Remove ArtMethod* parameter from dex cache entry points.
Load the ArtMethod* using an optimized stack walk instead.
This reduces the size of the generated code.
Three of the entry points are called only from a slow-path
and the fourth (InitializeTypeAndVerifyAccess) is rare and
already slow enough that the one or two extra loads
(depending on whether we already have the ArtMethod* in a
register) are insignificant. And as we're starting to use
PC-relative addressing of the dex cache arrays (already
done by Quick for the boot image), having the ArtMethod* in
a register becomes less likely anyway.
Change-Id: Ib19b9d204e355e13bf386662a8b158178bf8ad28
diff --git a/runtime/entrypoints/entrypoint_utils-inl.h b/runtime/entrypoints/entrypoint_utils-inl.h
index 64b7ecd..9292cff 100644
--- a/runtime/entrypoints/entrypoint_utils-inl.h
+++ b/runtime/entrypoints/entrypoint_utils-inl.h
@@ -22,6 +22,8 @@
#include "class_linker-inl.h"
#include "common_throws.h"
#include "dex_file.h"
+#include "entrypoints/quick/callee_save_frame.h"
+#include "handle_scope-inl.h"
#include "indirect_reference_table.h"
#include "invoke_type.h"
#include "jni_internal.h"
@@ -30,11 +32,31 @@
#include "mirror/class-inl.h"
#include "mirror/object-inl.h"
#include "mirror/throwable.h"
-#include "handle_scope-inl.h"
+#include "nth_caller_visitor.h"
+#include "runtime.h"
#include "thread.h"
namespace art {
+inline mirror::ArtMethod* GetCalleeSaveMethodCaller(Thread* self, Runtime::CalleeSaveType type)
+ SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
+ auto* refs_only_sp = self->GetManagedStack()->GetTopQuickFrame();
+ DCHECK_EQ(refs_only_sp->AsMirrorPtr(), Runtime::Current()->GetCalleeSaveMethod(type));
+
+ const size_t callee_frame_size = GetCalleeSaveFrameSize(kRuntimeISA, type);
+ auto* caller_sp = reinterpret_cast<StackReference<mirror::ArtMethod>*>(
+ reinterpret_cast<uintptr_t>(refs_only_sp) + callee_frame_size);
+ auto* caller = caller_sp->AsMirrorPtr();
+
+ if (kIsDebugBuild) {
+ NthCallerVisitor visitor(self, 1, true);
+ visitor.WalkStack();
+ CHECK(caller == visitor.caller);
+ }
+
+ return caller;
+}
+
template <const bool kAccessCheck>
ALWAYS_INLINE
inline mirror::Class* CheckObjectAlloc(uint32_t type_idx,