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Validate duplicate exports.

This commit is contained in:
Sergey Pepyakin 2018-02-07 15:58:31 +03:00
parent ff2bc1bcce
commit 5188a0e29c
1 changed files with 9 additions and 1 deletions
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10
src/validation/mod.rs
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@ -1,6 +1,6 @@
use std::error;
use std::fmt;
use std::collections::HashMap;
use std::collections::{HashMap, HashSet};
use parity_wasm::elements::{
BlockType, External, GlobalEntry, GlobalType, Internal, MemoryType, Module, Opcode,
ResizableLimits, TableType, ValueType, InitExpr, Type
@ -163,7 +163,15 @@ pub fn validate_module(module: Module) -> Result<ValidatedModule, Error> {
// validate export section
if let Some(export_section) = module.export_section() {
let mut export_names = HashSet::new();
for export in export_section.entries() {
// HashSet::insert returns false if item already in set.
let duplicate = export_names.insert(export.field()) == false;
if duplicate {
return Err(Error(
format!("duplicate export {}", export.field()),
));
}
match *export.internal() {
Internal::Function(function_index) => {
context.require_function(function_index)?;