feat: runtime linking

crates/mun/src/lib.rs

@@ -40,14 +40,12 @@ where
                     Arg::with_name("manifest-path")
                         .long("manifest-path")
                         .takes_value(true)
-                        .help(&format!("Path to {}", MANIFEST_FILENAME))
-                )
-                .arg(
-                    Arg::with_name("watch")
-                        .long("watch")
-                        .help("Run the compiler in watch mode.\
-                        Watch input files and trigger recompilation on changes.",)
+                        .help(&format!("Path to {}", MANIFEST_FILENAME)),
                 )
+                .arg(Arg::with_name("watch").long("watch").help(
+                    "Run the compiler in watch mode.\
+                        Watch input files and trigger recompilation on changes.",
+                ))
                 .arg(
                     Arg::with_name("opt-level")
                         .short("O")
@@ -71,7 +69,7 @@ where
                 .arg(
                     Arg::with_name("emit-ir")
                         .long("emit-ir")
-                        .help("emits IR instead of a *.munlib")
+                        .help("emits IR instead of a *.munlib"),
                 )
                 .about("Compiles a local Mun file into a module"),
         )
@@ -88,25 +86,24 @@ where
                         .long("entry")
                         .takes_value(true)
                         .help("the function entry point to call on startup"),
-                )
-                .arg(
-                    Arg::with_name("delay")
-                        .long("delay")
-                        .takes_value(true)
-                        .help("how much to delay received filesystem events (in ms). This allows bundling of identical events, e.g. when several writes to the same file are detected. A high delay will make hot reloading less responsive. (defaults to 10 ms)"),
                 ),
         )
         .subcommand(
-            SubCommand::with_name("new")
-                .arg(Arg::with_name("path").help("the path to create a new project").required(true).index(1))
-        )
-        .subcommand(
-            SubCommand::with_name("init")
-            .arg(Arg::with_name("path").help("the path to create a new project [default: .]").index(1))
+            SubCommand::with_name("new").arg(
+                Arg::with_name("path")
+                    .help("the path to create a new project")
+                    .required(true)
+                    .index(1),
+            ),
         )
         .subcommand(
-            SubCommand::with_name("language-server")
+            SubCommand::with_name("init").arg(
+                Arg::with_name("path")
+                    .help("the path to create a new project [default: .]")
+                    .index(1),
+            ),
         )
+        .subcommand(SubCommand::with_name("language-server"))
         .get_matches_from_safe(args);
 
     match matches {

crates/mun/src/ops/start.rs

@@ -1,6 +1,4 @@
-use std::cell::RefCell;
-use std::rc::Rc;
-use std::time::Duration;
+use std::{cell::RefCell, rc::Rc};
 
 use anyhow::anyhow;
 use clap::ArgMatches;
@@ -57,12 +55,5 @@ fn runtime(matches: &ArgMatches) -> Result<Rc<RefCell<Runtime>>, anyhow::Error>
         matches.value_of("LIBRARY").unwrap(), // Safe because its a required arg
     );
 
-    let builder = if let Some(delay) = matches.value_of("delay") {
-        let delay: u64 = delay.parse()?;
-        builder.set_delay(Duration::from_millis(delay))
-    } else {
-        builder
-    };
-
     builder.spawn()
 }

crates/mun_codegen/Cargo.toml

@@ -13,6 +13,7 @@ keywords = ["game", "hot-reloading", "language", "mun", "scripting"]
 categories = ["Game development", "Mun"]
 
 [dependencies]
+rustc-hash = "1.1.0"
 abi = { version = "=0.2.0", path = "../mun_abi", package = "mun_abi" }
 bytemuck = "1.4.1"
 hir = { version = "=0.2.0", path = "../mun_hir", package = "mun_hir" }
@@ -30,14 +31,14 @@ paste = "0.1.6"
 parking_lot = "0.10"
 inkwell = { version = "=0.1.0-beta.2", features = ["llvm11-0", "no-libffi-linking"]}
 by_address = "1.0.4"
+paths = {path="../mun_paths", package="mun_paths"}
 
