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Split globals.h into two parts, where only one depends on V8.

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Made allocation.{h,cc} independent of V8, allowing utils.h to allocate
vectors and collectors.

Review URL: http://codereview.chromium.org/5005001

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@5826 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
This commit is contained in:
lrn@chromium.org 2010-11-15 13:23:30 +00:00
parent 2a8eb35548
commit af7b6fecfe
12 changed files with 522 additions and 456 deletions
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26
include/v8.h
View File

@ -3282,8 +3282,8 @@ class V8EXPORT OutputStream { // NOLINT
namespace internal {
const int kPointerSize = sizeof(void*); // NOLINT
const int kIntSize = sizeof(int); // NOLINT
static const int kApiPointerSize = sizeof(void*); // NOLINT
static const int kApiIntSize = sizeof(int); // NOLINT
// Tag information for HeapObject.
const int kHeapObjectTag = 1;
@ -3319,19 +3319,19 @@ template <> struct SmiConstants<8> {
}
};
const int kSmiShiftSize = SmiConstants<kPointerSize>::kSmiShiftSize;
const int kSmiValueSize = SmiConstants<kPointerSize>::kSmiValueSize;
const int kSmiShiftSize = SmiConstants<kApiPointerSize>::kSmiShiftSize;
const int kSmiValueSize = SmiConstants<kApiPointerSize>::kSmiValueSize;
template <size_t ptr_size> struct InternalConstants;
// Internal constants for 32-bit systems.
template <> struct InternalConstants<4> {
static const int kStringResourceOffset = 3 * kPointerSize;
static const int kStringResourceOffset = 3 * kApiPointerSize;
};
// Internal constants for 64-bit systems.
template <> struct InternalConstants<8> {
static const int kStringResourceOffset = 3 * kPointerSize;
static const int kStringResourceOffset = 3 * kApiPointerSize;
};
/**
@ -3345,12 +3345,12 @@ class Internals {
// These values match non-compiler-dependent values defined within
// the implementation of v8.
static const int kHeapObjectMapOffset = 0;
static const int kMapInstanceTypeOffset = kPointerSize + kIntSize;
static const int kMapInstanceTypeOffset = kApiPointerSize + kApiIntSize;
static const int kStringResourceOffset =
InternalConstants<kPointerSize>::kStringResourceOffset;
InternalConstants<kApiPointerSize>::kStringResourceOffset;
static const int kProxyProxyOffset = kPointerSize;
static const int kJSObjectHeaderSize = 3 * kPointerSize;
static const int kProxyProxyOffset = kApiPointerSize;
static const int kJSObjectHeaderSize = 3 * kApiPointerSize;
static const int kFullStringRepresentationMask = 0x07;
static const int kExternalTwoByteRepresentationTag = 0x02;
@ -3368,7 +3368,7 @@ class Internals {
}
static inline int SmiValue(internal::Object* value) {
return SmiConstants<kPointerSize>::SmiToInt(value);
return SmiConstants<kApiPointerSize>::SmiToInt(value);
}
static inline int GetInstanceType(internal::Object* obj) {
@ -3559,7 +3559,7 @@ Local<Value> Object::UncheckedGetInternalField(int index) {
// If the object is a plain JSObject, which is the common case,
// we know where to find the internal fields and can return the
// value directly.
int offset = I::kJSObjectHeaderSize + (internal::kPointerSize * index);
int offset = I::kJSObjectHeaderSize + (internal::kApiPointerSize * index);
O* value = I::ReadField<O*>(obj, offset);
O** result = HandleScope::CreateHandle(value);
return Local<Value>(reinterpret_cast<Value*>(result));
@ -3595,7 +3595,7 @@ void* Object::GetPointerFromInternalField(int index) {
// If the object is a plain JSObject, which is the common case,
// we know where to find the internal fields and can return the
// value directly.
int offset = I::kJSObjectHeaderSize + (internal::kPointerSize * index);
int offset = I::kJSObjectHeaderSize + (internal::kApiPointerSize * index);
O* value = I::ReadField<O*>(obj, offset);
return I::GetExternalPointer(value);
}

