Fixes #6929 (#7059)

* Fixes #6929

* TIL macOS symbols are case insensitive

---------

Co-authored-by: Jarred Sumner <709451+Jarred-Sumner@users.noreply.github.com>

src/__global.zig

@@ -72,9 +72,27 @@ pub fn setThreadName(name: StringTypes.stringZ) void {
     }
 }
 
+const ExitFn = *const fn () callconv(.C) void;
+
+var on_exit_callbacks = std.ArrayListUnmanaged(ExitFn){};
+export fn Bun__atexit(function: ExitFn) void {
+    if (std.mem.indexOfScalar(ExitFn, on_exit_callbacks.items, function) == null) {
+        on_exit_callbacks.append(bun.default_allocator, function) catch {};
+    }
+}
+
+pub fn runExitCallbacks() void {
+    for (on_exit_callbacks.items) |callback| {
+        callback();
+    }
+    on_exit_callbacks.items.len = 0;
+}
+
 /// Flushes stdout and stderr and exits with the given code.
 pub fn exit(code: u8) noreturn {
+    runExitCallbacks();
     Output.flush();
+    std.mem.doNotOptimizeAway(&Bun__atexit);
     std.c._exit(code);
 }
 

src/bun.js/bindings/wtf-bindings.cpp

@@ -94,6 +94,8 @@ static void uv__tty_make_raw(struct termios* tio)
 
 #endif
 
+extern "C" void Bun__atexit(void (*func)(void));
+
 extern "C" int Bun__ttySetMode(int fd, int mode)
 {
 #if !OS(WINDOWS)
@@ -138,7 +140,7 @@ extern "C" int Bun__ttySetMode(int fd, int mode)
         tmp.c_cc[VTIME] = 0;
 
         std::call_once(reset_once_flag, [] {
-            atexit([] {
+            Bun__atexit([] {
                 uv_tty_reset_mode();
             });
         });
@@ -147,7 +149,7 @@ extern "C" int Bun__ttySetMode(int fd, int mode)
         uv__tty_make_raw(&tmp);
 
         std::call_once(reset_once_flag, [] {
-            atexit([] {
+            Bun__atexit([] {
                 uv_tty_reset_mode();
             });
         });

src/bun.js/javascript.zig

@@ -407,8 +407,9 @@ pub const ExitHandler = struct {
         JSC.markBinding(@src());
         var vm = @fieldParentPtr(VirtualMachine, "exit_handler", this);
         Process__dispatchOnExit(vm.global, this.exit_code);
-        if (vm.isMainThread())
+        if (vm.isMainThread()) {
             Bun__closeAllSQLiteDatabasesForTermination();
+        }
     }
 
     pub fn dispatchOnBeforeExit(this: *ExitHandler) void {

src/report.zig

@@ -312,7 +312,7 @@ pub noinline fn handleCrash(signal: i32, addr: usize) void {
     if (error_return_trace) |trace| {
         std.debug.dumpStackTrace(trace.*);
     }
-
+    Global.runExitCallbacks();
     std.c._exit(128 + @as(u8, @truncate(@as(u8, @intCast(@max(signal, 0))))));
 }
 

test/cli/run/fixture-tty.js

@@ -0,0 +1,18 @@
+const onlyCheck = process.env.ONLY_CHECK_TTY === "0";
+import { dlopen, ptr } from "bun:ffi";
+
+const suffix = process.platform === "darwin" ? "dylib" : "so.6";
+const { tcgetattr, tcsetattr } = dlopen(`libc.${suffix}`, {
+  "tcgetattr": {
+    "args": ["int", "pointer"],
+    "result": "int",
+  },
+}).symbols;
+var termios = new Buffer(256);
+var dataView = new DataView(termios.buffer);
+const rc = tcgetattr(0, dataView);
+if (rc === 0) {
+  throw new Error("tcgetattr failed");
+}
+
+await Bun.write(1, termios.toString("hex"));