fluencelabs/parity-wasm
1
0
Fork 0
mirror of https://github.com/fluencelabs/parity-wasm synced 2025-06-13 23:11:53 +00:00
Code Issues Projects Releases Wiki Activity

Add data section validation

Browse Source
This commit is contained in:
Sergey Pepyakin
2017-12-05 16:31:16 +01:00
parent 74f4c7c49a
commit d30e4052cb
1 changed files with 17 additions and 13 deletions
Download Patch File Download Diff File Expand all files Collapse all files

30
src/validation/mod.rs
View File

@ -132,7 +132,17 @@ pub fn validate_module(module: &Module) -> Result<ValidatedModule, Error> {
}
// TODO: data section
// use data section to initialize linear memory regions
if let Some(data_section) = module.data_section() {
for data_segment in data_section.entries() {
context.require_memory(data_segment.index())?;
let init_ty = data_segment.offset().expr_const_type(context.globals())?;
if init_ty != ValueType::I32 {
return Err(Error(format!("segment offset should return I32")));
}
}
}
// TODO: element section
let ModuleContext {
@ -251,7 +261,6 @@ impl TableType {
impl GlobalEntry {
fn validate(&self, globals: &[GlobalType]) -> Result<(), Error> {
let init = self.init_expr();
init.validate(globals)?;
let init_expr_ty = init.expr_const_type(globals)?;
if init_expr_ty != self.global_type().content_type() {
return Err(Error(format!(
@ -265,22 +274,14 @@ impl GlobalEntry {
}
impl InitExpr {
fn validate(&self, globals: &[GlobalType]) -> Result<(), Error> {
/// Returns type of this constant expression.
fn expr_const_type(&self, globals: &[GlobalType]) -> Result<ValueType, Error> {
let code = self.code();
if code.len() != 2 {
return Err(Error(
format!("Init expression should always be with length 2"),
format!("Init expression should always be with length 2")
));
}
let _ = self.expr_const_type(globals)?;
if code[1] != Opcode::End {
return Err(Error(format!("Expression doesn't ends with `end` opcode")));
}
Ok(())
}
fn expr_const_type(&self, globals: &[GlobalType]) -> Result<ValueType, Error> {
let code = self.code();
let expr_ty: ValueType = match code[0] {
Opcode::I32Const(_) => ValueType::I32,
Opcode::I64Const(_) => ValueType::I64,
@ -301,6 +302,9 @@ impl InitExpr {
},
_ => return Err(Error(format!("Non constant opcode in init expr"))),
};
if code[1] != Opcode::End {
return Err(Error(format!("Expression doesn't ends with `end` opcode")));
}
Ok(expr_ty)
}
}