e25cd088a6
`unw_getcontext` saves the caller's registers in the context. However, if the caller of `unw_getcontext` is in a different module, the glue code of `unw_getcontext` sets the TOC register (r2) with the new TOC base and saves the original TOC register value in the stack frame. This causes the incorrect TOC value is used when the caller steps up frames, which fails libunwind LIT test case `unw_resume.pass.cpp`. This PR fixes the problem by using the original TOC register value saved in the stack if the caller is in a different module and enables `unw_resume.pass.cpp` on AIX.
32 lines
808 B
C++
32 lines
808 B
C++
// -*- C++ -*-
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//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// Ensure that unw_resume() resumes execution at the stack frame identified by
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// cursor.
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// TODO: Figure out why this fails with Memory Sanitizer.
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// XFAIL: msan
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#include <libunwind.h>
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void test_unw_resume() {
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unw_context_t context;
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unw_cursor_t cursor;
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unw_getcontext(&context);
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unw_init_local(&cursor, &context);
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unw_step(&cursor);
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unw_resume(&cursor);
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}
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int main() {
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test_unw_resume();
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return 0;
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}
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