mirror of
https://github.com/fluencelabs/wasmer
synced 2024-12-15 07:05:41 +00:00
608 lines
24 KiB
Rust
608 lines
24 KiB
Rust
use crate::{module::Converter, module_env::ModuleEnv};
|
|
use cranelift_codegen::{
|
|
cursor::FuncCursor,
|
|
ir::{self, InstBuilder},
|
|
isa,
|
|
};
|
|
use cranelift_entity::EntityRef;
|
|
use cranelift_wasm::{self, FuncEnvironment, ModuleEnvironment};
|
|
use wasmer_runtime::{
|
|
memory::LinearMemory,
|
|
structures::TypedIndex,
|
|
types::{FuncIndex, GlobalIndex, LocalOrImport, MemoryIndex, TableIndex},
|
|
vm,
|
|
};
|
|
|
|
pub struct FuncEnv<'env, 'module, 'isa> {
|
|
env: &'env ModuleEnv<'module, 'isa>,
|
|
}
|
|
|
|
impl<'env, 'module, 'isa> FuncEnv<'env, 'module, 'isa> {
|
|
pub fn new(env: &'env ModuleEnv<'module, 'isa>) -> Self {
|
|
Self { env }
|
|
}
|
|
|
|
/// Creates a signature with VMContext as the last param
|
|
pub fn generate_signature(&self, sig_index: cranelift_wasm::SignatureIndex) -> ir::Signature {
|
|
// Get signature
|
|
let mut signature = self.env.signatures[Converter(sig_index).into()].clone();
|
|
|
|
// Add the vmctx parameter type to it
|
|
signature.params.push(ir::AbiParam::special(
|
|
self.pointer_type(),
|
|
ir::ArgumentPurpose::VMContext,
|
|
));
|
|
|
|
// Return signature
|
|
signature
|
|
}
|
|
}
|
|
|
|
impl<'env, 'module, 'isa> FuncEnvironment for FuncEnv<'env, 'module, 'isa> {
|
|
/// Gets configuration information needed for compiling functions
|
|
fn target_config(&self) -> isa::TargetFrontendConfig {
|
|
self.env.target_config()
|
|
}
|
|
|
|
/// Gets native pointers types.
|
|
///
|
|
/// `I64` on 64-bit arch; `I32` on 32-bit arch.
|
|
fn pointer_type(&self) -> ir::Type {
|
|
ir::Type::int(u16::from(self.target_config().pointer_bits())).unwrap()
|
|
}
|
|
|
|
/// Gets the size of a native pointer in bytes.
|
|
fn pointer_bytes(&self) -> u8 {
|
|
self.target_config().pointer_bytes()
|
|
}
|
|
|
|
/// Sets up the necessary preamble definitions in `func` to access the global identified
|
|
/// by `index`.
|
|
///
|
|
/// The index space covers both imported and locally declared globals.
|
|
fn make_global(
|
|
&mut self,
|
|
func: &mut ir::Function,
|
|
clif_global_index: cranelift_wasm::GlobalIndex,
|
|
) -> cranelift_wasm::GlobalVariable {
|
|
let global_index: GlobalIndex = Converter(clif_global_index).into();
|
|
|
|
// Create VMContext value.
|
|
let vmctx = func.create_global_value(ir::GlobalValueData::VMContext);
|
|
let ptr_type = self.pointer_type();
|
|
|
|
match global_index.local_or_import(self.env.module) {
|
|
LocalOrImport::Local(local_global_index) => {
|
|
let globals_base_addr = func.create_global_value(ir::GlobalValueData::Load {
|
|
base: vmctx,
|
|
offset: (vm::Ctx::offset_globals() as i32).into(),
|
|
global_type: self.pointer_type(),
|
|
readonly: true,
|
|
});
|
|
|
|
let offset = local_global_index.index() * vm::LocalGlobal::size() as usize;
|
|
|
|
let local_global_addr = func.create_global_value(ir::GlobalValueData::IAddImm {
|
|
base: globals_base_addr,
|
|
offset: (offset as i64).into(),
|
|
global_type: ptr_type,
|
|
});
|
|
|
|
// Create global variable based on the data above.
