Merge "Add corkscrew support for finding static symbols."

std::string CorkscrewCurrent::GetFunctionNameRaw(uintptr_t pc, uintptr_t* offset) {

  *offset = 0;

  // Get information about the current thread.

  Dl_info info;

  const backtrace_map_info_t* map_info = backtrace_obj_->FindMapInfo(pc);

  const char* symbol_name = NULL;

  if (map_info && dladdr((const void*)pc, &info) && info.dli_sname) {

  if (map_info) {

    if (dladdr((const void*)pc, &info)) {

      if (info.dli_sname) {

        *offset = pc - map_info->start - (uintptr_t)info.dli_saddr + (uintptr_t)info.dli_fbase;

    symbol_name = info.dli_sname;

    return symbol_name;

        return info.dli_sname;

      }

    } else {

      // dladdr(3) didn't find a symbol; maybe it's static? Look in the ELF file...

      symbol_table_t* symbol_table = load_symbol_table(map_info->name);

      if (symbol_table) {

        // First check if we can find the symbol using a relative pc.

        std::string name;

        const symbol_t* elf_symbol = find_symbol(symbol_table, pc - map_info->start);

        if (elf_symbol) {

          name = elf_symbol->name;

          *offset = pc - map_info->start - elf_symbol->start;

        } else if ((elf_symbol = find_symbol(symbol_table, pc)) != NULL) {

          // Found the symbol using the absolute pc.

          name = elf_symbol->name;

          *offset = pc - elf_symbol->start;

        }

        free_symbol_table(symbol_table);

        return name;

      }

    }

  }

  return "";

}