/*
* 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 <JavaScriptCore/HashSet.h>
namespace WebCore {
static ThreadViolationBehavior defaultThreadViolationBehavior = RaiseExceptionOnThreadViolation;
static bool didReadThreadViolationBehaviorFromUserDefaults = false;
static bool threadViolationBehaviorIsDefault;
static ThreadViolationBehavior threadViolationBehavior;
static void readThreadViolationBehaviorFromUserDefaults()
{
NSString *threadCheckLevel = [[NSUserDefaults standardUserDefaults] stringForKey:@"WebCoreThreadCheck"];
if ([threadCheckLevel isEqualToString:@"None"])
threadViolationBehavior = NoThreadCheck;
else if ([threadCheckLevel isEqualToString:@"Exception"])
threadViolationBehavior = RaiseExceptionOnThreadViolation;
else if ([threadCheckLevel isEqualToString:@"Log"])
threadViolationBehavior = LogOnThreadViolation;
else if ([threadCheckLevel isEqualToString:@"LogOnce"])
threadViolationBehavior = LogOnFirstThreadViolation;
else {
threadViolationBehavior = defaultThreadViolationBehavior;
threadViolationBehaviorIsDefault = true;
}
didReadThreadViolationBehaviorFromUserDefaults = true;
}
void setDefaultThreadViolationBehavior(ThreadViolationBehavior behavior)
{
defaultThreadViolationBehavior = behavior;
if (threadViolationBehaviorIsDefault)
threadViolationBehavior = behavior;
}
void reportThreadViolation(const char* function)
{
if (!didReadThreadViolationBehaviorFromUserDefaults)
readThreadViolationBehaviorFromUserDefaults();
if (threadViolationBehavior == NoThreadCheck)
return;
if (pthread_main_np())
return;
WebCoreReportThreadViolation(function);
}
} // namespace WebCore
// Split out the actual reporting of the thread violation to make it easier to set a breakpoint
void WebCoreReportThreadViolation(const char* function)
{
using namespace WebCore;
static HashSet<String> loggedFunctions;
switch (threadViolationBehavior) {
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;
}
}