From aa3cc3df9b788c3ce3a1547b8c8f63955f26b1a6 Mon Sep 17 00:00:00 2001
From: Simon Gellis <simongellis@gmail.com>
Date: Mon, 11 Aug 2025 19:55:55 -0400
Subject: [PATCH] Begin implementing profiling sessions

---
 Cargo.lock      | 953 +++++++++++++++++++++++++++++++++++++++++++++++-
 Cargo.toml      |   1 +
 src/emulator.rs |   4 +-
 src/profiler.rs | 103 +++++-
 4 files changed, 1055 insertions(+), 6 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index 459e426..c7315d3 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -34,6 +34,7 @@ version = "0.24.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "dfbe277e56a376000877090da837660b4427aad530e3028d44e0bffe4f89a1c1"
 dependencies = [
+ "fallible-iterator",
  "gimli",
 ]
 
@@ -66,6 +67,21 @@ dependencies = [
  "memchr",
 ]
 
+[[package]]
+name = "alloc-no-stdlib"
+version = "2.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cc7bb162ec39d46ab1ca8c77bf72e890535becd1751bb45f64c597edb4c8c6b3"
+
+[[package]]
+name = "alloc-stdlib"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "94fb8275041c72129eb51b7d0322c29b8387a0386127718b096429201a5d6ece"
+dependencies = [
+ "alloc-no-stdlib",
+]
+
 [[package]]
 name = "alsa"
 version = "0.9.1"
@@ -273,6 +289,21 @@ dependencies = [
  "pin-project-lite",
 ]
 
+[[package]]
+name = "async-compression"
+version = "0.4.27"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ddb939d66e4ae03cee6091612804ba446b12878410cfa17f785f4dd67d4014e8"
+dependencies = [
+ "brotli",
+ "flate2",
+ "futures-core",
+ "futures-io",
+ "memchr",
+ "pin-project-lite",
+ "tokio",
+]
+
 [[package]]
 name = "async-executor"
 version = "1.13.2"
@@ -453,6 +484,18 @@ dependencies = [
  "windows-targets 0.52.6",
 ]
 
+[[package]]
+name = "base64"
+version = "0.22.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "72b3254f16251a8381aa12e40e3c4d2f0199f8c6508fbecb9d91f575e0fbb8c6"
+
+[[package]]
+name = "binary-merge"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "597bb81c80a54b6a4381b23faba8d7774b144c94cbd1d6fe3f1329bd776554ab"
+
 [[package]]
 name = "bindgen"
 version = "0.72.0"
@@ -538,6 +581,27 @@ dependencies = [
  "piper",
 ]
 
+[[package]]
+name = "brotli"
+version = "8.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9991eea70ea4f293524138648e41ee89b0b2b12ddef3b255effa43c8056e0e0d"
+dependencies = [
+ "alloc-no-stdlib",
+ "alloc-stdlib",
+ "brotli-decompressor",
+]
+
+[[package]]
+name = "brotli-decompressor"
+version = "5.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "874bb8112abecc98cbd6d81ea4fa7e94fb9449648c93cc89aa40c81c24d7de03"
+dependencies = [
+ "alloc-no-stdlib",
+ "alloc-stdlib",
+]
+
 [[package]]
 name = "bumpalo"
 version = "3.19.0"
@@ -564,6 +628,12 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "byteorder"
+version = "1.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1fd0f2584146f6f2ef48085050886acf353beff7305ebd1ae69500e27c67f64b"
+
 [[package]]
 name = "byteorder-lite"
 version = "0.1.0"
@@ -576,6 +646,18 @@ version = "1.10.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d71b6127be86fdcfddb610f7182ac57211d4b18a3e9c82eb2d17662f2227ad6a"
 
+[[package]]
+name = "cab"
+version = "0.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "171228650e6721d5acc0868a462cd864f49ac5f64e4a42cde270406e64e404d2"
+dependencies = [
+ "byteorder",
+ "flate2",
+ "lzxd",
+ "time",
+]
+
 [[package]]
 name = "calloop"
 version = "0.13.0"
@@ -828,6 +910,30 @@ dependencies = [
  "windows 0.54.0",
 ]
 
+[[package]]
+name = "cpp_demangle"
+version = "0.4.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "96e58d342ad113c2b878f16d5d034c03be492ae460cdbc02b7f0f2284d310c7d"
+dependencies = [
+ "cfg-if",
+]
+
+[[package]]
+name = "crc"
+version = "3.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9710d3b3739c2e349eb44fe848ad0b7c8cb1e42bd87ee49371df2f7acaf3e675"
+dependencies = [
+ "crc-catalog",
+]
+
+[[package]]
+name = "crc-catalog"
+version = "2.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "19d374276b40fb8bbdee95aef7c7fa6b5316ec764510eb64b8dd0e2ed0d7e7f5"
+
 [[package]]
 name = "crc32fast"
 version = "1.5.0"
@@ -864,6 +970,24 @@ version = "0.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0c87e182de0887fd5361989c677c4e8f5000cd9491d6d563161a8f3a5519fc7f"
 
