bf50532928
The usage of __attribute__((format(x, y)) was either wrong or missing from multiple functions, leading to erroneous formats. This CL: - Imports PRINTF_FORMAT macro from Chrome's src/base/compiler-specific.h. - Uses it appropriately. - Imports Chrome's base/format_macros.h mainly to fix size_t formats (further cleanup could be done). - Fixes a bunch of incorrect formats. Original CL: https://codereview.chromium.org/1869433004 Reverted in: https://codereview.chromium.org/1867383002 R= jochen@chromium.org TBR= bmeurer@chromium.org, yangguo@chromium.org, ahaas@chromium.org Review URL: https://codereview.chromium.org/1877453002 Cr-Commit-Position: refs/heads/master@{#35394}
1526 lines
42 KiB
C++
1526 lines
42 KiB
C++
// Copyright 2012 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef V8_UTILS_H_
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#define V8_UTILS_H_
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#include <limits.h>
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#include <stdlib.h>
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#include <string.h>
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#include <cmath>
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#include "include/v8.h"
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#include "src/allocation.h"
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#include "src/base/bits.h"
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#include "src/base/compiler-specific.h"
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#include "src/base/logging.h"
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#include "src/base/macros.h"
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#include "src/base/platform/platform.h"
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#include "src/globals.h"
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#include "src/list.h"
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#include "src/vector.h"
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namespace v8 {
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namespace internal {
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// ----------------------------------------------------------------------------
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// General helper functions
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// Returns the value (0 .. 15) of a hexadecimal character c.
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// If c is not a legal hexadecimal character, returns a value < 0.
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inline int HexValue(uc32 c) {
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c -= '0';
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if (static_cast<unsigned>(c) <= 9) return c;
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c = (c | 0x20) - ('a' - '0'); // detect 0x11..0x16 and 0x31..0x36.
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if (static_cast<unsigned>(c) <= 5) return c + 10;
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return -1;
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}
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inline int BoolToInt(bool b) { return b ? 1 : 0; }
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// Same as strcmp, but can handle NULL arguments.
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inline bool CStringEquals(const char* s1, const char* s2) {
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return (s1 == s2) || (s1 != NULL && s2 != NULL && strcmp(s1, s2) == 0);
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}
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// X must be a power of 2. Returns the number of trailing zeros.
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inline int WhichPowerOf2(uint32_t x) {
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DCHECK(base::bits::IsPowerOfTwo32(x));
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int bits = 0;
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#ifdef DEBUG
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uint32_t original_x = x;
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#endif
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if (x >= 0x10000) {
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bits += 16;
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x >>= 16;
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}
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if (x >= 0x100) {
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bits += 8;
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x >>= 8;
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}
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if (x >= 0x10) {
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bits += 4;
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x >>= 4;
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}
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switch (x) {
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default: UNREACHABLE();
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case 8: bits++; // Fall through.
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case 4: bits++; // Fall through.
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case 2: bits++; // Fall through.
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case 1: break;
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}
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DCHECK_EQ(static_cast<uint32_t>(1) << bits, original_x);
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return bits;
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}
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// X must be a power of 2. Returns the number of trailing zeros.
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inline int WhichPowerOf2_64(uint64_t x) {
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DCHECK(base::bits::IsPowerOfTwo64(x));
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int bits = 0;
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#ifdef DEBUG
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uint64_t original_x = x;
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#endif
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if (x >= 0x100000000L) {
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bits += 32;
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x >>= 32;
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}
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if (x >= 0x10000) {
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bits += 16;
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x >>= 16;
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}
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if (x >= 0x100) {
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bits += 8;
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x >>= 8;
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}
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if (x >= 0x10) {
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bits += 4;
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x >>= 4;
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}
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switch (x) {
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default: UNREACHABLE();
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case 8: bits++; // Fall through.
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case 4: bits++; // Fall through.
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case 2: bits++; // Fall through.
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case 1: break;
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}
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DCHECK_EQ(static_cast<uint64_t>(1) << bits, original_x);
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return bits;
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}
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inline int MostSignificantBit(uint32_t x) {
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static const int msb4[] = {0, 1, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4};
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int nibble = 0;
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if (x & 0xffff0000) {
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nibble += 16;
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x >>= 16;
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}
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if (x & 0xff00) {
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nibble += 8;
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x >>= 8;
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}
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if (x & 0xf0) {
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nibble += 4;
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x >>= 4;
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}
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return nibble + msb4[x];
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}
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// The C++ standard leaves the semantics of '>>' undefined for
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// negative signed operands. Most implementations do the right thing,
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// though.
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inline int ArithmeticShiftRight(int x, int s) {
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return x >> s;
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}
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template <typename T>
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int Compare(const T& a, const T& b) {
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if (a == b)
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return 0;
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else if (a < b)
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return -1;
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else
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return 1;
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}
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template <typename T>
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int PointerValueCompare(const T* a, const T* b) {
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return Compare<T>(*a, *b);
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}
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// Compare function to compare the object pointer value of two
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// handlified objects. The handles are passed as pointers to the
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// handles.
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template<typename T> class Handle; // Forward declaration.
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template <typename T>
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int HandleObjectPointerCompare(const Handle<T>* a, const Handle<T>* b) {
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return Compare<T*>(*(*a), *(*b));
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}
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template <typename T, typename U>
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inline bool IsAligned(T value, U alignment) {
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return (value & (alignment - 1)) == 0;
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}
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// Returns true if (addr + offset) is aligned.
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inline bool IsAddressAligned(Address addr,
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intptr_t alignment,
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int offset = 0) {
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intptr_t offs = OffsetFrom(addr + offset);
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return IsAligned(offs, alignment);
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}
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// Returns the maximum of the two parameters.
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template <typename T>
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T Max(T a, T b) {
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return a < b ? b : a;
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}
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// Returns the minimum of the two parameters.
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template <typename T>
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T Min(T a, T b) {
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return a < b ? a : b;
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}
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// Returns the absolute value of its argument.
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template <typename T>
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T Abs(T a) {
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return a < 0 ? -a : a;
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}
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// Floor(-0.0) == 0.0
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inline double Floor(double x) {
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#if V8_CC_MSVC
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if (x == 0) return x; // Fix for issue 3477.
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#endif
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return std::floor(x);
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}
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// TODO(svenpanne) Clean up the whole power-of-2 mess.
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inline int32_t WhichPowerOf2Abs(int32_t x) {
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return (x == kMinInt) ? 31 : WhichPowerOf2(Abs(x));
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}
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// Obtains the unsigned type corresponding to T
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// available in C++11 as std::make_unsigned
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template<typename T>
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struct make_unsigned {
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typedef T type;
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};
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// Template specializations necessary to have make_unsigned work
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template<> struct make_unsigned<int32_t> {
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typedef uint32_t type;
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};
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template<> struct make_unsigned<int64_t> {
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typedef uint64_t type;
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};
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// ----------------------------------------------------------------------------
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// BitField is a help template for encoding and decode bitfield with
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// unsigned content.