 [dev-dependencies]
 abi = { path = "../mun_abi", package = "mun_abi" }
 insta = "0.16"
 libloader = { path = "../mun_libloader", package = "mun_libloader" }
 mun_test = { path = "../mun_test" }
 runtime = { path = "../mun_runtime", package = "mun_runtime" }
-paths = {path="../mun_paths", package="mun_paths"}
 
 [build-dependencies]
 semver = "0.9.0"

crates/mun_codegen/src/assembly.rs

@@ -1,6 +1,7 @@
 use crate::{
-    code_gen::{CodeGenContext, ModuleBuilder, ObjectFile},
+    code_gen::{AssemblyBuilder, CodeGenContext, ObjectFile},
     db::CodeGenDatabase,
+    ModuleGroupId,
 };
 use anyhow::anyhow;
 use inkwell::context::Context;
@@ -41,12 +42,14 @@ impl<'db, 'ink, 'ctx> Assembly<'db, 'ink, 'ctx> {
 
 /// Builds an assembly for the specified file
 fn build_assembly<'db, 'ink, 'ctx>(
-    code_gen_context: &'ctx CodeGenContext<'db, 'ink>,
-    module: hir::Module,
+    db: &'db dyn CodeGenDatabase,
+    code_gen: &'ctx CodeGenContext<'db, 'ink>,
+    module_group_id: ModuleGroupId,
 ) -> Assembly<'db, 'ink, 'ctx> {
-    let module_builder =
-        ModuleBuilder::new(code_gen_context, module).expect("could not create ModuleBuilder");
+    // Setup the code generation context
+    let module_partition = db.module_partition();
 
+    let module_builder = AssemblyBuilder::new(&code_gen, &module_partition, module_group_id);
     module_builder.build().expect("unable to create assembly")
 }
 
@@ -81,14 +84,14 @@ impl TargetAssembly {
 /// Builds an assembly for the specified module.
 pub(crate) fn build_target_assembly(
     db: &dyn CodeGenDatabase,
-    module: hir::Module,
+    module_group: ModuleGroupId,
 ) -> Arc<TargetAssembly> {
     // Setup the code generation context
     let inkwell_context = Context::create();
     let code_gen_context = CodeGenContext::new(&inkwell_context, db);
 
     // Build an assembly for the module
-    let assembly = build_assembly(&code_gen_context, module);
+    let assembly = build_assembly(db, &code_gen_context, module_group);
 
     // Convert the assembly into an object file
     let obj_file = assembly
@@ -135,13 +138,16 @@ impl AssemblyIR {
 }
 
 /// Builds an IR file for the specified module.
-pub(crate) fn build_assembly_ir(db: &dyn CodeGenDatabase, module: hir::Module) -> Arc<AssemblyIR> {
+pub(crate) fn build_assembly_ir(
+    db: &dyn CodeGenDatabase,
+    module_group: ModuleGroupId,
+) -> Arc<AssemblyIR> {
     // Setup the code generation context
     let inkwell_context = Context::create();
     let code_gen_context = CodeGenContext::new(&inkwell_context, db);
 
-    // Build an assembly for the file
-    let assembly = build_assembly(&code_gen_context, module);
+    // Build an assembly for the module
+    let assembly = build_assembly(db, &code_gen_context, module_group);
 
     // Construct a temporary file for the assembly
     let file = NamedTempFile::new().expect("could not create temp file for shared object");

crates/mun_codegen/src/code_gen.rs

@@ -4,17 +4,17 @@ use inkwell::{
     OptimizationLevel,
 };
 
+pub use assembly_builder::AssemblyBuilder;
+pub use context::CodeGenContext;
+pub use error::CodeGenerationError;
+pub(crate) use object_file::ObjectFile;
+
+mod assembly_builder;
 mod context;
 mod error;
-mod module_builder;
 mod object_file;
 pub mod symbols;
 
-pub use context::CodeGenContext;
-pub use error::CodeGenerationError;
-pub use module_builder::ModuleBuilder;
-pub(crate) use object_file::ObjectFile;
-
 /// Optimizes the specified LLVM `Module` using the default passes for the given
 /// `OptimizationLevel`.
 fn optimize_module(module: &Module, optimization_lvl: OptimizationLevel) {

crates/mun_codegen/src/code_gen/module_builder.rs → crates/mun_codegen/src/code_gen/assembly_builder.rs

