Support reading VBX files in cart

Cargo.toml

@@ -21,7 +21,6 @@ egui_extras = { version = "0.32", features = ["image"] }
 egui-notify = "0.20"
 egui-winit = "0.32"
 egui-wgpu = { version = "0.32", features = ["winit"] }
-elf = "0.8"
 fixed = { version = "1.28", features = ["num-traits"] }
 gilrs = { version = "0.11", features = ["serde-serialize"] }
 hex = "0.4"
@@ -37,13 +36,14 @@ rtrb = "0.3"
 rubato = "0.16"
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
+sha2 = "0.10"
 thread-priority = "2"
 tokio = { version = "1", features = ["io-util", "macros", "net", "rt", "sync", "time"] }
 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"] }
+zip = "4"
 
 [target.'cfg(windows)'.dependencies]
 windows = { version = "0.61", features = ["Win32_System_Threading"] }

build.rs

@@ -23,9 +23,7 @@ fn main() -> Result<(), Box<dyn Error>> {
         .define("VB_LITTLE_ENDIAN", None)
         .define("VB_SIGNED_PROPAGATE", None)
         .define("VB_DIV_GENERIC", None)
-        .define("VB_DIRECT_EXCEPTION", "on_exception")
         .define("VB_DIRECT_EXECUTE", "on_execute")
-        .define("VB_DIRECT_FETCH", "on_fetch")
         .define("VB_DIRECT_FRAME", "on_frame")
         .define("VB_DIRECT_READ", "on_read")
         .define("VB_DIRECT_WRITE", "on_write")

src/app.rs

@@ -24,8 +24,8 @@ use crate::{
     persistence::Persistence,
     window::{
         AboutWindow, AppWindow, BgMapWindow, CharacterDataWindow, FrameBufferWindow, GameWindow,
-        GdbServerWindow, HotkeysWindow, InputWindow, ObjectWindow, ProfileWindow, RegisterWindow,
-        TerminalWindow, WorldWindow,
+        GdbServerWindow, HotkeysWindow, InputWindow, ObjectWindow, RegisterWindow, TerminalWindow,
+        WorldWindow,
     },
 };
 
@@ -54,7 +54,6 @@ pub struct Application {
     viewports: HashMap<ViewportId, Viewport>,
     focused: Option<ViewportId>,
     init_debug_port: Option<u16>,
-    init_profiling: bool,
 }
 
 impl Application {
@@ -62,7 +61,6 @@ impl Application {
         client: EmulatorClient,
         proxy: EventLoopProxy<UserEvent>,
         debug_port: Option<u16>,
-        profiling: bool,
     ) -> Self {
         let wgpu = WgpuState::new();
         let icon = load_icon().ok().map(Arc::new);
@@ -91,7 +89,6 @@ impl Application {
             viewports: HashMap::new(),
             focused: None,
             init_debug_port: debug_port,
-            init_profiling: profiling,
         }
     }
 
@@ -116,11 +113,6 @@ impl ApplicationHandler<UserEvent> for Application {
             server.launch(port);
             self.open(event_loop, Box::new(server));
         }
-        if self.init_profiling {
-            let mut profiler = ProfileWindow::new(SimId::Player1, self.client.clone());
-            profiler.launch();
-            self.open(event_loop, Box::new(profiler));
-        }
         let app = GameWindow::new(
             self.client.clone(),
             self.proxy.clone(),
@@ -256,10 +248,6 @@ impl ApplicationHandler<UserEvent> for Application {
                 let terminal = TerminalWindow::new(sim_id, &self.client);
                 self.open(event_loop, Box::new(terminal));
             }
-            UserEvent::OpenProfiler(sim_id) => {
-                let profile = ProfileWindow::new(sim_id, self.client.clone());
-                self.open(event_loop, Box::new(profile));
-            }
             UserEvent::OpenDebugger(sim_id) => {
                 let debugger =
                     GdbServerWindow::new(sim_id, self.client.clone(), self.proxy.clone());
@@ -534,7 +522,6 @@ pub enum UserEvent {
     OpenFrameBuffers(SimId),
     OpenRegisters(SimId),
     OpenTerminal(SimId),
-    OpenProfiler(SimId),
     OpenDebugger(SimId),
     OpenInput,
     OpenHotkeys,

