[PATCH] D147371: [libunwind][test] Add test to check for unw_resume()

[Limin Zhang via Phabricator via llvm-commits]

Ami-zhang created this revision.
Ami-zhang added reviewers: SixWeining, wangleiat, xen0n, MaskRay.
Herald added projects: libunwind, All.
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This is here for local unwinding, which unw_resume() restores
the machine state and then directly resumes execution in the
target stack frame.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D147371

Files:
  libunwind/test/unw_resume.pass.cpp


Index: libunwind/test/unw_resume.pass.cpp
===================================================================
--- /dev/null
+++ libunwind/test/unw_resume.pass.cpp
@@ -0,0 +1,33 @@
+// -*- C++ -*-
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// Ensure that unw_resume() resumes execution at the stack frame identified by
+// cursor.
+
+// FIXME: The return address register($ra/$r1) is restored with a destroyed base
+// address register($a0/$r4) in the assembly file `UnwindRegistersRestore.S` on
+// LoongArch. And we will fix this issue in the next commit.
+// XFAIL: target={{loongarch64-.+}}
+
+#include <libunwind.h>
+
+void test_unw_resume() {
+  unw_context_t context;
+  unw_cursor_t cursor;
+
+  unw_getcontext(&context);
+  unw_init_local(&cursor, &context);
+  unw_step(&cursor);
+  unw_resume(&cursor);
+}
+
+int main() {
+  test_unw_resume();
+  return 0;
+}


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