pidgin/pidgin

Add fuzzing support for some libpurple features
release-2.x.y
2021-06-24, Jordy Zomer <>
97c51d97d375
Add fuzzing support for some libpurple features

Testing Done:
Hi!

I built and tested all of these fuzzers for libpurple.

You can build them by first building pidgin/libpurple with `--enable-fuzzing` then going into `libpurple/tests` and run `make check`. After that you can run these fuzzers. With a dictionary if you want :)

for example:
```bash
$ ./fuzz_markup_strip_html -dict=dictionaries/html.dict
Dictionary: 465 entries
INFO: Seed: 2274862685
INFO: Loaded 1 modules (3 inline 8-bit counters): 3 [0x5a4ec0, 0x5a4ec3),
INFO: Loaded 1 PC tables (3 PCs): 3 [0x568ee8,0x568f18),
INFO: -max_len is not provided; libFuzzer will not generate inputs larger than 4096 bytes
INFO: A corpus is not provided, starting from an empty corpus
#2 INITED cov: 2 ft: 2 corp: 1/1b exec/s: 0 rss: 30Mb
#1048576 pulse cov: 2 ft: 2 corp: 1/1b lim: 4096 exec/s: 524288 rss: 789Mb
#2097152 pulse cov: 2 ft: 2 corp: 1/1b lim: 4096 exec/s: 524288 rss: 792Mb
```

Best Regards,

Jordy Zomer

Reviewed at https://reviews.imfreedom.org/r/760/
# This program takes a C source as the input and produces the list of
# all signals registered.
#
# Output is:
# <signal name="Changed">
# <arg name="new_value" type="b"/>
# </signal>
from __future__ import absolute_import, division, print_function
import re
import sys
# List "excluded" contains signals that shouldn't be exported via
# DBus. If you remove a signal from this list, please make sure
# that it does not break "make" with the configure option
# "--enable-dbus" turned on.
excluded = [\
# purple_dbus_signal_emit_purple prevents our "dbus-method-called"
# signal from being propagated to dbus.
"dbus-method-called",
]
registerregex = re.compile("purple_signal_register[^;]+\"([\w\-]+)\"[^;]+(purple_marshal_\w+)[^;]+;")
nameregex = re.compile('[-_][a-z]')
print("/* Generated by %s. Do not edit! */" % sys.argv[0])
print("const char *dbus_signals = ")
for match in registerregex.finditer(sys.stdin.read()):
signal = match.group(1)
marshal = match.group(2)
if signal in excluded:
continue
signal = nameregex.sub(lambda x:x.group()[1].upper(), '-'+signal)
print("\" <signal name='%s'>\\n\"" % signal)
args = marshal.split('_')
# ['purple', 'marshal', <return type>, '', args...]
if len(args) > 4:
for arg in args[4:]:
if arg == "POINTER":
type = 'p'
elif arg == "ENUM":
type = 'i'
elif arg == "INT":
type = 'i'
elif arg == "UINT":
type = 'u'
elif arg == "INT64":
type = 'x'
elif arg == "UINT64":
type = 't'
elif arg == "BOOLEAN":
type = 'b'
print("\" <arg type='%s'/>\\n\"" % type)
print("\" </signal>\\n\"")
print(";")