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/*
* Copyright (C) 2014 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_STACK_CHECKS_H_
#define ART_COMPILER_UTILS_STACK_CHECKS_H_
#include "arch/instruction_set.h"
namespace art {
// Size of a frame that we definitely consider large. Anything larger than this should
// definitely get a stack overflow check.
static constexpr size_t kLargeFrameSize = 2 * KB;
// Size of a frame that should be small. Anything leaf method smaller than this should run
// without a stack overflow check.
// The constant is from experience with frameworks code.
static constexpr size_t kSmallFrameSize = 1 * KB;
// Determine whether a frame is small or large, used in the decision on whether to elide a
// stack overflow check on method entry.
//
// A frame is considered large when it's above kLargeFrameSize.
static inline bool FrameNeedsStackCheck(size_t size, InstructionSet isa ATTRIBUTE_UNUSED) {
return size >= kLargeFrameSize;
}
} // namespace art
#endif // ART_COMPILER_UTILS_STACK_CHECKS_H_
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