[PDB] Add the ability to lookup global symbols by name.

The Globals table is a hash table keyed on symbol name, so
it's possible to lookup symbols by name in O(1) time.  Add
a function to the globals stream to do this, and add an option
to llvm-pdbutil to exercise this, then use it to write some
tests to verify correctness.

llvm-svn: 343951

1 files changed, 5 insertions, 0 deletions

diff --git a/llvm/tools/llvm-pdbutil/llvm-pdbutil.cpp b/llvm/tools/llvm-pdbutil/llvm-pdbutil.cpp
index da9a64487ed..34618f6b762 100644
--- a/llvm/tools/llvm-pdbutil/llvm-pdbutil.cpp
+++ b/llvm/tools/llvm-pdbutil/llvm-pdbutil.cpp
@@ -526,6 +526,11 @@ cl::opt<bool> DumpGlobals("globals", cl::desc("dump Globals symbol records"),
                           cl::cat(SymbolOptions), cl::sub(DumpSubcommand));
 cl::opt<bool> DumpGlobalExtras("global-extras", cl::desc("dump Globals hashes"),
                                cl::cat(SymbolOptions), cl::sub(DumpSubcommand));
+cl::list<std::string> DumpGlobalNames(
+    "global-name",
+    cl::desc(
+        "With -globals, only dump globals whose name matches the given value"),
+    cl::cat(SymbolOptions), cl::sub(DumpSubcommand), cl::ZeroOrMore);
 cl::opt<bool> DumpPublics("publics", cl::desc("dump Publics stream data"),
                           cl::cat(SymbolOptions), cl::sub(DumpSubcommand));
 cl::opt<bool> DumpPublicExtras("public-extras",