add trace macro for more verbose debug statements

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
 

Cargo.toml

@@ -48,6 +48,7 @@ rustc_version = "0.2.3"
 default = ["fast-tests", "wasi"]
 "loader:kernel" = ["wasmer-kernel-loader"]
 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 = []

lib/runtime-core/Cargo.toml

@@ -49,4 +49,5 @@ blake2b_simd = "0.4.1"
 rustc_version = "0.2.3"
 
 [features]
-debug = []
+debug = []
+trace = ["debug"]

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) => {{

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;
             }
         }