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{{Short description|Low-level debugger}}
The '''modular debugger''' ('''mdb''') is an extensible, low-level debugger developed by [[Sun Microsystems]] for the [[Solaris (operating system)|Solaris]] 7 operating system. It is now open sourced, under the [[Common Development and Distribution License]] (CDDL).
Its source code is now available in all open source derivatives of Solaris, such as [[Illumos]].<ref>{{cite web|url=http://src.illumos.org/source/xref/illumos-gate/usr/src/cmd/mdb/common/mdb/|title=mdb source in Illumos}}</ref>
==History==
The mdb project was started in 1997 by [[Mike Shapiro (programmer)|Mike Shapiro]] and others when the Solaris operating system was adding support for 64-bit architectures. Up until that point, Solaris was using the aging [[Advanced Debugger|adb]] debugger developed by [[Steve Bourne]] (initially for
It was very difficult to simply port adb from a 32-bit architecture to a 64-bit architecture, so Sun engineers decided to make a new debugger that would feature enhanced debugging capabilities, while being backward compatible with adb.
==See also==
*[[dbx (debugger)]]
==References==
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{{Solaris}}
[[Category:Debuggers]]
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