src/emulator.rs

@@ -23,7 +23,7 @@ use crate::{
     memory::{MemoryRange, MemoryRegion},
 };
 use shrooms_vb_core::{EXPECTED_FRAME_SIZE, Sim, StopReason};
-pub use shrooms_vb_core::{SimEvent, VBKey, VBRegister, VBWatchpointType};
+pub use shrooms_vb_core::{VBKey, VBRegister, VBWatchpointType};
 
 mod address_set;
 mod cart;
@@ -137,7 +137,6 @@ pub struct Emulator {
     state: Arc<Atomic<EmulatorState>>,
     audio_on: Arc<[AtomicBool; 2]>,
     linked: Arc<AtomicBool>,
-    profilers: [Option<ProfileSender>; 2],
     renderers: HashMap<SimId, TextureSink>,
     messages: HashMap<SimId, mpsc::Sender<Toast>>,
     debuggers: HashMap<SimId, DebugInfo>,
@@ -165,7 +164,6 @@ impl Emulator {
             state,
             audio_on,
             linked,
-            profilers: [None, None],
             renderers: HashMap::new(),
             messages: HashMap::new(),
             debuggers: HashMap::new(),
@@ -220,24 +218,6 @@ impl Emulator {
             self.carts[index] = Some(cart);
             self.sim_state[index].store(SimState::Ready, Ordering::Release);
         }
-        let mut profiling = false;
-        if let Some(profiler) = self.profilers[sim_id.to_index()].as_ref() {
-            if let Some(cart) = self.carts[index].as_ref() {
-                if profiler
-                    .send(ProfileEvent::Start {
-                        file_path: cart.file_path.clone(),
-                    })
-                    .is_ok()
-                {
-                    sim.monitor_events(true);
-                    profiling = true;
-                }
-            }
-        }
-        if !profiling {
-            sim.monitor_events(false);
-        }
-
         if self.sim_state[index].load(Ordering::Acquire) == SimState::Ready {
             self.resume_sims();
         }
@@ -335,11 +315,6 @@ impl Emulator {
         Ok(())
     }
 
-    fn start_profiling(&mut self, sim_id: SimId, sender: ProfileSender) -> Result<()> {
-        self.profilers[sim_id.to_index()] = Some(sender);
-        self.reset_sim(sim_id, None)
-    }
-
     fn start_debugging(&mut self, sim_id: SimId, sender: DebugSender) {
         if self.sim_state[sim_id.to_index()].load(Ordering::Acquire) != SimState::Ready {
             // Can't debug unless a game is connected
@@ -463,30 +438,12 @@ impl Emulator {
         let p1_running = running && p1_state == SimState::Ready;
         let p2_running = running && p2_state == SimState::Ready;
         let mut idle = !p1_running && !p2_running;
-
-        let cycles = self.emulate(p1_running, p2_running);
-
-        // if we're profiling, track events
-        for ((sim, profiler), running) in self
-            .sims
-            .iter_mut()
-            .zip(self.profilers.iter_mut())
-            .zip([p1_running, p2_running])
-        {
-            if !running {
-                continue;
-            }
-            if let Some(p) = profiler {
-                if p.send(ProfileEvent::Update {
-                    cycles,
-                    event: sim.take_sim_event(),
-                })
-                .is_err()
-                {
-                    sim.monitor_events(false);
-                    *profiler = None;
-                }
-            }
+        if p1_running && p2_running {
+            Sim::emulate_many(&mut self.sims);
+        } else if p1_running {
+            self.sims[SimId::Player1.to_index()].emulate();
+        } else if p2_running {
+            self.sims[SimId::Player2.to_index()].emulate();
         }
 
         if state == EmulatorState::Stepping {
@@ -513,7 +470,7 @@ impl Emulator {
                 let Some(sim) = self.sims.get_mut(sim_id.to_index()) else {
                     continue;
                 };
-                if let Some(reason) = sim.take_stop_reason() {
+                if let Some(reason) = sim.stop_reason() {
                     let stop_reason = match reason {
                         StopReason::Stepped => DebugStopReason::Trace,
                         StopReason::Watchpoint(watch, address) => {
@@ -572,19 +529,6 @@ impl Emulator {
         idle
     }
 
