From df3776bc0f7f250a7650fcaea67ac4a869cbcb80 Mon Sep 17 00:00:00 2001
From: Cameron Taggart <cameron.taggart@gmail.com>
Date: Mon, 20 Apr 2020 18:09:11 -0600
Subject: [PATCH] allow wasm32 compilation of
 librustc_data_structures/profiling.rs

---
 src/librustc_data_structures/profiling.rs | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/src/librustc_data_structures/profiling.rs b/src/librustc_data_structures/profiling.rs
index 23f3558cbdfa..7377b7a6c8bb 100644
--- a/src/librustc_data_structures/profiling.rs
+++ b/src/librustc_data_structures/profiling.rs
@@ -99,10 +99,12 @@ use parking_lot::RwLock;
 
 /// MmapSerializatioSink is faster on macOS and Linux
 /// but FileSerializationSink is faster on Windows
-#[cfg(not(windows))]
+#[cfg(all(not(windows),not(target_arch="wasm32")))]
 type SerializationSink = measureme::MmapSerializationSink;
-#[cfg(windows)]
+#[cfg(all(windows,not(target_arch="wasm32")))]
 type SerializationSink = measureme::FileSerializationSink;
+#[cfg(target_arch="wasm32")]
+type SerializationSink = measureme::ByteVecSink;
 
 type Profiler = measureme::Profiler<SerializationSink>;
 
@@ -602,7 +604,7 @@ pub fn duration_to_secs_str(dur: std::time::Duration) -> String {
 }
 
 // Memory reporting
-#[cfg(unix)]
+#[cfg(all(unix,not(target_arch="wasm32")))]
 fn get_resident() -> Option<usize> {
     let field = 1;
     let contents = fs::read("/proc/self/statm").ok()?;
@@ -612,7 +614,7 @@ fn get_resident() -> Option<usize> {
     Some(npages * 4096)
 }
 
-#[cfg(windows)]
+#[cfg(all(windows,not(target_arch="wasm32")))]
 fn get_resident() -> Option<usize> {
     use std::mem::{self, MaybeUninit};
     use winapi::shared::minwindef::DWORD;
@@ -630,3 +632,8 @@ fn get_resident() -> Option<usize> {
         }
     }
 }
+
+#[cfg(target_arch="wasm32")]
+fn get_resident() -> Option<usize> {
+    None
+}