fuzz: new fuzzer for dirstate parser
Differential Revision: https://phab.mercurial-scm.org/D5463
--- a/contrib/fuzz/Makefile Wed Dec 19 20:26:53 2018 -0500
+++ b/contrib/fuzz/Makefile Wed Dec 19 23:48:35 2018 -0500
@@ -135,12 +135,23 @@
revlog_corpus.zip:
python revlog_corpus.py $$OUT/revlog_fuzzer_seed_corpus.zip
+dirstate_fuzzer: sanpy dirstate.cc manifest.o charencode.o parsers.o dirs.o pathencode.o revlog.o pyutil.o
+ $(CXX) $(CXXFLAGS) `$$OUT/sanpy/bin/python-config --cflags` \
+ -Wno-register -Wno-macro-redefined \
+ -I../../mercurial dirstate.cc \
+ manifest.o charencode.o parsers.o dirs.o pathencode.o revlog.o pyutil.o \
+ -lFuzzingEngine `$$OUT/sanpy/bin/python-config --ldflags` \
+ -o $$OUT/dirstate_fuzzer
+
+dirstate_corpus.zip:
+ python dirstate_corpus.py $$OUT/dirstate_fuzzer_seed_corpus.zip
+
clean:
$(RM) *.o *_fuzzer \
bdiff \
mpatch \
xdiff
-oss-fuzz: bdiff_fuzzer mpatch_fuzzer mpatch_corpus.zip xdiff_fuzzer manifest_fuzzer manifest_corpus.zip revlog_fuzzer revlog_corpus.zip
+oss-fuzz: bdiff_fuzzer mpatch_fuzzer mpatch_corpus.zip xdiff_fuzzer manifest_fuzzer manifest_corpus.zip revlog_fuzzer revlog_corpus.zip dirstate_fuzzer dirstate_corpus.zip
.PHONY: all clean oss-fuzz sanpy
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/contrib/fuzz/dirstate.cc Wed Dec 19 23:48:35 2018 -0500
@@ -0,0 +1,48 @@
+#include <Python.h>
+#include <assert.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include <string>
+
+#include "pyutil.h"
+
+extern "C" {
+
+static PyCodeObject *code;
+
+extern "C" int LLVMFuzzerInitialize(int *argc, char ***argv)
+{
+ contrib::initpy(*argv[0]);
+ code = (PyCodeObject *)Py_CompileString(R"py(
+from parsers import parse_dirstate
+try:
+ dmap = {}
+ copymap = {}
+ p = parse_dirstate(dmap, copymap, data)
+except Exception as e:
+ pass
+ # uncomment this print if you're editing this Python code
+ # to debug failures.
+ # print e
+)py",
+ "fuzzer", Py_file_input);
+ return 0;
+}
+
+int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size)
+{
+ PyObject *text =
+ PyBytes_FromStringAndSize((const char *)Data, (Py_ssize_t)Size);
+ PyObject *locals = PyDict_New();
+ PyDict_SetItemString(locals, "data", text);
+ PyObject *res = PyEval_EvalCode(code, contrib::pyglobals(), locals);
+ if (!res) {
+ PyErr_Print();
+ }
+ Py_XDECREF(res);
+ Py_DECREF(locals);
+ Py_DECREF(text);
+ return 0; // Non-zero return values are reserved for future use.
+}
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/contrib/fuzz/dirstate_corpus.py Wed Dec 19 23:48:35 2018 -0500
@@ -0,0 +1,18 @@
+from __future__ import absolute_import, print_function
+
+import argparse
+import os
+import zipfile
+
+ap = argparse.ArgumentParser()
+ap.add_argument("out", metavar="some.zip", type=str, nargs=1)
+args = ap.parse_args()
+
+reporoot = os.path.normpath(os.path.join(os.path.dirname(__file__),
+ '..', '..'))
+dirstate = os.path.join(reporoot, '.hg', 'dirstate')
+
+with zipfile.ZipFile(args.out[0], "w", zipfile.ZIP_STORED) as zf:
+ if os.path.exists(dirstate):
+ with open(dirstate) as f:
+ zf.writestr("dirstate", f.read())