(db) == 1); } } GC.KeepAlive(hdl); /* NOTE: Unreachable code. */ return result; } } internal interface ISQLiteSchemaExtensions { void BuildTempSchema(SQLiteConnection cnn); } |
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Changes to Tests/common.eagle.
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684 685 686 687 688 689 690 691 692 693 694 695 696 697 | proc isMemoryDb { fileName } { # # NOTE: Is the specified database file name really an in-memory database? # return [expr {$fileName eq ":memory:" || \ [string range $fileName 0 12] eq "file::memory:"}] } proc setupDb { fileName {mode ""} {dateTimeFormat ""} {dateTimeKind ""} {flags ""} {extra ""} {qualify true} {delete true} {uri false} {temporary true} {varName db} } { # # NOTE: First, see if our caller has requested an in-memory database. | > > > > > > > > > > > | 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 | proc isMemoryDb { fileName } { # # NOTE: Is the specified database file name really an in-memory database? # return [expr {$fileName eq ":memory:" || \ [string range $fileName 0 12] eq "file::memory:"}] } proc executeSql { sql {execute none} {fileName ""} } { if {[string length $fileName] == 0} then {set fileName :memory:} setupDb $fileName "" "" "" "" "" false false false false memDb try { return [sql execute -execute $execute $memDb $sql] } finally { cleanupDb $fileName memDb false false } } proc setupDb { fileName {mode ""} {dateTimeFormat ""} {dateTimeKind ""} {flags ""} {extra ""} {qualify true} {delete true} {uri false} {temporary true} {varName db} } { # # NOTE: First, see if our caller has requested an in-memory database. |
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821 822 823 824 825 826 827 | # set db [sql open -type SQLite [subst $connection]] # # NOTE: Configure the temporary directory for the newly opened database # connection now unless our caller forbids it. # | | | | 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 | # set db [sql open -type SQLite [subst $connection]] # # NOTE: Configure the temporary directory for the newly opened database # connection now unless our caller forbids it. # if {$temporary && ![info exists ::no(setTemporaryDirectory)]} then { sql execute $db [appendArgs \ "PRAGMA temp_store_directory = \"" [getTemporaryDirectory] \"\;] } # # NOTE: Always return the connection handle upon success. # return $db } |
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1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 | if {!$quiet} then { tputs $channel [appendArgs $memory \n] } } return $result } proc runSQLiteTestPrologue {} { # # NOTE: Skip running our custom prologue if the main one has been skipped. # if {![info exists ::no(prologue.eagle)]} then { # | > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > | 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 | if {!$quiet} then { tputs $channel [appendArgs $memory \n] } } return $result } proc checkForSQLiteDirectories { channel {reset false} } { # # NOTE: Check if the sqlite3_win32_set_directory function is available. # tputs $channel \ "---- checking for function sqlite3_win32_set_directory... " # # NOTE: This call to the sqlite3_win32_set_directory function uses the # invalid value 0 for the first argument. This code is designed # to check if calling the function will raise an exception (i.e. # the actual result of the function does not matter as long as no # directory is changed). # if {[catch { object invoke -flags +NonPublic \ System.Data.SQLite.UnsafeNativeMethods \ sqlite3_win32_set_directory 0 null}] == 0} then { # # NOTE: Calling the sqlite3_win32_set_directory function does not # cause an exception; therefore, it must be available (i.e. # even though it should return a failure return code in this # case). # addConstraint sqlite3_win32_set_directory tputs $channel yes\n # # NOTE: Does our caller want to reset the directories? # if {$reset} then { # # NOTE: Now make sure the database and temporary directories are # reset their default values, which should be null for both. # Since the sqlite3_win32_set_directory function is available, # use it. # for {set index 1} {$index < 3} {incr index} { if {[catch { object invoke -flags +NonPublic \ System.Data.SQLite.UnsafeNativeMethods \ sqlite3_win32_set_directory $index null} \ result] == 0} then { tputs $channel [appendArgs \ "---- call sqlite3_win32_set_directory(" $index \ ", null)... ok: " $result \n] } else { tputs $channel [appendArgs \ "---- call sqlite3_win32_set_directory(" $index \ ", null)... error: " \n\t $result \n] } } } } else { tputs $channel no\n # # NOTE: Does our caller want to reset the directories? # if {$reset} then { # # NOTE: Now make sure the database and temporary directories are # reset their default values, which should be null for both. # Since the