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javascript.zig
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const std = @import("std");
const is_bindgen: bool = std.meta.globalOption("bindgen", bool) orelse false;
const StaticExport = @import("./bindings/static_export.zig");
const bun = @import("root").bun;
const string = bun.string;
const Output = bun.Output;
const Global = bun.Global;
const Environment = bun.Environment;
const strings = bun.strings;
const MutableString = bun.MutableString;
const stringZ = bun.stringZ;
const default_allocator = bun.default_allocator;
const StoredFileDescriptorType = bun.StoredFileDescriptorType;
const ErrorableString = bun.JSC.ErrorableString;
const Arena = @import("../mimalloc_arena.zig").Arena;
const C = bun.C;
const NetworkThread = @import("root").bun.HTTP.NetworkThread;
const IO = @import("root").bun.AsyncIO;
const Allocator = std.mem.Allocator;
const IdentityContext = @import("../identity_context.zig").IdentityContext;
const Fs = @import("../fs.zig");
const Resolver = @import("../resolver/resolver.zig");
const ast = @import("../import_record.zig");
const MacroEntryPoint = bun.bundler.MacroEntryPoint;
const ParseResult = bun.bundler.ParseResult;
const logger = @import("root").bun.logger;
const Api = @import("../api/schema.zig").Api;
const options = @import("../options.zig");
const Bundler = bun.Bundler;
const PluginRunner = bun.bundler.PluginRunner;
const ServerEntryPoint = bun.bundler.ServerEntryPoint;
const js_printer = bun.js_printer;
const js_parser = bun.js_parser;
const js_ast = bun.JSAst;
const http = @import("../bun_dev_http_server.zig");
const NodeFallbackModules = @import("../node_fallbacks.zig");
const ImportKind = ast.ImportKind;
const Analytics = @import("../analytics/analytics_thread.zig");
const ZigString = @import("root").bun.JSC.ZigString;
const Runtime = @import("../runtime.zig");
const Router = @import("./api/filesystem_router.zig");
const ImportRecord = ast.ImportRecord;
const DotEnv = @import("../env_loader.zig");
const PackageJSON = @import("../resolver/package_json.zig").PackageJSON;
const MacroRemap = @import("../resolver/package_json.zig").MacroMap;
const WebCore = @import("root").bun.JSC.WebCore;
const Request = WebCore.Request;
const Response = WebCore.Response;
const Headers = WebCore.Headers;
const String = bun.String;
const Fetch = WebCore.Fetch;
const FetchEvent = WebCore.FetchEvent;
const js = @import("root").bun.JSC.C;
const JSC = @import("root").bun.JSC;
const JSError = @import("./base.zig").JSError;
const d = @import("./base.zig").d;
const MarkedArrayBuffer = @import("./base.zig").MarkedArrayBuffer;
const getAllocator = @import("./base.zig").getAllocator;
const JSValue = @import("root").bun.JSC.JSValue;
const NewClass = @import("./base.zig").NewClass;
const Microtask = @import("root").bun.JSC.Microtask;
const JSGlobalObject = @import("root").bun.JSC.JSGlobalObject;
const ExceptionValueRef = @import("root").bun.JSC.ExceptionValueRef;
const JSPrivateDataPtr = @import("root").bun.JSC.JSPrivateDataPtr;
const ZigConsoleClient = @import("root").bun.JSC.ZigConsoleClient;
const Node = @import("root").bun.JSC.Node;
const ZigException = @import("root").bun.JSC.ZigException;
const ZigStackTrace = @import("root").bun.JSC.ZigStackTrace;
const ErrorableResolvedSource = @import("root").bun.JSC.ErrorableResolvedSource;
const ResolvedSource = @import("root").bun.JSC.ResolvedSource;
const JSPromise = @import("root").bun.JSC.JSPromise;
const JSInternalPromise = @import("root").bun.JSC.JSInternalPromise;
const JSModuleLoader = @import("root").bun.JSC.JSModuleLoader;
const JSPromiseRejectionOperation = @import("root").bun.JSC.JSPromiseRejectionOperation;
const Exception = @import("root").bun.JSC.Exception;
const ErrorableZigString = @import("root").bun.JSC.ErrorableZigString;
const ZigGlobalObject = @import("root").bun.JSC.ZigGlobalObject;
const VM = @import("root").bun.JSC.VM;
