2019-01-08 17:09:47 +00:00
|
|
|
use crate::{
|
|
|
|
instance::{Import, ImportResolver},
|
|
|
|
memory::LinearMemory,
|
|
|
|
module::{ImportName, Module},
|
|
|
|
table::{TableBacking, TableElements},
|
|
|
|
types::{Initializer, MapIndex, Value},
|
|
|
|
vm,
|
|
|
|
};
|
|
|
|
|
|
|
|
#[derive(Debug)]
|
|
|
|
pub struct LocalBacking {
|
|
|
|
pub memories: Box<[LinearMemory]>,
|
|
|
|
pub tables: Box<[TableBacking]>,
|
|
|
|
|
|
|
|
pub vm_memories: Box<[vm::LocalMemory]>,
|
|
|
|
pub vm_tables: Box<[vm::LocalTable]>,
|
|
|
|
pub vm_globals: Box<[vm::LocalGlobal]>,
|
|
|
|
pub vm_signatures: Box<[vm::SigId]>,
|
|
|
|
}
|
|
|
|
|
|
|
|
impl LocalBacking {
|
|
|
|
pub fn new(module: &Module, imports: &ImportBacking) -> Self {
|
|
|
|
let mut memories = Self::generate_memories(module);
|
|
|
|
let mut tables = Self::generate_tables(module);
|
|
|
|
let globals = Self::generate_globals(module);
|
|
|
|
|
|
|
|
let vm_memories = Self::finalize_memories(module, &mut memories[..]);
|
|
|
|
let vm_tables = Self::finalize_tables(module, imports, &mut tables[..]);
|
|
|
|
let vm_globals = Self::finalize_globals(module, imports, globals);
|
|
|
|
let vm_signatures = module.sig_registry.into_vm_sigid();
|
|
|
|
|
|
|
|
Self {
|
|
|
|
memories,
|
|
|
|
tables,
|
|
|
|
|
|
|
|
vm_memories,
|
|
|
|
vm_tables,
|
|
|
|
vm_globals,
|
|
|
|
vm_signatures,
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
fn generate_memories(module: &Module) -> Box<[LinearMemory]> {
|
|
|
|
let mut memories = Vec::with_capacity(module.memories.len());
|
|
|
|
|
|
|
|
for (_, mem) in &module.memories {
|
|
|
|
// If we use emscripten, we set a fixed initial and maximum
|
|
|
|
debug!("Instance - init memory ({}, {:?})", mem.min, mem.max);
|
|
|
|
// let memory = if options.abi == InstanceABI::Emscripten {
|
|
|
|
// // We use MAX_PAGES, so at the end the result is:
|
|
|
|
// // (initial * LinearMemory::PAGE_SIZE) == LinearMemory::DEFAULT_HEAP_SIZE
|
|
|
|
// // However, it should be: (initial * LinearMemory::PAGE_SIZE) == 16777216
|
|
|
|
// LinearMemory::new(LinearMemory::MAX_PAGES, None)
|
|
|
|
// } else {
|
|
|
|
// LinearMemory::new(memory.minimum, memory.maximum.map(|m| m as u32))
|
|
|
|
// };
|
|
|
|
let memory = LinearMemory::new(mem);
|
|
|
|
memories.push(memory);
|
|
|
|
}
|
|
|
|
|
|
|
|
memories.into_boxed_slice()
|
|
|
|
}
|
|
|
|
|
|
|
|
fn finalize_memories(module: &Module, memories: &mut [LinearMemory]) -> Box<[vm::LocalMemory]> {
|
|
|
|
for init in &module.data_initializers {
|
|
|
|
assert!(init.base.is_none(), "global base not supported yet");
|
|
|
|
assert!(
|
|
|
|
init.offset + init.data.len() <= memories[init.memory_index.index()].current_size()
|
|
|
|
);
|
|
|
|
let offset = init.offset;
|
|
|
|
let mem: &mut LinearMemory = &mut memories[init.memory_index.index()];
|
|
|
|
// let end_of_init = offset + init.data.len();
|
|
|
|
// if end_of_init > mem.current_size() {
|
|
|
|
// let grow_pages = (end_of_init / LinearMemory::PAGE_SIZE as usize) + 1;
|
|
|
|