-    fn emulate(&mut self, p1_running: bool, p2_running: bool) -> u32 {
-        const MAX_CYCLES: u32 = 20_000_000;
-        let mut cycles = MAX_CYCLES;
-        if p1_running && p2_running {
-            Sim::emulate_many(&mut self.sims, &mut cycles);
-        } else if p1_running {
-            self.sims[SimId::Player1.to_index()].emulate(&mut cycles);
-        } else if p2_running {
-            self.sims[SimId::Player2.to_index()].emulate(&mut cycles);
-        }
-        MAX_CYCLES - cycles
-    }
-
     fn handle_command(&mut self, command: EmulatorCommand) {
         match command {
             EmulatorCommand::ConnectToSim(sim_id, renderer, messages) => {
@@ -628,11 +572,6 @@ impl Emulator {
                     self.report_error(SimId::Player1, format!("Error setting speed: {error}"));
                 }
             }
-            EmulatorCommand::StartProfiling(sim_id, profiler) => {
-                if let Err(error) = self.start_profiling(sim_id, profiler) {
-                    self.report_error(SimId::Player1, format!("Error enaling profiler: {error}"));
-                }
-            }
             EmulatorCommand::StartDebugging(sim_id, debugger) => {
                 self.start_debugging(sim_id, debugger);
             }
@@ -770,7 +709,6 @@ pub enum EmulatorCommand {
     Resume,
     FrameAdvance,
     SetSpeed(f64),
-    StartProfiling(SimId, ProfileSender),
     StartDebugging(SimId, DebugSender),
     StopDebugging(SimId),
     DebugInterrupt(SimId),
@@ -812,7 +750,6 @@ pub enum EmulatorState {
     Debugging,
 }
 
-type ProfileSender = tokio::sync::mpsc::UnboundedSender<ProfileEvent>;
 type DebugSender = tokio::sync::mpsc::UnboundedSender<DebugEvent>;
 
 #[derive(Clone, Copy, Debug, PartialEq, Eq)]
@@ -836,16 +773,6 @@ pub enum DebugEvent {
     Stopped(DebugStopReason),
 }
 
-pub enum ProfileEvent {
-    Start {
-        file_path: PathBuf,
-    },
-    Update {
-        cycles: u32,
-        event: Option<SimEvent>,
-    },
-}
-
 #[derive(Clone)]
 pub struct EmulatorClient {
     queue: mpsc::Sender<EmulatorCommand>,

src/emulator/cart.rs

@@ -1,7 +1,10 @@
-use anyhow::Result;
+use anyhow::{Context, Result, bail};
 use rand::Rng;
+use serde::Deserialize;
+use sha2::Digest;
 use std::{
-    fs::{self, File},
+    ffi::OsStr,
+    fs,
     io::{Read, Seek as _, SeekFrom, Write as _},
     path::{Path, PathBuf},
 };
@@ -11,39 +14,52 @@ use crate::emulator::SimId;
 pub struct Cart {
     pub file_path: PathBuf,
     pub rom: Vec<u8>,
-    sram_file: File,
+    sram_file: fs::File,
     pub sram: Vec<u8>,
 }
 
 impl Cart {
     pub fn load(file_path: &Path, sim_id: SimId) -> Result<Self> {
-        let rom = fs::read(file_path)?;
-        let rom = try_parse_elf(&rom).unwrap_or(rom);
+        let vbx_extension = OsStr::new("vbx");
+        let contents = if file_path.extension() == Some(vbx_extension) {
+            read_bundle(file_path)
+        } else {
+            read_rom(file_path)
+        }?;
 
-        let mut sram_file = File::options()
+        let mut sram_file = fs::File::options()
             .read(true)
             .write(true)
             .create(true)
             .truncate(false)
             .open(sram_path(file_path, sim_id))?;
 
+        let sram_file_size = if contents.sram_small_bus {
+            contents.sram_size * 2
+        } else {
+            contents.sram_size
+        };
         let sram = if sram_file.metadata()?.len() == 0 {
             // new SRAM file, randomize the contents
-            let mut sram = vec![0; 16 * 1024];
+            let mut sram = vec![0; sram_file_size];
             let mut rng = rand::rng();
-            for dst in sram.iter_mut().step_by(2) {
+            for dst in sram
+                .iter_mut()
+                .step_by(if contents.sram_small_bus { 2 } else { 1 })
+            {
                 *dst = rng.random();
             }
             sram
         } else {
-            let mut sram = Vec::with_capacity(16 * 1024);
+            let mut sram = Vec::with_capacity(sram_file_size);
             sram_file.read_to_end(&mut sram)?;
+            sram.resize(sram_file_size, 0);
             sram
         };
 