const JSFunction = @import("root").bun.JSC.JSFunction;
const Config = @import("./config.zig");
const URL = @import("../url.zig").URL;
const Bun = JSC.API.Bun;
const EventLoop = JSC.EventLoop;
const PendingResolution = @import("../resolver/resolver.zig").PendingResolution;
const ThreadSafeFunction = JSC.napi.ThreadSafeFunction;
const PackageManager = @import("../install/install.zig").PackageManager;
const IPC = @import("ipc.zig");
const ModuleLoader = JSC.ModuleLoader;
const FetchFlags = JSC.FetchFlags;
const TaggedPointerUnion = @import("../tagged_pointer.zig").TaggedPointerUnion;
const Task = JSC.Task;
const Blob = @import("../blob.zig");
pub const Buffer = MarkedArrayBuffer;
const Lock = @import("../lock.zig").Lock;
const BuildMessage = JSC.BuildMessage;
const ResolveMessage = JSC.ResolveMessage;
pub const OpaqueCallback = *const fn (current: ?*anyopaque) callconv(.C) void;
pub fn OpaqueWrap(comptime Context: type, comptime Function: fn (this: *Context) void) OpaqueCallback {
return struct {
pub fn callback(ctx: ?*anyopaque) callconv(.C) void {
var context: *Context = @as(*Context, @ptrCast(@alignCast(ctx.?)));
@call(.auto, Function, .{context});
}
}.callback;
}
pub const bun_file_import_path = "/node_modules.server.bun";
const SourceMap = @import("../sourcemap/sourcemap.zig");
const ParsedSourceMap = SourceMap.Mapping.ParsedSourceMap;
const MappingList = SourceMap.Mapping.List;
pub const SavedSourceMap = struct {
pub const vlq_offset = 24;
// For bun.js, we store the number of mappings and how many bytes the final list is at the beginning of the array
// The first 8 bytes are the length of the array
// The second 8 bytes are the number of mappings
pub const SavedMappings = struct {
data: [*]u8,
pub fn vlq(this: SavedMappings) []u8 {
return this.data[vlq_offset..this.len()];
}
pub inline fn len(this: SavedMappings) usize {
return @as(u64, @bitCast(this.data[0..8].*));
}
pub fn deinit(this: SavedMappings) void {
default_allocator.free(this.data[0..this.len()]);
}
pub fn toMapping(this: SavedMappings, allocator: Allocator, path: string) anyerror!ParsedSourceMap {
const result = SourceMap.Mapping.parse(
allocator,
this.data[vlq_offset..this.len()],
@as(usize, @bitCast(this.data[8..16].*)),
1,
@as(usize, @bitCast(this.data[16..24].*)),
);
switch (result) {
.fail => |fail| {
if (Output.enable_ansi_colors_stderr) {
try fail.toData(path).writeFormat(
Output.errorWriter(),
logger.Kind.warn,
true,
false,
);
} else {
try fail.toData(path).writeFormat(
Output.errorWriter(),
logger.Kind.warn,
false,
false,
);
}
return fail.err;
},
.success => |success| {
return success;
},
}
}
};
pub const Value = TaggedPointerUnion(.{ ParsedSourceMap, SavedMappings });
pub const HashTable = std.HashMap(u64, *anyopaque, IdentityContext(u64), 80);
/// This is a pointer to the map located on the VirtualMachine struct
map: *HashTable,
mutex: bun.Lock = bun.Lock.init(),
pub fn onSourceMapChunk(this: *SavedSourceMap, chunk: SourceMap.Chunk, source: logger.Source) anyerror!void {
try this.putMappings(source, chunk.buffer);
}
pub const SourceMapHandler = js_printer.SourceMapHandler.For(SavedSourceMap, onSourceMapChunk);
pub fn deinit(this: *SavedSourceMap) void {
{
this.mutex.lock();
var iter = this.map.valueIterator();
while (iter.next()) |val| {
var value = Value.from(val.*);
if (value.get(ParsedSourceMap)) |source_map_| {
var source_map: *ParsedSourceMap = source_map_;
source_map.deinit(default_allocator);
} else if (value.get(SavedMappings)) |saved_mappings| {
var saved = SavedMappings{ .data = @as([*]u8, @ptrCast(saved_mappings)) };
saved.deinit();
}
}
this.mutex.unlock();
}
this.map.deinit();
}
pub fn putMappings(this: *SavedSourceMap, source: logger.Source, mappings: MutableString) !void {
this.mutex.lock();
defer this.mutex.unlock();
var entry = try this.map.getOrPut(bun.hash(source.path.text));
if (entry.found_existing) {
var value = Value.from(entry.value_ptr.*);
