add script to minimize corpus

docs/fuzzing.rst

@@ -75,3 +75,10 @@ large fuzz targets. Call `b2` like this::
 
 	b2 clang stage-large -j$(nproc)
 
+sharing corpora
+---------------
+
+Before sharing your fuzz corpus, it should be minimized. There is a script
+called `minimize.sh` which moves `corpus` to `prev-corpus` and copies over
+a minimized set of inputs to a new `corpus` directory.
+

docs/hunspell/libtorrent.dic

@@ -468,3 +468,4 @@ fuzzers
 fuzzer
 libFuzzer
 clang's
+prev

fuzzers/Jamfile

@@ -76,6 +76,7 @@ local LARGE_TARGETS =
 	resume_data
 	file_storage_add_file
 	sanitize_path
+	upnp
 	;
 
 install stage : $(TARGETS) : <install-type>EXE <location>fuzzers ;

fuzzers/minimize.sh

@@ -0,0 +1,17 @@
+#!/bin/bash
+
+function minimize
+{
+mkdir corpus/${1}
+./fuzzers/${1} -artifact_prefix=./${1}- -merge=1 corpus/${1} prev-corpus/${1}
+}
+
+mv corpus prev-corpus
+mkdir corpus
+
+for file in fuzzers/*; do
+	minimize $(basename $file) &
+done
+
+wait
+

fuzzers/run.sh

@@ -1,3 +1,4 @@
+#!/bin/bash
 
 function run
 {
@@ -5,29 +6,8 @@ function run
 ./fuzzers/${1} -max_total_time=172800 -timeout=10 -artifact_prefix=./${1}- corpus/${1}
 }
 
-run torrent_info &
+for file in fuzzers/*; do
-run parse_magnet_uri &
+	run $(basename $file) &
-run bdecode_node &
+done
-run lazy_bdecode &
-run parse_int &
-run sanitize_path &
-run escape_path &
-run file_storage_add_file &
-run base32decode &
-run base32encode &
-run base64encode &
-run escape_string e&
-run gzip &
-run verify_encoding &
-run convert_to_native &
-run convert_from_native &
-run utf8_wchar &
-run wchar_utf8 &
-run utf8_codepoint &
-run http_parser &
-run upnp &
-run dht_node &
-run utp &
-run resume_data &
 
 wait