// mem.grow(grow_pages as u32)
|
|
|
|
// .expect("failed to grow memory for data initializers");
|
|
|
|
// }
|
|
|
|
let to_init = &mut mem[offset..offset + init.data.len()];
|
|
|
|
to_init.copy_from_slice(&init.data);
|
|
|
|
}
|
|
|
|
|
|
|
|
memories
|
|
|
|
.iter_mut()
|
|
|
|
.map(|mem| mem.into_vm_memory())
|
|
|
|
.collect::<Vec<_>>()
|
|
|
|
.into_boxed_slice()
|
|
|
|
}
|
|
|
|
|
|
|
|
fn generate_tables(module: &Module) -> Box<[TableBacking]> {
|
|
|
|
let mut tables = Vec::with_capacity(module.tables.len());
|
|
|
|
|
|
|
|
for (_, table) in &module.tables {
|
|
|
|
let table_backing = TableBacking::new(table);
|
|
|
|
tables.push(table_backing);
|
|
|
|
}
|
|
|
|
|
|
|
|
tables.into_boxed_slice()
|
|
|
|
}
|
|
|
|
|
|
|
|
fn finalize_tables(
|
|
|
|
module: &Module,
|
|
|
|
imports: &ImportBacking,
|
|
|
|
tables: &mut [TableBacking],
|
|
|
|
) -> Box<[vm::LocalTable]> {
|
|
|
|
for init in &module.table_initializers {
|
|
|
|
assert!(init.base.is_none(), "global base not supported yet");
|
|
|
|
let table = &mut tables[init.table_index.index()];
|
|
|
|
match table.elements {
|
|
|
|
TableElements::Anyfunc(ref mut elements) => {
|
|
|
|
for (i, &func_index) in init.elements.iter().enumerate() {
|
|
|
|
let sig_index = module.func_assoc[func_index];
|
|
|
|
let vm_sig_id = vm::SigId(sig_index.index() as u32);
|
|
|
|
|
|
|
|
let func_data = if module.is_imported_function(func_index) {
|
|
|
|
imports.functions[func_index.index()].clone()
|
|
|
|
} else {
|
|
|
|
vm::ImportedFunc {
|
|
|
|
func: module
|
|
|
|
.func_resolver
|
|
|
|
.get(module, func_index)
|
|
|
|
.unwrap()
|
|
|
|
.as_ptr(),
|
|
|
|
}
|
|
|
|
};
|
|
|
|
|
|
|
|
elements[init.offset + i] = vm::Anyfunc {
|
|
|
|
func_data,
|
|
|
|
sig_id: vm_sig_id,
|
|
|
|
};
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
tables
|
|
|
|
.iter_mut()
|
|
|
|
.map(|table| table.into_vm_table())
|
|
|
|
.collect::<Vec<_>>()
|
|
|
|
.into_boxed_slice()
|
|
|
|
}
|
|
|
|
|
|
|
|
fn generate_globals(module: &Module) -> Box<[vm::LocalGlobal]> {
|
|
|
|
let globals = vec![vm::LocalGlobal::null(); module.globals.len()];
|
|
|
|
|
|
|
|
globals.into_boxed_slice()
|
|
|
|
}
|
|
|
|
|
|
|
|
fn finalize_globals(
|
|
|
|
module: &Module,
|
|
|
|
imports: &ImportBacking,
|
|
|
|
mut globals: Box<[vm::LocalGlobal]>,
|
|
|
|
) -> Box<[vm::LocalGlobal]> {
|
|
|
|
for (to, (_, from)) in globals.iter_mut().zip(module.globals.into_iter()) {
|
|
|
|
to.data = match from.init {
|
|
|
|
Initializer::Const(Value::I32(x)) => x as u64,
|
|
|
|
Initializer::Const(Value::I64(x)) => x as u64,
|
|
|
|
Initializer::Const(Value::F32(x)) => x as u64,
|
|
|
|
Initializer::Const(Value::F64(x)) => x,
|
|
|
|
Initializer::GetGlobal(index) => (imports.globals[index.index()].global).data,
|
|
|
|
};
|
|
|
|
}
|
|
|
|
|
|
|
|
globals
|
|
|
|
}
|
|
|
|
|
|
|
|
// fn generate_tables(module: &Module, _options: &InstanceOptions) -> (Box<[TableBacking]>, Box<[vm::LocalTable]>) {
|
|
|
|
// let mut tables = Vec::new();
|
|
|
|
