Implement caching for parser refactor

lib/llvm-backend/src/code.rs

@@ -10,10 +10,11 @@ use inkwell::{
 use smallvec::SmallVec;
 use std::sync::Arc;
 use wasmer_runtime_core::{
-    backend::Backend,
+    backend::{Backend, CacheGen, Token},
+    cache::{Artifact, Error as CacheError},
     codegen::*,
     memory::MemoryType,
-    module::ModuleInfo,
+    module::{ModuleInfo, ModuleInner},
     structures::{Map, SliceMap, TypedIndex},
     types::{
         FuncIndex, FuncSig, GlobalIndex, LocalFuncIndex, LocalOrImport, MemoryIndex, SigIndex,
@@ -25,7 +26,7 @@ use wasmparser::{
     Type as WpType,
 };
 
-use crate::backend::LLVMBackend;
+use crate::backend::{LLVMBackend, LLVMCache};
 use crate::intrinsics::{CtxType, GlobalCache, Intrinsics, MemoryCache};
 use crate::read_info::type_to_type;
 use crate::state::{ControlFrame, IfElseState, State};
@@ -4640,7 +4641,10 @@ impl ModuleCodeGenerator<LLVMFunctionCodeGenerator, LLVMBackend, CodegenError>
         Ok(self.functions.last_mut().unwrap())
     }
 
-    fn finalize(self, module_info: &ModuleInfo) -> Result<LLVMBackend, CodegenError> {
+    fn finalize(
+        self,
+        module_info: &ModuleInfo,
+    ) -> Result<(LLVMBackend, Box<dyn CacheGen>), CodegenError> {
         //         self.module.print_to_stderr();
 
         generate_trampolines(
@@ -4668,8 +4672,8 @@ impl ModuleCodeGenerator<LLVMFunctionCodeGenerator, LLVMBackend, CodegenError>
 
         // self.module.print_to_stderr();
 
-        let (backend, _cache_gen) = LLVMBackend::new(self.module, self.intrinsics);
+        let (backend, cache_gen) = LLVMBackend::new(self.module, self.intrinsics);
-        Ok(backend)
+        Ok((backend, Box::new(cache_gen)))
     }
 
     fn feed_signatures(&mut self, signatures: Map<SigIndex, FuncSig>) -> Result<(), CodegenError> {
@@ -4693,4 +4697,17 @@ impl ModuleCodeGenerator<LLVMFunctionCodeGenerator, LLVMBackend, CodegenError>
         self.func_import_count += 1;
         Ok(())
     }
+
+    unsafe fn from_cache(artifact: Artifact, _: Token) -> Result<ModuleInner, CacheError> {
+        let (info, _, memory) = artifact.consume();
+        let (backend, cache_gen) =
+            LLVMBackend::from_buffer(memory).map_err(CacheError::DeserializeError)?;
+
+        Ok(ModuleInner {
+            runnable_module: Box::new(backend),
+            cache_gen: Box::new(cache_gen),
+
+            info,
+        })
+    }
 }

lib/runtime-core/src/codegen.rs

@@ -50,7 +50,7 @@ pub trait ModuleCodeGenerator<FCG: FunctionCodeGenerator<E>, RM: RunnableModule,
 
     /// Creates a new function and returns the function-scope code generator for it.
     fn next_function(&mut self) -> Result<&mut FCG, E>;
-    fn finalize(self, module_info: &ModuleInfo) -> Result<RM, E>;
+    fn finalize(self, module_info: &ModuleInfo) -> Result<(RM, Box<dyn CacheGen>), E>;
     fn feed_signatures(&mut self, signatures: Map<SigIndex, FuncSig>) -> Result<(), E>;
 
     /// Sets function signatures.
@@ -58,6 +58,8 @@ pub trait ModuleCodeGenerator<FCG: FunctionCodeGenerator<E>, RM: RunnableModule,
 
