RPCS3/llvm-mirror
1
0
Fork 0
mirror of https://github.com/RPCS3/llvm-mirror.git synced 2025-02-04 03:06:28 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Use _Unwind_Backtrace on Apple platforms.

Browse Source 
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

llvm-svn: 286851
This commit is contained in:
Bob Wilson 2016-11-14 17:56:18 +00:00
parent 8e5be89e2d
commit c6d762eb86
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
lib/Support/Unix/Signals.inc
View File

@ -48,7 +48,7 @@
// _Unwind_Backtrace function, but on FreeBSD the configure test passes // _Unwind_Backtrace function, but on FreeBSD the configure test passes
// despite the function not existing, and on Android, <unwind.h> conflicts // despite the function not existing, and on Android, <unwind.h> conflicts
// with <link.h>. // with <link.h>.
#ifdef __GLIBC__ #if defined(__GLIBC__) || defined(__APPLE__)
#include <unwind.h> #include <unwind.h>
#else #else
#undef HAVE__UNWIND_BACKTRACE #undef HAVE__UNWIND_BACKTRACE