Valgrind 报告 "brk segment overflow in thread #1"

Question

我想知道这条消息意味着什么：

==18151== brk segment overflow in thread #1: can't grow to 0x4a26000

请注意，代码运行良好并且输出正确。我应该忽略这条消息吗？这是什么意思？

Answer 1

我觉得你可以忽略它。我在一些似乎运行良好的代码中的新分配中收到了消息，我还在以下代码中收到了消息：

#include <vector>

struct Something
{
    Something() : a1(0), b1(0) { }
    unsigned short a1;
    unsigned short b1;
};

const int allocsize = 10000;

struct Tester
{
   Tester()
   {
       for (int u = 0; u < allocsize; ++u)
           data.push_back(new Something[519]);
   }

   ~Tester()
   {
       for (int u = 0; u < allocsize; ++u)
           delete[] (data[u]);
   }

   std::vector<Something*> data;
};

void test()
{
     Tester t;
     // while (true) {;}
}

int main()
{
    test();
    return 0; 
}

我也注意到其他人也遇到了同样的问题：

Valgrind reporting a segment overflow

Valgrind 报告 "brk segment overflow in thread #1"

Valgrind reporting "brk segment overflow in thread #1"

c++

valgrind