Extract util methods

tracetools/src/utils.cpp

@@ -0,0 +1,28 @@
+#if defined(WITH_LTTNG) && !defined(_WIN32)
+#include <dlfcn.h>
+#include <cxxabi.h>
+#endif
+
+const char * get_symbol(void * funptr) {
+#define SYMBOL_UNKNOWN "UNKNOWN"
+#if defined(WITH_LTTNG) && !defined(_WIN32)
+#define SYMBOL_LAMBDA "[lambda]"
+    if (funptr == 0) {
+        return SYMBOL_LAMBDA;
+    }
+
+    Dl_info info;
+    if (dladdr(funptr, &info) == 0) {
+        return SYMBOL_UNKNOWN;
+    }
+
+    char * demangled = nullptr;
+    int status;
+    demangled = abi::__cxa_demangle(info.dli_sname, NULL, 0, &status);
+    // Use demangled symbol if possible
+    const char * demangled_val = (status == 0 ? demangled : info.dli_sname);
+    return (demangled_val != 0 ? demangled_val : SYMBOL_UNKNOWN);
+#else
+  return SYMBOL_UNKNOWN;
+#endif
+}