From d2e6f9272d337d1b23b588e7ead8500d40cbf4e9 Mon Sep 17 00:00:00 2001 From: Alexander Bulekov Date: Sat, 4 Feb 2023 23:29:50 -0500 Subject: fuzz: remove fork-fuzzing scaffolding Fork-fuzzing provides a few pros, but our implementation prevents us from using fuzzers other than libFuzzer, and may be causing issues such as coverage-failure builds on OSS-Fuzz. It is not a great long-term solution as it depends on internal implementation details of libFuzzer (which is no longer in active development). Remove it in favor of other methods of resetting state between inputs. Signed-off-by: Alexander Bulekov Reviewed-by: Darren Kenny --- tests/qtest/fuzz/fork_fuzz.c | 41 ----------------------------------------- 1 file changed, 41 deletions(-) delete mode 100644 tests/qtest/fuzz/fork_fuzz.c (limited to 'tests/qtest/fuzz/fork_fuzz.c') diff --git a/tests/qtest/fuzz/fork_fuzz.c b/tests/qtest/fuzz/fork_fuzz.c deleted file mode 100644 index 6ffb2a7937..0000000000 --- a/tests/qtest/fuzz/fork_fuzz.c +++ /dev/null @@ -1,41 +0,0 @@ -/* - * Fork-based fuzzing helpers - * - * Copyright Red Hat Inc., 2019 - * - * Authors: - * Alexander Bulekov - * - * This work is licensed under the terms of the GNU GPL, version 2 or later. - * See the COPYING file in the top-level directory. - * - */ - -#include "qemu/osdep.h" -#include "fork_fuzz.h" - - -void counter_shm_init(void) -{ - /* Copy what's in the counter region to a temporary buffer.. */ - void *copy = malloc(&__FUZZ_COUNTERS_END - &__FUZZ_COUNTERS_START); - memcpy(copy, - &__FUZZ_COUNTERS_START, - &__FUZZ_COUNTERS_END - &__FUZZ_COUNTERS_START); - - /* Map a shared region over the counter region */ - if (mmap(&__FUZZ_COUNTERS_START, - &__FUZZ_COUNTERS_END - &__FUZZ_COUNTERS_START, - PROT_READ | PROT_WRITE, MAP_SHARED | MAP_FIXED | MAP_ANONYMOUS, - 0, 0) == MAP_FAILED) { - perror("Error: "); - exit(1); - } - - /* Copy the original data back to the counter-region */ - memcpy(&__FUZZ_COUNTERS_START, copy, - &__FUZZ_COUNTERS_END - &__FUZZ_COUNTERS_START); - free(copy); -} - - -- cgit 1.4.1