我现在正在调试我的程序，并且在从地图中删除元素时出现分段错误。 我在我的程序中添加了malloc hook，如下所示:(更新）
#pragma once
#include <stdio.h>
#include <malloc.h>
#include <map>
static void *(*old_memalign_hook)(size_t, size_t, const void *);
static void *(*old_realloc_hook)(void *, size_t, const void *);
static void *(*old_malloc_hook)(size_t, const void *);
static void (*old_free_hook)(void *, const void *);
static void *new_memalign_hook(size_t alignment, size_t size, const void *caller);
static void *new_realloc_hook(void *ptr, size_t size, const void *caller);
static void *new_malloc_hook(size_t size, const void *caller);
static void new_free_hook(void *ptr, const void *caller);
static std::map<void*, const void*> mallocMap;
static void *new_memalign_hook(size_t alignment, size_t size, const void *caller)
{
void *mem;
__memalign_hook = old_memalign_hook;
__realloc_hook = old_realloc_hook;
__malloc_hook = old_malloc_hook;
__free_hook = old_free_hook;
mem = memalign(alignment, size);
// fprintf(stderr, "%p: memalign(%zu, %zu) = %p\n", caller, alignment, size, mem);
mallocMap[mem] = caller;
// fprintf(stderr, "mallocSet size: %zu\n", mallocMap.size());
__memalign_hook = new_memalign_hook;
__realloc_hook = new_realloc_hook;
__malloc_hook = new_malloc_hook;
__free_hook = new_free_hook;
return mem;
}
static void *new_realloc_hook(void *ptr, size_t size, const void *caller)
{
void *mem;
__memalign_hook = old_memalign_hook;
__realloc_hook = old_realloc_hook;
__malloc_hook = old_malloc_hook;
__free_hook = old_free_hook;
mem = realloc(ptr, size);
// fprintf(stderr, "%p: realloc(%p, %zu) = %p\n", caller, ptr, size, mem);
__memalign_hook = new_memalign_hook;
__realloc_hook = new_realloc_hook;
__malloc_hook = new_malloc_hook;
__free_hook = new_free_hook;
return mem;
}
static void *new_malloc_hook(size_t size, const void *caller)
{
void *mem;
__memalign_hook = old_memalign_hook;
__realloc_hook = old_realloc_hook;
__malloc_hook = old_malloc_hook;
__free_hook = old_free_hook;
mem = malloc(size);
// fprintf(stderr, "%p: malloc(%zu) = %p\n", caller, size, mem);
mallocMap[mem] = caller;
// fprintf(stderr, "mallocSet size: %zu\n", mallocMap.size());
__memalign_hook = new_memalign_hook;
__realloc_hook = new_realloc_hook;
__malloc_hook = new_malloc_hook;
__free_hook = new_free_hook;
return mem;
}
static void new_free_hook(void *ptr, const void *caller)
{
__memalign_hook = old_memalign_hook;
__realloc_hook = old_realloc_hook;
__malloc_hook = old_malloc_hook;
__free_hook = old_free_hook;
free(ptr);
if (ptr != 0)
{
// fprintf(stderr, "%p: free(%p)\n", caller, ptr);
std::map<void*, const void*>::iterator it;
if((it = mallocMap.find(ptr)) != mallocMap.end())
{
mallocMap.erase(it);
}
// fprintf(stderr, "mallocSet size: %zu\n", mallocMap.size());
if(mallocMap.size() == 89)
{
for(auto it2 = mallocMap.begin(); it2 != mallocMap.end(); it2++)
{
// fprintf(stderr, "mallocSet: %p %p\n", (*it2).first, (*it2).second);
}
}
}
__memalign_hook = new_memalign_hook;
__realloc_hook = new_realloc_hook;
__malloc_hook = new_malloc_hook;
__free_hook = new_free_hook;
}
static void init_my_hooks(void)
{
mallocMap = std::map<void*, const void*>();
old_memalign_hook = __memalign_hook;
old_realloc_hook = __realloc_hook;
old_malloc_hook = __malloc_hook;
old_free_hook = __free_hook;
__memalign_hook = new_memalign_hook;
__realloc_hook = new_realloc_hook;
__malloc_hook = new_malloc_hook;
__free_hook = new_free_hook;
// fprintf(stderr, "mallocSet size: %zu\n", mallocMap.size());
}
它在new_free_hook()。
在gdb中我有以下打印，似乎没问题（或者是吗？）：
(gdb) p mallocMap[ptr]
$2 = (std::map<void*, void const*, std::less<void*>, std::allocator<std::pair<void* const, void const*> > >::mapped_type &) @0x2e3c6a8: 0x0
(gdb) p it
$1 = {first = , second = <operator new(unsigned long)+29>}
(gdb) p mallocMap
$3 = std::map with 101 elements = {[0x2e39970] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e39a00] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e39ad0] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e39b50] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e39c10] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e39c90] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e39d20] = 0x7ffff35392fd <operator new(unsigned long)+29>, [0x2e39d80] = 0x37f1035fe4 <__new_exitfn+276>,
[0x2e3a1e0] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3a2b0] = 0x7ffff35392fd <operator new(unsigned long)+29>, [0x2e3a640] = 0x37f1035fe4 <__new_exitfn+276>,
[0x2e3ab50] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3abd0] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3aca0] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3ad20] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3adf0] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3ae50] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3aee0] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3af40] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3af70] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3b000] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3b050] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3b0e0] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3b160] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3b270] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3b300] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3b3a0] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3b430] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3b490] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3b4c0] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3b500] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3b590] = 0x7ffff35392fd <operator new(unsigned long)+29>, [0x2e3b5f0] = 0x37f1035fe4 <__new_exitfn+276>,
