Adds Runtime call stub and Dart entry stub to ARM64.

runtime/vm/stub_code_arm64_test.cc

Index: runtime/vm/stub_code_arm64_test.cc
===================================================================
--- runtime/vm/stub_code_arm64_test.cc	(revision 35189)
+++ runtime/vm/stub_code_arm64_test.cc	(working copy)
@@ -5,6 +5,111 @@
 #include "vm/globals.h"
 #if defined(TARGET_ARCH_ARM64)
 
-// TODO(zra): Port these tests.
+#include "vm/isolate.h"
+#include "vm/dart_entry.h"
+#include "vm/native_entry.h"
+#include "vm/native_entry_test.h"
+#include "vm/object.h"
+#include "vm/runtime_entry.h"
+#include "vm/stub_code.h"
+#include "vm/symbols.h"
+#include "vm/unit_test.h"
 
+#define __ assembler->
+
+namespace dart {
+
+DECLARE_RUNTIME_ENTRY(TestSmiSub);
+DECLARE_LEAF_RUNTIME_ENTRY(RawObject*, TestLeafSmiAdd, RawObject*, RawObject*);
+
+
+static Function* CreateFunction(const char* name) {
+  const String& class_name = String::Handle(Symbols::New("ownerClass"));
+  const Script& script = Script::Handle();
+  const Class& owner_class =
+      Class::Handle(Class::New(class_name, script, Scanner::kNoSourcePos));
+  const Library& lib = Library::Handle(Library::New(class_name));
+  owner_class.set_library(lib);
+  const String& function_name = String::ZoneHandle(Symbols::New(name));
+  Function& function = Function::ZoneHandle(
+      Function::New(function_name, RawFunction::kRegularFunction,
+                    true, false, false, false, false, owner_class, 0));
+  return &function;
+}
+
+
+// Test calls to stub code which calls into the runtime.
+static void GenerateCallToCallRuntimeStub(Assembler* assembler,
+                                          int value1, int value2) {
+  const int argc = 2;
+  const Smi& smi1 = Smi::ZoneHandle(Smi::New(value1));
+  const Smi& smi2 = Smi::ZoneHandle(Smi::New(value2));
+  const Object& result = Object::ZoneHandle();
+  const Context& context = Context::ZoneHandle(Context::New(0, Heap::kOld));
+  ASSERT(context.isolate() == Isolate::Current());
+  __ EnterDartFrame(0);
+  __ LoadObject(CTX, context, PP);
+  __ PushObject(result, PP);  // Push Null object for return value.
+  __ PushObject(smi1, PP);  // Push argument 1 smi1.
+  __ PushObject(smi2, PP);  // Push argument 2 smi2.
+  ASSERT(kTestSmiSubRuntimeEntry.argument_count() == argc);
+  __ CallRuntime(kTestSmiSubRuntimeEntry, argc);  // Call SmiSub runtime func.
+  __ add(SP, SP, Operand(argc * kWordSize));
+  __ Pop(R0);  // Pop return value from return slot.
+  __ LeaveDartFrame();
+  __ ret();
+}
+
+
+TEST_CASE(CallRuntimeStubCode) {
+  extern const Function& RegisterFakeFunction(const char* name,
+                                              const Code& code);
+  const int value1 = 10;
+  const int value2 = 20;
+  const char* kName = "Test_CallRuntimeStubCode";
+  Assembler _assembler_;
+  GenerateCallToCallRuntimeStub(&_assembler_, value1, value2);
+  const Code& code = Code::Handle(Code::FinalizeCode(
+      *CreateFunction("Test_CallRuntimeStubCode"), &_assembler_));
+  const Function& function = RegisterFakeFunction(kName, code);
+  Smi& result = Smi::Handle();
+  result ^= DartEntry::InvokeFunction(function, Object::empty_array());
+  EXPECT_EQ((value1 - value2), result.Value());
+}
+
+
+// Test calls to stub code which calls into a leaf runtime entry.
+static void GenerateCallToCallLeafRuntimeStub(Assembler* assembler,
+                                              int value1,
+                                              int value2) {
+  const Smi& smi1 = Smi::ZoneHandle(Smi::New(value1));
+  const Smi& smi2 = Smi::ZoneHandle(Smi::New(value2));
+  __ EnterDartFrame(0);
+  __ ReserveAlignedFrameSpace(0);
+  __ LoadObject(R0, smi1, PP);  // Set up argument 1 smi1.
+  __ LoadObject(R1, smi2, PP);  // Set up argument 2 smi2.
+  __ CallRuntime(kTestLeafSmiAddRuntimeEntry, 2);  // Call SmiAdd runtime func.
+  __ LeaveDartFrame();
+  __ ret();  // Return value is in R0.
+}
+
+
+TEST_CASE(CallLeafRuntimeStubCode) {
+  extern const Function& RegisterFakeFunction(const char* name,
+                                              const Code& code);
+  const int value1 = 10;
+  const int value2 = 20;
+  const char* kName = "Test_CallLeafRuntimeStubCode";
+  Assembler _assembler_;
+  GenerateCallToCallLeafRuntimeStub(&_assembler_, value1, value2);
+  const Code& code = Code::Handle(Code::FinalizeCode(
+      *CreateFunction("Test_CallLeafRuntimeStubCode"), &_assembler_));
+  const Function& function = RegisterFakeFunction(kName, code);
+  Smi& result = Smi::Handle();
+  result ^= DartEntry::InvokeFunction(function, Object::empty_array());
+  EXPECT_EQ((value1 + value2), result.Value());
+}
+
+}  // namespace dart
+
 #endif  // defined TARGET_ARCH_ARM64