webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 73 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/jit/CCallHelpers.cpp b/Source/JavaScriptCore/jit/CCallHelpers.cpp
new file mode 100644
index 000000000..3c3df618f
--- /dev/null
+++ b/Source/JavaScriptCore/jit/CCallHelpers.cpp
@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2016 Apple Inc. All rights reserved.
+ *
+ * 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 "CCallHelpers.h"
+
+#if ENABLE(JIT)
+
+#include "ShadowChicken.h"
+
+namespace JSC {
+
+void CCallHelpers::logShadowChickenProloguePacket(GPRReg shadowPacket, GPRReg scratch1, GPRReg scope)
+{
+    storePtr(GPRInfo::callFrameRegister, Address(shadowPacket, OBJECT_OFFSETOF(ShadowChicken::Packet, frame)));
+    loadPtr(Address(GPRInfo::callFrameRegister, OBJECT_OFFSETOF(CallerFrameAndPC, callerFrame)), scratch1);
+    storePtr(scratch1, Address(shadowPacket, OBJECT_OFFSETOF(ShadowChicken::Packet, callerFrame)));
+    loadPtr(addressFor(CallFrameSlot::callee), scratch1);
+    storePtr(scratch1, Address(shadowPacket, OBJECT_OFFSETOF(ShadowChicken::Packet, callee)));
+    storePtr(scope, Address(shadowPacket, OBJECT_OFFSETOF(ShadowChicken::Packet, scope)));
+}
+
+void CCallHelpers::logShadowChickenTailPacket(GPRReg shadowPacket, JSValueRegs thisRegs, GPRReg scope, CodeBlock* codeBlock, CallSiteIndex callSiteIndex)
+{
+    storePtr(GPRInfo::callFrameRegister, Address(shadowPacket, OBJECT_OFFSETOF(ShadowChicken::Packet, frame)));
+    storePtr(TrustedImmPtr(ShadowChicken::Packet::tailMarker()), Address(shadowPacket, OBJECT_OFFSETOF(ShadowChicken::Packet, callee)));
+    storeValue(thisRegs, Address(shadowPacket, OBJECT_OFFSETOF(ShadowChicken::Packet, thisValue)));
+    storePtr(scope, Address(shadowPacket, OBJECT_OFFSETOF(ShadowChicken::Packet, scope)));
+    storePtr(TrustedImmPtr(codeBlock), Address(shadowPacket, OBJECT_OFFSETOF(ShadowChicken::Packet, codeBlock)));
+    store32(TrustedImm32(callSiteIndex.bits()), Address(shadowPacket, OBJECT_OFFSETOF(ShadowChicken::Packet, callSiteIndex)));
+}
+
+void CCallHelpers::ensureShadowChickenPacket(GPRReg shadowPacket, GPRReg scratch1NonArgGPR, GPRReg scratch2)
+{
+    ASSERT(!RegisterSet::argumentGPRS().get(scratch1NonArgGPR));
+    move(TrustedImmPtr(vm()->shadowChicken().addressOfLogCursor()), scratch1NonArgGPR);
+    loadPtr(Address(scratch1NonArgGPR), shadowPacket);
+    Jump ok = branchPtr(Below, shadowPacket, TrustedImmPtr(vm()->shadowChicken().logEnd()));
+    setupArgumentsExecState();
+    move(TrustedImmPtr(bitwise_cast<void*>(operationProcessShadowChickenLog)), scratch1NonArgGPR);
+    call(scratch1NonArgGPR);
+    move(TrustedImmPtr(vm()->shadowChicken().addressOfLogCursor()), scratch1NonArgGPR);
+    loadPtr(Address(scratch1NonArgGPR), shadowPacket);
+    ok.link(this);
+    addPtr(TrustedImm32(sizeof(ShadowChicken::Packet)), shadowPacket, scratch2);
+    storePtr(scratch2, Address(scratch1NonArgGPR));
+}
+
+} // namespace JSC
+
+#endif // ENABLE(JIT)