Valgrind сообщает о переполнении стека для одной функции - бесконечная рекурсия? - PullRequest
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Valgrind сообщает о переполнении стека для одной функции - бесконечная рекурсия?

0 голосов
/ 03 августа 2020

Я получаю следующий отчет об ошибке от Valgrind при запуске моей программы, особенно в этой функции: 

==1011== Stack overflow in thread #1: can't grow stack to 0x1ffe801000
==1011==
==1011== Process terminating with default action of signal 11 (SIGSEGV)
==1011==  Access not within mapped region at address 0x1FFE801FF8
==1011== Stack overflow in thread #1: can't grow stack to 0x1ffe801000
==1011==    at 0x400D6F: searchGNode (genomefunc.c:42)
==1011==  If you believe this happened as a result of a stack
==1011==  overflow in your program's main thread (unlikely but
==1011==  possible), you can try to increase the size of the
==1011==  main thread stack using the --main-stacksize= flag.
==1011==  The main thread stack size used in this run was 8388608.
==1011== Stack overflow in thread #1: can't grow stack to 0x1ffe801000
==1011==
==1011== Process terminating with default action of signal 11 (SIGSEGV)
==1011==  Access not within mapped region at address 0x1FFE801FC8
==1011== Stack overflow in thread #1: can't grow stack to 0x1ffe801000
==1011==    at 0x4A24710: _vgnU_freeres (vg_preloaded.c:59)
==1011==  If you believe this happened as a result of a stack
==1011==  overflow in your program's main thread (unlikely but
==1011==  possible), you can try to increase the size of the
==1011==  main thread stack using the --main-stacksize= flag.
==1011==  The main thread stack size used in this run was 8388608.

Это рассматриваемая функция: 

 41 GNode * searchGNode ( GNode * root, GNode * newnode, int * flag,int k,GNode * last)
 42 {
 43   GNode * found = NULL;
 44   if (root == NULL)
 45   {
 46     return found;
 47   }
 48   if ( strcmp(root->key,newnode->key) == 0)
 49   {
 50     return root; // this is the match , we have found that this node exists in the graph
 51   }
 52   found = searchGNode(root->one,newnode,flag,k,last); // search first pointer
 53   if (found != NULL)
 54   {
 55     //printf("found duplicate: %s,last: %s \n",newnode->key,last->key);
 56     *flag = 1;
 57     insertGNode(last,found); // insert if we find
 58     return found;
 59   }
 60   found = searchGNode(root->two,newnode,flag,k,last);
 61   if (found != NULL)
 62   {
 63     *flag = 1;
 64     insertGNode(last,found);
 65     return found;
 66   }
 67   found = searchGNode(root->three,newnode,flag,k,last);
 68   if (found != NULL)
 69   {
 70     *flag = 1;
 71     insertGNode(last,found);
 72     return found;
 73   }
 74   found = searchGNode(root->four,newnode,flag,k,last);
 75   if (found != NULL)
 76   {
 77     *flag = 1;
 78     insertGNode(last,found);
 79     return found;
 80   }
 81   return NULL;
 82 }

И это Gnode's struct: 

typedef struct GNode{
  char key [MAX_KMER_LEN]; // MAX_KMER_LEN is defined as 16
  struct GNode* one;
  struct GNode* two;
  struct GNode* three;
  struct GNode* four;
  int in;
  int out;
}GNode;

Есть ли где-нибудь место, где можно увидеть бесконечную рекурсию или переполнение стека? Поскольку моя функция кажется мне прекрасной, я не могу понять, что происходит. Спасибо

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