+[[package]]
+name = "debugid"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bef552e6f588e446098f6ba40d89ac146c8c7b64aade83c051ee00bb5d2bc18d"
+dependencies = [
+ "uuid",
+]
+
+[[package]]
+name = "deranged"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9c9e6a11ca8224451684bc0d7d5a7adbf8f2fd6887261a1cfc3c0432f9d4068e"
+dependencies = [
+ "powerfmt",
+]
+
 [[package]]
 name = "directories"
 version = "6.0.0"
@@ -873,6 +997,15 @@ dependencies = [
  "dirs-sys",
 ]
 
+[[package]]
+name = "dirs"
+version = "6.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c3e8aa94d75141228480295a7d0e7feb620b1a5ad9f12bc40be62411e38cce4e"
+dependencies = [
+ "dirs-sys",
+]
+
 [[package]]
 name = "dirs-sys"
 version = "0.5.0"
@@ -1052,6 +1185,15 @@ version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "55dd888a213fc57e957abf2aa305ee3e8a28dbe05687a251f33b637cd46b0070"
 
+[[package]]
+name = "elsa"
+version = "1.11.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9abf33c656a7256451ebb7d0082c5a471820c31269e49d807c538c252352186e"
+dependencies = [
+ "stable_deref_trait",
+]
+
 [[package]]
 name = "emath"
 version = "0.32.0"
@@ -1188,6 +1330,12 @@ dependencies = [
  "pin-project-lite",
 ]
 
+[[package]]
+name = "fallible-iterator"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2acce4a10f12dc2fb14a218589d4f1f62ef011b2d0cc4b3cb1bba8e94da14649"
+
 [[package]]
 name = "fastrand"
 version = "2.3.0"
@@ -1223,6 +1371,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4a3d7db9596fecd151c5f638c0ee5d5bd487b6e0ea232e5dc96d5250f6f94b1d"
 dependencies = [
  "crc32fast",
+ "libz-rs-sys",
  "miniz_oxide",
 ]
 
@@ -1274,6 +1423,16 @@ dependencies = [
  "percent-encoding",
 ]
 
+[[package]]
+name = "fs4"
+version = "0.13.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8640e34b88f7652208ce9e88b1a37a2ae95227d84abec377ccd3c5cfeb141ed4"
+dependencies = [
+ "rustix 1.0.8",
+ "windows-sys 0.59.0",
+]
+
 [[package]]
 name = "futures-channel"
 version = "0.3.31"
@@ -1319,6 +1478,12 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "futures-sink"
+version = "0.3.31"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e575fab7d1e0dcb8d0c7bcf9a63ee213816ab51902e6d244a95819acacf1d4f7"
+
 [[package]]
 name = "futures-task"
 version = "0.3.31"
@@ -1334,6 +1499,7 @@ dependencies = [
  "futures-core",
  "futures-io",
  "futures-macro",
+ "futures-sink",
  "futures-task",
  "memchr",
  "pin-project-lite",
@@ -1358,8 +1524,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "335ff9f135e4384c8150d6f27c6daed433577f86b4750418338c01a1a2528592"
 dependencies = [
  "cfg-if",
+ "js-sys",
  "libc",
  "wasi 0.11.1+wasi-snapshot-preview1",
+ "wasm-bindgen",
 ]
 
 [[package]]
@@ -1369,9 +1537,11 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "26145e563e54f2cadc477553f1ec5ee650b00862f0a58bcd12cbdc5f0ea2d2f4"
 dependencies = [
  "cfg-if",
+ "js-sys",
  "libc",
  "r-efi",
  "wasi 0.14.2+wasi-0.2.4",
+ "wasm-bindgen",
 ]
 
 [[package]]
@@ -1415,6 +1585,10 @@ name = "gimli"
 version = "0.31.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "07e28edb80900c19c28f1072f2e8aeca7fa06b23cd4169cefe1af5aa3260783f"
+dependencies = [
+ "fallible-iterator",
+ "stable_deref_trait",
+]
 
 [[package]]
 name = "gl_generator"
@@ -1549,6 +1723,106 @@ version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "dfa686283ad6dd069f105e5ab091b04c62850d3e4cf5d67debad1933f55023df"
 
