From a9f643f774e27a0a626ead9e81b59f40730a30e6 Mon Sep 17 00:00:00 2001
From: Mark McCaskey <mark@wasmer.io>
Date: Wed, 15 May 2019 11:46:17 -0700
Subject: [PATCH 1/2] add trace macro for more verbose debug statements

---
 Cargo.toml                     |  1 +
 lib/runtime-core/Cargo.toml    |  1 +
 lib/runtime-core/src/macros.rs | 18 ++++++++++++++++++
 lib/wasi/src/macros.rs         |  4 ++--
 4 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/Cargo.toml b/Cargo.toml
index 5de0f17ee41..66e7a46fe8e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -44,6 +44,7 @@ rustc_version = "0.2.3"
 [features]
 default = ["fast-tests", "wasi"]
 debug = ["wasmer-runtime-core/debug"]
+trace = ["wasmer-runtime-core/trace"]
 extra-debug = ["wasmer-clif-backend/debug", "wasmer-runtime-core/debug"]
 # This feature will allow cargo test to run much faster
 fast-tests = []
diff --git a/lib/runtime-core/Cargo.toml b/lib/runtime-core/Cargo.toml
index d6b735cff43..07560d15d5f 100644
--- a/lib/runtime-core/Cargo.toml
+++ b/lib/runtime-core/Cargo.toml
@@ -50,3 +50,4 @@ rustc_version = "0.2.3"
 
 [features]
 debug = []
+trace = ["debug"]
diff --git a/lib/runtime-core/src/macros.rs b/lib/runtime-core/src/macros.rs
index edda293664e..6dbb93ca09c 100644
--- a/lib/runtime-core/src/macros.rs
+++ b/lib/runtime-core/src/macros.rs
@@ -18,6 +18,24 @@ macro_rules! debug {
     ($fmt:expr, $($arg:tt)*) => {};
 }
 
+#[macro_export]
+#[cfg(feature = "trace")]
+macro_rules! trace {
+    ($fmt:expr) => {
+        debug!($fmt)
+    };
+    ($fmt:expr, $($arg:tt)*) => {
+        debug!($fmt, $($arg)*);
+    }
+}
+
+#[macro_export]
+#[cfg(not(feature = "trace"))]
+macro_rules! trace {
+    ($fmt:expr) => {};
+    ($fmt:expr, $($arg:tt)*) => {};
+}
+
 #[macro_export]
 macro_rules! func {
     ($func:path) => {{
diff --git a/lib/wasi/src/macros.rs b/lib/wasi/src/macros.rs
index 1420b8f2d25..86b6b07dcbd 100644
--- a/lib/wasi/src/macros.rs
+++ b/lib/wasi/src/macros.rs
@@ -3,11 +3,11 @@ macro_rules! wasi_try {
         let res: Result<_, crate::syscalls::types::__wasi_errno_t> = $expr;
         match res {
             Ok(val) => {
-                debug!("wasi::wasi_try::val: {:?}", val);
+                wasmer_runtime_core::trace!("wasi::wasi_try::val: {:?}", val);
                 val
             }
             Err(err) => {
-                debug!("wasi::wasi_try::err: {:?}", err);
+                wasmer_runtime_core::trace!("wasi::wasi_try::err: {:?}", err);
                 return err;
             }
         }

From c12b9541c667def0bb99517ed5f0764339bd3b48 Mon Sep 17 00:00:00 2001
From: Mark McCaskey <mark@wasmer.io>
Date: Tue, 21 May 2019 11:46:35 -0700
Subject: [PATCH 2/2] update changelog

---
 CHANGELOG.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index ad600bdc154..e76e6b6ebef 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,8 @@ Blocks of changes will separated by version increments.
 
 ## **[Unreleased]**
 
+- [#459](https://github.com/wasmerio/wasmer/pull/459) Add monotonic and real time clocks for wasi on windows
+- [#447](https://github.com/wasmerio/wasmer/pull/447) Add trace macro (`--features trace`) for more verbose debug statements
 - [#451](https://github.com/wasmerio/wasmer/pull/451) Add `--mapdir=src:dest` flag to rename host directories in the guest context
 - [#457](https://github.com/wasmerio/wasmer/pull/457) Implement file metadata for WASI, fix bugs in WASI clock code for Unix platforms