[esan] Fix uninitialized warning from interception context

The interception context is not used by esan, but the compiler complains
about it being uninitialized all the same.  We set it to null to avoid the
warning.

llvm-svn: 267376

diff --git a/compiler-rt/lib/esan/esan_interceptors.cpp b/compiler-rt/lib/esan/esan_interceptors.cpp
index 3973aa4..6c535c5 100644 (file)
--- a/compiler-rt/lib/esan/esan_interceptors.cpp
+++ b/compiler-rt/lib/esan/esan_interceptors.cpp
@@ -44,11 +44,13 @@ using namespace __esan; // NOLINT
 
 #define COMMON_INTERCEPT_FUNCTION(name) INTERCEPT_FUNCTION(name)
 
+// We currently do not use ctx.
 #define COMMON_INTERCEPTOR_ENTER(ctx, func, ...)                               \
   do {                                                                         \
     if (UNLIKELY(COMMON_INTERCEPTOR_NOTHING_IS_INITIALIZED)) {                 \
       return REAL(func)(__VA_ARGS__);                                          \
     }                                                                          \
+    ctx = nullptr;                                                             \
     (void)ctx;                                                                 \
   } while (false)