#!/bin/sh
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# Copyright 2017 Google Inc.
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#
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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if [ -z "$1" ]; then
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cat <<-EOM
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Usage:
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$0 [afl-out-loc]
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Run something like this:
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$0 ~/afl-out
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where afl-out is the directory containing all the output of the afl-fuzzers.
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You can typically ssh into skia-fuzzer-be-1 and skia-fuzzer-be-2 and run
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tar -czf afl-out.tar.gz /mnt/ssd0/fuzzes/afl-out/*/fuzzer0/queue
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and extract it locally to get the directories needed to assess coverage.
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EOM
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exit 1
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fi
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set -x
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set -e
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cd "$(dirname "$0")/.."
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EXECUTABLE="fuzz"
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DIR="$(mktemp -d "${TMPDIR:-/tmp}/skia_coverage_XXXXXXXXXX")"
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BUILD=out/coverage
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# Build $EXECUTABLE
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bin/sync
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bin/fetch-gn
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rm -rf $BUILD
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#TODO: make this work with Clang.
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ARGS='cc="gcc" cxx="g++" extra_cflags=["--coverage"] extra_ldflags=["--coverage"]'
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gn gen --args="$ARGS" "$BUILD"
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ninja -C "$BUILD" "$EXECUTABLE"
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GCOV="$(realpath tools/gcov_shim)"
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# Generate a zero-baseline so files not covered by $EXECUTABLE $@ will
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# still show up in the report. This reads the .gcno files that are
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# created at compile time.
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lcov -q --gcov-tool="$GCOV" -c -b "$BUILD" -d "$BUILD" -o "$DIR"/baseline -i
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# Running the binary generates the real coverage information, the .gcda files.
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QUEUES=("$1/api_parse_path/fuzzer0/queue/*" "$1/color_deserialize/fuzzer0/queue/*" "$1/skcodec_scale/fuzzer0/queue/*" "$1/skcodec_mode/fuzzer0/queue/*" "$1/api_draw_functions/fuzzer0/queue/*" "$1/api_gradient/fuzzer0/queue/*" "$1/api_image_filter/fuzzer0/queue/*" "$1/api_pathop/fuzzer0/queue/*" "$1/sksl2glsl/fuzzer0/queue/*" "$1/null_canvas/fuzzer0/queue/*" "$1/pdf_canvas/fuzzer0/queue/*" "$1/n32_canvas/fuzzer0/queue/*")
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ARGS=("-n ParsePath" "-t color_deserialize" "-t image_scale" "-t image_mode" "-n DrawFunctions" "-n Gradients" "-n SerializedImageFilter" "-n Pathop" "-t sksl2glsl" "-n NullCanvas" "-n PDFCanvas" "-n RasterN32Canvas")
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# We can't simply pass the directories to the fuzzers because some of the fuzzes will
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# crash or assert, which would kill the call to fuzz prematurely. Instead we run them
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# individually using the loops below.
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for i in `seq ${#QUEUES[@]}`
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do
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FILES=${QUEUES[i]}
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for f in $FILES
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do
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# Executing the fuzzes sequentially would take a very long time. So, we run them
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# in the background, making sure we don't go crazy and execute them too fast or
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# that they execute for a long time.
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timeout 10 $BUILD/$EXECUTABLE ${ARGS[i]} -b $f &
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sleep .005s
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done
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done
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sleep 10s
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echo "done running the fuzzes -- generating report"
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lcov -q --gcov-tool="$GCOV" -c -b "$BUILD" -d "$BUILD" -o "$DIR"/coverage
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lcov -q -a "$DIR"/baseline -a "$DIR"/coverage -o "$DIR"/merged
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genhtml -q "$DIR"/merged --legend -o "$DIR"/coverage_report --ignore-errors source
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xdg-open "$DIR"/coverage_report/index.html
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