/*
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ART_COMPILER_UTILS_ARM_JNI_MACRO_ASSEMBLER_ARM_VIXL_H_
#define ART_COMPILER_UTILS_ARM_JNI_MACRO_ASSEMBLER_ARM_VIXL_H_
#include <android-base/logging.h>
#include "base/arena_containers.h"
#include "base/macros.h"
#include "constants_arm.h"
#include "offsets.h"
#include "utils/arm/assembler_arm_shared.h"
#include "utils/arm/assembler_arm_vixl.h"
#include "utils/arm/managed_register_arm.h"
#include "utils/assembler.h"
#include "utils/jni_macro_assembler.h"
namespace art {
namespace arm {
class ArmVIXLJNIMacroAssembler final
: public JNIMacroAssemblerFwd<ArmVIXLAssembler, PointerSize::k32> {
private:
class ArmException;
public:
explicit ArmVIXLJNIMacroAssembler(ArenaAllocator* allocator)
: JNIMacroAssemblerFwd(allocator),
exception_blocks_(allocator->Adapter(kArenaAllocAssembler)) {}
virtual ~ArmVIXLJNIMacroAssembler() {}
void FinalizeCode() override;
//
// Overridden common assembler high-level functionality
//
// Emit code that will create an activation on the stack.
void BuildFrame(size_t frame_size,
ManagedRegister method_reg,
ArrayRef<const ManagedRegister> callee_save_regs,
const ManagedRegisterEntrySpills& entry_spills) override;
// Emit code that will remove an activation from the stack.
void RemoveFrame(size_t frame_size,
ArrayRef<const ManagedRegister> callee_save_regs,
bool may_suspend) override;
void IncreaseFrameSize(size_t adjust) override;
void DecreaseFrameSize(size_t adjust) override;
// Store routines.
void Store(FrameOffset offs, ManagedRegister src, size_t size) override;
void StoreRef(FrameOffset dest, ManagedRegister src) override;
void StoreRawPtr(FrameOffset dest, ManagedRegister src) override;
void StoreImmediateToFrame(FrameOffset dest, uint32_t imm, ManagedRegister scratch) override;
void StoreStackOffsetToThread(ThreadOffset32 thr_offs,
FrameOffset fr_offs,
ManagedRegister scratch) override;
void StoreStackPointerToThread(ThreadOffset32 thr_offs) override;
void StoreSpanning(FrameOffset dest,
ManagedRegister src,
FrameOffset in_off,
ManagedRegister scratch) override;
// Load routines.
void Load(ManagedRegister dest, FrameOffset src, size_t size) override;
void LoadFromThread(ManagedRegister dest,
ThreadOffset32 src,
size_t size) override;
void LoadRef(ManagedRegister dest, FrameOffset src) override;
void LoadRef(ManagedRegister dest,
ManagedRegister base,
MemberOffset offs,
bool unpoison_reference) override;
void LoadRawPtr(ManagedRegister dest, ManagedRegister base, Offset offs) override;
void LoadRawPtrFromThread(ManagedRegister dest, ThreadOffset32 offs) override;
// Copying routines.
void Move(ManagedRegister dest, ManagedRegister src, size_t size) override;
void CopyRawPtrFromThread(FrameOffset fr_offs,
ThreadOffset32 thr_offs,
ManagedRegister scratch) override;
void CopyRawPtrToThread(ThreadOffset32 thr_offs,
FrameOffset fr_offs,
ManagedRegister scratch) override;
void CopyRef(FrameOffset dest, FrameOffset src, ManagedRegister scratch) override;
void Copy(FrameOffset dest, FrameOffset src, ManagedRegister scratch, size_t size) override;
void Copy(FrameOffset dest,
ManagedRegister src_base,
Offset src_offset,
ManagedRegister scratch,
size_t size) override;
void Copy(ManagedRegister dest_base,
Offset dest_offset,
FrameOffset src,
ManagedRegister scratch,
size_t size) override;
void Copy(FrameOffset dest,
FrameOffset src_base,
Offset src_offset,
ManagedRegister scratch,
size_t size) override;
void Copy(ManagedRegister dest,
Offset dest_offset,
ManagedRegister src,
Offset src_offset,
ManagedRegister scratch,
size_t size) override;
void Copy(FrameOffset dest,
Offset dest_offset,
FrameOffset src,
Offset src_offset,
ManagedRegister scratch,
size_t size) override;
// Sign extension.