sqlite3_win32_set_directory function does not # appear to be available, use the associated PRAGMA commands # instead. # foreach directory [list data_store_directory temp_store_directory] { set sql [appendArgs "PRAGMA " $directory " = \"\";"] if {[catch {executeSql $sql} result] == 0} then { tputs $channel [appendArgs \ "---- execute PRAGMA " $directory "... ok: " \ $result \n] } else { tputs $channel [appendArgs \ "---- execute PRAGMA " $directory "... error: " \ \n\t $result \n] } } } } # # NOTE: Finally, show the current value of the database and temporary # directories. # foreach directory [list data_store_directory temp_store_directory] { tputs $channel [appendArgs "---- checking " $directory "... "] set sql [appendArgs "PRAGMA " $directory \;] if {[catch {executeSql $sql scalar} result] == 0} then { tputs $channel [appendArgs "ok: \"" $result \"\n] } else { tputs $channel [appendArgs "error: " \n\t $result \n] } } } proc runSQLiteTestPrologue {} { # # NOTE: Skip running our custom prologue if the main one has been skipped. # if {![info exists ::no(prologue.eagle)]} then { # |
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1219 1220 1221 1222 1223 1224 1225 | # load without it; however, it cannot do anything useful without # it). If we are using the mixed-mode assembly and we already # found it (above), this should always succeed. # checkForSQLite $::test_channel # | < < < < | < < < < | < < < < < < < < < | < | 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 | # load without it; however, it cannot do anything useful without # it). If we are using the mixed-mode assembly and we already # found it (above), this should always succeed. # checkForSQLite $::test_channel # # NOTE: Check the SQLite database and temporary directories. # checkForSQLiteDirectories $::test_channel # # NOTE: Attempt to determine if the custom extension functions were # compiled into the SQLite interop assembly. # checkForSQLiteDefineConstant $::test_channel \ CHECK_STATE |
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Added Tests/thread.eagle.
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This # value must be at least two. The first test thread (at index 0) just # repeatedly calls the Thread.Abort() method on the other test threads # that appear to be alive until all test threads appear to be dead. All # other threads will attempt to open a connection, execute one or more # queries against it, and then close it. # set count 10 ############################################################################### runTest {test thread-1.1 {Thread.Abort() impact on native resources} -setup { setupDb [set fileName thread-1.1.db] tputs $test_channel [appendArgs \ "---- using a total of " $count " threads...\n"] } -body { sql execute $db { CREATE TABLE t1(x INTEGER PRIMARY KEY, y BLOB); INSERT INTO t1 (y) VALUES(RANDOMBLOB(1000)); INSERT INTO t1 (y) VALUES(RANDOMBLOB(1000)); INSERT INTO t1 (y) VALUES(RANDOMBLOB(1000)); INSERT INTO t1 (y) VALUES(RANDOMBLOB(1000)); INSERT INTO t1 (y) VALUES(RANDOMBLOB(1000)); } # # NOTE: The temporary directory must be reset here because it allocates # some SQLite memory and this test requires an extremely accurate # reading. # sql execute $db { PRAGMA temp_store_directory = ""; } # # NOTE: Close the database now, freeing any native SQLite memory and/or # resources that it may be using at this point; however, do not # actually delete the database file because it is needed in the C# # code for this test. # cleanupDb $fileName db true false false # # NOTE: Setup the variables used in the dynamically substituted C# code # for the main body of this test (below). # set id [object invoke Interpreter.GetActive NextId] set dataSource [file join [getDatabaseDirectory] $fileName] set sql { \ SELECT x, y FROM t1 ORDER BY x; \ } unset -nocomplain results errors set code [compileCSharpWith [subst { using System; using System.Collections.Generic; using System.Data.SQLite; using System.Diagnostics; using System.Threading; using Eagle._Containers.Public; namespace _Dynamic${id} { public static class Test${id} { public static IntList RunTestThreads() { // // NOTE: This is the total number of data bytes seen in the second // column of the query result rows seen by all test threads. // This value will vary greatly based upon how many loop // iterations are performed prior to each test thread being // aborted. // int sum = 0; // // NOTE: This is the total number of query result rows seen by all // the test threads. // int rows = 0; // // NOTE: This is the total number of exceptions caught by all the // test threads. // int errors = 0; // // NOTE: This is the total number of test threads to create. // int count = ${count}; // // NOTE: Create the array of thread objects. // Thread\[\] thread = new Thread\[count\]; // // NOTE: Create