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  1. #include <assert.h>
  2. #include <pthread.h>
  3. #include <stdio.h>
  4. #include <stdlib.h>
  5.  
  6. void *test(void *p)
  7. {
  8.     assert(pthread_detach(pthread_self())==0);
  9.     free(p);			// 再thread裡面free會漸漸使記憶體用量變大
  10.     pthread_exit(NULL);
  11. }
  12.  
  13. int main(int argc, char *argv[])
  14. {
  15.     pthread_t tid;
  16.     void *p;
  17.  
  18.     for(int i=0;i<50;i++)
  19.     {
  20.         p = malloc(8*1024*1024);
  21.         assert(p!=NULL);
  22.         printf("Pointer p = %p\n", p);	// print出來的記憶體位置有重複，應該是free成功
  23.         assert(pthread_create(&tid, NULL, test, p)==0);
  24.         // assert(pthread_join(tid, NULL)==0);	// 等thread結束後再free就不會吃記憶體
  25.         // me_free(p);
  26.         sleep(0);
  27.     }
  28.  
  29.     printf("Finish.\n");
  30.     return 0;
  31. }
  32.  
Success #stdin #stdout 0s 4176KB
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stdin
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Standard input is empty
stdout
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Pointer p = 0x2b825d0b2010
Pointer p = 0x55e267a7c140
Pointer p = 0x55e267a7c140
Pointer p = 0x55e267a7c140
Pointer p = 0x55e267a7c140
Pointer p = 0x55e267a7c140
Pointer p = 0x55e267a7c140
Pointer p = 0x55e267a7c140
Pointer p = 0x55e267a7c140
Pointer p = 0x55e267a7c140
Pointer p = 0x55e267a7c140
Pointer p = 0x55e267a7c140
Pointer p = 0x55e267a7c140
Pointer p = 0x55e267a7c140
Pointer p = 0x55e267a7c140
Pointer p = 0x55e267a7c140
Pointer p = 0x55e267a7c140
Pointer p = 0x55e267a7c140
Pointer p = 0x55e267a7c140
Pointer p = 0x55e267a7c140
Pointer p = 0x55e267a7c140
Pointer p = 0x55e267a7c140
Pointer p = 0x55e267a7c140
Pointer p = 0x55e267a7c140
Pointer p = 0x55e267a7c140
Pointer p = 0x55e267a7c140
Pointer p = 0x55e267a7c140
Pointer p = 0x55e267a7c140
Pointer p = 0x55e267a7c140
Pointer p = 0x55e267a7c140
Pointer p = 0x55e267a7c140
Pointer p = 0x55e267a7c140
Pointer p = 0x55e267a7c140
Pointer p = 0x55e267a7c140
Pointer p = 0x55e267a7c140
Pointer p = 0x55e267a7c140
Pointer p = 0x55e267a7c140
Pointer p = 0x55e267a7c140
Pointer p = 0x55e267a7c140
Pointer p = 0x55e267a7c140
Pointer p = 0x55e267a7c140
Pointer p = 0x55e267a7c140
Pointer p = 0x55e267a7c140
Pointer p = 0x55e267a7c140
Pointer p = 0x55e267a7c140
Pointer p = 0x55e267a7c140
Pointer p = 0x55e267a7c140
Pointer p = 0x55e267a7c140
Pointer p = 0x55e267a7c140
Pointer p = 0x55e267a7c140
Finish.
https://ideone.com/SKWT5Q
language:
C (gcc 8.3)
created:
8 years ago
visibility:
public

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