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fuzz-json: optionally allow logging and output

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Similarly to other fuzzers… this makes development easier.
This commit is contained in:
Zbigniew Jędrzejewski-Szmek 2022-05-09 10:41:36 +02:00
parent 9674b089cf
commit 9ad955ce40
1 changed files with 14 additions and 5 deletions
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19
src/fuzz/fuzz-json.c
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@ -1,6 +1,7 @@
/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include "alloc-util.h"
#include "env-util.h"
#include "fd-util.h"
#include "fuzz.h"
#include "json.h"
@ -10,18 +11,26 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
size_t out_size;
_cleanup_fclose_ FILE *f = NULL, *g = NULL;
_cleanup_(json_variant_unrefp) JsonVariant *v = NULL;
int r;
/* Disable most logging if not running standalone */
if (!getenv("SYSTEMD_LOG_LEVEL"))
log_set_max_level(LOG_CRIT);
f = data_to_file(data, size);
assert_se(f);
if (json_parse_file(f, NULL, 0, &v, NULL, NULL) < 0)
r = json_parse_file(f, NULL, 0, &v, NULL, NULL);
if (r < 0) {
log_debug_errno(r, "failed to parse input: %m");
return 0;
}
g = open_memstream_unlocked(&out, &out_size);
assert_se(g);
if (getenv_bool("SYSTEMD_FUZZ_OUTPUT") <= 0)
assert_se(g = open_memstream_unlocked(&out, &out_size));
json_variant_dump(v, 0, g, NULL);
json_variant_dump(v, JSON_FORMAT_PRETTY|JSON_FORMAT_COLOR|JSON_FORMAT_SOURCE, g, NULL);
json_variant_dump(v, 0, g ?: stdout, NULL);
json_variant_dump(v, JSON_FORMAT_PRETTY|JSON_FORMAT_COLOR|JSON_FORMAT_SOURCE, g ?: stdout, NULL);
return 0;
}