1 /* 2 * Copyright (C) 2005 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #define LOG_TAG "Parcel" 18 //#define LOG_NDEBUG 0 19 20 #include <binder/Parcel.h> 21 22 #include <binder/IPCThreadState.h> 23 #include <binder/Binder.h> 24 #include <binder/BpBinder.h> 25 #include <utils/Debug.h> 26 #include <binder/ProcessState.h> 27 #include <utils/Log.h> 28 #include <utils/String8.h> 29 #include <utils/String16.h> 30 #include <utils/TextOutput.h> 31 #include <utils/misc.h> 32 #include <utils/Flattenable.h> 33 #include <cutils/ashmem.h> 34 35 #include <private/binder/binder_module.h> 36 37 #include <stdio.h> 38 #include <stdlib.h> 39 #include <stdint.h> 40 #include <sys/mman.h> 41 42 #ifndef INT32_MAX 43 #define INT32_MAX ((int32_t)(2147483647)) 44 #endif 45 46 #define LOG_REFS(...) 47 //#define LOG_REFS(...) LOG(LOG_DEBUG, "Parcel", __VA_ARGS__) 48 49 // --------------------------------------------------------------------------- 50 51 #define PAD_SIZE(s) (((s)+3)&~3) 52 53 // Note: must be kept in sync with android/os/StrictMode.java's PENALTY_GATHER 54 #define STRICT_MODE_PENALTY_GATHER 0x100 55 56 // Note: must be kept in sync with android/os/Parcel.java's EX_HAS_REPLY_HEADER 57 #define EX_HAS_REPLY_HEADER -128 58 59 // Maximum size of a blob to transfer in-place. 60 static const size_t IN_PLACE_BLOB_LIMIT = 40 * 1024; 61 62 // XXX This can be made public if we want to provide 63 // support for typed data. 64 struct small_flat_data 65 { 66 uint32_t type; 67 uint32_t data; 68 }; 69 70 namespace android { 71 72 void acquire_object(const sp<ProcessState>& proc, 73 const flat_binder_object& obj, const void* who) 74 { 75 switch (obj.type) { 76 case BINDER_TYPE_BINDER: 77 if (obj.binder) { 78 LOG_REFS("Parcel %p acquiring reference on local %p", who, obj.cookie); 79 static_cast<IBinder*>(obj.cookie)->incStrong(who); 80 } 81 return; 82 case BINDER_TYPE_WEAK_BINDER: 83 if (obj.binder) 84 static_cast<RefBase::weakref_type*>(obj.binder)->incWeak(who); 85 return; 86 case BINDER_TYPE_HANDLE: { 87 const sp<IBinder> b = proc->getStrongProxyForHandle(obj.handle); 88 if (b != NULL) { 89 LOG_REFS("Parcel %p acquiring reference on remote %p", who, b.get()); 90 b->incStrong(who); 91 } 92 return; 93 } 94 case BINDER_TYPE_WEAK_HANDLE: { 95 const wp<IBinder> b = proc->getWeakProxyForHandle(obj.handle); 96 if (b != NULL) b.get_refs()->incWeak(who); 97 return; 98 } 99 case BINDER_TYPE_FD: { 100 // intentionally blank -- nothing to do to acquire this, but we do 101 // recognize it as a legitimate object type. 102 return; 103 } 104 } 105 106 LOGD("Invalid object type 0x%08lx", obj.type); 107 } 108 109 void release_object(const sp<ProcessState>& proc, 110 const flat_binder_object& obj, const void* who) 111 { 112 switch (obj.type) { 113 case BINDER_TYPE_BINDER: 114 if (obj.binder) { 115 LOG_REFS("Parcel %p releasing reference on local %p", who, obj.cookie); 116 static_cast<IBinder*>(obj.cookie)->decStrong(who); 117 } 118 return; 119 case BINDER_TYPE_WEAK_BINDER: 120 if (obj.binder) 121 static_cast<RefBase::weakref_type*>(obj.binder)->decWeak(who); 122 return; 123 case