+[[package]]
+name = "http"
+version = "1.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f4a85d31aea989eead29a3aaf9e1115a180df8282431156e533de47660892565"
+dependencies = [
+ "bytes",
+ "fnv",
+ "itoa",
+]
+
+[[package]]
+name = "http-body"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1efedce1fb8e6913f23e0c92de8e62cd5b772a67e7b3946df930a62566c93184"
+dependencies = [
+ "bytes",
+ "http",
+]
+
+[[package]]
+name = "http-body-util"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b021d93e26becf5dc7e1b75b1bed1fd93124b374ceb73f43d4d4eafec896a64a"
+dependencies = [
+ "bytes",
+ "futures-core",
+ "http",
+ "http-body",
+ "pin-project-lite",
+]
+
+[[package]]
+name = "httparse"
+version = "1.10.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6dbf3de79e51f3d586ab4cb9d5c3e2c14aa28ed23d180cf89b4df0454a69cc87"
+
+[[package]]
+name = "hyper"
+version = "1.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cc2b571658e38e0c01b1fdca3bbbe93c00d3d71693ff2770043f8c29bc7d6f80"
+dependencies = [
+ "bytes",
+ "futures-channel",
+ "futures-util",
+ "http",
+ "http-body",
+ "httparse",
+ "itoa",
+ "pin-project-lite",
+ "smallvec",
+ "tokio",
+ "want",
+]
+
+[[package]]
+name = "hyper-rustls"
+version = "0.27.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e3c93eb611681b207e1fe55d5a71ecf91572ec8a6705cdb6857f7d8d5242cf58"
+dependencies = [
+ "http",
+ "hyper",
+ "hyper-util",
+ "rustls",
+ "rustls-pki-types",
+ "tokio",
+ "tokio-rustls",
+ "tower-service",
+ "webpki-roots",
+]
+
+[[package]]
+name = "hyper-util"
+version = "0.1.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8d9b05277c7e8da2c93a568989bb6207bef0112e8d17df7a6eda4a3cf143bc5e"
+dependencies = [
+ "base64",
+ "bytes",
+ "futures-channel",
+ "futures-core",
+ "futures-util",
+ "http",
+ "http-body",
+ "hyper",
+ "ipnet",
+ "libc",
+ "percent-encoding",
+ "pin-project-lite",
+ "socket2 0.6.0",
+ "tokio",
+ "tower-service",
+ "tracing",
+]
+
 [[package]]
 name = "icu_collections"
 version = "2.0.0"
@@ -1699,6 +1973,15 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "inplace-vec-builder"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cf64c2edc8226891a71f127587a2861b132d2b942310843814d5001d99a1d307"
+dependencies = [
+ "smallvec",
+]
+
 [[package]]
 name = "io-kit-sys"
 version = "0.4.1"
@@ -1720,6 +2003,22 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "ipnet"
+version = "2.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "469fb0b9cefa57e3ef31275ee7cacb78f2fdca44e4765491884a2b119d4eb130"
+
+[[package]]
+name = "iri-string"
+version = "0.7.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dbc5ebe9c3a1a7a5127f920a418f7585e9e758e911d0466ed004f393b0e380b2"
+dependencies = [
+ "memchr",
+ "serde",
+]
+
 [[package]]
 name = "is_terminal_polyfill"
 version = "1.70.1"
@@ -1860,6 +2159,7 @@ dependencies = [
  "tracing",
  "tracing-subscriber",
  "wgpu",
+ "wholesym",
  "windows 0.61.3",
  "winit",
  "winresource",
@@ -1908,6 +2208,48 @@ dependencies = [
  "pkg-config",
 ]
 
+[[package]]
+name = "libz-rs-sys"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "172a788537a2221661b480fee8dc5f96c580eb34fa88764d3205dc356c7e4221"
+dependencies = [
+ "zlib-rs",
+]
+
+[[package]]
+name = "linear-map"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bfae20f6b19ad527b550c223fddc3077a547fc70cda94b9b566575423fd303ee"
+
+[[package]]
+name = "linux-perf-data"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1f85f35725e15ad6c62b9db73f3d62439094e616a2f83500f7bcdc01ae5b84d8"
+dependencies = [
+ "byteorder",
+ "linear-map",
+ "linux-perf-event-reader",
+ "memchr",
+ "prost",
+ "prost-derive",
+ "thiserror 2.0.12",
+]
+
+[[package]]
+name = "linux-perf-event-reader"
+version = "0.10.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "aa8fc7e83909ea3b9e2784591655637d3401f2f16014f9d8d6e23ccd138e665f"
+dependencies = [
+ "bitflags 2.9.1",
+ "byteorder",
+ "memchr",
+ "thiserror 2.0.12",
+]
+
 [[package]]
 name = "linux-raw-sys"
 version = "0.4.15"
@@ -1948,6 +2290,28 @@ version = "0.4.27"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "13dc2df351e3202783a1fe0d44375f7295ffb4049267b0f3018346dc122a1d94"
 
+[[package]]
+name = "lru-slab"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "112b39cec0b298b6c1999fee3e31427f74f676e4cb9879ed1a121b43661a4154"
+
+[[package]]
+name = "lzma-rs"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "297e814c836ae64db86b36cf2a557ba54368d03f6afcd7d947c266692f71115e"
+dependencies = [
+ "byteorder",
+ "crc",
+]
+
+[[package]]
+name = "lzxd"
+version = "0.2.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7b29dffab797218e12e4df08ef5d15ab9efca2504038b1b32b9b32fc844b39c9"
+
 [[package]]
 name = "mach2"
 version = "0.4.3"
@@ -1957,6 +2321,17 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "macho-unwind-info"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bb4bdc8b0ce69932332cf76d24af69c3a155242af95c226b2ab6c2e371ed1149"
+dependencies = [
+ "thiserror 2.0.12",
+ "zerocopy",
+ "zerocopy-derive",
+]
+
 [[package]]
 name = "malloc_buf"
 version = "0.0.6"
@@ -1975,6 +2350,12 @@ dependencies = [
  "regex-automata 0.1.10",
 ]
 
+[[package]]
+name = "maybe-owned"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4facc753ae494aeb6e3c22f839b158aebd4f9270f55cd3c79906c45476c47ab4"
+
 [[package]]
 name = "memchr"
 version = "2.7.5"
@@ -2059,6 +2440,16 @@ dependencies = [
  "windows-sys 0.59.0",
 ]
 