// // Reserve space for tables
|
|
|
|
// tables.reserve_exact(module.info.tables.len());
|
|
|
|
|
|
|
|
// // Get tables in module
|
|
|
|
// for table in &module.info.tables {
|
|
|
|
// let table: Vec<usize> = match table.import_name.as_ref() {
|
|
|
|
// Some((module_name, field_name)) => {
|
|
|
|
// let imported =
|
|
|
|
// import_object.get(&module_name.as_str(), &field_name.as_str());
|
|
|
|
// match imported {
|
|
|
|
// Some(ImportValue::Table(t)) => t.to_vec(),
|
|
|
|
// None => {
|
|
|
|
// if options.mock_missing_tables {
|
|
|
|
// debug!(
|
|
|
|
// "The Imported table {}.{} is not provided, therefore will be mocked.",
|
|
|
|
// module_name, field_name
|
|
|
|
// );
|
|
|
|
// let len = table.entity.minimum as usize;
|
|
|
|
// let mut v = Vec::with_capacity(len);
|
|
|
|
// v.resize(len, 0);
|
|
|
|
// v
|
|
|
|
// } else {
|
|
|
|
// panic!(
|
|
|
|
// "Imported table value was not provided ({}.{})",
|
|
|
|
// module_name, field_name
|
|
|
|
// )
|
|
|
|
// }
|
|
|
|
// }
|
|
|
|
// _ => panic!(
|
|
|
|
// "Expected global table, but received {:?} ({}.{})",
|
|
|
|
// imported, module_name, field_name
|
|
|
|
// ),
|
|
|
|
// }
|
|
|
|
// }
|
|
|
|
// None => {
|
|
|
|
// let len = table.entity.minimum as usize;
|
|
|
|
// let mut v = Vec::with_capacity(len);
|
|
|
|
// v.resize(len, 0);
|
|
|
|
// v
|
|
|
|
// }
|
|
|
|
// };
|
|
|
|
// tables.push(table);
|
|
|
|
// }
|
|
|
|
|
|
|
|
// // instantiate tables
|
|
|
|
// for table_element in &module.info.table_elements {
|
|
|
|
// let base = match table_element.base {
|
|
|
|
// Some(global_index) => globals_data[global_index.index()] as usize,
|
|
|
|
// None => 0,
|
|
|
|
// };
|
|
|
|
|
|
|
|
// let table = &mut tables[table_element.table_index.index()];
|
|
|
|
// for (i, func_index) in table_element.elements.iter().enumerate() {
|
|
|
|
// // since the table just contains functions in the MVP
|
|
|
|
// // we get the address of the specified function indexes
|
|
|
|
// // to populate the table.
|
|
|
|
|
|
|
|
// // let func_index = *elem_index - module.info.imported_funcs.len() as u32;
|
|
|
|
// // let func_addr = functions[func_index.index()].as_ptr();
|
|
|
|
// let func_addr = get_function_addr(&func_index, &import_functions, &functions);
|
|
|
|
// table[base + table_element.offset + i] = func_addr as _;
|
|
|
|
// }
|
|
|
|
// }
|
|
|
|
// }
|
|
|
|
}
|
|
|
|
|
|
|
|
#[derive(Debug)]
|
|
|
|
pub struct ImportBacking {
|
|
|
|
pub functions: Box<[vm::ImportedFunc]>,
|
|
|
|
pub memories: Box<[vm::ImportedMemory]>,
|
|
|
|
pub tables: Box<[vm::ImportedTable]>,
|
|
|
|
pub globals: Box<[vm::ImportedGlobal]>,
|
|
|
|
}
|
|
|
|
|
|
|
|
impl ImportBacking {
|
|
|
|
pub fn new(module: &Module, imports: &dyn ImportResolver) -> Result<Self, String> {
|
|
|
|
assert!(
|
|
|
|
module.imported_memories.len() == 0,
|
|
|
|
"imported memories not yet supported"
|
|
|
|
);
|
|
|
|
assert!(
|
|
|
|
module.imported_tables.len() == 0,
|
|
|
|
"imported tables not yet supported"
|
|
|
|
);
|
|
|
|
|
|
|
|
