8278049: G1: add precondition to set_remainder_to_point_to_start
Reviewed-by: mli, tschatzl
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@ -1,5 +1,5 @@
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/*
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* Copyright (c) 2001, 2017, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2001, 2021, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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@ -97,14 +97,7 @@ void G1BlockOffsetTablePart::update() {
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// The arguments follow the normal convention of denoting
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// a right-open interval: [start, end)
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void G1BlockOffsetTablePart:: set_remainder_to_point_to_start(HeapWord* start, HeapWord* end) {
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if (start >= end) {
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// The start address is equal to the end address (or to
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// the right of the end address) so there are not cards
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// that need to be updated..
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return;
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}
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assert(start < end, "precondition");
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// Write the backskip value for each region.
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//
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// offset
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@ -149,9 +142,7 @@ void G1BlockOffsetTablePart:: set_remainder_to_point_to_start(HeapWord* start, H
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// a closed, inclusive interval: [start_card, end_card], cf set_remainder_to_point_to_start()
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// above.
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void G1BlockOffsetTablePart::set_remainder_to_point_to_start_incl(size_t start_card, size_t end_card) {
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if (start_card > end_card) {
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return;
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}
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assert(start_card <= end_card, "precondition");
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assert(start_card > _bot->index_for(_hr->bottom()), "Cannot be first card");
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assert(_bot->offset_array(start_card-1) <= BOTConstants::N_words,
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"Offset card has an unexpected value");
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