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fuzz: select fuzz target using executable name

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The fuzzers are built into a binary (e.g. qemu-fuzz-i386). To select the
device to fuzz/fuzz target, we usually use the --fuzz-target= argument.
This commit allows the fuzz-target to be specified using the name of the
executable. If the executable name ends with -target-FUZZ_TARGET, then
we select the fuzz target based on this name, rather than the
--fuzz-target argument. This is useful for systems such as oss-fuzz
where we don't have control of the arguments passed to the fuzzer.

[Fixed incorrect indentation.
--Stefan]

Signed-off-by: Alexander Bulekov <alxndr@bu.edu>
Reviewed-by: Darren Kenny <darren.kenny@oracle.com>
Message-id: 20200421182230.6313-1-alxndr@bu.edu
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Alexander Bulekov 2020-04-21 14:22:30 -04:00 committed by Stefan Hajnoczi
parent 9af638cc1f
commit 05509c8e6d
1 changed files with 11 additions and 8 deletions
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19
tests/qtest/fuzz/fuzz.c
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@ -91,6 +91,7 @@ static void usage(char *path)
printf(" * %s : %s\n", tmp->target->name,
tmp->target->description);
}
printf("Alternatively, add -target-FUZZ_TARGET to the executable name\n");
exit(0);
}
@ -143,18 +144,20 @@ int LLVMFuzzerInitialize(int *argc, char ***argv, char ***envp)
module_call_init(MODULE_INIT_QOM);
module_call_init(MODULE_INIT_LIBQOS);
if (*argc <= 1) {
target_name = strstr(**argv, "-target-");
if (target_name) { /* The binary name specifies the target */
target_name += strlen("-target-");
} else if (*argc > 1) { /* The target is specified as an argument */
target_name = (*argv)[1];
if (!strstr(target_name, "--fuzz-target=")) {
usage(**argv);
}
target_name += strlen("--fuzz-target=");
} else {
usage(**argv);
}
/* Identify the fuzz target */
target_name = (*argv)[1];
if (!strstr(target_name, "--fuzz-target=")) {
usage(**argv);
}
target_name += strlen("--fuzz-target=");
fuzz_target = fuzz_get_target(target_name);
if (!fuzz_target) {
usage(**argv);