jbates@chromium.org | 0fc8736 | 2012-03-08 05:42:56 +0900 | [diff] [blame] | 1 | // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
license.bot | f003cfe | 2008-08-24 09:55:55 +0900 | [diff] [blame] | 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 4 | |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 5 | #include "base/pickle.h" |
| 6 | |
maruel@google.com | 825f879 | 2008-08-07 05:35:17 +0900 | [diff] [blame] | 7 | #include <stdlib.h> |
| 8 | |
thestig@chromium.org | eb9afb4 | 2009-10-28 13:21:01 +0900 | [diff] [blame] | 9 | #include <algorithm> // for max() |
dskiba | aa08dcb | 2015-10-01 02:24:30 +0900 | [diff] [blame] | 10 | #include <limits> |
maruel@google.com | 825f879 | 2008-08-07 05:35:17 +0900 | [diff] [blame] | 11 | |
primiano | 47c6906 | 2015-07-25 05:13:32 +0900 | [diff] [blame] | 12 | #include "base/bits.h" |
| 13 | #include "base/macros.h" |
avi | a6a6a68 | 2015-12-27 07:15:14 +0900 | [diff] [blame] | 14 | #include "build/build_config.h" |
primiano | 47c6906 | 2015-07-25 05:13:32 +0900 | [diff] [blame] | 15 | |
brettw | d0d6265 | 2015-06-04 01:20:14 +0900 | [diff] [blame] | 16 | namespace base { |
brettw@chromium.org | 5b04085 | 2013-12-03 09:39:26 +0900 | [diff] [blame] | 17 | |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 18 | // static |
| 19 | const int Pickle::kPayloadUnit = 64; |
| 20 | |
thestig@chromium.org | f0c8f44 | 2011-10-11 07:20:33 +0900 | [diff] [blame] | 21 | static const size_t kCapacityReadOnly = static_cast<size_t>(-1); |
deanm@google.com | 19650de | 2008-08-13 23:57:51 +0900 | [diff] [blame] | 22 | |
jbates@chromium.org | 0fc8736 | 2012-03-08 05:42:56 +0900 | [diff] [blame] | 23 | PickleIterator::PickleIterator(const Pickle& pickle) |
halyavin@google.com | 0398c72 | 2014-06-03 08:23:49 +0900 | [diff] [blame] | 24 | : payload_(pickle.payload()), |
| 25 | read_index_(0), |
| 26 | end_index_(pickle.payload_size()) { |
jbates@chromium.org | 0fc8736 | 2012-03-08 05:42:56 +0900 | [diff] [blame] | 27 | } |
| 28 | |
| 29 | template <typename Type> |
| 30 | inline bool PickleIterator::ReadBuiltinType(Type* result) { |
| 31 | const char* read_from = GetReadPointerAndAdvance<Type>(); |
| 32 | if (!read_from) |
| 33 | return false; |
avi | 27b4007 | 2015-12-05 07:38:52 +0900 | [diff] [blame] | 34 | if (sizeof(Type) > sizeof(uint32_t)) |
jbates@chromium.org | 0fc8736 | 2012-03-08 05:42:56 +0900 | [diff] [blame] | 35 | memcpy(result, read_from, sizeof(*result)); |
| 36 | else |
| 37 | *result = *reinterpret_cast<const Type*>(read_from); |
| 38 | return true; |
| 39 | } |
| 40 | |
halyavin@google.com | 0398c72 | 2014-06-03 08:23:49 +0900 | [diff] [blame] | 41 | inline void PickleIterator::Advance(size_t size) { |
primiano | 47c6906 | 2015-07-25 05:13:32 +0900 | [diff] [blame] | 42 | size_t aligned_size = bits::Align(size, sizeof(uint32_t)); |
halyavin@google.com | 0398c72 | 2014-06-03 08:23:49 +0900 | [diff] [blame] | 43 | if (end_index_ - read_index_ < aligned_size) { |
| 44 | read_index_ = end_index_; |
| 45 | } else { |
| 46 | read_index_ += aligned_size; |
| 47 | } |
| 48 | } |
| 49 | |
jbates@chromium.org | 0fc8736 | 2012-03-08 05:42:56 +0900 | [diff] [blame] | 50 | template<typename Type> |
| 51 | inline const char* PickleIterator::GetReadPointerAndAdvance() { |