+[[package]]
+name = "msvc-demangler"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fbeff6bd154a309b2ada5639b2661ca6ae4599b34e8487dc276d2cd637da2d76"
+dependencies = [
+ "bitflags 2.9.1",
+ "itoa",
+]
+
 [[package]]
 name = "naga"
 version = "25.0.1"
@@ -2197,6 +2588,12 @@ dependencies = [
  "num-traits",
 ]
 
+[[package]]
+name = "num-conv"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "51d515d32fb182ee37cda2ccdcb92950d6a3c2893aa280e540671c2cd0f3b1d9"
+
 [[package]]
 name = "num-derive"
 version = "0.4.2"
@@ -2535,7 +2932,9 @@ version = "0.36.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "62948e14d923ea95ea2c7c86c71013138b66525b86bdc08d2dcc262bdb497b87"
 dependencies = [
+ "flate2",
  "memchr",
+ "ruzstd",
 ]
 
 [[package]]
@@ -2663,6 +3062,31 @@ version = "1.0.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "57c0d7b74b563b49d38dae00a0c37d4d6de9b432382b2892f0574ddcae73fd0a"
 
+[[package]]
+name = "pdb-addr2line"
+version = "0.11.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b2a2e496e34cd96a1bb26f681e5adb11c98f1e5378e294e60c06c0cf04c526ba"
+dependencies = [
+ "bitflags 2.9.1",
+ "elsa",
+ "maybe-owned",
+ "pdb2",
+ "range-collections",
+ "thiserror 2.0.12",
+]
+
+[[package]]
+name = "pdb2"
+version = "0.9.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "266b8733697ccc3aa405a9b2cf485a42746ad1cf73d3b0497b79b24f9e874a71"
+dependencies = [
+ "fallible-iterator",
+ "scroll",
+ "uuid",
+]
+
 [[package]]
 name = "percent-encoding"
 version = "2.3.1"
@@ -2810,6 +3234,12 @@ dependencies = [
  "zerovec",
 ]
 
+[[package]]
+name = "powerfmt"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "439ee305def115ba05938db6eb1644ff94165c5ab5e9420d1c1bcedbba909391"
+
 [[package]]
 name = "ppv-lite86"
 version = "0.2.21"
@@ -2858,6 +3288,28 @@ version = "1.0.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3eb8486b569e12e2c32ad3e204dbaba5e4b5b216e9367044f25f1dba42341773"
 
+[[package]]
+name = "prost"
+version = "0.13.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2796faa41db3ec313a31f7624d9286acf277b52de526150b7e69f3debf891ee5"
+dependencies = [
+ "bytes",
+]
+
+[[package]]
+name = "prost-derive"
+version = "0.13.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8a56d757972c98b346a9b766e3f02746cde6dd1cd1d1d563472929fdd74bec4d"
+dependencies = [
+ "anyhow",
+ "itertools 0.14.0",
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "quick-xml"
 version = "0.37.5"
@@ -2867,6 +3319,61 @@ dependencies = [
  "memchr",
 ]
 
+[[package]]
+name = "quinn"
+version = "0.11.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "626214629cda6781b6dc1d316ba307189c85ba657213ce642d9c77670f8202c8"
+dependencies = [
+ "bytes",
+ "cfg_aliases",
+ "pin-project-lite",
+ "quinn-proto",
+ "quinn-udp",
+ "rustc-hash 2.1.1",
+ "rustls",
+ "socket2 0.5.10",
+ "thiserror 2.0.12",
+ "tokio",
+ "tracing",
+ "web-time",
+]
+
+[[package]]
+name = "quinn-proto"
+version = "0.11.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "49df843a9161c85bb8aae55f101bc0bac8bcafd637a620d9122fd7e0b2f7422e"
+dependencies = [
+ "bytes",
+ "getrandom 0.3.3",
+ "lru-slab",
+ "rand 0.9.2",
+ "ring",
+ "rustc-hash 2.1.1",
+ "rustls",
+ "rustls-pki-types",
+ "slab",
+ "thiserror 2.0.12",
+ "tinyvec",
+ "tracing",
+ "web-time",
+]
+
+[[package]]
+name = "quinn-udp"
+version = "0.5.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fcebb1209ee276352ef14ff8732e24cc2b02bbac986cd74a4c81bcb2f9881970"
+dependencies = [
+ "cfg_aliases",
+ "libc",
+ "once_cell",
+ "socket2 0.5.10",
+ "tracing",
+ "windows-sys 0.59.0",
+]
+
 [[package]]
 name = "quote"
 version = "1.0.40"
@@ -2932,6 +3439,24 @@ version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c3d6831663a5098ea164f89cff59c6284e95f4e3c76ce9848d4529f5ccca9bde"
 
+[[package]]
+name = "range-collections"
+version = "0.4.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "861706ea9c4aded7584c5cd1d241cec2ea7f5f50999f236c22b65409a1f1a0d0"
+dependencies = [
+ "binary-merge",
+ "inplace-vec-builder",
+ "ref-cast",
+ "smallvec",
+]
+
+[[package]]
+name = "rangemap"
+version = "1.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f93e7e49bb0bf967717f7bd674458b3d6b0c5f48ec7e3038166026a69fc22223"
+
 [[package]]
 name = "raw-window-handle"
 version = "0.6.2"
@@ -2976,6 +3501,26 @@ dependencies = [
  "thiserror 2.0.12",
 ]
 
