[llvm-symbolizer] Introduce the -dsym-hint option.

llvm-symbolizer will consult one of the .dSYM paths passed via -dsym-hint
if it fails to find the .dSYM bundle at the default location.

llvm-svn: 220004

1 files changed, 14 insertions, 0 deletions

diff --git a/llvm/tools/llvm-symbolizer/llvm-symbolizer.cpp b/llvm/tools/llvm-symbolizer/llvm-symbolizer.cpp
index 29db172531b..d554022e450 100644
--- a/llvm/tools/llvm-symbolizer/llvm-symbolizer.cpp
+++ b/llvm/tools/llvm-symbolizer/llvm-symbolizer.cpp
@@ -19,6 +19,7 @@
 #include "llvm/ADT/StringRef.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/Debug.h"
+#include "llvm/Support/FileSystem.h"
 #include "llvm/Support/ManagedStatic.h"
 #include "llvm/Support/PrettyStackTrace.h"
 #include "llvm/Support/Signals.h"
@@ -61,6 +62,11 @@ ClBinaryName("obj", cl::init(""),
              cl::desc("Path to object file to be symbolized (if not provided, "
                       "object file should be specified for each input line)"));
 
+static cl::list<std::string>
+ClDsymHint("dsym-hint", cl::ZeroOrMore,
+           cl::desc("Path to .dSYM bundles to search for debug info for the "
+                    "object files"));
+
 static bool parseCommand(bool &IsData, std::string &ModuleName,
                          uint64_t &ModuleOffset) {
   const char *kDataCmd = "DATA ";
@@ -119,6 +125,14 @@ int main(int argc, char **argv) {
   cl::ParseCommandLineOptions(argc, argv, "llvm-symbolizer\n");
   LLVMSymbolizer::Options Opts(ClUseSymbolTable, ClPrintFunctions,
                                ClPrintInlining, ClDemangle, ClDefaultArch);
+  for (const auto &hint : ClDsymHint) {
+    if (sys::path::extension(hint) == ".dSYM") {
+      Opts.DsymHints.push_back(hint);
+    } else {
+      errs() << "Warning: invalid dSYM hint: \"" << hint <<
+                "\" (must have the '.dSYM' extension).\n";
+    }
+  }
   LLVMSymbolizer Symbolizer(Opts);
 
   bool IsData = false;