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ls 不显示，rm 删不掉，怎么办？

, 3, 0) = 0x46f000 old_mmap(0x474000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE..., 3, 0) = 0x5d4000 old_mmap(0x5d7000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE..., 3, 0) = 0x111000 old_mmap(0x244000, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE..., 3, 0) = 0xfd5000 old_mmap(0xfd7000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE..., 3, 0) = 0x46f000 old_mmap(0x474000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE

1.2K4 0

futex验证_fulvic

]) = 0 brk(0) = 0x237e000 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE...O_CLOEXEC) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=72041, …}) = 0 mmap(NULL, 72041, PROT_READ, MAP_PRIVATE...fstat(3, {st_mode=S_IFREG|0755, st_size=141616, …}) = 0 mmap(NULL, 2208864, PROT_READ|PROT_EXEC, MAP_PRIVATE...mprotect(0x7fac07bd9000, 2097152, PROT_NONE) = 0 mmap(0x7fac07dd9000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE...|MAP_ANONYMOUS, -1, 0) = 0x7fac07feb000 mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS

3732 0

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使用strace分析exp的奇怪问题(r3笔记第41天)

8428 0

使用golang的net包进行域名解析过程分析

*/]) = 0 brk(0) = 0x5ab000 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE...|MAP_ANONYMOUS, -1, 0) = 0x7f5c6da38000 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS..., -1, 0) = 0x7f5c6da37000 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =...|MAP_ANONYMOUS, -1, 0) = 0x7f5c6d9f6000 mmap(0xc420000000, 1048576, PROT_READ|PROT_WRITE, MAP_PRIVATE..., -1, 0) = 0xc41fff8000 mmap(0xc000000000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,

14K6 0

十个例子让你了解 strace 的使用技巧

mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fe8f406b000 mprotect(...0x7fe8f422b000, 2097152, PROT_NONE) = 0 mmap(0x7fe8f442b000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE...|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fe8f4431000 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|...MAP_ANONYMOUS, -1, 0) = 0x7fe8f4632000 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS..., -1, 0) = 0x7fe8f4631000 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =

5.1K1 0

无法获取指向控制台的文件描述符 (couldnt get a file descriptor referring to the console)

) = 3 fstat64(3, {st_mode=S_IFREG|0644, st_size=42, ...}) = 0 mmap2(NULL, 42, PROT_READ|PROT_WRITE, MAP_PRIVATE...|MAP_ANONYMOUS, -1, 0) = 0x76f90000 mmap2(NULL, 1312152, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE...|MAP_FIXED|MAP_DENYWRITE, 3, 0x12b000) = 0x76f36000 mmap2(0x76f39000, 9624, PROT_READ|PROT_WRITE, MAP_PRIVATE...|MAP_ANONYMOUS, -1, 0) = 0x76f94000 mmap2(NULL, 1312152, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE...|MAP_ANONYMOUS, -1, 0) = 0x76efc000 mmap2(NULL, 1312152, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE

3.8K2 0

Swoole 4.4：支持 CURL 协程化

epoll_create(512) = 3 mmap(NULL, 258048, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS..., -1, 0) = 0x7fc038a50000 mmap(NULL, 2101248, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0)...0x7fc0289009d0, tls=0x7fc028900700, child_tidptr=0x7fc0289009d0) = 55 mmap(NULL, 8392704, PROT_NONE, MAP_PRIVATE...0x7fc023ff09d0, tls=0x7fc023ff0700, child_tidptr=0x7fc023ff09d0) = 56 mmap(NULL, 8392704, PROT_NONE, MAP_PRIVATE...0x7fc0237e09d0, tls=0x7fc0237e0700, child_tidptr=0x7fc0237e09d0) = 57 mmap(NULL, 8392704, PROT_NONE, MAP_PRIVATE

6613 0

strace(1) command

*/]) = 0 brk(0) = 0x1e79000 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE...fstat(3, {st_mode=S_IFREG|0755, st_size=2122016, ...}) = 0 mmap(NULL, 3944896, PROT_READ|PROT_EXEC, MAP_PRIVATE...mprotect(0x7ff4e9bc1000, 2093056, PROT_NONE) = 0 mmap(0x7ff4e9dc0000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE...= 0x7ff4e9dc6000 close(3) = 0 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE...= 0x7ff4e9a05000 close(3) = 0 mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE

3462 0

Linux 命令（137）—— strace 命令

10.1K3 1

这条命令有可能断送DBA职业生涯，我今天真的执行了

*/, 0x7fffbdbb9df0) = -1 EINVAL (Invalid argument) mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE...O_CLOEXEC) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=18383, ...}) = 0 mmap(NULL, 18383, PROT_READ, MAP_PRIVATE...\5\0\0\0GNU\0\2\0\0\300\4\0\0\0\3\0\0\0\0\0\0\0", 32) = 32 mmap(NULL, 3950816, PROT_READ|PROT_EXEC, MAP_PRIVATE...mprotect(0x7fdf0e14e000, 2093056, PROT_NONE) = 0 mmap(0x7fdf0e34d000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE...= 0x7fdf0e353000 close(3) = 0 mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE

2281 0

df 和 ls 命令执行夯主

/hello "], [/* 7 vars */])= 0 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS,-1, 0)...|MAP_ANONYMOUS, -1, 0) =0x2aabe000 mmap(0x2aabe000, 169308, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED...,3, 0) = 0x2aabe000 mmap(0x2aaf8000, 2400, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED,3, 0x2a000) =...,3, 0) = 0x2aaf9000 mmap(0x2ab65000, 8088, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED,3, 0x5c000) =...0x2ab65000 mmap(0x2ab67000, 19376, PROT_READ|PROT_WRITE,MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) =

2.2K1 0

CVE-2021-44731 linux snap 本地提权漏洞分析

|MAP_ANONYMOUS, -1, 0) = 0x7fda927f7000 mmap(NULL, 182536, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0...) = 0x7fda927ca000 mmap(0x7fda927cf000, 114688, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE..., 3, 0x5000) = 0x7fda927cf000 mmap(0x7fda927eb000, 40960, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE..., 3, 0x21000) = 0x7fda927eb000 mmap(0x7fda927f5000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED...|MAP_DENYWRITE, 3, 0x1000) = 0x7fda927c5000 mmap(0x7fda927c7000, 4096, PROT_READ, MAP_PRIVATE|MAP_FIXED

3.7K10 0

线程的创建以及线程的本质

832 fstat(3, {st_mode=S_IFREG|0755, st_size=144976, ...}) = 0 mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE...|MAP_ANONYMOUS, -1, 0) = 0x7f31ab97d000 mmap(NULL, 2221184, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE...fstat(3, {st_mode=S_IFREG|0755, st_size=2030544, ...}) = 0 mmap(NULL, 4131552, PROT_READ|PROT_EXEC, MAP_PRIVATE...mprotect(0x7f31ab348000, 2097152, PROT_NONE) = 0 mmap(0x7f31ab548000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE...0x7f31ab54e000 close(3) = 0 mmap(NULL, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE

1.8K2 0

Swoole v4.7 版本预览之支持 c-ares

CLOCK_MONOTONIC, {tv_sec=2244208, tv_nsec=658303392}) = 0 mmap(NULL, 2101248, PROT_READ|PROT_WRITE, MAP_PRIVATE...= 4 fstat(4, {st_mode=S_IFREG|0644, st_size=89, ...}) = 0 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE...= 0 munmap(0x7f41832b9000, 4096) = 0 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE...= 4 fstat(4, {st_mode=S_IFREG|0644, st_size=242, ...}) = 0 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE

8794 0

【Linux 内核内存管理】内存映射相关数据结构 ③ ( vm_area_struct 结构体成员分析 | shared 成员 | anon_vma_chain 成员 | anon_vma 成员 )

anon_vma 实例串联起来 , 组成一个链表 ; struct list_head anon_vma_chain 成员就是该 anon_vma 实例组成的链表 ; /* * A file's MAP_PRIVATE...An anonymous MAP_PRIVATE, stack * or brk vma (with NULL file) can only be in an anon_vma list. */.... */ struct { struct rb_node rb; unsigned long rb_subtree_last; } shared; /* * A file's MAP_PRIVATE...An anonymous MAP_PRIVATE, stack * or brk vma (with NULL file) can only be in an anon_vma list. */

2.6K3 0

Linux系统下刨析hello world背后的秘密

832 fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE...|MAP_ANONYMOUS, -1, 0) = 0x7fbb541f7000 mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE...mprotect(0x7fbb53de6000, 2097152, PROT_NONE) = 0 mmap(0x7fbb53fe6000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE...= 0x7fbb53fec000 close(3) = 0 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE...|MAP_ANONYMOUS, -1, 0) = 0x7fbb541f6000 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS