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template<class T, int shift, int size, class U>
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class BitFieldBase {
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public:
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// A type U mask of bit field. To use all bits of a type U of x bits
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// in a bitfield without compiler warnings we have to compute 2^x
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// without using a shift count of x in the computation.
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static const U kOne = static_cast<U>(1U);
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static const U kMask = ((kOne << shift) << size) - (kOne << shift);
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static const U kShift = shift;
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static const U kSize = size;
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static const U kNext = kShift + kSize;
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// Value for the field with all bits set.
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static const T kMax = static_cast<T>((kOne << size) - 1);
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// Tells whether the provided value fits into the bit field.
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static bool is_valid(T value) {
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return (static_cast<U>(value) & ~static_cast<U>(kMax)) == 0;
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}
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// Returns a type U with the bit field value encoded.
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static U encode(T value) {
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DCHECK(is_valid(value));
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return static_cast<U>(value) << shift;
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}
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// Returns a type U with the bit field value updated.
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static U update(U previous, T value) {
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return (previous & ~kMask) | encode(value);
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}
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// Extracts the bit field from the value.
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static T decode(U value) {
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return static_cast<T>((value & kMask) >> shift);
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}
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};
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template <class T, int shift, int size>
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class BitField8 : public BitFieldBase<T, shift, size, uint8_t> {};
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template <class T, int shift, int size>
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class BitField16 : public BitFieldBase<T, shift, size, uint16_t> {};
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template<class T, int shift, int size>
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class BitField : public BitFieldBase<T, shift, size, uint32_t> { };
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template<class T, int shift, int size>
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class BitField64 : public BitFieldBase<T, shift, size, uint64_t> { };
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// ----------------------------------------------------------------------------
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// BitSetComputer is a help template for encoding and decoding information for
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// a variable number of items in an array.
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//
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// To encode boolean data in a smi array you would use:
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// typedef BitSetComputer<bool, 1, kSmiValueSize, uint32_t> BoolComputer;
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//
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template <class T, int kBitsPerItem, int kBitsPerWord, class U>
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class BitSetComputer {
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public:
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static const int kItemsPerWord = kBitsPerWord / kBitsPerItem;
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static const int kMask = (1 << kBitsPerItem) - 1;
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// The number of array elements required to embed T information for each item.
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static int word_count(int items) {
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if (items == 0) return 0;
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return (items - 1) / kItemsPerWord + 1;
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}
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// The array index to look at for item.
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static int index(int base_index, int item) {
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return base_index + item / kItemsPerWord;
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}
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// Extract T data for a given item from data.
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static T decode(U data, int item) {
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return static_cast<T>((data >> shift(item)) & kMask);
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}
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// Return the encoding for a store of value for item in previous.
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static U encode(U previous, int item, T value) {
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int shift_value = shift(item);
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int set_bits = (static_cast<int>(value) << shift_value);
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return (previous & ~(kMask << shift_value)) | set_bits;
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}
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static int shift(int item) { return (item % kItemsPerWord) * kBitsPerItem; }
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};
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// ----------------------------------------------------------------------------
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// Hash function.
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static const uint32_t kZeroHashSeed = 0;
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// Thomas Wang, Integer Hash Functions.
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// http://www.concentric.net/~Ttwang/tech/inthash.htm
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inline uint32_t ComputeIntegerHash(uint32_t key, uint32_t seed) {
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uint32_t hash = key;
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hash = hash ^ seed;
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hash = ~hash + (hash << 15); // hash = (hash << 15) - hash - 1;
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hash = hash ^ (hash >> 12);
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hash = hash + (hash << 2);
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hash = hash ^ (hash >> 4);
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hash = hash * 2057; // hash = (hash + (hash << 3)) + (hash << 11);
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hash = hash ^ (hash >> 16);
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return hash & 0x3fffffff;
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}
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inline uint32_t ComputeLongHash(uint64_t key) {
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uint64_t hash = key;
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hash = ~hash + (hash << 18); // hash = (hash << 18) - hash - 1;
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hash = hash ^ (hash >> 31);
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hash = hash * 21; // hash = (hash + (hash << 2)) + (hash << 4);
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hash = hash ^ (hash >> 11);
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hash = hash + (hash << 6);
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hash = hash ^ (hash >> 22);
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return static_cast<uint32_t>(hash);
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}
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inline uint32_t ComputePointerHash(void* ptr) {
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return ComputeIntegerHash(
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static_cast<uint32_t>(reinterpret_cast<intptr_t>(ptr)),
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v8::internal::kZeroHashSeed);
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}
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// ----------------------------------------------------------------------------
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// Generated memcpy/memmove
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// Initializes the codegen support that depends on CPU features.
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void init_memcopy_functions(Isolate* isolate);
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#if defined(V8_TARGET_ARCH_IA32) || defined(V8_TARGET_ARCH_X87)
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// Limit below which the extra overhead of the MemCopy function is likely
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// to outweigh the benefits of faster copying.
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const int kMinComplexMemCopy = 64;
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// Copy memory area. No restrictions.
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void MemMove(void* dest, const void* src, size_t size);
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typedef void (*MemMoveFunction)(void* dest, const void* src, size_t size);
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// Keep the distinction of "move" vs. "copy" for the benefit of other
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// architectures.
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V8_INLINE void MemCopy(void* dest, const void* src, size_t size) {
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MemMove(dest, src, size);
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}
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#elif defined(V8_HOST_ARCH_ARM)
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typedef void (*MemCopyUint8Function)(uint8_t* dest, const uint8_t* src,
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size_t size);
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extern MemCopyUint8Function memcopy_uint8_function;
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V8_INLINE void MemCopyUint8Wrapper(uint8_t* dest, const uint8_t* src,
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size_t chars) {
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memcpy(dest, src, chars);
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}
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// For values < 16, the assembler function is slower than the inlined C code.
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const int kMinComplexMemCopy = 16;
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V8_INLINE void MemCopy(void* dest, const void* src, size_t size) {
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(*memcopy_uint8_function)(reinterpret_cast<uint8_t*>(dest),
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reinterpret_cast<const uint8_t*>(src), size);
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}
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V8_INLINE void MemMove(void* dest, const void* src, size_t size) {
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memmove(dest, src, size);
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}
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typedef void (*MemCopyUint16Uint8Function)(uint16_t* dest, const uint8_t* src,
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size_t size);
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extern MemCopyUint16Uint8Function memcopy_uint16_uint8_function;
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void MemCopyUint16Uint8Wrapper(uint16_t* dest, const uint8_t* src,
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size_t chars);
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// For values < 12, the assembler function is slower than the inlined C code.
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const int kMinComplexConvertMemCopy = 12;
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V8_INLINE void MemCopyUint16Uint8(uint16_t* dest, const uint8_t* src,
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size_t size) {
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(*memcopy_uint16_uint8_function)(dest, src, size);
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}
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#elif defined(V8_HOST_ARCH_MIPS)
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typedef void (*MemCopyUint8Function)(uint8_t* dest, const uint8_t* src,
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size_t size);
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extern MemCopyUint8Function memcopy_uint8_function;
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V8_INLINE void MemCopyUint8Wrapper(uint8_t* dest, const uint8_t* src,
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size_t chars) {
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memcpy(dest, src, chars);
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}
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// For values < 16, the assembler function is slower than the inlined C code.
