/* | |
* 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 "StringHash.h" | |
#import <wtf/HashSet.h> | |
#import <wtf/StdLibExtras.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; | |
} | |
} |