fix(test): preserve Ghidra interior-label controls on Mach-O (#1640)

* fix(test): preserve Ghidra interior-label controls on Mach-O

* test: preserve selector semantics and accept signaled fixture exits

* test(javascript): exercise deep returns through the public CLI

scripts/lib/real-ghidra-entry-aliases.mjs

@@ -21,15 +21,25 @@ export async function verifyGhidraEntryAliases({
     new URL("../../tests/conformance/ghidra/entry-aliases.c", import.meta.url),
   );
   const path = join(workspace, "entry-aliases");
-  const prefix = process.platform === "darwin" ? "_" : "";
   try {
-    await exec(compiler, ["-O0", "-g", "-fno-inline", source, "-o", path], {
-      env,
-      timeout: 30000,
-    });
+    // Mach-O function-start metadata would promote the interior control label.
+    await exec(
+      compiler,
+      [
+        "-O0",
+        "-g",
+        "-fno-inline",
+        ...(process.platform === "darwin" ? ["-Wl,-no_function_starts"] : []),
+        source,
+        "-o",
+        path,
+      ],
+      { env, timeout: 30000 },
+    );
     const bytes = await readFile(path);
     await call("close_binary");
-    await call("open_binary", { path, provider_id: "ghidra" });
+    const imported = await call("open_binary", { path, provider_id: "ghidra" });
+    const prefix = imported.format === "mach-o" ? "_" : "";
     const names = await call("list_names");
     const alias = names.find(
       ({ value }) => value === `${prefix}rea_entry_alias`,
@@ -46,8 +56,10 @@ export async function verifyGhidraEntryAliases({
     );
     assert.ok(canonical, "Fixture alias is not at a function entry");
     const xrefsSelectors = [];
+    // CLI xrefs keeps bare hexadecimal selectors as addresses. A Mach-O
+    // primary label such as "dead" is tested below as a procedure name instead.
     for (const value of [
-      canonical.value,
+      `${prefix}rea_alias_target`,
       alias.value,
       `${prefix}rea_xrefs_data`,
       `${prefix}rea_xrefs_unreferenced`,
@@ -153,7 +165,11 @@ export async function verifyGhidraEntryAliases({
           { env, timeout: 240000, maxBuffer: 16 * 1024 * 1024 },
         );
         const evidence = JSON.parse(stdout);
-        assert.deepEqual(evidence.normalized_result, expected);
+        assert.deepEqual(
+          evidence.normalized_result,
+          expected,
+          `CLI xrefs mismatch for ${JSON.stringify(selector)}`,
+        );
         assert.equal(evidence.parameters.address, selector.at(-1));
       }
     }

tests/boundary/providers/hopper/hopperClient.diagnostics.test.ts

@@ -9,6 +9,12 @@ import {
 } from "../../../../src/hopper/HopperClient.js";
 import { HopperFixtureLauncher } from "./hopperClient.fixture.js";
 
+const expectStoppedLauncher = (launcher: HopperFixtureLauncher): void => {
+  const child = launcher.processes[0];
+  if (child === undefined) throw new Error("Diagnostic fixture did not launch");
+  expect(child.exitCode !== null || child.signalCode !== null).toBe(true);
+};
+
 it("bounds long-lived launcher output while keeping the bridge usable", async () => {
   let observedStderrBytes = 0;
   const diagnosticLauncher = new HopperFixtureLauncher(undefined, "noisy");
@@ -35,7 +41,7 @@ it("bounds long-lived launcher output while keeping the bridge usable", async ()
   await client.close();
   const directory = diagnosticLauncher.directories[0] ?? "";
   await expect(access(directory)).rejects.toMatchObject({ code: "ENOENT" });
-  expect(diagnosticLauncher.processes[0]?.exitCode).not.toBeNull();
+  expectStoppedLauncher(diagnosticLauncher);
 });
 
 it("reports observed and retained output when capture cuts a token", async () => {
@@ -84,5 +90,5 @@ it("reports observed and retained output when capture cuts a token", async () =>
   await client.close();
   const directory = diagnosticLauncher.directories[0] ?? "";
   await expect(access(directory)).rejects.toMatchObject({ code: "ENOENT" });
-  expect(diagnosticLauncher.processes[0]?.exitCode).not.toBeNull();
+  expectStoppedLauncher(diagnosticLauncher);
 });

tests/conformance/ghidra/entry-aliases.c

@@ -9,7 +9,8 @@ volatile int rea_xrefs_data = 17;
 __attribute__((used)) volatile int rea_xrefs_unreferenced = 41;
 
 __attribute__((noinline, used)) int rea_alias_target(void) {
-  __asm__ volatile(".globl " REA_SYMBOL("rea_interior") "\n"
+  // ARM64 leaf functions may have no prologue; keep the control past entry.
+  __asm__ volatile("nop\n.globl " REA_SYMBOL("rea_interior") "\n"
                    REA_SYMBOL("rea_interior") ":");
   return rea_xrefs_data;
 }