Remove dead code from bun_jsc, bun_runtime, bun_core, and the JSC bindings

src/bun_core/env_var.rs

@@ -256,7 +256,6 @@ pub mod feature_flag {
     new_feature_flag!(pub BUN_FEATURE_FLAG_DISABLE_STANDALONE_MADVISE, "BUN_FEATURE_FLAG_DISABLE_STANDALONE_MADVISE", {});
     new_feature_flag!(pub BUN_DISABLE_TRANSPILED_SOURCE_CODE_PREVIEW, "BUN_DISABLE_TRANSPILED_SOURCE_CODE_PREVIEW", {});
     new_feature_flag!(pub BUN_FEATURE_FLAG_DISABLE_UV_FS_COPYFILE, "BUN_FEATURE_FLAG_DISABLE_UV_FS_COPYFILE", {});
-    new_feature_flag!(pub BUN_DUMP_STATE_ON_CRASH, "BUN_DUMP_STATE_ON_CRASH", {});
     new_feature_flag!(pub BUN_ENABLE_EXPERIMENTAL_SHELL_BUILTINS, "BUN_ENABLE_EXPERIMENTAL_SHELL_BUILTINS", {});
     new_feature_flag!(pub BUN_FEATURE_FLAG_EXPERIMENTAL_BAKE, "BUN_FEATURE_FLAG_EXPERIMENTAL_BAKE", {});
     // Offer "h2" in the fetch() TLS ALPN list and speak HTTP/2 when the

src/bun_core/string/immutable.rs

@@ -606,17 +606,6 @@ pub fn split_once<'a>(self_: &'a [u8], delimiter: &[u8]) -> Option<(&'a [u8], &'
     Some((&self_[..i], &self_[i + delimiter.len()..]))
 }
 
-/// `str::rsplit_once` for bytes with a multi-byte delimiter. An empty
-/// delimiter never matches.
-#[inline]
-pub fn rsplit_once<'a>(self_: &'a [u8], delimiter: &[u8]) -> Option<(&'a [u8], &'a [u8])> {
-    if delimiter.is_empty() {
-        return None;
-    }
-    let i = last_index_of(self_, delimiter)?;
-    Some((&self_[..i], &self_[i + delimiter.len()..]))
-}
-
 pub struct SplitIterator<'a> {
     pub(crate) buffer: &'a [u8],
     pub(crate) index: Option<usize>,

src/jsc/ConsoleObject.rs

@@ -5872,42 +5872,6 @@ pub(crate) extern "C" fn Bun__ConsoleObject__timeLog(
     let _ = bun_io::Write::flush(&mut writer);
 }
 
-/// Stamp out the empty `Bun__ConsoleObject__*` C-ABI hooks that JSC's
-/// `ConsoleClient` vtable requires but Bun leaves unimplemented. Two arms cover
-/// the two trailing-arg shapes the C++ side declares in
-/// `bindings/headers.h:686-694`: `(…, *const u8, usize)` for the title-string
-/// hooks and `(…, *mut ScriptArguments)` for the inspector-args hooks.
-///
-/// Ident concat via `${concat()}` is unstable (`macro_metavar_expr_concat`)
-/// and `paste` is not a `bun_jsc` dep, so the full `Bun__ConsoleObject__<name>`
-/// export symbol is passed verbatim — same pattern as `export_callbacks!` in
-/// `runtime/api/BunObject.rs`.
-macro_rules! console_noop_hooks {
-    (str: $($name:ident),+ $(,)?) => {$(
-        #[unsafe(no_mangle)]
-        #[crate::host_call]
-        pub extern "C" fn $name(
-            _console: *mut ConsoleObject,
-            _global: &JSGlobalObject,
-            _chars: *const u8,
-            _len: usize,
-        ) {
-        }
-    )+};
-    (args: $($name:ident),+ $(,)?) => {$(
-        #[unsafe(no_mangle)]
-        #[crate::host_call]
-        pub extern "C" fn $name(
-            _console: *mut ConsoleObject,
-            _global: &JSGlobalObject,
-            _args: *mut ScriptArguments,
-        ) {
-        }
-    )+};
-}
-
-console_noop_hooks!(str: Bun__ConsoleObject__profile, Bun__ConsoleObject__profileEnd);
-
 #[unsafe(no_mangle)]
 #[crate::host_call]
 pub(crate) extern "C" fn Bun__ConsoleObject__takeHeapSnapshot(
@@ -5931,13 +5895,16 @@ pub(crate) extern "C" fn Bun__ConsoleObject__takeHeapSnapshot(
     }
 }
 
