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| 1 /* | |
| 2 * Copyright (C) 2007 Apple Inc. All rights reserved. | |
| 3 * | |
| 4 * Redistribution and use in source and binary forms, with or without | |
| 5 * modification, are permitted provided that the following conditions | |
| 6 * are met: | |
| 7 * 1. Redistributions of source code must retain the above copyright | |
| 8 * notice, this list of conditions and the following disclaimer. | |
| 9 * 2. Redistributions in binary form must reproduce the above copyright | |
| 10 * notice, this list of conditions and the following disclaimer in the | |
| 11 * documentation and/or other materials provided with the distribution. | |
| 12 * | |
| 13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY | |
| 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR | |
| 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
| 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
| 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
| 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY | |
| 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 24 */ | |
| 25 | |
| 26 #import "config.h" | |
| 27 #import "ThreadCheck.h" | |
| 28 | |
| 29 #import <wtf/HashSet.h> | |
| 30 #import <wtf/StdLibExtras.h> | |
| 31 #include <wtf/text/StringHash.h> | |
| 32 | |
| 33 namespace WebCore { | |
| 34 | |
| 35 static bool didReadThreadViolationBehaviorFromUserDefaults = false; | |
| 36 static bool threadViolationBehaviorIsDefault = true; | |
| 37 static ThreadViolationBehavior threadViolationBehavior[MaximumThreadViolationRou
nd] = { RaiseExceptionOnThreadViolation, RaiseExceptionOnThreadViolation }; | |
| 38 | |
| 39 static void readThreadViolationBehaviorFromUserDefaults() | |
| 40 { | |
| 41 didReadThreadViolationBehaviorFromUserDefaults = true; | |
| 42 | |
| 43 ThreadViolationBehavior newBehavior = LogOnFirstThreadViolation; | |
| 44 NSString *threadCheckLevel = [[NSUserDefaults standardUserDefaults] stringFo
rKey:@"WebCoreThreadCheck"]; | |
| 45 if (!threadCheckLevel) | |
| 46 return; | |
| 47 | |
| 48 if ([threadCheckLevel isEqualToString:@"None"]) | |
| 49 newBehavior = NoThreadCheck; | |
| 50 else if ([threadCheckLevel isEqualToString:@"Exception"]) | |
| 51 newBehavior = RaiseExceptionOnThreadViolation; | |
| 52 else if ([threadCheckLevel isEqualToString:@"Log"]) | |
| 53 newBehavior = LogOnThreadViolation; | |
| 54 else if ([threadCheckLevel isEqualToString:@"LogOnce"]) | |
| 55 newBehavior = LogOnFirstThreadViolation; | |
| 56 else | |
| 57 ASSERT_NOT_REACHED(); | |
| 58 | |
| 59 threadViolationBehaviorIsDefault = false; | |
| 60 | |
| 61 for (unsigned i = 0; i < MaximumThreadViolationRound; ++i) | |
| 62 threadViolationBehavior[i] = newBehavior; | |
| 63 } | |
| 64 | |
| 65 void setDefaultThreadViolationBehavior(ThreadViolationBehavior behavior, ThreadV
iolationRound round) | |
| 66 { | |
| 67 ASSERT(round < MaximumThreadViolationRound); | |
| 68 if (round >= MaximumThreadViolationRound) | |
| 69 return; | |
| 70 if (!didReadThreadViolationBehaviorFromUserDefaults) | |
| 71 readThreadViolationBehaviorFromUserDefaults(); | |
| 72 if (threadViolationBehaviorIsDefault) | |
| 73 threadViolationBehavior[round] = behavior; | |
| 74 } | |
| 75 | |
| 76 void reportThreadViolation(const char* function, ThreadViolationRound round) | |
| 77 { | |
| 78 ASSERT(round < MaximumThreadViolationRound); | |
| 79 if (round >= MaximumThreadViolationRound) | |
| 80 return; | |
| 81 if (!didReadThreadViolationBehaviorFromUserDefaults) | |
| 82 readThreadViolationBehaviorFromUserDefaults(); | |
| 83 if (threadViolationBehavior[round] == NoThreadCheck) | |
| 84 return; | |
| 85 if (pthread_main_np()) | |
| 86 return; | |
| 87 WebCoreReportThreadViolation(function, round); | |
| 88 } | |
| 89 | |
| 90 } // namespace WebCore | |
| 91 | |
| 92 // Split out the actual reporting of the thread violation to make it easier to s
et a breakpoint | |
| 93 void WebCoreReportThreadViolation(const char* function, WebCore::ThreadViolation
Round round) | |
| 94 { | |
| 95 using namespace WebCore; | |
| 96 | |
| 97 ASSERT(round < MaximumThreadViolationRound); | |
| 98 if (round >= MaximumThreadViolationRound) | |
| 99 return; | |
| 100 | |
| 101 DEFINE_STATIC_LOCAL(HashSet<String>, loggedFunctions, ()); | |
| 102 switch (threadViolationBehavior[round]) { | |
| 103 case NoThreadCheck: | |
| 104 break; | |
| 105 case LogOnFirstThreadViolation: | |
| 106 if (loggedFunctions.add(function).isNewEntry) { | |
| 107 NSLog(@"WebKit Threading Violation - %s called from secondary th
read", function); | |
| 108 NSLog(@"Additional threading violations for this function will n
ot be logged."); | |
| 109 } | |
| 110 break; | |
| 111 case LogOnThreadViolation: | |
| 112 NSLog(@"WebKit Threading Violation - %s called from secondary thread
", function); | |
| 113 break; | |
| 114 case RaiseExceptionOnThreadViolation: | |
| 115 [NSException raise:@"WebKitThreadingException" format:@"%s was calle
d from a secondary thread", function]; | |
| 116 break; | |
| 117 } | |
| 118 } | |
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