[runtime] Use DCHECK_EQ instead of DCHECK for number of args.

src/runtime/runtime-futex.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/runtime/runtime-utils.h"
 
 #include "src/arguments.h"
 #include "src/base/platform/time.h"
 #include "src/conversions-inl.h"
 #include "src/futex-emulation.h"
 #include "src/globals.h"
 
 // Implement Futex API for SharedArrayBuffers as defined in the
 // SharedArrayBuffer draft spec, found here:
 // https://github.com/tc39/ecmascript_sharedmem
 
 namespace v8 {
 namespace internal {
 
 RUNTIME_FUNCTION(Runtime_AtomicsWait) {
   HandleScope scope(isolate);
-  DCHECK(args.length() == 4);
+  DCHECK_EQ(4, args.length());
   CONVERT_ARG_HANDLE_CHECKED(JSTypedArray, sta, 0);
   CONVERT_SIZE_ARG_CHECKED(index, 1);
   CONVERT_INT32_ARG_CHECKED(value, 2);
   CONVERT_DOUBLE_ARG_CHECKED(timeout, 3);
   CHECK(sta->GetBuffer()->is_shared());
   CHECK_LT(index, NumberToSize(sta->length()));
   CHECK_EQ(sta->type(), kExternalInt32Array);
   CHECK(timeout == V8_INFINITY || !std::isnan(timeout));
 
   Handle<JSArrayBuffer> array_buffer = sta->GetBuffer();
   size_t addr = (index << 2) + NumberToSize(sta->byte_offset());
 
   return FutexEmulation::Wait(isolate, array_buffer, addr, value, timeout);
 }
 
 RUNTIME_FUNCTION(Runtime_AtomicsWake) {
   HandleScope scope(isolate);
-  DCHECK(args.length() == 3);
+  DCHECK_EQ(3, args.length());
   CONVERT_ARG_HANDLE_CHECKED(JSTypedArray, sta, 0);
   CONVERT_SIZE_ARG_CHECKED(index, 1);
   CONVERT_INT32_ARG_CHECKED(count, 2);
   CHECK(sta->GetBuffer()->is_shared());
   CHECK_LT(index, NumberToSize(sta->length()));
   CHECK_EQ(sta->type(), kExternalInt32Array);
 
   Handle<JSArrayBuffer> array_buffer = sta->GetBuffer();
   size_t addr = (index << 2) + NumberToSize(sta->byte_offset());
 
   return FutexEmulation::Wake(isolate, array_buffer, addr, count);
 }
 
 RUNTIME_FUNCTION(Runtime_AtomicsNumWaitersForTesting) {
   HandleScope scope(isolate);
-  DCHECK(args.length() == 2);
+  DCHECK_EQ(2, args.length());
   CONVERT_ARG_HANDLE_CHECKED(JSTypedArray, sta, 0);
   CONVERT_SIZE_ARG_CHECKED(index, 1);
   CHECK(sta->GetBuffer()->is_shared());
   CHECK_LT(index, NumberToSize(sta->length()));
   CHECK_EQ(sta->type(), kExternalInt32Array);
 
   Handle<JSArrayBuffer> array_buffer = sta->GetBuffer();
   size_t addr = (index << 2) + NumberToSize(sta->byte_offset());
 
   return FutexEmulation::NumWaitersForTesting(isolate, array_buffer, addr);
 }
 }  // namespace internal
 }  // namespace v8