a random number generator suitable for waiting a // random number of milliseconds between each loop iteration // and then selecting a random thread index. // Random random = new Random(); // // NOTE: Create the event that will be used to synchronize all the // created threads so that they start doing their actual test // "work" at approximately the same time. This is also used // to make sure that all test threads are inside of a try // block before attempting to abort them. // using (ManualResetEvent goEvent = new ManualResetEvent(false)) { // // NOTE: Create a (reusable) delegate that will contain the code // that most of the created test threads are to execute. // This code will open, use, and close a single database // connection. Multiple commands and data readers will also // be used. // ThreadStart threadStart1 = delegate() { try { // // NOTE: Wait forever for the "GO" signal so that all threads // can start working at approximately the same time. // This is also used to make sure that all test threads // are inside of a try block before attempting to abort // them. // goEvent.WaitOne(); // // NOTE: Create a new connection object. We purposely avoid // putting this inside a "using" block to help test our // cleanup via the garbage collector. // SQLiteConnection connection = new SQLiteConnection( "Data Source=${dataSource};"); // // NOTE: Open the connection. After this point, native memory // and resources have been allocated by this thread. // connection.Open(); // // NOTE: Loop forever until the first thread signals us to stop // via calling Thread.Abort() method on our associated // thread object. // while (true) { // // NOTE: Create a dictionary to temporarily hold the values // from the data reader for this loop iteration. // Dictionary<long, byte\[\]> results = new Dictionary<long, byte\[\]>(); // // NOTE: Create a new command object using the connection // object for this thread. Again, avoid putting this // inside a "using" block to help test our cleanup via // the garbage collector. // SQLiteCommand command = new SQLiteCommand("${sql}", connection); // // NOTE: Execute the query and get the resulting data reader // object. Again, avoid putting this inside a "using" // block to help test our cleanup via the garbage // collector. // SQLiteDataReader reader = command.ExecuteReader(); // // NOTE: Start processing each available query result row. // This processing (or any of the above processing) // may be stopped at any time due to this test thread // being aborted. // while (reader.Read()) { results.Add((long)reader\["x"\], reader\["y"\] as byte\[\]); Interlocked.Add(ref sum, results\[(long)reader\["x"\]\].Length); Interlocked.Increment(ref rows); } // // NOTE: Close the data reader for this loop iteration as we // are done with it. // reader.Close(); reader = null; // // NOTE: Dispose the command for this loop iteration as we // are done with it. // command.Dispose(); command = null; } // // NOTE: Close the connection for this test thread as we are // done with it. Since the above loop is infinite, it // should only be exited via this test thread being // aborted; therefore, execution should never reach this // point. // connection.Close(); connection = null; } catch (Exception e) { Interlocked.Increment(ref errors); Trace.WriteLine(e); } }; // // NOTE: Create a (reusable) delegate that will contain the code // that half the created threads are to execute. This code // will repeatedly call the Thread.Abort() method on all the // other test threads until they all appear to be dead. // ThreadStart threadStart2 = delegate() { try { // // NOTE: Wait forever for the "GO" signal so that all threads // can start working at approximately the same time. // This is also used to make sure that all test threads // are inside of a try block before attempting to abort // them. // goEvent.WaitOne(); // // NOTE: Give the other test threads a slight head start to // make sure that they are fully alive prior to trying // to abort any of them. // Thread.Sleep(1000); // // NOTE: Loop forever until all test threads appear to be dead. // while (true) { // // NOTE: Wait a random number of milliseconds, up to a full // second. // Thread.Sleep(random.Next(0, 1000)); // // NOTE: Select a random thread to abort. // int index = random.Next(1, count); // // NOTE: If the thread appears to be alive, try to abort // it. // try { if (thread\[index\].IsAlive) thread\[index\].Abort(); } catch (Exception e) { Trace.WriteLine(e); } // // NOTE: If all the other threads are dead, presumably due // to being aborted, stop now. This check is simpler, // and possibly more reliable, than checking if any of // the test threads are still alive via their IsAlive // property. // if (Interlocked.Increment(ref errors) == count) break; else Interlocked.Decrement(ref