当你遇到 ValueError: mmap length is greater than file size 这个错误时,这通常是在尝试使用 Python 中的 mmap 模块对文件进行内存映射时发生的。这个错误表明你试图映射的文件区域大小超过了文件的实际大小。以下是一些可能导致此错误的原因以及如何解决它们: 原因 文件大小小于请求的大小:当你使用 mmap 的mmap.mma...
python的mmap库提供了共享内存的实践方案可以完成信息在内存间交互。 简介 共享内存 内存共享是两个...
Maybe relevant, there are cases today where Mmap can accept a zero length and successfully deref to an empty slice. It can happen if you have an offset that isn't a multiple of the page size, so that the real mapping under the covers isn't empty. So in that particular case, the cal...
我正在尝试创建这样一个内存映射文件self.file = open("/tmp/installer.ipk", "r+b")ValueError: mmap length is greater than file size 在运行此文件之前,文件/ 浏览5提问于2014-01-15得票数 2 回答已采纳 1回答 正则表达式解析(流)二进制文件? 、、、 for m in strings(f):除去实际匹配的情况*大于...
the length of the mapping (which must be greater than 0). 看文字mmap的功能就是为当前进程的虚拟内存分配一个新的映射,映射的起始地址是addr长度length。还可以传入一个fd,说明可以将这个虚拟地址绑定到一个文件上。 我的理解 通过看这段文字,我大概脑子里已经有一个大概的思路了。因为我花了很长的时间已经...
Map_length parameter:When __MAP_MEGA is specified, mapping operations are performed over whole segments (megabyte chunks). If the length is not a multiple of the segment size, the entire trailing portion of the last segment will also be mapped into the user storage. ...
Map_length parameter:When __MAP_MEGA is specified, mapping operations are performed over whole segments (megabyte chunks). If the length is not a multiple of the segment size, the entire trailing portion of the last segment will also be mapped into the user storage. ...
The following is a list of address types used in Linux. Figure 13-1 shows how these address types relate to physical memory. User virtual addresses These are the regular addresses seen by user-space programs. User addresses are either 32 or 64 bits in length, depending on the underlying ...
(PyExc_ValueError, "mmap length is greater than file size"); return NULL; } } m_obj = (mmap_object *)type->tp_alloc(type, 0); if (m_obj == NULL) {return NULL;} m_obj->data = NULL; m_obj->size = map_size; m_obj->pos = 0; m_obj->weakreflist = NULL; m_obj->...
#include<sys/mman.h>void*mmap(void*addr,size_t length,intprot,intflags,intfd,off_t offset);intmunmap(void*addr,size_t length); mmap()creates a new mapping in the virtual address space of the calling process. The starting address for the new mapping is ...