initial commit

libraries/FastLED/tests/crash_handler_libunwind.h

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+#ifndef CRASH_HANDLER_LIBUNWIND_H
+#define CRASH_HANDLER_LIBUNWIND_H
+
+#ifdef USE_LIBUNWIND
+
+#include <libunwind.h>
+#include <csignal>
+#include <cstdio>
+#include <cstdlib>
+
+namespace crash_handler_libunwind {
+
+inline void print_stacktrace_libunwind() {
+    // Use libunwind for better stack traces
+    unw_cursor_t cursor;
+    unw_context_t context;
+
+    unw_getcontext(&context);
+    unw_init_local(&cursor, &context);
+
+    int depth = 0;
+    printf("Stack trace (libunwind):\n");
+    while (unw_step(&cursor) > 0) {
+        unw_word_t offset, pc;
+        char sym[256];
+
+        unw_get_reg(&cursor, UNW_REG_IP, &pc);
+        if (pc == 0) {
+            break;
+        }
+
+        printf("#%-2d 0x%lx:", depth++, pc);
+
+        if (unw_get_proc_name(&cursor, sym, sizeof(sym), &offset) == 0) {
+            printf(" (%s+0x%lx)\n", sym, offset);
+        } else {
+            printf(" -- symbol not found\n");
+        }
+    }
+}
+
+inline void crash_handler(int sig) {
+    fprintf(stderr, "Error: signal %d:\n", sig);
+    print_stacktrace_libunwind();
+    exit(1);
+}
+
+inline void setup_crash_handler() {
+    // Set up POSIX signal handlers
+    signal(SIGABRT, crash_handler);
+    signal(SIGFPE, crash_handler);
+    signal(SIGILL, crash_handler);
+    signal(SIGINT, crash_handler);
+    signal(SIGSEGV, crash_handler);
+    signal(SIGTERM, crash_handler);
+    
+    // libunwind is ready to use
+}
+
+inline void print_stacktrace() {
+    print_stacktrace_libunwind();
+}
+
+} // namespace crash_handler_libunwind
+
+#endif // USE_LIBUNWIND
+
+#endif // CRASH_HANDLER_LIBUNWIND_H