[0x2e3ba50] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3bab0] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3bc40] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3bc60] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3bc80] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3bca0] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3bd00] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3bd20] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3bd90] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3bdb0] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3be10] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3be70] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3bed0] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3bf50] = 0x7ffff35392fd <operator new(unsigned long)+29>, [0x2e3bfc0] = 0x0,
[0x2e3c120] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3c180] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3c1e0] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3c240] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3c6c0] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3c780] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3c7e0] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3c840] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3c960] = 0x7ffff35392fd <operator new(unsigned long)+29>,
---Type <return> to continue, or q <return> to quit---
[0x2e3c9f0] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3ca10] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3ca70] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3cb90] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3cc00] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3cc20] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3cc40] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3cc60] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3ccc0] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3cd50] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3cd70] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3cdd0] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3ce30] = 0x7ffff35392fd <operator new(unsigned long)+29>, [0x2e3d140] = 0x37f1035fe4 <__new_exitfn+276>,
[0x2e3d5a0] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3d610] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3d6e0] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3d7a0] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3d820] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3d8f0] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3da70] = 0x7ffff35392fd <operator new(unsigned long)+29>,
[0x2e3db00] = 0x7ffff35392fd <operator new(unsigned long)+29>, [0x2e3db60] = 0x37f1035fe4 <__new_exitfn+276>,
[0x2fc5a60] = 0x37f1035fe4 <__new_exitfn+276>, [0x300abc0] = 0x37f1035fe4 <__new_exitfn+276>,
[0x3014290] = 0x37f1035fe4 <__new_exitfn+276>, [0x3014750] = 0x37f1035fe4 <__new_exitfn+276>,
[0x3014bb0] = 0x37f1081182 <strdup+34>, [0x3014c10] = 0x37f102a409 <_nl_load_locale_from_archive+601>,
[0x3014cd0] = 0x37f1029e27 <_nl_intern_locale_data+119>, [0x3015020] = 0x37f1029e27 <_nl_intern_locale_data+119>,
[0x30150e0] = 0x37f1029e27 <_nl_intern_locale_data+119>, [0x30154e0] = 0x37f1029e27 <_nl_intern_locale_data+119>,
[0x3015600] = 0x37f1029e27 <_nl_intern_locale_data+119>, [0x3015800] = 0x37f1029e27 <_nl_intern_locale_data+119>,
[0x30158b0] = 0x37f1029e27 <_nl_intern_locale_data+119>, [0x3015950] = 0x37f1029e27 <_nl_intern_locale_data+119>,
[0x3015a10] = 0x37f1029e27 <_nl_intern_locale_data+119>, [0x3015b00] = 0x37f1029e27 <_nl_intern_locale_data+119>,
[0x3015bb0] = 0x37f1029e27 <_nl_intern_locale_data+119>, [0x3015c50] = 0x37f1029e27 <_nl_intern_locale_data+119>,
[0x3015d60] = 0x37f1081182 <strdup+34>, [0x3015dc0] = 0x37f1028dcd <new_composite_name+493>...}
分段错误的BackTrace：
#0 std::_Rb_tree_rebalance_for_erase (__z=0x2fc5ff0, __header=...)
at ../../../../../libstdc++-v3/src/c++98/tree.cc:370
#1 0x00007fffef1f65d4 in std::_Rb_tree<void*, std::pair<void* const, void const*>, std::_Select1st<std::pair<void* const, void const*> >, std::less<void*>, std::allocator<std::pair<void* const, void const*> > >::_M_erase_aux (
this=0x7ffff34d9800 <mallocMap>, __position=...)
at /usr/local/prerequisites/package-install/gcc-4.8.2/include/c++/4.8.2/bits/stl_tree.h:1745
#2 0x00007fffef1f5a1d in std::_Rb_tree<void*, std::pair<void* const, void const*>, std::_Select1st<std::pair<void* const, void const*> >, std::less<void*>, std::allocator<std::pair<void* const, void const*> > >::erase[abi:cxx11](std::_Rb_tree_iterator<std::pair<void* const, void const*> >) (this=0x7ffff34d9800 <mallocMap>, __position=...)
at /usr/local/prerequisites/package-install/gcc-4.8.2/include/c++/4.8.2/bits/stl_tree.h:820
#3 0x00007fffef1f53ac in std::map<void*, void const*, std::less<void*>, std::allocator<std::pair<void* const, void const*> > >::erase[abi:cxx11](std::_Rb_tree_iterator<std::pair<void* const, void const*> >) (
this=0x7ffff34d9800 <mallocMap>, __position=...)
at /usr/local/prerequisites/package-install/gcc-4.8.2/include/c++/4.8.2/bits/stl_map.h:697
#4 0x00007fffef1f4d52 in new_free_hook (ptr=0x3031900, caller=0x7ffff7dc39ff) at utils/malloc_hook.h:89
#5 0x00007ffff7dc39ff in ?? () from /usr/local/prerequisites/versions/2.0/lib64/libcudart.so.5.5
#6 0x00007ffff7dc3bb7 in ?? () from /usr/local/prerequisites/versions/2.0/lib64/libcudart.so.5.5
#7 0x00007fffe8fb04d1 in __cudaUnregisterBinaryUtil ()
at /usr/local/prerequisites/versions/2.0/include/crt/host_runtime.h:220
#8 0x00000037f10361bd in __cxa_finalize () from /lib64/libc.so.6
#9 0x00007fffe8ebdf46 in __do_global_dtors_aux () from /home/vlad/build/libbasic_lib.so
#10 0x00000000000000a2 in ?? ()
#11 0x0000000000000000 in ?? ()
有谁知道可能是什么问题？