1 // Copyright 2012 the V8 project authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #if V8_TARGET_ARCH_X64
6
7 #include "src/debug/debug.h"
8
9 #include "src/assembler.h"
10 #include "src/debug/liveedit.h"
11 #include "src/frames-inl.h"
12 #include "src/macro-assembler.h"
13 #include "src/objects-inl.h"
14
15 namespace v8 {
16 namespace internal {
17
18 #define __ ACCESS_MASM(masm)
19
GenerateHandleDebuggerStatement(MacroAssembler * masm)20 void DebugCodegen::GenerateHandleDebuggerStatement(MacroAssembler* masm) {
21 {
22 FrameScope scope(masm, StackFrame::INTERNAL);
23 __ CallRuntime(Runtime::kHandleDebuggerStatement, 0);
24 }
25 __ MaybeDropFrames();
26
27 // Return to caller.
28 __ ret(0);
29 }
30
GenerateFrameDropperTrampoline(MacroAssembler * masm)31 void DebugCodegen::GenerateFrameDropperTrampoline(MacroAssembler* masm) {
32 // Frame is being dropped:
33 // - Drop to the target frame specified by rbx.
34 // - Look up current function on the frame.
35 // - Leave the frame.
36 // - Restart the frame by calling the function.
37 __ movp(rbp, rbx);
38 __ movp(rdi, Operand(rbp, JavaScriptFrameConstants::kFunctionOffset));
39 __ leave();
40
41 __ movp(rbx, FieldOperand(rdi, JSFunction::kSharedFunctionInfoOffset));
42 __ movzxwq(
43 rbx, FieldOperand(rbx, SharedFunctionInfo::kFormalParameterCountOffset));
44
45 ParameterCount dummy(rbx);
46 __ InvokeFunction(rdi, no_reg, dummy, dummy, JUMP_FUNCTION);
47 }
48
49 const bool LiveEdit::kFrameDropperSupported = true;
50
51 #undef __
52
53 } // namespace internal
54 } // namespace v8
55
56 #endif // V8_TARGET_ARCH_X64
57