使用setrlimit增加Linux中的堆栈大小 [英] Increase stack size in Linux with setrlimit

问题描述

阅读有关如何在编译时增加使用gnu编译的c ++应用程序的堆栈大小的信息，我了解可以在程序开始时使用setrlimit完成此操作.但是，我找不到任何成功的示例来说明如何使用它，以及在程序的哪一部分中应用它以便为c ++程序获得64M的堆栈大小，有人可以帮助我吗?

reading information about how to increase stack size for a c++ application compiled with gnu, at compilation time, I understood that it can be done with setrlimit at the beginning of the program. Nevertheless I could not find any successful example on how to use it and in which part of the program apply it in order to get a 64M stack size for a c++ program, could anybody help me?

感谢

推荐答案

通常，在调用任何其他函数之前，通常应尽早(例如，在main()的开头)设置堆栈大小.通常，逻辑为:

Normally you would set the stack size early on, e,g, at the start of main(), before calling any other functions. Typically the logic would be:

• 调用 getrlimit 以获得当前堆栈大小
• 如果当前大小<然后需要所需的堆栈大小
  • 调用 setrlimit 将堆栈大小增加到所需大小
  • call getrlimit to get current stack size
  • if current size < required stack size then
    • call setrlimit to increase stack size to required size

    在C语言中，可能会这样编码:

    In C that might be coded something like this:

    #include <sys/resource.h>
    #include <stdio.h>
    
    int main (int argc, char **argv)
    {
        const rlim_t kStackSize = 64L * 1024L * 1024L;   // min stack size = 64 Mb
        struct rlimit rl;
        int result;
    
        result = getrlimit(RLIMIT_STACK, &rl);
        if (result == 0)
        {
            if (rl.rlim_cur < kStackSize)
            {
                rl.rlim_cur = kStackSize;
                result = setrlimit(RLIMIT_STACK, &rl);
                if (result != 0)
                {
                    fprintf(stderr, "setrlimit returned result = %d\n", result);
                }
            }
        }
    
        // ...
    
        return 0;
    }
    

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