1 files changed, 120 insertions, 0 deletions
diff --git a/deps/v8/test/cctest/wasm/test-wasm-function-name-table.cc b/deps/v8/test/cctest/wasm/test-wasm-function-name-table.cc
new file mode 100644
index 0000000000..1ae78dcb4e
--- /dev/null
+++ b/deps/v8/test/cctest/wasm/test-wasm-function-name-table.cc
@@ -0,0 +1,120 @@
+// Copyright 2016 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/wasm/wasm-function-name-table.h"
+#include "src/wasm/wasm-module.h"
+
+#include "test/cctest/cctest.h"
+
+using namespace v8::internal;
+using namespace v8::internal::wasm;
+
+namespace {
+
+#define CHECK_STREQ(exp, found)                                                \
+  do {                                                                         \
+    Vector<const char> exp_ = (exp);                                           \
+    Vector<const char> found_ = (found);                                       \
+    if (V8_UNLIKELY(exp_.length() != found_.length() ||                        \
+                    memcmp(exp_.start(), found_.start(), exp_.length()))) {    \
+      V8_Fatal(__FILE__, __LINE__,                                             \
+               "Check failed: (%s) != (%s) ('%.*s' vs '%.*s').", #exp, #found, \
+               exp_.length(), exp_.start(), found_.length(), found_.start());  \
+    }                                                                          \
+  } while (0)
+
+void testFunctionNameTable(Vector<Vector<const char>> names) {
+  Isolate *isolate = CcTest::InitIsolateOnce();
+  HandleAndZoneScope scope;
+
+  WasmModule module;
+  std::vector<char> all_names;
+  // No name should have offset 0, because that encodes unnamed functions.
+  // In real wasm binary, offset 0 is impossible anyway.
+  all_names.push_back('\0');
+
+  uint32_t func_index = 0;
+  for (Vector<const char> name : names) {
+    size_t name_offset = name.start() ? all_names.size() : 0;
+    all_names.insert(all_names.end(), name.start(),
+                     name.start() + name.length());
+    // Make every second function name null-terminated.
+    if (func_index % 2) all_names.push_back('\0');
+    module.functions.push_back({nullptr, 0, 0,
+                                static_cast<uint32_t>(name_offset),
+                                static_cast<uint32_t>(name.length()), 0, 0});
+    ++func_index;
+  }
+
+  module.module_start = reinterpret_cast<byte *>(all_names.data());
+  module.module_end = module.module_start + all_names.size();
+
+  Handle<Object> wasm_function_name_table =
+      BuildFunctionNamesTable(isolate, &module);
+  CHECK(wasm_function_name_table->IsByteArray());
+
+  func_index = 0;
+  for (Vector<const char> name : names) {
+    MaybeHandle<String> string = GetWasmFunctionNameFromTable(
+        Handle<ByteArray>::cast(wasm_function_name_table), func_index);
+    if (name.start()) {
+      CHECK(string.ToHandleChecked()->IsUtf8EqualTo(name));
+    } else {
+      CHECK(string.is_null());
+    }
+    ++func_index;
+  }
+}
+
+void testFunctionNameTable(Vector<const char *> names) {
+  std::vector<Vector<const char>> names_vec;
+  for (const char *name : names)
+    names_vec.push_back(name ? CStrVector(name) : Vector<const char>());
+  testFunctionNameTable(Vector<Vector<const char>>(
+      names_vec.data(), static_cast<int>(names_vec.size())));
+}
+
+}  // namespace
+
+TEST(NoFunctions) { testFunctionNameTable(Vector<Vector<const char>>()); }
+
+TEST(OneFunctions) {
+  const char *names[] = {"foo"};
+  testFunctionNameTable(ArrayVector(names));
+}
+
+TEST(ThreeFunctions) {
+  const char *names[] = {"foo", "bar", "baz"};
+  testFunctionNameTable(ArrayVector(names));
+}
+
+TEST(OneUnnamedFunction) {
+  const char *names[] = {""};
+  testFunctionNameTable(ArrayVector(names));
+}
+
+TEST(UnnamedFirstFunction) {
+  const char *names[] = {"", "bar", "baz"};
+  testFunctionNameTable(ArrayVector(names));
+}
+
+TEST(UnnamedLastFunction) {
+  const char *names[] = {"bar", "baz", ""};
+  testFunctionNameTable(ArrayVector(names));
+}
+
+TEST(ThreeUnnamedFunctions) {
+  const char *names[] = {"", "", ""};
+  testFunctionNameTable(ArrayVector(names));
+}
+
+TEST(UTF8Names) {
+  const char *names[] = {"↱fun↰", "↺", "alpha:α beta:β"};
+  testFunctionNameTable(ArrayVector(names));
+}
+
+TEST(UnnamedVsEmptyNames) {
+  const char *names[] = {"", nullptr, nullptr, ""};
+  testFunctionNameTable(ArrayVector(names));
+}