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Tries to perform superclass validation for classes that are resolved,
but not initialized at runtime. If successful, saves the result in the
oat file with a new class status. At runtime, the superclass validation
can be skipped during class initialization, saving some time and
reducing string accesses.
Results show savings of 50kB PSS in maps on startup, with slight
decrease in startup time.
Maps (average of 100 runs)
Before: dex 9941.3 odex 15159.8 total 25101.1 launch 908
After: dex 9897.4 odex 15155.7 total 25053.1 launch 906.6
Bug: 63456114
Test: mm test-art-host
Change-Id: If67a4a49d61781b6d561c26118d7e0c6b9cc0d6f
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Always print stack traces to System.out, and replace all
System.err.println()'s with System.out.println().
Follow-up of https://android-review.googlesource.com/#/c/187020/ and
https://android-review.googlesource.com/#/c/407032/.
Test: m test-art-host
m test-art-target
Change-Id: I9ab9cd955a8db25b2ec6673790e5bc924f62c88a
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Move Class to Class<?>, Constructor to Constructor<?>, and in
general clean up reflection.
Test: m test-art-host-run-test
Change-Id: I3a4223ee8d14d032015edf34bf27135757f7138c
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Oat files are usually produced standalone, and the compilers take
advantage of any information they get. It is thus possible that
when compile-time and runtime class-path are not the same, classes
are resolved differently and optimized code is incorrect.
This is a very conservative check, scanning the complete class tables
of dex files. In case any duplicate class is found, the new oat file
will be rejected and the original dex files will be used in interpreted
mode.
A possible refinement to this is actual tracking of the compile-time
class-path instead. That is however significantly complicated by the
DexFile API and the non-standard uses it allows.
An alternative for both optimized code and correct resolution is
native multidex. Apps should switch to multidex and benefit from
the optimization as well as the shift of all compile time to install
time. Split APKs are currently compiled separately, but it is a goal
to change that install flow to simulated multidex.
Change-Id: Ib9e0db5091e060e3bb2c0e5e6c007430becbfc21
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