Quelle testPreserveJitCode.cpp Sprache: C

/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "mozilla/Utf8.h"  // mozilla::Utf8Unit

#include "jit/Ion.h"                      // js::jit::IsIonEnabled
#include "js/CallAndConstruct.h"          // JS::CallFunction
#include "js/CompilationAndEvaluation.h"  // JS::CompileFunction
#include "js/EnvironmentChain.h"          // JS::EnvironmentChain
#include "js/GlobalObject.h"              // JS_NewGlobalObject
#include "js/SourceText.h"                // JS::Source{Ownership,Text}
#include "jsapi-tests/tests.h"
#include "util/Text.h"

#include "vm/JSObject-inl.h"
#include "vm/JSScript-inl.h"

using namespace JS;

static void ScriptCallback(JSRuntime* rt, void* data, js::BaseScript* script,
                           const JS::AutoRequireNoGC& nogc) {
  unsigned& count = *static_cast<unsigned*>(data);
  if (script->asJSScript()->hasIonScript()) {
    ++count;
  }
}

BEGIN_TEST(test_PreserveJitCode) {
  CHECK(testPreserveJitCode(false, 0));
  CHECK(testPreserveJitCode(true, 1));
  return true;
}

unsigned countIonScripts(JSObject* global) {
  unsigned count = 0;
  js::IterateScripts(cx, global->nonCCWRealm(), &count, ScriptCallback);
  return count;
}

bool testPreserveJitCode(bool preserveJitCode, unsigned remainingIonScripts) {
  cx->runtime()->setOffthreadIonCompilationEnabled(false);

  RootedObject global(cx, createTestGlobal(preserveJitCode));
  CHECK(global);
  JSAutoRealm ar(cx, global);

  // The Ion JIT may be unavailable due to --disable-jit or lack of support
  // for this platform.
  if (!js::jit::IsIonEnabled(cx)) {
    knownFail = true;
  }

  CHECK_EQUAL(countIonScripts(global), 0u);

  static constexpr char source[] =
      "var i = 0;\n"
      "var sum = 0;\n"
      "while (i < 10) {\n"
      " sum += i;\n"
      " ++i;\n"
      "}\n"
      "return sum;\n";
  constexpr unsigned length = js_strlen(source);

  JS::SourceText<mozilla::Utf8Unit> srcBuf;
  CHECK(srcBuf.init(cx, source, length, JS::SourceOwnership::Borrowed));

  JS::CompileOptions options(cx);
  options.setFileAndLine(__FILE__, 1);

  JS::RootedFunction fun(cx);
  JS::EnvironmentChain emptyEnvChain(cx, JS::SupportUnscopables::No);
  fun =
      JS::CompileFunction(cx, emptyEnvChain, options, "f", 0, nullptr, srcBuf);
  CHECK(fun);

  RootedValue value(cx);
  for (unsigned i = 0; i < 1500; ++i) {
    CHECK(JS_CallFunction(cx, global, fun, JS::HandleValueArray::empty(),
                          &value));
  }
  CHECK_EQUAL(value.toInt32(), 45);
  CHECK_EQUAL(countIonScripts(global), 1u);

  NonIncrementalGC(cx, JS::GCOptions::Normal, GCReason::API);
  CHECK_EQUAL(countIonScripts(global), remainingIonScripts);

  NonIncrementalGC(cx, JS::GCOptions::Shrink, GCReason::API);
  CHECK_EQUAL(countIonScripts(global), 0u);

  return true;
}

JSObject* createTestGlobal(bool preserveJitCode) {
  JS::RealmOptions options;
  options.creationOptions().setPreserveJitCode(preserveJitCode);
  return JS_NewGlobalObject(cx, getGlobalClass(), nullptr,
                            JS::FireOnNewGlobalHook, options);
}
END_TEST(test_PreserveJitCode)

quality94%

¤ Dauer der Verarbeitung: 0.16 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung ist noch experimentell.