Add test support

CMakeLists.txt

@@ -38,6 +38,14 @@ else()
   message(WARNING "IPO is not supported, expect performance penalty\n${error}")
 endif()
 
+if(CMAKE_PROJECT_NAME STREQUAL PROJECT_NAME)
+  include(CTest)
+
+  if(BUILD_TESTING)
+    add_subdirectory(test)
+  endif()
+endif()
+
 add_library(ovni SHARED
   ovni.c
   parson.c

test/CMakeLists.txt

@@ -0,0 +1,20 @@
+#
+# Copyright (c) 2021 Barcelona Supercomputing Center (BSC)
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+add_executable(flush flush.c)
+target_link_libraries(flush ovni)
+
+add_test(NAME flush COMMAND ./driver.sh flush)

test/driver.sh

@@ -0,0 +1,32 @@
+#!/bin/sh
+#
+# Copyright (c) 2021 Barcelona Supercomputing Center (BSC)
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+set -e
+
+testname="$1"
+tracedir="ovni"
+emubin=../emu
+
+rm -rf $tracedir
+
+# Run the test
+./$testname
+
+# Then launch the emulator in lint mode
+$emubin $tracedir
+
+#rm -rf $tracedir

test/flush.c

@@ -0,0 +1,94 @@
+/*
+ * Copyright (c) 2021 Barcelona Supercomputing Center (BSC)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#define _POSIX_C_SOURCE 200112L
+#define _GNU_SOURCE
+
+#include <stdint.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <linux/limits.h>
+#include <limits.h>
+
+#include "ovni.h"
+
+// Define gettid for older glibc versions (below 2.30)
+#if !__GLIBC_PREREQ(2, 30)
+static inline pid_t gettid(void)
+{
+	return (pid_t)syscall(SYS_gettid);
+}
+#endif
+
+static inline void
+init(void)
+{
+	char hostname[HOST_NAME_MAX];
+
+	if(gethostname(hostname, HOST_NAME_MAX) != 0)
+	{
+		perror("gethostname failed");
+		exit(EXIT_FAILURE);
+	}
+
+	ovni_proc_init(0, hostname, getpid());
+	ovni_thread_init(gettid());
+	ovni_add_cpu(0, 0);
+}
+
+static void emit(uint8_t *buf, size_t size)
+{
+	struct ovni_ev ev = {0};
+	ovni_clock_update();
+	ovni_ev_set_mcv(&ev, "O$$");
+	ovni_ev_jumbo_emit(&ev, buf, size);
+}
+
+int main(void)
+{
+	size_t payload_size;
+	uint8_t *payload_buf;
+
+	init();
+
+	payload_size = (size_t) (0.9 * (double) OVNI_MAX_EV_BUF);
+	payload_buf = calloc(1, payload_size);
+
+	if(!payload_buf)
+	{
+		perror("calloc failed");
+		exit(EXIT_FAILURE);
+	}
+
+	/* The first should fit, filling 90 % of the buffer */
+	emit(payload_buf, payload_size);
+
+	/* The second event would cause a flush */
+	emit(payload_buf, payload_size);
+
+	/* The third would cause the previous flush events to be written
+	 * to disk */
+	emit(payload_buf, payload_size);
+
+	/* Flush the last event to disk manually */
+	ovni_flush();
+	ovni_proc_fini();
+
+	return 0;
+}