From: Paul Floyd <pjfloyd@wanadoo.fr>
Date: Thu, 11 Dec 2025 07:03:46 +0000 (+0100)
Subject: Darwin DRD: add a bodge for LLVM DWARF that our reader does not like
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=38fbc300b38aeb7b337abe0526eaa7f738b305dc;p=thirdparty%2Fvalgrind.git

Darwin DRD: add a bodge for LLVM DWARF that our reader does not like

Longer term, need to understand Apple DWARF quirks and adapt to them
as necessary.
---

diff --git a/coregrind/m_debuginfo/readdwarf3.c b/coregrind/m_debuginfo/readdwarf3.c
index 374237498..b67e41b7c 100644
--- a/coregrind/m_debuginfo/readdwarf3.c
+++ b/coregrind/m_debuginfo/readdwarf3.c
@@ -2977,6 +2977,14 @@ static void parse_var_DIE (
       if (level == 0)
          setup_cu_svma(cc, have_lo, ip_lo, td3);
 
+#if defined(VGO_darwin)
+      // FIXME PJF Darwin LLVM generates this (non-standard?) combination
+      // it only seems to affect DRD
+      if (have_lo && have_range && !have_hi1) {
+         have_lo = False;
+      }
+#endif
+
       /* Do we have something that looks sane? */
       if (have_lo && have_hi1 && (!have_range)) {
          if (ip_lo < ip_hi1)