[PULL 23/31] fuzz: register predefined generic-fuzz configs

[Thomas Huth]

From: Alexander Bulekov <alxndr@bu.edu>

We call get_generic_fuzz_configs, which fills an array with
predefined {name, args, objects} triples. For each of these, we add a
new FuzzTarget, that uses a small wrapper to set
QEMU_FUZZ_{ARGS,OBJECTS} to the corresponding predefined values.

Reviewed-by: Darren Kenny <darren.kenny@oracle.com>
Signed-off-by: Alexander Bulekov <alxndr@bu.edu>
Message-Id: <20201023150746.107063-16-alxndr@bu.edu>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
 tests/qtest/fuzz/generic_fuzz.c | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/tests/qtest/fuzz/generic_fuzz.c b/tests/qtest/fuzz/generic_fuzz.c
index 592b78ffe2..a8f5864883 100644
--- a/tests/qtest/fuzz/generic_fuzz.c
+++ b/tests/qtest/fuzz/generic_fuzz.c
@@ -26,6 +26,7 @@
 #include "hw/qdev-core.h"
 #include "hw/pci/pci.h"
 #include "hw/boards.h"
+#include "generic_fuzz_configs.h"
 
 /*
  * SEPARATOR is used to separate "operations" in the fuzz input
@@ -907,6 +908,17 @@ static GString *generic_fuzz_cmdline(FuzzTarget *t)
     return cmd_line;
 }
 
+static GString *generic_fuzz_predefined_config_cmdline(FuzzTarget *t)
+{
+    const generic_fuzz_config *config;
+    g_assert(t->opaque);
+
+    config = t->opaque;
+    setenv("QEMU_FUZZ_ARGS", config->args, 1);
+    setenv("QEMU_FUZZ_OBJECTS", config->objects, 1);
+    return generic_fuzz_cmdline(t);
+}
+
 static void register_generic_fuzz_targets(void)
 {
     fuzz_add_target(&(FuzzTarget){
@@ -917,6 +929,26 @@ static void register_generic_fuzz_targets(void)
             .fuzz = generic_fuzz,
             .crossover = generic_fuzz_crossover
     });
+
+    GString *name;
+    const generic_fuzz_config *config;
+
+    for (int i = 0;
+         i < sizeof(predefined_configs) / sizeof(generic_fuzz_config);
+         i++) {
+        config = predefined_configs + i;
+        name = g_string_new("generic-fuzz");
+        g_string_append_printf(name, "-%s", config->name);
+        fuzz_add_target(&(FuzzTarget){
+                .name = name->str,
+                .description = "Predefined generic-fuzz config.",
+                .get_init_cmdline = generic_fuzz_predefined_config_cmdline,
+                .pre_fuzz = generic_pre_fuzz,
+                .fuzz = generic_fuzz,
+                .crossover = generic_fuzz_crossover,
+                .opaque = (void *)config
+        });
+    }
 }
 
 fuzz_target_init(register_generic_fuzz_targets);
-- 
2.18.2