David Srbecky 12d902961b Cache DWARF location rules for a given pc. ... Decoding the DWARF opcodes is expensive so make sure we cache it. This speeds unwinding in simpleperf by over a factor of 3x. Add unit tests for this new behavior. Bug: 77258731 Test: libbacktrace/libunwindstack unit tests on host and target. Test: Ran debuggerd -b on various processes on target. Change-Id: Ia516c0fa5d3e5f76746190bb4b6fdf49fd1c9388 (cherry picked from commit 3386ebade2)		2018-03-29 08:47:49 -07:00
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unwindstack	Cache DWARF location rules for a given pc.	2018-03-29 08:47:49 -07:00