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const int kMinComplexMemCopy = 16;
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V8_INLINE void MemCopy(void* dest, const void* src, size_t size) {
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(*memcopy_uint8_function)(reinterpret_cast<uint8_t*>(dest),
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reinterpret_cast<const uint8_t*>(src), size);
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}
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V8_INLINE void MemMove(void* dest, const void* src, size_t size) {
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memmove(dest, src, size);
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}
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#else
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// Copy memory area to disjoint memory area.
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V8_INLINE void MemCopy(void* dest, const void* src, size_t size) {
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memcpy(dest, src, size);
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}
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V8_INLINE void MemMove(void* dest, const void* src, size_t size) {
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memmove(dest, src, size);
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}
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const int kMinComplexMemCopy = 16 * kPointerSize;
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#endif // V8_TARGET_ARCH_IA32
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// ----------------------------------------------------------------------------
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// Miscellaneous
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// A static resource holds a static instance that can be reserved in
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// a local scope using an instance of Access. Attempts to re-reserve
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// the instance will cause an error.
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template <typename T>
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class StaticResource {
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public:
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StaticResource() : is_reserved_(false) {}
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private:
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template <typename S> friend class Access;
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T instance_;
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bool is_reserved_;
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};
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// Locally scoped access to a static resource.
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template <typename T>
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class Access {
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public:
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explicit Access(StaticResource<T>* resource)
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: resource_(resource)
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, instance_(&resource->instance_) {
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DCHECK(!resource->is_reserved_);
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resource->is_reserved_ = true;
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}
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~Access() {
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resource_->is_reserved_ = false;
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resource_ = NULL;
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instance_ = NULL;
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}
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T* value() { return instance_; }
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T* operator -> () { return instance_; }
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private:
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StaticResource<T>* resource_;
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T* instance_;
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};
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// A pointer that can only be set once and doesn't allow NULL values.
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template<typename T>
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class SetOncePointer {
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public:
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SetOncePointer() : pointer_(NULL) { }
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bool is_set() const { return pointer_ != NULL; }
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T* get() const {
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DCHECK(pointer_ != NULL);
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return pointer_;
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}
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void set(T* value) {
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DCHECK(pointer_ == NULL && value != NULL);
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pointer_ = value;
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}
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private:
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T* pointer_;
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};
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template <typename T, int kSize>
|
|
class EmbeddedVector : public Vector<T> {
|
|
public:
|
|
EmbeddedVector() : Vector<T>(buffer_, kSize) { }
|
|
|
|
explicit EmbeddedVector(T initial_value) : Vector<T>(buffer_, kSize) {
|
|
for (int i = 0; i < kSize; ++i) {
|
|
buffer_[i] = initial_value;
|
|
}
|
|
}
|
|
|
|
// When copying, make underlying Vector to reference our buffer.
|
|
EmbeddedVector(const EmbeddedVector& rhs)
|
|
: Vector<T>(rhs) {
|
|
MemCopy(buffer_, rhs.buffer_, sizeof(T) * kSize);
|
|
this->set_start(buffer_);
|
|
}
|
|
|
|
EmbeddedVector& operator=(const EmbeddedVector& rhs) {
|
|
if (this == &rhs) return *this;
|
|
Vector<T>::operator=(rhs);
|
|
MemCopy(buffer_, rhs.buffer_, sizeof(T) * kSize);
|
|
this->set_start(buffer_);
|
|
return *this;
|
|
}
|
|
|
|
private:
|
|
T buffer_[kSize];
|
|
};
|
|
|
|
// Compare 8bit/16bit chars to 8bit/16bit chars.
|
|
template <typename lchar, typename rchar>
|
|
inline int CompareCharsUnsigned(const lchar* lhs, const rchar* rhs,
|
|
size_t chars) {
|
|
const lchar* limit = lhs + chars;
|
|
if (sizeof(*lhs) == sizeof(char) && sizeof(*rhs) == sizeof(char)) {
|
|
// memcmp compares byte-by-byte, yielding wrong results for two-byte
|
|
// strings on little-endian systems.
|
|
return memcmp(lhs, rhs, chars);
|
|
}
|
|
while (lhs < limit) {
|
|
int r = static_cast<int>(*lhs) - static_cast<int>(*rhs);
|
|
if (r != 0) return r;
|
|
++lhs;
|
|
++rhs;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
template <typename lchar, typename rchar>
|
|
inline int CompareChars(const lchar* lhs, const rchar* rhs, size_t chars) {
|
|
DCHECK(sizeof(lchar) <= 2);
|
|
DCHECK(sizeof(rchar) <= 2);
|
|
if (sizeof(lchar) == 1) {
|
|
if (sizeof(rchar) == 1) {
|
|
return CompareCharsUnsigned(reinterpret_cast<const uint8_t*>(lhs),
|
|
reinterpret_cast<const uint8_t*>(rhs),
|
|
chars);
|
|
} else {
|
|
return CompareCharsUnsigned(reinterpret_cast<const uint8_t*>(lhs),
|
|
reinterpret_cast<const uint16_t*>(rhs),
|
|
chars);
|
|
}
|
|
} else {
|
|
if (sizeof(rchar) == 1) {
|
|
return CompareCharsUnsigned(reinterpret_cast<const uint16_t*>(lhs),
|
|
reinterpret_cast<const uint8_t*>(rhs),
|
|
chars);
|
|
} else {
|
|
return CompareCharsUnsigned(reinterpret_cast<const uint16_t*>(lhs),
|
|
reinterpret_cast<const uint16_t*>(rhs),
|
|
chars);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
// Calculate 10^exponent.
|
|
inline int TenToThe(int exponent) {
|
|
DCHECK(exponent <= 9);
|
|
DCHECK(exponent >= 1);
|
|
int answer = 10;
|
|
for (int i = 1; i < exponent; i++) answer *= 10;
|
|
return answer;
|
|
}
|
|
|
|
|
|
template<typename ElementType, int NumElements>
|
|
class EmbeddedContainer {
|
|
public:
|
|
EmbeddedContainer() : elems_() { }
|
|
|
|
int length() const { return NumElements; }
|
|
const ElementType& operator[](int i) const {
|
|
DCHECK(i < length());
|
|
return elems_[i];
|
|
}
|
|
ElementType& operator[](int i) {
|
|
DCHECK(i < length());
|
|
return elems_[i];
|
|
}
|
|
|
|
private:
|
|
ElementType elems_[NumElements];
|
|
};
|
|
|
|
|
|
template<typename ElementType>
|
|
class EmbeddedContainer<ElementType, 0> {
|
|
public:
|
|
int length() const { return 0; }
|
|
const ElementType& operator[](int i) const {
|
|
UNREACHABLE();
|
|
static ElementType t = 0;
|
|
return t;
|
|
}
|
|
ElementType& operator[](int i) {
|
|
UNREACHABLE();
|
|
static ElementType t = 0;
|
|
return t;
|
|
}
|
|
};
|
|
|
|
|
|
// Helper class for building result strings in a character buffer. The
|
|
// purpose of the class is to use safe operations that checks the
|
|
// buffer bounds on all operations in debug mode.
