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/x87/debug-x87.cc b/src/debug/x87/debug-x87.cc
new file mode 100644
index 0000000..8c04e02
--- /dev/null
+++ b/src/debug/x87/debug-x87.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_X87
+
+#include "src/codegen.h"
+#include "src/debug/debug.h"
+#include "src/x87/frames-x87.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);
+
+ // Add a label for checking the size of the code used for returning.
+ Label check_codesize;
+ patcher.masm()->bind(&check_codesize);
+ patcher.masm()->call(code->entry(), RelocInfo::NONE32);
+ // 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(Immediate(Smi::FromInt(LiveEdit::kFramePaddingValue)));
+ }
+ __ push(Immediate(Smi::FromInt(LiveEdit::kFramePaddingInitialSize)));
+
+ if (mode == SAVE_RESULT_REGISTER) __ push(eax);
+
+ __ Move(eax, Immediate(0)); // No arguments.
+ __ mov(ebx,
+ Immediate(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)};
+ __ Move(reg, Immediate(kDebugZapValue));
+ }
+ }
+
+ if (mode == SAVE_RESULT_REGISTER) __ pop(eax);
+
+ __ pop(ebx);
+ // We divide stored value by 2 (untagging) and multiply it by word's size.
+ STATIC_ASSERT(kSmiTagSize == 1 && kSmiShiftSize == 0);
+ __ lea(esp, Operand(esp, ebx, times_half_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.
+ __ add(esp, Immediate(kPointerSize));
+
+ // 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());
+ __ jmp(Operand::StaticVariable(after_break_target));
+}
+
+
+void DebugCodegen::GenerateFrameDropperLiveEdit(MacroAssembler* masm) {
+ // We do not know our frame height, but set esp based on ebp.
+ __ lea(esp, Operand(ebp, -1 * kPointerSize));
+
+ __ pop(edi); // Function.
+ __ pop(ebp);
+
+ ParameterCount dummy(0);
+ __ FloodFunctionIfStepping(edi, no_reg, dummy, dummy);
+
+ // Load context from the function.
+ __ mov(esi, FieldOperand(edi, JSFunction::kContextOffset));
+
+ // Clear new.target register as a safety measure.
+ __ mov(edx, masm->isolate()->factory()->undefined_value());
+
+ // Get function code.
+ __ mov(ebx, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset));
+ __ mov(ebx, FieldOperand(ebx, SharedFunctionInfo::kCodeOffset));
+ __ lea(ebx, FieldOperand(ebx, Code::kHeaderSize));
+
+ // Re-run JSFunction, edi is function, esi is context.
+ __ jmp(ebx);
+}
+
+
+const bool LiveEdit::kFrameDropperSupported = true;
+
+#undef __
+
+} // namespace internal
+} // namespace v8
+
+#endif // V8_TARGET_ARCH_X87