[asan] Fix asan_symbolize.py handling of non-existing paths

llvm-svn: 248962

compiler-rt/lib/asan/scripts/asan_symbolize.py

@@ -164,8 +164,8 @@ class Addr2LineSymbolizer(Symbolizer):
         file_name = self.pipe.stdout.readline().rstrip()
         if is_first_frame:
           is_first_frame = False
-        elif function_name == '??':
-          assert file_name == '??:0'
+        elif function_name in ['', '??']:
+          assert file_name == function_name
           break
         lines.append((function_name, file_name));
     except Exception:

compiler-rt/test/asan/TestCases/Posix/asan-symbolize-bad-path.cc

@@ -0,0 +1,4 @@
+// Test that asan_symbolize does not hang when provided with an non-existing
+// path.
+// RUN: echo '#0 0xabcdabcd (%T/bad/path+0x1234)' | %asan_symbolize | FileCheck %s
+// CHECK: #0 0xabcdabcd