18
src/allocation.cc
View File

@ -27,16 +27,21 @@
#include <stdlib.h>
#include "v8.h"
#include "../include/v8stdint.h"
#include "globals.h"
#include "checks.h"
#include "allocation.h"
#include "utils.h"
namespace v8 {
namespace internal {
void* Malloced::New(size_t size) {
ASSERT(NativeAllocationChecker::allocation_allowed());
void* result = malloc(size);
if (result == NULL) V8::FatalProcessOutOfMemory("Malloced operator new");
if (result == NULL) {
v8::internal::FatalProcessOutOfMemory("Malloced operator new");
}
return result;
}
@ -47,7 +52,7 @@ void Malloced::Delete(void* p) {
void Malloced::FatalProcessOutOfMemory() {
V8::FatalProcessOutOfMemory("Out of memory");
v8::internal::FatalProcessOutOfMemory("Out of memory");
}
@ -82,7 +87,7 @@ void AllStatic::operator delete(void* p) {
char* StrDup(const char* str) {
int length = StrLength(str);
char* result = NewArray<char>(length + 1);
memcpy(result, str, length * kCharSize);
memcpy(result, str, length);
result[length] = '\0';
return result;
}
@ -92,7 +97,7 @@ char* StrNDup(const char* str, int n) {
int length = StrLength(str);
if (n < length) length = n;
char* result = NewArray<char>(length + 1);
memcpy(result, str, length * kCharSize);
memcpy(result, str, length);
result[length] = '\0';
return result;
}
@ -124,6 +129,7 @@ void* PreallocatedStorage::New(size_t size) {
}
ASSERT(free_list_.next_ != &free_list_);
ASSERT(free_list_.previous_ != &free_list_);
size = (size + kPointerSize - 1) & ~(kPointerSize - 1);
// Search for exact fit.
for (PreallocatedStorage* storage = free_list_.next_;

4
src/allocation.h
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@ -31,6 +31,10 @@
namespace v8 {
namespace internal {
// Called when allocation routines fail to allocate.
// This function should not return, but should terminate the current
// processing.
void FatalProcessOutOfMemory(const char* message);
// A class that controls whether allocation is allowed. This is for
// the C++ heap only!

5
src/api.cc
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@ -115,7 +115,6 @@ static void DefaultFatalErrorHandler(const char* location,
}
static FatalErrorCallback& GetFatalErrorHandler() {
if (exception_behavior == NULL) {
exception_behavior = DefaultFatalErrorHandler;
@ -124,6 +123,10 @@ static FatalErrorCallback& GetFatalErrorHandler() {
}
void i::FatalProcessOutOfMemory(const char* location) {
i::V8::FatalProcessOutOfMemory(location, false);
}
// When V8 cannot allocated memory FatalProcessOutOfMemory is called.
// The default fatal error handler is called and execution is stopped.

2
src/checks.h
View File

@ -30,8 +30,6 @@
#include <string.h>
#include "../include/v8stdint.h"
extern "C" void V8_Fatal(const char* file, int line, const char* format, ...);
void API_Fatal(const char* location, const char* format, ...);