         Ok(Cart {
             file_path: file_path.to_path_buf(),
-            rom,
+            rom: contents.rom,
             sram_file,
             sram,
         })
@@ -56,21 +72,79 @@ impl Cart {
     }
 }
 
-fn try_parse_elf(data: &[u8]) -> Option<Vec<u8>> {
-    let parsed = elf::ElfBytes::<elf::endian::AnyEndian>::minimal_parse(data).ok()?;
-    let mut bytes = vec![];
-    let mut pstart = None;
-    for phdr in parsed.segments()? {
-        if phdr.p_filesz == 0 {
-            continue;
+struct CartContents {
+    rom: Vec<u8>,
+    sram_size: usize,
+    sram_small_bus: bool,
+}
+
+fn read_bundle(file_path: &Path) -> Result<CartContents> {
+    let file = fs::File::open(file_path)?;
+    let mut archive = zip::ZipArchive::new(file).context("invalid VBX")?;
+    let manifest_reader = archive
+        .by_name("manifest.json")
+        .context("manifest.json not found")?;
+    let manifest: Manifest =
+        serde_json::from_reader(manifest_reader).context("malformed manifest")?;
+    let rom = {
+        let mut rom_file = archive
+            .by_name(&manifest.rom.file)
+            .context("ROM file not found")?;
+        let mut buffer = Vec::with_capacity(rom_file.size() as usize);
+        rom_file
+            .read_to_end(&mut buffer)
+            .context("could not read ROM")?;
+        buffer
+    };
+    if let Some(hash) = manifest.rom.sha256 {
+        let expected_hash = hex::decode(hash)?;
+        let actual_hash = sha2::Sha256::digest(&rom);
+        if expected_hash[..] != actual_hash[..] {
+            bail!("Incorrect ROM hash");
         }
-        let start = pstart.unwrap_or(phdr.p_paddr);
-        pstart = Some(start);
-        bytes.resize((phdr.p_paddr - start) as usize, 0);
-        let data = parsed.segment_data(&phdr).ok()?;
-        bytes.extend_from_slice(data);
     }
-    Some(bytes)
+
+    let sram_size = manifest.sram.as_ref().map(|s| s.size).unwrap_or(8192);
+    if !sram_size.is_power_of_two() {
+        bail!("Invalid SRAM size, must be power of two")
+    }
+    let sram_small_bus = manifest.sram.and_then(|s| s.bus_width).unwrap_or_default() < 16;
+
+    Ok(CartContents {
+        rom,
+        sram_size,
+        sram_small_bus,
+    })
+}
+
+#[derive(Deserialize)]
+#[serde(rename_all = "camelCase")]
+struct Manifest {
+    rom: ManifestRom,
+    sram: Option<ManifestSram>,
+}
+
+#[derive(Deserialize)]
+#[serde(rename_all = "camelCase")]
+struct ManifestRom {
+    file: String,
+    sha256: Option<String>,
+}
+
+#[derive(Deserialize)]
+#[serde(rename_all = "camelCase")]
+struct ManifestSram {
+    size: usize,
+    bus_width: Option<usize>,
+}
+
+fn read_rom(rom_path: &Path) -> Result<CartContents> {
+    let rom = fs::read(rom_path)?;
+    Ok(CartContents {
+        rom,
+        sram_size: 8192,
+        sram_small_bus: true,
+    })
 }
 
