DLADDR(3) Library Functions Manual DLADDR(3)

dladdrfind the image containing a given address

#include <dlfcn.h>

int
dladdr(const void* addr, Dl_info* info);

The () function queries dyld (the dynamic linker) for information about the image containing the address addr. The information is returned in the structure specified by info. The structure contains at least the following members:

The pathname of the shared object containing the address.
The base address (mach_header) at which the image is mapped into the address space of the calling process.
The name of the nearest run-time symbol with a value less than or equal to addr.
The value of the symbol returned in dli_sname.

The () function is available only in dynamically linked programs.

If an image containing addr cannot be found, dladdr() returns 0. On success, a non-zero value is returned.

If the image containing addr is found, but no nearest symbol was found, the dli_sname and dli_saddr fields are set to NULL.

dyld(3), dlopen(3)

The dladdr() function first appeared in the Solaris operating system.

Mac OS X 10.3 incorporated the dlcompat package written by Jorge Acereda <jacereda@users.sourceforge.net> and Peter O'Gorman <ogorman@users.sourceforge.net>.

In Mac OS X 10.4, dlopen was rewritten to be a native part of dyld.

This man page was borrowed from FreeBSD and modified.

This implementation is almost bug-compatible with the Solaris implementation. The following bugs are present:

September 24, 2004 Mac OS X 12