|
|
// This simple base class does not allow formatted output.
|
|
class SimpleStringBuilder {
|
|
public:
|
|
// Create a string builder with a buffer of the given size. The
|
|
// buffer is allocated through NewArray<char> and must be
|
|
// deallocated by the caller of Finalize().
|
|
explicit SimpleStringBuilder(int size);
|
|
|
|
SimpleStringBuilder(char* buffer, int size)
|
|
: buffer_(buffer, size), position_(0) { }
|
|
|
|
~SimpleStringBuilder() { if (!is_finalized()) Finalize(); }
|
|
|
|
int size() const { return buffer_.length(); }
|
|
|
|
// Get the current position in the builder.
|
|
int position() const {
|
|
DCHECK(!is_finalized());
|
|
return position_;
|
|
}
|
|
|
|
// Reset the position.
|
|
void Reset() { position_ = 0; }
|
|
|
|
// Add a single character to the builder. It is not allowed to add
|
|
// 0-characters; use the Finalize() method to terminate the string
|
|
// instead.
|
|
void AddCharacter(char c) {
|
|
DCHECK(c != '\0');
|
|
DCHECK(!is_finalized() && position_ < buffer_.length());
|
|
buffer_[position_++] = c;
|
|
}
|
|
|
|
// Add an entire string to the builder. Uses strlen() internally to
|
|
// compute the length of the input string.
|
|
void AddString(const char* s);
|
|
|
|
// Add the first 'n' characters of the given 0-terminated string 's' to the
|
|
// builder. The input string must have enough characters.
|
|
void AddSubstring(const char* s, int n);
|
|
|
|
// Add character padding to the builder. If count is non-positive,
|
|
// nothing is added to the builder.
|
|
void AddPadding(char c, int count);
|
|
|
|
// Add the decimal representation of the value.
|
|
void AddDecimalInteger(int value);
|
|
|
|
// Finalize the string by 0-terminating it and returning the buffer.
|
|
char* Finalize();
|
|
|
|
protected:
|
|
Vector<char> buffer_;
|
|
int position_;
|
|
|
|
bool is_finalized() const { return position_ < 0; }
|
|
|
|
private:
|
|
DISALLOW_IMPLICIT_CONSTRUCTORS(SimpleStringBuilder);
|
|
};
|
|
|
|
|
|
// A poor man's version of STL's bitset: A bit set of enums E (without explicit
|
|
// values), fitting into an integral type T.
|
|
template <class E, class T = int>
|
|
class EnumSet {
|
|
public:
|
|
explicit EnumSet(T bits = 0) : bits_(bits) {}
|
|
bool IsEmpty() const { return bits_ == 0; }
|
|
bool Contains(E element) const { return (bits_ & Mask(element)) != 0; }
|
|
bool ContainsAnyOf(const EnumSet& set) const {
|
|
return (bits_ & set.bits_) != 0;
|
|
}
|
|
void Add(E element) { bits_ |= Mask(element); }
|
|
void Add(const EnumSet& set) { bits_ |= set.bits_; }
|
|
void Remove(E element) { bits_ &= ~Mask(element); }
|
|
void Remove(const EnumSet& set) { bits_ &= ~set.bits_; }
|
|
void RemoveAll() { bits_ = 0; }
|
|
void Intersect(const EnumSet& set) { bits_ &= set.bits_; }
|
|
T ToIntegral() const { return bits_; }
|
|
bool operator==(const EnumSet& set) { return bits_ == set.bits_; }
|
|
bool operator!=(const EnumSet& set) { return bits_ != set.bits_; }
|
|
EnumSet<E, T> operator|(const EnumSet& set) const {
|
|
return EnumSet<E, T>(bits_ | set.bits_);
|
|
}
|
|
|
|
private:
|
|
T Mask(E element) const {
|
|
// The strange typing in DCHECK is necessary to avoid stupid warnings, see:
|
|
// http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43680
|
|
DCHECK(static_cast<int>(element) < static_cast<int>(sizeof(T) * CHAR_BIT));
|
|
return static_cast<T>(1) << element;
|
|
}
|
|
|
|
T bits_;
|
|
};
|
|
|
|
// Bit field extraction.
|
|
inline uint32_t unsigned_bitextract_32(int msb, int lsb, uint32_t x) {
|
|
return (x >> lsb) & ((1 << (1 + msb - lsb)) - 1);
|
|
}
|
|
|
|
inline uint64_t unsigned_bitextract_64(int msb, int lsb, uint64_t x) {
|
|
return (x >> lsb) & ((static_cast<uint64_t>(1) << (1 + msb - lsb)) - 1);
|
|
}
|
|
|
|
inline int32_t signed_bitextract_32(int msb, int lsb, int32_t x) {
|
|
return (x << (31 - msb)) >> (lsb + 31 - msb);
|
|
}
|
|
|
|
inline int signed_bitextract_64(int msb, int lsb, int x) {
|
|
// TODO(jbramley): This is broken for big bitfields.
|
|
return (x << (63 - msb)) >> (lsb + 63 - msb);
|
|
}
|
|
|
|
// Check number width.
