possibly lost: 2,880 bytes in 10 blocks

無名小伙 2014-03-17 02:50:58



#include <iostream>

#include <pthread.h>

#include <vector>

using namespace std;



void* thread_func(void* args)

{

    return 0;

}



int main(int argc,char *argv[])

{

    if(argc!=2)

    {

        cout<<"Run with:"<<argv[0]<<" thread_count"<<endl;

        return -1;

    }

    unsigned int NUM_THREADS= atoi(argv[1]);

    pthread_t tids[NUM_THREADS];

    for(int i = 0; i < NUM_THREADS; ++i)

    {

        int ret = pthread_create(&tids[i], NULL, thread_func, NULL);

        if (ret != 0)

        {

                sleep(2);

           cout << "pthread_create error: error_code=" << ret << endl;

        }

    }

     pthread_exit(NULL);

}



==12919== Memcheck, a memory error detector

==12919== Copyright (C) 2002-2012, and GNU GPL'd, by Julian Seward et al.

==12919== Using Valgrind-3.8.0 and LibVEX; rerun with -h for copyright info

==12919== Command: /etc/SU/leak 10

==12919== Parent PID: 20231

==12919== 

==12919== 

==12919== HEAP SUMMARY:

==12919==     in use at exit: 2,880 bytes in 10 blocks

==12919==   total heap usage: 15 allocs, 5 frees, 5,384 bytes allocated

==12919== 

==12919== 2,880 bytes in 10 blocks are possibly lost in loss record 1 of 1

==12919==    at 0x4C266D5: calloc (vg_replace_malloc.c:593)

==12919==    by 0x4011892: _dl_allocate_tls (in /lib64/ld-2.12.so)

==12919==    by 0x4E35068: pthread_create@@GLIBC_2.2.5 (in /lib64/libpthread-2.12.so)

==12919==    by 0x400B62: main (in /leak)

==12919==    by 0x5809CDC: __libc_start_main (in /lib64/libc-2.12.so)

==12919==    by 0x400948: ??? (in /leak)

==12919==    by 0x7FF000737: ???

==12919==    by 0x1B: ???

==12919==    by 0x1: ???

==12919==    by 0x7FF0009DA: ???

==12919==    by 0x7FF0009E7: ???

==12919== 

==12919== LEAK SUMMARY:

==12919==    definitely lost: 0 bytes in 0 blocks

==12919==    indirectly lost: 0 bytes in 0 blocks

==12919==      possibly lost: 2,880 bytes in 10 blocks

==12919==    still reachable: 0 bytes in 0 blocks

==12919==         suppressed: 0 bytes in 0 blocks

==12919== 

==12919== For counts of detected and suppressed errors, rerun with: -v

==12919== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 0 from 0)