if (value.get(ParsedSourceMap)) |source_map_| {
var source_map: *ParsedSourceMap = source_map_;
source_map.deinit(default_allocator);
} else if (value.get(SavedMappings)) |saved_mappings| {
var saved = SavedMappings{ .data = @as([*]u8, @ptrCast(saved_mappings)) };
saved.deinit();
}
}
entry.value_ptr.* = Value.init(bun.cast(*SavedMappings, mappings.list.items.ptr)).ptr();
}
pub fn get(this: *SavedSourceMap, path: string) ?ParsedSourceMap {
var mapping = this.map.getEntry(bun.hash(path)) orelse return null;
switch (Value.from(mapping.value_ptr.*).tag()) {
Value.Tag.ParsedSourceMap => {
return Value.from(mapping.value_ptr.*).as(ParsedSourceMap).*;
},
Value.Tag.SavedMappings => {
var saved = SavedMappings{ .data = @as([*]u8, @ptrCast(Value.from(mapping.value_ptr.*).as(ParsedSourceMap))) };
defer saved.deinit();
var result = default_allocator.create(ParsedSourceMap) catch unreachable;
result.* = saved.toMapping(default_allocator, path) catch {
_ = this.map.remove(mapping.key_ptr.*);
return null;
};
mapping.value_ptr.* = Value.init(result).ptr();
return result.*;
},
else => return null,
}
}
pub fn resolveMapping(
this: *SavedSourceMap,
path: []const u8,
line: i32,
column: i32,
) ?SourceMap.Mapping {
this.mutex.lock();
defer this.mutex.unlock();
const parsed_mappings = this.get(path) orelse return null;
return SourceMap.Mapping.find(parsed_mappings.mappings, line, column);
}
};
const uws = @import("root").bun.uws;
pub export fn Bun__getDefaultGlobal() *JSGlobalObject {
return JSC.VirtualMachine.get().global;
}
pub export fn Bun__getVM() *JSC.VirtualMachine {
return JSC.VirtualMachine.get();
}
pub export fn Bun__drainMicrotasks() void {
JSC.VirtualMachine.get().eventLoop().tick();
}
export fn Bun__readOriginTimer(vm: *JSC.VirtualMachine) u64 {
return vm.origin_timer.read();
}
export fn Bun__readOriginTimerStart(vm: *JSC.VirtualMachine) f64 {
// timespce to milliseconds
return @as(f64, @floatCast((@as(f64, @floatFromInt(vm.origin_timestamp)) + JSC.VirtualMachine.origin_relative_epoch) / 1_000_000.0));
}
pub export fn Bun__GlobalObject__hasIPC(global: *JSC.JSGlobalObject) bool {
return global.bunVM().ipc != null;
}
pub export fn Bun__Process__send(
globalObject: *JSGlobalObject,
callFrame: *JSC.CallFrame,
) JSValue {
JSC.markBinding(@src());
if (callFrame.argumentsCount() < 1) {
globalObject.throwInvalidArguments("process.send requires at least one argument", .{});
return .zero;
}
var vm = globalObject.bunVM();
if (vm.ipc) |ipc| {
const fd = ipc.socket.fd();
const success = IPC.serializeJSValueForSubprocess(
globalObject,
callFrame.argument(0),
fd,
);
return if (success) .undefined else .zero;
} else {
globalObject.throw("IPC Socket is no longer open.", .{});
return .zero;
}
}
pub export fn Bun__isBunMain(globalObject: *JSGlobalObject, input_ptr: [*]const u8, input_len: usize) bool {
return strings.eql(globalObject.bunVM().main, input_ptr[0..input_len]);
}
pub export fn Bun__Process__disconnect(
globalObject: *JSGlobalObject,
callFrame: *JSC.CallFrame,
) JSValue {
_ = callFrame;
_ = globalObject;
return .undefined;
}
/// This function is called on the main thread
/// The bunVM() call will assert this
pub export fn Bun__queueTask(global: *JSGlobalObject, task: *JSC.CppTask) void {
global.bunVM().eventLoop().enqueueTask(Task.init(task));
}
pub export fn Bun__queueTaskWithTimeout(global: *JSGlobalObject, task: *JSC.CppTask, milliseconds: i32) void {
global.bunVM().eventLoop().enqueueTaskWithTimeout(Task.init(task), milliseconds);
}
pub export fn Bun__reportUnhandledError(globalObject: *JSGlobalObject, value: JSValue) callconv(.C) JSValue {
var jsc_vm = globalObject.bunVM();
jsc_vm.onUnhandledError(globalObject, value);
return JSC.JSValue.jsUndefined();
}
/// This function is called on another thread
/// The main difference: we need to allocate the task & wakeup the thread
/// We can avoid that if we run it from the main thread.