|
|
cranelift_wasm::GlobalVariable::Memory {
|
|
gv: local_global_addr,
|
|
offset: (vm::LocalGlobal::offset_data() as i32).into(),
|
|
ty: self.env.get_global(clif_global_index).ty,
|
|
}
|
|
}
|
|
LocalOrImport::Import(imported_global_index) => {
|
|
let imported_globals_base_addr =
|
|
func.create_global_value(ir::GlobalValueData::Load {
|
|
base: vmctx,
|
|
offset: (vm::Ctx::offset_imported_globals() as i32).into(),
|
|
global_type: ptr_type,
|
|
readonly: true,
|
|
});
|
|
|
|
let offset = imported_global_index.index() * vm::ImportedGlobal::size() as usize;
|
|
|
|
let imported_global_addr = func.create_global_value(ir::GlobalValueData::IAddImm {
|
|
base: imported_globals_base_addr,
|
|
offset: (offset as i64).into(),
|
|
global_type: ptr_type,
|
|
});
|
|
|
|
let local_global_addr = func.create_global_value(ir::GlobalValueData::Load {
|
|
base: imported_global_addr,
|
|
offset: (vm::ImportedGlobal::offset_global() as i32).into(),
|
|
global_type: ptr_type,
|
|
readonly: true,
|
|
});
|
|
|
|
cranelift_wasm::GlobalVariable::Memory {
|
|
gv: local_global_addr,
|
|
offset: (vm::LocalGlobal::offset_data() as i32).into(),
|
|
ty: self.env.get_global(clif_global_index).ty,
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/// Sets up the necessary preamble definitions in `func` to access the linear memory identified
|
|
/// by `index`.
|
|
///
|
|
/// The index space covers both imported and locally declared memories.
|
|
fn make_heap(
|
|
&mut self,
|
|
func: &mut ir::Function,
|
|
clif_mem_index: cranelift_wasm::MemoryIndex,
|
|
) -> ir::Heap {
|
|
let mem_index: MemoryIndex = Converter(clif_mem_index).into();
|
|
// Create VMContext value.
|
|
let vmctx = func.create_global_value(ir::GlobalValueData::VMContext);
|
|
let ptr_type = self.pointer_type();
|
|
|
|
match mem_index.local_or_import(self.env.module) {
|
|
LocalOrImport::Local(local_mem_index) => {
|
|
let memories_base_addr = func.create_global_value(ir::GlobalValueData::Load {
|
|
base: vmctx,
|
|
offset: (vm::Ctx::offset_memories() as i32).into(),
|
|
global_type: ptr_type,
|
|
readonly: true,
|
|
});
|
|
|
|
let memory_offset = local_mem_index.index() * vm::LocalMemory::size() as usize;
|
|
|
|
let memory_struct_addr = func.create_global_value(ir::GlobalValueData::IAddImm {
|
|
base: memories_base_addr,
|
|
offset: (memory_offset as i64).into(),
|
|
global_type: ptr_type,
|
|
});
|
|
|
|
let memory_base_addr = func.create_global_value(ir::GlobalValueData::Load {
|
|
base: memory_struct_addr,
|
|
offset: (vm::LocalMemory::offset_base() as i32).into(),
|
|
global_type: ptr_type,
|
|
readonly: true,
|
|
});
|
|
|
|
func.create_heap(ir::HeapData {
|
|
base: memory_base_addr,
|
|
min_size: (self.env.module.memories[local_mem_index].min as u64).into(),
|
|
offset_guard_size: (LinearMemory::DEFAULT_GUARD_SIZE as u64).into(),
|
|
style: ir::HeapStyle::Static {
|
|
bound: (LinearMemory::DEFAULT_HEAP_SIZE as u64).into(),
|
|
},
|
|
index_type: ir::types::I32,
|
|
})
|
|
}
|
|
LocalOrImport::Import(imported_mem_index) => {
|
|
let imported_memories_base = func.create_global_value(ir::GlobalValueData::Load {
|
|
base: vmctx,
|
|
offset: (vm::Ctx::offset_imported_memories() as i32).into(),
|
|
global_type: ptr_type,
|
|
readonly: true,
|
|
});
|
|
|
|
let imported_memory_offset =
|
|
imported_mem_index.index() * vm::ImportedMemory::size() as usize;
|
|
|
|
let imported_memory_struct_addr =
|
|
func.create_global_value(ir::GlobalValueData::IAddImm {
|
|
base: imported_memories_base,
|
|
offset: (imported_memory_offset as i64).into(),
|
|
global_type: ptr_type,
|
|
});
|
|
|
|
let local_memory_struct_addr =
|
|
func.create_global_value(ir::GlobalValueData::Load {
|
|
base: imported_memory_struct_addr,
|
|
offset: (vm::ImportedMemory::offset_memory() as i32).into(),
|
|
global_type: ptr_type,
|
|
readonly: true,
|
|
});
|
|
|
|
let local_memory_base = func.create_global_value(ir::GlobalValueData::Load {
|
|
base: local_memory_struct_addr,
|
|
offset: (vm::LocalMemory::offset_base() as i32).into(),
|
|
global_type: ptr_type,
|
|
readonly: true,
|
|
});
|
|
|
|
func.create_heap(ir::HeapData {
|
|
base: local_memory_base,
|
|
min_size: (self.env.module.imported_memories[imported_mem_index].1.min as u64)
|
|
.into(),
|
|
offset_guard_size: (LinearMemory::DEFAULT_GUARD_SIZE as u64).into(),
|
|
style: ir::HeapStyle::Static {
|
|
bound: (LinearMemory::DEFAULT_HEAP_SIZE as u64).into(),
|
|
},
|
|
index_type: ir::types::I32,
|
|
})
|
|
}
|
|
}
|
|
}
|
|
|
|
/// Sets up the necessary preamble definitions in `func` to access the table identified
|
|
/// by `index`.
