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Add get_global for Sandbox (#4756)

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* Add `get_global` for `Sandbox`

This pr adds `get_global` to retrieve a `global` variable from an
instantiated sandbox wasm blob.

* Bump `spec_version`

* Update primitives/wasm-interface/src/lib.rs

Co-Authored-By: Sergei Pepyakin <sergei@parity.io>

* `get_global` -> `get_global_val`

Co-authored-by: Sergei Pepyakin <s.pepyakin@gmail.com>
Co-authored-by: Gavin Wood <github@gavwood.com>
This commit is contained in:
Bastian Köcher
2020-01-29 16:24:40 +01:00
committed by GitHub
parent ae1e9002d7
commit 4c36143375
23 changed files with 275 additions and 195 deletions
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substrate/primitives/io/src/lib.rs
+8
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@@ -850,6 +850,14 @@ pub trait Sandbox {
fn instance_teardown(&mut self, instance_idx: u32) {
self.sandbox().instance_teardown(instance_idx).expect("Failed to teardown sandbox instance")
}
/// Get the value from a global with the given `name`. The sandbox is determined by the given
/// `instance_idx`.
///
/// Returns `Some(_)` when the requested global variable could be found.
fn get_global_val(&mut self, instance_idx: u32, name: &str) -> Option<sp_wasm_interface::Value> {
self.sandbox().get_global_val(instance_idx, name).expect("Failed to get global from sandbox")
}
}
/// Allocator used by Substrate when executing the Wasm runtime.