[PATCH] D62852: Ignore DIEs in the skeleton unit in a DWO scenario

[Pavel Labath via Phabricator via llvm-commits]

This revision was automatically updated to reflect the committed changes.
Closed by commit rL362586: Ignore DIEs in the skeleton unit in a DWO scenario (authored by labath, committed by ).
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Herald added a subscriber: llvm-commits.

Repository:
  rL LLVM

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D62852/new/

https://reviews.llvm.org/D62852

Files:
  lldb/trunk/lit/SymbolFile/DWARF/split-dwarf-inlining.cpp
  lldb/trunk/source/Plugins/SymbolFile/DWARF/DWARFUnit.cpp


Index: lldb/trunk/lit/SymbolFile/DWARF/split-dwarf-inlining.cpp
===================================================================
--- lldb/trunk/lit/SymbolFile/DWARF/split-dwarf-inlining.cpp
+++ lldb/trunk/lit/SymbolFile/DWARF/split-dwarf-inlining.cpp
@@ -0,0 +1,8 @@
+// RUN: %clangxx -target x86_64-pc-linux -gsplit-dwarf -fsplit-dwarf-inlining \
+// RUN:   -c %s -o %t
+// RUN: %lldb %t -o "breakpoint set -n foo" -b | FileCheck %s
+
+// CHECK: Breakpoint 1: 2 locations
+
+__attribute__((always_inline)) int foo(int x) { return x; }
+int bar(int x) { return foo(x); }
Index: lldb/trunk/source/Plugins/SymbolFile/DWARF/DWARFUnit.cpp
===================================================================
--- lldb/trunk/source/Plugins/SymbolFile/DWARF/DWARFUnit.cpp
+++ lldb/trunk/source/Plugins/SymbolFile/DWARF/DWARFUnit.cpp
@@ -183,6 +183,17 @@
 
       if (!m_first_die)
         AddUnitDIE(m_die_array.front());
+
+      // With -fsplit-dwarf-inlining, clang will emit non-empty skeleton compile
+      // units. We are not able to access these DIE *and* the dwo file
+      // simultaneously. We also don't need to do that as the dwo file will
+      // contain a superset of information. So, we don't even attempt to parse
+      // any remaining DIEs.
+      if (m_dwo_symbol_file) {
+        m_die_array.front().SetHasChildren(false);
+        break;
+      }
+
     } else {
       if (null_die) {
         if (prev_die_had_children) {


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