diff --git a/build.zig b/build.zig
index 8873db880ca772dd209fcb20bda1b0a4965498cf..f9598171bf647af457dd1d015df7749695051ea8 100644
--- a/build.zig
+++ b/build.zig
@@ -9,6 +9,7 @@ pub fn build(b: *std.Build) void {
     addTest(b, target, mode, mod, 0);
     addTest(b, target, mode, mod, 1);
     addTest(b, target, mode, mod, 2);
+    addTest(b, target, mode, mod, 3);
 }
 
 fn addTest(b: *std.Build, target: std.zig.CrossTarget, mode: std.builtin.Mode, mod: *std.build.Module, comptime backend: u8) void {
diff --git a/src/chrome.zig b/src/chrome.zig
index b134b778eecc19c326c4a976dc451a344578fad3..b8bd32b0e72228ca8d93e092c7b07fef18411288 100644
--- a/src/chrome.zig
+++ b/src/chrome.zig
@@ -22,7 +22,7 @@ pub fn deinit() void {
 pub fn init_thread() !void {
     tid = std.os.linux.gettid();
 
-    path = try std.fmt.allocPrint(alloc, "/data/trace.{d}.{d}.spall.json", .{ pid, tid });
+    path = try std.fmt.allocPrint(alloc, "/data/trace.{d}.{d}.chrome.json", .{ pid, tid });
     file = try std.fs.cwd().createFile(path, .{});
     buffered_writer = std.io.bufferedWriter(file.writer());
 
@@ -38,16 +38,19 @@ pub fn deinit_thread() void {
     log.debug("{s}", .{path});
 }
 
-pub inline fn trace_begin(ctx: tracer.Ctx) void {
+pub inline fn trace_begin(ctx: tracer.Ctx, comptime ifmt: []const u8, iargs: anytype) void {
     buffered_writer.writer().print(
-        \\{{"cat":"function", "name":"{s}:{d}:{d} ({s})", "ph": "B", "pid": {d}, "tid": {d}, "ts": {d}}},
-        \\
+        \\{{"cat":"function", "name":"{s}:{d}:{d} ({s})
+        ++ ifmt ++
+            \\", "ph": "B", "pid": {d}, "tid": {d}, "ts": {d}}},
+            \\
     ,
         .{
             if (ctx.src.file[0] == '/') ctx.src.file[trim_count..] else ctx.src.file,
             ctx.src.line,
             ctx.src.column,
             ctx.src.fn_name,
+        } ++ iargs ++ .{
             pid,
             tid,
             std.time.microTimestamp(),
diff --git a/src/main.zig b/src/main.zig
index c4b2c31c8d5bc19795f7b3c2f0d562bb9e330bdd..7c9ac56c20fbfc3b3350992db65e9653586deda4 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -6,6 +6,7 @@ pub const tracer_impl = switch (build_options.backend) {
     0 => tracer.none,
     1 => tracer.log,
     2 => tracer.spall,
+    3 => tracer.chrome,
     else => unreachable,
 };