llvm-dwarfdump: support a --show-children option

This will print all children of a DIE when selectively printing only
one DIE at a given offset.

llvm-svn: 313464

1 files changed, 4 insertions, 2 deletions

diff --git a/llvm/lib/DebugInfo/DWARF/DWARFContext.cpp b/llvm/lib/DebugInfo/DWARF/DWARFContext.cpp
index 02d37f21c38..373452a9278 100644
--- a/llvm/lib/DebugInfo/DWARF/DWARFContext.cpp
+++ b/llvm/lib/DebugInfo/DWARF/DWARFContext.cpp
@@ -223,6 +223,8 @@ void DWARFContext::dump(
   Optional<uint64_t> DumpOffset;
   uint64_t DumpType = DumpOpts.DumpType;
   bool DumpEH = DumpOpts.DumpEH;
+  unsigned RecDepth =
+      DumpOpts.ShowChildren ? std::numeric_limits<unsigned>::max() : 0;
 
   StringRef Extension = sys::path::extension(DObj->getFileName());
   bool IsDWO = (Extension == ".dwo") || (Extension == ".dwp");
@@ -260,7 +262,7 @@ void DWARFContext::dump(
     if (shouldDump(IsExplicit, Name, DIDT_ID_DebugInfo, Section.Data)) {
       for (const auto &CU : CUs)
         if (DumpOffset)
-        CU->getDIEForOffset(DumpOffset.getValue()).dump(OS, 0);
+          CU->getDIEForOffset(DumpOffset.getValue()).dump(OS, RecDepth);
         else
           CU->dump(OS, DumpOpts);
     }
@@ -277,7 +279,7 @@ void DWARFContext::dump(
     for (const auto &TUS : TUSections)
       for (const auto &TU : TUS)
         if (DumpOffset)
-          TU->getDIEForOffset(*DumpOffset).dump(OS, 0);
+          TU->getDIEForOffset(*DumpOffset).dump(OS, RecDepth);
         else
           TU->dump(OS, DumpOpts);
   };