webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 84 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/bytecode/ModuleNamespaceAccessCase.cpp b/Source/JavaScriptCore/bytecode/ModuleNamespaceAccessCase.cpp
new file mode 100644
index 000000000..3c168c6c9
--- /dev/null
+++ b/Source/JavaScriptCore/bytecode/ModuleNamespaceAccessCase.cpp
@@ -0,0 +1,84 @@
+/*
+ * Copyright (C) 2017 Yusuke Suzuki <utatane.tea@gmail.com>.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "ModuleNamespaceAccessCase.h"
+
+#if ENABLE(JIT)
+
+#include "CCallHelpers.h"
+#include "HeapInlines.h"
+#include "JSModuleEnvironment.h"
+#include "JSModuleNamespaceObject.h"
+#include "PolymorphicAccess.h"
+#include "StructureStubInfo.h"
+
+namespace JSC {
+
+ModuleNamespaceAccessCase::ModuleNamespaceAccessCase(VM& vm, JSCell* owner, JSModuleNamespaceObject* moduleNamespaceObject, JSModuleEnvironment* moduleEnvironment, ScopeOffset scopeOffset)
+    : Base(vm, owner, ModuleNamespaceLoad, invalidOffset, nullptr, ObjectPropertyConditionSet())
+    , m_scopeOffset(scopeOffset)
+{
+    m_moduleNamespaceObject.set(vm, owner, moduleNamespaceObject);
+    m_moduleEnvironment.set(vm, owner, moduleEnvironment);
+}
+
+std::unique_ptr<AccessCase> ModuleNamespaceAccessCase::create(VM& vm, JSCell* owner, JSModuleNamespaceObject* moduleNamespaceObject, JSModuleEnvironment* moduleEnvironment, ScopeOffset scopeOffset)
+{
+    return std::unique_ptr<AccessCase>(new ModuleNamespaceAccessCase(vm, owner, moduleNamespaceObject, moduleEnvironment, scopeOffset));
+}
+
+ModuleNamespaceAccessCase::~ModuleNamespaceAccessCase()
+{
+}
+
+std::unique_ptr<AccessCase> ModuleNamespaceAccessCase::clone() const
+{
+    std::unique_ptr<ModuleNamespaceAccessCase> result(new ModuleNamespaceAccessCase(*this));
+    result->resetState();
+    return WTFMove(result);
+}
+
+void ModuleNamespaceAccessCase::emit(AccessGenerationState& state, MacroAssembler::JumpList& fallThrough)
+{
+    CCallHelpers& jit = *state.jit;
+    JSValueRegs valueRegs = state.valueRegs;
+    GPRReg baseGPR = state.baseGPR;
+
+    fallThrough.append(
+        jit.branchPtr(
+            CCallHelpers::NotEqual,
+            baseGPR,
+            CCallHelpers::TrustedImmPtr(m_moduleNamespaceObject.get())));
+
+    jit.loadValue(&m_moduleEnvironment->variableAt(m_scopeOffset), valueRegs);
+    state.failAndIgnore.append(jit.branchIfEmpty(valueRegs));
+    state.succeed();
+}
+
+
+} // namespace JSC
+
+#endif // ENABLE(JIT)