为什么gdb命令信息线程给出了2个线程899 0x00000000？ （）

Question

我想用gdb来调试核心转储。它与x86机器（ubuntu 12.04）工作正常但是我使用arm编译器为arm编译了相同的源代码并尝试获取“info thred”。但是在这种情况下x86机器（ubuntu 12.04），它给出了正确的结果但是在arm的情况下它没有给出线程内存地址。我已经按照以下步骤。

gdb线程核心

gdb＆gt;信息主题

其中“thread”是二进制文件名，“core”是核心转储文件名。

#include <stdio.h>
#include <pthread.h>
#include <unistd.h>
#include<sys/types.h>
#include <sys/resource.h>
#include<string.h>
pthread_t thread;

struct rlimit rl;

void* thread3 (void* d)
{
  int count3 = 0;

  while(count3 < 10){
    printf("Thread 3: %d\n", count3++);
    printf("Thread3: %ld\n",pthread_self());
  }
  return NULL;
}

void* thread2 (void* d)
{
  int count2 = 0;
        char *buff=NULL;
    rl.rlim_cur = 10000000;
    rl.rlim_max = RLIM_INFINITY;
    setrlimit(RLIMIT_CORE, &rl);

  while(count2 < 10){
    printf("Thread 2: %d\n", count2++);
    printf("Thread2: %ld\n",pthread_self());
  }
        strcpy(buff,"Creating SIGSEGV interrupt for the process");
  return NULL;
}

int main (){

  pthread_create (&thread, NULL, thread2, NULL);
  pthread_create (&thread, NULL, thread3, NULL);

  //Thread 1
  int count1 = 0;

  while(count1 < 10){
        printf("Thread 1: %d\n", count1++);
  }

  pthread_join(thread,NULL);
  return 0;
}