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use crate::engine::{UniversalEngine, UniversalEngineInner};
use crate::link::link_module;
use enumset::EnumSet;
use loupe::MemoryUsage;
use std::sync::{Arc, Mutex};
#[cfg(feature = "compiler")]
use wasmer_compiler::ModuleEnvironment;
use wasmer_compiler::{CompileError, CpuFeature, Features, Triple};
use wasmer_engine::{
register_frame_info, Artifact, DeserializeError, FunctionExtent, GlobalFrameInfoRegistration,
MetadataHeader, SerializeError,
};
#[cfg(feature = "compiler")]
use wasmer_engine::{Engine, Tunables};
use wasmer_engine_universal_artifact::ArtifactCreate;
use wasmer_engine_universal_artifact::{SerializableModule, UniversalArtifactBuild};
use wasmer_types::entity::{BoxedSlice, PrimaryMap};
use wasmer_types::{
FunctionIndex, LocalFunctionIndex, MemoryIndex, ModuleInfo, OwnedDataInitializer,
SignatureIndex, TableIndex,
};
use wasmer_vm::{
FuncDataRegistry, FunctionBodyPtr, MemoryStyle, TableStyle, VMSharedSignatureIndex,
VMTrampoline,
};
#[derive(MemoryUsage)]
pub struct UniversalArtifact {
artifact: UniversalArtifactBuild,
finished_functions: BoxedSlice<LocalFunctionIndex, FunctionBodyPtr>,
#[loupe(skip)]
finished_function_call_trampolines: BoxedSlice<SignatureIndex, VMTrampoline>,
finished_dynamic_function_trampolines: BoxedSlice<FunctionIndex, FunctionBodyPtr>,
signatures: BoxedSlice<SignatureIndex, VMSharedSignatureIndex>,
func_data_registry: Arc<FuncDataRegistry>,
frame_info_registration: Mutex<Option<GlobalFrameInfoRegistration>>,
finished_function_lengths: BoxedSlice<LocalFunctionIndex, usize>,
}
impl UniversalArtifact {
#[cfg(feature = "compiler")]
pub fn new(
engine: &UniversalEngine,
data: &[u8],
tunables: &dyn Tunables,
) -> Result<Self, CompileError> {
let environ = ModuleEnvironment::new();
let mut inner_engine = engine.inner_mut();
let translation = environ.translate(data).map_err(CompileError::Wasm)?;
let module = translation.module;
let memory_styles: PrimaryMap<MemoryIndex, MemoryStyle> = module
.memories
.values()
.map(|memory_type| tunables.memory_style(memory_type))
.collect();
let table_styles: PrimaryMap<TableIndex, TableStyle> = module
.tables
.values()
.map(|table_type| tunables.table_style(table_type))
.collect();
let artifact = UniversalArtifactBuild::new(
inner_engine.builder_mut(),
data,
engine.target(),
memory_styles,
table_styles,
)?;
Self::from_parts(&mut inner_engine, artifact)
}
#[cfg(not(feature = "compiler"))]
pub fn new(_engine: &UniversalEngine, _data: &[u8]) -> Result<Self, CompileError> {
Err(CompileError::Codegen(
"Compilation is not enabled in the engine".to_string(),
))
}
pub unsafe fn deserialize(
engine: &UniversalEngine,
bytes: &[u8],
) -> Result<Self, DeserializeError> {
if !UniversalArtifactBuild::is_deserializable(bytes) {
return Err(DeserializeError::Incompatible(
"The provided bytes are not wasmer-universal".to_string(),
));
}
let bytes = &bytes[UniversalArtifactBuild::MAGIC_HEADER.len()..];
let metadata_len = MetadataHeader::parse(bytes)?;
let metadata_slice: &[u8] = &bytes[MetadataHeader::LEN..][..metadata_len];
let serializable = SerializableModule::deserialize(metadata_slice)?;
let artifact = UniversalArtifactBuild::from_serializable(serializable);
let mut inner_engine = engine.inner_mut();
Self::from_parts(&mut inner_engine, artifact).map_err(DeserializeError::Compiler)
}
pub fn from_parts(
engine_inner: &mut UniversalEngineInner,
artifact: UniversalArtifactBuild,
) -> Result<Self, CompileError> {
let (
finished_functions,
finished_function_call_trampolines,
finished_dynamic_function_trampolines,
custom_sections,
) = engine_inner.allocate(
artifact.module_ref(),
artifact.get_function_bodies_ref(),
artifact.get_function_call_trampolines_ref(),
artifact.get_dynamic_function_trampolines_ref(),
artifact.get_custom_sections_ref(),
)?;
link_module(