433
src/globals.h
View File

@ -1,4 +1,4 @@
// Copyright 2006-2009 the V8 project authors. All rights reserved.
// Copyright 2010 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
@ -193,9 +193,10 @@ const uint32_t kMaxUInt32 = 0xFFFFFFFFu;
const int kCharSize = sizeof(char); // NOLINT
const int kShortSize = sizeof(short); // NOLINT
const int kIntSize = sizeof(int); // NOLINT
const int kDoubleSize = sizeof(double); // NOLINT
const int kIntptrSize = sizeof(intptr_t); // NOLINT
// kIntSize and kPointerSize are defined in include/v8.h.
const int kPointerSize = sizeof(void*); // NOLINT
#if V8_HOST_ARCH_64_BIT
const int kPointerSizeLog2 = 3;
@ -207,38 +208,6 @@ const intptr_t kIntptrSignBit = 0x80000000;
const uintptr_t kUintptrAllBitsSet = 0xFFFFFFFFu;
#endif
// Mask for the sign bit in a smi.
const intptr_t kSmiSignMask = kIntptrSignBit;
const int kObjectAlignmentBits = kPointerSizeLog2;
const intptr_t kObjectAlignment = 1 << kObjectAlignmentBits;
const intptr_t kObjectAlignmentMask = kObjectAlignment - 1;
// Desired alignment for pointers.
const intptr_t kPointerAlignment = (1 << kPointerSizeLog2);
const intptr_t kPointerAlignmentMask = kPointerAlignment - 1;
// Desired alignment for maps.
#if V8_HOST_ARCH_64_BIT
const intptr_t kMapAlignmentBits = kObjectAlignmentBits;
#else
const intptr_t kMapAlignmentBits = kObjectAlignmentBits + 3;
#endif
const intptr_t kMapAlignment = (1 << kMapAlignmentBits);
const intptr_t kMapAlignmentMask = kMapAlignment - 1;
// Desired alignment for generated code is 32 bytes (to improve cache line
// utilization).
const int kCodeAlignmentBits = 5;
const intptr_t kCodeAlignment = 1 << kCodeAlignmentBits;
const intptr_t kCodeAlignmentMask = kCodeAlignment - 1;
// Tag information for Failure.
const int kFailureTag = 3;
const int kFailureTagSize = 2;
const intptr_t kFailureTagMask = (1 << kFailureTagSize) - 1;
const int kBitsPerByte = 8;
const int kBitsPerByteLog2 = 3;
const int kBitsPerPointer = kPointerSize * kBitsPerByte;
@ -254,364 +223,6 @@ const int kBinary32MinExponent = 0x01;
const int kBinary32MantissaBits = 23;
const int kBinary32ExponentShift = 23;
// Zap-value: The value used for zapping dead objects.
// Should be a recognizable hex value tagged as a heap object pointer.
#ifdef V8_HOST_ARCH_64_BIT
const Address kZapValue =
reinterpret_cast<Address>(V8_UINT64_C(0xdeadbeedbeadbeed));
const Address kHandleZapValue =
reinterpret_cast<Address>(V8_UINT64_C(0x1baddead0baddead));
const Address kFromSpaceZapValue =
reinterpret_cast<Address>(V8_UINT64_C(0x1beefdad0beefdad));
const uint64_t kDebugZapValue = 0xbadbaddbbadbaddb;
#else
const Address kZapValue = reinterpret_cast<Address>(0xdeadbeed);
const Address kHandleZapValue = reinterpret_cast<Address>(0xbaddead);
const Address kFromSpaceZapValue = reinterpret_cast<Address>(0xbeefdad);
const uint32_t kDebugZapValue = 0xbadbaddb;
#endif
// Number of bits to represent the page size for paged spaces. The value of 13
// gives 8K bytes per page.
const int kPageSizeBits = 13;
// On Intel architecture, cache line size is 64 bytes.
// On ARM it may be less (32 bytes), but as far this constant is
// used for aligning data, it doesn't hurt to align on a greater value.
const int kProcessorCacheLineSize = 64;
// Constants relevant to double precision floating point numbers.
// Quiet NaNs have bits 51 to 62 set, possibly the sign bit, and no
// other bits set.
const uint64_t kQuietNaNMask = static_cast<uint64_t>(0xfff) << 51;
// If looking only at the top 32 bits, the QNaN mask is bits 19 to 30.
const uint32_t kQuietNaNHighBitsMask = 0xfff << (51 - 32);
// -----------------------------------------------------------------------------
// Forward declarations for frequently used classes
// (sorted alphabetically)
class AccessorInfo;
class Allocation;
class Arguments;
class Assembler;
class AssertNoAllocation;
class BreakableStatement;
class Code;
class CodeGenerator;
class CodeStub;
class Context;
class Debug;
class Debugger;
class DebugInfo;
class Descriptor;
class DescriptorArray;
class Expression;
class ExternalReference;
class FixedArray;
class FunctionEntry;
class FunctionLiteral;
class FunctionTemplateInfo;
class NumberDictionary;
class StringDictionary;
class FreeStoreAllocationPolicy;
template <typename T> class Handle;
class Heap;
class HeapObject;
class IC;
class InterceptorInfo;
class IterationStatement;
class JSArray;
class JSFunction;
class JSObject;
class LargeObjectSpace;
template <typename T, class P = FreeStoreAllocationPolicy> class List;
class LookupResult;
class MacroAssembler;
class Map;
class MapSpace;
class MarkCompactCollector;
class NewSpace;
class NodeVisitor;
class Object;
class MaybeObject;
class OldSpace;
class Property;
class Proxy;
