intial commit

source/mijin/debug/symbol_info.cpp

@@ -0,0 +1,87 @@
+
+#include "symbol_info.hpp"
+
+#include <unordered_map>
+#include "../detect.hpp"
+
+#if MIJIN_TARGET_OS == MIJIN_OS_LINUX
+#if !defined(_GNU_SOURCE)
+#define _GNU_SOURCE
+#endif
+#include <dlfcn.h>
+#endif
+
+#if MIJIN_COMPILER == MIJIN_COMPILER_GCC
+#include <cxxabi.h>
+#endif
+
+namespace mijin
+{
+
+//
+// internal defines
+//
+
+//
+// internal constants
+//
+
+//
+// internal types
+//
+
+//
+// internal variables
+//
+
+static thread_local std::unordered_map<const void*, std::string> g_functionNameCache;
+
+//
+// internal functions
+//
+
+//
+// public functions
+//
+
+const char* lookupFunctionName(const void* function)
+{
+    auto it = g_functionNameCache.find(function);
+    if (it != g_functionNameCache.end()) {
+        return it->second.c_str();
+    }
+
+#if MIJIN_TARGET_OS == MIJIN_OS_LINUX
+    Dl_info info;
+    dladdr(function, &info);
+
+    std::string name = demangleCPPIdentifier(info.dli_sname);
+    if (name.empty()) {
+        name = info.dli_sname;
+    }
+#else
+    std::string name = "<unknown>";
+#endif
+    return g_functionNameCache.insert({function, std::move(name)}).first->second.c_str();
+}
+
+#if MIJIN_COMPILER == MIJIN_COMPILER_GCC
+std::string demangleCPPIdentifier(const char* identifier)
+{
+    char* demangled = abi::__cxa_demangle(identifier, /* output_buffer = */ nullptr, /* length = */ nullptr, /* status = */ nullptr);
+    if (demangled != nullptr)
+    {
+        std::string name = demangled;
+        std::free(demangled); // NOLINT(cppcoreguidelines-owning-memory,cppcoreguidelines-no-malloc)
+        return name;
+    }
+    return "";
+}
+#else
+std::string demangleCPPIdentifier(const char* /* identifier */)
+{
+    return "";
+}
+#endif
+
+} // namespace mijin