halyavin@google.com | 0398c72 | 2014-06-03 08:23:49 +0900 | [diff] [blame] | 52 | if (sizeof(Type) > end_index_ - read_index_) { |
| 53 | read_index_ = end_index_; |
jbates@chromium.org | 0fc8736 | 2012-03-08 05:42:56 +0900 | [diff] [blame] | 54 | return NULL; |
halyavin@google.com | 0398c72 | 2014-06-03 08:23:49 +0900 | [diff] [blame] | 55 | } |
| 56 | const char* current_read_ptr = payload_ + read_index_; |
| 57 | Advance(sizeof(Type)); |
jbates@chromium.org | 0fc8736 | 2012-03-08 05:42:56 +0900 | [diff] [blame] | 58 | return current_read_ptr; |
| 59 | } |
| 60 | |
| 61 | const char* PickleIterator::GetReadPointerAndAdvance(int num_bytes) { |
halyavin@google.com | 0398c72 | 2014-06-03 08:23:49 +0900 | [diff] [blame] | 62 | if (num_bytes < 0 || |
| 63 | end_index_ - read_index_ < static_cast<size_t>(num_bytes)) { |
| 64 | read_index_ = end_index_; |
glider@chromium.org | fcfb825 | 2012-03-14 02:17:56 +0900 | [diff] [blame] | 65 | return NULL; |
halyavin@google.com | 0398c72 | 2014-06-03 08:23:49 +0900 | [diff] [blame] | 66 | } |
| 67 | const char* current_read_ptr = payload_ + read_index_; |
| 68 | Advance(num_bytes); |
jbates@chromium.org | 0fc8736 | 2012-03-08 05:42:56 +0900 | [diff] [blame] | 69 | return current_read_ptr; |
| 70 | } |
| 71 | |
halyavin@google.com | 0398c72 | 2014-06-03 08:23:49 +0900 | [diff] [blame] | 72 | inline const char* PickleIterator::GetReadPointerAndAdvance( |
| 73 | int num_elements, |
| 74 | size_t size_element) { |
avi | a6a6a68 | 2015-12-27 07:15:14 +0900 | [diff] [blame] | 75 | // Check for int32_t overflow. |
avi | 27b4007 | 2015-12-05 07:38:52 +0900 | [diff] [blame] | 76 | int64_t num_bytes = static_cast<int64_t>(num_elements) * size_element; |
jbates@chromium.org | 0fc8736 | 2012-03-08 05:42:56 +0900 | [diff] [blame] | 77 | int num_bytes32 = static_cast<int>(num_bytes); |
avi | 27b4007 | 2015-12-05 07:38:52 +0900 | [diff] [blame] | 78 | if (num_bytes != static_cast<int64_t>(num_bytes32)) |
jbates@chromium.org | 0fc8736 | 2012-03-08 05:42:56 +0900 | [diff] [blame] | 79 | return NULL; |
| 80 | return GetReadPointerAndAdvance(num_bytes32); |
| 81 | } |
| 82 | |
| 83 | bool PickleIterator::ReadBool(bool* result) { |
| 84 | return ReadBuiltinType(result); |
| 85 | } |
| 86 | |
| 87 | bool PickleIterator::ReadInt(int* result) { |
| 88 | return ReadBuiltinType(result); |
| 89 | } |
| 90 | |
| 91 | bool PickleIterator::ReadLong(long* result) { |
| 92 | return ReadBuiltinType(result); |
| 93 | } |
| 94 | |
avi | 27b4007 | 2015-12-05 07:38:52 +0900 | [diff] [blame] | 95 | bool PickleIterator::ReadUInt16(uint16_t* result) { |
jbates@chromium.org | 0fc8736 | 2012-03-08 05:42:56 +0900 | [diff] [blame] | 96 | return ReadBuiltinType(result); |
| 97 | } |
| 98 | |
avi | 27b4007 | 2015-12-05 07:38:52 +0900 | [diff] [blame] | 99 | bool PickleIterator::ReadUInt32(uint32_t* result) { |
jbates@chromium.org | 0fc8736 | 2012-03-08 05:42:56 +0900 | [diff] [blame] | 100 | return ReadBuiltinType(result); |
| 101 | } |
| 102 | |
avi | 27b4007 | 2015-12-05 07:38:52 +0900 | [diff] [blame] | 103 | bool PickleIterator::ReadInt64(int64_t* result) { |
jbates@chromium.org | 0fc8736 | 2012-03-08 05:42:56 +0900 | [diff] [blame] | 104 | return ReadBuiltinType(result); |