class RegExpNode;
struct RegExpCompileData;
class RegExpTree;
class RegExpCompiler;
class RegExpVisitor;
class Scope;
template<class Allocator = FreeStoreAllocationPolicy> class ScopeInfo;
class SerializedScopeInfo;
class Script;
class Slot;
class Smi;
template <typename Config, class Allocator = FreeStoreAllocationPolicy>
class SplayTree;
class Statement;
class String;
class Struct;
class SwitchStatement;
class AstVisitor;
class Variable;
class VariableProxy;
class RelocInfo;
class Deserializer;
class MessageLocation;
class ObjectGroup;
class TickSample;
class VirtualMemory;
class Mutex;
typedef bool (*WeakSlotCallback)(Object** pointer);
// -----------------------------------------------------------------------------
// Miscellaneous
// NOTE: SpaceIterator depends on AllocationSpace enumeration values being
// consecutive.
enum AllocationSpace {
NEW_SPACE, // Semispaces collected with copying collector.
OLD_POINTER_SPACE, // May contain pointers to new space.
OLD_DATA_SPACE, // Must not have pointers to new space.
CODE_SPACE, // No pointers to new space, marked executable.
MAP_SPACE, // Only and all map objects.
CELL_SPACE, // Only and all cell objects.
LO_SPACE, // Promoted large objects.
FIRST_SPACE = NEW_SPACE,
LAST_SPACE = LO_SPACE,
FIRST_PAGED_SPACE = OLD_POINTER_SPACE,
LAST_PAGED_SPACE = CELL_SPACE
};
const int kSpaceTagSize = 3;
const int kSpaceTagMask = (1 << kSpaceTagSize) - 1;
// A flag that indicates whether objects should be pretenured when
// allocated (allocated directly into the old generation) or not
// (allocated in the young generation if the object size and type
// allows).
enum PretenureFlag { NOT_TENURED, TENURED };
enum GarbageCollector { SCAVENGER, MARK_COMPACTOR };
enum Executability { NOT_EXECUTABLE, EXECUTABLE };
enum VisitMode { VISIT_ALL, VISIT_ALL_IN_SCAVENGE, VISIT_ONLY_STRONG };
// Flag indicating whether code is built into the VM (one of the natives files).
enum NativesFlag { NOT_NATIVES_CODE, NATIVES_CODE };
// A CodeDesc describes a buffer holding instructions and relocation
// information. The instructions start at the beginning of the buffer
// and grow forward, the relocation information starts at the end of
// the buffer and grows backward.
//
// |<--------------- buffer_size ---------------->|
// |<-- instr_size -->| |<-- reloc_size -->|
// +==================+========+==================+
// | instructions | free | reloc info |
// +==================+========+==================+
// ^
// |
// buffer
struct CodeDesc {
byte* buffer;
int buffer_size;
int instr_size;
int reloc_size;
Assembler* origin;
};
// Callback function on object slots, used for iterating heap object slots in
// HeapObjects, global pointers to heap objects, etc. The callback allows the
// callback function to change the value of the slot.
typedef void (*ObjectSlotCallback)(HeapObject** pointer);
// Callback function used for iterating objects in heap spaces,
// for example, scanning heap objects.
typedef int (*HeapObjectCallback)(HeapObject* obj);
// Callback function used for checking constraints when copying/relocating
// objects. Returns true if an object can be copied/relocated from its
// old_addr to a new_addr.
typedef bool (*ConstraintCallback)(Address new_addr, Address old_addr);
// Callback function on inline caches, used for iterating over inline caches
// in compiled code.
typedef void (*InlineCacheCallback)(Code* code, Address ic);
// State for inline cache call sites. Aliased as IC::State.
enum InlineCacheState {
// Has never been executed.
UNINITIALIZED,
// Has been executed but monomorhic state has been delayed.
PREMONOMORPHIC,
// Has been executed and only one receiver type has been seen.
MONOMORPHIC,
// Like MONOMORPHIC but check failed due to prototype.
MONOMORPHIC_PROTOTYPE_FAILURE,
// Multiple receiver types have been seen.
MEGAMORPHIC,
// Special states for debug break or step in prepare stubs.
DEBUG_BREAK,
DEBUG_PREPARE_STEP_IN
};
enum InLoopFlag {
NOT_IN_LOOP,
IN_LOOP
};
enum CallFunctionFlags {
NO_CALL_FUNCTION_FLAGS = 0,
RECEIVER_MIGHT_BE_VALUE = 1 << 0 // Receiver might not be a JSObject.
};
enum InlineCacheHolderFlag {
OWN_MAP, // For fast properties objects.
PROTOTYPE_MAP // For slow properties objects (except GlobalObjects).
};
// Type of properties.
// Order of properties is significant.
// Must fit in the BitField PropertyDetails::TypeField.
// A copy of this is in mirror-debugger.js.
enum PropertyType {
NORMAL = 0, // only in slow mode
FIELD = 1, // only in fast mode
CONSTANT_FUNCTION = 2, // only in fast mode
CALLBACKS = 3,
INTERCEPTOR = 4, // only in lookup results, not in descriptors.
MAP_TRANSITION = 5, // only in fast mode
CONSTANT_TRANSITION = 6, // only in fast mode
