webkitgtk-2.4.11webkitgtk-2.4.11

1 files changed, 52 insertions, 24 deletions

diff --git a/Source/JavaScriptCore/llint/LLIntThunks.cpp b/Source/JavaScriptCore/llint/LLIntThunks.cpp
index af6884e5e..9429e6cb5 100644
--- a/Source/JavaScriptCore/llint/LLIntThunks.cpp
+++ b/Source/JavaScriptCore/llint/LLIntThunks.cpp
@@ -29,7 +29,6 @@
 #include "CallData.h"
 #include "ExceptionHelpers.h"
 #include "Interpreter.h"
-#include "JSCJSValueInlines.h"
 #include "JSInterfaceJIT.h"
 #include "JSObject.h"
 #include "JSStackInlines.h"
@@ -37,12 +36,12 @@
 #include "LinkBuffer.h"
 #include "LowLevelInterpreter.h"
 #include "ProtoCallFrame.h"
-#include "StackAlignment.h"
 #include "VM.h"
 
 namespace JSC {
 
 #if ENABLE(JIT)
+#if ENABLE(LLINT)
 
 namespace LLInt {
 
@@ -54,71 +53,100 @@ static MacroAssemblerCodeRef generateThunkWithJumpTo(VM* vm, void (*target)(), c
     jit.move(JSInterfaceJIT::TrustedImmPtr(bitwise_cast<void*>(target)), JSInterfaceJIT::regT0);
     jit.jump(JSInterfaceJIT::regT0);
     
-    LinkBuffer patchBuffer(*vm, jit, GLOBAL_THUNK_ID);
+    LinkBuffer patchBuffer(*vm, &jit, GLOBAL_THUNK_ID);
     return FINALIZE_CODE(patchBuffer, ("LLInt %s prologue thunk", thunkKind));
 }
 
 MacroAssemblerCodeRef functionForCallEntryThunkGenerator(VM* vm)
 {
-    return generateThunkWithJumpTo(vm, LLInt::getCodeFunctionPtr(llint_function_for_call_prologue), "function for call");
+    return generateThunkWithJumpTo(vm, llint_function_for_call_prologue, "function for call");
 }
 
 MacroAssemblerCodeRef functionForConstructEntryThunkGenerator(VM* vm)
 {
-    return generateThunkWithJumpTo(vm, LLInt::getCodeFunctionPtr(llint_function_for_construct_prologue), "function for construct");
+    return generateThunkWithJumpTo(vm, llint_function_for_construct_prologue, "function for construct");
 }
 
 MacroAssemblerCodeRef functionForCallArityCheckThunkGenerator(VM* vm)
 {
-    return generateThunkWithJumpTo(vm, LLInt::getCodeFunctionPtr(llint_function_for_call_arity_check), "function for call with arity check");
+    return generateThunkWithJumpTo(vm, llint_function_for_call_arity_check, "function for call with arity check");
 }
 
 MacroAssemblerCodeRef functionForConstructArityCheckThunkGenerator(VM* vm)
 {
-    return generateThunkWithJumpTo(vm, LLInt::getCodeFunctionPtr(llint_function_for_construct_arity_check), "function for construct with arity check");
+    return generateThunkWithJumpTo(vm, llint_function_for_construct_arity_check, "function for construct with arity check");
 }
 
 MacroAssemblerCodeRef evalEntryThunkGenerator(VM* vm)
 {
-    return generateThunkWithJumpTo(vm, LLInt::getCodeFunctionPtr(llint_eval_prologue), "eval");
+    return generateThunkWithJumpTo(vm, llint_eval_prologue, "eval");
 }
 
 MacroAssemblerCodeRef programEntryThunkGenerator(VM* vm)
 {
-    return generateThunkWithJumpTo(vm, LLInt::getCodeFunctionPtr(llint_program_prologue), "program");
-}
-
-MacroAssemblerCodeRef moduleProgramEntryThunkGenerator(VM* vm)
-{
-    return generateThunkWithJumpTo(vm, LLInt::getCodeFunctionPtr(llint_module_program_prologue), "module_program");
+    return generateThunkWithJumpTo(vm, llint_program_prologue, "program");
 }
 