+[[package]]
+name = "ref-cast"
+version = "1.0.24"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4a0ae411dbe946a674d89546582cea4ba2bb8defac896622d6496f14c23ba5cf"
+dependencies = [
+ "ref-cast-impl",
+]
+
+[[package]]
+name = "ref-cast-impl"
+version = "1.0.24"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1165225c21bff1f3bbce98f5a1f889949bc902d3575308cc7b0de30b4f6d27c7"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "regex"
 version = "1.11.1"
@@ -3026,6 +3571,48 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "19b30a45b0cd0bcca8037f3d0dc3421eaf95327a17cad11964fb8179b4fc4832"
 
+[[package]]
+name = "reqwest"
+version = "0.12.22"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cbc931937e6ca3a06e3b6c0aa7841849b160a90351d6ab467a8b9b9959767531"
+dependencies = [
+ "async-compression",
+ "base64",
+ "bytes",
+ "futures-core",
+ "futures-util",
+ "http",
+ "http-body",
+ "http-body-util",
+ "hyper",
+ "hyper-rustls",
+ "hyper-util",
+ "js-sys",
+ "log",
+ "percent-encoding",
+ "pin-project-lite",
+ "quinn",
+ "rustls",
+ "rustls-pki-types",
+ "serde",
+ "serde_json",
+ "serde_urlencoded",
+ "sync_wrapper",
+ "tokio",
+ "tokio-rustls",
+ "tokio-util",
+ "tower",
+ "tower-http",
+ "tower-service",
+ "url",
+ "wasm-bindgen",
+ "wasm-bindgen-futures",
+ "wasm-streams",
+ "web-sys",
+ "webpki-roots",
+]
+
 [[package]]
 name = "rfd"
 version = "0.15.4"
@@ -3050,6 +3637,20 @@ dependencies = [
  "windows-sys 0.59.0",
 ]
 
+[[package]]
+name = "ring"
+version = "0.17.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a4689e6c2294d81e88dc6261c768b63bc4fcdb852be6d1352498b114f61383b7"
+dependencies = [
+ "cc",
+ "cfg-if",
+ "getrandom 0.2.16",
+ "libc",
+ "untrusted",
+ "windows-sys 0.52.0",
+]
+
 [[package]]
 name = "rtrb"
 version = "0.3.2"
@@ -3126,12 +3727,56 @@ dependencies = [
  "windows-sys 0.60.2",
 ]
 
+[[package]]
+name = "rustls"
+version = "0.23.31"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c0ebcbd2f03de0fc1122ad9bb24b127a5a6cd51d72604a3f3c50ac459762b6cc"
+dependencies = [
+ "once_cell",
+ "ring",
+ "rustls-pki-types",
+ "rustls-webpki",
+ "subtle",
+ "zeroize",
+]
+
+[[package]]
+name = "rustls-pki-types"
+version = "1.12.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "229a4a4c221013e7e1f1a043678c5cc39fe5171437c88fb47151a21e6f5b5c79"
+dependencies = [
+ "web-time",
+ "zeroize",
+]
+
+[[package]]
+name = "rustls-webpki"
+version = "0.103.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0a17884ae0c1b773f1ccd2bd4a8c72f16da897310a98b0e84bf349ad5ead92fc"
+dependencies = [
+ "ring",
+ "rustls-pki-types",
+ "untrusted",
+]
+
 [[package]]
 name = "rustversion"
 version = "1.0.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8a0d197bd2c9dc6e53b84da9556a69ba4cdfab8619eb41a8bd1cc2027a0f6b1d"
 
+[[package]]
+name = "ruzstd"
+version = "0.7.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fad02996bfc73da3e301efe90b1837be9ed8f4a462b6ed410aa35d00381de89f"
+dependencies = [
+ "twox-hash",
+]
+
 [[package]]
 name = "ryu"
 version = "1.0.20"
@@ -3147,6 +3792,46 @@ dependencies = [
  "winapi-util",
 ]
 
+[[package]]
+name = "samply-symbols"
+version = "0.24.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "97e73d38bb04a373dba1260af91d4b0010e84cecd92d20b8e9949a910d5b9cbb"
+dependencies = [
+ "addr2line",
+ "bitflags 2.9.1",
+ "cpp_demangle",
+ "crc32fast",
+ "debugid",
+ "elsa",
+ "flate2",
+ "gimli",
+ "linux-perf-data",
+ "lzma-rs",
+ "macho-unwind-info",
+ "memchr",
+ "msvc-demangler",
+ "nom",
+ "object",
+ "pdb-addr2line",
+ "rangemap",
+ "rustc-demangle",
+ "scala-native-demangle",
+ "srcsrv",
+ "thiserror 2.0.12",
+ "uuid",
+ "yoke",
+ "yoke-derive",
+ "zerocopy",
+ "zerocopy-derive",
+]
+
+[[package]]
+name = "scala-native-demangle"
+version = "0.0.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0a4416eddc0eaf31e04aa4039bd3db4288ea1ba613955d86cf9c310049c5d1e2"
+
 [[package]]
 name = "scoped-tls"
 version = "1.0.1"
@@ -3159,6 +3844,12 @@ version = "1.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "94143f37725109f92c262ed2cf5e59bce7498c01bcc1502d7b9afe439a4e9f49"
 
