[PATCH] D38864: [Sanitizers] By default build libFuzzer with frame pointers.

[Aleksey Shlyapnikov via Phabricator via llvm-commits]

alekseyshl created this revision.
Herald added a subscriber: mgorny.

Lacking frame pointers, sanitized fuzzers collect bogus stack
traces and the set of stack traces grows indefinitely, leading to OOMs.


https://reviews.llvm.org/D38864

Files:
  lib/fuzzer/CMakeLists.txt


Index: lib/fuzzer/CMakeLists.txt
===================================================================
--- lib/fuzzer/CMakeLists.txt
+++ lib/fuzzer/CMakeLists.txt
@@ -32,6 +32,10 @@
 
 set(LIBFUZZER_CFLAGS ${SANITIZER_COMMON_CFLAGS})
 
+if (NOT COMPILER_RT_LIBFUZZER_OMIT_FRAME_POINTER)
+  append_list_if(COMPILER_RT_HAS_OMIT_FRAME_POINTER_FLAG -fno-omit-frame-pointer LIBFUZZER_CFLAGS)
+endif()
+
 if (CMAKE_CXX_FLAGS MATCHES "fsanitize-coverage")
   list(APPEND LIBFUZZER_CFLAGS -fno-sanitize-coverage=trace-pc-guard,edge,trace-cmp,indirect-calls,8bit-counters)
 endif()


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