tor-browser

The Tor Browser
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testPrivateGCThingValue.cpp (1970B)

      1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
      2 * vim: set ts=8 sts=2 et sw=2 tw=80:
      3 */
      4 /* This Source Code Form is subject to the terms of the Mozilla Public
      5 * License, v. 2.0. If a copy of the MPL was not distributed with this
      6 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      7 
      8 #include "mozilla/Utf8.h"  // mozilla::Utf8Unit
      9 
     10 #include "jsapi.h"
     11 
     12 #include "js/CompilationAndEvaluation.h"  // JS::Compile
     13 #include "js/HeapAPI.h"
     14 #include "js/SourceText.h"  // JS::Source{Ownership,Text}
     15 #include "jsapi-tests/tests.h"
     16 #include "util/Text.h"
     17 
     18 class TestTracer final : public JS::CallbackTracer {
     19  void onChild(JS::GCCellPtr thing, const char* name) override {
     20    if (thing.asCell() == expectedCell && thing.kind() == expectedKind) {
     21      found = true;
     22    }
     23  }
     24 
     25 public:
     26  js::gc::Cell* expectedCell;
     27  JS::TraceKind expectedKind;
     28  bool found;
     29 
     30  explicit TestTracer(JSContext* cx)
     31      : JS::CallbackTracer(cx),
     32        expectedCell(nullptr),
     33        expectedKind(static_cast<JS::TraceKind>(0)),
     34        found(false) {}
     35 };
     36 
     37 static const JSClass TestClass = {
     38    "TestClass",
     39    JSCLASS_HAS_RESERVED_SLOTS(1),
     40 };
     41 
     42 BEGIN_TEST(testPrivateGCThingValue) {
     43  JS::RootedObject obj(cx, JS_NewObject(cx, &TestClass));
     44  CHECK(obj);
     45 
     46  // Make a JSScript to stick into a PrivateGCThingValue.
     47  static const char code[] = "'objet petit a'";
     48 
     49  JS::CompileOptions options(cx);
     50  options.setFileAndLine(__FILE__, __LINE__);
     51 
     52  JS::SourceText<mozilla::Utf8Unit> srcBuf;
     53  CHECK(srcBuf.init(cx, code, js_strlen(code), JS::SourceOwnership::Borrowed));
     54 
     55  JS::RootedScript script(cx, JS::Compile(cx, options, srcBuf));
     56  CHECK(script);
     57  JS_SetReservedSlot(obj, 0, PrivateGCThingValue(script));
     58 
     59  TestTracer trc(cx);
     60  trc.expectedCell = script;
     61  trc.expectedKind = JS::TraceKind::Script;
     62  JS::TraceChildren(&trc, JS::GCCellPtr(obj, JS::TraceKind::Object));
     63  CHECK(trc.found);
     64 
     65  return true;
     66 }
     67 END_TEST(testPrivateGCThingValue)