ldd

ldd outputs statically linked on a shared library

╄→尐↘猪︶ㄣ 提交于 2021-01-27 17:04:10
问题 I am trying to create a shared library libddv3djava.so I compile sources for libddv3djava.so like so: ~/Programming/intellijprojects/ddv3dbindingstest/src $ g++ -c -Wall -Werror -I. -I /usr/lib/jvm/java-8-oracle/include/ -I /usr/lib/jvm/java-8-oracle/include/linux/ -fpic com_ddv3d_Ddv3dBinding.cpp Creating libddv3djava.so: ~/Programming/intellijprojects/ddv3dbindingstest/src $ g++ -shared -o libddv3djava.so com_ddv3d_Ddv3dBinding.o When I do ldd on libddv3djava.so: ~/Programming

Is there a way to determine thread local storage model used by a library on Linux

筅森魡賤 提交于 2020-12-02 07:22:52
问题 Is there a way to query the TLS model of a shared library on Linux? (eg using ldd or some other tool). I am having a trouble with loading too many libraries with the "initial-exec" model and would like to determine for sure which of the third party libs use this model (so I can free up some slots eg by linking statically). This results in an error: dlopen: cannot load any more object with static TLS see this question. 回答1: I ran into this error myself, and while investigating it, I came on a

Is there a way to determine thread local storage model used by a library on Linux

こ雲淡風輕ζ 提交于 2020-12-02 07:22:29
问题 Is there a way to query the TLS model of a shared library on Linux? (eg using ldd or some other tool). I am having a trouble with loading too many libraries with the "initial-exec" model and would like to determine for sure which of the third party libs use this model (so I can free up some slots eg by linking statically). This results in an error: dlopen: cannot load any more object with static TLS see this question. 回答1: I ran into this error myself, and while investigating it, I came on a

libm.so.6: cannot open shared object file: No such file or directory

社会主义新天地 提交于 2020-06-12 11:43:18
问题 I've install a program in Centos 6.8, While running the program, I receive error "error while loading shared libraries: libm.so.6: cannot open shared object file: No such file or directory" when I checked the linked library to the program using ldd command, I can see libm.so.6 with correct 64bit "libm.so.6 => /lib64/libm.so.6 (0x0000003a19000000)" That means, library is installed and already added in environment variable, LD_LIBRARY_PATH Another program, which uses libm.so.6, works fine. Can

libm.so.6: cannot open shared object file: No such file or directory

别来无恙 提交于 2020-06-12 11:40:09
问题 I've install a program in Centos 6.8, While running the program, I receive error "error while loading shared libraries: libm.so.6: cannot open shared object file: No such file or directory" when I checked the linked library to the program using ldd command, I can see libm.so.6 with correct 64bit "libm.so.6 => /lib64/libm.so.6 (0x0000003a19000000)" That means, library is installed and already added in environment variable, LD_LIBRARY_PATH Another program, which uses libm.so.6, works fine. Can

snprintf和sprintf区别分析

﹥>﹥吖頭↗ 提交于 2020-04-15 16:44:14
【推荐阅读】微服务还能火多久?>>> 今天在项目中使用snprintf时遇到一个比较迷惑的问题,追根溯源了一下,在此对sprintf和snprintf进行一下对比分析。 因为sprintf可能导致缓冲区溢出问题而不被推荐使用,所以在项目中我一直优先选择使用snprintf函数,虽然会稍微麻烦那么一点点。这里就是sprintf和snprintf最主要的区别:snprintf通过提供缓冲区的可用大小传入参数来保证缓冲区的不溢出,如果超出缓冲区大小则进行截断。但是对于snprintf函数,还有一些细微的差别需要注意。 snprintf函数的返回值 sprintf函数返回的是 实际输出 到字符串缓冲中的字符个数,包括null结束符。而snprintf函数返回的是 应该输出 到字符串缓冲的字符个数,所以snprintf的返回值可能大于给定的可用缓冲大小以及最终得到的字符串长度。看代码最清楚不过了: char tlist_3[10] = {0}; int len_3 = 0; len_3 = snprintf(tlist_3,10,"this is a overflow test!\n"); printf("len_3 = %d,tlist_3 = %s\n",len_3,tlist_3); 上述代码段的输出结果如下: len_3 = 25,tlist_3 = this is a

查看Linux上程序或进程用到的库

佐手、 提交于 2020-03-18 13:29:45
某厂面试归来,发现自己落伍了!>>> ldd /path/to/program 要找出某个特定可执行依赖的库,可以使用ldd命令。这个命令调用动态链接器去找到程序的库文件依赖关系。 objdump -p /path/to/program | grep NEEDED 注意!并不推荐为任何不可信的第三方可执行程序运行ldd,因为某些版本的ldd可能会直接调用可执行程序来明确其库文件依赖关系,这样可能不安全。取而代之的是用一个更安全的方式来显示一个未知应用程序二进制文件的库文件依赖。 pldd 1100 如果你想要找出被一个运行中的进程载入的共享库,你可以使用pldd命令,它会显示出在运行时被载入一个进程里的所有共享对象。 注意你需要root权限去执行pldd命令。 pmap 1100 或者,也可以选择一个叫做pmap的命令行工具。它报告一个进程的内存映射,也能显示出运行进程的库文件依赖。 来源: oschina 链接: https://my.oschina.net/u/139930/blog/306177

C++: linked library disappears and gives segfault during execution

丶灬走出姿态 提交于 2020-01-03 03:25:52
问题 I'm having a problem building a library. In the Makefile I tell g++ that I need tclstub8.6 by putting -ltclstub8.6 , and g++ takes it into account (sorry for these messages in French): make: AVERTISSEMENT : le fichier « ../Linux-PORT/i586-GCC4/Makefile » a une date de modification 609 s dans le futur *** Compile c [gcc] libtestGuiMnt_info.Linux-PORT.i586-GCC4.c *** Compile C++ [g++] mntdisplay.cc *** Compile C++ [g++] mntogl.cc mntogl.cc: In member function 'virtual int MNTOgl::Display()