[compiler-rt] 0dc634b - hwasan_symbolize: warn about missing symbols at most once per library

[Evgenii Stepanov via llvm-commits]

Author: Evgenii Stepanov
Date: 2020-02-03T18:23:48-08:00
New Revision: 0dc634babf9eff587ea9b4cf5b847749f6225dee

URL: https://github.com/llvm/llvm-project/commit/0dc634babf9eff587ea9b4cf5b847749f6225dee
DIFF: https://github.com/llvm/llvm-project/commit/0dc634babf9eff587ea9b4cf5b847749f6225dee.diff

LOG: hwasan_symbolize: warn about missing symbols at most once per library

Reviewers: vitalybuka

Subscribers: #sanitizers, llvm-commits

Tags: #sanitizers, #llvm

Differential Revision: https://reviews.llvm.org/D73822

Added: 
    

Modified: 
    compiler-rt/lib/hwasan/scripts/hwasan_symbolize

Removed: 
    


################################################################################
diff  --git a/compiler-rt/lib/hwasan/scripts/hwasan_symbolize b/compiler-rt/lib/hwasan/scripts/hwasan_symbolize
index f77e36fbd622..e845786f34bc 100755
--- a/compiler-rt/lib/hwasan/scripts/hwasan_symbolize
+++ b/compiler-rt/lib/hwasan/scripts/hwasan_symbolize
@@ -28,6 +28,7 @@ class Symbolizer:
     self.__binary_prefixes = binary_prefixes
     self.__paths_to_cut = paths_to_cut
     self.__log = False
+    self.__warnings = set()
 
   def enable_logging(self, enable):
     self.__log = enable
@@ -73,7 +74,9 @@ class Symbolizer:
       full_path = os.path.join(p, os.path.basename(name))
       if os.path.exists(full_path):
         return full_path
-    print >>sys.stderr, "Could not find symbols for", name
+    if name not in self.__warnings:
+      print >>sys.stderr, "Could not find symbols for", name
+      self.__warnings.add(name)
     return None
 
   def iter_locals(self, binary, addr):