Pthread mutex assertion error
Rock solid for 4 days straight. I’m declaring victory on this one. The answer is “stupid user error” (see comments above). A mutex should only be unlocked by the thread that locked it. Thanks for bearing with me.
glibc
Understanding “corrupted size vs. prev_size” glibc error
OK, so I’ve managed to overcome this issue. First of all – A practical cause to “corrupted size vs. prev_size” is quite simple – memory chunk control structure fields in the adjacent following chunk are being overwritten due to out-of-bounds access by the code. if you allocate x bytes for pointer p but wind up … Read more
glibc, glib and gnulib
glibc is a core C runtime library. It provides things like printf(3) and fopen(3). glib is an object-based event loop and utility library written in C. gnulib is a library that provides an adapter from the POSIX API to the native API. All three are used for completely different tasks.
GLIBCXX versions
Use readelf -a and objdump -x to inspect ELF files in preference to strings. Actually, all the GLIBCXX_* versions don’t apply to the entire library, but to each symbol (symbol versioning, see DSO-howto). So you can have e.g: std::char_traits<wchar_t>::eq@@GLIBCXX_3.4.5 and std::ios_base::Init::~Init()@@GLIBCXX_3.4 on the same library file. The fact that your program needs GLIBCXX_3.4.9 probably means … Read more
Error while importing Tensorflow in Python 2.7 in Ubuntu 12.04. ‘GLIBC_2.17 not found’
I’ve just managed to install tensorflow 0.12rc0 on CentOS 6.5 with glibc 2.12, without having root privileges. Simply installing tensorflow binary via pip was giving me an error, related to GLIBC version as well. Basically, you have 4 options how to deal with this (each with some advantages and disadvantages): Option 1 – Upgrade your … Read more
What is _GLIBCXX_USE_NANOSLEEP all about?
When libstdc++ is built its configure script tests your system to see what features are supported, and based on the results it defines (or undefines) various macros in c++config.h In your case configure determined that the POSIX nanosleep() function is not available and the macro is not defined. However, as you say, nanosleep() is available … Read more
What is __i686.get_pc_thunk.bx? Why do we need this call?
This call is used in position-independent code on x86. It loads the position of the code into the %ebx register, which allows global objects (which have a fixed offset from the code) to be accessed as an offset from that register. Position-independent code is code that can be loaded and executed, unmodified, at different addresses. … Read more
/lib/ld-linux.so.2: bad ELF interpreter: No such file or directory
yum install glibc.i686 install this.
building a .so that is also an executable
Update 2: see Andrew G Morgan’s slightly more complicated solution which does work for any GLIBC (that solution is also used in libc.so.6 itself (since forever), which is why you can run it as ./libc.so.6 (it prints version info when invoked that way)). Update 1: this no longer works with newer GLIBC versions: ./a.out: error … Read more
What’s the meaning of the %m formatting specifier?
m conversion specifier is not C but is a GNU extension to printf: From GNU documentation: http://www.gnu.org/software/libc/manual/html_node/Other-Output-Conversions.html The ‘%m’ conversion prints the string corresponding to the error code in errno. See Error Messages. Thus: fprintf (stderr, “can’t open `%s’: %m\n”, filename); is equivalent to: fprintf (stderr, “can’t open `%s’: %s\n”, filename, strerror (errno)); The ‘%m’ … Read more