From ba7e2b70edb24441e4e91a46235e75ecc3521ef7 Mon Sep 17 00:00:00 2001
From: losfair <zhy20000919@hotmail.com>
Date: Sun, 13 Oct 2019 20:51:48 +0800
Subject: [PATCH] Add block-trace flag to CLI.

---
 src/bin/wasmer.rs | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/bin/wasmer.rs b/src/bin/wasmer.rs
index e54fddd93..4cd4cd58e 100644
--- a/src/bin/wasmer.rs
+++ b/src/bin/wasmer.rs
@@ -179,6 +179,10 @@ struct Run {
     #[structopt(long = "call-trace")]
     call_trace: bool,
 
+    // Enable the BlockTrace middleware.
+    #[structopt(long = "block-trace")]
+    block_trace: bool,
+
     /// The command name is a string that will override the first argument passed
     /// to the wasm program. This is used in wapm to provide nicer output in
     /// help commands and error messages of the running wasm program
@@ -834,6 +838,10 @@ fn get_compiler_by_backend(backend: Backend, opts: &Run) -> Option<Box<dyn Compi
             use wasmer_middleware_common::call_trace::CallTrace;
             middlewares.push(CallTrace::new());
         }
+        if opts.block_trace {
+            use wasmer_middleware_common::block_trace::BlockTrace;
+            middlewares.push(BlockTrace::new());
+        }
         middlewares
     };