@@ -3,40 +3,43 @@ use crate::{
     code_gen::{optimize_module, symbols, CodeGenContext, CodeGenerationError},
     ir::{file::gen_file_ir, file_group::gen_file_group_ir},
     value::{IrTypeContext, IrValueContext},
+    ModuleGroupId, ModulePartition,
 };
 use inkwell::module::{Linkage, Module};
+use rustc_hash::FxHashSet;
 
-/// A struct that can be used to build an LLVM `Module`.
-pub struct ModuleBuilder<'db, 'ink, 'ctx> {
+/// A struct that can be used to build an `Assembly<'db, 'ink', ctx>`
+pub struct AssemblyBuilder<'db, 'ink, 'ctx, 't> {
     code_gen: &'ctx CodeGenContext<'db, 'ink>,
-    module: hir::Module,
+    module_group_partition: &'t ModulePartition,
+    module_group_id: ModuleGroupId,
     assembly_module: Module<'ink>,
 }
 
-impl<'db, 'ink, 'ctx> ModuleBuilder<'db, 'ink, 'ctx> {
-    /// Constructs a module for the given `hir::FileId` using the provided `CodeGenContext`.
-    pub fn new(
+impl<'db, 'ink, 'ctx, 't> AssemblyBuilder<'db, 'ink, 'ctx, 't> {
+    /// Constructs a new `AssemblyBuilder` for the given module group.
+    pub(crate) fn new(
         code_gen: &'ctx CodeGenContext<'db, 'ink>,
-        module: hir::Module,
-    ) -> Result<Self, anyhow::Error> {
+        module_group_partition: &'t ModulePartition,
+        module_group_id: ModuleGroupId,
+    ) -> Self {
         // Construct a module for the assembly
-        let file_id = module
-            .file_id(code_gen.db)
-            .expect("module must have a file");
-        let assembly_module =
-            code_gen.create_module(code_gen.db.file_relative_path(file_id).as_str());
+        let module_group = &module_group_partition[module_group_id];
+        let assembly_module = code_gen.create_module(&module_group.name);
 
-        Ok(Self {
+        Self {
             code_gen,
-            module,
+            module_group_id,
             assembly_module,
-        })
+            module_group_partition,
+        }
     }
 
     /// Constructs an object file.
     pub fn build(self) -> Result<Assembly<'db, 'ink, 'ctx>, anyhow::Error> {
-        let group_ir = gen_file_group_ir(self.code_gen, self.module);
-        let file = gen_file_ir(self.code_gen, &group_ir, self.module);
+        let module_group = &self.module_group_partition[self.module_group_id];
+        let group_ir = gen_file_group_ir(self.code_gen, module_group);
+        let file = gen_file_ir(self.code_gen, &group_ir, module_group);
 
         // Clone the LLVM modules so that we can modify it without modifying the cached value.
         self.assembly_module
@@ -70,6 +73,20 @@ impl<'db, 'ink, 'ctx> ModuleBuilder<'db, 'ink, 'ctx> {
             module: &self.assembly_module,
         };
 
+        // Build the set of dependencies
+        let dependencies = group_ir
+            .referenced_modules
+            .iter()
+            .filter_map(|&module| self.module_group_partition.group_for_module(module))
+            .collect::<FxHashSet<_>>()
+            .into_iter()
+            .map(|group_id| {
+                self.module_group_partition[group_id]
+                    .relative_file_path()
+                    .to_string()
+            })
+            .collect();
+
         // Generate the `get_info` method.
         symbols::gen_reflection_ir(
             self.code_gen.db,
@@ -79,6 +96,7 @@ impl<'db, 'ink, 'ctx> ModuleBuilder<'db, 'ink, 'ctx> {
             &group_ir.type_table,
             &self.code_gen.hir_types,
             self.code_gen.optimization_level,
+            dependencies,
         );
 
         // Optimize the assembly module

crates/mun_codegen/src/code_gen/symbols.rs

@@ -10,7 +10,8 @@ use crate::{
     value::{AsValue, CanInternalize, Global, IrValueContext, IterAsIrValue, Value},
 };
 use hir::{HirDatabase, Ty};
-use inkwell::{attributes::Attribute, module::Linkage, AddressSpace};
+use inkwell::{attributes::Attribute, module::Linkage};
+use std::convert::TryFrom;
 use std::{collections::HashSet, ffi::CString};
 