|
|
inline bool is_intn(int64_t x, unsigned n) {
|
|
DCHECK((0 < n) && (n < 64));
|
|
int64_t limit = static_cast<int64_t>(1) << (n - 1);
|
|
return (-limit <= x) && (x < limit);
|
|
}
|
|
|
|
inline bool is_uintn(int64_t x, unsigned n) {
|
|
DCHECK((0 < n) && (n < (sizeof(x) * kBitsPerByte)));
|
|
return !(x >> n);
|
|
}
|
|
|
|
template <class T>
|
|
inline T truncate_to_intn(T x, unsigned n) {
|
|
DCHECK((0 < n) && (n < (sizeof(x) * kBitsPerByte)));
|
|
return (x & ((static_cast<T>(1) << n) - 1));
|
|
}
|
|
|
|
#define INT_1_TO_63_LIST(V) \
|
|
V(1) V(2) V(3) V(4) V(5) V(6) V(7) V(8) \
|
|
V(9) V(10) V(11) V(12) V(13) V(14) V(15) V(16) \
|
|
V(17) V(18) V(19) V(20) V(21) V(22) V(23) V(24) \
|
|
V(25) V(26) V(27) V(28) V(29) V(30) V(31) V(32) \
|
|
V(33) V(34) V(35) V(36) V(37) V(38) V(39) V(40) \
|
|
V(41) V(42) V(43) V(44) V(45) V(46) V(47) V(48) \
|
|
V(49) V(50) V(51) V(52) V(53) V(54) V(55) V(56) \
|
|
V(57) V(58) V(59) V(60) V(61) V(62) V(63)
|
|
|
|
#define DECLARE_IS_INT_N(N) \
|
|
inline bool is_int##N(int64_t x) { return is_intn(x, N); }
|
|
#define DECLARE_IS_UINT_N(N) \
|
|
template <class T> \
|
|
inline bool is_uint##N(T x) { return is_uintn(x, N); }
|
|
#define DECLARE_TRUNCATE_TO_INT_N(N) \
|
|
template <class T> \
|
|
inline T truncate_to_int##N(T x) { return truncate_to_intn(x, N); }
|
|
INT_1_TO_63_LIST(DECLARE_IS_INT_N)
|
|
INT_1_TO_63_LIST(DECLARE_IS_UINT_N)
|
|
INT_1_TO_63_LIST(DECLARE_TRUNCATE_TO_INT_N)
|
|
#undef DECLARE_IS_INT_N
|
|
#undef DECLARE_IS_UINT_N
|
|
#undef DECLARE_TRUNCATE_TO_INT_N
|
|
|
|
class TypeFeedbackId {
|
|
public:
|
|
explicit TypeFeedbackId(int id) : id_(id) { }
|
|
int ToInt() const { return id_; }
|
|
|
|
static TypeFeedbackId None() { return TypeFeedbackId(kNoneId); }
|
|
bool IsNone() const { return id_ == kNoneId; }
|
|
|
|
private:
|
|
static const int kNoneId = -1;
|
|
|
|
int id_;
|
|
};
|
|
|
|
inline bool operator<(TypeFeedbackId lhs, TypeFeedbackId rhs) {
|
|
return lhs.ToInt() < rhs.ToInt();
|
|
}
|
|
inline bool operator>(TypeFeedbackId lhs, TypeFeedbackId rhs) {
|
|
return lhs.ToInt() > rhs.ToInt();
|
|
}
|
|
|
|
|
|
class FeedbackVectorSlot {
|
|
public:
|
|
FeedbackVectorSlot() : id_(kInvalidSlot) {}
|
|
explicit FeedbackVectorSlot(int id) : id_(id) {}
|
|
|
|
int ToInt() const { return id_; }
|
|
|
|
static FeedbackVectorSlot Invalid() { return FeedbackVectorSlot(); }
|
|
bool IsInvalid() const { return id_ == kInvalidSlot; }
|
|
|
|
bool operator==(FeedbackVectorSlot that) const {
|
|
return this->id_ == that.id_;
|
|
}
|
|
bool operator!=(FeedbackVectorSlot that) const { return !(*this == that); }
|
|
|
|
friend size_t hash_value(FeedbackVectorSlot slot) { return slot.ToInt(); }
|
|
friend std::ostream& operator<<(std::ostream& os, FeedbackVectorSlot);
|
|
|
|
private:
|
|
static const int kInvalidSlot = -1;
|
|
|
|
int id_;
|
|
};
|
|
|
|
|
|
class BailoutId {
|
|
public:
|
|
explicit BailoutId(int id) : id_(id) { }
|
|
int ToInt() const { return id_; }
|
|
|
|
static BailoutId None() { return BailoutId(kNoneId); }
|
|
static BailoutId ScriptContext() { return BailoutId(kScriptContextId); }
|
|
static BailoutId FunctionContext() { return BailoutId(kFunctionContextId); }
|
|
static BailoutId FunctionEntry() { return BailoutId(kFunctionEntryId); }
|
|
static BailoutId Declarations() { return BailoutId(kDeclarationsId); }
|
|
static BailoutId FirstUsable() { return BailoutId(kFirstUsableId); }
|
|
static BailoutId StubEntry() { return BailoutId(kStubEntryId); }
|
|
|
|
bool IsNone() const { return id_ == kNoneId; }
|
|
bool operator==(const BailoutId& other) const { return id_ == other.id_; }
|
|
bool operator!=(const BailoutId& other) const { return id_ != other.id_; }
|
|
friend size_t hash_value(BailoutId);
|
|
friend std::ostream& operator<<(std::ostream&, BailoutId);
|
|
|
|
private:
|
|
static const int kNoneId = -1;
|
|
|
|
// Using 0 could disguise errors.
|
|
static const int kScriptContextId = 1;
|
|
static const int kFunctionContextId = 2;
|
|
static const int kFunctionEntryId = 3;
|
|
|
|
// This AST id identifies the point after the declarations have been visited.
|
|
// We need it to capture the environment effects of declarations that emit
|
|
// code (function declarations).
|
|
static const int kDeclarationsId = 4;
|
|
|
|
// Every FunctionState starts with this id.
|
|
static const int kFirstUsableId = 5;
|
|
|
|
// Every compiled stub starts with this id.
|
|
static const int kStubEntryId = 6;
|
|
|
|
int id_;
|
|
};
|
|
|
|
class TokenDispenserForFinally {
|
|
public:
|
|
int GetBreakContinueToken() { return next_token_++; }
|
|
static const int kFallThroughToken = 0;
|
|
static const int kThrowToken = 1;
|
|
static const int kReturnToken = 2;
|
|
|
|
static const int kFirstBreakContinueToken = 3;
|
|
static const int kInvalidToken = -1;
|
|
|
|
private:
|
|
int next_token_ = kFirstBreakContinueToken;
|
|
};
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// I/O support.
|
|
|
|
// Our version of printf().
|
|
void PRINTF_FORMAT(1, 2) PrintF(const char* format, ...);
|
|
void PRINTF_FORMAT(2, 3) PrintF(FILE* out, const char* format, ...);
|
|
|
|
// Prepends the current process ID to the output.
|
|
void PRINTF_FORMAT(1, 2) PrintPID(const char* format, ...);
|
|
|
|
// Prepends the current process ID and given isolate pointer to the output.
|
|
void PRINTF_FORMAT(2, 3) PrintIsolate(void* isolate, const char* format, ...);
|
|
|
|
// Safe formatting print. Ensures that str is always null-terminated.
|
|
// Returns the number of chars written, or -1 if output was truncated.
|
|
int PRINTF_FORMAT(2, 3) SNPrintF(Vector<char> str, const char* format, ...);
|
|
int PRINTF_FORMAT(2, 0)
|
|
VSNPrintF(Vector<char> str, const char* format, va_list args);
|
|
|
|
void StrNCpy(Vector<char> dest, const char* src, size_t n);
|
|
|
|
// Our version of fflush.
|
|
void Flush(FILE* out);
|
|
|
|
inline void Flush() {
|
|
Flush(stdout);
|
|
}
|
|
|
|
|
|
// Read a line of characters after printing the prompt to stdout. The resulting
|
|
// char* needs to be disposed off with DeleteArray by the caller.
|
|
char* ReadLine(const char* prompt);
|
|
|
|
|
|
// Read and return the raw bytes in a file. the size of the buffer is returned
|
|
// in size.
|
|
// The returned buffer must be freed by the caller.
|
|
byte* ReadBytes(const char* filename, int* size, bool verbose = true);
|
|
|
|
|
|
// Append size chars from str to the file given by filename.
|
|
// The file is overwritten. Returns the number of chars written.
|
|
int AppendChars(const char* filename,
|
|
const char* str,
|
|
int size,
|
|
bool verbose = true);
|
|
|
|
|
|
// Write size chars from str to the file given by filename.