pub export fn Bun__queueTaskConcurrently(global: *JSGlobalObject, task: *JSC.CppTask) void {
var concurrent = bun.default_allocator.create(JSC.ConcurrentTask) catch unreachable;
concurrent.* = JSC.ConcurrentTask{
.task = Task.init(task),
.auto_delete = true,
};
global.bunVMConcurrently().eventLoop().enqueueTaskConcurrent(concurrent);
}
pub export fn Bun__handleRejectedPromise(global: *JSGlobalObject, promise: *JSC.JSPromise) void {
const result = promise.result(global.vm());
var jsc_vm = global.bunVM();
// this seems to happen in some cases when GC is running
if (result == .zero)
return;
jsc_vm.onUnhandledError(global, result);
jsc_vm.autoGarbageCollect();
}
pub export fn Bun__onDidAppendPlugin(jsc_vm: *VirtualMachine, globalObject: *JSGlobalObject) void {
if (jsc_vm.plugin_runner != null) {
return;
}
jsc_vm.plugin_runner = PluginRunner{
.global_object = globalObject,
.allocator = jsc_vm.allocator,
};
jsc_vm.bundler.linker.plugin_runner = &jsc_vm.plugin_runner.?;
}
pub const ExitHandler = struct {
exit_code: u8 = 0,
pub export fn Bun__getExitCode(vm: *VirtualMachine) u8 {
return vm.exit_handler.exit_code;
}
pub export fn Bun__setExitCode(vm: *VirtualMachine, code: u8) void {
vm.exit_handler.exit_code = code;
}
extern fn Process__dispatchOnBeforeExit(*JSC.JSGlobalObject, code: u8) void;
extern fn Process__dispatchOnExit(*JSC.JSGlobalObject, code: u8) void;
extern fn Bun__closeAllSQLiteDatabasesForTermination() void;
pub fn dispatchOnExit(this: *ExitHandler) void {
JSC.markBinding(@src());
var vm = @fieldParentPtr(VirtualMachine, "exit_handler", this);
Process__dispatchOnExit(vm.global, this.exit_code);
if (vm.isMainThread())
Bun__closeAllSQLiteDatabasesForTermination();
}
pub fn dispatchOnBeforeExit(this: *ExitHandler) void {
JSC.markBinding(@src());
var vm = @fieldParentPtr(VirtualMachine, "exit_handler", this);
Process__dispatchOnBeforeExit(vm.global, this.exit_code);
}
};
pub const WebWorker = @import("./web_worker.zig").WebWorker;
pub const ImportWatcher = union(enum) {
none: void,
hot: *HotReloader.Watcher,
watch: *WatchReloader.Watcher,
pub fn start(this: ImportWatcher) !void {
switch (this) {
inline .hot => |watcher| try watcher.start(),
inline .watch => |watcher| try watcher.start(),
else => {},
}
}
pub inline fn watchlist(this: ImportWatcher) Watcher.WatchListArray {
return switch (this) {
inline .hot, .watch => |wacher| wacher.watchlist,
else => .{},
};
}
pub inline fn indexOf(this: ImportWatcher, hash: Watcher.HashType) ?u32 {
return switch (this) {
inline .hot, .watch => |wacher| wacher.indexOf(hash),
else => null,
};
}
pub inline fn addFile(
this: ImportWatcher,
fd: StoredFileDescriptorType,
file_path: string,
hash: Watcher.HashType,
loader: options.Loader,
dir_fd: StoredFileDescriptorType,
package_json: ?*PackageJSON,
comptime copy_file_path: bool,
) !void {
switch (this) {
inline .hot, .watch => |wacher| try wacher.addFile(fd, file_path, hash, loader, dir_fd, package_json, copy_file_path),
else => {},
}
}
};
/// TODO: rename this to ScriptExecutionContext
/// This is the shared global state for a single JS instance execution
/// Today, Bun is one VM per thread, so the name "VirtualMachine" sort of makes sense
/// However, that may change in the future
pub const VirtualMachine = struct {
global: *JSGlobalObject,
allocator: std.mem.Allocator,
has_loaded_constructors: bool = false,
bundler: Bundler,
bun_watcher: ImportWatcher = .{ .none = {} },
console: *ZigConsoleClient,
log: *logger.Log,
main: string = "",
main_hash: u32 = 0,
process: js.JSObjectRef = null,
blobs: ?*Blob.Group = null,
flush_list: std.ArrayList(string),
entry_point: ServerEntryPoint = undefined,
origin: URL = URL{},
node_fs: ?*Node.NodeFS = null,
timer: Bun.Timer = Bun.Timer{},
event_loop_handle: ?*uws.Loop = null,
pending_unref_counter: i32 = 0,
preload: []const string = &[_][]const u8{},
unhandled_pending_rejection_to_capture: ?*JSC.JSValue = null,
standalone_module_graph: ?*bun.StandaloneModuleGraph = null,
hot_reload: bun.CLI.Command.HotReload = .none,
jsc: *JSC.VM = undefined,
/// hide bun:wrap from stack traces
/// bun:wrap is very noisy
hide_bun_stackframes: bool = true,
is_printing_plugin: bool = false,
plugin_runner: ?PluginRunner = null,
is_main_thread: bool = false,
last_reported_error_for_dedupe: JSValue = .zero,
exit_handler: ExitHandler = .{},
/// Do not access this field directly
/// It exists in the VirtualMachine struct so that
/// we don't accidentally make a stack copy of it
/// only use it through
/// source_mappings
saved_source_map_table: SavedSourceMap.HashTable = undefined,
arena: *Arena = undefined,
has_loaded: bool = false,
transpiled_count: usize = 0,
resolved_count: usize = 0,
had_errors: bool = false,
macros: MacroMap,
macro_entry_points: std.AutoArrayHashMap(i32, *MacroEntryPoint),
macro_mode: bool = false,
no_macros: bool = false,
has_any_macro_remappings: bool = false,
is_from_devserver: bool = false,
has_enabled_macro_mode: bool = false,
/// Used by bun:test to set global hooks for beforeAll, beforeEach, etc.
