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Not all runtime types can be encoded in the profile. For example if the
receiver type is in a dex file which is not tracked for profiling its
type cannot be encoded.
Previously we would just skip over these types but that can lead to
encode a polymorphic inline cache when in fact it should be megamorphic.
With this CL, inline caches for which types are missing are marked in
the profile with a special bit, kIsMissingTypesEncoding.
Also, extend profman to understand text lines which specify an inline
cache with missing types.
Test: test-art-host
Bug: 35927981
Bug: 32434870
Change-Id: I34528a39c227f3133771fd4454701c1ddc234f40
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Extend profman logic to generate profiles based on a simple textual
respresentation. This will help writing tests for profile guided
compilation.
Before this CL, profman was able to generate profiles based on a list of
classes like:
java.lang.Comparable
java.lang.Math
java.lang.Object
This CL, enables profman to understand methods and classes alike. The
new format is:
# Classes
Ljava/lang/Comparable;
Ljava/lang/Math;
# Methods with inline caches
LTestInline;->inlinePolymorhic(LSuper;)I+LSubA;,LSubB;,LSubC;
LTestInline;->noInlineCache(LSuper;)I
"LTestInline;->inlinePolymorhic(LSuper;)I+LSubA;,LSubB;,LSubC;"
means that method `int inlineMonomorphicSubA(Super)` from class Main
will be added to the profile with the inline cache (SubA,SubB) for its
one and only invoke virtual.
@Main#noInlineCache:(LSuper;)I+;
meaning that method `int noInlineCache' from class Main will be added
to the profile with no inline cache.
Note that the methods are allowed to have a single invoke virtual in
their dex bytecode. That is to keep the parsing the file format
simple and easy to use.
Also, add a few more tests for profiles and fix an issue caused by
writing the dex files in a possibly wrong order.
Test: m run-test-host-gtest-profile_assistant_test
Bug: 32434870
Change-Id: I6b7340cf613007117d9818be206ccb3a27b815bf
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- allow file descriptors in addition to file names for profiles
- fix some minor issues (wrong comparison signs, unhandled errors)
- added gtests for profile_compilation_info, profile_assistant
and compiler_driver
Bug: 26080105
Change-Id: I136039fa1f25858399000049e48b01eafae54eb1
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