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/mips/debug-mips.cc b/src/debug/mips/debug-mips.cc
new file mode 100644
index 0000000..c5c58d0
--- /dev/null
+++ b/src/debug/mips/debug-mips.cc
@@ -0,0 +1,143 @@
+// 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_MIPS
+
+#include "src/codegen.h"
+#include "src/debug/debug.h"
+
+namespace v8 {
+namespace internal {
+
+#define __ ACCESS_MASM(masm)
+
+
+void EmitDebugBreakSlot(MacroAssembler* masm) {
+ Label check_size;
+ __ bind(&check_size);
+ for (int i = 0; i < Assembler::kDebugBreakSlotInstructions; i++) {
+ __ nop(MacroAssembler::DEBUG_BREAK_NOP);
+ }
+ DCHECK_EQ(Assembler::kDebugBreakSlotInstructions,
+ masm->InstructionsGeneratedSince(&check_size));
+}
+
+
+void DebugCodegen::GenerateSlot(MacroAssembler* masm, RelocInfo::Mode mode) {
+ // Generate enough nop's to make space for a call instruction. Avoid emitting
+ // the trampoline pool in the debug break slot code.
+ Assembler::BlockTrampolinePoolScope block_pool(masm);
+ masm->RecordDebugBreakSlot(mode);
+ EmitDebugBreakSlot(masm);
+}
+
+
+void DebugCodegen::ClearDebugBreakSlot(Isolate* isolate, Address pc) {
+ CodePatcher patcher(isolate, pc, Assembler::kDebugBreakSlotInstructions);
+ EmitDebugBreakSlot(patcher.masm());
+}
+
+
+void DebugCodegen::PatchDebugBreakSlot(Isolate* isolate, Address pc,
+ Handle<Code> code) {
+ DCHECK_EQ(Code::BUILTIN, code->kind());
+ CodePatcher patcher(isolate, pc, Assembler::kDebugBreakSlotInstructions);
+ // Patch the code changing the debug break slot code from:
+ // nop(DEBUG_BREAK_NOP) - nop(1) is sll(zero_reg, zero_reg, 1)
+ // nop(DEBUG_BREAK_NOP)
+ // nop(DEBUG_BREAK_NOP)
+ // nop(DEBUG_BREAK_NOP)
+ // to a call to the debug break slot code.
+ // li t9, address (lui t9 / ori t9 instruction pair)
+ // call t9 (jalr t9 / nop instruction pair)
+ patcher.masm()->li(v8::internal::t9,
+ Operand(reinterpret_cast<int32_t>(code->entry())));
+ patcher.masm()->Call(v8::internal::t9);
+}
+
+
+void DebugCodegen::GenerateDebugBreakStub(MacroAssembler* masm,
+ DebugBreakCallHelperMode mode) {
+ __ RecordComment("Debug break");
+ {
+ FrameScope scope(masm, StackFrame::INTERNAL);
+
+ // Load padding words on stack.
+ __ li(at, Operand(Smi::FromInt(LiveEdit::kFramePaddingValue)));
+ __ Subu(sp, sp,
+ Operand(kPointerSize * LiveEdit::kFramePaddingInitialSize));
+ for (int i = LiveEdit::kFramePaddingInitialSize - 1; i >= 0; i--) {
+ __ sw(at, MemOperand(sp, kPointerSize * i));
+ }
+ __ li(at, Operand(Smi::FromInt(LiveEdit::kFramePaddingInitialSize)));
+ __ push(at);
+
+ if (mode == SAVE_RESULT_REGISTER) __ push(v0);
+
+ __ PrepareCEntryArgs(0); // No arguments.
+ __ PrepareCEntryFunction(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)};
+ __ li(reg, kDebugZapValue);
+ }
+ }
+
+ if (mode == SAVE_RESULT_REGISTER) __ pop(v0);
+
+ // Don't bother removing padding bytes pushed on the stack
+ // as the frame is going to be restored right away.
+
+ // Leave the internal frame.
+ }
+
+ // 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());
+ __ li(t9, Operand(after_break_target));
+ __ lw(t9, MemOperand(t9));
+ __ Jump(t9);
+}
+
+
+void DebugCodegen::GenerateFrameDropperLiveEdit(MacroAssembler* masm) {
+ // We do not know our frame height, but set sp based on fp.
+ __ Subu(sp, fp, Operand(kPointerSize));
+
+ __ Pop(ra, fp, a1); // Return address, Frame, Function.
+
+ ParameterCount dummy(0);
+ __ FloodFunctionIfStepping(a1, no_reg, dummy, dummy);
+
+ // Load context from the function.
+ __ lw(cp, FieldMemOperand(a1, JSFunction::kContextOffset));
+
+ // Clear new.target as a safety measure.
+ __ LoadRoot(a3, Heap::kUndefinedValueRootIndex);
+
+ // Get function code.
+ __ lw(at, FieldMemOperand(a1, JSFunction::kSharedFunctionInfoOffset));
+ __ lw(at, FieldMemOperand(at, SharedFunctionInfo::kCodeOffset));
+ __ Addu(t9, at, Operand(Code::kHeaderSize - kHeapObjectTag));
+
+ // Re-run JSFunction, a1 is function, cp is context.
+ __ Jump(t9);
+}
+
+
+const bool LiveEdit::kFrameDropperSupported = true;
+
+#undef __
+
+} // namespace internal
+} // namespace v8
+
+#endif // V8_TARGET_ARCH_MIPS