 /// Construct a `MunFunctionPrototype` struct for the specified HIR function.
@@ -21,7 +22,7 @@ fn gen_prototype_from_function<'ink>(
     hir_types: &HirTypeCache,
 ) -> ir::FunctionPrototype<'ink> {
     let module = context.module;
-    let name = function.name(db).to_string();
+    let name = function.full_name(db);
 
     // Internalize the name of the function prototype
     let name_str = CString::new(name.clone())
@@ -120,8 +121,12 @@ fn gen_signature_return_type_from_type_info<'ink>(
 ) -> Value<'ink, *const ir::TypeInfo<'ink>> {
     ret_type
         .map(|info| {
-            TypeTable::get(context.module, &info, context)
-                .expect("could not find TypeInfo that should definitely be there")
+            TypeTable::get(context.module, &info, context).unwrap_or_else(|| {
+                panic!(
+                    "could not find TypeInfo that should definitely be there: {}",
+                    info.name
+                )
+            })
         })
         .unwrap_or_else(|| Value::null(context))
 }
@@ -200,6 +205,7 @@ fn gen_dispatch_table<'ink>(
 /// Constructs IR that exposes the types and symbols in the specified module. A function called
 /// `get_info` is constructed that returns a struct `MunAssemblyInfo`. See the `mun_abi` crate
 /// for the ABI that `get_info` exposes.
+#[allow(clippy::too_many_arguments)]
 pub(super) fn gen_reflection_ir<'db, 'ink>(
     db: &'db dyn HirDatabase,
     context: &IrValueContext<'ink, '_, '_>,
@@ -208,6 +214,7 @@ pub(super) fn gen_reflection_ir<'db, 'ink>(
     type_table: &TypeTable<'ink>,
     hir_types: &HirTypeCache<'db, 'ink>,
     optimization_level: inkwell::OptimizationLevel,
+    dependencies: Vec<String>,
 ) {
     let module = context.module;
 
@@ -235,7 +242,14 @@ pub(super) fn gen_reflection_ir<'db, 'ink>(
     let dispatch_table = gen_dispatch_table(context, dispatch_table);
 
     // Construct the actual `get_info` function
-    gen_get_info_fn(db, context, module_info, dispatch_table, optimization_level);
+    gen_get_info_fn(
+        db,
+        context,
+        module_info,
+        dispatch_table,
+        optimization_level,
+        dependencies,
+    );
     gen_set_allocator_handle_fn(context);
     gen_get_version_fn(context);
 }
@@ -247,9 +261,9 @@ fn gen_get_info_fn<'ink>(
     module_info: ir::ModuleInfo<'ink>,
     dispatch_table: ir::DispatchTable<'ink>,
     optimization_level: inkwell::OptimizationLevel,
+    dependencies: Vec<String>,
 ) {
     let target = db.target();
-    let str_type = context.context.i8_type().ptr_type(AddressSpace::Generic);
 
     // Construct the return type of the `get_info` method. Depending on the C ABI this is either the
     // `MunAssemblyInfo` struct or void. On windows the return argument is passed back to the caller
@@ -319,11 +333,24 @@ fn gen_get_info_fn<'ink>(
     builder.build_store(dispatch_table_addr, dispatch_table.as_value(context).value);
     builder.build_store(
         dependencies_addr,
-        str_type.ptr_type(AddressSpace::Generic).const_null(),
+        dependencies
+            .iter()
+            .enumerate()
+            .map(|(idx, name)| {
+                CString::new(name.as_str())
+                    .expect("could not convert dependency name to string")
+                    .intern(format!("dependency{}", idx), context)
+                    .as_value(context)
+            })
+            .into_const_private_pointer_or_null("dependencies", context)
+            .value,
     );
     builder.build_store(
         num_dependencies_addr,
-        context.context.i32_type().const_int(0u64, false),
+        context.context.i32_type().const_int(
+            u32::try_from(dependencies.len()).expect("too many dependencies") as u64,
+            false,
+        ),
     );
 
     // Construct the return statement of the function.