     /// Adds an import function.
     fn feed_import_function(&mut self) -> Result<(), E>;
+
+    unsafe fn from_cache(cache: Artifact, _: Token) -> Result<ModuleInner, CacheError>;
 }
 
 pub struct StreamingCompiler<
@@ -131,15 +133,6 @@ impl<
         compiler_config: CompilerConfig,
         _: Token,
     ) -> CompileResult<ModuleInner> {
-        struct Placeholder;
-        impl CacheGen for Placeholder {
-            fn generate_cache(&self) -> Result<(Box<[u8]>, Memory), CacheError> {
-                Err(CacheError::Unknown(
-                    "the streaming compiler API doesn't support caching yet".to_string(),
-                ))
-            }
-        }
-
         let mut mcg = MCG::new();
         let mut chain = (self.middleware_chain_generator)();
         let info = crate::parse::read_module(
@@ -149,22 +142,24 @@ impl<
             &mut chain,
             &compiler_config,
         )?;
-        let exec_context = mcg
+        let (exec_context, cache_gen) =
-            .finalize(&info)
+            mcg.finalize(&info)
                 .map_err(|x| CompileError::InternalError {
                     msg: format!("{:?}", x),
                 })?;
         Ok(ModuleInner {
-            cache_gen: Box::new(Placeholder),
+            cache_gen,
             runnable_module: Box::new(exec_context),
-            info: info,
+            info,
         })
     }
 
-    unsafe fn from_cache(&self, _artifact: Artifact, _: Token) -> Result<ModuleInner, CacheError> {
+    unsafe fn from_cache(
-        Err(CacheError::Unknown(
+        &self,
-            "the streaming compiler API doesn't support caching yet".to_string(),
+        artifact: Artifact,
-        ))
+        token: Token,
+    ) -> Result<ModuleInner, CacheError> {
+        MCG::from_cache(artifact, token)
     }
 }
 

lib/singlepass-backend/src/codegen_x64.rs

@@ -10,10 +10,11 @@ use smallvec::SmallVec;
 use std::ptr::NonNull;
 use std::{any::Any, collections::HashMap, sync::Arc};
 use wasmer_runtime_core::{
-    backend::{Backend, RunnableModule},
+    backend::{sys::Memory, Backend, CacheGen, RunnableModule, Token},
+    cache::{Artifact, Error as CacheError},
     codegen::*,
     memory::MemoryType,
-    module::ModuleInfo,
+    module::{ModuleInfo, ModuleInner},
     structures::{Map, TypedIndex},
     typed_func::Wasm,
     types::{
@@ -349,7 +350,10 @@ impl ModuleCodeGenerator<X64FunctionCode, X64ExecutionContext, CodegenError>
         Ok(self.functions.last_mut().unwrap())
     }
 
-    fn finalize(mut self, _: &ModuleInfo) -> Result<X64ExecutionContext, CodegenError> {
+    fn finalize(
+        mut self,
+        _: &ModuleInfo,
+    ) -> Result<(X64ExecutionContext, Box<dyn CacheGen>), CodegenError> {
         let (assembler, mut br_table_data, breakpoints) = match self.functions.last_mut() {
             Some(x) => (
                 x.assembler.take().unwrap(),
@@ -404,7 +408,17 @@ impl ModuleCodeGenerator<X64FunctionCode, X64ExecutionContext, CodegenError>
                 .collect(),
         );
 
-        Ok(X64ExecutionContext {
+        struct Placeholder;
+        impl CacheGen for Placeholder {
+            fn generate_cache(&self) -> Result<(Box<[u8]>, Memory), CacheError> {
+                Err(CacheError::Unknown(
+                    "the singlepass backend doesn't support caching yet".to_string(),
+                ))
+            }
+        }
+
+        Ok((
+            X64ExecutionContext {
                 code: output,
                 functions: self.functions,
                 signatures: self.signatures.as_ref().unwrap().clone(),
@@ -412,7 +426,9 @@ impl ModuleCodeGenerator<X64FunctionCode, X64ExecutionContext, CodegenError>
                 breakpoints: breakpoints,
                 func_import_count: self.func_import_count,
                 function_pointers: out_labels,
-        })
+            },
+            Box::new(Placeholder),
+        ))
     }
 
     fn feed_signatures(&mut self, signatures: Map<SigIndex, FuncSig>) -> Result<(), CodegenError> {
@@ -461,6 +477,12 @@ impl ModuleCodeGenerator<X64FunctionCode, X64ExecutionContext, CodegenError>
 
         Ok(())
     }
+
+    unsafe fn from_cache(artifact: Artifact, _: Token) -> Result<ModuleInner, CacheError> {
+        Err(CacheError::Unknown(
+            "the singlepass compiler API doesn't support caching yet".to_string(),
+        ))
+    }
 }
 
 impl X64FunctionCode {