void SignExtend(ManagedRegister mreg, size_t size) override;
// Zero extension.
void ZeroExtend(ManagedRegister mreg, size_t size) override;
// Exploit fast access in managed code to Thread::Current().
void GetCurrentThread(ManagedRegister mtr) override;
void GetCurrentThread(FrameOffset dest_offset,
ManagedRegister scratch) override;
// Set up out_reg to hold a Object** into the handle scope, or to be null if the
// value is null and null_allowed. in_reg holds a possibly stale reference
// that can be used to avoid loading the handle scope entry to see if the value is
// null.
void CreateHandleScopeEntry(ManagedRegister out_reg,
FrameOffset handlescope_offset,
ManagedRegister in_reg,
bool null_allowed) override;
// Set up out_off to hold a Object** into the handle scope, or to be null if the
// value is null and null_allowed.
void CreateHandleScopeEntry(FrameOffset out_off,
FrameOffset handlescope_offset,
ManagedRegister scratch,
bool null_allowed) override;
// src holds a handle scope entry (Object**) load this into dst.
void LoadReferenceFromHandleScope(ManagedRegister dst,
ManagedRegister src) override;
// Heap::VerifyObject on src. In some cases (such as a reference to this) we
// know that src may not be null.
void VerifyObject(ManagedRegister src, bool could_be_null) override;
void VerifyObject(FrameOffset src, bool could_be_null) override;
// Call to address held at [base+offset].
void Call(ManagedRegister base, Offset offset, ManagedRegister scratch) override;
void Call(FrameOffset base, Offset offset, ManagedRegister scratch) override;
void CallFromThread(ThreadOffset32 offset, ManagedRegister scratch) override;
// Generate code to check if Thread::Current()->exception_ is non-null
// and branch to a ExceptionSlowPath if it is.
void ExceptionPoll(ManagedRegister scratch, size_t stack_adjust) override;
// Create a new label that can be used with Jump/Bind calls.
std::unique_ptr<JNIMacroLabel> CreateLabel() override;
// Emit an unconditional jump to the label.
void Jump(JNIMacroLabel* label) override;
// Emit a conditional jump to the label by applying a unary condition test to the register.
void Jump(JNIMacroLabel* label, JNIMacroUnaryCondition cond, ManagedRegister test) override;
// Code at this offset will serve as the target for the Jump call.
void Bind(JNIMacroLabel* label) override;
void MemoryBarrier(ManagedRegister scratch) override;
void EmitExceptionPoll(ArmVIXLJNIMacroAssembler::ArmException *exception);
void Load(ArmManagedRegister dest, vixl32::Register base, int32_t offset, size_t size);
private:
class ArmException {
private:
ArmException(ArmManagedRegister scratch, size_t stack_adjust)
: scratch_(scratch), stack_adjust_(stack_adjust) {}
vixl32::Label* Entry() { return &exception_entry_; }
// Register used for passing Thread::Current()->exception_ .
const ArmManagedRegister scratch_;
// Stack adjust for ExceptionPool.
const size_t stack_adjust_;
vixl32::Label exception_entry_;
friend class ArmVIXLJNIMacroAssembler;
DISALLOW_COPY_AND_ASSIGN(ArmException);
};
// List of exception blocks to generate at the end of the code cache.
ArenaVector<std::unique_ptr<ArmVIXLJNIMacroAssembler::ArmException>> exception_blocks_;
// Used for testing.
friend class ArmVIXLAssemblerTest_VixlLoadFromOffset_Test;
friend class ArmVIXLAssemblerTest_VixlStoreToOffset_Test;
};
class ArmVIXLJNIMacroLabel final
: public JNIMacroLabelCommon<ArmVIXLJNIMacroLabel,
vixl32::Label,
InstructionSet::kArm> {
public:
vixl32::Label* AsArm() {
return AsPlatformLabel();
}
};
} // namespace arm
} // namespace art
#endif // ART_COMPILER_UTILS_ARM_JNI_MACRO_ASSEMBLER_ARM_VIXL_H_