CreateProcess 方法以错误结束 [英] CreateProcess method ends up with an error

问题描述

我的以下代码有问题:

int main(int argc, char **argv) {
  PROCESS_INFORMATION pi;  
  STARTUPINFO si;     

  printf("Process %d reporting for duty
",GetCurrentProcessId());
  GetStartupInfo(&si);
  CreateProcess(NULL,"notepad.exe", NULL,NULL,FALSE,DETACHED_PROCESS, NULL,NULL, &si, &pi);
  printf("New Process ID: %d
",pi.dwProcessId);
  return(0);
}        

在运行时，我在调试时运行它，它在 CreateProcess 方法上崩溃，并显示以下错误消息:Tests.exe 中 0x7c82f29c 处的未处理异常:0xC0000005:访问冲突写入位置 0x00415760."什么意思???

And on the runing time,I ran this while debuggin and it crashes on the CreateProcess method,with this error message:" Unhandled exception at 0x7c82f29c in Tests.exe: 0xC0000005: Access violation writing location 0x00415760." What does it means???

推荐答案

32 位可执行文件的基地址总是 0x00400000.无法写入的地址，根据异常是0x00415760.这意味着您的代码几乎肯定会尝试写入可执行映像的只读部分.例如，当您尝试写入字符串文字时，就会发生这种情况.

32 bit executables invariably have a base address of 0x00400000. The address that cannot be written to, according to the exception is 0x00415760. Which means that your code is almost certainly trying to write to a read-only part of the executable image. That happens, for example, when you try to write to string literals.

现在，CreateProcess 必须是可修改的内存(它被声明为 LPTSTR).但是您正在传递一个字符串文字.将 "notepad.exe" 放入可修改的缓冲区中以解决您的问题.

Now, the second parameter to CreateProcess must be modifiable memory (it is declared as LPTSTR). But you are passing a string literal. Put "notepad.exe" in a modifiable buffer to solve your problem.

char CommandLine[] = "notepad.exe";
CreateProcess(NULL, CommandLine, ...

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