| 105 | } |
| 106 | |
avi | 27b4007 | 2015-12-05 07:38:52 +0900 | [diff] [blame] | 107 | bool PickleIterator::ReadUInt64(uint64_t* result) { |
jbates@chromium.org | 0fc8736 | 2012-03-08 05:42:56 +0900 | [diff] [blame] | 108 | return ReadBuiltinType(result); |
| 109 | } |
| 110 | |
pkasting | 7ed1f88 | 2014-10-02 12:01:04 +0900 | [diff] [blame] | 111 | bool PickleIterator::ReadSizeT(size_t* result) { |
| 112 | // Always read size_t as a 64-bit value to ensure compatibility between 32-bit |
| 113 | // and 64-bit processes. |
avi | 27b4007 | 2015-12-05 07:38:52 +0900 | [diff] [blame] | 114 | uint64_t result_uint64 = 0; |
pkasting | 7ed1f88 | 2014-10-02 12:01:04 +0900 | [diff] [blame] | 115 | bool success = ReadBuiltinType(&result_uint64); |
| 116 | *result = static_cast<size_t>(result_uint64); |
| 117 | // Fail if the cast above truncates the value. |
| 118 | return success && (*result == result_uint64); |
| 119 | } |
| 120 | |
rbyers@chromium.org | a1f0b98 | 2012-11-29 00:40:58 +0900 | [diff] [blame] | 121 | bool PickleIterator::ReadFloat(float* result) { |
piman@chromium.org | 2135b96 | 2013-11-18 09:50:25 +0900 | [diff] [blame] | 122 | // crbug.com/315213 |
| 123 | // The source data may not be properly aligned, and unaligned float reads |
| 124 | // cause SIGBUS on some ARM platforms, so force using memcpy to copy the data |
| 125 | // into the result. |
| 126 | const char* read_from = GetReadPointerAndAdvance<float>(); |
| 127 | if (!read_from) |
| 128 | return false; |
| 129 | memcpy(result, read_from, sizeof(*result)); |
| 130 | return true; |
rbyers@chromium.org | a1f0b98 | 2012-11-29 00:40:58 +0900 | [diff] [blame] | 131 | } |
| 132 | |
mostynb@opera.com | f0b7853 | 2014-07-15 07:50:32 +0900 | [diff] [blame] | 133 | bool PickleIterator::ReadDouble(double* result) { |
| 134 | // crbug.com/315213 |
| 135 | // The source data may not be properly aligned, and unaligned double reads |
| 136 | // cause SIGBUS on some ARM platforms, so force using memcpy to copy the data |
| 137 | // into the result. |
| 138 | const char* read_from = GetReadPointerAndAdvance<double>(); |
| 139 | if (!read_from) |
| 140 | return false; |
| 141 | memcpy(result, read_from, sizeof(*result)); |
| 142 | return true; |
| 143 | } |
| 144 | |
jbates@chromium.org | 0fc8736 | 2012-03-08 05:42:56 +0900 | [diff] [blame] | 145 | bool PickleIterator::ReadString(std::string* result) { |
| 146 | int len; |
| 147 | if (!ReadInt(&len)) |
| 148 | return false; |
| 149 | const char* read_from = GetReadPointerAndAdvance(len); |
| 150 | if (!read_from) |
| 151 | return false; |
| 152 | |
| 153 | result->assign(read_from, len); |
| 154 | return true; |
| 155 | } |
| 156 | |
brettw | d0d6265 | 2015-06-04 01:20:14 +0900 | [diff] [blame] | 157 | bool PickleIterator::ReadStringPiece(StringPiece* result) { |
brucedawson | 0fff389 | 2015-03-10 10:46:50 +0900 | [diff] [blame] | 158 | int len; |
| 159 | if (!ReadInt(&len)) |
| 160 | return false; |
| 161 | const char* read_from = GetReadPointerAndAdvance(len); |
| 162 | if (!read_from) |
| 163 | return false; |
| 164 | |
brettw | d0d6265 | 2015-06-04 01:20:14 +0900 | [diff] [blame] | 165 | *result = StringPiece(read_from, len); |
brucedawson | 0fff389 | 2015-03-10 10:46:50 +0900 | [diff] [blame] | 166 | return true; |
