link-test: add matching test case for unwind info when MH_SUBSECTIONS_VIA_SYMBOLS is not set

test/link.zig

@@ -96,6 +96,10 @@ pub const cases = [_]Case{
         .build_root = "test/link/macho/bugs/16308",
         .import = @import("link/macho/bugs/16308/build.zig"),
     },
+    .{
+        .build_root = "test/link/macho/bugs/16628",
+        .import = @import("link/macho/bugs/16628/build.zig"),
+    },
     .{
         .build_root = "test/link/macho/dead_strip",
         .import = @import("link/macho/dead_strip/build.zig"),

test/link/macho/bugs/16628/a_arm64.s

@@ -0,0 +1,37 @@
+.globl _foo
+.align 4
+_foo: 
+  .cfi_startproc
+  stp     x29, x30, [sp, #-32]!
+  .cfi_def_cfa_offset 32
+  .cfi_offset w30, -24
+  .cfi_offset w29, -32
+  mov x29, sp
+  .cfi_def_cfa w29, 32
+  bl      _bar
+  ldp     x29, x30, [sp], #32
+  .cfi_restore w29
+  .cfi_restore w30
+  .cfi_def_cfa_offset 0
+  ret
+  .cfi_endproc
+
+.globl _bar
+.align 4
+_bar:
+  .cfi_startproc
+  sub     sp, sp, #32
+  .cfi_def_cfa_offset -32
+  stp     x29, x30, [sp, #16]
+  .cfi_offset w30, -24
+  .cfi_offset w29, -32
+  mov x29, sp
+  .cfi_def_cfa w29, 32
+  mov     w0, #4
+  ldp     x29, x30, [sp, #16]
+  .cfi_restore w29
+  .cfi_restore w30
+  add     sp, sp, #32
+  .cfi_def_cfa_offset 0
+  ret
+  .cfi_endproc

test/link/macho/bugs/16628/a_x64.s

@@ -0,0 +1,29 @@
+.globl _foo
+_foo: 
+  .cfi_startproc
+  push    %rbp
+  .cfi_def_cfa_offset 8
+  .cfi_offset %rbp, -8
+  mov     %rsp, %rbp
+  .cfi_def_cfa_register %rbp
+  call    _bar
+  pop     %rbp
+  .cfi_restore %rbp
+  .cfi_def_cfa_offset 0
+  ret
+  .cfi_endproc
+
+.globl _bar
+_bar:
+  .cfi_startproc
+  push     %rbp
+  .cfi_def_cfa_offset 8
+  .cfi_offset %rbp, -8
+  mov     %rsp, %rbp
+  .cfi_def_cfa_register %rbp
+  mov     $4, %rax
+  pop     %rbp
+  .cfi_restore %rbp
+  .cfi_def_cfa_offset 0
+  ret
+  .cfi_endproc

test/link/macho/bugs/16628/build.zig

@@ -0,0 +1,42 @@
+const std = @import("std");
+const builtin = @import("builtin");
+
+pub const requires_symlinks = true;
+pub const requires_macos_sdk = false;
+
+pub fn build(b: *std.Build) void {
+    const test_step = b.step("test", "Test it");
+    b.default_step = test_step;
+
+    add(b, test_step, .Debug);
+    add(b, test_step, .ReleaseFast);
+    add(b, test_step, .ReleaseSmall);
+    add(b, test_step, .ReleaseSafe);
+}
+
+fn add(b: *std.Build, test_step: *std.Build.Step, optimize: std.builtin.OptimizeMode) void {
+    const target: std.zig.CrossTarget = .{ .os_tag = .macos };
+
+    const exe = b.addExecutable(.{
+        .name = "test",
+        .optimize = optimize,
+        .target = target,
+    });
+    exe.addCSourceFile(.{ .file = .{ .path = "main.c" }, .flags = &[0][]const u8{} });
+    switch (builtin.cpu.arch) {
+        .aarch64 => {
+            exe.addCSourceFile(.{ .file = .{ .path = "a_arm64.s" }, .flags = &[0][]const u8{} });
+        },
+        .x86_64 => {
+            exe.addCSourceFile(.{ .file = .{ .path = "a_x64.s" }, .flags = &[0][]const u8{} });
+        },
+        else => unreachable,
+    }
+    exe.linkLibC();
+
+    const run = b.addRunArtifact(exe);
+    run.skip_foreign_checks = true;
+    run.expectStdOutEqual("4\n");
+
+    test_step.dependOn(&run.step);
+}

test/link/macho/bugs/16628/main.c

@@ -0,0 +1,8 @@
+#include <stdio.h>
+
+int foo();
+
+int main() {
+  printf("%d\n", foo());
+  return 0;
+}