C valgrind内存泄漏

Question

嗨，我的 Valgrind 显示内存错误，但我找不到它。

==18608== HEAP SUMMARY:

==18608== in use at exit: 88 bytes in 1 blocks

==18608== total heap usage: 4 allocs, 3 frees, 2,220 bytes allocated

==18608==

==18608== Searching for pointers to 1 not-freed blocks

==18608== Checked 53,708 bytes

==18608==

==18608== 88 bytes in 1 blocks are definitely lost in loss record 1 of 1

==18608== at 0x402D17C: malloc (in /usr/lib/valgrind/vgpreload_memcheck-x86-linux.so)

==18608== by 0x8 0485BF: pmalloc (in auf)

==18608== by 0x8048680: main (in auf)

==18608==

==18608== LEAK SUMMARY:

==18608== definitely lost: 88 bytes in 1 blocks

==18608== indirectly lost: 0 bytes in 0 blocks

==18608== possibly lost: 0 bytes in 0 blocks

==18608== still reachable: 0 bytes in 0 blocks

==18608== suppressed: 0 bytes in 0 blocks

==18608==

==18608== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 0 from 0)

==18608== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 0 from 0)

Answer 1

您分配了两个不同的int *；您不会释放第一个资源，但会释放第二个资源而不对其进行任何操作:

print_prim(pmalloc(n), laenge);
free(pmalloc(laenge));

要正确释放第一个资源，您可以执行以下操作:

int *p = pmalloc(n);
print_prim(p, laenge);
free(p);