 fn sram_path(file_path: &Path, sim_id: SimId) -> PathBuf {

src/emulator/shrooms_vb_core.rs

@@ -71,16 +71,8 @@ pub enum VBWatchpointType {
     Access,
 }
 
-type OnException = extern "C" fn(sim: *mut VB, cause: *mut u16) -> c_int;
 type OnExecute =
     extern "C" fn(sim: *mut VB, address: u32, code: *const u16, length: c_int) -> c_int;
-type OnFetch = extern "C" fn(
-    sim: *mut VB,
-    fetch: c_int,
-    address: u32,
-    value: *mut i32,
-    cycles: *mut u32,
-) -> c_int;
 type OnFrame = extern "C" fn(sim: *mut VB) -> c_int;
 type OnRead = extern "C" fn(
     sim: *mut VB,
@@ -143,15 +135,8 @@ unsafe extern "C" {
     fn vb_set_cart_ram(sim: *mut VB, sram: *mut c_void, size: u32) -> c_int;
     #[link_name = "vbSetCartROM"]
     fn vb_set_cart_rom(sim: *mut VB, rom: *mut c_void, size: u32) -> c_int;
-    #[link_name = "vbSetExceptionCallback"]
-    fn vb_set_exception_callback(
-        sim: *mut VB,
-        callback: Option<OnException>,
-    ) -> Option<OnException>;
     #[link_name = "vbSetExecuteCallback"]
     fn vb_set_execute_callback(sim: *mut VB, callback: Option<OnExecute>) -> Option<OnExecute>;
-    #[link_name = "vbSetFetchCallback"]
-    fn vb_set_fetch_callback(sim: *mut VB, callback: Option<OnFetch>) -> Option<OnFetch>;
     #[link_name = "vbSetFrameCallback"]
     fn vb_set_frame_callback(sim: *mut VB, callback: Option<OnFrame>) -> Option<OnFrame>;
     #[link_name = "vbSetKeys"]
@@ -195,21 +180,11 @@ extern "C" fn on_frame(sim: *mut VB) -> c_int {
 }
 
 #[unsafe(no_mangle)]
-extern "C" fn on_execute(sim: *mut VB, address: u32, code: *const u16, length: c_int) -> c_int {
+extern "C" fn on_execute(sim: *mut VB, address: u32, _code: *const u16, _length: c_int) -> c_int {
     // SAFETY: the *mut VB owns its userdata.
     // There is no way for the userdata to be null or otherwise invalid.
     let data: &mut VBState = unsafe { &mut *vb_get_user_data(sim).cast() };
 
-    if data.monitor.enabled {
-        // SAFETY: length is the length of code, in elements
-        let code = unsafe { slice::from_raw_parts(code, length as usize) };
-        if data.monitor.detect_event(sim, address, code) {
-            // Something interesting will happen after this instruction is run.
-            // The on_fetch callback will fire when it does.
-            unsafe { vb_set_fetch_callback(sim, Some(on_fetch)) };
-        }
-    }
-
     let mut stopped = data.stop_reason.is_some();
     if data.step_from.is_some_and(|s| s != address) {
         data.step_from = None;
@@ -224,35 +199,6 @@ extern "C" fn on_execute(sim: *mut VB, address: u32, code: *const u16, length: c
     if stopped { 1 } else { 0 }
 }
 
-#[unsafe(no_mangle)]
-extern "C" fn on_fetch(
-    sim: *mut VB,
-    _fetch: c_int,
-    _address: u32,
-    _value: *mut i32,
-    _cycles: *mut u32,
-) -> c_int {
-    // SAFETY: the *mut VB owns its userdata.
-    // There is no way for the userdata to be null or otherwise invalid.
-    let data: &mut VBState = unsafe { &mut *vb_get_user_data(sim).cast() };
-    data.monitor.event = data.monitor.queued_event.take();
-    unsafe { vb_set_exception_callback(sim, Some(on_exception)) };
-    unsafe { vb_set_fetch_callback(sim, None) };
-    1
-}
-
-#[unsafe(no_mangle)]
-extern "C" fn on_exception(sim: *mut VB, cause: *mut u16) -> c_int {
-    // SAFETY: the *mut VB owns its userdata.
-    // There is no way for the userdata to be null or otherwise invalid.
-    let data: &mut VBState = unsafe { &mut *vb_get_user_data(sim).cast() };
-    data.monitor.event = data.monitor.queued_event.take();
-    data.monitor.queued_event = Some(SimEvent::Interrupt(unsafe { *cause }));
-    unsafe { vb_set_exception_callback(sim, None) };
-    unsafe { vb_set_fetch_callback(sim, Some(on_fetch)) };
-    if data.monitor.event.is_some() { 1 } else { 0 }
-}
-
 #[unsafe(no_mangle)]
 extern "C" fn on_read(
     sim: *mut VB,
@@ -314,83 +260,6 @@ extern "C" fn on_write(
     0
 }
 