|
|
// The file is overwritten. Returns the number of chars written.
|
|
int WriteChars(const char* filename,
|
|
const char* str,
|
|
int size,
|
|
bool verbose = true);
|
|
|
|
|
|
// Write size bytes to the file given by filename.
|
|
// The file is overwritten. Returns the number of bytes written.
|
|
int WriteBytes(const char* filename,
|
|
const byte* bytes,
|
|
int size,
|
|
bool verbose = true);
|
|
|
|
|
|
// Write the C code
|
|
// const char* <varname> = "<str>";
|
|
// const int <varname>_len = <len>;
|
|
// to the file given by filename. Only the first len chars are written.
|
|
int WriteAsCFile(const char* filename, const char* varname,
|
|
const char* str, int size, bool verbose = true);
|
|
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// Memory
|
|
|
|
// Copies words from |src| to |dst|. The data spans must not overlap.
|
|
template <typename T>
|
|
inline void CopyWords(T* dst, const T* src, size_t num_words) {
|
|
STATIC_ASSERT(sizeof(T) == kPointerSize);
|
|
// TODO(mvstanton): disabled because mac builds are bogus failing on this
|
|
// assert. They are doing a signed comparison. Investigate in
|
|
// the morning.
|
|
// DCHECK(Min(dst, const_cast<T*>(src)) + num_words <=
|
|
// Max(dst, const_cast<T*>(src)));
|
|
DCHECK(num_words > 0);
|
|
|
|
// Use block copying MemCopy if the segment we're copying is
|
|
// enough to justify the extra call/setup overhead.
|
|
static const size_t kBlockCopyLimit = 16;
|
|
|
|
if (num_words < kBlockCopyLimit) {
|
|
do {
|
|
num_words--;
|
|
*dst++ = *src++;
|
|
} while (num_words > 0);
|
|
} else {
|
|
MemCopy(dst, src, num_words * kPointerSize);
|
|
}
|
|
}
|
|
|
|
|
|
// Copies words from |src| to |dst|. No restrictions.
|
|
template <typename T>
|
|
inline void MoveWords(T* dst, const T* src, size_t num_words) {
|
|
STATIC_ASSERT(sizeof(T) == kPointerSize);
|
|
DCHECK(num_words > 0);
|
|
|
|
// Use block copying MemCopy if the segment we're copying is
|
|
// enough to justify the extra call/setup overhead.
|
|
static const size_t kBlockCopyLimit = 16;
|
|
|
|
if (num_words < kBlockCopyLimit &&
|
|
((dst < src) || (dst >= (src + num_words * kPointerSize)))) {
|
|
T* end = dst + num_words;
|
|
do {
|
|
num_words--;
|
|
*dst++ = *src++;
|
|
} while (num_words > 0);
|
|
} else {
|
|
MemMove(dst, src, num_words * kPointerSize);
|
|
}
|
|
}
|
|
|
|
|
|
// Copies data from |src| to |dst|. The data spans must not overlap.
|
|
template <typename T>
|
|
inline void CopyBytes(T* dst, const T* src, size_t num_bytes) {
|
|
STATIC_ASSERT(sizeof(T) == 1);
|
|
DCHECK(Min(dst, const_cast<T*>(src)) + num_bytes <=
|
|
Max(dst, const_cast<T*>(src)));
|
|
if (num_bytes == 0) return;
|
|
|
|
// Use block copying MemCopy if the segment we're copying is
|
|
// enough to justify the extra call/setup overhead.
|
|
static const int kBlockCopyLimit = kMinComplexMemCopy;
|
|
|
|
if (num_bytes < static_cast<size_t>(kBlockCopyLimit)) {
|
|
do {
|
|
num_bytes--;
|
|
*dst++ = *src++;
|
|
} while (num_bytes > 0);
|
|
} else {
|
|
MemCopy(dst, src, num_bytes);
|
|
}
|
|
}
|
|
|
|
|
|
template <typename T, typename U>
|
|
inline void MemsetPointer(T** dest, U* value, int counter) {
|
|
#ifdef DEBUG
|
|
T* a = NULL;
|
|
U* b = NULL;
|
|
a = b; // Fake assignment to check assignability.
|
|
USE(a);
|
|
#endif // DEBUG
|
|
#if V8_HOST_ARCH_IA32
|
|
#define STOS "stosl"
|
|
#elif V8_HOST_ARCH_X64
|
|
#if V8_HOST_ARCH_32_BIT
|
|
#define STOS "addr32 stosl"
|
|
#else
|
|
#define STOS "stosq"
|
|
#endif
|
|
#endif
|
|
#if defined(__native_client__)
|
|
// This STOS sequence does not validate for x86_64 Native Client.
|
|
// Here we #undef STOS to force use of the slower C version.
|
|
// TODO(bradchen): Profile V8 and implement a faster REP STOS
|
|
// here if the profile indicates it matters.
|
|
#undef STOS
|
|
#endif
|
|
|
|
#if defined(MEMORY_SANITIZER)
|
|
// MemorySanitizer does not understand inline assembly.
|
|
#undef STOS
|
|
#endif
|
|
|
|
#if defined(__GNUC__) && defined(STOS)
|
|
asm volatile(
|
|
"cld;"
|
|
"rep ; " STOS
|
|
: "+&c" (counter), "+&D" (dest)
|
|
: "a" (value)
|
|
: "memory", "cc");
|
|
#else
|
|
for (int i = 0; i < counter; i++) {
|
|
dest[i] = value;
|
|
}
|
|
#endif
|
|
|
|
#undef STOS
|
|
}
|
|
|
|
|
|
// Simple support to read a file into a 0-terminated C-string.
|
|
// The returned buffer must be freed by the caller.
|
|
// On return, *exits tells whether the file existed.
|
|
Vector<const char> ReadFile(const char* filename,
|
|
bool* exists,
|
|
bool verbose = true);
|
|
Vector<const char> ReadFile(FILE* file,
|
|
bool* exists,
|
|
bool verbose = true);
|
|
|
|
|
|
template <typename sourcechar, typename sinkchar>
|
|
INLINE(static void CopyCharsUnsigned(sinkchar* dest, const sourcechar* src,
|
|
size_t chars));
|
|
#if defined(V8_HOST_ARCH_ARM)
|
|
INLINE(void CopyCharsUnsigned(uint8_t* dest, const uint8_t* src, size_t chars));
|
|
INLINE(void CopyCharsUnsigned(uint16_t* dest, const uint8_t* src,
|
|
size_t chars));
|
|
INLINE(void CopyCharsUnsigned(uint16_t* dest, const uint16_t* src,
|
|
size_t chars));
|
|
#elif defined(V8_HOST_ARCH_MIPS)
|
|
INLINE(void CopyCharsUnsigned(uint8_t* dest, const uint8_t* src, size_t chars));
|
|
INLINE(void CopyCharsUnsigned(uint16_t* dest, const uint16_t* src,
|
|
size_t chars));
|
|
#elif defined(V8_HOST_ARCH_PPC) || defined(V8_HOST_ARCH_S390)
|
|
INLINE(void CopyCharsUnsigned(uint8_t* dest, const uint8_t* src, size_t chars));
|
|
INLINE(void CopyCharsUnsigned(uint16_t* dest, const uint16_t* src,
|
|
size_t chars));
|
|
#endif
|
|
|
|
// Copy from 8bit/16bit chars to 8bit/16bit chars.
