ART: Compress LengthPrefixedArray on 32-bit targets.
Previously, the LengthPrefixedArray<ArtMethod> on 32-bit
targets contained a 64-bit length field followed by the
ArtMethod elements with size only a multiple of 4, not 8.
Consequently, an odd-length array broke the alignment for
the following array which would have the 64-bit length
placed at an unaligned address.
To fix that, we make the length field 32-bit and explicitly
pass the alignment information to the LengthPrefixedArray.
This also makes the 32-bit boot image a bit smaller.
On Nexus 5, AOSP, ToT, the field section is 11528B smaller
and the method section is 21036B smaller. 64-bit targets
should see the same savings for the field section but no
difference for the methods section.
Change-Id: I3e03e7b94129025c8a1c117c27645a34dec516d2
diff --git a/runtime/image.h b/runtime/image.h
index eb26f7f..1a0d8fd 100644
--- a/runtime/image.h
+++ b/runtime/image.h
@@ -65,7 +65,7 @@
}
// Visit ArtMethods in the section starting at base.
- void VisitPackedArtMethods(ArtMethodVisitor* visitor, uint8_t* base, size_t method_size) const;
+ void VisitPackedArtMethods(ArtMethodVisitor* visitor, uint8_t* base, size_t pointer_size) const;
// Visit ArtMethods in the section starting at base.
void VisitPackedArtFields(ArtFieldVisitor* visitor, uint8_t* base) const;