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From: Alexander Bulekov <alxndr@bu.edu>
To: qemu-devel@nongnu.org
Cc: Laurent Vivier <lvivier@redhat.com>,
	Peter Maydell <peter.maydell@linaro.org>,
	Thomas Huth <thuth@redhat.com>, Alexander Bulekov <alxndr@bu.edu>,
	Bandan Das <bsd@redhat.com>,
	Stefan Hajnoczi <stefanha@redhat.com>,
	Paolo Bonzini <pbonzini@redhat.com>
Subject: [PULL 4/7] fuzz: log the arguments used to initialize QEMU
Date: Wed, 20 Jan 2021 12:35:30 -0500
Message-ID: <20210120173536.265601-9-alxndr@bu.edu> (raw)
In-Reply-To: <20210120173536.265601-1-alxndr@bu.edu>

This is useful for building reproducers. Instead checking the code or
the QEMU_FUZZ_ARGS, the arguments are at the top of the crash log.

Signed-off-by: Alexander Bulekov <alxndr@bu.edu>
Reviewed-by: Thomas Huth <thuth@redhat.com>
---
 tests/qtest/fuzz/fuzz.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/tests/qtest/fuzz/fuzz.c b/tests/qtest/fuzz/fuzz.c
index 238866a037..496d11a231 100644
--- a/tests/qtest/fuzz/fuzz.c
+++ b/tests/qtest/fuzz/fuzz.c
@@ -159,6 +159,8 @@ int LLVMFuzzerInitialize(int *argc, char ***argv, char ***envp)
     char *target_name;
     const char *bindir;
     char *datadir;
+    GString *cmd_line;
+    gchar *pretty_cmd_line;
     bool serialize = false;
 
     /* Initialize qgraph and modules */
@@ -217,7 +219,7 @@ int LLVMFuzzerInitialize(int *argc, char ***argv, char ***envp)
     }
 
     /* Run QEMU's softmmu main with the fuzz-target dependent arguments */
-    GString *cmd_line = fuzz_target->get_init_cmdline(fuzz_target);
+    cmd_line = fuzz_target->get_init_cmdline(fuzz_target);
     g_string_append_printf(cmd_line, " %s -qtest /dev/null ",
                            getenv("QTEST_LOG") ? "" : "-qtest-log none");
 
@@ -226,6 +228,13 @@ int LLVMFuzzerInitialize(int *argc, char ***argv, char ***envp)
     wordexp(cmd_line->str, &result, 0);
     g_string_free(cmd_line, true);
 
+    if (getenv("QTEST_LOG")) {
+        pretty_cmd_line  = g_strjoinv(" ", result.we_wordv + 1);
+        printf("Starting %s with Arguments: %s\n",
+                result.we_wordv[0], pretty_cmd_line);
+        g_free(pretty_cmd_line);
+    }
+
     qemu_init(result.we_wordc, result.we_wordv, NULL);
 
     /* re-enable the rcu atfork, which was previously disabled in qemu_init */
-- 
2.28.0



  parent reply index

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-20 17:35 [PULL 0/7] 2021-01-20 fuzzing patches Alexander Bulekov
2021-01-20 17:35 ` [PULL 1/7] docs/fuzz: fix pre-meson path Alexander Bulekov
2021-01-20 17:35 ` [PULL 1/7] fuzz: ignore address_space_map is_write flag Alexander Bulekov
2021-01-20 17:35 ` [PULL 2/7] fuzz: log the arguments used to initialize QEMU Alexander Bulekov
2021-01-20 17:35 ` [PULL 2/7] fuzz: refine the ide/ahci fuzzer configs Alexander Bulekov
2021-01-20 17:35 ` [PULL 3/7] docs/fuzz: fix pre-meson path Alexander Bulekov
2021-01-20 17:35 ` [PULL 3/7] fuzz: enable dynamic args for generic-fuzz configs Alexander Bulekov
2021-01-20 17:35 ` [PULL 4/7] docs/fuzz: add some information about OSS-Fuzz Alexander Bulekov
2021-01-20 17:35 ` Alexander Bulekov [this message]
2021-01-20 17:35 ` [PULL 5/7] fuzz: add virtio-9p configurations for fuzzing Alexander Bulekov
2021-01-20 17:35 ` [PULL 5/7] fuzz: enable dynamic args for generic-fuzz configs Alexander Bulekov
2021-01-20 17:35 ` [PULL 6/7] docs/fuzz: add some information about OSS-Fuzz Alexander Bulekov
2021-01-20 17:35 ` [PULL 6/7] fuzz: ignore address_space_map is_write flag Alexander Bulekov
2021-01-20 17:35 ` [PULL 7/7] fuzz: add virtio-9p configurations for fuzzing Alexander Bulekov
2021-01-20 17:35 ` [PULL 7/7] fuzz: refine the ide/ahci fuzzer configs Alexander Bulekov
2021-01-20 17:41 ` [PULL 0/7] 2021-01-20 fuzzing patches Alexander Bulekov
2021-01-20 17:44 Alexander Bulekov
2021-01-20 17:44 ` [PULL 4/7] fuzz: log the arguments used to initialize QEMU Alexander Bulekov

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