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Libc: Difference between revisions
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same name contained in libraries that have already been loaded. | same name contained in libraries that have already been loaded. | ||
This flag is not specified in POSIX.1-2001.</pre> | This flag is not specified in POSIX.1-2001.</pre> | ||
==Generating a stack trace== | |||
The <tt>backtrace</tt>, <tt>backtrace_symbols</tt> and <tt>backtrace_symbols_fd</tt> glibc calls can be used to generate a stack trace from within a program. | |||
* <tt>backtrace</tt> generates a list of addresses | |||
* <tt>backtrace_symbols</tt>, given the output of <tt>backtrace</tt>, will populate its argv-style return value with any symbols it can look up | |||
In order to extract symbols, appropriate binaries must: | |||
* not be stripped (or linked with -s), and | |||
* be linked with -rdynamic/--export-dynamic | |||