NULL_DESCRIPTOR = 7, // only in fast mode
// All properties before MAP_TRANSITION are real.
FIRST_PHANTOM_PROPERTY_TYPE = MAP_TRANSITION,
// There are no IC stubs for NULL_DESCRIPTORS. Therefore,
// NULL_DESCRIPTOR can be used as the type flag for IC stubs for
// nonexistent properties.
NONEXISTENT = NULL_DESCRIPTOR
};
// Whether to remove map transitions and constant transitions from a
// DescriptorArray.
enum TransitionFlag {
REMOVE_TRANSITIONS,
KEEP_TRANSITIONS
};
// Union used for fast testing of specific double values.
union DoubleRepresentation {
double value;
int64_t bits;
DoubleRepresentation(double x) { value = x; }
};
// Union used for customized checking of the IEEE double types
// inlined within v8 runtime, rather than going to the underlying
// platform headers and libraries
union IeeeDoubleLittleEndianArchType {
double d;
struct {
unsigned int man_low :32;
unsigned int man_high :20;
unsigned int exp :11;
unsigned int sign :1;
} bits;
};
union IeeeDoubleBigEndianArchType {
double d;
struct {
unsigned int sign :1;
unsigned int exp :11;
unsigned int man_high :20;
unsigned int man_low :32;
} bits;
};
// AccessorCallback
struct AccessorDescriptor {
MaybeObject* (*getter)(Object* object, void* data);
MaybeObject* (*setter)(JSObject* object, Object* value, void* data);
void* data;
};
// Logging and profiling.
// A StateTag represents a possible state of the VM. When compiled with
// ENABLE_VMSTATE_TRACKING, the logger maintains a stack of these.
// Creating a VMState object enters a state by pushing on the stack, and
// destroying a VMState object leaves a state by popping the current state
// from the stack.
#define STATE_TAG_LIST(V) \
V(JS) \
V(GC) \
V(COMPILER) \
V(OTHER) \
V(EXTERNAL)
enum StateTag {
#define DEF_STATE_TAG(name) name,
STATE_TAG_LIST(DEF_STATE_TAG)
#undef DEF_STATE_TAG
// Pseudo-types.
state_tag_count
};
// -----------------------------------------------------------------------------
// Macros
// Testers for test.
#define HAS_SMI_TAG(value) \
((reinterpret_cast<intptr_t>(value) & kSmiTagMask) == kSmiTag)
#define HAS_FAILURE_TAG(value) \
((reinterpret_cast<intptr_t>(value) & kFailureTagMask) == kFailureTag)
// OBJECT_POINTER_ALIGN returns the value aligned as a HeapObject pointer
#define OBJECT_POINTER_ALIGN(value) \
(((value) + kObjectAlignmentMask) & ~kObjectAlignmentMask)
// POINTER_SIZE_ALIGN returns the value aligned as a pointer.
#define POINTER_SIZE_ALIGN(value) \
(((value) + kPointerAlignmentMask) & ~kPointerAlignmentMask)
// MAP_POINTER_ALIGN returns the value aligned as a map pointer.
#define MAP_POINTER_ALIGN(value) \
(((value) + kMapAlignmentMask) & ~kMapAlignmentMask)
// CODE_POINTER_ALIGN returns the value aligned as a generated code segment.
#define CODE_POINTER_ALIGN(value) \
(((value) + kCodeAlignmentMask) & ~kCodeAlignmentMask)
// The expression OFFSET_OF(type, field) computes the byte-offset
// of the specified field relative to the containing type. This
// corresponds to 'offsetof' (in stddef.h), except that it doesn't
@ -668,26 +279,6 @@ F FUNCTION_CAST(Address addr) {
DISALLOW_COPY_AND_ASSIGN(TypeName)
// Support for tracking C++ memory allocation. Insert TRACK_MEMORY("Fisk")
// inside a C++ class and new and delete will be overloaded so logging is
// performed.
// This file (globals.h) is included before log.h, so we use direct calls to
// the Logger rather than the LOG macro.
#ifdef DEBUG
#define TRACK_MEMORY(name) \
void* operator new(size_t size) { \
void* result = ::operator new(size); \
Logger::NewEvent(name, result, size); \
return result; \
} \
void operator delete(void* object) { \
Logger::DeleteEvent(name, object); \
::operator delete(object); \
}
#else
#define TRACK_MEMORY(name)
#endif
// Define used for helping GCC to make better inlining. Don't bother for debug
// builds. On GCC 3.4.5 using __attribute__((always_inline)) causes compilation
// errors in debug build.
@ -711,20 +302,12 @@ F FUNCTION_CAST(Address addr) {
#define MUST_USE_RESULT
#endif
// -----------------------------------------------------------------------------
// Forward declarations for frequently used classes
// (sorted alphabetically)
// Feature flags bit positions. They are mostly based on the CPUID spec.
// (We assign CPUID itself to one of the currently reserved bits --
// feel free to change this if needed.)
// On X86/X64, values below 32 are bits in EDX, values above 32 are bits in ECX.
enum CpuFeature { SSE4_1 = 32 + 19, // x86
SSE3 = 32 + 0, // x86
SSE2 = 26, // x86
CMOV = 15, // x86
RDTSC = 4, // x86
CPUID = 10, // x86
VFP3 = 1, // ARM
ARMv7 = 2, // ARM
SAHF = 0}; // x86
class FreeStoreAllocationPolicy;
template <typename T, class P = FreeStoreAllocationPolicy> class List;
} } // namespace v8::internal