is_in_preload: bool = false,
transpiler_store: JSC.RuntimeTranspilerStore,
after_event_loop_callback_ctx: ?*anyopaque = null,
after_event_loop_callback: ?OpaqueCallback = null,
/// The arguments used to launch the process _after_ the script name and bun and any flags applied to Bun
/// "bun run foo --bar"
/// ["--bar"]
/// "bun run foo baz --bar"
/// ["baz", "--bar"]
/// "bun run foo
/// []
/// "bun foo --bar"
/// ["--bar"]
/// "bun foo baz --bar"
/// ["baz", "--bar"]
/// "bun foo
/// []
argv: []const []const u8 = &[_][]const u8{"bun"},
origin_timer: std.time.Timer = undefined,
origin_timestamp: u64 = 0,
macro_event_loop: EventLoop = EventLoop{},
regular_event_loop: EventLoop = EventLoop{},
event_loop: *EventLoop = undefined,
ref_strings: JSC.RefString.Map = undefined,
ref_strings_mutex: Lock = undefined,
file_blobs: JSC.WebCore.Blob.Store.Map,
source_mappings: SavedSourceMap = undefined,
active_tasks: usize = 0,
rare_data: ?*JSC.RareData = null,
is_us_loop_entered: bool = false,
pending_internal_promise: *JSC.JSInternalPromise = undefined,
auto_install_dependencies: bool = false,
onUnhandledRejection: *const OnUnhandledRejection = defaultOnUnhandledRejection,
onUnhandledRejectionCtx: ?*anyopaque = null,
unhandled_error_counter: usize = 0,
on_exception: ?*const OnException = null,
modules: ModuleLoader.AsyncModule.Queue = .{},
aggressive_garbage_collection: GCLevel = GCLevel.none,
parser_arena: ?@import("root").bun.ArenaAllocator = null,
gc_controller: JSC.GarbageCollectionController = .{},
worker: ?*JSC.WebWorker = null,
ipc: ?*IPCInstance = null,
debugger: ?Debugger = null,
has_started_debugger: bool = false,
pub const OnUnhandledRejection = fn (*VirtualMachine, globalObject: *JSC.JSGlobalObject, JSC.JSValue) void;
pub const OnException = fn (*ZigException) void;
pub fn isMainThread(this: *const VirtualMachine) bool {
return this.worker == null;
}
pub fn isInspectorEnabled(this: *const VirtualMachine) bool {
return this.debugger != null;
}
pub fn setOnException(this: *VirtualMachine, callback: *const OnException) void {
this.on_exception = callback;
}
pub fn clearOnException(this: *VirtualMachine) void {
this.on_exception = null;
}
const VMHolder = struct {
pub threadlocal var vm: ?*VirtualMachine = null;
};
pub inline fn get() *VirtualMachine {
return VMHolder.vm.?;
}
pub fn mimeType(this: *VirtualMachine, str: []const u8) ?bun.HTTP.MimeType {
return this.rareData().mimeTypeFromString(this.allocator, str);
}
pub fn onAfterEventLoop(this: *VirtualMachine) void {
if (this.after_event_loop_callback) |cb| {
var ctx = this.after_event_loop_callback_ctx;
this.after_event_loop_callback = null;
this.after_event_loop_callback_ctx = null;
cb(ctx);
}
}
pub fn isEventLoopAlive(vm: *const VirtualMachine) bool {
return vm.active_tasks > 0 or
vm.event_loop_handle.?.active > 0 or
vm.event_loop.tasks.count > 0;
}
const SourceMapHandlerGetter = struct {
vm: *VirtualMachine,
printer: *js_printer.BufferPrinter,
pub fn get(this: *SourceMapHandlerGetter) js_printer.SourceMapHandler {
if (this.vm.debugger == null) {
return SavedSourceMap.SourceMapHandler.init(&this.vm.source_mappings);
}
return js_printer.SourceMapHandler.For(SourceMapHandlerGetter, onChunk).init(this);
}
/// When the inspector is enabled, we want to generate an inline sourcemap.