| 167 | } |
| 168 | |
jbates@chromium.org | 0fc8736 | 2012-03-08 05:42:56 +0900 | [diff] [blame] | 169 | bool PickleIterator::ReadString16(string16* result) { |
| 170 | int len; |
| 171 | if (!ReadInt(&len)) |
| 172 | return false; |
| 173 | const char* read_from = GetReadPointerAndAdvance(len, sizeof(char16)); |
| 174 | if (!read_from) |
| 175 | return false; |
| 176 | |
| 177 | result->assign(reinterpret_cast<const char16*>(read_from), len); |
| 178 | return true; |
| 179 | } |
| 180 | |
brettw | d0d6265 | 2015-06-04 01:20:14 +0900 | [diff] [blame] | 181 | bool PickleIterator::ReadStringPiece16(StringPiece16* result) { |
brucedawson | 0fff389 | 2015-03-10 10:46:50 +0900 | [diff] [blame] | 182 | int len; |
| 183 | if (!ReadInt(&len)) |
| 184 | return false; |
| 185 | const char* read_from = GetReadPointerAndAdvance(len, sizeof(char16)); |
| 186 | if (!read_from) |
| 187 | return false; |
| 188 | |
brettw | d0d6265 | 2015-06-04 01:20:14 +0900 | [diff] [blame] | 189 | *result = StringPiece16(reinterpret_cast<const char16*>(read_from), len); |
brucedawson | 0fff389 | 2015-03-10 10:46:50 +0900 | [diff] [blame] | 190 | return true; |
| 191 | } |
| 192 | |
jbates@chromium.org | 0fc8736 | 2012-03-08 05:42:56 +0900 | [diff] [blame] | 193 | bool PickleIterator::ReadData(const char** data, int* length) { |
| 194 | *length = 0; |
| 195 | *data = 0; |
| 196 | |
| 197 | if (!ReadInt(length)) |
| 198 | return false; |
| 199 | |
| 200 | return ReadBytes(data, *length); |
| 201 | } |
| 202 | |
| 203 | bool PickleIterator::ReadBytes(const char** data, int length) { |
| 204 | const char* read_from = GetReadPointerAndAdvance(length); |
| 205 | if (!read_from) |
| 206 | return false; |
| 207 | *data = read_from; |
| 208 | return true; |
| 209 | } |
| 210 | |
avi | 27b4007 | 2015-12-05 07:38:52 +0900 | [diff] [blame] | 211 | // Payload is uint32_t aligned. |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 212 | |
| 213 | Pickle::Pickle() |
| 214 | : header_(NULL), |
| 215 | header_size_(sizeof(Header)), |
piman@chromium.org | 5d3eee2 | 2013-10-31 13:03:02 +0900 | [diff] [blame] | 216 | capacity_after_header_(0), |
| 217 | write_offset_(0) { |
primiano | 47c6906 | 2015-07-25 05:13:32 +0900 | [diff] [blame] | 218 | static_assert((Pickle::kPayloadUnit & (Pickle::kPayloadUnit - 1)) == 0, |
| 219 | "Pickle::kPayloadUnit must be a power of two"); |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 220 | Resize(kPayloadUnit); |
| 221 | header_->payload_size = 0; |
| 222 | } |
| 223 | |
| 224 | Pickle::Pickle(int header_size) |
| 225 | : header_(NULL), |
avi | 27b4007 | 2015-12-05 07:38:52 +0900 | [diff] [blame] | 226 | header_size_(bits::Align(header_size, sizeof(uint32_t))), |
piman@chromium.org | 5d3eee2 | 2013-10-31 13:03:02 +0900 | [diff] [blame] | 227 | capacity_after_header_(0), |
| 228 | write_offset_(0) { |
pkasting@chromium.org | d23fe1a | 2011-04-01 05:34:25 +0900 | [diff] [blame] | 229 | DCHECK_GE(static_cast<size_t>(header_size), sizeof(Header)); |
kushi.p@gmail.com | e486977 | 2011-04-22 22:13:07 +0900 | [diff] [blame] | 230 | DCHECK_LE(header_size, kPayloadUnit); |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 231 | Resize(kPayloadUnit); |
