src: move ABORT() logic into node::Abort()

Don't inline calls to node::DumpBacktrace() and fflush(), it makes the
generated code bigger.  A secondary benefit of moving it to a function
is that it gives you something to put a breakpoint on.

PR-URL: nodejs#6734
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>

src/node.cc

@@ -1734,8 +1734,15 @@ void GetActiveHandles(const FunctionCallbackInfo<Value>& args) {
 }
 
 
+NO_RETURN void Abort() {
+  DumpBacktrace(stderr);
+  fflush(stderr);
+  ABORT_NO_BACKTRACE();
+}
+
+
 static void Abort(const FunctionCallbackInfo<Value>& args) {
-  ABORT();
+  Abort();
 }
 
 

src/node_internals.h

@@ -127,12 +127,10 @@ constexpr size_t arraysize(const T(&)[N]) { return N; }
 # define ROUND_UP(a, b) ((a) % (b) ? ((a) + (b)) - ((a) % (b)) : (a))
 #endif
 
-#if defined(__GNUC__) && __GNUC__ >= 4
+#ifdef __GNUC__
 # define MUST_USE_RESULT __attribute__((warn_unused_result))
-# define NO_RETURN __attribute__((noreturn))
 #else
 # define MUST_USE_RESULT
-# define NO_RETURN
 #endif
 
 bool IsExceptionDecorated(Environment* env, v8::Local<v8::Value> er);

src/util.h

@@ -19,6 +19,13 @@
 
 namespace node {
 
+#ifdef __GNUC__
+#define NO_RETURN __attribute__((noreturn))
+#else
+#define NO_RETURN
+#endif
+
+NO_RETURN void Abort();
 void DumpBacktrace(FILE* fp);
 
 #ifdef __APPLE__
@@ -43,12 +50,7 @@ template <typename T> using remove_reference = std::remove_reference<T>;
 #define ABORT_NO_BACKTRACE() abort()
 #endif
 
-#define ABORT()                                                               \
-  do {                                                                        \
-    node::DumpBacktrace(stderr);                                              \
-    fflush(stderr);                                                           \
-    ABORT_NO_BACKTRACE();                                                     \
-  } while (0)
+#define ABORT() node::Abort()
 
 #if defined(NDEBUG)
 # define ASSERT(expression)