Jason Evans 9f949f9d82 Revert "Add support for libunwind backtrace caching."
This reverts commit adc675c8ef55b59bb2facf795a3c26411cfbf3ed.

The original commit added support for a non-standard libunwind API, so
it was not of general utility.
2011-03-22 20:44:40 -07:00
..