+[[package]]
+name = "scroll"
+version = "0.12.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6ab8598aa408498679922eff7fa985c25d58a90771bd6be794434c5277eab1a6"
+
 [[package]]
 name = "sctk-adwaita"
 version = "0.10.1"
@@ -3224,6 +3915,18 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "serde_urlencoded"
+version = "0.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d3491c14715ca2294c4d6a88f15e84739788c1d030eed8c110436aafdaa2f3fd"
+dependencies = [
+ "form_urlencoded",
+ "itoa",
+ "ryu",
+ "serde",
+]
+
 [[package]]
 name = "sharded-slab"
 version = "0.1.7"
@@ -3326,6 +4029,16 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "socket2"
+version = "0.5.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e22376abed350d73dd1cd119b57ffccad95b4e585a7cda43e286245ce23c0678"
+dependencies = [
+ "libc",
+ "windows-sys 0.52.0",
+]
+
 [[package]]
 name = "socket2"
 version = "0.6.0"
@@ -3345,6 +4058,16 @@ dependencies = [
  "bitflags 2.9.1",
 ]
 
+[[package]]
+name = "srcsrv"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "85cd3e3828fb4dd5ba0e7091777edb6c3db3cd2d6fc10547b29b40f6949a29be"
+dependencies = [
+ "memchr",
+ "thiserror 2.0.12",
+]
+
 [[package]]
 name = "stable_deref_trait"
 version = "1.2.0"
@@ -3397,6 +4120,30 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "subtle"
+version = "2.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "13c2bddecc57b384dee18652358fb23172facb8a2c51ccc10d74c157bdea3292"
+
+[[package]]
+name = "symsrv"
+version = "0.5.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b4c73f1f7b9bc1423e6b5c6b4ed3840f266f8291b270520c0fb0501bad3a0aa7"
+dependencies = [
+ "async-compression",
+ "cab",
+ "dirs",
+ "fs4",
+ "futures-util",
+ "http",
+ "reqwest",
+ "scopeguard",
+ "thiserror 2.0.12",
+ "tokio",
+]
+
 [[package]]
 name = "syn"
 version = "2.0.104"
@@ -3408,6 +4155,15 @@ dependencies = [
  "unicode-ident",
 ]
 
+[[package]]
+name = "sync_wrapper"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0bf256ce5efdfa370213c1dabab5935a12e49f2c58d15e9eac2870d3b4f27263"
+dependencies = [
+ "futures-core",
+]
+
 [[package]]
 name = "synstructure"
 version = "0.13.2"
@@ -3515,6 +4271,25 @@ dependencies = [
  "weezl",
 ]
 
+[[package]]
+name = "time"
+version = "0.3.41"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8a7619e19bc266e0f9c5e6686659d394bc57973859340060a69221e57dbc0c40"
+dependencies = [
+ "deranged",
+ "num-conv",
+ "powerfmt",
+ "serde",
+ "time-core",
+]
+
+[[package]]
+name = "time-core"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c9e9a38711f559d9e3ce1cdb06dd7c5b8ea546bc90052da6d06bb76da74bb07c"
+
 [[package]]
 name = "tiny-skia"
 version = "0.11.4"
@@ -3550,6 +4325,21 @@ dependencies = [
  "zerovec",
 ]
 
+[[package]]
+name = "tinyvec"
+version = "1.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "09b3661f17e86524eccd4371ab0429194e0d7c008abb45f7a7495b1719463c71"
+dependencies = [
+ "tinyvec_macros",
+]
+
+[[package]]
+name = "tinyvec_macros"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1f3ccbac311fea05f86f61904b462b55fb3df8837a366dfc601a0161d0532f20"
+
 [[package]]
 name = "tokio"
 version = "1.47.1"
@@ -3563,7 +4353,7 @@ dependencies = [
  "mio",
  "pin-project-lite",
  "slab",
- "socket2",
+ "socket2 0.6.0",
  "tokio-macros",
  "windows-sys 0.59.0",
 ]
@@ -3579,6 +4369,29 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "tokio-rustls"
+version = "0.26.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8e727b36a1a0e8b74c376ac2211e40c2c8af09fb4013c60d910495810f008e9b"
+dependencies = [
+ "rustls",
+ "tokio",
+]
+
+[[package]]
+name = "tokio-util"
+version = "0.7.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "14307c986784f72ef81c89db7d9e28d6ac26d16213b109ea501696195e6e3ce5"
+dependencies = [
+ "bytes",
+ "futures-core",
+ "futures-sink",
+ "pin-project-lite",
+ "tokio",
+]
+
 [[package]]
 name = "toml"
 version = "0.8.23"
@@ -3620,6 +4433,51 @@ version = "0.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5d99f8c9a7727884afe522e9bd5edbfc91a3312b36a77b5fb8926e4c31a41801"
 
