Move image intern table into image
Previously we recreated this intern table during runtime startup.
This added 50-100ms of boot time.
Fixed bug where we didn't copy over hashcodes into the image.
Deleted some stale code.
(cherry picked from commit fac3a390a247fe33d4873773d742aad4cc100118)
Bug: 20727525
Bug: 19569780
Change-Id: I08959e9aa2a73cedb52f393033e2ffea3a26e76b
diff --git a/patchoat/patchoat.cc b/patchoat/patchoat.cc
index 007125c..0401727 100644
--- a/patchoat/patchoat.cc
+++ b/patchoat/patchoat.cc
@@ -437,6 +437,41 @@
}
}
+class FixupRootVisitor : public RootVisitor {
+ public:
+ explicit FixupRootVisitor(const PatchOat* patch_oat) : patch_oat_(patch_oat) {
+ }
+
+ void VisitRoots(mirror::Object*** roots, size_t count, const RootInfo& info ATTRIBUTE_UNUSED)
+ OVERRIDE SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
+ for (size_t i = 0; i < count; ++i) {
+ *roots[i] = patch_oat_->RelocatedAddressOfPointer(*roots[i]);
+ }
+ }
+
+ void VisitRoots(mirror::CompressedReference<mirror::Object>** roots, size_t count,
+ const RootInfo& info ATTRIBUTE_UNUSED)
+ OVERRIDE SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
+ for (size_t i = 0; i < count; ++i) {
+ roots[i]->Assign(patch_oat_->RelocatedAddressOfPointer(roots[i]->AsMirrorPtr()));
+ }
+ }
+
+ private:
+ const PatchOat* const patch_oat_;
+};
+
+void PatchOat::PatchInternedStrings(const ImageHeader* image_header) {
+ const auto& section = image_header->GetImageSection(ImageHeader::kSectionInternedStrings);
+ InternTable temp_table;
+ // Note that we require that ReadFromMemory does not make an internal copy of the elements.
+ // This also relies on visit roots not doing any verification which could fail after we update
+ // the roots to be the image addresses.
+ temp_table.ReadFromMemory(image_->Begin() + section.Offset());
+ FixupRootVisitor visitor(this);
+ temp_table.VisitRoots(&visitor, kVisitRootFlagAllRoots);
+}
+
void PatchOat::PatchDexFileArrays(mirror::ObjectArray<mirror::Object>* img_roots) {
auto* dex_caches = down_cast<mirror::ObjectArray<mirror::DexCache>*>(
img_roots->Get(ImageHeader::kDexCaches));
@@ -483,12 +518,9 @@
auto* img_roots = image_header->GetImageRoots();
image_header->RelocateImage(delta_);
- // Patch and update ArtFields.
PatchArtFields(image_header);
-
- // Patch and update ArtMethods.
PatchArtMethods(image_header);
-
+ PatchInternedStrings(image_header);
// Patch dex file int/long arrays which point to ArtFields.
PatchDexFileArrays(img_roots);