pdbdump: Fix crash bug.

rui314 · rui314 · commit d1d8c8312a41 · 2016-08-03T23:43:23.000Z
pdbdump calls DbiStreamBuilder::commit through PDBFileBuilder::commit without calling DbiStreamBuilder::finalize. Because `finalize` initializes `Header` member, `Header` remained nullptr which caused a crash bug. Differential Revision: https://reviews.llvm.org/D23143 llvm-svn: 277681
diff --git a/llvm/include/llvm/DebugInfo/PDB/Raw/DbiStreamBuilder.h b/llvm/include/llvm/DebugInfo/PDB/Raw/DbiStreamBuilder.h
@@ -49,7 +49,7 @@ class DbiStreamBuilder {
   Expected<std::unique_ptr<DbiStream>> build(PDBFile &File,
                                              const msf::WritableStream &Buffer);
   Error commit(const msf::MSFLayout &Layout,
-               const msf::WritableStream &Buffer) const;
+               const msf::WritableStream &Buffer);
 
 private:
   Error finalize();
diff --git a/llvm/lib/DebugInfo/PDB/Raw/DbiStreamBuilder.cpp b/llvm/lib/DebugInfo/PDB/Raw/DbiStreamBuilder.cpp
@@ -249,7 +249,10 @@ DbiStreamBuilder::build(PDBFile &File, const msf::WritableStream &Buffer) {
 }
 
 Error DbiStreamBuilder::commit(const msf::MSFLayout &Layout,
-                               const msf::WritableStream &Buffer) const {
+                               const msf::WritableStream &Buffer) {
+  if (auto EC = finalize())
+    return EC;
+
   auto InfoS =
       WritableMappedBlockStream::createIndexedStream(Layout, Buffer, StreamDBI);
 
diff --git a/llvm/test/DebugInfo/PDB/pdbdump-readwrite.test b/llvm/test/DebugInfo/PDB/pdbdump-readwrite.test
@@ -0,0 +1,4 @@
+; RUN: llvm-pdbdump pdb2yaml -dbi-module-info -dbi-module-source-info \
+; RUN:   -dbi-stream -pdb-stream -stream-directory -stream-metadata \
+; RUN:   %p/Inputs/empty.pdb > %t.1
+; RUN: llvm-pdbdump yaml2pdb -pdb=%t.2 %t.1
