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42effb5bbf
MozReview-Commit-ID: EZZrYF1W81B --HG-- extra : rebase_source : 30eea607d07ac819a0e55a2c4b0f8c359c156705
37 lines
1.2 KiB
C++
37 lines
1.2 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include <string.h>
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#include "nsTArray.h"
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#include "nsXPCOM.h"
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#include "nsDebug.h"
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#include "mozilla/CheckedInt.h"
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nsTArrayHeader nsTArrayHeader::sEmptyHdr = { 0, 0, 0 };
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bool
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IsTwiceTheRequiredBytesRepresentableAsUint32(size_t aCapacity, size_t aElemSize)
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{
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using mozilla::CheckedUint32;
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return ((CheckedUint32(aCapacity) * aElemSize) * 2).isValid();
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}
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MOZ_NORETURN MOZ_COLD void
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InvalidArrayIndex_CRASH(size_t aIndex, size_t aLength)
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{
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const size_t CAPACITY = 512;
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// Leak the buffer on the heap to make sure that it lives long enough, as
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// MOZ_CRASH_ANNOTATE expects the pointer passed to it to live to the end of
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// the program.
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auto* buffer = new char[CAPACITY];
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snprintf(buffer, CAPACITY,
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"ElementAt(aIndex = %llu, aLength = %llu)",
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(long long unsigned) aIndex,
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(long long unsigned) aLength);
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MOZ_CRASH_ANNOTATE(buffer);
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MOZ_REALLY_CRASH();
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}
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