-console_noop_hooks!(
-    args:
-    Bun__ConsoleObject__timeStamp,
-    Bun__ConsoleObject__record,
-    Bun__ConsoleObject__recordEnd,
-    Bun__ConsoleObject__screenshot,
-);
+/// `console.timeStamp()` is a no-op: JSC's `ConsoleClient` requires the hook,
+/// Bun leaves it unimplemented.
+#[unsafe(no_mangle)]
+#[crate::host_call]
+pub(crate) extern "C" fn Bun__ConsoleObject__timeStamp(
+    _console: *mut ConsoleObject,
+    _global: &JSGlobalObject,
+    _args: *mut ScriptArguments,
+) {
+}
 
 #[unsafe(no_mangle)]
 #[crate::host_call]

src/jsc/FetchHeaders.rs

@@ -47,13 +47,6 @@ unsafe extern "C" {
         arg3: *const EncodedSlice,
         arg4: u32,
     ) -> *mut FetchHeaders;
-    fn WebCore__FetchHeaders__createValue(
-        arg0: *const JSGlobalObject,
-        arg1: *mut StringPointer,
-        arg2: *mut StringPointer,
-        arg3: *const EncodedSlice,
-        arg4: u32,
-    ) -> JSValue;
     // safe: `FetchHeaders` is an `opaque_ffi!` ZST handle; `&mut` is ABI-identical
     // to a non-null `*mut` and the C++ refcount decrement is interior to the cell.
     safe fn WebCore__FetchHeaders__deref(arg0: &mut FetchHeaders);
@@ -148,23 +141,6 @@ impl FetchHeaders {
         })
     }
 
-    /// Like [`create`](Self::create) but wrapped as a JS `Headers`. The C++
-    /// side returns the wrapper even after `fill` threw, so the exception state
-    /// is checked explicitly.
-    pub fn from(
-        global: &JSGlobalObject,
-        names: *mut StringPointer,
-        values: *mut StringPointer,
-        buf: &EncodedSlice,
-        count_: u32,
-    ) -> JsResult<JSValue> {
-        // SAFETY: forwarding caller-provided buffers to C++; `global` is an opaque ZST handle
-        // passed by address only.
-        crate::call_check_slow(global, || unsafe {
-            WebCore__FetchHeaders__createValue(global, names, values, buf, count_)
-        })
-    }
-
     pub fn is_empty(&mut self) -> bool {
         WebCore__FetchHeaders__isEmpty(self)
     }

src/jsc/JSGlobalObject.rs

@@ -9,8 +9,8 @@ use crate::bun_string_jsc::{ErrorKind, error_instance};
 use crate::error_code::ErrorBuilder;
 use crate::virtual_machine::VirtualMachine;
 use crate::{
-    CommonStrings, DOMExceptionCode, ErrorableString, Exception, JSValue, JsError, JsResult,
-    MAX_SAFE_INTEGER, MIN_SAFE_INTEGER, VM,
+    CommonStrings, DOMExceptionCode, ErrorableString, JSValue, JsError, JsResult, MAX_SAFE_INTEGER,
+    MIN_SAFE_INTEGER, VM,
 };
 use bun_core::EncodedSlice;
 use bun_core::StringView;
@@ -1431,16 +1431,6 @@ extern "C" fn Zig__GlobalObject__resolve(
     }
 }
 
-#[unsafe(no_mangle)]
-unsafe extern "C" fn Zig__GlobalObject__reportUncaughtException(
-    global: *const JSGlobalObject,
-    exception: *mut Exception,
-) -> JSValue {
-    crate::mark_binding();
-    // SAFETY: C++ passes valid non-null pointers.
-    unsafe { VirtualMachine::report_uncaught_exception(&*global, &*exception) }
-}
-
 #[unsafe(no_mangle)]
 extern "C" fn Zig__GlobalObject__onCrash() {
     crate::mark_binding();

src/jsc/VM.rs

@@ -121,12 +121,6 @@ impl VM {
         JSC__VM__terminationException(self)
     }
 
-    /// Has termination been requested on this VM (worker.terminate(), or
-    /// teardown's forbidExecution)? JS thread.
-    pub fn has_termination_request(&self) -> bool {
-        crate::cpp::JSC__VM__hasTerminationRequest(self)
-    }
-
     #[track_caller]
     pub fn throw_error(&self, global_object: &JSGlobalObject, value: JSValue) -> JsError {
         crate::validation_scope!(scope, global_object);

src/jsc/VirtualMachine.rs

@@ -5434,16 +5434,6 @@ impl VirtualMachine {
         false
     }
 
-    /// Reports an uncaught exception through the owning VM's handler; returns `undefined`.
-    pub(crate) fn report_uncaught_exception(
-        global_object: &JSGlobalObject,
-        exception: &Exception,
-    ) -> JSValue {
-        let jsc_vm = global_object.bun_vm().as_mut();
-        let _ = jsc_vm.uncaught_exception(global_object, exception.value(), false);
-        JSValue::UNDEFINED
-    }
-
     /// Note: takes a runtime bool + concrete writer.
     pub(crate) fn print_stack_trace(
         writer: &mut bun_core::io::Writer,

src/jsc/array_buffer.rs

@@ -999,11 +999,6 @@ impl MarkedArrayBuffer {
 // `no_mangle` dropped: 0 C++ refs (phase_c_exports.rs mention is a comment).
 pub use bun_alloc::c_thunks::mi_free_bytes as MarkedArrayBuffer_deallocator;
 
