Add collapser for built in Visual Studio profiler

Cargo.toml

@@ -75,6 +75,11 @@ name = "inferno-collapse-vtune"
 path = "src/bin/collapse-vtune.rs"
 required-features = ["cli"]
 
+[[bin]]
+name = "inferno-collapse-vsprof"
+path = "src/bin/collapse-vsprof.rs"
+required-features = ["cli"]
+
 [[bin]]
 name = "inferno-collapse-guess"
 path = "src/bin/collapse-guess.rs"

src/bin/collapse-vsprof.rs

@@ -0,0 +1,52 @@
+use std::io;
+use std::path::PathBuf;
+
+use clap::Parser;
+use env_logger::Env;
+use inferno::collapse::vsprof::Folder;
+use inferno::collapse::Collapse;
+
+#[derive(Debug, Parser)]
+#[clap(
+    name = "inferno-collapse-vsprof",
+    about,
+    after_help = "\
+[1] This processes the call tree summary of the built in Visual Studio profiler"
+)]
+struct Opt {
+    // ************* //
+    // *** FLAGS *** //
+    // ************* //
+    /// Silence all log output
+    #[clap(short = 'q', long = "quiet")]
+    quiet: bool,
+
+    /// Verbose logging mode (-v, -vv, -vvv)
+    #[clap(short = 'v', long = "verbose", parse(from_occurrences))]
+    verbose: usize,
+
+    // ************ //
+    // *** ARGS *** //
+    // ************ //
+    #[clap(value_name = "PATH")]
+    /// Call tree summary file from the built in Visual Studio profiler, or STDIN if not specified
+    infile: Option<PathBuf>,
+}
+
+fn main() -> io::Result<()> {
+    let opt = Opt::parse();
+
+    // Initialize logger
+    if !opt.quiet {
+        env_logger::Builder::from_env(Env::default().default_filter_or(match opt.verbose {
+            0 => "warn",
+            1 => "info",
+            2 => "debug",
+            _ => "trace",
+        }))
+        .format_timestamp(None)
+        .init();
+    }
+
+    Folder::default().collapse_file_to_stdout(opt.infile)
+}

src/collapse/guess.rs

@@ -3,7 +3,7 @@ use std::io::{self, Cursor};
 
 use log::{error, info};
 
-use crate::collapse::{self, dtrace, perf, sample, vtune, Collapse};
+use crate::collapse::{self, dtrace, perf, sample, vsprof, vtune, Collapse};
 
 const LINES_PER_ITERATION: usize = 10;
 
@@ -69,10 +69,11 @@ impl Collapse for Folder {
         };
         let mut sample = sample::Folder::default();
         let mut vtune = vtune::Folder::default();
+        let mut vsprof = vsprof::Folder::default();
 
         // Each Collapse impl gets its own flag in this array.
         // It gets set to true when the impl has been ruled out.
-        let mut not_applicable = [false; 4];
+        let mut not_applicable = [false; 5];
 
         let mut buffer = String::new();
         loop {
@@ -106,6 +107,7 @@ impl Collapse for Folder {
             try_collapse_impl!(dtrace, 1);
             try_collapse_impl!(sample, 2);
             try_collapse_impl!(vtune, 3);
+            try_collapse_impl!(vsprof, 4);
 
             if eof {
                 break;

src/collapse/mod.rs

@@ -35,6 +35,13 @@ pub mod sample;
 ///   [crate-level documentation]: ../../index.html
 pub mod vtune;
 
+/// Stack collapsing for the output of the [Visual Studio built-in profiler](https://docs.microsoft.com/en-us/visualstudio/profiling/profiling-feature-tour?view=vs-2019).
+///
+/// See the [crate-level documentation] for details.
+///
+///   [crate-level documentation]: ../../index.html
+pub mod vsprof;
+
 // DEFAULT_NTHREADS is public because we use it in the help text of the binaries,
 // but it doesn't need to be exposed to library users, hence #[doc(hidden)].
 #[doc(hidden)]