编辑:为了清楚起见,我将保留问题原样。该 问题似乎是
Kameleon
类使用boost
,从那以后 我自己的代码也使用它可能有冲突的版本和 这就是问题的来源。
原始问题:
很多信息,但我试图把它归结为有趣的部分。我正在编写一个应用程序,它使用类Kameleon
的实例(我自己没有编写)来执行各种任务。当我尝试使用new
关键字来分配实例时,我遇到了麻烦。这是问题的缩小版本:
#include <ccmc/Kameleon.h>
int main() {
ccmc::Kameleon k;
ccmc::Kameleon *k2 = new ccmc::Kameleon(); // <-- crashes with this line
delete k2:
return 0;
}
SIDE注意:注释掉new
的{{1}}分配并且仅运行k2
,我可以使用该变量。但是,当我尝试使用main()时,程序会出现段错误。析构函数什么都不做。
`Kameleon构造函数执行以下操作:
ccmc::Kameleon k
我已经尝试了我的错误消息,gdb和valgrind的问题,但似乎无法找到源。这就是程序运行的原因:
// Kameleon.cpp
/*47*/ Kameleon::Kameleon() : model(NULL), // model is a non-const pointer
/*48*/ modelName("NA"), // modelName is a non-const std::string
/*49*/ missingValue(0.f) // missingValue is a non-const float
/*50*/ {}
gdb告诉我以下内容:
FurnaceApp: malloc.c:2451: sYSMALLOc: Assertion `(old_top == (((mbinptr) (((char *) &((av)->bins[((1) - 1) * 2])) - __builtin_offsetof (struct malloc_chunk, fd)))) && old_size == 0) || ((unsigned long) (old_size) >= (unsigned long)((((__builtin_offsetof (struct malloc_chunk, fd_nextsize))+((2 * (sizeof(size_t))) - 1)) & ~((2 * (sizeof(size_t))) - 1))) && ((old_top)->size & 0x1) && ((unsigned long)old_end & pagemask) == 0)' failed.
Aborted (core dumped)
最后,valgrind给了我很多输出,但这部分看起来与以前的错误最相似:
(gdb) bt
#0 0x00007ffff6b1c425 in __GI_raise (sig=<optimized out>) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
#1 0x00007ffff6b1fb8b in __GI_abort () at abort.c:91
#2 0x00007ffff6b6415d in __malloc_assert (assertion=<optimized out>, file=<optimized out>, line=<optimized out>, function=<optimized out>)
at malloc.c:300
#3 0x00007ffff6b67664 in sYSMALLOc (av=0x7ffff6e9e720, nb=48) at malloc.c:2448
#4 _int_malloc (av=0x7ffff6e9e720, bytes=27) at malloc.c:3892
#5 0x00007ffff6b68fb5 in __GI___libc_malloc (bytes=27) at malloc.c:2924
#6 0x00007ffff746cded in operator new(unsigned long) () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#7 0x00007ffff7455a89 in std::string::_Rep::_S_create(unsigned long, unsigned long, std::allocator<char> const&) ()
from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#8 0x00007ffff7457495 in char* std::string::_S_construct<char const*>(char const*, char const*, std::allocator<char> const&, std::forward_iterator_tag) () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#9 0x00007ffff74575e3 in std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string(char const*, std::allocator<char> const&) () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#10 0x00007ffff7757caf in ccmc::Kameleon::Kameleon (this=0x67d920) at Kameleon.cpp:49
#11 0x0000000000415516 in main ()
在这里和那里四处看看似乎这些错误通常在使用==11789== Invalid write of size 8
==11789== at 0x52ECC8D: ccmc::Kameleon::Kameleon() (buckets.hpp:128)
==11789== by 0x415515: main (in /home/vsand/OpenSpace/Furnace/FurnaceApp)
==11789== Address 0x6683a00 is 0 bytes after a block of size 464 alloc'd
==11789== at 0x4C2B1C7: operator new(unsigned long) (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==11789== by 0x41550A: main (in /home/vsand/OpenSpace/Furnace/FurnaceApp)
==11789==
==11789== Invalid write of size 8
==11789== at 0x52ECC94: ccmc::Kameleon::Kameleon() (table.hpp:226)
==11789== by 0x415515: main (in /home/vsand/OpenSpace/Furnace/FurnaceApp)
==11789== Address 0x6683a28 is not stack'd, malloc'd or (recently) free'd
==11789==
==11789== Invalid write of size 8
==11789== at 0x52ECC9F: ccmc::Kameleon::Kameleon() (Kameleon.cpp:49)
==11789== by 0x415515: main (in /home/vsand/OpenSpace/Furnace/FurnaceApp)
==11789== Address 0x6683a30 is not stack'd, malloc'd or (recently) free'd
==11789==
不正确并且写入超出分配的内存等时出现。malloc
类中有很多代码,但是因为我做了不写自己我试图追踪它有问题。任何错误狩猎技巧将非常感激!
答案 0 :(得分:1)
你可以尝试:
Kameleon::Kameleon(): model(NULL), modelName("N/A") {
// ...
}
modelName
const是否有机会?
您是否还可以删除CDFReader
构造函数中的所有uncesseray代码以隔离错误?甚至更好:
#include "Kameleon.h" // or whatever
int main(){
ccmc::Kameleon k;
ccmc::Kameleon *k2 = new ccmc::Kameleon();
delete k2;
}
Kameleon
是派生类吗?它会使new
运算符超载吗?
答案 1 :(得分:1)
==11789== Invalid write of size 8
==11789== at 0x52ECC8D: ccmc::Kameleon::Kameleon() (buckets.hpp:128)
==11789== by 0x415515: main (in /home/vsand/OpenSpace/Furnace/FurnaceApp)
==11789== Address 0x6683a00 is 0 bytes after a block of size 464 alloc'd
==11789== at 0x4C2B1C7: operator new(unsigned long) (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==11789== by 0x41550A: main (in /home/vsand/OpenSpace/Furnace/FurnaceApp)
这意味着:
ccmc::Kameleon
实例的代码认为sizeof(ccmc::Kameleon)
是464,而ccmc::Kameleon::Kameleon()
的代码写入字节[this+464, this+472)
。最可能的原因:
buckets.hpp
和您必须重建所有使用Kameleon
的代码,一旦您这样做,您的问题就会消失。
buckets.hpp来自boost标题
另一种可能性是您正在链接一个针对不同版本的Boost编译的库。 无法工作, 使用完全相同版本的Boost。
最后一种可能性是使用一组不一致的-DXX
标志编译Boost,导致Kameleon
类的不同定义(并再次违反一个定义规则)。