8
src/list.h
View File

@ -148,14 +148,6 @@ class List {
DISALLOW_COPY_AND_ASSIGN(List);
};
class FrameElement;
// Add() is inlined, ResizeAdd() called by Add() is inlined except for
// Lists of FrameElements, and ResizeAddInternal() is inlined in ResizeAdd().
template <>
void List<FrameElement,
FreeStoreAllocationPolicy>::ResizeAdd(const FrameElement& element);
} } // namespace v8::internal
#endif // V8_LIST_H_

1
src/scanner-base.cc
View File

@ -27,6 +27,7 @@
// Features shared by parsing and pre-parsing scanners.
#include "../include/v8stdint.h"
#include "scanner-base.h"
namespace v8 {

2
src/utils.h
View File

@ -31,7 +31,9 @@
#include <stdlib.h>
#include <string.h>
#include "globals.h"
#include "checks.h"
#include "allocation.h"
namespace v8 {
namespace internal {

2
src/v8.h
View File

@ -53,7 +53,7 @@
// Basic includes
#include "../include/v8.h"
#include "globals.h"
#include "v8globals.h"
#include "checks.h"
#include "allocation.h"
#include "v8utils.h"

464
src/v8globals.h Normal file
View File

@ -0,0 +1,464 @@
// Copyright 2010 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#ifndef V8_V8GLOBALS_H_
#define V8_V8GLOBALS_H_
#include "globals.h"
namespace v8 {
namespace internal {
// This file contains constants and global declarations related to the
// V8 system.
// Mask for the sign bit in a smi.
const intptr_t kSmiSignMask = kIntptrSignBit;
const int kObjectAlignmentBits = kPointerSizeLog2;
const intptr_t kObjectAlignment = 1 << kObjectAlignmentBits;
const intptr_t kObjectAlignmentMask = kObjectAlignment - 1;
// Desired alignment for pointers.
const intptr_t kPointerAlignment = (1 << kPointerSizeLog2);
const intptr_t kPointerAlignmentMask = kPointerAlignment - 1;
// Desired alignment for maps.
#if V8_HOST_ARCH_64_BIT
const intptr_t kMapAlignmentBits = kObjectAlignmentBits;
#else
const intptr_t kMapAlignmentBits = kObjectAlignmentBits + 3;
#endif
const intptr_t kMapAlignment = (1 << kMapAlignmentBits);
const intptr_t kMapAlignmentMask = kMapAlignment - 1;
// Desired alignment for generated code is 32 bytes (to improve cache line
// utilization).
const int kCodeAlignmentBits = 5;
const intptr_t kCodeAlignment = 1 << kCodeAlignmentBits;
const intptr_t kCodeAlignmentMask = kCodeAlignment - 1;
// Tag information for Failure.
const int kFailureTag = 3;
const int kFailureTagSize = 2;
const intptr_t kFailureTagMask = (1 << kFailureTagSize) - 1;
// Zap-value: The value used for zapping dead objects.
// Should be a recognizable hex value tagged as a heap object pointer.
#ifdef V8_HOST_ARCH_64_BIT
const Address kZapValue =
reinterpret_cast<Address>(V8_UINT64_C(0xdeadbeedbeadbeed));
const Address kHandleZapValue =
reinterpret_cast<Address>(V8_UINT64_C(0x1baddead0baddead));
const Address kFromSpaceZapValue =
reinterpret_cast<Address>(V8_UINT64_C(0x1beefdad0beefdad));
const uint64_t kDebugZapValue = 0xbadbaddbbadbaddb;
#else
const Address kZapValue = reinterpret_cast<Address>(0xdeadbeed);
const Address kHandleZapValue = reinterpret_cast<Address>(0xbaddead);
const Address kFromSpaceZapValue = reinterpret_cast<Address>(0xbeefdad);
const uint32_t kDebugZapValue = 0xbadbaddb;
#endif
// Number of bits to represent the page size for paged spaces. The value of 13
// gives 8K bytes per page.
const int kPageSizeBits = 13;
// On Intel architecture, cache line size is 64 bytes.
// On ARM it may be less (32 bytes), but as far this constant is
// used for aligning data, it doesn't hurt to align on a greater value.
const int kProcessorCacheLineSize = 64;
// Constants relevant to double precision floating point numbers.
// Quiet NaNs have bits 51 to 62 set, possibly the sign bit, and no
// other bits set.
const uint64_t kQuietNaNMask = static_cast<uint64_t>(0xfff) << 51;
// If looking only at the top 32 bits, the QNaN mask is bits 19 to 30.
const uint32_t kQuietNaNHighBitsMask = 0xfff << (51 - 32);
// -----------------------------------------------------------------------------
// Forward declarations for frequently used classes
// (sorted alphabetically)
class AccessorInfo;
class Allocation;
class Arguments;
class Assembler;
class AssertNoAllocation;
class BreakableStatement;
class Code;
class CodeGenerator;
class CodeStub;
class Context;
class Debug;
class Debugger;
class DebugInfo;
class Descriptor;
class DescriptorArray;
class Expression;
class ExternalReference;
class FixedArray;
class FunctionEntry;
class FunctionLiteral;
class FunctionTemplateInfo;
class NumberDictionary;
class StringDictionary;
template <typename T> class Handle;
class Heap;
class HeapObject;
class IC;
class InterceptorInfo;
class IterationStatement;
class JSArray;
class JSFunction;
class JSObject;
class LargeObjectSpace;
class LookupResult;
class MacroAssembler;
class Map;
