From 63165f6ae3bac1623be36d4b3ce63afa1d51a30a Mon Sep 17 00:00:00 2001 From: Bob Wilson Date: Mon, 14 Nov 2016 17:56:18 +0000 Subject: [PATCH] Use _Unwind_Backtrace on Apple platforms. MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Darwin's backtrace() function does not work with sigaltstack (which was enabled when available with r270395) — it does a sanity check to make sure that the current frame pointer is within the expected stack area (which it is not when using an alternate stack) and gives up otherwise. The alternative of _Unwind_Backtrace seems to work fine on macOS, so use that when backtrace() fails. Note that we then use backtrace_symbols_fd() with the addresses from _Unwind_Backtrace, but I’ve tested that and it also seems to work fine. rdar://problem/28646552 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@286851 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Support/Unix/Signals.inc | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/lib/Support/Unix/Signals.inc b/lib/Support/Unix/Signals.inc index 9752b70644c..3750d7f4c09 100644 --- a/lib/Support/Unix/Signals.inc +++ b/lib/Support/Unix/Signals.inc @@ -48,7 +48,7 @@ // _Unwind_Backtrace function, but on FreeBSD the configure test passes // despite the function not existing, and on Android, conflicts // with . -#ifdef __GLIBC__ +#if defined(__GLIBC__) || defined(__APPLE__) #include #else #undef HAVE__UNWIND_BACKTRACE -- 2.40.0