1 files changed, 71 insertions, 0 deletions
diff --git a/third_party/wasm2c/src/tracing.cc b/third_party/wasm2c/src/tracing.cc
new file mode 100644
index 0000000000..21f512f587
--- /dev/null
+++ b/third_party/wasm2c/src/tracing.cc
@@ -0,0 +1,71 @@
+/*
+ * Copyright 2017 WebAssembly Community Group participants
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define WABT_TRACING 1
+#include "wabt/tracing.h"
+
+namespace {
+
+size_t indent = 0;
+const char* indent_text = "  ";
+
+void Fill() {
+  for (size_t i = 0; i < indent; ++i)
+    fputs(indent_text, stderr);
+}
+
+void Indent() {
+  Fill();
+  ++indent;
+}
+
+void Dedent() {
+  if (indent) {
+    --indent;
+  }
+  Fill();
+}
+
+}  // end of anonymous namespace
+
+namespace wabt {
+
+// static
+
+TraceScope::TraceScope(const char* method) : method_(method) {
+  PrintEnter(method);
+  PrintNewline();
+}
+
+TraceScope::~TraceScope() {
+  Dedent();
+  fputs("<- ", stderr);
+  fputs(method_, stderr);
+  fputc('\n', stderr);
+}
+
+void TraceScope::PrintEnter(const char* method) {
+  Indent();
+  fputs("-> ", stderr);
+  fputs(method, stderr);
+  fputs("(", stderr);
+}
+
+void TraceScope::PrintNewline() {
+  fputs(")\n", stderr);
+}
+
+}  // end of namespace wabt