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      1 // Copyright 2012 the V8 project authors. All rights reserved.
      2 // Redistribution and use in source and binary forms, with or without
      3 // modification, are permitted provided that the following conditions are
      4 // met:
      5 //
      6 //     * Redistributions of source code must retain the above copyright
      7 //       notice, this list of conditions and the following disclaimer.
      8 //     * Redistributions in binary form must reproduce the above
      9 //       copyright notice, this list of conditions and the following
     10 //       disclaimer in the documentation and/or other materials provided
     11 //       with the distribution.
     12 //     * Neither the name of Google Inc. nor the names of its
     13 //       contributors may be used to endorse or promote products derived
     14 //       from this software without specific prior written permission.
     15 //
     16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     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 {
     34   CALL_FUNCTION,
     35   JUMP_FUNCTION
     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"
     45 #include "ia32/assembler-ia32-inl.h"
     46 #include "code.h"  // must be after assembler_*.h
     47 #include "ia32/macro-assembler-ia32.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
     53 #include "x64/macro-assembler-x64.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
     60 #include "arm/macro-assembler-arm.h"
     61 #elif V8_TARGET_ARCH_MIPS
     62 #include "mips/constants-mips.h"
     63 #include "assembler.h"
     64 #include "mips/assembler-mips.h"
     65 #include "mips/assembler-mips-inl.h"
     66 #include "code.h"  // must be after assembler_*.h
     67 #include "mips/macro-assembler-mips.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 
     85   ~FrameScope() {
     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.
     97   void GenerateLeaveFrame() {
     98     masm_->LeaveFrame(type_);
     99   }
    100 
    101  private:
    102   MacroAssembler* masm_;
    103   StackFrame::Type type_;
    104   bool old_has_frame_;
    105 };
    106 
    107 
    108 class AllowExternalCallThatCantCauseGC: public FrameScope {
    109  public:
    110   explicit AllowExternalCallThatCantCauseGC(MacroAssembler* masm)
    111       : FrameScope(masm, StackFrame::NONE) { }
    112 };
    113 
    114 
    115 class NoCurrentFrameScope {
    116  public:
    117   explicit NoCurrentFrameScope(MacroAssembler* masm)
    118       : masm_(masm), saved_(masm->has_frame()) {
    119     masm->set_has_frame(false);
    120   }
    121 
    122   ~NoCurrentFrameScope() {
    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_
    157