1 files changed, 17 insertions, 8 deletions

diff --git a/src/common/windows/pdb_source_line_writer.h b/src/common/windows/pdb_source_line_writer.h
index e9e89bb2..5a8bcbe7 100644
--- a/src/common/windows/pdb_source_line_writer.h
+++ b/src/common/windows/pdb_source_line_writer.h
@@ -92,7 +92,9 @@ class PDBSourceLineWriter {
     ANY_FILE   // try PDB_FILE and then EXE_FILE
   };
 
-  explicit PDBSourceLineWriter();
+  // NB: |enable_multiple_field| is temporary while transitioning to enabling
+  // writing the multiple field permanently.
+  explicit PDBSourceLineWriter(bool enable_multiple_field = false);
   ~PDBSourceLineWriter();
 
   // Opens the given file.  For executable files, the corresponding pdb
@@ -138,11 +140,12 @@ class PDBSourceLineWriter {
   bool PrintLines(IDiaEnumLineNumbers *lines);
 
   // Outputs a function address and name, followed by its source line list.
-  // block can be the same object as function, or it can be a reference
-  // to a code block that is lexically part of this function, but
-  // resides at a separate address.
-  // Returns true on success.
-  bool PrintFunction(IDiaSymbol *function, IDiaSymbol *block);
+  // block can be the same object as function, or it can be a reference to a
+  // code block that is lexically part of this function, but resides at a
+  // separate address. If has_multiple_symbols is true, this function's
+  // instructions correspond to multiple symbols. Returns true on success.
+  bool PrintFunction(IDiaSymbol *function, IDiaSymbol *block,
+                     bool has_multiple_symbols);
 
   // Outputs all functions as described above.  Returns true on success.
   bool PrintFunctions();
@@ -167,8 +170,10 @@ class PDBSourceLineWriter {
 
   // Outputs a single public symbol address and name, if the symbol corresponds
   // to a code address.  Returns true on success.  If symbol is does not
-  // correspond to code, returns true without outputting anything.
-  bool PrintCodePublicSymbol(IDiaSymbol *symbol);
+  // correspond to code, returns true without outputting anything. If
+  // has_multiple_symbols is true, the symbol corresponds to a code address and
+  // the instructions correspond to multiple symbols.
+  bool PrintCodePublicSymbol(IDiaSymbol *symbol, bool has_multiple_symbols);
 
   // Outputs a line identifying the PDB file that is being dumped, along with
   // its uuid and age.
@@ -227,6 +232,10 @@ class PDBSourceLineWriter {
   // a failure, returns 0, which is also a valid number of bytes.
   static int GetFunctionStackParamSize(IDiaSymbol *function);
 
+  // True if the optional 'm' field on FUNC and PUBLIC for multiple symbols at
+  // the same address should be output.
+  bool enable_multiple_field_;
+
   // The filename of the PE file corresponding to the currently-open
   // pdb file.
   wstring code_file_;