From a03c43fc44290df41b1d662219e0d31c5ea8e074 Mon Sep 17 00:00:00 2001
From: Sina Mahmoodi <itz.s1na@gmail.com>
Date: Thu, 11 Apr 2019 10:46:43 +0200
Subject: [PATCH] Add unsafe debug methods

Update debug mod docs

Add feature flag for debug api
---
 Cargo.toml   |  1 +
 src/debug.rs | 10 ++++++++++
 src/lib.rs   |  3 +++
 3 files changed, 14 insertions(+)
 create mode 100644 src/debug.rs

diff --git a/Cargo.toml b/Cargo.toml
index 30bb711..2b39700 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -10,3 +10,4 @@ edition = "2018"
 [features]
 default = [ "std" ]
 std = []
+debug = []
diff --git a/src/debug.rs b/src/debug.rs
new file mode 100644
index 0000000..bb26520
--- /dev/null
+++ b/src/debug.rs
@@ -0,0 +1,10 @@
+/// The native debug interface exposed to the ewasm contract. These functions are for testing
+/// purposes only. On a live VM, any bytecode trying to import these symbols will be rejected.
+extern "C" {
+    pub fn debug_print32(value: u32);
+    pub fn debug_print64(value: u64);
+    pub fn debug_printMem(offset: *const u32, len: u32);
+    pub fn debug_printMemHex(offset: *const u32, len: u32);
+    pub fn debug_printStorage(pathOffset: *const u32);
+    pub fn debug_printStorageHex(pathOffset: *const u32);
+}
diff --git a/src/lib.rs b/src/lib.rs
index e74a45b..1dbf645 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -21,6 +21,9 @@
 mod native;
 pub mod types;
 
+#[cfg(feature = "debug")]
+pub mod debug;
+
 #[cfg(not(feature = "std"))]
 pub mod convert;