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macro-assembler.h
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27 
28 #ifndef V8_MACRO_ASSEMBLER_H_
29 #define V8_MACRO_ASSEMBLER_H_
30 
31 
32 // Helper types to make boolean flag easier to read at call-site.
33 enum InvokeFlag {
36 };
37 
38 
39 // Invalid depth in prototype chain.
40 const int kInvalidProtoDepth = -1;
41 
42 #if V8_TARGET_ARCH_IA32
43 #include "assembler.h"
44 #include "ia32/assembler-ia32.h"
46 #include "code.h" // must be after assembler_*.h
48 #elif V8_TARGET_ARCH_X64
49 #include "assembler.h"
50 #include "x64/assembler-x64.h"
51 #include "x64/assembler-x64-inl.h"
52 #include "code.h" // must be after assembler_*.h
54 #elif V8_TARGET_ARCH_ARM
55 #include "arm/constants-arm.h"
56 #include "assembler.h"
57 #include "arm/assembler-arm.h"
58 #include "arm/assembler-arm-inl.h"
59 #include "code.h" // must be after assembler_*.h
61 #elif V8_TARGET_ARCH_MIPS
62 #include "mips/constants-mips.h"
63 #include "assembler.h"
64 #include "mips/assembler-mips.h"
66 #include "code.h" // must be after assembler_*.h
68 #else
69 #error Unsupported target architecture.
70 #endif
71 
72 namespace v8 {
73 namespace internal {
74 
75 class FrameScope {
76  public:
77  explicit FrameScope(MacroAssembler* masm, StackFrame::Type type)
78  : masm_(masm), type_(type), old_has_frame_(masm->has_frame()) {
79  masm->set_has_frame(true);
80  if (type != StackFrame::MANUAL && type_ != StackFrame::NONE) {
81  masm->EnterFrame(type);
82  }
83  }
84 
86  if (type_ != StackFrame::MANUAL && type_ != StackFrame::NONE) {
87  masm_->LeaveFrame(type_);
88  }
89  masm_->set_has_frame(old_has_frame_);
90  }
91 
92  // Normally we generate the leave-frame code when this object goes
93  // out of scope. Sometimes we may need to generate the code somewhere else
94  // in addition. Calling this will achieve that, but the object stays in
95  // scope, the MacroAssembler is still marked as being in a frame scope, and
96  // the code will be generated again when it goes out of scope.
98  masm_->LeaveFrame(type_);
99  }
100 
101  private:
102  MacroAssembler* masm_;
103  StackFrame::Type type_;
104  bool old_has_frame_;
105 };
106 
107 
109  public:
111  : FrameScope(masm, StackFrame::NONE) { }
112 };
113 
114 
116  public:
118  : masm_(masm), saved_(masm->has_frame()) {
119  masm->set_has_frame(false);
120  }
121 
123  masm_->set_has_frame(saved_);
124  }
125 
126  private:
127  MacroAssembler* masm_;
128  bool saved_;
129 };
130 
131 
132 // Support for "structured" code comments.
133 #ifdef DEBUG
134 
135 class Comment {
136  public:
137  Comment(MacroAssembler* masm, const char* msg);
138  ~Comment();
139 
140  private:
141  MacroAssembler* masm_;
142  const char* msg_;
143 };
144 
145 #else
146 
147 class Comment {
148  public:
149  Comment(MacroAssembler*, const char*) {}
150 };
151 
152 #endif // DEBUG
153 
154 } } // namespace v8::internal
155 
156 #endif // V8_MACRO_ASSEMBLER_H_
HANDLE HANDLE LPSTACKFRAME64 StackFrame
void LeaveFrame(StackFrame::Type type)
NoCurrentFrameScope(MacroAssembler *masm)
FrameScope(MacroAssembler *masm, StackFrame::Type type)
InvokeFlag
const int kInvalidProtoDepth
void EnterFrame(StackFrame::Type type)
Comment(MacroAssembler *, const char *)