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tests: support QTEST_TRACE env variable

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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>
This commit is contained in:
Daniel P. Berrangé 2022-03-10 17:18:06 +00:00 committed by Dr. David Alan Gilbert
parent a17ec44dba
commit dcd23e9cae
1 changed files with 6 additions and 2 deletions
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8
tests/qtest/libqtest.c
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@ -259,6 +259,9 @@ QTestState *qtest_init_without_qmp_handshake(const char *extra_args)
gchar *qmp_socket_path;
gchar *command;
const char *qemu_binary = qtest_qemu_binary();
const char *trace = g_getenv("QTEST_TRACE");
g_autofree char *tracearg = trace ?
g_strdup_printf("-trace %s ", trace) : g_strdup("");
s = g_new(QTestState, 1);
@ -281,14 +284,15 @@ QTestState *qtest_init_without_qmp_handshake(const char *extra_args)
qtest_add_abrt_handler(kill_qemu_hook_func, s);
command = g_strdup_printf("exec %s "
command = g_strdup_printf("exec %s %s"
"-qtest unix:%s "
"-qtest-log %s "
"-chardev socket,path=%s,id=char0 "
"-mon chardev=char0,mode=control "
"-display none "
"%s"
" -accel qtest", qemu_binary, socket_path,
" -accel qtest",
qemu_binary, tracearg, socket_path,
getenv("QTEST_LOG") ? "/dev/fd/2" : "/dev/null",
qmp_socket_path,
extra_args ?: "");