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view src/INSTALLami.txt @ 33815:08f9e1eac4cf v9.0.2123
patch 9.0.2123: Problem with initializing the length of range() lists
Commit: https://github.com/vim/vim/commit/df63da98d8dc284b1c76cfe1b17fa0acbd6094d8
Author: Christian Brabandt <cb@256bit.org>
Date: Thu Nov 23 20:14:28 2023 +0100
patch 9.0.2123: Problem with initializing the length of range() lists
Problem: Problem with initializing the length of range() lists
Solution: Set length explicitly when it shouldn't contain any items
range() may cause a wrong calculation of list length, which may later
then cause a segfault in list_find(). This is usually not a problem,
because range_list_materialize() calculates the length, when it
materializes the list.
In addition, in list_find() when the length of the range was wrongly
initialized, it may seem to be valid, so the check for list index
out-of-bounds will not be true, because it is called before the list is
actually materialized. And so we may eventually try to access a null
pointer, causing a segfault.
So this patch does 3 things:
- In f_range(), when we know that the list should be empty, explicitly
set the list->lv_len value to zero. This should happen, when
start is larger than end (in case the stride is positive) or
end is larger than start when the stride is negative.
This should fix the underlying issue properly. However,
- as a safety measure, let's check that the requested index is not
out of range one more time, after the list has been materialized
and return NULL in case it suddenly is.
- add a few more tests to verify the behaviour.
fixes: #13557
closes: #13563
Co-authored-by: Tim Pope <tpope@github.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
author | Christian Brabandt <cb@256bit.org> |
---|---|
date | Thu, 23 Nov 2023 20:30:07 +0100 |
parents | 591f210d9324 |
children |
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INSTALLami.txt - Installation of Vim from source on Amiga and MorphOS This file contains instructions for compiling Vim. If you already have an executable version of Vim, you don't need this. The file "feature.h" can be edited to match your preferences. You can skip this, then you will get the default behavior as is documented, which should be fine for most people. Summary: make -f Make_ami.mak gcc make -f Make_ami.mak CC=vc vbcc Please note that currently only gcc has been tested. VBCC would need its own CFLAGS, but should otherwise work out of the box. For cross-compiling, UNM can be used to override uname and thereby set the target. An example is shown below: make -f Make_ami.mak CC=ppc-morphos-gcc UNM=MorphOS