/// And, for now, we also store it in source_mappings like normal
/// This is hideously expensive memory-wise...
pub fn onChunk(this: *SourceMapHandlerGetter, chunk: SourceMap.Chunk, source: logger.Source) anyerror!void {
var temp_json_buffer = bun.MutableString.initEmpty(bun.default_allocator);
defer temp_json_buffer.deinit();
temp_json_buffer = try chunk.printSourceMapContentsAtOffset(source, temp_json_buffer, true, SavedSourceMap.vlq_offset, true);
const source_map_url_prefix_start = "//# sourceMappingURL=data:application/json;base64,";
// TODO: do we need to %-encode the path?
const source_url_len = source.path.text.len;
const source_mapping_url = "\n//# sourceURL=";
const prefix_len = source_map_url_prefix_start.len + source_mapping_url.len + source_url_len;
try this.vm.source_mappings.putMappings(source, chunk.buffer);
const encode_len = bun.base64.encodeLen(temp_json_buffer.list.items);
try this.printer.ctx.buffer.growIfNeeded(encode_len + prefix_len + 2);
this.printer.ctx.buffer.appendAssumeCapacity("\n" ++ source_map_url_prefix_start);
_ = bun.base64.encode(this.printer.ctx.buffer.list.items.ptr[this.printer.ctx.buffer.len()..this.printer.ctx.buffer.list.capacity], temp_json_buffer.list.items);
this.printer.ctx.buffer.list.items.len += encode_len;
this.printer.ctx.buffer.appendAssumeCapacity(source_mapping_url);
// TODO: do we need to %-encode the path?
this.printer.ctx.buffer.appendAssumeCapacity(source.path.text);
try this.printer.ctx.buffer.append("\n");
}
};
pub inline fn sourceMapHandler(this: *VirtualMachine, printer: *js_printer.BufferPrinter) SourceMapHandlerGetter {
return SourceMapHandlerGetter{
.vm = this,
.printer = printer,
};
}
pub const GCLevel = enum(u3) {
none = 0,
mild = 1,
aggressive = 2,
};
pub threadlocal var is_main_thread_vm: bool = false;
pub const UnhandledRejectionScope = struct {
ctx: ?*anyopaque = null,
onUnhandledRejection: *const OnUnhandledRejection = undefined,
count: usize = 0,
pub fn apply(this: *UnhandledRejectionScope, vm: *JSC.VirtualMachine) void {
vm.onUnhandledRejection = this.onUnhandledRejection;
vm.onUnhandledRejectionCtx = this.ctx;
vm.unhandled_error_counter = this.count;
}
};
pub fn onQuietUnhandledRejectionHandler(this: *VirtualMachine, _: *JSC.JSGlobalObject, _: JSC.JSValue) void {
this.unhandled_error_counter += 1;
}
pub fn onQuietUnhandledRejectionHandlerCaptureValue(this: *VirtualMachine, _: *JSC.JSGlobalObject, value: JSC.JSValue) void {
this.unhandled_error_counter += 1;
value.ensureStillAlive();
if (this.unhandled_pending_rejection_to_capture) |ptr| {
ptr.* = value;
}
}
pub fn unhandledRejectionScope(this: *VirtualMachine) UnhandledRejectionScope {
return .{
.onUnhandledRejection = this.onUnhandledRejection,
.ctx = this.onUnhandledRejectionCtx,
.count = this.unhandled_error_counter,
};
}
pub fn resetUnhandledRejection(this: *VirtualMachine) void {
this.onUnhandledRejection = defaultOnUnhandledRejection;
}
pub fn loadExtraEnv(this: *VirtualMachine) void {
var map = this.bundler.env.map;
if (map.get("BUN_SHOW_BUN_STACKFRAMES") != null) {
this.hide_bun_stackframes = false;
}
if (map.map.fetchSwapRemove("BUN_INTERNAL_IPC_FD")) |kv| {
if (std.fmt.parseInt(i32, kv.value.value, 10) catch null) |fd| {
this.initIPCInstance(fd);
} else {
Output.printErrorln("Failed to parse BUN_INTERNAL_IPC_FD", .{});
}
}
if (map.get("BUN_GARBAGE_COLLECTOR_LEVEL")) |gc_level| {
if (strings.eqlComptime(gc_level, "1")) {
this.aggressive_garbage_collection = .mild;
} else if (strings.eqlComptime(gc_level, "2")) {
this.aggressive_garbage_collection = .aggressive;
}
}
}
pub fn onUnhandledError(this: *JSC.VirtualMachine, globalObject: *JSC.JSGlobalObject, value: JSC.JSValue) void {