errors); } } catch (Exception e) { Interlocked.Increment(ref errors); Trace.WriteLine(e); } }; // // NOTE: Create each of the test threads with a suitable stack // size. We must specify a stack size here because the // default one for the process would be the same as the // parent executable (the Eagle shell), which is 16MB, // too large to be useful. // for (int index = 0; index < count; index++) { // // NOTE: Figure out what kind of thread to create (i.e. one // that uses a connection or one that calls the GC). // ThreadStart threadStart; if (index == 0) threadStart = threadStart2; else threadStart = threadStart1; thread\[index\] = new Thread(threadStart, 1048576); // // NOTE: Name each thread for a better debugging experience. // thread\[index\].Name = String.Format( "[file rootname ${fileName}] #{0}", index); } // // NOTE: Start all the threads now. They should not actually do // any of the test "work" until we signal the event. // for (int index = 0; index < count; index++) thread\[index\].Start(); // // NOTE: Send the signal that all threads should start doing // their test "work" now. // goEvent.Set(); /* GO */ // // NOTE: Wait forever for each thread to finish its test "work" // and then die. // for (int index = 0; index < count; index++) thread\[index\].Join(); } // // NOTE: Return a list of integers with total number of data bytes // seen, total number of query result rows seen, and the total // number of exceptions caught by all the test threads. // IntList counts = new IntList(); counts.Add(sum); counts.Add(rows); counts.Add(errors); return counts; } /////////////////////////////////////////////////////////////////////// public static void Main() { // do nothing. } } } }] true true true results errors [list System.Data.SQLite.dll Eagle.dll]] list $code $results \ [expr {[info exists errors] ? $errors : ""}] \ [expr {$code eq "Ok" ? [catch { object invoke _Dynamic${id}.Test${id} RunTestThreads } result] : [set result ""]}] $result \ [collectGarbage $test_channel] \ [reportSQLiteResources $test_channel true] } -cleanup { unset -nocomplain result results errors code sql dataSource id db fileName } -constraints \ {eagle monoBug28 command.sql compile.DATA SQLite System.Data.SQLite} -match \ regexp -result [appendArgs "^Ok System#CodeDom#Compiler#CompilerResults#\\d+\ \\{\\} 0 \\{\\d+ \\d+ " $count "\\} \\{\\} " $memory_used \$]} ############################################################################### unset -nocomplain count ############################################################################### unset -nocomplain memory_used ############################################################################### runSQLiteTestEpilogue runTestEpilogue |
Changes to Tests/tkt-996d13cd87.eagle.
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122 123 124 125 126 127 128 | // created threads so that they start doing their actual test // "work" at approximately the same time. // using (ManualResetEvent goEvent = new ManualResetEvent(false)) { // // NOTE: Create a (reusable) delegate that will contain the code | | > | | | | | | 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 | // created threads so that they start doing their actual test // "work" at approximately the same time. // using (ManualResetEvent goEvent = new ManualResetEvent(false)) { // // NOTE: Create a (reusable) delegate that will contain the code // that most of the created test threads are going to // execute. The code in this delegate will create, open, // use, and close a single database connection with (or // without) pooling enabled. // ThreadStart threadStart1 = delegate() { try { // // NOTE: Wait forever for the "GO" signal so that all threads // can start working at approximately the same time. // goEvent.WaitOne(); // // NOTE: Try to create, open, and close a database connection // and then wait a random number of milliseconds before // doing it again. // Thread.Sleep(random.Next(0, 500)); SQLiteConnection connection = new SQLiteConnection( "Data Source=${dataSource};Pooling=${pooling};"); connection.Open(); |
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166 167 168 169 170 171 172 | Interlocked.Increment(ref errors); Trace.WriteLine(e); } }; // // NOTE: Create a (reusable) delegate that will contain the code | | > | | 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 | Interlocked.Increment(ref errors); Trace.WriteLine(e); } }; // // NOTE: Create a (reusable) delegate that will contain the code // that the garbage collection thread is to execute. The // code in this delegate will attempt to force a full round // of garbage collection several times. // ThreadStart threadStart2 = delegate() { try { // // NOTE: Wait forever for the "GO" signal so that all threads |
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