增加“ static int”会导致SIGSEGV SEGV

问题描述

| 我正在调试崩溃报告为：

Exception Type:  SIGSEGV
Exception Codes: SEGV_ACCERR

崩溃发生在执行ѭ1的行上。该应用程序使用ASIHTTP。我个人更喜欢使用NSURLConnection。如果请求失败，我永远不会自动重复对ѭ3的请求，因为我从未见过在不该请求时会失败。我宁愿给UI刷新按钮，还是显示带有按钮的“ 5”以重试一次或类似的操作。无论如何，为了与其他团队成员合作，我希望在不将ѭ2替换为ѭ3的情况下解决此问题。该请求正在以类似下面的内容开始：

- (void)getResources:(CLLocation *)location withQuery:(Nsstring *)query {
    NSURL *url = [NSURL URLWithString:[Nsstring stringWithString:@\"https://example.com/\"]];
    self.resourcesAPIRequest = [ASIFormDataRequest requestWithURL:url];
    [resourcesAPIRequest setPostValue:[Model instance].oauth_token forKey:@\"oauth_token\"];
    [resourcesAPIRequest setPostValue:[[NSNumber numberWithDouble:location.coordinate.latitude] stringValue] forKey:@\"latitude\"];
    [resourcesAPIRequest setPostValue:[[NSNumber numberWithDouble:location.coordinate.longitude] stringValue] forKey:@\"longitude\"];
    [resourcesAPIRequest setPostValue:query forKey:@\"query\"];
    [resourcesAPIRequest setDelegate:self];
    [resourcesAPIRequest setDidFinishSelector:@selector(resourcesAPIReturned:)];
    resourcesAPIRequest.userInfo = [NSDictionary dictionaryWithObjectsAndKeys:NsstringFromSelector(@selector(getResources:withQuery:)),@\"repeatSelector\",location,@\"argument1\",query,@\"argument2\",nil];   
    [resourcesAPIRequest startAsynchronous];
}

我注意到的一件事是，头文件中没有“ 9”，但是此回调方法仍称为OK：

#define maximumNumberOfFails 50

- (void)requestFailed:(ASIFormDataRequest *)request {
    static int numberOfFails = 0;

    if (numberOfFails < maximumNumberOfFails) {
        [NSThread sleepForTimeInterval:sleepTimeInSeconds];
        if ([request.userInfo objectForKey:@\"argument2\"]) {
            [self performSelector:NSSelectorFromString([request.userInfo objectForKey:@\"repeatSelector\"]) withObject:[request.userInfo objectForKey:@\"argument1\"] withObject:[request.userInfo objectForKey:@\"argument2\"]];
        } else if ([request.userInfo objectForKey:@\"argument1\"]) {
            [self performSelector:NSSelectorFromString([request.userInfo objectForKey:@\"repeatSelector\"]) withObject:[request.userInfo objectForKey:@\"argument1\"]];
        } else {
            [self performSelector:NSSelectorFromString([request.userInfo objectForKey:@\"repeatSelector\"])];
        }
        numberOfFails++;
    } else {
        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@\"Problem\" message:@\"There was a problem connecting to the servers.  Please make sure you have an Internet connection.\" delegate:nil cancelButtonTitle:@\"Ok\" otherButtonTitles:nil];
        [alert show];
        [alert release];
        numberOfFails = 0;
    }
}

另外，我认为static int numberOfFails应该是static NSUInteger numberOfFails。而且，我注意到请求始于ѭ13started。 static int numberOfFails是原子的吗？这就是为什么我们会收到错误“ 15”（映射对象的权限无效）的原因。有什么想法吗？

解决方法

该问题可能与您的静态变量无关。 requestFailed:是在主线程还是在后台线程上执行？如果它在后台线程上，则需要使用performSelectorOnMainThread:withObject:。如果它在主线程上，则可能需要在运行循环之前执行一次新的HTTP请求。为此，请使用performSelector:withObject:afterDelay:，并将\'0.0 \'用作延迟。您会注意到，这两种方法都只允许使用一个方法参数。通常，您在ѭ19中传递参数，而不是像执行操作那样尝试事先解析出参数数量。

int int sigsegv static 增加导致

增加“ static int”会导致SIGSEGV SEGV_ACCERR

问题描述

解决方法