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Date: Thu, 19 Dec 2019 10:49:25 +0000 Message-Id: <20191219104934.866-17-alex.bennee@linaro.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191219104934.866-1-alex.bennee@linaro.org> References: <20191219104934.866-1-alex.bennee@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2a00:1450:4864:20::32e X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: =?UTF-8?q?Alex=20Benn=C3=A9e?= , qemu-devel@nongnu.org, Robert Foley Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Robert Foley One test ensures that the logfile handle is still valid even if the logfile is changed during logging. The other test validates that the logfile handle remains valid under the logfile lock even if the logfile is closed. Signed-off-by: Robert Foley Reviewed-by: Alex Bennée Signed-off-by: Alex Bennée Message-Id: <20191118211528.3221-7-robert.foley@linaro.org> diff --git a/tests/test-logging.c b/tests/test-logging.c index a12585f70af..1e646f045dc 100644 --- a/tests/test-logging.c +++ b/tests/test-logging.c @@ -108,6 +108,82 @@ static void test_parse_path(gconstpointer data) error_free_or_abort(&err); } +static void test_logfile_write(gconstpointer data) +{ + QemuLogFile *logfile; + QemuLogFile *logfile2; + gchar const *dir = data; + Error *err = NULL; + g_autofree gchar *file_path; + g_autofree gchar *file_path1; + FILE *orig_fd; + + /* + * Before starting test, set log flags, to ensure the file gets + * opened below with the call to qemu_set_log_filename(). + * In cases where a logging backend other than log is used, + * this is needed. + */ + qemu_set_log(CPU_LOG_TB_OUT_ASM); + file_path = g_build_filename(dir, "qemu_test_log_write0.log", NULL); + file_path1 = g_build_filename(dir, "qemu_test_log_write1.log", NULL); + + /* + * Test that even if an open file handle is changed, + * our handle remains valid due to RCU. + */ + qemu_set_log_filename(file_path, &err); + g_assert(!err); + rcu_read_lock(); + logfile = atomic_rcu_read(&qemu_logfile); + orig_fd = logfile->fd; + g_assert(logfile && logfile->fd); + fprintf(logfile->fd, "%s 1st write to file\n", __func__); + fflush(logfile->fd); + + /* Change the logfile and ensure that the handle is still valid. */ + qemu_set_log_filename(file_path1, &err); + g_assert(!err); + logfile2 = atomic_rcu_read(&qemu_logfile); + g_assert(logfile->fd == orig_fd); + g_assert(logfile2->fd != logfile->fd); + fprintf(logfile->fd, "%s 2nd write to file\n", __func__); + fflush(logfile->fd); + rcu_read_unlock(); +} + +static void test_logfile_lock(gconstpointer data) +{ + FILE *logfile; + gchar const *dir = data; + Error *err = NULL; + g_autofree gchar *file_path; + + file_path = g_build_filename(dir, "qemu_test_logfile_lock0.log", NULL); + + /* + * Test the use of the logfile lock, such + * that even if an open file handle is closed, + * our handle remains valid for use due to RCU. + */ + qemu_set_log_filename(file_path, &err); + logfile = qemu_log_lock(); + g_assert(logfile); + fprintf(logfile, "%s 1st write to file\n", __func__); + fflush(logfile); + + /* + * Initiate a close file and make sure our handle remains + * valid since we still have the logfile lock. + */ + qemu_log_close(); + fprintf(logfile, "%s 2nd write to file\n", __func__); + fflush(logfile); + qemu_log_unlock(logfile); + + g_assert(!err); +} + /* Remove a directory and all its entries (non-recursive). */ static void rmdir_full(gchar const *root) { @@ -134,6 +210,10 @@ int main(int argc, char **argv) g_test_add_func("/logging/parse_range", test_parse_range); g_test_add_data_func("/logging/parse_path", tmp_path, test_parse_path); + g_test_add_data_func("/logging/logfile_write_path", + tmp_path, test_logfile_write); + g_test_add_data_func("/logging/logfile_lock_path", + tmp_path, test_logfile_lock); rc = g_test_run(); -- 2.20.1