Fix vdex fast-verify performance regression
Recent CL I0d06b82e31088c58d4493723a5435309740f1d0c generalized the
fast-verify class redefinition check by checking that all vdex-verified
classes resolve to dex files covered by the vdex and are not duplicates
of classes in parent class loaders. This introduced a performance and
allocated memory regression for dex2oat invoked with
compiler-filter=verify(-profile).
This patch removes the regression by acquiring a list of classpath dex
files from the compiler driver and boot classpath dex files from the
class linker, avoiding class resolution altogether.
A small performance overhead remains as previously only boot classpath
was being searched.
Test: run `dex2oat filter=interpret-only; dex2oat filter=verify`
compare time and allocated memory numbers before CL and after
Change-Id: Ifd690cdafdc99d3eafb9847d67775fc11a5b5023
diff --git a/compiler/utils/atomic_dex_ref_map.h b/compiler/utils/atomic_dex_ref_map.h
index fc24379..a8c285f 100644
--- a/compiler/utils/atomic_dex_ref_map.h
+++ b/compiler/utils/atomic_dex_ref_map.h
@@ -54,6 +54,9 @@
void AddDexFile(const DexFile* dex_file);
void AddDexFiles(const std::vector<const DexFile*>& dex_files);
+ // Return a vector of all dex files which were added to the map.
+ std::vector<const DexFile*> GetDexFiles() const;
+
bool HaveDexFile(const DexFile* dex_file) const {
return arrays_.find(dex_file) != arrays_.end();
}