| 232 | header_->payload_size = 0; |
| 233 | } |
| 234 | |
bbudge@chromium.org | ab4c6bc | 2013-11-05 07:28:12 +0900 | [diff] [blame] | 235 | Pickle::Pickle(const char* data, int data_len) |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 236 | : header_(reinterpret_cast<Header*>(const_cast<char*>(data))), |
rvargas@google.com | 8d9b2b9 | 2010-11-16 04:31:23 +0900 | [diff] [blame] | 237 | header_size_(0), |
piman@chromium.org | 5d3eee2 | 2013-10-31 13:03:02 +0900 | [diff] [blame] | 238 | capacity_after_header_(kCapacityReadOnly), |
| 239 | write_offset_(0) { |
bbudge@chromium.org | ab4c6bc | 2013-11-05 07:28:12 +0900 | [diff] [blame] | 240 | if (data_len >= static_cast<int>(sizeof(Header))) |
rvargas@google.com | 8d9b2b9 | 2010-11-16 04:31:23 +0900 | [diff] [blame] | 241 | header_size_ = data_len - header_->payload_size; |
| 242 | |
bbudge@chromium.org | ab4c6bc | 2013-11-05 07:28:12 +0900 | [diff] [blame] | 243 | if (header_size_ > static_cast<unsigned int>(data_len)) |
rvargas@google.com | 8d9b2b9 | 2010-11-16 04:31:23 +0900 | [diff] [blame] | 244 | header_size_ = 0; |
| 245 | |
avi | 27b4007 | 2015-12-05 07:38:52 +0900 | [diff] [blame] | 246 | if (header_size_ != bits::Align(header_size_, sizeof(uint32_t))) |
rvargas@google.com | 8d9b2b9 | 2010-11-16 04:31:23 +0900 | [diff] [blame] | 247 | header_size_ = 0; |
| 248 | |
| 249 | // If there is anything wrong with the data, we're not going to use it. |
| 250 | if (!header_size_) |
| 251 | header_ = NULL; |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 252 | } |
| 253 | |
| 254 | Pickle::Pickle(const Pickle& other) |
| 255 | : header_(NULL), |
| 256 | header_size_(other.header_size_), |
piman@chromium.org | 5d3eee2 | 2013-10-31 13:03:02 +0900 | [diff] [blame] | 257 | capacity_after_header_(0), |
| 258 | write_offset_(other.write_offset_) { |
erikchen | b2ca776 | 2015-09-09 08:36:29 +0900 | [diff] [blame] | 259 | Resize(other.header_->payload_size); |
| 260 | memcpy(header_, other.header_, header_size_ + other.header_->payload_size); |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 261 | } |
| 262 | |
| 263 | Pickle::~Pickle() { |
piman@chromium.org | 5d3eee2 | 2013-10-31 13:03:02 +0900 | [diff] [blame] | 264 | if (capacity_after_header_ != kCapacityReadOnly) |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 265 | free(header_); |
| 266 | } |
| 267 | |
| 268 | Pickle& Pickle::operator=(const Pickle& other) { |
jar@chromium.org | 4e105f1 | 2009-08-08 08:13:35 +0900 | [diff] [blame] | 269 | if (this == &other) { |
| 270 | NOTREACHED(); |
| 271 | return *this; |
| 272 | } |
piman@chromium.org | 5d3eee2 | 2013-10-31 13:03:02 +0900 | [diff] [blame] | 273 | if (capacity_after_header_ == kCapacityReadOnly) { |
jar@chromium.org | 766c5a0 | 2009-08-03 16:01:47 +0900 | [diff] [blame] | 274 | header_ = NULL; |
piman@chromium.org | 5d3eee2 | 2013-10-31 13:03:02 +0900 | [diff] [blame] | 275 | capacity_after_header_ = 0; |
jar@chromium.org | 766c5a0 | 2009-08-03 16:01:47 +0900 | [diff] [blame] | 276 | } |
| 277 | if (header_size_ != other.header_size_) { |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 278 | free(header_); |
| 279 | header_ = NULL; |
| 280 | header_size_ = other.header_size_; |
| 281 | } |
