vmtester: Add create function name search heuristic

test/vmtester/vmtester.cpp

@@ -35,6 +35,38 @@ evmc_instance* get_vm_instance()
     return vm.get();
 }
 
+std::vector<std::string> get_vm_names(const fs::path path)
+{
+    std::vector<std::string> names;
+
+    // Get the filename without extension.
+    auto name = path.stem().string();
+
+    // Skip the optional library name prefix.
+    const std::string lib_name_prefix{"lib"};
+    if (name.find(lib_name_prefix) == 0)
+        name = name.substr(lib_name_prefix.size());
+
+    size_t hyphen_pos = 0;
+    const std::string hyphen{"-"};
+    if ((hyphen_pos = name.find(hyphen)) != std::string::npos)
+    {
+        // Replace the hyphen with underscore.
+        name.replace(hyphen_pos, hyphen.size(), "_");
+        names.emplace_back(name);
+
+        // Also add the  name without the hyphen-separated prefix.
+        names.emplace_back(name.substr(hyphen_pos + hyphen.size()));
+    }
+    else
+    {
+        // Add the filename as the name.
+        names.emplace_back(std::move(name));
+    }
+
+    return names;
+}
+
 int main(int argc, char* argv[])
 {
     try
@@ -65,23 +97,37 @@ int main(int argc, char* argv[])
 
         opts::notify(variables_map);
 
-        auto symbols = dll::library_info{vm_path}.symbols();
-        auto it = std::find_if(symbols.begin(), symbols.end(), [](const std::string& symbol) {
-            return symbol.find("evmc_create_") == 0;
-        });
-        if (it == symbols.end())
+        std::cout << "Testing " << vm_path.filename().string() << "\n"
+                  << "Path: " << vm_path.string() << "\n";
+
+        for (auto&& name : get_vm_names(vm_path))
+        {
+            try
+            {
+                const std::string create_fn_name = "evmc_create_" + name;
+                std::cout << "Seeking `" << create_fn_name << "`... ";
+                create_fn = dll::import<evmc_create_fn>(vm_path, create_fn_name);
+                std::cout << "found.\n";
+                break;
+            }
+            catch (boost::system::system_error& err)
+            {
+                using namespace boost::system;
+                const error_code windows_error{127, system_category()};
+                constexpr auto posix_error = errc::invalid_seek;
+                if (err.code() != posix_error && err.code() != windows_error)
+                    throw;  // Error other than "symbol not found".
+                std::cout << "not found.\n";
+            }
+        }
+
+        if (!create_fn)
         {
             std::cerr << "EVMC create function not found in " << vm_path.string() << "\n";
             return 2;
         }
-        const std::string& create_fn_name = *it;
-
-        std::cout << "Testing " << vm_path.filename().string() << "\n  "
-                  << "Path: " << vm_path.string() << "\n  "
-                  << "Create function: " << create_fn_name << "()\n\n";
-
-        create_fn = dll::import<evmc_create_fn>(vm_path, create_fn_name);
 
+        std::cout << std::endl;
         return RUN_ALL_TESTS();
     }
     catch (const std::exception& ex)