-#[allow(dead_code)]
-#[derive(Debug)]
-pub enum SimEvent {
-    Call(u32),
-    Return,
-    Interrupt(u16),
-    Reti,
-}
-
-struct EventMonitor {
-    enabled: bool,
-    event: Option<SimEvent>,
-    queued_event: Option<SimEvent>,
-}
-
-impl EventMonitor {
-    fn new() -> Self {
-        Self {
-            enabled: false,
-            event: None,
-            queued_event: None,
-        }
-    }
-
-    fn detect_event(&mut self, sim: *mut VB, address: u32, code: &[u16]) -> bool {
-        self.queued_event = self.do_detect_event(sim, address, code);
-        self.queued_event.is_some()
-    }
-
-    fn do_detect_event(&self, sim: *mut VB, address: u32, code: &[u16]) -> Option<SimEvent> {
-        const JAL_OPCODE: u16 = 0b101011;
-        const JMP_OPCODE: u16 = 0b000110;
-        const RETI_OPCODE: u16 = 0b011001;
-
-        const fn format_i_reg_1(code: &[u16]) -> u8 {
-            (code[0] & 0x1f) as u8
-        }
-
-        const fn format_iv_disp(code: &[u16]) -> i32 {
-            let value = ((code[0] & 0x3ff) as i32) << 16 | (code[1] as i32);
-            value << 6 >> 6
-        }
-
-        let opcode = code[0] >> 10;
-
-        if opcode == JAL_OPCODE {
-            let disp = format_iv_disp(code);
-            if disp != 4 {
-                // JAL .+4 is how programs get r31 to a known value for indirect calls
-                // (which we detect later.)
-                // Any other JAL is a function call.
-                return Some(SimEvent::Call(address.wrapping_add_signed(disp)));
-            }
-        }
-
-        if opcode == JMP_OPCODE {
-            let jmp_reg = format_i_reg_1(code);
-            if jmp_reg == 31 {
-                // JMP[r31] is a return
-                return Some(SimEvent::Return);
-            }
-            let r31 = unsafe { vb_get_program_register(sim, 31) };
-            if r31 as u32 == address.wrapping_add(2) {
-                // JMP anywhere else, if r31 points to after the JMP, is an indirect call
-                let target = unsafe { vb_get_program_register(sim, jmp_reg as u32) };
-                return Some(SimEvent::Call(target as u32));
-            }
-        }
-
-        if opcode == RETI_OPCODE {
-            return Some(SimEvent::Reti);
-        }
-
-        None
-    }
-}
-
 const AUDIO_CAPACITY_SAMPLES: usize = 834 * 4;
 const AUDIO_CAPACITY_FLOATS: usize = AUDIO_CAPACITY_SAMPLES * 2;
 pub const EXPECTED_FRAME_SIZE: usize = 834 * 2;
@@ -398,7 +267,6 @@ pub const EXPECTED_FRAME_SIZE: usize = 834 * 2;
 struct VBState {
     frame_seen: bool,
     stop_reason: Option<StopReason>,
-    monitor: EventMonitor,
     step_from: Option<u32>,
     breakpoints: Vec<u32>,
     read_watchpoints: AddressSet,
@@ -409,7 +277,6 @@ struct VBState {
 impl VBState {
     fn needs_execute_callback(&self) -> bool {
         self.step_from.is_some()
-            || self.monitor.enabled
             || !self.breakpoints.is_empty()
             || !self.read_watchpoints.is_empty()
             || !self.write_watchpoints.is_empty()
@@ -444,7 +311,6 @@ impl Sim {
         let state = VBState {
             frame_seen: false,
             stop_reason: None,
-            monitor: EventMonitor::new(),
             step_from: None,
             breakpoints: vec![],
             read_watchpoints: AddressSet::new(),
@@ -466,23 +332,6 @@ impl Sim {
         unsafe { vb_reset(self.sim) };
     }
 