piman@chromium.org | 5d3eee2 | 2013-10-31 13:03:02 +0900 | [diff] [blame] | 282 | Resize(other.header_->payload_size); |
jar@chromium.org | 4e105f1 | 2009-08-08 08:13:35 +0900 | [diff] [blame] | 283 | memcpy(header_, other.header_, |
| 284 | other.header_size_ + other.header_->payload_size); |
piman@chromium.org | 5d3eee2 | 2013-10-31 13:03:02 +0900 | [diff] [blame] | 285 | write_offset_ = other.write_offset_; |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 286 | return *this; |
| 287 | } |
| 288 | |
brettw | d0d6265 | 2015-06-04 01:20:14 +0900 | [diff] [blame] | 289 | bool Pickle::WriteString(const StringPiece& value) { |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 290 | if (!WriteInt(static_cast<int>(value.size()))) |
| 291 | return false; |
| 292 | |
| 293 | return WriteBytes(value.data(), static_cast<int>(value.size())); |
| 294 | } |
| 295 | |
brettw | d0d6265 | 2015-06-04 01:20:14 +0900 | [diff] [blame] | 296 | bool Pickle::WriteString16(const StringPiece16& value) { |
estade@chromium.org | 38a18bf | 2009-03-04 12:36:36 +0900 | [diff] [blame] | 297 | if (!WriteInt(static_cast<int>(value.size()))) |
| 298 | return false; |
| 299 | |
| 300 | return WriteBytes(value.data(), |
| 301 | static_cast<int>(value.size()) * sizeof(char16)); |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 302 | } |
| 303 | |
| 304 | bool Pickle::WriteData(const char* data, int length) { |
wtc@chromium.org | c2f15c5 | 2009-07-29 06:00:03 +0900 | [diff] [blame] | 305 | return length >= 0 && WriteInt(length) && WriteBytes(data, length); |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 306 | } |
| 307 | |
piman@chromium.org | 5d3eee2 | 2013-10-31 13:03:02 +0900 | [diff] [blame] | 308 | bool Pickle::WriteBytes(const void* data, int length) { |
| 309 | WriteBytesCommon(data, length); |
erg@google.com | 67a2543 | 2011-01-08 05:23:43 +0900 | [diff] [blame] | 310 | return true; |
| 311 | } |
| 312 | |
piman@chromium.org | 5d3eee2 | 2013-10-31 13:03:02 +0900 | [diff] [blame] | 313 | void Pickle::Reserve(size_t length) { |
avi | 27b4007 | 2015-12-05 07:38:52 +0900 | [diff] [blame] | 314 | size_t data_len = bits::Align(length, sizeof(uint32_t)); |
piman@chromium.org | 5d3eee2 | 2013-10-31 13:03:02 +0900 | [diff] [blame] | 315 | DCHECK_GE(data_len, length); |
erg@google.com | 67a2543 | 2011-01-08 05:23:43 +0900 | [diff] [blame] | 316 | #ifdef ARCH_CPU_64_BITS |
avi | 27b4007 | 2015-12-05 07:38:52 +0900 | [diff] [blame] | 317 | DCHECK_LE(data_len, std::numeric_limits<uint32_t>::max()); |
erg@google.com | 67a2543 | 2011-01-08 05:23:43 +0900 | [diff] [blame] | 318 | #endif |
avi | 27b4007 | 2015-12-05 07:38:52 +0900 | [diff] [blame] | 319 | DCHECK_LE(write_offset_, std::numeric_limits<uint32_t>::max() - data_len); |
piman@chromium.org | 5d3eee2 | 2013-10-31 13:03:02 +0900 | [diff] [blame] | 320 | size_t new_size = write_offset_ + data_len; |
| 321 | if (new_size > capacity_after_header_) |
| 322 | Resize(capacity_after_header_ * 2 + new_size); |
erg@google.com | 67a2543 | 2011-01-08 05:23:43 +0900 | [diff] [blame] | 323 | } |
| 324 | |
piman@chromium.org | 5d3eee2 | 2013-10-31 13:03:02 +0900 | [diff] [blame] | 325 | void Pickle::Resize(size_t new_capacity) { |
