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Top Forums Programming -Warray-bounds option to GCC compiler Post 303013012 by milhan on Tuesday 13th of February 2018 05:13:27 PM
Old 02-13-2018
-Warray-bounds option to GCC compiler

What exactly is the -Warray-bounds option to the GCC compiler supposed to warn about?
the man page states:
Quote:
-Warray-bounds
-Warray-bounds=n
This option is only active when -ftree-vrp is active (default for -O2 and above). It warns
about subscripts to arrays that are always out of bounds. This warning is enabled by -Wall.

-Warray-bounds=1
This is the warning level of -Warray-bounds and is enabled by -Wall; higher levels are
not, and must be explicitly requested.

-Warray-bounds=2
This warning level also warns about out of bounds access for arrays at the end of a
struct and for arrays accessed through pointers. This warning level may give a larger
number of false positives and is deactivated by default.
Code:
~ g++ --version
g++ (GCC) 7.3.1 20180130 (Red Hat 7.3.1-2)
Copyright (C) 2017 Free Software Foundation, Inc.

Thank you.
 

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Binary.setBlockData(3kaya)				       Kaya module reference					Binary.setBlockData(3kaya)

NAME
Binary::setBlockData - Set the contents of a block. SYNOPSIS
Void setBlockData( var Binary block, Int offset, [Int] bdata ) ARGUMENTS
block The binary block offset The offset to start at (zero-indexed) bdata The data to write, as an array of Int s DESCRIPTION
Set the contents of (part of) a block from an array. An Binary.OffsetOutOfRange(3kaya) Exception will be thrown if this would cause a write outside the bounds of the block. The following bits of code are equivalent: setBlockData(block,offset,bdata); // is equivalent to for byte@idx in bdata { poke(block,offset+idx,byte); } However, setBlockData is more efficient and checks bounds before any data is written - the above for loop could write partial data if off- set+idx was greater than blockSize(block) AUTHORS
Kaya standard library by Edwin Brady, Chris Morris and others (kaya@kayalang.org). For further information see http://kayalang.org/ LICENSE
The Kaya standard library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License (version 2.1 or any later version) as published by the Free Software Foundation. RELATED
Binary.Binary(3kaya) Binary.array(3kaya) Binary.copyBlock(3kaya) Binary.getBlockChunk(3kaya) Binary.poke(3kaya) Binary.pokeString(3kaya) Kaya October 2012 Binary.setBlockData(3kaya)
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