tree 4aa0c8e5b94d2cdd1e4dfa2caa7420cead3239ee
parent c11a58e7013e0f8cc59eb6eb02fe3366e625665a
author Yabin Cui <yabinc@google.com> 1480461673 -0800
committer Yabin Cui <yabinc@google.com> 1480461673 -0800

simpleperf: fix tests for dwarf callgraph unwinding.

32-bit simpleperf can't unwind a 64-bit `sleep` process in aarch64
environment. It makes following error in tests:
simpleperf is built in arch arm, and can't do stack unwinding for arch arm64

So make the workload be able to start a process
running callback function. By profiling that process, we can
guarantee that 32-bit simpleperf is profiling a 32-bit process.

Also fix a flaky test IOEventLoop.signal.
Build 32-bit simpleperf_unit_test on 64-bit devices.

Bug: http://b/33167911
Test: run simpleperf_unit_test.
Change-Id: I82741dc5d90c73c1890f834d8e2a9188421a3828