+[[package]]
+name = "tower"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d039ad9159c98b70ecfd540b2573b97f7f52c3e8d9f8ad57a24b916a536975f9"
+dependencies = [
+ "futures-core",
+ "futures-util",
+ "pin-project-lite",
+ "sync_wrapper",
+ "tokio",
+ "tower-layer",
+ "tower-service",
+]
+
+[[package]]
+name = "tower-http"
+version = "0.6.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "adc82fd73de2a9722ac5da747f12383d2bfdb93591ee6c58486e0097890f05f2"
+dependencies = [
+ "bitflags 2.9.1",
+ "bytes",
+ "futures-util",
+ "http",
+ "http-body",
+ "iri-string",
+ "pin-project-lite",
+ "tower",
+ "tower-layer",
+ "tower-service",
+]
+
+[[package]]
+name = "tower-layer"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "121c2a6cda46980bb0fcd1647ffaf6cd3fc79a013de288782836f6df9c48780e"
+
+[[package]]
+name = "tower-service"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8df9b6e13f2d32c91b9bd719c00d1958837bc7dec474d94952798cc8e69eeec3"
+
 [[package]]
 name = "tracing"
 version = "0.1.41"
@@ -3691,12 +4549,28 @@ dependencies = [
  "strength_reduce",
 ]
 
+[[package]]
+name = "try-lock"
+version = "0.2.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e421abadd41a4225275504ea4d6566923418b7f05506fbc9c0fe86ba7396114b"
+
 [[package]]
 name = "ttf-parser"
 version = "0.25.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d2df906b07856748fa3f6e0ad0cbaa047052d4a7dd609e231c4f72cee8c36f31"
 
+[[package]]
+name = "twox-hash"
+version = "1.6.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "97fee6b57c6a41524a810daee9286c02d7752c4253064d0b05472833a438f675"
+dependencies = [
+ "cfg-if",
+ "static_assertions",
+]
+
 [[package]]
 name = "type-map"
 version = "0.5.1"
@@ -3747,6 +4621,12 @@ version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4a1a07cc7db3810833284e8d372ccdc6da29741639ecc70c9ec107df0fa6154c"
 
+[[package]]
+name = "untrusted"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8ecb6da28b8a351d773b68d5825ac39017e680750f980f3a1a85cd8dd28a47c1"
+
 [[package]]
 name = "url"
 version = "2.5.4"
@@ -3815,6 +4695,15 @@ dependencies = [
  "winapi-util",
 ]
 
+[[package]]
+name = "want"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bfa7760aed19e106de2c7c0b581b509f2f25d3dacaf737cb82ac61bc6d760b0e"
+dependencies = [
+ "try-lock",
+]
+
 [[package]]
 name = "wasi"
 version = "0.11.1+wasi-snapshot-preview1"
@@ -3901,6 +4790,19 @@ dependencies = [
  "unicode-ident",
 ]
 
+[[package]]
+name = "wasm-streams"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "15053d8d85c7eccdbefef60f06769760a563c7f0a9d6902a13d35c7800b0ad65"
+dependencies = [
+ "futures-util",
+ "js-sys",
+ "wasm-bindgen",
+ "wasm-bindgen-futures",
+ "web-sys",
+]
+
 [[package]]
 name = "wayland-backend"
 version = "0.3.11"
@@ -4046,6 +4948,15 @@ dependencies = [
  "web-sys",
 ]
 
+[[package]]
+name = "webpki-roots"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7e8983c3ab33d6fb807cfcdad2491c4ea8cbc8ed839181c7dfd9c67c83e261b2"
+dependencies = [
+ "rustls-pki-types",
+]
+
 [[package]]
 name = "weezl"
 version = "0.1.10"
@@ -4199,6 +5110,34 @@ dependencies = [
  "web-sys",
 ]
 
+[[package]]
+name = "wholesym"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7ea291707798a4b15f75d46418b6f7c5a044cce8d55e2f18584ccebcdb8b4354"
+dependencies = [
+ "async-compression",
+ "bytes",
+ "core-foundation 0.10.1",
+ "core-foundation-sys",
+ "debugid",
+ "flate2",
+ "fs4",
+ "futures-util",
+ "http",
+ "libc",
+ "memmap2",
+ "reqwest",
+ "samply-symbols",
+ "scopeguard",
+ "symsrv",
+ "thiserror 2.0.12",
+ "tokio",
+ "uuid",
+ "yoke",
+ "yoke-derive",
+]
+
 [[package]]
 name = "winapi"
 version = "0.3.9"
@@ -5012,6 +5951,12 @@ dependencies = [
  "synstructure",
 ]
 
+[[package]]
+name = "zeroize"
+version = "1.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ced3678a2879b30306d323f4542626697a464a97c0a07c9aebf7ebca65cd4dde"
+
 [[package]]
 name = "zerotrie"
 version = "0.2.2"
@@ -5045,6 +5990,12 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "zlib-rs"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "626bd9fa9734751fc50d6060752170984d7053f5a39061f524cda68023d4db8a"
+
 [[package]]
 name = "zvariant"
 version = "5.6.0"
diff --git a/Cargo.toml b/Cargo.toml
index 9669059..2909eac 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -42,6 +42,7 @@ tokio = { version = "1", features = ["io-util", "macros", "net", "rt", "sync", "
 tracing = { version = "0.1", features = ["release_max_level_info"] }
 tracing-subscriber = { version = "0.3", features = ["env-filter"] }
 wgpu = "25"
+wholesym = "0.8"
 winit = { version = "0.30", features = ["serde"] }
 
