1 files changed, 104 insertions, 0 deletions
diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_llvm.cc b/compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_llvm.cc
new file mode 100644
index 00000000000..5dd1ad8ddfe
--- /dev/null
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_llvm.cc
@@ -0,0 +1,104 @@
+//===-- sanitizer_symbolizer_llvm.cc --------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This is a wrapper around llvm::DIContext, moved to separate file to
+// include LLVM headers in a single place in sanitizer library. If macro
+// SANITIZER_USES_LLVM_LIBS is not defined, then sanitizer runtime
+// will not include LLVM headers and will not require static
+// LLVM libraries to link with.
+// In this case, the symbolizer will just return zeroes instead of
+// valid file/line info.
+//
+// This file is shared between AddressSanitizer and ThreadSanitizer
+// run-time libraries.
+//===----------------------------------------------------------------------===//
+
+#include "sanitizer_common.h"
+#include "sanitizer_symbolizer.h"
+
+#ifdef SANITIZER_USES_LLVM_LIBS
+# ifndef __STDC_LIMIT_MACROS
+#  define __STDC_LIMIT_MACROS 1
+# endif
+# ifndef __STDC_CONSTANT_MACROS
+#  define __STDC_CONSTANT_MACROS 1
+# endif
+# include "llvm/ADT/StringRef.h"
+# include "llvm/DebugInfo/DIContext.h"
+
+namespace __sanitizer {
+
+static llvm::StringRef ToStringRef(const DWARFSection &section) {
+  return llvm::StringRef(section.data, section.size);
+}
+
+class DWARFContext : public llvm::DIContext {};
+
+DWARFContext *getDWARFContext(DWARFSection debug_info,
+                              DWARFSection debug_abbrev,
+                              DWARFSection debug_aranges,
+                              DWARFSection debug_line,
+                              DWARFSection debug_str) {
+  return (DWARFContext*)llvm::DIContext::getDWARFContext(
+      true, ToStringRef(debug_info), ToStringRef(debug_abbrev),
+      llvm::StringRef(),  // don't use .debug_aranges for now.
+      ToStringRef(debug_line), ToStringRef(debug_str));
+}
+
+void getLineInfoFromContext(DWARFContext *context, AddressInfo *info) {
+  CHECK(context);
+  uint32_t flags = llvm::DILineInfoSpecifier::FileLineInfo |
+                   llvm::DILineInfoSpecifier::AbsoluteFilePath |
+                   llvm::DILineInfoSpecifier::FunctionName;
+  llvm::DILineInfo line_info = context->getLineInfoForAddress(
+      info->module_offset, flags);
+
+  const char *function = line_info.getFunctionName();
+  CHECK(function);
+  if (0 != internal_strcmp("<invalid>", function))
+    info->function = internal_strdup(function);
+  else
+    info->function = 0;
+
+  const char *file = line_info.getFileName();
+  CHECK(file);
+  if (0 != internal_strcmp("<invalid>", file))
+    info->file = internal_strdup(file);
+  else
+    info->file = 0;
+
+  info->line = line_info.getLine();
+  info->column = line_info.getColumn();
+}
+
+}  // namespace __sanitizer
+
+#else  // SANITIZER_USES_LLVM_LIBS
+namespace __sanitizer {
+
+class DWARFContext {};
+
+DWARFContext *getDWARFContext(DWARFSection debug_info,
+                              DWARFSection debug_abbrev,
+                              DWARFSection debug_aranges,
+                              DWARFSection debug_line,
+                              DWARFSection debug_str) {
+  return 0;
+}
+
+void getLineInfoFromContext(DWARFContext *context, AddressInfo *info) {
+  (void)context;
+  info->function = 0;
+  info->file = 0;
+  info->line = 0;
+  info->column = 0;
+}
+
+}  // namespace __sanitizer
+#endif  // SANITIZER_USES_LLVM_LIBS