|
|
///
|
|
/// The index space covers both imported and locally declared tables.
|
|
fn make_table(
|
|
&mut self,
|
|
func: &mut ir::Function,
|
|
clif_table_index: cranelift_wasm::TableIndex,
|
|
) -> ir::Table {
|
|
let table_index: TableIndex = Converter(clif_table_index).into();
|
|
// Create VMContext value.
|
|
let vmctx = func.create_global_value(ir::GlobalValueData::VMContext);
|
|
let ptr_type = self.pointer_type();
|
|
|
|
match table_index.local_or_import(self.env.module) {
|
|
LocalOrImport::Local(local_table_index) => {
|
|
let tables_base = func.create_global_value(ir::GlobalValueData::Load {
|
|
base: vmctx,
|
|
offset: (vm::Ctx::offset_tables() as i32).into(),
|
|
global_type: ptr_type,
|
|
readonly: true,
|
|
});
|
|
|
|
let table_struct_offset =
|
|
local_table_index.index() * vm::LocalTable::size() as usize;
|
|
|
|
let table_struct_addr = func.create_global_value(ir::GlobalValueData::IAddImm {
|
|
base: tables_base,
|
|
offset: (table_struct_offset as i64).into(),
|
|
global_type: ptr_type,
|
|
});
|
|
|
|
let table_base = func.create_global_value(ir::GlobalValueData::Load {
|
|
base: table_struct_addr,
|
|
offset: (vm::LocalTable::offset_base() as i32).into(),
|
|
global_type: ptr_type,
|
|
// we will support growing tables, so this cannot be readonly.
|
|
readonly: false,
|
|
});
|
|
|
|
let table_bound = func.create_global_value(ir::GlobalValueData::Load {
|
|
base: table_struct_addr,
|
|
offset: (vm::LocalTable::offset_current_elements() as i32).into(),
|
|
// the number of elements in a table will always fit in an `i32`.