|
|
template <typename sourcechar, typename sinkchar>
|
|
INLINE(void CopyChars(sinkchar* dest, const sourcechar* src, size_t chars));
|
|
|
|
template <typename sourcechar, typename sinkchar>
|
|
void CopyChars(sinkchar* dest, const sourcechar* src, size_t chars) {
|
|
DCHECK(sizeof(sourcechar) <= 2);
|
|
DCHECK(sizeof(sinkchar) <= 2);
|
|
if (sizeof(sinkchar) == 1) {
|
|
if (sizeof(sourcechar) == 1) {
|
|
CopyCharsUnsigned(reinterpret_cast<uint8_t*>(dest),
|
|
reinterpret_cast<const uint8_t*>(src),
|
|
chars);
|
|
} else {
|
|
CopyCharsUnsigned(reinterpret_cast<uint8_t*>(dest),
|
|
reinterpret_cast<const uint16_t*>(src),
|
|
chars);
|
|
}
|
|
} else {
|
|
if (sizeof(sourcechar) == 1) {
|
|
CopyCharsUnsigned(reinterpret_cast<uint16_t*>(dest),
|
|
reinterpret_cast<const uint8_t*>(src),
|
|
chars);
|
|
} else {
|
|
CopyCharsUnsigned(reinterpret_cast<uint16_t*>(dest),
|
|
reinterpret_cast<const uint16_t*>(src),
|
|
chars);
|
|
}
|
|
}
|
|
}
|
|
|
|
template <typename sourcechar, typename sinkchar>
|
|
void CopyCharsUnsigned(sinkchar* dest, const sourcechar* src, size_t chars) {
|
|
sinkchar* limit = dest + chars;
|
|
if ((sizeof(*dest) == sizeof(*src)) &&
|
|
(chars >= static_cast<int>(kMinComplexMemCopy / sizeof(*dest)))) {
|
|
MemCopy(dest, src, chars * sizeof(*dest));
|
|
} else {
|
|
while (dest < limit) *dest++ = static_cast<sinkchar>(*src++);
|
|
}
|
|
}
|
|
|
|
|
|
#if defined(V8_HOST_ARCH_ARM)
|
|
void CopyCharsUnsigned(uint8_t* dest, const uint8_t* src, size_t chars) {
|
|
switch (static_cast<unsigned>(chars)) {
|
|
case 0:
|
|
break;
|
|
case 1:
|
|
*dest = *src;
|
|
break;
|
|
case 2:
|
|
memcpy(dest, src, 2);
|
|
break;
|
|
case 3:
|
|
memcpy(dest, src, 3);
|
|
break;
|
|
case 4:
|
|
memcpy(dest, src, 4);
|
|
break;
|
|
case 5:
|
|
memcpy(dest, src, 5);
|
|
break;
|
|
case 6:
|
|
memcpy(dest, src, 6);
|
|
break;
|
|
case 7:
|
|
memcpy(dest, src, 7);
|
|
break;
|
|
case 8:
|
|
memcpy(dest, src, 8);
|
|
break;
|
|
case 9:
|
|
memcpy(dest, src, 9);
|
|
break;
|
|
case 10:
|
|
memcpy(dest, src, 10);
|
|
break;
|
|
case 11:
|
|
memcpy(dest, src, 11);
|
|
break;
|
|
case 12:
|
|
memcpy(dest, src, 12);
|
|
break;
|
|
case 13:
|
|
memcpy(dest, src, 13);
|
|
break;
|
|
case 14:
|
|
memcpy(dest, src, 14);
|
|
break;
|
|
case 15:
|
|
memcpy(dest, src, 15);
|
|
break;
|
|
default:
|
|
MemCopy(dest, src, chars);
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
void CopyCharsUnsigned(uint16_t* dest, const uint8_t* src, size_t chars) {
|
|
if (chars >= static_cast<size_t>(kMinComplexConvertMemCopy)) {
|
|
MemCopyUint16Uint8(dest, src, chars);
|
|
} else {
|
|
MemCopyUint16Uint8Wrapper(dest, src, chars);
|
|
}
|
|
}
|
|
|
|
|
|
void CopyCharsUnsigned(uint16_t* dest, const uint16_t* src, size_t chars) {
|
|
switch (static_cast<unsigned>(chars)) {
|
|
case 0:
|
|
break;
|
|
case 1:
|
|
*dest = *src;
|
|
break;
|
|
case 2:
|
|
memcpy(dest, src, 4);
|
|
break;
|
|
case 3:
|
|
memcpy(dest, src, 6);
|
|
break;
|
|
case 4:
|
|
memcpy(dest, src, 8);
|
|
break;
|
|
case 5:
|
|
memcpy(dest, src, 10);
|
|
break;
|
|
case 6:
|
|
memcpy(dest, src, 12);
|
|
break;
|
|
case 7:
|
|
memcpy(dest, src, 14);
|
|
break;
|
|
default:
|
|
MemCopy(dest, src, chars * sizeof(*dest));
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
#elif defined(V8_HOST_ARCH_MIPS)
|
|
void CopyCharsUnsigned(uint8_t* dest, const uint8_t* src, size_t chars) {
|
|
if (chars < kMinComplexMemCopy) {
|
|
memcpy(dest, src, chars);
|
|
} else {
|
|
MemCopy(dest, src, chars);
|
|
}
|
|
}
|
|
|
|
void CopyCharsUnsigned(uint16_t* dest, const uint16_t* src, size_t chars) {
|
|
if (chars < kMinComplexMemCopy) {
|
|
memcpy(dest, src, chars * sizeof(*dest));
|
|
} else {
|
|
MemCopy(dest, src, chars * sizeof(*dest));
|
|
}
|
|
}
|
|
#elif defined(V8_HOST_ARCH_PPC) || defined(V8_HOST_ARCH_S390)
|
|
#define CASE(n) \
|
|
case n: \
|
|
memcpy(dest, src, n); \
|
|
break
|
|
void CopyCharsUnsigned(uint8_t* dest, const uint8_t* src, size_t chars) {
|
|
switch (static_cast<unsigned>(chars)) {
|
|
case 0:
|
|
break;
|
|
case 1:
|
|
*dest = *src;
|
|
break;
|
|
CASE(2);
|
|
CASE(3);
|
|
CASE(4);
|
|
CASE(5);
|
|
CASE(6);
|
|
CASE(7);
|
|
CASE(8);
|
|
CASE(9);
|
|
CASE(10);
|
|
CASE(11);
|
|
CASE(12);
|
|
CASE(13);
|
|
CASE(14);
|
|
CASE(15);
|
|
CASE(16);
|
|
CASE(17);
|
|
CASE(18);
|
|
CASE(19);
|
|
CASE(20);
|
|
CASE(21);
|
|
CASE(22);
|
|
CASE(23);
|
|
CASE(24);
|
|
CASE(25);
|
|
CASE(26);
|
|
CASE(27);
|
|
CASE(28);
|
|
CASE(29);
|
|
CASE(30);
|
|
CASE(31);
|
|
CASE(32);
