LCOV - code coverage report
Current view: top level - src/runtime - runtime-utils.h (source / functions) Hit Total Coverage
Test: app.info Lines: 5 5 100.0 %
Date: 2017-04-26 Functions: 2 2 100.0 %

          Line data    Source code
       1             : // Copyright 2014 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             : #ifndef V8_RUNTIME_RUNTIME_UTILS_H_
       6             : #define V8_RUNTIME_RUNTIME_UTILS_H_
       7             : 
       8             : #include "src/base/logging.h"
       9             : #include "src/globals.h"
      10             : #include "src/runtime/runtime.h"
      11             : 
      12             : namespace v8 {
      13             : namespace internal {
      14             : 
      15             : // Cast the given object to a value of the specified type and store
      16             : // it in a variable with the given name.  If the object is not of the
      17             : // expected type we crash safely.
      18             : #define CONVERT_ARG_CHECKED(Type, name, index) \
      19             :   CHECK(args[index]->Is##Type());              \
      20             :   Type* name = Type::cast(args[index]);
      21             : 
      22             : #define CONVERT_ARG_HANDLE_CHECKED(Type, name, index) \
      23             :   CHECK(args[index]->Is##Type());                     \
      24             :   Handle<Type> name = args.at<Type>(index);
      25             : 
      26             : #define CONVERT_NUMBER_ARG_HANDLE_CHECKED(name, index) \
      27             :   CHECK(args[index]->IsNumber());                      \
      28             :   Handle<Object> name = args.at(index);
      29             : 
      30             : // Cast the given object to a boolean and store it in a variable with
      31             : // the given name.  If the object is not a boolean we crash safely.
      32             : #define CONVERT_BOOLEAN_ARG_CHECKED(name, index) \
      33             :   CHECK(args[index]->IsBoolean());               \
      34             :   bool name = args[index]->IsTrue(isolate);
      35             : 
      36             : // Cast the given argument to a Smi and store its value in an int variable
      37             : // with the given name.  If the argument is not a Smi we crash safely.
      38             : #define CONVERT_SMI_ARG_CHECKED(name, index) \
      39             :   CHECK(args[index]->IsSmi());               \
      40             :   int name = args.smi_at(index);
      41             : 
      42             : // Cast the given argument to a double and store it in a variable with
      43             : // the given name.  If the argument is not a number (as opposed to
      44             : // the number not-a-number) we crash safely.
      45             : #define CONVERT_DOUBLE_ARG_CHECKED(name, index) \
      46             :   CHECK(args[index]->IsNumber());               \
      47             :   double name = args.number_at(index);
      48             : 
      49             : // Cast the given argument to a size_t and store its value in a variable with
      50             : // the given name.  If the argument is not a size_t we crash safely.
      51             : #define CONVERT_SIZE_ARG_CHECKED(name, index)    \
      52             :   CHECK(args[index]->IsNumber());                \
      53             :   Handle<Object> name##_object = args.at(index); \
      54             :   size_t name = 0;                               \
      55             :   CHECK(TryNumberToSize(*name##_object, &name));
      56             : 
      57             : // Call the specified converter on the object *comand store the result in
      58             : // a variable of the specified type with the given name.  If the
      59             : // object is not a Number we crash safely.
      60             : #define CONVERT_NUMBER_CHECKED(type, name, Type, obj) \
      61             :   CHECK(obj->IsNumber());                             \
      62             :   type name = NumberTo##Type(obj);
      63             : 
      64             : // Cast the given argument to PropertyDetails and store its value in a
      65             : // variable with the given name.  If the argument is not a Smi we crash safely.
      66             : #define CONVERT_PROPERTY_DETAILS_CHECKED(name, index) \
      67             :   CHECK(args[index]->IsSmi());                        \
      68             :   PropertyDetails name = PropertyDetails(Smi::cast(args[index]));
      69             : 
      70             : // Assert that the given argument has a valid value for a LanguageMode
      71             : // and store it in a LanguageMode variable with the given name.
      72             : #define CONVERT_LANGUAGE_MODE_ARG_CHECKED(name, index) \
      73             :   CHECK(args[index]->IsNumber());                      \
      74             :   int32_t __tmp_##name = 0;                            \
      75             :   CHECK(args[index]->ToInt32(&__tmp_##name));          \
      76             :   CHECK(is_valid_language_mode(__tmp_##name));         \
      77             :   LanguageMode name = static_cast<LanguageMode>(__tmp_##name);
      78             : 
      79             : // Assert that the given argument is a number within the Int32 range
      80             : // and convert it to int32_t.  If the argument is not an Int32 we crash safely.