|
|
global_type: ir::types::I32,
|
|
readonly: false,
|
|
});
|
|
|
|
func.create_table(ir::TableData {
|
|
base_gv: table_base,
|
|
min_size: (self.env.module.tables[local_table_index].min as u64).into(),
|
|
bound_gv: table_bound,
|
|
element_size: (vm::Anyfunc::size() as u64).into(),
|
|
index_type: ir::types::I32,
|
|
})
|
|
}
|
|
LocalOrImport::Import(imported_table_index) => {
|
|
let imported_tables_base = func.create_global_value(ir::GlobalValueData::Load {
|
|
base: vmctx,
|
|
offset: (vm::Ctx::offset_imported_memories() as i32).into(),
|
|
global_type: ptr_type,
|
|
readonly: true,
|
|
});
|
|
|
|
let imported_table_struct_offset =
|
|
imported_table_index.index() * vm::ImportedTable::size() as usize;
|
|
|
|
let imported_table_struct_addr =
|
|
func.create_global_value(ir::GlobalValueData::IAddImm {
|
|
base: imported_tables_base,
|
|
offset: (imported_table_struct_offset as i64).into(),
|
|
global_type: ptr_type,
|
|
});
|
|
|
|
let local_table_struct_addr = func.create_global_value(ir::GlobalValueData::Load {
|
|
base: imported_table_struct_addr,
|
|
offset: (vm::ImportedTable::offset_table() as i32).into(),
|
|
global_type: ptr_type,
|
|
readonly: true,
|
|
});
|
|
|
|
let local_table_base = func.create_global_value(ir::GlobalValueData::Load {
|
|
base: local_table_struct_addr,
|
|
offset: (vm::LocalTable::offset_base() as i32).into(),
|
|
global_type: ptr_type,
|
|
readonly: false,
|
|
});
|
|
|
|
let local_table_bound = func.create_global_value(ir::GlobalValueData::Load {
|
|
base: local_table_struct_addr,
|
|
offset: (vm::LocalTable::offset_current_elements() as i32).into(),
|
|
global_type: ir::types::I32,
|
|
readonly: false,
|
|
});
|
|
|
|
func.create_table(ir::TableData {
|
|
base_gv: local_table_base,
|
|
min_size: (self.env.module.imported_tables[imported_table_index].1.min as u64)
|
|
.into(),
|
|
bound_gv: local_table_bound,
|
|
element_size: (vm::Anyfunc::size() as u64).into(),
|
|
index_type: ir::types::I32,
|
|
})
|
|
}
|
|
}
|
|
}
|
|
|
|
/// Sets up a signature definition in `func`'s preamble.
|
|
///
|
|
/// Signature may contain additional argument, but arguments marked as ArgumentPurpose::Normal`
|
|
/// must correspond to the arguments in the wasm signature
|
|
fn make_indirect_sig(
|
|
&mut self,
|
|
func: &mut ir::Function,
|
|
index: cranelift_wasm::SignatureIndex,
|
|
) -> ir::SigRef {
|
|
// Create a signature reference out of specified signature (with VMContext param added).
|
|
func.import_signature(self.generate_signature(index))
|
|
}
|
|
|
|
/// Sets up an external function definition in the preamble of `func` that can be used to
|
|
/// directly call the function `index`.
|
|
///
|
|
/// The index space covers both imported functions and functions defined in the current module.
|
|
fn make_direct_func(
|
|
&mut self,
|
|
func: &mut ir::Function,
|
|
func_index: cranelift_wasm::FuncIndex,
|
|
) -> ir::FuncRef {
|
|
// Get signature of function.
|
|
let signature_index = self.env.get_func_type(func_index);
|
|
|
|
// Create a signature reference from specified signature (with VMContext param added).
|
|
let signature = func.import_signature(self.generate_signature(signature_index));
|
|
|
|
// Get name of function.
|
|
let name = ir::ExternalName::user(0, func_index.as_u32());
|
|
|
|
// Create function reference from fuction data.
|
|
func.import_function(ir::ExtFuncData {
|
|
name,
|
|
signature,
|
|
colocated: false,
|
|
})
|
|
}
|
|
|
|
/// Generates an indirect call IR with `callee` and `call_args`.
|
|
///
|
|
/// Inserts instructions at `pos` to the function `callee` in the table
|
|
/// `table_index` with WebAssembly signature `sig_index`
|
|
#[cfg_attr(feature = "cargo-clippy", allow(clippy::too_many_arguments))]
|
|
fn translate_call_indirect(
|
|
&mut self,
|
|
mut pos: FuncCursor,
|
|
_table_index: cranelift_wasm::TableIndex,
|
|
table: ir::Table,
|
|
sig_index: cranelift_wasm::SignatureIndex,
|
|
sig_ref: ir::SigRef,
|
|
callee: ir::Value,
|
|
call_args: &[ir::Value],
|
|
) -> cranelift_wasm::WasmResult<ir::Inst> {
|
|
// Get the pointer type based on machine's pointer size.
|
|
let ptr_type = self.pointer_type();
|
|
|
|
// The `callee` value is an index into a table of Anyfunc structures.
