Macos NSSetUncaughtExceptionHandler不';我不能在mac上工作

Macos NSSetUncaughtExceptionHandler不';我不能在mac上工作,macos,cocoa,Macos,Cocoa,我的代码在这里: 在myAppDelegate.m中: void catchException(NSException *e) { NSLog( @"here is a exception"); } @implementation myAppDelegate { NSSetUncaughtExceptionHandler(&catchException); NSException *e = [[NSException alloc] initWithName: @

我的代码在这里:

myAppDelegate.m
中:

void catchException(NSException *e)
{
    NSLog( @"here is a exception");
}

@implementation myAppDelegate
{
    NSSetUncaughtExceptionHandler(&catchException);
    NSException *e = [[NSException alloc] initWithName: @"aException" reason: @"test" userInfo: nil];
    @throw e;
}

但是,函数catchException永远不会被捕获。有人能告诉我为什么吗?

我在自己的OSX代码中发现,为了可靠地捕获异常,我必须使用
NSExceptionHandler

#import <Cocoa/Cocoa.h>
#import <ExceptionHandling/NSExceptionHandler.h>
#import "CocoaUtil.h"
#import <execinfo.h>

// ExceptionDelegate
@interface ExceptionDelegate : NSObject
@end
static ExceptionDelegate * _exceptionDelegate = nil;

int main(int argc, const char **argv) {
    int retval = 1;

    @autoreleasepool
    {
        //
        // Set exception handler delegate
        //
        _exceptionDelegate = [[ExceptionDelegate alloc] init];
        NSExceptionHandler *exceptionHandler = [NSExceptionHandler defaultExceptionHandler];
        exceptionHandler.exceptionHandlingMask = NSLogAndHandleEveryExceptionMask;
        exceptionHandler.delegate = _exceptionDelegate;

        //
        // Set signal handling
        //
        int signals[] = {
            SIGQUIT, SIGILL, SIGTRAP, SIGABRT, SIGEMT, SIGFPE, SIGBUS, SIGSEGV,
            SIGSYS, SIGPIPE, SIGALRM, SIGXCPU, SIGXFSZ
        };
        const unsigned numSignals = sizeof(signals) / sizeof(signals[0]);
        struct sigaction sa;
        sa.sa_sigaction = signalHandler;
        sa.sa_flags = SA_SIGINFO;
        sigemptyset(&sa.sa_mask);
        for (unsigned i = 0; i < numSignals; i++)
            sigaction(signals[i], &sa, NULL);


        // Do work

    }   // @autoreleasepool

    return retval;
}

static void dumpStack(void **frames, unsigned numFrames) {
    char **frameStrings = backtrace_symbols(frames, numFrames);
    if (frameStrings) {
        for (unsigned i = 0; i < numFrames && frameStrings[i] ; i++)
            logbareutf8((char *)frameStrings[i]);
        free(frameStrings);
    } else {
        logerr(@"No frames to dump");
    }
}

static void signalHandler(int sig, siginfo_t *info, void *context) {
    logerr(@"Caught signal %d", sig);

    const size_t maxFrames = 128;
    void *frames[maxFrames];
    unsigned numFrames = backtrace(frames, maxFrames);
    dumpStack(frames, numFrames);

    bool send = criticalAlertPanel(@"Application Error",
        @"Upload logfile to support site",
        @"MyApp is terminating due to signal %d", sig);
    if (send)
        sendLogfile();

    exit(102);
}

static void sendLogfile() {
    // Redacted
}

@implementation ExceptionDelegate

- (BOOL)exceptionHandler:(NSExceptionHandler *)exceptionHandler
      shouldLogException:(NSException *)exception
                    mask:(NSUInteger)mask {

    logerr(@"An unhandled %@ exception occurred: %@", [exception name], [exception reason]);