-// LAYERING: `BlobArrayBuffer_deallocator` releases a
-// `Blob::Store` ref. `Store` is a `bun_runtime` type, so the `#[no_mangle]`
-// export lives next to it at `bun_runtime::webcore::blob::Store` — `bun_jsc`
-// cannot own this symbol without a dep cycle. C++ links by name only.
-
 // ──────────────────────────────────────────────────────────────────────────
 // Free functions
 // ──────────────────────────────────────────────────────────────────────────

src/jsc/bindings/DOMFormData.cpp

@@ -57,18 +57,6 @@ Ref<DOMFormData> DOMFormData::create(ScriptExecutionContext* context, const Stri
     return newFormData;
 }
 
-String DOMFormData::toURLEncodedString()
-{
-    WTF::URLParser::URLEncodedForm form;
-    form.reserveInitialCapacity(m_items.size());
-    for (auto& item : m_items) {
-        if (auto value = std::get_if<String>(&item.data))
-            form.append({ item.name, *value });
-    }
-
-    return WTF::URLParser::serialize(form);
-}
-
 extern "C" void DOMFormData__forEach(DOMFormData* form, void* context, void (*callback)(void* context, EncodedSlice*, void*, EncodedSlice*, uint8_t))
 {
     for (auto& item : form->items()) {

src/jsc/bindings/DOMFormData.h

@@ -77,8 +77,6 @@ class DOMFormData : public RefCounted<DOMFormData>, public ContextDestructionObs
     size_t count() const { return m_items.size(); }
     size_t memoryCost() const;
 
-    String toURLEncodedString();
-
     class Iterator {
     public:
         explicit Iterator(DOMFormData&);

src/jsc/bindings/JSCommonJSModule.cpp

@@ -531,8 +531,6 @@ JSC_DEFINE_CUSTOM_SETTER(setterPath,
     return true;
 }
 
-extern "C" JSC::EncodedJSValue Resolver__propForRequireMainPaths(JSGlobalObject*);
-
 JSC_DEFINE_CUSTOM_GETTER(getterPaths, (JSC::JSGlobalObject * globalObject, JSC::EncodedJSValue thisValue, JSC::PropertyName))
 {
     auto scope = DECLARE_THROW_SCOPE(globalObject->vm());

src/jsc/bindings/NapiRef.cpp

@@ -37,13 +37,4 @@ void NapiRef::unref()
     }
 }
 
-void NapiRef::clear()
-{
-    NAPI_LOG("ref clear %p", this);
-    finalizer.call(env.ptr(), nativeObject);
-    globalObject.clear();
-    weakValueRef.clear();
-    strongRef.clear();
-}
-
 }

src/jsc/bindings/ZigGlobalObject.cpp

@@ -233,8 +233,6 @@
 
 using namespace Bun;
 
-BUN_DECLARE_HOST_FUNCTION(Bun__NodeUtil__jsParseArgs);
-
 JSC_DECLARE_HOST_FUNCTION(jsFunctionMakeAbortError);
 
 using JSGlobalObject = JSC::JSGlobalObject;

src/jsc/bindings/bindings.cpp

@@ -2610,28 +2610,6 @@ WebCore::FetchHeaders* WebCore__FetchHeaders__createValueNotJS(JSC::JSGlobalObje
     return headers;
 }
 