|
|
let entry_addr = pos.ins().table_addr(ptr_type, table, callee, 0);
|
|
|
|
let mflags = ir::MemFlags::trusted();
|
|
|
|
let func_ptr = pos.ins().load(
|
|
ptr_type,
|
|
mflags,
|
|
entry_addr,
|
|
vm::Anyfunc::offset_func() as i32,
|
|
);
|
|
let vmctx_ptr = pos.ins().load(
|
|
ptr_type,
|
|
mflags,
|
|
entry_addr,
|
|
vm::Anyfunc::offset_vmctx() as i32,
|
|
);
|
|
let found_sig = pos.ins().load(
|
|
ir::types::I32,
|
|
mflags,
|
|
entry_addr,
|
|
vm::Anyfunc::offset_sig_id() as i32,
|
|
);
|
|
|
|
pos.ins().trapz(func_ptr, ir::TrapCode::IndirectCallToNull);
|
|
|
|
let deduplicated_sig_index = self
|
|
.env
|
|
.module
|
|
.sig_registry
|
|
.lookup_deduplicated_sigindex(Converter(sig_index).into());
|
|
let expected_sig = pos
|
|
.ins()
|
|
.iconst(ir::types::I32, deduplicated_sig_index.index() as i64);
|
|
let not_equal_flags = pos.ins().ifcmp(found_sig, expected_sig);
|
|
|
|
pos.ins().trapif(
|
|
ir::condcodes::IntCC::NotEqual,
|
|
not_equal_flags,
|
|
ir::TrapCode::BadSignature,
|
|
);
|
|
|
|
// Build a value list for the indirect call instruction containing the call_args
|
|
// and the vmctx parameter.
|
|
let mut args = Vec::with_capacity(call_args.len() + 1);
|
|
args.extend(call_args.iter().cloned());
|
|
args.push(vmctx_ptr);
|
|
|
|
Ok(pos.ins().call_indirect(sig_ref, func_ptr, &args))
|
|
}
|
|
|
|
/// Generates a call IR with `callee` and `call_args` and inserts it at `pos`
|
|
/// TODO: add support for imported functions
|
|
fn translate_call(
|
|
&mut self,
|
|
mut pos: FuncCursor,
|
|
clif_callee_index: cranelift_wasm::FuncIndex,
|
|
callee: ir::FuncRef,
|
|
call_args: &[ir::Value],
|
|
) -> cranelift_wasm::WasmResult<ir::Inst> {
|
|
let callee_index: FuncIndex = Converter(clif_callee_index).into();
|
|
|
|
match callee_index.local_or_import(self.env.module) {
|
|
LocalOrImport::Local(_) => {
|
|
// this is an internal function
|
|
let vmctx = pos
|
|
.func
|
|
.special_param(ir::ArgumentPurpose::VMContext)
|
|
.expect("missing vmctx parameter");
|
|
|
|
let mut args = Vec::with_capacity(call_args.len() + 1);
|
|
args.extend(call_args.iter().cloned());
|
|
args.push(vmctx);
|
|
|
|
Ok(pos.ins().call(callee, &args))
|
|
}
|
|
LocalOrImport::Import(imported_func_index) => {
|
|
let ptr_type = self.pointer_type();
|
|
// this is an imported function
|
|
let vmctx = pos.func.create_global_value(ir::GlobalValueData::VMContext);
|
|
|
|
let imported_funcs = pos.func.create_global_value(ir::GlobalValueData::Load {
|
|
base: vmctx,
|
|
offset: (vm::Ctx::offset_imported_funcs() as i32).into(),
|
|
global_type: ptr_type,
|
|
readonly: true,
|
|
});
|
|
|
|
let imported_func_offset =
|
|
imported_func_index.index() * vm::ImportedFunc::size() as usize;
|
|
|
|
let imported_func_struct_addr =
|
|
pos.func.create_global_value(ir::GlobalValueData::IAddImm {
|
|
base: imported_funcs,
|
|
offset: (imported_func_offset as i64).into(),
|
|
global_type: ptr_type,
|
|
});
|
|
|
|
let imported_func_addr = pos.func.create_global_value(ir::GlobalValueData::Load {
|
|
base: imported_func_struct_addr,
|
|
offset: (vm::ImportedFunc::offset_func() as i32).into(),
|
|
global_type: ptr_type,
|
|
readonly: true,
|
|
});
|
|
|
|
let imported_vmctx_addr = pos.func.create_global_value(ir::GlobalValueData::Load {
|
|
base: imported_func_struct_addr,
|
|
offset: (vm::ImportedFunc::offset_vmctx() as i32).into(),
|
|
global_type: ptr_type,
|
|
readonly: true,
|
|
});
|
|
|
|
let imported_func_addr = pos.ins().global_value(ptr_type, imported_func_addr);
|
|
let imported_vmctx_addr = pos.ins().global_value(ptr_type, imported_vmctx_addr);
|
|
|
|
let sig_ref = pos.func.dfg.ext_funcs[callee].signature;
|
|
|
|
let mut args = Vec::with_capacity(call_args.len() + 1);
|
|
args.extend(call_args.iter().cloned());
|
|
args.push(imported_vmctx_addr);
|
|
|
|
Ok(pos
|
|
.ins()
|
|
.call_indirect(sig_ref, imported_func_addr, &args[..]))