-    pub fn monitor_events(&mut self, enabled: bool) {
-        let state = self.get_state();
-        state.monitor.enabled = enabled;
-        state.monitor.event = None;
-        state.monitor.queued_event = None;
-        if enabled {
-            unsafe { vb_set_execute_callback(self.sim, Some(on_execute)) };
-            unsafe { vb_set_exception_callback(self.sim, Some(on_exception)) };
-        } else {
-            if !state.needs_execute_callback() {
-                unsafe { vb_set_execute_callback(self.sim, None) };
-            }
-            unsafe { vb_set_exception_callback(self.sim, None) };
-            unsafe { vb_set_fetch_callback(self.sim, None) };
-        }
-    }
-
     pub fn load_cart(&mut self, mut rom: Vec<u8>, mut sram: Vec<u8>) -> Result<()> {
         self.unload_cart();
 
@@ -545,14 +394,16 @@ impl Sim {
         unsafe { vb_set_peer(self.sim, ptr::null_mut()) };
     }
 
-    pub fn emulate(&mut self, cycles: &mut u32) {
-        unsafe { vb_emulate(self.sim, cycles) };
+    pub fn emulate(&mut self) {
+        let mut cycles = 20_000_000;
+        unsafe { vb_emulate(self.sim, &mut cycles) };
     }
 
-    pub fn emulate_many(sims: &mut [Sim], cycles: &mut u32) {
+    pub fn emulate_many(sims: &mut [Sim]) {
+        let mut cycles = 20_000_000;
         let count = sims.len() as c_uint;
         let sims = sims.as_mut_ptr().cast();
-        unsafe { vb_emulate_ex(sims, count, cycles) };
+        unsafe { vb_emulate_ex(sims, count, &mut cycles) };
     }
 
     pub fn read_pixels(&mut self, buffers: &mut [u8]) -> bool {
@@ -781,7 +632,7 @@ impl Sim {
         Some(string)
     }
 
-    pub fn take_stop_reason(&mut self) -> Option<StopReason> {
+    pub fn stop_reason(&mut self) -> Option<StopReason> {
         let data = self.get_state();
         let reason = data.stop_reason.take();
         if !data.needs_execute_callback() {
@@ -790,11 +641,6 @@ impl Sim {
         reason
     }
 
-    pub fn take_sim_event(&mut self) -> Option<SimEvent> {
-        let data = self.get_state();
-        data.monitor.event.take()
-    }
-
     fn get_state(&mut self) -> &mut VBState {
         // SAFETY: the *mut VB owns its userdata.
         // There is no way for the userdata to be null or otherwise invalid.

src/main.rs

@@ -22,7 +22,6 @@ mod images;
 mod input;
 mod memory;
 mod persistence;
-mod profiler;
 mod window;
 
 #[derive(Parser)]
@@ -32,9 +31,6 @@ struct Args {
     /// Start a GDB/LLDB debug server on this port.
     #[arg(short, long)]
     debug_port: Option<u16>,
-    /// Enable profiling a game
-    #[arg(short, long)]
-    profile: bool,
 }
 
 fn init_logger() {
@@ -110,9 +106,6 @@ fn main() -> Result<()> {
         }
         builder = builder.start_paused(true);
     }
-    if args.profile {
-        builder = builder.start_paused(true)
-    }
 
     ThreadBuilder::default()
         .name("Emulator".to_owned())
@@ -131,11 +124,6 @@ fn main() -> Result<()> {
     let event_loop = EventLoop::with_user_event().build().unwrap();
     event_loop.set_control_flow(ControlFlow::Poll);
     let proxy = event_loop.create_proxy();
-    event_loop.run_app(&mut Application::new(
-        client,
-        proxy,
-        args.debug_port,
-        args.profile,
-    ))?;
+    event_loop.run_app(&mut Application::new(client, proxy, args.debug_port))?;
     Ok(())
 }