BINDER_TYPE_HANDLE: { 124 const sp<IBinder> b = proc->getStrongProxyForHandle(obj.handle); 125 if (b != NULL) { 126 LOG_REFS("Parcel %p releasing reference on remote %p", who, b.get()); 127 b->decStrong(who); 128 } 129 return; 130 } 131 case BINDER_TYPE_WEAK_HANDLE: { 132 const wp<IBinder> b = proc->getWeakProxyForHandle(obj.handle); 133 if (b != NULL) b.get_refs()->decWeak(who); 134 return; 135 } 136 case BINDER_TYPE_FD: { 137 if (obj.cookie != (void*)0) close(obj.handle); 138 return; 139 } 140 } 141 142 LOGE("Invalid object type 0x%08lx", obj.type); 143 } 144 145 inline static status_t finish_flatten_binder( 146 const sp<IBinder>& binder, const flat_binder_object& flat, Parcel* out) 147 { 148 return out->writeObject(flat, false); 149 } 150 151 status_t flatten_binder(const sp<ProcessState>& proc, 152 const sp<IBinder>& binder, Parcel* out) 153 { 154 flat_binder_object obj; 155 156 obj.flags = 0x7f | FLAT_BINDER_FLAG_ACCEPTS_FDS; 157 if (binder != NULL) { 158 IBinder *local = binder->localBinder(); 159 if (!local) { 160 BpBinder *proxy = binder->remoteBinder(); 161 if (proxy == NULL) { 162 LOGE("null proxy"); 163 } 164 const int32_t handle = proxy ? proxy->handle() : 0; 165 obj.type = BINDER_TYPE_HANDLE; 166 obj.handle = handle; 167 obj.cookie = NULL; 168 } else { 169 obj.type = BINDER_TYPE_BINDER; 170 obj.binder = local->getWeakRefs(); 171 obj.cookie = local; 172 } 173 } else { 174 obj.type = BINDER_TYPE_BINDER; 175 obj.binder = NULL; 176 obj.cookie = NULL; 177 } 178 179 return finish_flatten_binder(binder, obj, out); 180 } 181 182 status_t flatten_binder(const sp<ProcessState>& proc, 183 const wp<IBinder>& binder, Parcel* out) 184 { 185 flat_binder_object obj; 186 187 obj.flags = 0x7f | FLAT_BINDER_FLAG_ACCEPTS_FDS; 188 if (binder != NULL) { 189 sp<IBinder> real = binder.promote(); 190 if (real != NULL) { 191 IBinder *local = real->localBinder(); 192 if (!local) { 193 BpBinder *proxy = real->remoteBinder(); 194 if (proxy == NULL) { 195 LOGE("null proxy"); 196 } 197 const int32_t handle = proxy ? proxy->handle() : 0; 198 obj.type = BINDER_TYPE_WEAK_HANDLE; 199 obj.handle = handle; 200 obj.cookie = NULL; 201 } else { 202 obj.type = BINDER_TYPE_WEAK_BINDER; 203 obj.binder = binder.get_refs(); 204 obj.cookie = binder.unsafe_get(); 205 } 206 return finish_flatten_binder(real, obj, out); 207 } 208 209 // XXX How to deal? In order to flatten the given binder, 210 // we need to probe it for information, which requires a primary 211 // reference... but we don't have one. 212 // 213 // The OpenBinder implementation uses a dynamic_cast<> here, 214 // but we can't do that with the different reference counting 215 // implementation we are using. 