piman@chromium.org | 5d3eee2 | 2013-10-31 13:03:02 +0900 | [diff] [blame] | 326 | CHECK_NE(capacity_after_header_, kCapacityReadOnly); |
primiano | 47c6906 | 2015-07-25 05:13:32 +0900 | [diff] [blame] | 327 | capacity_after_header_ = bits::Align(new_capacity, kPayloadUnit); |
primiano | 03f7750 | 2015-06-12 06:40:10 +0900 | [diff] [blame] | 328 | void* p = realloc(header_, GetTotalAllocatedSize()); |
piman@chromium.org | 5d3eee2 | 2013-10-31 13:03:02 +0900 | [diff] [blame] | 329 | CHECK(p); |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 330 | header_ = reinterpret_cast<Header*>(p); |
primiano | 03f7750 | 2015-06-12 06:40:10 +0900 | [diff] [blame] | 331 | } |
| 332 | |
rockot | 76180b0 | 2015-12-17 15:19:49 +0900 | [diff] [blame] | 333 | void* Pickle::ClaimBytes(size_t num_bytes) { |
| 334 | void* p = ClaimUninitializedBytesInternal(num_bytes); |
| 335 | CHECK(p); |
| 336 | memset(p, 0, num_bytes); |
| 337 | return p; |
| 338 | } |
| 339 | |
primiano | 03f7750 | 2015-06-12 06:40:10 +0900 | [diff] [blame] | 340 | size_t Pickle::GetTotalAllocatedSize() const { |
| 341 | if (capacity_after_header_ == kCapacityReadOnly) |
| 342 | return 0; |
| 343 | return header_size_ + capacity_after_header_; |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 344 | } |
| 345 | |
| 346 | // static |
| 347 | const char* Pickle::FindNext(size_t header_size, |
| 348 | const char* start, |
| 349 | const char* end) { |
dskiba | aa08dcb | 2015-10-01 02:24:30 +0900 | [diff] [blame] | 350 | size_t pickle_size = 0; |
| 351 | if (!PeekNext(header_size, start, end, &pickle_size)) |
| 352 | return NULL; |
| 353 | |
| 354 | if (pickle_size > static_cast<size_t>(end - start)) |
| 355 | return NULL; |
| 356 | |
| 357 | return start + pickle_size; |
| 358 | } |
| 359 | |
| 360 | // static |
| 361 | bool Pickle::PeekNext(size_t header_size, |
| 362 | const char* start, |
| 363 | const char* end, |
| 364 | size_t* pickle_size) { |
avi | 27b4007 | 2015-12-05 07:38:52 +0900 | [diff] [blame] | 365 | DCHECK_EQ(header_size, bits::Align(header_size, sizeof(uint32_t))); |
dskiba | aa08dcb | 2015-10-01 02:24:30 +0900 | [diff] [blame] | 366 | DCHECK_GE(header_size, sizeof(Header)); |
kushi.p@gmail.com | e486977 | 2011-04-22 22:13:07 +0900 | [diff] [blame] | 367 | DCHECK_LE(header_size, static_cast<size_t>(kPayloadUnit)); |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 368 | |
halyavin@google.com | 893e5bb | 2013-11-01 18:06:26 +0900 | [diff] [blame] | 369 | size_t length = static_cast<size_t>(end - start); |
| 370 | if (length < sizeof(Header)) |
dskiba | aa08dcb | 2015-10-01 02:24:30 +0900 | [diff] [blame] | 371 | return false; |
glider@chromium.org | 8b725fa | 2011-01-26 22:02:27 +0900 | [diff] [blame] | 372 | |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 373 | const Header* hdr = reinterpret_cast<const Header*>(start); |
dskiba | aa08dcb | 2015-10-01 02:24:30 +0900 | [diff] [blame] | 374 | if (length < header_size) |
| 375 | return false; |
| 376 | |
| 377 | if (hdr->payload_size > std::numeric_limits<size_t>::max() - header_size) { |
| 378 | // If payload_size causes an overflow, we return maximum possible |
| 379 | // pickle size to indicate that. |
| 380 | *pickle_size = std::numeric_limits<size_t>::max(); |
| 381 | } else { |
| 382 | *pickle_size = header_size + hdr->payload_size; |