src/profiler.rs

@@ -1,176 +0,0 @@
-use std::{
-    collections::HashMap,
-    path::PathBuf,
-    sync::{
-        Arc,
-        atomic::{AtomicBool, Ordering},
-    },
-    thread,
-};
-
-use tokio::{select, sync::mpsc};
-use wholesym::{SymbolManager, SymbolMap};
-
-use crate::emulator::{EmulatorClient, EmulatorCommand, ProfileEvent, SimEvent, SimId};
-
-pub struct Profiler {
-    sim_id: SimId,
-    client: EmulatorClient,
-    running: Arc<AtomicBool>,
-    killer: Option<oneshot::Sender<()>>,
-}
-
-impl Profiler {
-    pub fn new(sim_id: SimId, client: EmulatorClient) -> Self {
-        Self {
-            sim_id,
-            client,
-            running: Arc::new(AtomicBool::new(false)),
-            killer: None,
-        }
-    }
-
-    pub fn started(&self) -> bool {
-        self.running.load(Ordering::Relaxed)
-    }
-
-    pub fn start(&mut self) {
-        let sim_id = self.sim_id;
-        let client = self.client.clone();
-        let running = self.running.clone();
-        let (tx, rx) = oneshot::channel();
-        self.killer = Some(tx);
-        thread::spawn(move || {
-            tokio::runtime::Builder::new_current_thread()
-                .enable_all()
-                .build()
-                .unwrap()
-                .block_on(async move {
-                    select! {
-                        _ = run_profile(sim_id, client, running.clone()) => {}
-                        _ = rx => {
-                            running.store(false, Ordering::Relaxed);
-                        }
-                    }
-                })
-        });
-    }
-
-    pub fn stop(&mut self) {
-        if let Some(killer) = self.killer.take() {
-            let _ = killer.send(());
-        }
-    }
-}
-
-async fn run_profile(sim_id: SimId, client: EmulatorClient, running: Arc<AtomicBool>) {
-    let (profile_sync, mut profile_source) = mpsc::unbounded_channel();
-    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 } => {
-                session = Some(ProfileSession::new(file_path).await);
-            }
-            ProfileEvent::Update { cycles, event } => {
-                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");
-                }
-            }
-        }
-    }
-}

src/window.rs

@@ -4,7 +4,6 @@ pub use game::GameWindow;
 pub use gdb::GdbServerWindow;
 pub use hotkeys::HotkeysWindow;
 pub use input::InputWindow;
-pub use profile::ProfileWindow;
 pub use terminal::TerminalWindow;
 pub use vip::{
     BgMapWindow, CharacterDataWindow, FrameBufferWindow, ObjectWindow, RegisterWindow, WorldWindow,
@@ -19,7 +18,6 @@ mod game_screen;
 mod gdb;
 mod hotkeys;
 mod input;
-mod profile;
 mod terminal;
 mod utils;
 mod vip;

src/window/game.rs

@@ -228,11 +228,6 @@ impl GameWindow {
                     .send_event(UserEvent::OpenTerminal(self.sim_id))
                     .unwrap();
             }
-            if ui.button("Profiler").clicked() {
-                self.proxy
-                    .send_event(UserEvent::OpenProfiler(self.sim_id))
-                    .unwrap();
-            }
             if ui.button("GDB Server").clicked() {
                 self.proxy
                     .send_event(UserEvent::OpenDebugger(self.sim_id))

src/window/profile.rs

@@ -1,54 +0,0 @@
-use egui::{CentralPanel, ViewportBuilder, ViewportId};
-
-use crate::{
-    emulator::{EmulatorClient, SimId},
-    profiler::Profiler,
-    window::AppWindow,
-};
-
-pub struct ProfileWindow {
-    sim_id: SimId,
-    profiler: Profiler,
-}
-
-impl ProfileWindow {
-    pub fn new(sim_id: SimId, client: EmulatorClient) -> Self {
-        Self {
-            sim_id,
-            profiler: Profiler::new(sim_id, client),
-        }
-    }
-
-    pub fn launch(&mut self) {
-        self.profiler.start();
-    }
-}
-
-impl AppWindow for ProfileWindow {
-    fn viewport_id(&self) -> ViewportId {
-        ViewportId::from_hash_of(format!("Profile-{}", self.sim_id))
-    }
-
-    fn sim_id(&self) -> SimId {
-        self.sim_id
-    }
-
-    fn initial_viewport(&self) -> ViewportBuilder {
-        ViewportBuilder::default()
-            .with_title(format!("Profiler ({})", self.sim_id))
-            .with_inner_size((300.0, 200.0))
-    }
-
-    fn show(&mut self, ctx: &egui::Context) {
-        CentralPanel::default().show(ctx, |ui| {
-            let mut started = self.profiler.started();
-            if ui.checkbox(&mut started, "Profiling enabled?").changed() {
-                if started {
-                    self.profiler.start();
-                } else {
-                    self.profiler.stop();
-                }
-            }
-        });
-    }
-}