试图创建流或fopen时程序崩溃

Program crashes trying to create ofstream or fopen

本文关键字：程序 崩溃 fopen 创建      更新时间：2023-10-16

我没有足够的信誉点来评论他们是否解决了这里最初提出的问题。我有同样的问题，程序崩溃的建设一个流。它不是多线程访问，但可以快速连续调用。我相信它在第二次崩溃了。我使用作用域来确保流对象被销毁。为什么会发生这种情况？

我也试过std:：fopen。它也会导致崩溃。

以下是使用流的代码：

static bool writeConfigFile (const char * filename, const Config & cfg)
{
logsPrintLine(_SLOG_SETCODE(_SLOGC_CONFIG, 0), _SLOG_INFO, "Write config file (%s stream)", filename);
ofstream os(filename); // FIXME: Crashes here creating ofstream 2nd time
if (os.good())
{
// Uses stream insertion operator to output attributes to stream 
// in human readable form (about 2kb)
outputConfig(cfg, os);
if (!os.good())
{
logsPrintLine(_SLOG_SETCODE(_SLOGC_CONFIG, 0), _SLOG_NOTICE, "Failed to write configuration file (%s)", filename);
return false;
}
logsPrintLine(_SLOG_SETCODE(_SLOGC_CONFIG, 0), _SLOG_INFO, "Configuration written to file (%s)", filename);
return true;
}
logsPrintLine(_SLOG_SETCODE(_SLOGC_CONFIG, 0), _SLOG_NOTICE, "Cannot write configuration file (%s)", filename);
return false;
}
/**
* Called when configuration settings have been read/received and validated
* @return true if successfully set, and written to file
*/
bool Config::set (SysConfigSource source, const struct SCADA_dsconfig * p)
{
Lock lock(mtxSet); // This is locking a mutex on construction of the lock. Release it on destruction.
// Setup the non-current one to switch to
Config * pCfg = pConfig.other();
unsigned i, f, n = 0;
// set attributes in pCfg based on the config received
// and some constants ...
pCfg->setWritten(writeConfigFile("test.conf", *pCfg));
if (!pCfg->isWritten())
{
// Don't set system config status here. Existing one still in use.
logsPrintLine(_SLOG_SETCODE(_SLOGC_CONFIG, 0), _SLOG_NOTICE, "Config file not written. Retain prior config.");
return false;
}
pConfig.swap(); // switch-in the new config
setSystemConfigSource(source);
toSyslog(pCfg);
notifyConfigChange();
return true;
}

也许发布一段源代码，以便了解哪里出了问题。

以下是关于如何使用fstream的一段非常基本的代码。。希望你会觉得它有帮助。

#include <iostream>
#include <fstream>
#include <string>
int main() {
while (1) {
std::string testString;
std::ofstream outFile;
outFile.open("Test", std::ios_base::app); // Appends to file, does not delete existing code
std::cout << "Enter a string: ";
std::cin >> testString;
outFile << testString << std::endl;
outFile.close();
}
}

原来是设备驱动程序总线主问题。在启动devb-ahci时添加"ahci-nobmstr"。

通过派生http://www.qnx.com/developers/docs/qnxcar2/index.jsp?topic=%2Fcom.qnx.doc.neutrino.user_guide%2Ftopic%2Fhardware_Troubleshooting_devb-eide.html

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