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envelope-from=alxndr@bu.edu; helo=NAM12-DM6-obe.outbound.protection.outlook.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/20 22:25:42 X-ACL-Warn: Detected OS = Windows NT kernel [generic] [fuzzy] X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, HK_RANDOM_ENVFROM=0.001, HK_RANDOM_FROM=0.001, MSGID_FROM_MTA_HEADER=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Thomas Huth , Alexander Bulekov , darren.kenny@oracle.com, bsd@redhat.com, stefanha@redhat.com, Paolo Bonzini , philmd@redhat.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" This parses a yaml file containing general-fuzzer configs and builds a separate oss-fuzz wrapper binary for each one, changing some preprocessor macros for each configuration. To avoid dealing with escaping and stringifying, convert each string into a byte-array representation Signed-off-by: Alexander Bulekov --- scripts/oss-fuzz/build_general_fuzzers.py | 69 +++++++++++++++++++++++ 1 file changed, 69 insertions(+) create mode 100755 scripts/oss-fuzz/build_general_fuzzers.py diff --git a/scripts/oss-fuzz/build_general_fuzzers.py b/scripts/oss-fuzz/build_general_fuzzers.py new file mode 100755 index 0000000000..918f1143a5 --- /dev/null +++ b/scripts/oss-fuzz/build_general_fuzzers.py @@ -0,0 +1,69 @@ +#!/usr/bin/env python3 +# -*- coding: utf-8 -*- + +""" +This script creates wrapper binaries that invoke the general-device-fuzzer with +configurations specified in a yaml config file. +""" +import sys +import os +import yaml +import tempfile + +CC = "" +TEMPLATE_FILENAME = "target_template.c" +TEMPLATE_PATH = "" + + +def usage(): + print("Usage: CC=COMPILER {} CONFIG_PATH \ +OUTPUT_PATH_PREFIX".format(sys.argv[0])) + sys.exit(0) + + +def str_to_c_byte_array(s): + """ + Convert strings to byte-arrays so we don't worry about formatting + strings to play nicely with cc -DQEMU_FUZZARGS etc + """ + return ','.join('0x{:02x}'.format(ord(x)) for x in s) + + +def compile_wrapper(cfg, path): + os.system('$CC -DQEMU_FUZZ_ARGS="{fuzz_args}" \ + -DQEMU_FUZZ_OBJECTS="{fuzz_objs}" \ + {wrapper_template} -o {output_bin}'.format( + fuzz_args=str_to_c_byte_array(cfg["args"].replace("\n", " ")), + fuzz_objs=str_to_c_byte_array(cfg["objects"].replace("\n", " ")), + wrapper_template=TEMPLATE_PATH, + output_bin=path)) + + +def main(): + global CC + global TEMPLATE_PATH + global OUTPUT_BIN_NAME + + if len(sys.argv) != 3: + usage() + + cfg_path = sys.argv[1] + out_path = sys.argv[2] + + CC = os.getenv("CC", default="cc") + TEMPLATE_PATH = os.path.join(os.path.dirname(__file__), TEMPLATE_FILENAME) + if not os.path.exists(TEMPLATE_PATH): + print("Error {} doesn't exist".format(TEMPLATE_PATH)) + sys.exit(1) + + with open(cfg_path, "r") as f: + configs = yaml.load(f)["configs"] + for cfg in configs: + assert "name" in cfg + assert "args" in cfg + assert "objects" in cfg + compile_wrapper(cfg, out_path + cfg["name"]) + + +if __name__ == '__main__': + main()