|
|
CASE(33);
|
|
CASE(34);
|
|
CASE(35);
|
|
CASE(36);
|
|
CASE(37);
|
|
CASE(38);
|
|
CASE(39);
|
|
CASE(40);
|
|
CASE(41);
|
|
CASE(42);
|
|
CASE(43);
|
|
CASE(44);
|
|
CASE(45);
|
|
CASE(46);
|
|
CASE(47);
|
|
CASE(48);
|
|
CASE(49);
|
|
CASE(50);
|
|
CASE(51);
|
|
CASE(52);
|
|
CASE(53);
|
|
CASE(54);
|
|
CASE(55);
|
|
CASE(56);
|
|
CASE(57);
|
|
CASE(58);
|
|
CASE(59);
|
|
CASE(60);
|
|
CASE(61);
|
|
CASE(62);
|
|
CASE(63);
|
|
CASE(64);
|
|
default:
|
|
memcpy(dest, src, chars);
|
|
break;
|
|
}
|
|
}
|
|
#undef CASE
|
|
|
|
#define CASE(n) \
|
|
case n: \
|
|
memcpy(dest, src, n * 2); \
|
|
break
|
|
void CopyCharsUnsigned(uint16_t* dest, const uint16_t* src, size_t chars) {
|
|
switch (static_cast<unsigned>(chars)) {
|
|
case 0:
|
|
break;
|
|
case 1:
|
|
*dest = *src;
|
|
break;
|
|
CASE(2);
|
|
CASE(3);
|
|
CASE(4);
|
|
CASE(5);
|
|
CASE(6);
|
|
CASE(7);
|
|
CASE(8);
|
|
CASE(9);
|
|
CASE(10);
|
|
CASE(11);
|
|
CASE(12);
|
|
CASE(13);
|
|
CASE(14);
|
|
CASE(15);
|
|
CASE(16);
|
|
CASE(17);
|
|
CASE(18);
|
|
CASE(19);
|
|
CASE(20);
|
|
CASE(21);
|
|
CASE(22);
|
|
CASE(23);
|
|
CASE(24);
|
|
CASE(25);
|
|
CASE(26);
|
|
CASE(27);
|
|
CASE(28);
|
|
CASE(29);
|
|
CASE(30);
|
|
CASE(31);
|
|
CASE(32);
|
|
default:
|
|
memcpy(dest, src, chars * 2);
|
|
break;
|
|
}
|
|
}
|
|
#undef CASE
|
|
#endif
|
|
|
|
|
|
class StringBuilder : public SimpleStringBuilder {
|
|
public:
|
|
explicit StringBuilder(int size) : SimpleStringBuilder(size) { }
|
|
StringBuilder(char* buffer, int size) : SimpleStringBuilder(buffer, size) { }
|
|
|
|
// Add formatted contents to the builder just like printf().
|
|
void PRINTF_FORMAT(2, 3) AddFormatted(const char* format, ...);
|
|
|
|
// Add formatted contents like printf based on a va_list.
|
|
void PRINTF_FORMAT(2, 0) AddFormattedList(const char* format, va_list list);
|
|
|
|
private:
|
|
DISALLOW_IMPLICIT_CONSTRUCTORS(StringBuilder);
|
|
};
|
|
|
|
|
|
bool DoubleToBoolean(double d);
|
|
|
|
template <typename Stream>
|
|
bool StringToArrayIndex(Stream* stream, uint32_t* index) {
|
|
uint16_t ch = stream->GetNext();
|
|
|
|
// If the string begins with a '0' character, it must only consist
|
|
// of it to be a legal array index.
|
|
if (ch == '0') {
|
|
*index = 0;
|
|
return !stream->HasMore();
|
|
}
|
|
|
|
// Convert string to uint32 array index; character by character.
|
|
int d = ch - '0';
|
|
if (d < 0 || d > 9) return false;
|
|
uint32_t result = d;
|
|
while (stream->HasMore()) {
|
|
d = stream->GetNext() - '0';
|
|
if (d < 0 || d > 9) return false;
|
|
// Check that the new result is below the 32 bit limit.
|
|
if (result > 429496729U - ((d + 3) >> 3)) return false;
|
|
result = (result * 10) + d;
|
|
}
|
|
|
|
*index = result;
|
|
return true;
|
|
}
|
|
|
|
|
|
// Returns current value of top of the stack. Works correctly with ASAN.
|
|
DISABLE_ASAN
|
|
inline uintptr_t GetCurrentStackPosition() {
|
|
// Takes the address of the limit variable in order to find out where
|
|
// the top of stack is right now.
|
|
uintptr_t limit = reinterpret_cast<uintptr_t>(&limit);
|
|
return limit;
|
|
}
|
|
|
|
template <typename V>
|
|
static inline V ReadUnalignedValue(const void* p) {
|
|
#if !(V8_TARGET_ARCH_MIPS || V8_TARGET_ARCH_MIPS64)
|
|
return *reinterpret_cast<const V*>(p);
|
|
#else
|
|
V r;
|
|
memmove(&r, p, sizeof(V));
|
|
return r;
|
|
#endif // V8_TARGET_ARCH_MIPS || V8_TARGET_ARCH_MIPS64
|
|
}
|
|
|
|
template <typename V>
|
|
static inline void WriteUnalignedValue(void* p, V value) {
|
|
#if !(V8_TARGET_ARCH_MIPS || V8_TARGET_ARCH_MIPS64)
|
|
*(reinterpret_cast<V*>(p)) = value;
|
|
#else // V8_TARGET_ARCH_MIPS
|
|
memmove(p, &value, sizeof(V));
|
|
#endif // V8_TARGET_ARCH_MIPS || V8_TARGET_ARCH_MIPS64
|
|
}
|
|
|
|
static inline double ReadDoubleValue(const void* p) {
|
|
return ReadUnalignedValue<double>(p);
|
|
}
|
|
|
|
static inline void WriteDoubleValue(void* p, double value) {
|
|
WriteUnalignedValue(p, value);
|
|
}
|
|
|
|
static inline uint16_t ReadUnalignedUInt16(const void* p) {
|
|
return ReadUnalignedValue<uint16_t>(p);
|
|
}
|
|
|
|
static inline void WriteUnalignedUInt16(void* p, uint16_t value) {
|
|
WriteUnalignedValue(p, value);
|
|
}
|
|
|
|
static inline uint32_t ReadUnalignedUInt32(const void* p) {
|
|
return ReadUnalignedValue<uint32_t>(p);
|
|
}
|
|
|
|
static inline void WriteUnalignedUInt32(void* p, uint32_t value) {
|
|
WriteUnalignedValue(p, value);
|
|
}
|
|
|
|
} // namespace internal
|
|
} // namespace v8
|
|
|
|
#endif // V8_UTILS_H_
|