iOS Crash閃退資訊捕獲工具類

iOS Crash閃退資訊捕獲工具類

IOS SDK中提供了一個現成的函數 NSSetUncaughtExceptionHandler 用來做異常處理，但功能非常有限，而引起崩潰的大多數原因如：記憶體訪問錯誤，重複釋放等錯誤捕獲不到，因為這些異常拋出的是Signal，所以必須要專門做Signal處理。工具類的實現源碼如下：

標頭檔

#import extern NSString *const UncaughtExceptionHandlerSignalKey;extern NSString *const SingalExceptionHandlerAddressesKey;extern NSString *const ExceptionHandlerAddressesKey;@interface ExceptionHandler : NSObject+ (void)installExceptionHandler;+ (NSArray *)backtrace;@end

實現檔案

#import "ExceptionHandler.h"#include #include NSString *const UncaughtExceptionHandlerSignalKey = @"UncaughtExceptionHandlerSignalKey";NSString *const SingalExceptionHandlerAddressesKey = @"SingalExceptionHandlerAddressesKey";NSString *const ExceptionHandlerAddressesKey = @"ExceptionHandlerAddressesKey";const int32_t _uncaughtExceptionMaximum = 20;// 系統訊號截獲處理方法void signalHandler(int signal);// 異常截獲處理方法void exceptionHandler(NSException *exception);void signalHandler(int signal){    volatile int32_t _uncaughtExceptionCount = 0;    int32_t exceptionCount = OSAtomicIncrement32(&_uncaughtExceptionCount);    // 如果太多不用處理    if (exceptionCount > _uncaughtExceptionMaximum) {        return;    }        // 擷取資訊    NSMutableDictionary *userInfo = [NSMutableDictionary dictionaryWithObject:[NSNumber numberWithInt:signal] forKey:UncaughtExceptionHandlerSignalKey];    NSArray *callStack = [ExceptionHandler backtrace];    [userInfo  setObject:callStack  forKey:SingalExceptionHandlerAddressesKey];    // 現在就可以儲存資訊到本地［］    }void exceptionHandler(NSException *exception){    volatile int32_t _uncaughtExceptionCount = 0;    int32_t exceptionCount = OSAtomicIncrement32(&_uncaughtExceptionCount);        // 如果太多不用處理    if (exceptionCount > _uncaughtExceptionMaximum) {        return;    }        NSArray *callStack = [ExceptionHandler backtrace];    NSMutableDictionary *userInfo =[NSMutableDictionary dictionaryWithDictionary:[exception userInfo]];    [userInfo setObject:callStack forKey:ExceptionHandlerAddressesKey];    NSLog(@"Exception Invoked: %@", userInfo);        // 現在就可以儲存資訊到本地［］        }@implementation ExceptionHandler//擷取呼叫堆疊+ (NSArray *)backtrace{    void* callstack[128];    int frames = backtrace(callstack, 128);    char **strs = backtrace_symbols(callstack,frames);        NSMutableArray *backtrace = [NSMutableArray arrayWithCapacity:frames];    for (int i=0;i<frames;i++) {        [backtrace addObject:[NSString stringWithUTF8String:strs[i]]];    }    free(strs);    return backtrace;}// 註冊崩潰攔截+ (void)installExceptionHandler{    NSSetUncaughtExceptionHandler(&exceptionHandler);    signal(SIGHUP, signalHandler);    signal(SIGINT, signalHandler);    signal(SIGQUIT, signalHandler);    signal(SIGABRT, signalHandler);    signal(SIGILL, signalHandler);    signal(SIGSEGV, signalHandler);    signal(SIGFPE, signalHandler);    signal(SIGBUS, signalHandler);    signal(SIGPIPE, signalHandler);}@end