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#!/bin/sh - |
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# |
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# Script to reduce a test case down to a smaller set by deleting |
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# lines. |
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# Start by making the file into a single file via: |
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# cc -E -o newcfile.c -c inputfile.c |
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# |
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# Update the script w/ the compile command that will test for the |
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# failiure you're looking for. It is at the line marked UPDATE ME. |
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# |
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# And then run the script: |
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# sh test.case.reduce.sh newcfile.c |
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# |
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# After the run, it'll report how many lines were dropped, and |
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# the final test case will be named test.c. |
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# |
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# This isn't perfect (I know there is a better tool out there, but |
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# I can't remember/find it) in that it leaves blocks of code that |
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# are multiple lines where any one removed causes an error when |
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# compiling. This can be delt w/ by hand at the end as it's a bit |
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# easier, but could be improved by trying to delete n lines instead |
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# of just 1 for increasing n (or maybe decreasing n?). |
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# |
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# In my test case of reducing, it took a 2163 line file down to |
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# 313 befor manually reducing it to 18 lines. |
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cp "$1" "test.c" |
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totdroppedlines=0 |
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droppedlines=1 |
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while [ $droppedlines -ne 0 ]; do |
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droppedlines=0 |
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i=0 |
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while :; do |
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linecount=$(wc -l < test.c) |
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if [ $i -eq $linecount ]; then |
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break |
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fi |
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while [ $i -lt $linecount ]; do |
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# try to delete next line |
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(if [ $i -gt 0 ]; then head -n $i test.c; fi; tail -n +$(($i + 2)) test.c ) > curtest.c |
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#echo curtest line count: $(wc -l < curtest.c) |
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# modify this function such that when the test case |
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# still "fails" that it returns success. |
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# |
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# In this case, we are checking for a specific |
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# error message. |
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# |
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# ====== UPDATE ME ====== |
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if arm-none-eabi-gcc -Werror=stringop-overflow=1 -mcpu=cortex-m3 -mthumb -O2 -g -Wall -Werror -c curtest.c 2>&1 | grep 'accessing 160 bytes in a region of size 32' > /dev/null; then |
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echo dropping line $(($i + 1 + $droppedlines)) |
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droppedlines=$(($droppedlines + 1)) |
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mv curtest.c test.c |
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break |
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fi |
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i=$(($i + 1)) |
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echo keeping line $(($i + $droppedlines)) |
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done |
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done |
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echo dropped $droppedlines lines |
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totdroppedlines=$(($totdroppedlines + $droppedlines)) |
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done |
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echo dropped $totdroppedlines lines in total |
