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44 lines
1.5 KiB
44 lines
1.5 KiB
/*
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* Copyright (C) 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ART_COMPILER_UTILS_STACK_CHECKS_H_
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#define ART_COMPILER_UTILS_STACK_CHECKS_H_
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#include "arch/instruction_set.h"
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namespace art {
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// Size of a frame that we definitely consider large. Anything larger than this should
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// definitely get a stack overflow check.
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static constexpr size_t kLargeFrameSize = 2 * KB;
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// Size of a frame that should be small. Anything leaf method smaller than this should run
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// without a stack overflow check.
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// The constant is from experience with frameworks code.
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static constexpr size_t kSmallFrameSize = 1 * KB;
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// Determine whether a frame is small or large, used in the decision on whether to elide a
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// stack overflow check on method entry.
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//
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// A frame is considered large when it's above kLargeFrameSize.
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static inline bool FrameNeedsStackCheck(size_t size, InstructionSet isa ATTRIBUTE_UNUSED) {
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return size >= kLargeFrameSize;
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}
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} // namespace art
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#endif // ART_COMPILER_UTILS_STACK_CHECKS_H_
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