tests: support QTEST_TRACE env variable
When debugging failing qtests it is useful to be able to turn on trace output to stderr. The QTEST_TRACE env variable contents get injected as a '-trace <str>' command line arg Reviewed-by: Peter Xu <peterx@redhat.com> Reviewed-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com> Message-Id: <20220310171821.3724080-4-berrange@redhat.com> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
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@ -259,6 +259,9 @@ QTestState *qtest_init_without_qmp_handshake(const char *extra_args)
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gchar *qmp_socket_path;
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gchar *qmp_socket_path;
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gchar *command;
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gchar *command;
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const char *qemu_binary = qtest_qemu_binary();
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const char *qemu_binary = qtest_qemu_binary();
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const char *trace = g_getenv("QTEST_TRACE");
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g_autofree char *tracearg = trace ?
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g_strdup_printf("-trace %s ", trace) : g_strdup("");
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s = g_new(QTestState, 1);
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s = g_new(QTestState, 1);
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@ -281,14 +284,15 @@ QTestState *qtest_init_without_qmp_handshake(const char *extra_args)
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qtest_add_abrt_handler(kill_qemu_hook_func, s);
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qtest_add_abrt_handler(kill_qemu_hook_func, s);
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command = g_strdup_printf("exec %s "
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command = g_strdup_printf("exec %s %s"
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"-qtest unix:%s "
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"-qtest unix:%s "
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"-qtest-log %s "
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"-qtest-log %s "
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"-chardev socket,path=%s,id=char0 "
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"-chardev socket,path=%s,id=char0 "
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"-mon chardev=char0,mode=control "
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"-mon chardev=char0,mode=control "
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"-display none "
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"-display none "
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"%s"
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"%s"
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" -accel qtest", qemu_binary, socket_path,
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" -accel qtest",
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qemu_binary, tracearg, socket_path,
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getenv("QTEST_LOG") ? "/dev/fd/2" : "/dev/null",
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getenv("QTEST_LOG") ? "/dev/fd/2" : "/dev/null",
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qmp_socket_path,
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qmp_socket_path,
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extra_args ?: "");
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extra_args ?: "");
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