src: introduce DCHECK macro and use DCHECK* macros where possible

src/aliased_buffer.h

@@ -198,19 +198,15 @@ class AliasedBuffer {
    *  Set position index to given value.
    */
   inline void SetValue(const size_t index, NativeT value) {
-#if defined(DEBUG) && DEBUG
-    CHECK_LT(index, count_);
-#endif
+    DCHECK_LT(index, count_);
     buffer_[index] = value;
   }
 
   /**
    *  Get value at position index
    */
   inline const NativeT GetValue(const size_t index) const {
-#if defined(DEBUG) && DEBUG
-    CHECK_LT(index, count_);
-#endif
+    DCHECK_LT(index, count_);
     return buffer_[index];
   }
 
@@ -233,11 +229,9 @@ class AliasedBuffer {
   // Should only be used on an owning array, not one created as a sub array of
   // an owning `AliasedBuffer`.
   void reserve(size_t new_capacity) {
-#if defined(DEBUG) && DEBUG
-    CHECK_GE(new_capacity, count_);
-    CHECK_EQ(byte_offset_, 0);
-    CHECK(free_buffer_);
-#endif
+    DCHECK_GE(new_capacity, count_);
+    DCHECK_EQ(byte_offset_, 0);
+    DCHECK(free_buffer_);
     const v8::HandleScope handle_scope(isolate_);
 
     const size_t old_size_in_bytes = sizeof(NativeT) * count_;

src/base_object-inl.h

@@ -113,10 +113,8 @@ void BaseObject::ClearWeak() {
 v8::Local<v8::FunctionTemplate>
 BaseObject::MakeLazilyInitializedJSTemplate(Environment* env) {
   auto constructor = [](const v8::FunctionCallbackInfo<v8::Value>& args) {
-#ifdef DEBUG
-    CHECK(args.IsConstructCall());
-    CHECK_GT(args.This()->InternalFieldCount(), 0);
-#endif
+    DCHECK(args.IsConstructCall());
+    DCHECK_GT(args.This()->InternalFieldCount(), 0);
     args.This()->SetAlignedPointerInInternalField(0, nullptr);
   };
 

src/debug_utils.h

@@ -68,9 +68,7 @@ template <typename... Args>
 inline void FORCE_INLINE Debug(AsyncWrap* async_wrap,
                                const char* format,
                                Args&&... args) {
-#ifdef DEBUG
-  CHECK_NOT_NULL(async_wrap);
-#endif
+  DCHECK_NOT_NULL(async_wrap);
   DebugCategory cat =
       static_cast<DebugCategory>(async_wrap->provider_type());
   if (!UNLIKELY(async_wrap->env()->debug_enabled(cat)))

src/inspector/node_string.h

@@ -73,8 +73,4 @@ extern size_t kNotFound;
 }  // namespace inspector
 }  // namespace node
 
-#ifndef DCHECK
-  #define DCHECK CHECK
-  #define DCHECK_LT CHECK_LT
-#endif  // DCHECK
 #endif  // SRC_INSPECTOR_NODE_STRING_H_

src/string_decoder.cc

@@ -44,9 +44,7 @@ MaybeLocal<String> MakeString(Isolate* isolate,
     isolate->ThrowException(error);
   }
 
-#ifdef DEBUG
-  CHECK(ret.IsEmpty() || ret.ToLocalChecked()->IsString());
-#endif
+  DCHECK(ret.IsEmpty() || ret.ToLocalChecked()->IsString());
   return ret.FromMaybe(Local<Value>()).As<String>();
 }
 
@@ -123,11 +121,9 @@ MaybeLocal<String> StringDecoder::DecodeData(Isolate* isolate,
       body = !prepend.IsEmpty() ? prepend : String::Empty(isolate);
       prepend = Local<String>();
     } else {
-#ifdef DEBUG
       // If not, that means is no character left to finish at this point.
-      CHECK_EQ(MissingBytes(), 0);
-      CHECK_EQ(BufferedBytes(), 0);
-#endif
+      DCHECK_EQ(MissingBytes(), 0);
+      DCHECK_EQ(BufferedBytes(), 0);
 
       // See whether there is a character that we may have to cut off and
       // finish when receiving the next chunk.
@@ -136,9 +132,7 @@ MaybeLocal<String> StringDecoder::DecodeData(Isolate* isolate,
         // This means we'll need to figure out where the character to which
         // the byte belongs begins.
         for (size_t i = nread - 1; ; --i) {
-#ifdef DEBUG
-          CHECK_LT(i, nread);
-#endif
+          DCHECK_LT(i, nread);
           state_[kBufferedBytes]++;
           if ((data[i] & 0xC0) == 0x80) {
             // This byte does not start a character (a "trailing" byte).

src/string_search.h

@@ -37,9 +37,7 @@ class Vector {
 
   // Access individual vector elements - checks bounds in debug mode.
   T& operator[](size_t index) const {
-#ifdef DEBUG
-    CHECK(index < length_);
-#endif
+    DCHECK_LT(index, length_);
     return start_[is_forward_ ? index : (length_ - index - 1)];
   }
 

src/util.h

@@ -130,6 +130,7 @@ void DumpBacktrace(FILE* fp);
 #define CHECK_IMPLIES(a, b) CHECK(!(a) || (b))
 
 #ifdef DEBUG
+  #define DCHECK(expr) CHECK(expr)
   #define DCHECK_EQ(a, b) CHECK((a) == (b))
   #define DCHECK_GE(a, b) CHECK((a) >= (b))
   #define DCHECK_GT(a, b) CHECK((a) > (b))
@@ -140,6 +141,7 @@ void DumpBacktrace(FILE* fp);
   #define DCHECK_NOT_NULL(val) CHECK((val) != nullptr)
   #define DCHECK_IMPLIES(a, b) CHECK(!(a) || (b))
 #else
+  #define DCHECK(expr)
   #define DCHECK_EQ(a, b)
   #define DCHECK_GE(a, b)
   #define DCHECK_GT(a, b)