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9db234ad09
When configured with either 'symlinks' or 'shebangs' as value for the --enable-single-binary option, tests based on `ulimit -v` are skipped. The reason is that the multicall 'coreutils' binary requires much more memory due to shared libraries being loaded, and the size of the 'date' binary (~290KiB) compared to the multicall binary (~5MiB), of course. Finally, in the case of 'shebangs', the starting shell requires more memory, too Instead of using hard-coded values for the memory limit, use an adaptive approach: first determine the amount of memory for a similar, yet more trivial invocation of the command, and then do the real test run using that limit (plus some buffer in some cases). * init.cfg (require_ulimit_v_): Remove function. (get_min_ulimit_v_): Add function to determine the minimum memory limit required for a given command in an adaptive way. * cfg.mk (sc_prohibit_test_ulimit_without_require_): Change the name of the above function in the syntax-check rule. * tests/cp/link-heap.sh: Use the above function to determine the minimum memory required to run a command simpler than in the real test run. Use that limit plus a buffer there. While at it, change to list of commands in the subshell to fail also if the beginning `ulimit -v` fails. * tests/dd/no-allocate.sh: Likewise. * tests/misc/csplit-heap.sh: Likewise. * tests/misc/cut-huge-range.sh: Likewise. * tests/misc/head-c.sh: Likewise. * tests/misc/printf-surprise.sh: Likewise. * tests/split/line-bytes.sh: Likewise. * tests/rm/many-dir-entries-vs-OOM.sh: Likewise - doing it separately for each program under test.
77 lines
2.4 KiB
Bash
Executable File
77 lines
2.4 KiB
Bash
Executable File
#!/bin/sh
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# make sure that dd doesn't allocate memory unnecessarily
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# Copyright (C) 2013-2015 Free Software Foundation, Inc.
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
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print_ver_ dd
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# Determine basic amount of memory needed.
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echo . > f || framework_failure_
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vm=$(get_min_ulimit_v_ dd if=f of=f2 status=none) \
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|| skip_ "this shell lacks ulimit support"
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rm -f f || framework_failure_
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# count and skip are zero, we don't need to allocate memory
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(ulimit -v $vm && dd bs=30M count=0) || fail=1
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(ulimit -v $vm && dd ibs=30M count=0) || fail=1
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(ulimit -v $vm && dd obs=30M count=0) || fail=1
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check_dd_seek_alloc() {
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local file="$1"
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local buf="$2"
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test "$file" = 'in' && { dd_file=if; dd_op=skip; }
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test "$file" = 'out' && { dd_file=of; dd_op=seek; }
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test "$buf" = 'in' && { dd_buf=ibs; }
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test "$buf" = 'out' && { dd_buf=obs; }
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test "$buf" = 'both' && { dd_buf=bs; }
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# Provide input to the "tape"
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timeout 10 dd count=1 if=/dev/zero of=tape&
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# Allocate buffer and read from the "tape"
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(ulimit -v $(($vm+4000)) \
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&& timeout 10 dd $dd_buf=30M $dd_op=1 count=0 $dd_file=tape)
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local ret=$?
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# Be defensive in case the tape reader is blocked for some reason
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test $ret = 124 && framework_failure_
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# This should happen without delay,
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# and is used to ensure we've not multiple writers to the "tape"
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wait
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# We want the "tape" reader to fail iff allocating
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# a large buffer corresponding to the file being read
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case "$file$buf" in
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inout|outin) test $ret = 0;;
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*) test $ret != 0;;
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esac
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}
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# Use a fifo for which seek fails, but read does not.
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# For non seekable output we need to allocate a buffer
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# when simulating seeking with a read.
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if mkfifo tape; then
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for file in 'in' 'out'; do
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for buf in 'both' 'in' 'out'; do
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check_dd_seek_alloc "$file" "$buf" || fail=1
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done
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done
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fi
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Exit $fail
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