7192 0

sqlplus执行错误的问题探究

sqlplus", ["sqlplus"], [/* 29 vars */]) = 0 brk(NULL) = 0x1b20000 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE...sqlplus", ["sqlplus"], [/* 28 vars */]) = 0 brk(NULL) = 0x16ec000 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE...fstat(3, {st_mode=S_IFREG|0555, st_size=1469542, ...}) = 0 mmap(NULL, 1985056, PROT_READ|PROT_EXEC, MAP_PRIVATE...mprotect(0x7fcd72a17000, 1048576, PROT_NONE) = 0 mmap(0x7fcd72b17000, 57344, PROT_READ|PROT_WRITE, MAP_PRIVATE...sqlplus", ["sqlplus"], [/* 28 vars */]) = 0 brk(0) = 0x22c0000 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE

1.1K1 0

JVM源码分析之perfData文件的创建

默认这个参数是关闭的，也就是默认支持共享的方式由于perfdata文件时通过mmap共享的，因此考虑看下perfdata文件的创建过程，看看跟mmap的MAP_SHARED和MAP_PRIVATE两个标志位是如何联系在一起的...perfdata文件底层是使用mmap接口实现的，而mmap接口的参数中有关于内存可见性的两个参数：MAP_SHARED和MAP_PRIVATE，如果JVM参数设置允许perfdata文件共享，则使用MAP_SHARED...然后看create_standard_memory(size)的实现，这里并没有跟之前猜想的一样（用mmap方法建映射，传入MAP_PRIVATE标记），而是使用了os::reserve_memory(

1.3K1 0

学习mmap

通常我们都说是通过调用 malloc来申请堆上内存，但实际上其内部实现使用了 brk和 mmap两种系统调用，当申请的内存大于128K时，使用 mmap 典型用法是无需提供打开的文件句柄, 使用 MAP_PRIVATE...| MAP_ANONYMOUS flag void *addr = mmap (NULL, buffer_size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS..., -1, 0); mmap的写时拷贝如果我们在调用mmap时提供一个打开的文件句两，但使用 MAP_PRIVATE的flags, 那这时对其的写操作并不能真正修改对应的磁盘文件，它会作写时拷贝...mmap映射的是磁盘文件，其存在物理页的内容会被清空，pte将记录这种情况，再次需要访问时，会重新读取磁盘文件，缓存在page cache中; 如果使用mmap作匿名映射，没有相关联的磁盘文件（或者使用MAP_PRIVATE

9574 0

mmap概述

MAP_PRIVATE：创建一个私有的写时复制的映射。多个进程可以通过私有映射的方式来映射一个文件，这样其他进程不会看到映射内容的改变，修改后的内容也不会同步到磁盘文件中。...-通常用于进程间共享内存文件映射私有文件映射-通常用于加载动态库共享文件映射-通常用于内存映射IO，进程间通信私有匿名映射当使用参数fd=-1且flags=MAP_ANONYMOUS | MAP_PRIVATE...私有文件映射私有文件映射时flags的标志位被设置为MAP_PRIVATE，那么就会创建私有文件映射。私有文件映射的最常用的场景是加载动态共享库。

1.5K1 0

点击加载更多

ls 不显示，rm 删不掉，怎么办？

futex验证_fulvic

使用strace分析exp的奇怪问题(r3笔记第41天)

使用golang的net包进行域名解析过程分析

十个例子让你了解 strace 的使用技巧

无法获取指向控制台的文件描述符 (couldnt get a file descriptor referring to the console)

Swoole 4.4：支持 CURL 协程化

strace(1) command

Linux 命令（137）—— strace 命令

这条命令有可能断送DBA职业生涯，我今天真的执行了

df 和 ls 命令执行夯主

CVE-2021-44731 linux snap 本地提权漏洞分析

线程的创建以及线程的本质

Swoole v4.7 版本预览之支持 c-ares

【Linux 内核内存管理】内存映射相关数据结构 ③ ( vm_area_struct 结构体成员分析 | shared 成员 | anon_vma_chain 成员 | anon_vma 成员 )

Linux系统下刨析hello world背后的秘密

sqlplus执行错误的问题探究

JVM源码分析之perfData文件的创建

学习mmap

mmap概述

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