访问我以前可以访问的功能时出现分段错误

Question

我正在尝试访问一个函数来检查条件，但是尽管起初我可以访问它，但经过几次迭代后，我得到了分割错误。我已经包含了一些WriteLogs来查看函数的返回值是什么。

这是我能够访问该功能的四次之一：

[Fri Jan 10 12:40:25:889]: [INFO][RouteInfoManager::UpdateRouteStatus] Driving Mode 2 passengers 0
[Fri Jan 10 12:40:25:889]: [INFO][RouteInfoManager::UpdateRouteStatus] IsAsva 1
[Fri Jan 10 12:40:26:060]: [INFO][DatasetParam::Int] DatasetParam_TypeException, setting speaker_gain
[Fri Jan 10 12:40:26:063]: [INFO][DatasetParam::Int] DatasetParam_TypeException, setting speaker_gain
[Fri Jan 10 12:40:26:175]: [INFO][DatasetParam::Str] DatasetParam_TypeException, setting cpu_version

而这个，分割错误错误：

[Fri Jan 10 12:40:26:901]: [INFO][RouteInfoManager::UpdateRouteStatus] Driving Mode 2 passengers 0
[Thread 0xaa3ebb40 (LWP 27594) exited]
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0xa0f49b40 (LWP 27661)]
0x086d0273 in AlstomMP14::RouteInfoManager::UpdateRouteStatus (this=0x90889e8) at ../src/route/RouteInfoManager.cpp:283
283     WriteLog("[RouteInfoManager::UpdateRouteStatus] IsAsva %d", audioInfoProvider->IsAsvaAuthorisedInTrainCA());

这些是写入日志：

WriteLog("[RouteInfoManager::UpdateRouteStatus] Driving Mode %d passengers %d", trainDataProvider->GetDrivingMode(), trainDataProvider->GetDrivingMode() != DRIVING_MODE_AUTOMATIC
|| trainDataProvider->IsTrainWithoutPassengers());
WriteLog("[RouteInfoManager::UpdateRouteStatus] IsAsva %d", audioInfoProvider->IsAsvaAuthorisedInTrainCA());

这些功能涉及：

bool AudioManager::IsAsvaAuthorisedInTrainCA() {
/// 1) Return true if train CA is without passengers and driving mode is automatic.
return (!IsTrainCAWithoutPassengers() && trainDataProvider->GetDrivingMode() == DRIVING_MODE_AUTOMATIC);
}
bool AudioManager::IsTrainCAWithoutPassengers() {
/// 1) Return true if driving mode is not automatic and train is without passengers.
return (trainDataProvider->GetDrivingMode() != DRIVING_MODE_AUTOMATIC
|| trainDataProvider->IsTrainWithoutPassengers());
}

如您所见，WriteLogs 显示了 IsTrainCAWithoutPassengers(( 函数的返回，这是 IsAsvaAuthorisedInTrainCA(( 函数的条件之一。

我不明白为什么，每次(2 和 0(都有相同的值，有时我可以访问 IsAsvaAuthorisedInTrainCA((，有时我得到分段错误。

Answer 1

WriteLog("[RouteInfoManager::UpdateRouteStatus] IsAsva %d", audioInfoProvider->IsAsvaAuthorisedInTrainCA());

假设WriteLog的工作方式类似于printf(或转发到printf(，您的格式说明符与参数不匹配。

%d是为了int，而不是bool。

程序具有未定义的行为。

坚持一个石膏来int.