|
|
}
|
|
}
|
|
}
|
|
|
|
/// Generates code corresponding to wasm `memory.grow`.
|
|
///
|
|
/// `index` refers to the linear memory to query.
|
|
///
|
|
/// `heap` refers to the IR generated by `make_heap`.
|
|
///
|
|
/// `val` refers the value to grow the memory by.
|
|
fn translate_memory_grow(
|
|
&mut self,
|
|
mut pos: FuncCursor,
|
|
index: cranelift_wasm::MemoryIndex,
|
|
_heap: ir::Heap,
|
|
val: ir::Value,
|
|
) -> cranelift_wasm::WasmResult<ir::Value> {
|
|
let signature = pos.func.import_signature(ir::Signature {
|
|
call_conv: self.target_config().default_call_conv,
|
|
params: vec![
|
|
ir::AbiParam::new(ir::types::I32),
|
|
ir::AbiParam::new(ir::types::I32),
|
|
ir::AbiParam::special(self.pointer_type(), ir::ArgumentPurpose::VMContext),
|
|
],
|
|
returns: vec![ir::AbiParam::new(ir::types::I32)],
|
|
});
|
|
|
|
let grow_mem_func = pos.func.import_function(ir::ExtFuncData {
|
|
// `ir::ExternalName` for static_grow_memory`
|
|
name: ir::ExternalName::user(1, 0),
|
|
signature,
|
|
colocated: false,
|
|
});
|
|
|
|
// Create a memory index value.
|
|
let memory_index = pos.ins().iconst(ir::types::I32, index.index() as i64);
|
|
|
|
// Create a VMContext value.
|
|
let vmctx = pos
|
|
.func
|
|
.special_param(ir::ArgumentPurpose::VMContext)
|
|
.expect("missing vmctx parameter");
|
|
|
|
// Insert call instructions for `grow_memory`.
|
|
let call_inst = pos.ins().call(grow_mem_func, &[memory_index, val, vmctx]);
|
|
|
|
// Return value.
|
|
Ok(*pos.func.dfg.inst_results(call_inst).first().unwrap())
|
|
}
|
|
|
|
/// Generates code corresponding to wasm `memory.size`.
|
|
///
|
|
/// `index` refers to the linear memory to query.
|
|
///
|
|
/// `heap` refers to the IR generated by `make_heap`.
|
|
fn translate_memory_size(
|
|
&mut self,
|
|
mut pos: FuncCursor,
|
|
index: cranelift_wasm::MemoryIndex,
|
|
_heap: ir::Heap,
|
|
) -> cranelift_wasm::WasmResult<ir::Value> {
|
|
let signature = pos.func.import_signature(ir::Signature {
|
|
call_conv: self.target_config().default_call_conv,
|
|
params: vec![
|
|
ir::AbiParam::new(ir::types::I32),
|
|
ir::AbiParam::special(self.pointer_type(), ir::ArgumentPurpose::VMContext),
|
|
],
|
|
returns: vec![ir::AbiParam::new(ir::types::I32)],
|
|
});
|
|
|
|
let size_mem_func = pos.func.import_function(ir::ExtFuncData {
|
|
// `ir::ExternalName` for static_grow_memory`
|
|
name: ir::ExternalName::user(1, 1),
|
|
signature,
|
|
colocated: false,
|
|
});
|
|
|
|
// Create a memory index value.
|
|
let memory_index = pos.ins().iconst(ir::types::I32, index.index() as i64);
|
|
|
|
// Create a VMContext value.
|
|
let vmctx = pos
|
|
.func
|
|
.special_param(ir::ArgumentPurpose::VMContext)
|
|
.expect("missing vmctx parameter");
|
|
|
|
// Insert call instructions for `grow_memory`.
|
|
let call_inst = pos.ins().call(size_mem_func, &[memory_index, vmctx]);
|
|
|
|
// Return value.
|
|
Ok(*pos.func.dfg.inst_results(call_inst).first().unwrap())
|
|
}
|
|
}
|