 [target.'cfg(windows)'.dependencies]
diff --git a/src/emulator.rs b/src/emulator.rs
index af44efa..25b1a9e 100644
--- a/src/emulator.rs
+++ b/src/emulator.rs
@@ -18,12 +18,12 @@ use tracing::{error, warn};
 
 use crate::{
     audio::Audio,
-    emulator::{cart::Cart, shrooms_vb_core::SimEvent},
+    emulator::cart::Cart,
     graphics::TextureSink,
     memory::{MemoryRange, MemoryRegion},
 };
 use shrooms_vb_core::{EXPECTED_FRAME_SIZE, Sim, StopReason};
-pub use shrooms_vb_core::{VBKey, VBRegister, VBWatchpointType};
+pub use shrooms_vb_core::{SimEvent, VBKey, VBRegister, VBWatchpointType};
 
 mod address_set;
 mod cart;
diff --git a/src/profiler.rs b/src/profiler.rs
index 6004f44..20195a8 100644
--- a/src/profiler.rs
+++ b/src/profiler.rs
@@ -1,4 +1,6 @@
 use std::{
+    collections::HashMap,
+    path::PathBuf,
     sync::{
         Arc,
         atomic::{AtomicBool, Ordering},
@@ -7,8 +9,9 @@ use std::{
 };
 
 use tokio::{select, sync::mpsc};
+use wholesym::{SymbolManager, SymbolMap};
 
-use crate::emulator::{EmulatorClient, EmulatorCommand, ProfileEvent, SimId};
+use crate::emulator::{EmulatorClient, EmulatorCommand, ProfileEvent, SimEvent, SimId};
 
 pub struct Profiler {
     sim_id: SimId,
@@ -65,15 +68,109 @@ async fn run_profile(sim_id: SimId, client: EmulatorClient, running: Arc<AtomicB
     client.send_command(EmulatorCommand::StartProfiling(sim_id, profile_sync));
 
     running.store(true, Ordering::Relaxed);
+
+    let mut session = None;
     while let Some(event) = profile_source.recv().await {
         match event {
             ProfileEvent::Start { file_path } => {
-                println!("profiling {}", file_path.display());
+                session = Some(ProfileSession::new(file_path).await);
             }
             ProfileEvent::Update { cycles, event } => {
-                println!("update {cycles} {event:#x?}");
+                if let Some(session) = &mut session {
+                    session.track_elapsed_cycles(cycles);
+                    if let Some(event) = event {
+                        session.track_event(event);
+                    }
+                }
             }
         }
     }
     running.store(false, Ordering::Release);
 }
+
+struct ProfileSession {
+    symbol_map: SymbolMap,
+    call_stacks: HashMap<u16, Vec<StackFrame>>,
+    context_stack: Vec<u16>,
+}
+
+struct StackFrame {
+    #[expect(dead_code)]
+    address: Option<u32>,
+    cycles: u64,
+}
+
+impl ProfileSession {
+    async fn new(file_path: PathBuf) -> Self {
+        let symbol_manager = SymbolManager::with_config(Default::default());
+        let symbol_map = symbol_manager
+            .load_symbol_map_for_binary_at_path(&file_path, None)
+            .await
+            .expect("cannae load symbols");
+        let mut call_stacks = HashMap::new();
+        call_stacks.insert(
+            0,
+            vec![StackFrame {
+                address: None,
+                cycles: 0,
+            }],
+        );
+        Self {
+            symbol_map,
+            call_stacks,
+            context_stack: vec![],
+        }
+    }
+
+    fn track_elapsed_cycles(&mut self, cycles: u32) {
+        let code = self.context_stack.last().copied().unwrap_or(0);
+        let Some(stack) = self.call_stacks.get_mut(&code) else {
+            panic!("missing stack {code:04x}");
+        };
+        for frame in stack {
+            frame.cycles += cycles as u64;
+        }
+    }
+
+    fn track_event(&mut self, event: SimEvent) {
+        match event {
+            SimEvent::Interrupt(code) => {
+                self.context_stack.push(code);
+                if self.call_stacks.insert(code, vec![]).is_some() {
+                    panic!("{code:04x} fired twice");
+                }
+            }
+            SimEvent::Reti => {
+                let Some(code) = self.context_stack.pop() else {
+                    panic!("reti when not in interrupt");
+                };
+                if self.call_stacks.remove(&code).is_none() {
+                    panic!("{code:04x} popped but never called")
+                }
+            }
+            SimEvent::Call(addr) => {
+                let code = self.context_stack.last().copied().unwrap_or(0);
+                let Some(stack) = self.call_stacks.get_mut(&code) else {
+                    panic!("missing stack {code:04x}");
+                };
+                let name = self
+                    .symbol_map
+                    .lookup_sync(wholesym::LookupAddress::Svma(addr as u64));
+                println!("depth {}: {:?}", stack.len(), name);
+                stack.push(StackFrame {
+                    address: Some(addr),
+                    cycles: 0,
+                });
+            }
+            SimEvent::Return => {
+                let code = self.context_stack.last().copied().unwrap_or(0);
+                let Some(stack) = self.call_stacks.get_mut(&code) else {
+                    panic!("missing stack {code:04x}");
+                };
+                if stack.pop().is_none() {
+                    panic!("returned from {code:04x} but stack was empty");
+                }
+            }
+        }
+    }
+}