-JSC::EncodedJSValue WebCore__FetchHeaders__createValue(JSC::JSGlobalObject* arg0, StringPointer* arg1, StringPointer* arg2, const EncodedSlice* arg3, uint32_t count)
-{
-    auto throwScope = DECLARE_THROW_SCOPE(arg0->vm());
-    Vector<KeyValuePair<String, String>> pairs;
-    pairs.reserveCapacity(count);
-    EncodedSlice buf = *arg3;
-    for (uint32_t i = 0; i < count; i++) {
-        WTF::String name = Zig::toStringCopy(buf, arg1[i]);
-        WTF::String value = Zig::toStringCopy(buf, arg2[i]);
-        pairs.unsafeAppendWithoutCapacityCheck(KeyValuePair<String, String>(name, value));
-    }
-
-    Ref<WebCore::FetchHeaders> headers = WebCore::FetchHeaders::create();
-    WebCore::propagateException(*arg0, throwScope, headers->fill(WebCore::FetchHeaders::Init(WTF::move(pairs))));
-
-    JSValue value = WebCore::toJSNewlyCreated(arg0, static_cast<Zig::GlobalObject*>(arg0), WTF::move(headers));
-
-    JSFetchHeaders* fetchHeaders = uncheckedDowncast<JSFetchHeaders>(value);
-    fetchHeaders->computeMemoryCost();
-    return JSC::JSValue::encode(fetchHeaders);
-}
-
 void WebCore__FetchHeaders__get_(WebCore::FetchHeaders* headers, const EncodedSlice* arg1, EncodedSlice* arg2, JSC::JSGlobalObject* global)
 {
     auto throwScope = DECLARE_THROW_SCOPE(global->vm());
@@ -5152,12 +5130,6 @@ bool JSC__VM__isTerminationException(JSC::VM* vm, JSC::Exception* exception)
     return vm->isTerminationException(exception);
 }
 
-[[ZIG_EXPORT(nothrow)]]
-bool JSC__VM__hasTerminationRequest(JSC::VM* vm)
-{
-    return vm->hasTerminationRequest();
-}
-
 // The one crossing from the loop-level stop into the exception currency: a nested wait/drain inside a
 // host function learned of a stop and must hand a JsError to its caller, so it throws the VM's
 // TerminationException for real -- what VMTraps::handleTraps(NeedTermination) does. Always leaves it
@@ -6387,16 +6359,6 @@ CPP_DECL size_t WebCore__DOMFormData__count(WebCore::DOMFormData* arg0)
     return arg0->count();
 }
 
-extern "C" void DOMFormData__toQueryString(
-    DOMFormData* formData,
-    void* ctx,
-    void (*callback)(void* ctx, EncodedSlice* encoded))
-{
-    auto str = formData->toURLEncodedString();
-    EncodedSlice encoded = toEncodedSlice(str);
-    callback(ctx, &encoded);
-}
-
 CPP_DECL JSC::EncodedJSValue WebCore__DOMFormData__createFromURLQuery(JSC::JSGlobalObject* arg0, const EncodedSlice* arg1)
 {
     Zig::GlobalObject* globalObject = static_cast<Zig::GlobalObject*>(arg0);
@@ -6646,15 +6608,6 @@ CPP_DECL [[ZIG_EXPORT(nothrow)]] void JSC__SourceProvider__deref(JSC::SourceProv
     provider->deref();
 }
 
-CPP_DECL bool Bun__CallFrame__isFromBunMain(JSC::CallFrame* callFrame, JSC::VM* vm)
-{
-    auto source = callFrame->callerSourceOrigin(*vm);
-
-    if (source.isNull())
-        return false;
-    return source.string() == "builtin://bun/main"_s;
-}
-
 CPP_DECL void Bun__CallFrame__getCallerSrcLoc(JSC::CallFrame* callFrame, JSC::JSGlobalObject* globalObject, BunString* outSourceURL, unsigned int* outLine, unsigned int* outColumn)
 {
     auto& vm = JSC::getVM(globalObject);

src/jsc/bindings/napi.h

@@ -746,7 +746,6 @@ class NapiRef {
 public:
     void ref();
     void unref();
-    void clear();
 
     NapiRef(Ref<NapiEnv>&& env, uint32_t count, Bun::NapiFinalizer finalizer)
         : env(env)

src/jsc/lib.rs

@@ -7,7 +7,7 @@
 //! Those targets live in `bun_runtime`, which depends on this crate —
 //! re-exporting them here would create a cycle. Callers reference
 //! `bun_runtime::{webcore,api,node}` directly; lower-tier consumers that
-//! constructed those types (e.g. `output_file_jsc`, `BlobArrayBuffer_deallocator`)
+//! constructed those types (e.g. `output_file_jsc`)
 //! have been moved up into `bun_runtime`, and the few that only need an opaque
 //! borrow (e.g. `DOMFormData::for_each`) are generic over the caller's `Blob`.
 

src/jsc/resolver_jsc.rs

@@ -22,13 +22,6 @@ fn node_module_paths_for_js(global: &JSGlobalObject, frame: &CallFrame) -> JsRes
     Ok(node_module_paths_js_value(&in_str, global, false))
 }
 
-#[unsafe(no_mangle)]
-extern "C" fn Resolver__propForRequireMainPaths(global: &JSGlobalObject) -> JSValue {
-    crate::mark_binding!();
-
-    node_module_paths_js_value(&BunString::static_("."), global, false)
-}
-
 // C++ callers pass a borrowed `const BunString*` (`Bun::toString`).
 #[unsafe(export_name = "Resolver__nodeModulePathsJSValue")]
 extern "C" fn node_module_paths_js_value(