| 383 | } |
| 384 | return true; |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 385 | } |
piman@chromium.org | 5d3eee2 | 2013-10-31 13:03:02 +0900 | [diff] [blame] | 386 | |
| 387 | template <size_t length> void Pickle::WriteBytesStatic(const void* data) { |
| 388 | WriteBytesCommon(data, length); |
| 389 | } |
| 390 | |
| 391 | template void Pickle::WriteBytesStatic<2>(const void* data); |
| 392 | template void Pickle::WriteBytesStatic<4>(const void* data); |
| 393 | template void Pickle::WriteBytesStatic<8>(const void* data); |
| 394 | |
rockot | 76180b0 | 2015-12-17 15:19:49 +0900 | [diff] [blame] | 395 | inline void* Pickle::ClaimUninitializedBytesInternal(size_t length) { |
piman@chromium.org | 5d3eee2 | 2013-10-31 13:03:02 +0900 | [diff] [blame] | 396 | DCHECK_NE(kCapacityReadOnly, capacity_after_header_) |
| 397 | << "oops: pickle is readonly"; |
avi | 27b4007 | 2015-12-05 07:38:52 +0900 | [diff] [blame] | 398 | size_t data_len = bits::Align(length, sizeof(uint32_t)); |
piman@chromium.org | 5d3eee2 | 2013-10-31 13:03:02 +0900 | [diff] [blame] | 399 | DCHECK_GE(data_len, length); |
| 400 | #ifdef ARCH_CPU_64_BITS |
avi | 27b4007 | 2015-12-05 07:38:52 +0900 | [diff] [blame] | 401 | DCHECK_LE(data_len, std::numeric_limits<uint32_t>::max()); |
piman@chromium.org | 5d3eee2 | 2013-10-31 13:03:02 +0900 | [diff] [blame] | 402 | #endif |
avi | 27b4007 | 2015-12-05 07:38:52 +0900 | [diff] [blame] | 403 | DCHECK_LE(write_offset_, std::numeric_limits<uint32_t>::max() - data_len); |
piman@chromium.org | 5d3eee2 | 2013-10-31 13:03:02 +0900 | [diff] [blame] | 404 | size_t new_size = write_offset_ + data_len; |
| 405 | if (new_size > capacity_after_header_) { |
primiano | 47c6906 | 2015-07-25 05:13:32 +0900 | [diff] [blame] | 406 | size_t new_capacity = capacity_after_header_ * 2; |
| 407 | const size_t kPickleHeapAlign = 4096; |
| 408 | if (new_capacity > kPickleHeapAlign) |
| 409 | new_capacity = bits::Align(new_capacity, kPickleHeapAlign) - kPayloadUnit; |
| 410 | Resize(std::max(new_capacity, new_size)); |
piman@chromium.org | 5d3eee2 | 2013-10-31 13:03:02 +0900 | [diff] [blame] | 411 | } |
| 412 | |
| 413 | char* write = mutable_payload() + write_offset_; |
rockot | 76180b0 | 2015-12-17 15:19:49 +0900 | [diff] [blame] | 414 | memset(write + length, 0, data_len - length); // Always initialize padding |
avi | 27b4007 | 2015-12-05 07:38:52 +0900 | [diff] [blame] | 415 | header_->payload_size = static_cast<uint32_t>(new_size); |
piman@chromium.org | 5d3eee2 | 2013-10-31 13:03:02 +0900 | [diff] [blame] | 416 | write_offset_ = new_size; |
rockot | 76180b0 | 2015-12-17 15:19:49 +0900 | [diff] [blame] | 417 | return write; |
| 418 | } |
| 419 | |
| 420 | inline void Pickle::WriteBytesCommon(const void* data, size_t length) { |
| 421 | DCHECK_NE(kCapacityReadOnly, capacity_after_header_) |
| 422 | << "oops: pickle is readonly"; |
| 423 | MSAN_CHECK_MEM_IS_INITIALIZED(data, length); |
| 424 | void* write = ClaimUninitializedBytesInternal(length); |
| 425 | memcpy(write, data, length); |
piman@chromium.org | 5d3eee2 | 2013-10-31 13:03:02 +0900 | [diff] [blame] | 426 | } |
brettw | d0d6265 | 2015-06-04 01:20:14 +0900 | [diff] [blame] | 427 | |
| 428 | } // namespace base |