[PATCH] D157354: [BOLT][DWARF][NFC] Add function to print DIE

[Alexander Yermolovich via Phabricator via llvm-commits]

ayermolo updated this revision to Diff 548389.
ayermolo added a comment.

addressed comments


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D157354/new/

https://reviews.llvm.org/D157354

Files:
  bolt/lib/Rewrite/DWARFRewriter.cpp


Index: bolt/lib/Rewrite/DWARFRewriter.cpp
===================================================================
--- bolt/lib/Rewrite/DWARFRewriter.cpp
+++ bolt/lib/Rewrite/DWARFRewriter.cpp
@@ -57,7 +57,6 @@
 #undef DEBUG_TYPE
 #define DEBUG_TYPE "bolt"
 
-LLVM_ATTRIBUTE_UNUSED
 static void printDie(const DWARFDie &DIE) {
   DIDumpOptions DumpOpts;
   DumpOpts.ShowForm = true;
@@ -67,6 +66,28 @@
   DIE.dump(dbgs(), 0, DumpOpts);
 }
 
+/// Lazily parse DWARF DIE and print it out.
+LLVM_ATTRIBUTE_UNUSED
+static void printDie(DWARFUnit &DU, uint64_t DIEOffset) {
+  uint64_t OriginalOffsets = DIEOffset;
+  uint64_t NextCUOffset = DU.getNextUnitOffset();
+  DWARFDataExtractor DebugInfoData = DU.getDebugInfoExtractor();
+  DWARFDebugInfoEntry DIEEntry;
+  if (DIEEntry.extractFast(DU, &DIEOffset, DebugInfoData, NextCUOffset, 0)) {
+    if (const DWARFAbbreviationDeclaration *AbbrDecl =
+            DIEEntry.getAbbreviationDeclarationPtr()) {
+      DWARFDie DDie(&DU, &DIEEntry);
+      printDie(DDie);
+    } else {
+      dbgs() << "Failed to extract abbreviation for"
+             << Twine::utohexstr(OriginalOffsets) << "\n";
+    }
+  } else {
+    dbgs() << "Failed to extract DIE for " << Twine::utohexstr(OriginalOffsets)
+           << " \n";
+  }
+}
+
 namespace llvm {
 namespace bolt {
 /// Emits debug information into .debug_info or .debug_types section.


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