Nik*_*s R 9 c linux ubuntu valgrind
我试图找出使用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.
我怎样才能启用它？
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;
}