this.unhandled_error_counter += 1;
this.onUnhandledRejection(this, globalObject, value);
}
pub fn defaultOnUnhandledRejection(this: *JSC.VirtualMachine, _: *JSC.JSGlobalObject, value: JSC.JSValue) void {
this.runErrorHandler(value, null);
}
pub inline fn packageManager(this: *VirtualMachine) *PackageManager {
return this.bundler.getPackageManager();
}
pub fn garbageCollect(this: *const VirtualMachine, sync: bool) JSValue {
@setCold(true);
Global.mimalloc_cleanup(false);
if (sync)
return this.global.vm().runGC(true);
this.global.vm().collectAsync();
return JSValue.jsNumber(this.global.vm().heapSize());
}
pub inline fn autoGarbageCollect(this: *const VirtualMachine) void {
if (this.aggressive_garbage_collection != .none) {
_ = this.garbageCollect(this.aggressive_garbage_collection == .aggressive);
}
}
pub fn reload(this: *VirtualMachine) void {
Output.debug("Reloading...", .{});
if (this.hot_reload == .watch) {
Output.flush();
bun.reloadProcess(bun.default_allocator, !strings.eqlComptime(this.bundler.env.map.get("BUN_CONFIG_NO_CLEAR_TERMINAL_ON_RELOAD") orelse "0", "true"));
}
if (!strings.eqlComptime(this.bundler.env.map.get("BUN_CONFIG_NO_CLEAR_TERMINAL_ON_RELOAD") orelse "0", "true")) {
Output.flush();
Output.disableBuffering();
Output.resetTerminalAll();
Output.enableBuffering();
}
this.global.reload();
this.pending_internal_promise = this.reloadEntryPoint(this.main) catch @panic("Failed to reload");
}
pub fn io(this: *VirtualMachine) *IO {
if (this.io_ == null) {
this.io_ = IO.init(this) catch @panic("Failed to initialize IO");
}
return &this.io_.?;
}
pub inline fn nodeFS(this: *VirtualMachine) *Node.NodeFS {
return this.node_fs orelse brk: {
this.node_fs = bun.default_allocator.create(Node.NodeFS) catch unreachable;
this.node_fs.?.* = Node.NodeFS{
// only used when standalone module graph is enabled
.vm = if (this.standalone_module_graph != null) this else null,
};
break :brk this.node_fs.?;
};
}
pub inline fn rareData(this: *VirtualMachine) *JSC.RareData {
return this.rare_data orelse brk: {
this.rare_data = this.allocator.create(JSC.RareData) catch unreachable;
this.rare_data.?.* = .{};
break :brk this.rare_data.?;
};
}
pub inline fn eventLoop(this: *VirtualMachine) *EventLoop {
return this.event_loop;
}
pub fn prepareLoop(_: *VirtualMachine) void {}
pub fn enterUWSLoop(this: *VirtualMachine) void {
var loop = this.event_loop_handle.?;
loop.run();
}
pub fn onBeforeExit(this: *VirtualMachine) void {
this.exit_handler.dispatchOnBeforeExit();
var dispatch = false;
while (true) {
while (this.isEventLoopAlive()) : (dispatch = true) {
this.tick();
this.eventLoop().autoTickActive();
}
if (dispatch) {
this.exit_handler.dispatchOnBeforeExit();
dispatch = false;
if (this.isEventLoopAlive()) continue;
}
break;
}
}
pub fn onExit(this: *VirtualMachine) void {
this.exit_handler.dispatchOnExit();
var rare_data = this.rare_data orelse return;
var hook = rare_data.cleanup_hook orelse return;
hook.execute();
while (hook.next) |next| {
next.execute();
hook = next;
}
}
pub fn nextAsyncTaskID(this: *VirtualMachine) u64 {
var debugger: *Debugger = &(this.debugger orelse return 0);
debugger.next_debugger_id +%= 1;
return debugger.next_debugger_id;
}
pub fn hotMap(this: *VirtualMachine) ?*JSC.RareData.HotMap {
if (this.hot_reload != .hot) {
return null;
}
return this.rareData().hotMap(this.allocator);
}
pub var has_created_debugger: bool = false;
pub const Debugger = struct {
path_or_port: ?[]const u8 = null,
unix: []const u8 = "",
script_execution_context_id: u32 = 0,
next_debugger_id: u64 = 1,
poll_ref: JSC.PollRef = .{},
wait_for_connection: bool = false,
set_breakpoint_on_first_line: bool = false,
