Upgrade V8 to version 4.9.385.28
https://chromium.googlesource.com/v8/v8/+/4.9.385.28
FPIIM-449
Change-Id: I4b2e74289d4bf3667f2f3dc8aa2e541f63e26eb4
diff --git a/src/debug/x64/debug-x64.cc b/src/debug/x64/debug-x64.cc
new file mode 100644
index 0000000..0d56ea7
--- /dev/null
+++ b/src/debug/x64/debug-x64.cc
@@ -0,0 +1,141 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#if V8_TARGET_ARCH_X64
+
+#include "src/assembler.h"
+#include "src/codegen.h"
+#include "src/debug/debug.h"
+
+
+namespace v8 {
+namespace internal {
+
+#define __ ACCESS_MASM(masm)
+
+
+void EmitDebugBreakSlot(MacroAssembler* masm) {
+ Label check_codesize;
+ __ bind(&check_codesize);
+ __ Nop(Assembler::kDebugBreakSlotLength);
+ DCHECK_EQ(Assembler::kDebugBreakSlotLength,
+ masm->SizeOfCodeGeneratedSince(&check_codesize));
+}
+
+
+void DebugCodegen::GenerateSlot(MacroAssembler* masm, RelocInfo::Mode mode) {
+ // Generate enough nop's to make space for a call instruction.
+ masm->RecordDebugBreakSlot(mode);
+ EmitDebugBreakSlot(masm);
+}
+
+
+void DebugCodegen::ClearDebugBreakSlot(Isolate* isolate, Address pc) {
+ CodePatcher patcher(isolate, pc, Assembler::kDebugBreakSlotLength);
+ EmitDebugBreakSlot(patcher.masm());
+}
+
+
+void DebugCodegen::PatchDebugBreakSlot(Isolate* isolate, Address pc,
+ Handle<Code> code) {
+ DCHECK_EQ(Code::BUILTIN, code->kind());
+ static const int kSize = Assembler::kDebugBreakSlotLength;
+ CodePatcher patcher(isolate, pc, kSize);
+ Label check_codesize;
+ patcher.masm()->bind(&check_codesize);
+ patcher.masm()->movp(kScratchRegister, reinterpret_cast<void*>(code->entry()),
+ Assembler::RelocInfoNone());
+ patcher.masm()->call(kScratchRegister);
+ // Check that the size of the code generated is as expected.
+ DCHECK_EQ(kSize, patcher.masm()->SizeOfCodeGeneratedSince(&check_codesize));
+}
+
+
+void DebugCodegen::GenerateDebugBreakStub(MacroAssembler* masm,
+ DebugBreakCallHelperMode mode) {
+ __ RecordComment("Debug break");
+
+ // Enter an internal frame.
+ {
+ FrameScope scope(masm, StackFrame::INTERNAL);
+
+ // Load padding words on stack.
+ for (int i = 0; i < LiveEdit::kFramePaddingInitialSize; i++) {
+ __ Push(Smi::FromInt(LiveEdit::kFramePaddingValue));
+ }
+ __ Push(Smi::FromInt(LiveEdit::kFramePaddingInitialSize));
+
+ if (mode == SAVE_RESULT_REGISTER) __ Push(rax);
+
+ __ Set(rax, 0); // No arguments (argc == 0).
+ __ Move(rbx, ExternalReference(Runtime::FunctionForId(Runtime::kDebugBreak),
+ masm->isolate()));
+
+ CEntryStub ceb(masm->isolate(), 1);
+ __ CallStub(&ceb);
+
+ if (FLAG_debug_code) {
+ for (int i = 0; i < kNumJSCallerSaved; ++i) {
+ Register reg = {JSCallerSavedCode(i)};
+ __ Set(reg, kDebugZapValue);
+ }
+ }
+
+ if (mode == SAVE_RESULT_REGISTER) __ Pop(rax);
+
+ // Read current padding counter and skip corresponding number of words.
+ __ Pop(kScratchRegister);
+ __ SmiToInteger32(kScratchRegister, kScratchRegister);
+ __ leap(rsp, Operand(rsp, kScratchRegister, times_pointer_size, 0));
+
+ // Get rid of the internal frame.
+ }
+
+ // This call did not replace a call , so there will be an unwanted
+ // return address left on the stack. Here we get rid of that.
+ __ addp(rsp, Immediate(kPCOnStackSize));
+
+ // Now that the break point has been handled, resume normal execution by
+ // jumping to the target address intended by the caller and that was
+ // overwritten by the address of DebugBreakXXX.
+ ExternalReference after_break_target =
+ ExternalReference::debug_after_break_target_address(masm->isolate());
+ __ Move(kScratchRegister, after_break_target);
+ __ Jump(Operand(kScratchRegister, 0));
+}
+
+
+void DebugCodegen::GenerateFrameDropperLiveEdit(MacroAssembler* masm) {
+ // We do not know our frame height, but set rsp based on rbp.
+ __ leap(rsp, Operand(rbp, -1 * kPointerSize));
+
+ __ Pop(rdi); // Function.
+ __ popq(rbp);
+
+ ParameterCount dummy(0);
+ __ FloodFunctionIfStepping(rdi, no_reg, dummy, dummy);
+
+ // Load context from the function.
+ __ movp(rsi, FieldOperand(rdi, JSFunction::kContextOffset));
+
+ // Clear new.target as a safety measure.
+ __ LoadRoot(rdx, Heap::kUndefinedValueRootIndex);
+
+ // Get function code.
+ __ movp(rbx, FieldOperand(rdi, JSFunction::kSharedFunctionInfoOffset));
+ __ movp(rbx, FieldOperand(rbx, SharedFunctionInfo::kCodeOffset));
+ __ leap(rbx, FieldOperand(rbx, Code::kHeaderSize));
+
+ // Re-run JSFunction, rdi is function, rsi is context.
+ __ jmp(rbx);
+}
+
+const bool LiveEdit::kFrameDropperSupported = true;
+
+#undef __
+
+} // namespace internal
+} // namespace v8
+
+#endif // V8_TARGET_ARCH_X64