artifact.module_ref(),
&finished_functions,
artifact.get_function_relocations().clone(),
&custom_sections,
artifact.get_custom_section_relocations_ref(),
artifact.get_libcall_trampolines(),
artifact.get_libcall_trampoline_len(),
);
let signatures = {
let signature_registry = engine_inner.signatures();
artifact
.module()
.signatures
.values()
.map(|sig| signature_registry.register(sig))
.collect::<PrimaryMap<_, _>>()
};
let eh_frame = match artifact.get_debug_ref() {
Some(debug) => {
let eh_frame_section_size = artifact.get_custom_sections_ref()[debug.eh_frame]
.bytes
.len();
let eh_frame_section_pointer = custom_sections[debug.eh_frame];
Some(unsafe {
std::slice::from_raw_parts(*eh_frame_section_pointer, eh_frame_section_size)
})
}
None => None,
};
engine_inner.publish_compiled_code();
engine_inner.publish_eh_frame(eh_frame)?;
let finished_function_lengths = finished_functions
.values()
.map(|extent| extent.length)
.collect::<PrimaryMap<LocalFunctionIndex, usize>>()
.into_boxed_slice();
let finished_functions = finished_functions
.values()
.map(|extent| extent.ptr)
.collect::<PrimaryMap<LocalFunctionIndex, FunctionBodyPtr>>()
.into_boxed_slice();
let finished_function_call_trampolines =
finished_function_call_trampolines.into_boxed_slice();
let finished_dynamic_function_trampolines =
finished_dynamic_function_trampolines.into_boxed_slice();
let signatures = signatures.into_boxed_slice();
let func_data_registry = engine_inner.func_data().clone();
Ok(Self {
artifact,
finished_functions,
finished_function_call_trampolines,
finished_dynamic_function_trampolines,
signatures,
frame_info_registration: Mutex::new(None),
finished_function_lengths,
func_data_registry,
})
}
pub fn get_default_extension(triple: &Triple) -> &'static str {
UniversalArtifactBuild::get_default_extension(triple)
}
pub fn is_deserializable(bytes: &[u8]) -> bool {
UniversalArtifactBuild::is_deserializable(bytes)
}
}
impl ArtifactCreate for UniversalArtifact {
fn module(&self) -> Arc<ModuleInfo> {
self.artifact.module()
}
fn module_ref(&self) -> &ModuleInfo {
self.artifact.module_ref()
}
fn module_mut(&mut self) -> Option<&mut ModuleInfo> {
self.artifact.module_mut()
}
fn features(&self) -> &Features {
self.artifact.features()
}
fn cpu_features(&self) -> EnumSet<CpuFeature> {
self.artifact.cpu_features()
}
fn data_initializers(&self) -> &[OwnedDataInitializer] {
self.artifact.data_initializers()
}
fn memory_styles(&self) -> &PrimaryMap<MemoryIndex, MemoryStyle> {
self.artifact.memory_styles()
}
fn table_styles(&self) -> &PrimaryMap<TableIndex, TableStyle> {
self.artifact.table_styles()
}
fn serialize(&self) -> Result<Vec<u8>, SerializeError> {
self.artifact.serialize()
}
}
impl Artifact for UniversalArtifact {
fn register_frame_info(&self) {
let mut info = self.frame_info_registration.lock().unwrap();
if info.is_some() {
return;
}
let finished_function_extents = self
.finished_functions
.values()
.copied()
.zip(self.finished_function_lengths.values().copied())
.map(|(ptr, length)| FunctionExtent { ptr, length })
.collect::<PrimaryMap<LocalFunctionIndex, _>>()
.into_boxed_slice();
let frame_infos = self.artifact.get_frame_info_ref();
*info = register_frame_info(
self.artifact.module(),
&finished_function_extents,
frame_infos.clone(),
);
}
fn finished_functions(&self) -> &BoxedSlice<LocalFunctionIndex, FunctionBodyPtr> {
&self.finished_functions
}
fn finished_function_call_trampolines(&self) -> &BoxedSlice<SignatureIndex, VMTrampoline> {
&self.finished_function_call_trampolines
}
fn finished_dynamic_function_trampolines(&self) -> &BoxedSlice<FunctionIndex, FunctionBodyPtr> {
&self.finished_dynamic_function_trampolines
}
fn signatures(&self) -> &BoxedSlice<SignatureIndex, VMSharedSignatureIndex> {
&self.signatures
}
fn func_data_registry(&self) -> &FuncDataRegistry {
&self.func_data_registry
}
}