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Diffstat (limited to 'Source/WebCore/platform/mac/ThreadCheck.mm')
-rw-r--r-- | Source/WebCore/platform/mac/ThreadCheck.mm | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/Source/WebCore/platform/mac/ThreadCheck.mm b/Source/WebCore/platform/mac/ThreadCheck.mm new file mode 100644 index 0000000..4792191 --- /dev/null +++ b/Source/WebCore/platform/mac/ThreadCheck.mm @@ -0,0 +1,118 @@ +/* + * Copyright (C) 2007 Apple Inc. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#import "config.h" +#import "ThreadCheck.h" + +#import <wtf/HashSet.h> +#import <wtf/StdLibExtras.h> +#include <wtf/text/StringHash.h> + +namespace WebCore { + +static bool didReadThreadViolationBehaviorFromUserDefaults = false; +static bool threadViolationBehaviorIsDefault = true; +static ThreadViolationBehavior threadViolationBehavior[MaximumThreadViolationRound] = { RaiseExceptionOnThreadViolation, RaiseExceptionOnThreadViolation }; + +static void readThreadViolationBehaviorFromUserDefaults() +{ + didReadThreadViolationBehaviorFromUserDefaults = true; + + ThreadViolationBehavior newBehavior = LogOnFirstThreadViolation; + NSString *threadCheckLevel = [[NSUserDefaults standardUserDefaults] stringForKey:@"WebCoreThreadCheck"]; + if (!threadCheckLevel) + return; + + if ([threadCheckLevel isEqualToString:@"None"]) + newBehavior = NoThreadCheck; + else if ([threadCheckLevel isEqualToString:@"Exception"]) + newBehavior = RaiseExceptionOnThreadViolation; + else if ([threadCheckLevel isEqualToString:@"Log"]) + newBehavior = LogOnThreadViolation; + else if ([threadCheckLevel isEqualToString:@"LogOnce"]) + newBehavior = LogOnFirstThreadViolation; + else + ASSERT_NOT_REACHED(); + + threadViolationBehaviorIsDefault = false; + + for (unsigned i = 0; i < MaximumThreadViolationRound; ++i) + threadViolationBehavior[i] = newBehavior; +} + +void setDefaultThreadViolationBehavior(ThreadViolationBehavior behavior, ThreadViolationRound round) +{ + ASSERT(round < MaximumThreadViolationRound); + if (round >= MaximumThreadViolationRound) + return; + if (!didReadThreadViolationBehaviorFromUserDefaults) + readThreadViolationBehaviorFromUserDefaults(); + if (threadViolationBehaviorIsDefault) + threadViolationBehavior[round] = behavior; +} + +void reportThreadViolation(const char* function, ThreadViolationRound round) +{ + ASSERT(round < MaximumThreadViolationRound); + if (round >= MaximumThreadViolationRound) + return; + if (!didReadThreadViolationBehaviorFromUserDefaults) + readThreadViolationBehaviorFromUserDefaults(); + if (threadViolationBehavior[round] == NoThreadCheck) + return; + if (pthread_main_np()) + return; + WebCoreReportThreadViolation(function, round); +} + +} // namespace WebCore + +// Split out the actual reporting of the thread violation to make it easier to set a breakpoint +void WebCoreReportThreadViolation(const char* function, WebCore::ThreadViolationRound round) +{ + using namespace WebCore; + + ASSERT(round < MaximumThreadViolationRound); + if (round >= MaximumThreadViolationRound) + return; + + DEFINE_STATIC_LOCAL(HashSet<String>, loggedFunctions, ()); + switch (threadViolationBehavior[round]) { + case NoThreadCheck: + break; + case LogOnFirstThreadViolation: + if (loggedFunctions.add(function).second) { + NSLog(@"WebKit Threading Violation - %s called from secondary thread", function); + NSLog(@"Additional threading violations for this function will not be logged."); + } + break; + case LogOnThreadViolation: + NSLog(@"WebKit Threading Violation - %s called from secondary thread", function); + break; + case RaiseExceptionOnThreadViolation: + [NSException raise:@"WebKitThreadingException" format:@"%s was called from a secondary thread", function]; + break; + } +} |