Line data    Source code

       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             : 
      20          56 : void DebugCodegen::GenerateHandleDebuggerStatement(MacroAssembler* masm) {
      21             :   {
      22          56 :     FrameScope scope(masm, StackFrame::INTERNAL);
      23          56 :     __ CallRuntime(Runtime::kHandleDebuggerStatement, 0);
      24             :   }
      25          56 :   __ MaybeDropFrames();
      26             : 
      27             :   // Return to caller.
      28          56 :   __ ret(0);
      29          56 : }
      30             : 
      31          56 : 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             : 
      38             :   Register decompr_scratch_for_debug =
      39          56 :       COMPRESS_POINTERS_BOOL ? kScratchRegister : no_reg;
      40             : 
      41          56 :   __ movp(rbp, rbx);
      42         112 :   __ movp(rdi, Operand(rbp, JavaScriptFrameConstants::kFunctionOffset));
      43          56 :   __ leave();
      44             : 
      45             :   __ LoadTaggedPointerField(
      46             :       rbx, FieldOperand(rdi, JSFunction::kSharedFunctionInfoOffset),
      47          56 :       decompr_scratch_for_debug);
      48             :   __ movzxwq(
      49             :       rbx, FieldOperand(rbx, SharedFunctionInfo::kFormalParameterCountOffset));
      50             : 
      51             :   ParameterCount dummy(rbx);
      52          56 :   __ InvokeFunction(rdi, no_reg, dummy, dummy, JUMP_FUNCTION);
      53          56 : }
      54             : 
      55             : const bool LiveEdit::kFrameDropperSupported = true;
      56             : 
      57             : #undef __
      58             : 
      59             : }  // namespace internal
      60      183867 : }  // namespace v8
      61             : 
      62             : #endif  // V8_TARGET_ARCH_X64