      81             : #define CONVERT_INT32_ARG_CHECKED(name, index) \
      82             :   CHECK(args[index]->IsNumber());              \
      83             :   int32_t name = 0;                            \
      84             :   CHECK(args[index]->ToInt32(&name));
      85             : 
      86             : // Assert that the given argument is a number within the Uint32 range
      87             : // and convert it to uint32_t.  If the argument is not an Uint32 call
      88             : // IllegalOperation and return.
      89             : #define CONVERT_UINT32_ARG_CHECKED(name, index) \
      90             :   CHECK(args[index]->IsNumber());               \
      91             :   uint32_t name = 0;                            \
      92             :   CHECK(args[index]->ToUint32(&name));
      93             : 
      94             : // Cast the given argument to PropertyAttributes and store its value in a
      95             : // variable with the given name.  If the argument is not a Smi or the
      96             : // enum value is out of range, we crash safely.
      97             : #define CONVERT_PROPERTY_ATTRIBUTES_CHECKED(name, index)                     \
      98             :   CHECK(args[index]->IsSmi());                                               \
      99             :   CHECK((args.smi_at(index) & ~(READ_ONLY | DONT_ENUM | DONT_DELETE)) == 0); \
     100             :   PropertyAttributes name = static_cast<PropertyAttributes>(args.smi_at(index));
     101             : 
     102             : // A mechanism to return a pair of Object pointers in registers (if possible).
     103             : // How this is achieved is calling convention-dependent.
     104             : // All currently supported x86 compiles uses calling conventions that are cdecl
     105             : // variants where a 64-bit value is returned in two 32-bit registers
     106             : // (edx:eax on ia32, r1:r0 on ARM).
     107             : // In AMD-64 calling convention a struct of two pointers is returned in rdx:rax.
     108             : // In Win64 calling convention, a struct of two pointers is returned in memory,
     109             : // allocated by the caller, and passed as a pointer in a hidden first parameter.
     110             : #ifdef V8_HOST_ARCH_64_BIT
     111             : struct ObjectPair {
     112             :   Object* x;
     113             :   Object* y;
     114             : };
     115             : 
     116             : 
     117      285749 : static inline ObjectPair MakePair(Object* x, Object* y) {
     118             :   ObjectPair result = {x, y};
     119             :   // Pointers x and y returned in rax and rdx, in AMD-x64-abi.
     120             :   // In Win64 they are assigned to a hidden first argument.
     121      285749 :   return result;
     122             : }
     123             : #elif V8_TARGET_ARCH_X64 && V8_TARGET_ARCH_32_BIT
     124             : // For x32 a 128-bit struct return is done as rax and rdx from the ObjectPair
     125             : // are used in the full codegen and Crankshaft compiler. An alternative is
     126             : // using uint64_t and modifying full codegen and Crankshaft compiler.
     127             : struct ObjectPair {
     128             :   Object* x;
     129             :   uint32_t x_upper;
     130             :   Object* y;
     131             :   uint32_t y_upper;
     132             : };
     133             : 
     134             : 
     135             : static inline ObjectPair MakePair(Object* x, Object* y) {
     136             :   ObjectPair result = {x, 0, y, 0};
     137             :   // Pointers x and y returned in rax and rdx, in x32-abi.
     138             :   return result;
     139             : }
     140             : #else
     141             : typedef uint64_t ObjectPair;
     142             : static inline ObjectPair MakePair(Object* x, Object* y) {
     143             : #if defined(V8_TARGET_LITTLE_ENDIAN)
     144             :   return reinterpret_cast<uint32_t>(x) |
     145             :          (reinterpret_cast<ObjectPair>(y) << 32);
     146             : #elif defined(V8_TARGET_BIG_ENDIAN)
     147             :   return reinterpret_cast<uint32_t>(y) |
     148             :          (reinterpret_cast<ObjectPair>(x) << 32);
     149             : #else
     150             : #error Unknown endianness
     151             : #endif
     152             : }
     153             : #endif
     154             : 
     155             : 
     156             : // A mechanism to return a triple of Object pointers. In all calling
     157             : // conventions, a struct of two pointers is returned in memory,
     158             : // allocated by the caller, and passed as a pointer in a hidden first parameter.
     159             : struct ObjectTriple {
     160             :   Object* x;
     161             :   Object* y;
     162             :   Object* z;
     163             : };
     164             : 
     165       52337 : static inline ObjectTriple MakeTriple(Object* x, Object* y, Object* z) {
     166       52337 :   ObjectTriple result = {x, y, z};
     167             :   // ObjectTriple is assigned to a hidden first argument.
     168       52337 :   return result;
     169             : }
     170             : 
     171             : }  // namespace internal
     172             : }  // namespace v8
     173             : 
     174             : #endif  // V8_RUNTIME_RUNTIME_UTILS_H_

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