    // [exception callStackReturnAddresses] will be empty, so parse the NSStackTraceKey from
    // [exception userInfo].
    NSString *stackTrace = [[exception userInfo] objectForKey:NSStackTraceKey];
    NSScanner *scanner = [NSScanner scannerWithString:stackTrace];
    NSMutableArray *addresses = [[NSMutableArray alloc] initWithCapacity:0];
    NSCharacterSet *whitespace = [NSCharacterSet whitespaceAndNewlineCharacterSet];
    NSString *token;
    while ([scanner scanUpToCharactersFromSet:whitespace
                                   intoString:&token]) {
        [addresses addObject:token];
    }

    NSUInteger numFrames = [addresses count];
    if (numFrames > 0) {
        void **frames = (void **)malloc(sizeof(void *) * numFrames);
        NSUInteger i, parsedFrames;

        for (i = 0, parsedFrames = 0; i < numFrames; i++) {
            NSString *address = [addresses objectAtIndex:i];

            if (![CocoaUtil parseString:address toVoidPointer:&frames[parsedFrames]]) {
                logerr(@"Failed to parse frame address '%@'", address);
                break;
            }

            parsedFrames++;
        }

        if (parsedFrames > 0) {
            logerr(@"Stack trace:");
            dumpStack(frames, (unsigned)parsedFrames);
        }

        free(frames);
    } else {
        logerr(@"No addresses in stacktrace");
    }

    return YES;
}

- (BOOL)exceptionHandler:(NSExceptionHandler *)exceptionHandler
   shouldHandleException:(NSException *)exception
                    mask:(NSUInteger)mask {

    bool send = criticalAlertPanel(@"Application Error",
        @"Upload logfile to support site",
        @"MyApp is terminating due to an unhandled exception:\n\n%@",
        [exception reason]);
    if (send)
        sendLogfile();

    exit(101);

    // not reached
    return NO;
}
#导入
#进口
#导入“CocoaUtil.h”
#进口
//例外公使
@接口例外Legate:NSObject
@结束
静态ExceptionLegate*_ExceptionLegate=nil;
int main(int argc,常量字符**argv){
int-retval=1;
@自动释放池
{
//
//设置异常处理程序委托
//
_exceptionDelegate=[[exceptionDelegate alloc]init];
NSExceptionHandler*exceptionHandler=[NSExceptionHandler defaultExceptionHandler];
exceptionHandler.exceptionHandlingMask=NSLogAndHandleEveryExceptionMask;
exceptionHandler.delegate=\u exceptionDelegate;
//
//设置信号处理
//
整数信号[]={
SIGQUIT、SIGILL、SIGTRAP、SIGABRT、SIGEMT、SIGFPE、SIGBUS、SIGSEGV、,
SIGSYS、SIGPIPE、SIGALRM、SIGXCPU、SIGXFSZ
};
const unsigned numSignals=sizeof(信号)/sizeof(信号[0]);
struct-sigaction-sa;
sa.sa_sigaction=信号处理器;
sa.sa_flags=sa_SIGINFO;
sigemptyset(和sa.sa_面具);
for(无符号i=0;i0){
void**frames=(void**)malloc(sizeof(void*)*numFrames);
nsui整数,解析的框架;
for(i=0,parsedFrames=0;i0){
logerr(@“堆栈跟踪:”);
转储堆栈(帧,(无符号)解析的帧);
}
自由(帧);
}否则{
logerr(@“stacktrace中没有地址”);
}
返回YES;
}
-(BOOL)exceptionHandler:(NSExceptionHandler*)exceptionHandler
shouldHandleException:(NSException*)异常
掩码:(整数)掩码{
bool send=criticalAlertPanel(@“应用程序错误”,
@“将日志文件上载到支持站点”,
@“由于未处理的异常,MyApp正在终止:\n\n%@”,
[例外原因];
如果(发送)
sendLogfile();
出口(101);
//未达到
返回否;
}

您需要导入特洛伊木马注意到的ExceptionHandling.framework

以下是清理堆栈跟踪打印的要点(某些功能缺失):


该代码无法编译。请提供将要编译的代码。我忘记了这一行:-(void)applicationdFinishLaunching:(NSNotification*)实现后的提示和结束