From 1dcb3f482253f5b8c486cfd69e024b5057f7487c Mon Sep 17 00:00:00 2001
From: Rodrigo Arias <rodrigo.arias@bsc.es>
Date: Fri, 11 Apr 2025 15:14:35 +0200
Subject: [PATCH] Check ovniemu -b works without can_breakdown set

Ensure that we can successfully process a trace that has nOS-V threads
without the can_breakdown flag set to true. We simply don't enable the
nOS-V breakdown, but other models can enable it.
---
 test/emu/nosv/CMakeLists.txt     |  3 ++-
 test/emu/nosv/cannot-breakdown.c | 26 ++++++++++++++++++++++++++
 2 files changed, 28 insertions(+), 1 deletion(-)
 create mode 100644 test/emu/nosv/cannot-breakdown.c

diff --git a/test/emu/nosv/CMakeLists.txt b/test/emu/nosv/CMakeLists.txt
index 832159b..dcfe850 100644
--- a/test/emu/nosv/CMakeLists.txt
+++ b/test/emu/nosv/CMakeLists.txt
@@ -1,4 +1,4 @@
-# Copyright (c) 2022-2024 Barcelona Supercomputing Center (BSC)
+# Copyright (c) 2022-2025 Barcelona Supercomputing Center (BSC)
 # SPDX-License-Identifier: GPL-3.0-or-later
 
 test_emu(attach.c)
@@ -18,6 +18,7 @@ test_emu(require-missing.c
   NAME flag-enable-all
   DRIVER "flag-enable-all.driver.sh"
   REGEX "all .* models are enabled")
+test_emu(cannot-breakdown.c BREAKDOWN REGEX "WARN: cannot enable breakdown for nOS-V model")
 test_emu(parallel-tasks.c)
 test_emu(nest-to-parallel.c)
 test_emu(mutex.c)
diff --git a/test/emu/nosv/cannot-breakdown.c b/test/emu/nosv/cannot-breakdown.c
new file mode 100644
index 0000000..c8cc15e
--- /dev/null
+++ b/test/emu/nosv/cannot-breakdown.c
@@ -0,0 +1,26 @@
+/* Copyright (c) 2025 Barcelona Supercomputing Center (BSC)
+ * SPDX-License-Identifier: GPL-3.0-or-later */
+
+#include <ovni.h>
+#include "instr_nosv.h"
+
+/* Test that we can request the -b flag but still have threads that don't have
+ * the nosv.can_breakdown attribute set to true. OpenMP may enable the breakdown
+ * on its own. */
+
+int
+main(void)
+{
+	instr_start(0, 1);
+	/* Don't enable nosv model via instr_nosv_init() as that would set the
+	 * nosv.can_breakdown to 1 */
+	instr_require("nosv");
+	ovni_attr_set_boolean("nosv.can_breakdown", 0);
+
+	/* Emit a nosv event */
+	instr_nosv_type_create(666);
+
+	instr_end();
+
+	return 0;
+}