class MapSpace;
class MarkCompactCollector;
class NewSpace;
class NodeVisitor;
class Object;
class MaybeObject;
class OldSpace;
class Property;
class Proxy;
class RegExpNode;
struct RegExpCompileData;
class RegExpTree;
class RegExpCompiler;
class RegExpVisitor;
class Scope;
template<class Allocator = FreeStoreAllocationPolicy> class ScopeInfo;
class SerializedScopeInfo;
class Script;
class Slot;
class Smi;
template <typename Config, class Allocator = FreeStoreAllocationPolicy>
class SplayTree;
class Statement;
class String;
class Struct;
class SwitchStatement;
class AstVisitor;
class Variable;
class VariableProxy;
class RelocInfo;
class Deserializer;
class MessageLocation;
class ObjectGroup;
class TickSample;
class VirtualMemory;
class Mutex;
typedef bool (*WeakSlotCallback)(Object** pointer);
// -----------------------------------------------------------------------------
// Miscellaneous
// NOTE: SpaceIterator depends on AllocationSpace enumeration values being
// consecutive.
enum AllocationSpace {
NEW_SPACE, // Semispaces collected with copying collector.
OLD_POINTER_SPACE, // May contain pointers to new space.
OLD_DATA_SPACE, // Must not have pointers to new space.
CODE_SPACE, // No pointers to new space, marked executable.
MAP_SPACE, // Only and all map objects.
CELL_SPACE, // Only and all cell objects.
LO_SPACE, // Promoted large objects.
FIRST_SPACE = NEW_SPACE,
LAST_SPACE = LO_SPACE,
FIRST_PAGED_SPACE = OLD_POINTER_SPACE,
LAST_PAGED_SPACE = CELL_SPACE
};
const int kSpaceTagSize = 3;
const int kSpaceTagMask = (1 << kSpaceTagSize) - 1;
// A flag that indicates whether objects should be pretenured when
// allocated (allocated directly into the old generation) or not
// (allocated in the young generation if the object size and type
// allows).
enum PretenureFlag { NOT_TENURED, TENURED };
enum GarbageCollector { SCAVENGER, MARK_COMPACTOR };
enum Executability { NOT_EXECUTABLE, EXECUTABLE };
enum VisitMode { VISIT_ALL, VISIT_ALL_IN_SCAVENGE, VISIT_ONLY_STRONG };
// Flag indicating whether code is built into the VM (one of the natives files).
enum NativesFlag { NOT_NATIVES_CODE, NATIVES_CODE };
// A CodeDesc describes a buffer holding instructions and relocation
// information. The instructions start at the beginning of the buffer
// and grow forward, the relocation information starts at the end of
// the buffer and grows backward.
//
// |<--------------- buffer_size ---------------->|
// |<-- instr_size -->| |<-- reloc_size -->|
// +==================+========+==================+
// | instructions | free | reloc info |
// +==================+========+==================+
// ^
// |
// buffer
struct CodeDesc {
byte* buffer;
int buffer_size;
int instr_size;
int reloc_size;
Assembler* origin;
};
// Callback function on object slots, used for iterating heap object slots in
// HeapObjects, global pointers to heap objects, etc. The callback allows the
// callback function to change the value of the slot.
typedef void (*ObjectSlotCallback)(HeapObject** pointer);
// Callback function used for iterating objects in heap spaces,
// for example, scanning heap objects.
typedef int (*HeapObjectCallback)(HeapObject* obj);
// Callback function used for checking constraints when copying/relocating
// objects. Returns true if an object can be copied/relocated from its
// old_addr to a new_addr.
typedef bool (*ConstraintCallback)(Address new_addr, Address old_addr);
// Callback function on inline caches, used for iterating over inline caches
// in compiled code.
typedef void (*InlineCacheCallback)(Code* code, Address ic);
// State for inline cache call sites. Aliased as IC::State.
enum InlineCacheState {
// Has never been executed.
UNINITIALIZED,
// Has been executed but monomorhic state has been delayed.
PREMONOMORPHIC,
// Has been executed and only one receiver type has been seen.
MONOMORPHIC,
// Like MONOMORPHIC but check failed due to prototype.
MONOMORPHIC_PROTOTYPE_FAILURE,
// Multiple receiver types have been seen.
MEGAMORPHIC,
// Special states for debug break or step in prepare stubs.
DEBUG_BREAK,
DEBUG_PREPARE_STEP_IN
};
enum InLoopFlag {
NOT_IN_LOOP,
IN_LOOP
};
enum CallFunctionFlags {
NO_CALL_FUNCTION_FLAGS = 0,
RECEIVER_MIGHT_BE_VALUE = 1 << 0 // Receiver might not be a JSObject.
};
enum InlineCacheHolderFlag {
OWN_MAP, // For fast properties objects.
PROTOTYPE_MAP // For slow properties objects (except GlobalObjects).
};
// Type of properties.
// Order of properties is significant.
// Must fit in the BitField PropertyDetails::TypeField.
// A copy of this is in mirror-debugger.js.
enum PropertyType {
NORMAL = 0, // only in slow mode
FIELD = 1, // only in fast mode
CONSTANT_FUNCTION = 2, // only in fast mode
CALLBACKS = 3,