let mut functions = Vec::with_capacity(module.imported_functions.len());
|
|
|
|
for (
|
|
|
|
index,
|
|
|
|
ImportName {
|
|
|
|
module: mod_name,
|
|
|
|
name: item_name,
|
|
|
|
},
|
|
|
|
) in &module.imported_functions
|
|
|
|
{
|
|
|
|
let sig_index = module.func_assoc[index];
|
|
|
|
let expected_sig = module.sig_registry.lookup_func_sig(sig_index);
|
|
|
|
let import = imports.get(mod_name, item_name);
|
2019-01-09 02:57:28 +00:00
|
|
|
match import {
|
2019-01-09 03:09:09 +00:00
|
|
|
Some(&Import::Func(ref func, ref signature)) => {
|
2019-01-09 02:57:28 +00:00
|
|
|
if expected_sig == signature {
|
|
|
|
functions.push(vm::ImportedFunc {
|
2019-01-09 03:09:09 +00:00
|
|
|
func: func.inner(),
|
2019-01-09 02:57:28 +00:00
|
|
|
// vmctx: ptr::null_mut(),
|
|
|
|
});
|
|
|
|
} else {
|
|
|
|
return Err(format!(
|
|
|
|
"unexpected signature for {:?}:{:?}",
|
|
|
|
mod_name, item_name
|
|
|
|
));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
Some(_) => {
|
2019-01-08 17:09:47 +00:00
|
|
|
return Err(format!(
|
2019-01-09 02:57:28 +00:00
|
|
|
"incorrect import type for {}:{}",
|
2019-01-08 17:09:47 +00:00
|
|
|
mod_name, item_name
|
|
|
|
));
|
|
|
|
}
|
2019-01-09 02:57:28 +00:00
|
|
|
None => {
|
|
|
|
return Err(format!("import not found: {}:{}", mod_name, item_name));
|
|
|
|
}
|
2019-01-08 17:09:47 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
let mut globals = Vec::with_capacity(module.imported_globals.len());
|
|
|
|
for (
|
|
|
|
_,
|
|
|
|
(
|
|
|
|
ImportName {
|
|
|
|
module: mod_name,
|
|
|
|
name: item_name,
|
|
|
|
},
|
|
|
|
global_desc,
|
|
|
|
),
|
|
|
|
) in &module.imported_globals
|
|
|
|
{
|
|
|
|
let import = imports.get(mod_name, item_name);
|
2019-01-09 02:57:28 +00:00
|
|
|
match import {
|
|
|
|
Some(Import::Global(val)) => {
|
|
|
|
if val.ty() == global_desc.ty {
|
|
|
|
globals.push(vm::ImportedGlobal {
|
|
|
|
global: vm::LocalGlobal {
|
|
|
|
data: match val {
|
|
|
|
Value::I32(n) => *n as u64,
|
|
|
|
Value::I64(n) => *n as u64,
|
|
|
|
Value::F32(n) => *n as u64,
|
|
|
|
Value::F64(n) => *n,
|
|
|
|
},
|
2019-01-08 17:09:47 +00:00
|
|
|
},
|
2019-01-09 02:57:28 +00:00
|
|
|
});
|
|
|
|
} else {
|
|
|
|
return Err(format!(
|
|
|
|
"unexpected global type for {:?}:{:?}",
|
|
|
|
mod_name, item_name
|
|
|
|
));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
Some(_) => {
|
2019-01-08 17:09:47 +00:00
|
|
|
return Err(format!(
|
2019-01-09 02:57:28 +00:00
|
|
|
"incorrect import type for {}:{}",
|
2019-01-08 17:09:47 +00:00
|
|
|
mod_name, item_name
|
|
|
|
));
|
|
|
|
}
|
2019-01-09 02:57:28 +00:00
|
|
|
None => {
|
|
|
|
return Err(format!("import not found: {}:{}", mod_name, item_name));
|
|
|
|
}
|
2019-01-08 17:09:47 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
Ok(ImportBacking {
|
|
|
|
functions: functions.into_boxed_slice(),
|
|
|
|
memories: vec![].into_boxed_slice(),
|
|
|
|
tables: vec![].into_boxed_slice(),
|
|
|
|
globals: globals.into_boxed_slice(),
|
|
|
|
})
|
|
|
|
}
|
|
|
|
}
|