https://github.com/xingxue-ibm created https://github.com/llvm/llvm-project/pull/101069
Patch [llvm#92291](https://github.com/llvm/llvm-project/pull/92291) causes wrong traceback from a signal handler for AIX because the AIX unwinder uses the traceback table at the end of each function instead of FDE/CIE for unwinding. This patch adds a condition to exclude traceback table based unwinding from the code added by the patch. >From 05110959c01b5b7d4f2530e4d21232053db939f3 Mon Sep 17 00:00:00 2001 From: Xing Xue <xing...@outlook.com> Date: Mon, 29 Jul 2024 14:53:36 -0400 Subject: [PATCH] Fix the problem introduced by upstream patch https://github.com/llvm/llvm-project/pull/92291 guard the code added to exclude traceback based unwinding used for AIX. --- libunwind/src/UnwindCursor.hpp | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/libunwind/src/UnwindCursor.hpp b/libunwind/src/UnwindCursor.hpp index 2ec60e4c123d5..758557337899e 100644 --- a/libunwind/src/UnwindCursor.hpp +++ b/libunwind/src/UnwindCursor.hpp @@ -2589,7 +2589,8 @@ void UnwindCursor<A, R>::setInfoBasedOnIPRegister(bool isReturnAddress) { --pc; #endif -#if !(defined(_LIBUNWIND_SUPPORT_SEH_UNWIND) && defined(_WIN32)) +#if !(defined(_LIBUNWIND_SUPPORT_SEH_UNWIND) && defined(_WIN32)) && \ + !defined(_LIBUNWIND_SUPPORT_TBTAB_UNWIND) // In case of this is frame of signal handler, the IP saved in the signal // handler points to first non-executed instruction, while FDE/CIE expects IP // to be after the first non-executed instruction. _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