 } // namespace LLInt
 
+#endif // ENABLE(LLINT)
 #else // ENABLE(JIT)
 
 // Non-JIT (i.e. C Loop LLINT) case:
 
-EncodedJSValue vmEntryToJavaScript(void* executableAddress, VM* vm, ProtoCallFrame* protoCallFrame)
+typedef JSValue (*ExecuteCode) (CallFrame*, void* executableAddress);
+
+template<ExecuteCode execute>
+EncodedJSValue doCallToJavaScript(void* executableAddress, ProtoCallFrame* protoCallFrame)
 {
-    JSValue result = CLoop::execute(llint_vm_entry_to_javascript, executableAddress, vm, protoCallFrame);
+    CodeBlock* codeBlock = protoCallFrame->codeBlock();
+    JSScope* scope = protoCallFrame->scope();
+    JSObject* callee = protoCallFrame->callee();
+    int argCountIncludingThis = protoCallFrame->argumentCountIncludingThis();
+    int argCount = protoCallFrame->argumentCount();
+    JSValue thisValue = protoCallFrame->thisValue();
+    JSStack& stack = scope->vm()->interpreter->stack();
+
+    CallFrame* newCallFrame = stack.pushFrame(codeBlock, scope, argCountIncludingThis, callee);
+    if (UNLIKELY(!newCallFrame)) {
+        JSGlobalObject* globalObject = scope->globalObject();
+        ExecState* exec = globalObject->globalExec();
+        return JSValue::encode(throwStackOverflowError(exec));
+    }
+
+    // Set the arguments for the callee:
+    newCallFrame->setThisValue(thisValue);
+    for (int i = 0; i < argCount; ++i)
+        newCallFrame->setArgument(i, protoCallFrame->argument(i));
+
+    JSValue result = execute(newCallFrame, executableAddress);
+
+    stack.popFrame(newCallFrame);
+
     return JSValue::encode(result);
 }
 
-EncodedJSValue vmEntryToNative(void* executableAddress, VM* vm, ProtoCallFrame* protoCallFrame)
+static inline JSValue executeJS(CallFrame* newCallFrame, void* executableAddress)
 {
-    JSValue result = CLoop::execute(llint_vm_entry_to_native, executableAddress, vm, protoCallFrame);
-    return JSValue::encode(result);
+    Opcode entryOpcode = *reinterpret_cast<Opcode*>(&executableAddress);
+    return CLoop::execute(newCallFrame, entryOpcode);
 }
 
-extern "C" VMEntryRecord* vmEntryRecord(VMEntryFrame* entryFrame)
+EncodedJSValue callToJavaScript(void* executableAddress, ExecState**, ProtoCallFrame* protoCallFrame, Register*)
 {
-    // The C Loop doesn't have any callee save registers, so the VMEntryRecord is allocated at the base of the frame.
-    intptr_t stackAlignment = stackAlignmentBytes();
-    intptr_t VMEntryTotalFrameSize = (sizeof(VMEntryRecord) + (stackAlignment - 1)) & ~(stackAlignment - 1);
-    return reinterpret_cast<VMEntryRecord*>(static_cast<char*>(entryFrame) - VMEntryTotalFrameSize);
+    return doCallToJavaScript<executeJS>(executableAddress, protoCallFrame);
 }
 
+static inline JSValue executeNative(CallFrame* newCallFrame, void* executableAddress)
+{
+    NativeFunction function = reinterpret_cast<NativeFunction>(executableAddress);
+    return JSValue::decode(function(newCallFrame));
+}
+
+EncodedJSValue callToNativeFunction(void* executableAddress, ExecState**, ProtoCallFrame* protoCallFrame, Register*)
+{
+    return doCallToJavaScript<executeNative>(executableAddress, protoCallFrame);
+}
 
 #endif // ENABLE(JIT)