Question

我正在尝试找出使用Valgrind对一块内存进行无效写入的位置。它告诉我们存在这样一个问题，也就是说什么功能，但不是在哪一行。虽然功能非常小，但我想在Valgrind中显示行号。我在Valgrind的一些输出上看过这个，但目前它们没有显示，我想知道为什么。

输出如下：

niklas@emerald:~/Arbeitsfläche/spyr/bin/Debug$ valgrind --tool=memcheck --leak-check=full --show-reachable=yes ./spyr
[...]
==4404== Invalid write of size 4
==4404==    at 0x8048849: sp_ParticleBuffer_init (in /home/niklas/Arbeitsfläche/spyr/bin/Debug/spyr)
==4404==    by 0x8048BFC: sp_ParticleSystem_createParticle (in /home/niklas/Arbeitsfläche/spyr/bin/Debug/spyr)
==4404==    by 0x8048691: main (in /home/niklas/Arbeitsfläche/spyr/bin/Debug/spyr)
==4404==  Address 0x422a0a0 is 4 bytes after a block of size 4 alloc'd
==4404==    at 0x402BE68: malloc (in /usr/lib/valgrind/vgpreload_memcheck-x86-linux.so)
==4404==    by 0x8048BC1: sp_ParticleSystem_createParticle (in /home/niklas/Arbeitsfläche/spyr/bin/Debug/spyr)
==4404==    by 0x8048691: main (in /home/niklas/Arbeitsfläche/spyr/bin/Debug/spyr)
==4404== 
==4404== Invalid write of size 4
==4404==    at 0x8048865: sp_ParticleBuffer_init (in /home/niklas/Arbeitsfläche/spyr/bin/Debug/spyr)
==4404==    by 0x8048BFC: sp_ParticleSystem_createParticle (in /home/niklas/Arbeitsfläche/spyr/bin/Debug/spyr)
==4404==    by 0x8048691: main (in /home/niklas/Arbeitsfläche/spyr/bin/Debug/spyr)
==4404==  Address 0x422a09c is 0 bytes after a block of size 4 alloc'd
==4404==    at 0x402BE68: malloc (in /usr/lib/valgrind/vgpreload_memcheck-x86-linux.so)
==4404==    by 0x8048BC1: sp_ParticleSystem_createParticle (in /home/niklas/Arbeitsfläche/spyr/bin/Debug/spyr)
==4404==    by 0x8048691: main (in /home/niklas/Arbeitsfläche/spyr/bin/Debug/spyr)
[...]

我看到了输出，其中行号在文件名后面的双冒号后显示。即/home/niklas/Arbeitsfläche/spyr/bin/Debug/spyr:23或类似的。

如何启用此功能？

仅供参考，这是sp_ParticleBuffer_init功能。

int sp_ParticleBuffer_init(sp_ParticleBuffer* buffer, sp_Uint32 buffer_size, int init_zero) {
    size_t size   = sizeof(sp_Particle) * buffer_size;
    buffer->next  = null;
    buffer->array = (sp_Particle*) malloc(size);
    buffer->alive_count = 0;

    if (!buffer->array) return SPYR_ALLOCFAILED;
    if (init_zero) memset((void*) buffer->array, 0, size);
    return SPYR_NOERR;
}

Answer 1

您需要在二进制文件中包含调试信息。如果您使用的是-g，请传递gcc标记。

Valgrind不显示行号

1 个答案: