[examples] Add generic fiber stack overflow example

Author: salkinium

examples/generic/fiber_overflow/main.cpp

@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 2024, Niklas Hauser
+ *
+ * This file is part of the modm project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+// ----------------------------------------------------------------------------
+
+#include <modm/board.hpp>
+#include <modm/processing.hpp>
+
+using namespace Board;
+using namespace std::chrono_literals;
+
+
+bool overflow{false};
+
+modm::Fiber<> bad_fiber([]
+{
+	while(1)
+	{
+#ifdef __AVR__
+		if (overflow) asm volatile ("push r1");
+#else
+		if (overflow) asm volatile ("push {r0-r7}");
+#endif
+		modm::this_fiber::yield();
+	}
+});
+
+modm::Fiber<> blinky([]
+{
+	while(1)
+	{
+		Board::Leds::toggle();
+		modm::this_fiber::sleep_for(0.5s);
+		char c;
+		modm::log::info.get(c);
+		if (c == 'o') overflow = true;
+	}
+});
+
+int
+main()
+{
+	Board::initialize();
+	Board::Leds::setOutput();
+	MODM_LOG_INFO << "\nReboot!\nSend 'o' to overflow the stack!" << modm::endl;
+	modm::delay(1s);
+
+	modm::fiber::Scheduler::run();
+
+	return 0;
+}

examples/generic/fiber_overflow/project.xml

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+<library>
+  <extends>modm:nucleo-u575zi-q</extends>
+  <!-- <extends>modm:nucleo-g071rb</extends> -->
+  <!-- <extends>modm:nucleo-l476rg</extends> -->
+  <!-- <extends>modm:mega-2560-pro</extends> -->
+  <!-- <extends>modm:arduino-uno</extends> -->
+  <options>
+    <option name="modm:build:build.path">../../../build/generic/fiber_overflow</option>
+  </options>
+  <modules>
+    <module>modm:build:scons</module>
+    <module>modm:processing:fiber</module>
+  </modules>
+</library>