Let google::Symbolize only print address offset in sanitizer builds.

base/third_party/symbolize/symbolize.cc

Index: base/third_party/symbolize/symbolize.cc
diff --git a/base/third_party/symbolize/symbolize.cc b/base/third_party/symbolize/symbolize.cc
index 0932e64abdd48adafb8dde6873f3ea4ae3c0a398..b41a17b8b61dd6a11924a50c11ae4f5a3102c9ae 100644
--- a/base/third_party/symbolize/symbolize.cc
+++ b/base/third_party/symbolize/symbolize.cc
@@ -773,7 +773,10 @@ static ATTRIBUTE_NOINLINE bool SymbolizeAndDemangle(void *pc, char *out,
   }
 
   // Check whether a file name was returned.
+#if !defined(ADDRESS_SANITIZER) && !defined(LEAK_SANITIZER) && \

[Lei Zhang, 2017/05/02 19:18:41]

Alternatively, use the #if to set some constant, and use that on line 778 so it
always returns true? Then you don't have to write the #if twice.

[Nico, 2017/05/02 20:18:27]

It's somewhat less icky, but still icky, so I think I don't want to invalidate
my completed try run for this :-)

+    !defined(MEMORY_SANITIZER) && !defined(THREAD_SANITIZER)
   if (object_fd < 0) {
+#endif
     if (out[1]) {
       // The object file containing PC was determined successfully however the
       // object file was not opened successfully.  This is still considered
@@ -787,7 +790,10 @@ static ATTRIBUTE_NOINLINE bool SymbolizeAndDemangle(void *pc, char *out,
     }
     // Failed to determine the object file containing PC.  Bail out.
     return false;
+#if !defined(ADDRESS_SANITIZER) && !defined(LEAK_SANITIZER) && \
+    !defined(MEMORY_SANITIZER) && !defined(THREAD_SANITIZER)
   }
+#endif
   FileDescriptor wrapped_object_fd(object_fd);
   int elf_type = FileGetElfType(wrapped_object_fd.get());
   if (elf_type == -1) {