From 92086dc707a7a7fb68f723cd8aa2814acf37b02d Mon Sep 17 00:00:00 2001
From: Nuri Amari <nuri@athinkingape.com>
Date: Thu, 2 Apr 2020 09:33:29 -0700
Subject: [PATCH] Add parentheses around thread id to prevent diff flamegraph

The use of the --thread option can result in stack samples that look
like "thread <thread_id> <count>". Inferno and Brendan Gregg's perl
script will treat this as a frame function of with name "thread" and two
counts. This results in the creation of differential flamegraph when not
desired. Changing the frame name to "thread (<thread_id>)" fixes this
issue.
---
 src/main.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/main.rs b/src/main.rs
index 68822e29..ccba2964 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -250,7 +250,7 @@ fn record_samples(pid: remoteprocess::Pid, config: &Config) -> Result<(), Error>
 
             if config.include_thread_ids {
                 let threadid = trace.format_threadid();
-                trace.frames.push(Frame{name: format!("thread {}", threadid),
+                trace.frames.push(Frame{name: format!("thread ({})", threadid),
                     filename: String::from(""),
                     module: None, short_filename: None, line: 0, locals: None});
             }