INTERCEPTOR = 4, // only in lookup results, not in descriptors.
MAP_TRANSITION = 5, // only in fast mode
CONSTANT_TRANSITION = 6, // only in fast mode
NULL_DESCRIPTOR = 7, // only in fast mode
// All properties before MAP_TRANSITION are real.
FIRST_PHANTOM_PROPERTY_TYPE = MAP_TRANSITION,
// There are no IC stubs for NULL_DESCRIPTORS. Therefore,
// NULL_DESCRIPTOR can be used as the type flag for IC stubs for
// nonexistent properties.
NONEXISTENT = NULL_DESCRIPTOR
};
// Whether to remove map transitions and constant transitions from a
// DescriptorArray.
enum TransitionFlag {
REMOVE_TRANSITIONS,
KEEP_TRANSITIONS
};
// Union used for fast testing of specific double values.
union DoubleRepresentation {
double value;
int64_t bits;
DoubleRepresentation(double x) { value = x; }
};
// Union used for customized checking of the IEEE double types
// inlined within v8 runtime, rather than going to the underlying
// platform headers and libraries
union IeeeDoubleLittleEndianArchType {
double d;
struct {
unsigned int man_low :32;
unsigned int man_high :20;
unsigned int exp :11;
unsigned int sign :1;
} bits;
};
union IeeeDoubleBigEndianArchType {
double d;
struct {
unsigned int sign :1;
unsigned int exp :11;
unsigned int man_high :20;
unsigned int man_low :32;
} bits;
};
// AccessorCallback
struct AccessorDescriptor {
MaybeObject* (*getter)(Object* object, void* data);
MaybeObject* (*setter)(JSObject* object, Object* value, void* data);
void* data;
};
// Logging and profiling.
// A StateTag represents a possible state of the VM. When compiled with
// ENABLE_VMSTATE_TRACKING, the logger maintains a stack of these.
// Creating a VMState object enters a state by pushing on the stack, and
// destroying a VMState object leaves a state by popping the current state
// from the stack.
#define STATE_TAG_LIST(V) \
V(JS) \
V(GC) \
V(COMPILER) \
V(OTHER) \
V(EXTERNAL)
enum StateTag {
#define DEF_STATE_TAG(name) name,
STATE_TAG_LIST(DEF_STATE_TAG)
#undef DEF_STATE_TAG
// Pseudo-types.
state_tag_count
};
// -----------------------------------------------------------------------------
// Macros
// Testers for test.
#define HAS_SMI_TAG(value) \
((reinterpret_cast<intptr_t>(value) & kSmiTagMask) == kSmiTag)
#define HAS_FAILURE_TAG(value) \
((reinterpret_cast<intptr_t>(value) & kFailureTagMask) == kFailureTag)
// OBJECT_POINTER_ALIGN returns the value aligned as a HeapObject pointer
#define OBJECT_POINTER_ALIGN(value) \
(((value) + kObjectAlignmentMask) & ~kObjectAlignmentMask)
// POINTER_SIZE_ALIGN returns the value aligned as a pointer.
#define POINTER_SIZE_ALIGN(value) \
(((value) + kPointerAlignmentMask) & ~kPointerAlignmentMask)
// MAP_POINTER_ALIGN returns the value aligned as a map pointer.
#define MAP_POINTER_ALIGN(value) \
(((value) + kMapAlignmentMask) & ~kMapAlignmentMask)
// CODE_POINTER_ALIGN returns the value aligned as a generated code segment.
#define CODE_POINTER_ALIGN(value) \
(((value) + kCodeAlignmentMask) & ~kCodeAlignmentMask)
// Support for tracking C++ memory allocation. Insert TRACK_MEMORY("Fisk")
// inside a C++ class and new and delete will be overloaded so logging is
// performed.
// This file (globals.h) is included before log.h, so we use direct calls to
// the Logger rather than the LOG macro.
#ifdef DEBUG
#define TRACK_MEMORY(name) \
void* operator new(size_t size) { \
void* result = ::operator new(size); \
Logger::NewEvent(name, result, size); \
return result; \
} \
void operator delete(void* object) { \
Logger::DeleteEvent(name, object); \
::operator delete(object); \
}
#else
#define TRACK_MEMORY(name)
#endif
// Feature flags bit positions. They are mostly based on the CPUID spec.
// (We assign CPUID itself to one of the currently reserved bits --
// feel free to change this if needed.)
// On X86/X64, values below 32 are bits in EDX, values above 32 are bits in ECX.
enum CpuFeature { SSE4_1 = 32 + 19, // x86
SSE3 = 32 + 0, // x86
SSE2 = 26, // x86
CMOV = 15, // x86
RDTSC = 4, // x86
CPUID = 10, // x86
VFP3 = 1, // ARM
ARMv7 = 2, // ARM
SAHF = 0}; // x86
} } // namespace v8::internal
#endif // V8_V8GLOBALS_H_

13
src/virtual-frame.h
View File

@ -31,6 +31,9 @@
#include "frame-element.h"
#include "macro-assembler.h"
#include "list-inl.h"
#include "utils.h"
#if V8_TARGET_ARCH_IA32
#include "ia32/virtual-frame-ia32.h"
#elif V8_TARGET_ARCH_X64
@ -43,4 +46,14 @@
#error Unsupported target architecture.
#endif
namespace v8 {
namespace internal {
// Add() on List is inlined, ResizeAdd() called by Add() is inlined except for
// Lists of FrameElements, and ResizeAddInternal() is inlined in ResizeAdd().
template <>
void List<FrameElement,
FreeStoreAllocationPolicy>::ResizeAdd(const FrameElement& element);
} } // namespace v8::internal
#endif // V8_VIRTUAL_FRAME_H_