commit 0ae15326456aaab7717c09b07eaf2d766dbaadda
author Igor Murashkin <iam@google.com> Thu Sep 14 13:55:06 2017 -0700
committer Igor Murashkin <iam@google.com> Fri Sep 15 10:22:18 2017 -0700
tree b323ea082a55dacaf348ad3f687cec536b66997b
parent 6b411fc9fd94da3c552d8b96cee14f6414e7b734

tools: Add new titrace tool to print dynamic instruction counts

Implemented on top of the Tooling Interface (jvmti.h) and works on both
RI and ART (host/target). See README.md for more details.

Example usage:

$> make libtitrace
$> java -agentpath:out/host/linux-x86/lib64/libtitrace.so helloworld
  Hello
  ================================================
                 TI Trace // Summary
  ++++++++++++++++++++++++++++++++++++++++++++++++
     * Single step counter: 405982
  +++++++++++    Instructions Count   ++++++++++++
     * aconst_null(op:1), count: 734, % of total: 0.180796
     * iconst_m1(op:2), count: 470, % of total: 0.115769
     * iconst_0(op:3), count: 4246, % of total: 1.04586
     * iconst_1(op:4), count: 3585, % of total: 0.883044
     * iconst_2(op:5), count: 1068, % of total: 0.263066
     ............

Test: manual
Change-Id: I0cd1f4f88e54cf8612641128230b8e93157b48ea