release/20.x: [llvm][Support] Enable dl_iterate_phdr support on OpenBSD and DragonFly (#125186)

[llvmbot]

Backport 95e19e2

Requested by: @brad0

[llvmbot]

@llvm/pr-subscribers-llvm-support

Author: None (llvmbot)

Changes

Backport 95e19e2

Requested by: @brad0

---

Full diff: https://github.com/llvm/llvm-project/pull/125210.diff

1 Files Affected:

• (modified) llvm/lib/Support/Unix/Signals.inc (+2-1)

diff --git a/llvm/lib/Support/Unix/Signals.inc b/llvm/lib/Support/Unix/Signals.inc
index 9a12663228a368..2e7b467a14bbe2 100644
--- a/llvm/lib/Support/Unix/Signals.inc
+++ b/llvm/lib/Support/Unix/Signals.inc
@@ -468,7 +468,8 @@ void llvm::sys::AddSignalHandler(sys::SignalHandlerCallback FnPtr,
 
 #if ENABLE_BACKTRACES && defined(HAVE_BACKTRACE) &&                            \
     (defined(__linux__) || defined(__FreeBSD__) ||                             \
-     defined(__FreeBSD_kernel__) || defined(__NetBSD__))
+     defined(__FreeBSD_kernel__) || defined(__NetBSD__) ||                     \
+     defined(__OpenBSD__) || defined(__DragonFly__))
 struct DlIteratePhdrData {
   void **StackTrace;
   int depth;

[tstellar]

@nikic Can you take a quick look at this one.

[github-actions]

@brad0 (or anyone else). If you would like to add a note about this fix in the release notes (completely optional). Please reply to this comment with a one or two sentence description of the fix. When you are done, please add the release:note label to this PR.