Add fast path for FindClass using the type dex file.
If we are using the PathClassLoader with a BootClassLoader
parent, we can handle the common case in the FindClass function
without needing to go back to java code.
Around 10% speedup measured of maps launch, could be noise due to
large variation of app launch times. Eliminates defineClassNative
from being anywhere near the top of sampling profiles.
Bug: 17397179
Bug: 16828525
(cherry picked from commit 8a39e7fe02e9a81853dc7a75cb50d9ece07a9b37)
Change-Id: I1f31de76c1b1a53e32173b1e61a59b0e2f267c98
diff --git a/runtime/mirror/class_loader.h b/runtime/mirror/class_loader.h
index f3594e4..ff2ad89 100644
--- a/runtime/mirror/class_loader.h
+++ b/runtime/mirror/class_loader.h
@@ -32,6 +32,9 @@
static constexpr uint32_t InstanceSize() {
return sizeof(ClassLoader);
}
+ ClassLoader* GetParent() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
+ return GetFieldObject<ClassLoader>(OFFSET_OF_OBJECT_MEMBER(ClassLoader, parent_));
+ }
private:
// Field order required by test "ValidateFieldOrderOfJavaCppUnionClasses".