ART: PathClassLoader for compiler

Use an actual PathClassLoader when compiling apps, instead of a
side structure and cutout.

This CL sets up a minimal object 'cluster' that recreates the Java
side of a regular ClassLoader such that the Class-Linker will
recognize it and use the internal native fast-path.

This CL removes the now unnecessary compile-time-classpath and
replaces it with a single 'compiling-the-boot-image' flag in the
compiler callbacks.

Note: This functionality is *only* intended for the compiler, as
the objects have not been completely initialized.

Bug: 19781184

Change-Id: I7f36af12dd7852d21281110a25c119e8c0669c1d

1 files changed, 4 insertions, 2 deletions

diff --git a/runtime/jni_internal.cc b/runtime/jni_internal.cc
index 6063e1e..566b097 100644
--- a/runtime/jni_internal.cc
+++ b/runtime/jni_internal.cc
@@ -164,8 +164,10 @@ static mirror::ClassLoader* GetClassLoader(const ScopedObjectAccess& soa)
   // See if the override ClassLoader is set for gtests.
   class_loader = soa.Decode<mirror::ClassLoader*>(soa.Self()->GetClassLoaderOverride());
   if (class_loader != nullptr) {
-    // If so, CommonCompilerTest should have set UseCompileTimeClassPath.
-    CHECK(Runtime::Current()->UseCompileTimeClassPath());
+    // If so, CommonCompilerTest should have marked the runtime as a compiler not compiling an
+    // image.
+    CHECK(Runtime::Current()->IsAotCompiler());
+    CHECK(!Runtime::Current()->GetCompilerCallbacks()->IsBootImage());
     return class_loader;
   }
   // Use the BOOTCLASSPATH.