const debug = Output.scoped(.DEBUGGER, false);
extern "C" fn Bun__createJSDebugger(*JSC.JSGlobalObject) u32;
extern "C" fn Bun__ensureDebugger(u32, bool) void;
extern "C" fn Bun__startJSDebuggerThread(*JSC.JSGlobalObject, u32, *bun.String) void;
var futex_atomic: std.atomic.Atomic(u32) = undefined;
pub fn create(this: *VirtualMachine, globalObject: *JSGlobalObject) !void {
debug("create", .{});
JSC.markBinding(@src());
if (has_created_debugger) return;
has_created_debugger = true;
var debugger = &this.debugger.?;
debugger.script_execution_context_id = Bun__createJSDebugger(globalObject);
if (!this.has_started_debugger) {
this.has_started_debugger = true;
futex_atomic = std.atomic.Atomic(u32).init(0);
var thread = try std.Thread.spawn(.{}, startJSDebuggerThread, .{this});
thread.detach();
}
this.eventLoop().ensureWaker();
if (debugger.wait_for_connection) {
debugger.poll_ref.ref(this);
}
debug("spin", .{});
while (futex_atomic.load(.Monotonic) > 0) std.Thread.Futex.wait(&futex_atomic, 1);
if (comptime Environment.allow_assert)
debug("waitForDebugger: {}", .{Output.ElapsedFormatter{
.colors = Output.enable_ansi_colors_stderr,
.duration_ns = @truncate(@as(u128, @intCast(std.time.nanoTimestamp() - bun.CLI.start_time))),
}});
Bun__ensureDebugger(debugger.script_execution_context_id, debugger.wait_for_connection);
while (debugger.wait_for_connection) {
this.eventLoop().tick();
if (debugger.wait_for_connection)
this.eventLoop().autoTickActive();
}
}
pub fn startJSDebuggerThread(other_vm: *VirtualMachine) void {
var arena = bun.MimallocArena.init() catch unreachable;
Output.Source.configureNamedThread("Debugger");
debug("startJSDebuggerThread", .{});
JSC.markBinding(@src());
var vm = JSC.VirtualMachine.init(.{
.allocator = arena.allocator(),
.args = std.mem.zeroes(Api.TransformOptions),
.store_fd = false,
}) catch @panic("Failed to create Debugger VM");
vm.allocator = arena.allocator();
vm.arena = &arena;
vm.bundler.configureDefines() catch @panic("Failed to configure defines");
vm.is_main_thread = false;
vm.eventLoop().ensureWaker();
vm.global.vm().holdAPILock(other_vm, @ptrCast(&start));
}
pub export fn Debugger__didConnect() void {
var this = VirtualMachine.get();
std.debug.assert(this.debugger.?.wait_for_connection);
this.debugger.?.wait_for_connection = false;
this.debugger.?.poll_ref.unref(this);
}
fn start(other_vm: *VirtualMachine) void {
JSC.markBinding(@src());
var this = VirtualMachine.get();
var debugger = other_vm.debugger.?;
if (debugger.unix.len > 0) {
var url = bun.String.create(debugger.unix);
Bun__startJSDebuggerThread(this.global, debugger.script_execution_context_id, &url);
}
if (debugger.path_or_port) |path_or_port| {
var url = bun.String.create(path_or_port);
Bun__startJSDebuggerThread(this.global, debugger.script_execution_context_id, &url);
}
this.global.handleRejectedPromises();
if (this.log.msgs.items.len > 0) {
if (Output.enable_ansi_colors) {
this.log.printForLogLevelWithEnableAnsiColors(Output.errorWriter(), true) catch {};
} else {
this.log.printForLogLevelWithEnableAnsiColors(Output.errorWriter(), false) catch {};
}
Output.prettyErrorln("\n", .{});
Output.flush();
}
debug("wake", .{});
futex_atomic.store(0, .Monotonic);
std.Thread.Futex.wake(&futex_atomic, 1);
this.eventLoop().tick();
while (true) {
while (this.isEventLoopAlive()) {
this.tick();
this.eventLoop().autoTickActive();
}
this.eventLoop().tickPossiblyForever();
}
}
};
pub inline fn enqueueTask(this: *VirtualMachine, task: Task) void {
this.eventLoop().enqueueTask(task);
}
pub inline fn enqueueTaskConcurrent(this: *VirtualMachine, task: *JSC.ConcurrentTask) void {
this.eventLoop().enqueueTaskConcurrent(task);
}