216 LOGE("Unable to unflatten Binder weak reference!"); 217 obj.type = BINDER_TYPE_BINDER; 218 obj.binder = NULL; 219 obj.cookie = NULL; 220 return finish_flatten_binder(NULL, obj, out); 221 222 } else { 223 obj.type = BINDER_TYPE_BINDER; 224 obj.binder = NULL; 225 obj.cookie = NULL; 226 return finish_flatten_binder(NULL, obj, out); 227 } 228 } 229 230 inline static status_t finish_unflatten_binder( 231 BpBinder* proxy, const flat_binder_object& flat, const Parcel& in) 232 { 233 return NO_ERROR; 234 } 235 236 status_t unflatten_binder(const sp<ProcessState>& proc, 237 const Parcel& in, sp<IBinder>* out) 238 { 239 const flat_binder_object* flat = in.readObject(false); 240 241 if (flat) { 242 switch (flat->type) { 243 case BINDER_TYPE_BINDER: 244 *out = static_cast<IBinder*>(flat->cookie); 245 return finish_unflatten_binder(NULL, *flat, in); 246 case BINDER_TYPE_HANDLE: 247 *out = proc->getStrongProxyForHandle(flat->handle); 248 return finish_unflatten_binder( 249 static_cast<BpBinder*>(out->get()), *flat, in); 250 } 251 } 252 return BAD_TYPE; 253 } 254 255 status_t unflatten_binder(const sp<ProcessState>& proc, 256 const Parcel& in, wp<IBinder>* out) 257 { 258 const flat_binder_object* flat = in.readObject(false); 259 260 if (flat) { 261 switch (flat->type) { 262 case BINDER_TYPE_BINDER: 263 *out = static_cast<IBinder*>(flat->cookie); 264 return finish_unflatten_binder(NULL, *flat, in); 265 case BINDER_TYPE_WEAK_BINDER: 266 if (flat->binder != NULL) { 267 out->set_object_and_refs( 268 static_cast<IBinder*>(flat->cookie), 269 static_cast<RefBase::weakref_type*>(flat->binder)); 270 } else { 271 *out = NULL; 272 } 273 return finish_unflatten_binder(NULL, *flat, in); 274 case BINDER_TYPE_HANDLE: 275 case BINDER_TYPE_WEAK_HANDLE: 276 *out = proc->getWeakProxyForHandle(flat->handle); 277 return finish_unflatten_binder( 278 static_cast<BpBinder*>(out->unsafe_get()), *flat, in); 279 } 280 } 281 return BAD_TYPE; 282 } 283 284 // --------------------------------------------------------------------------- 285 286 Parcel::Parcel() 287 { 288 initState(); 289 } 290 291 Parcel::~Parcel() 292 { 293 freeDataNoInit(); 294 } 295 296 const uint8_t* Parcel::data() const 297 { 298 return mData; 299 } 300 301 size_t Parcel::dataSize() const 302 { 303 return (mDataSize > mDataPos ? mDataSize : mDataPos); 304 } 305 306 size_t Parcel::dataAvail() const 307 { 308 // TODO: decide what to do about the possibility that this can 309 // report an available-data size that exceeds a Java int's max 310 // positive value, causing havoc. Fortunately this will only 311 // happen if someone constructs a Parcel containing more than two 312 // gigabytes of data, which on typical phone hardware is simply 313 // not possible. 314 return dataSize() - dataPosition(); 315 } 316 317 size_t Parcel::dataPosition() const 318 { 319 return mDataPos; 320 } 321 322 size_t Parcel::dataCapacity() const 323 { 324 return mDataCapacity; 325 } 326 327 status_t Parcel::setDataSize(size_t size) 328 { 329 status_t err; 330 err = continueWrite(size); 331 if (err == NO_ERROR) { 332 mDataSize = size; 333 LOGV("setDataSize Setting data size of %p to %d\n", this, mDataSize); 334 } 335 return err; 336 } 337 338 void Parcel::setDataPosition(size_t pos) const 339 { 340 mDataPos = pos; 341 mNextObjectHint = 0; 342 } 343 344 status_t Parcel::setDataCapacity(size_t size) 345 { 346 if (size > mDataCapacity) return continueWrite(size); 347 return NO_ERROR; 348 } 349 350 status_t Parcel::setData(const uint8_t* buffer, size_t len) 351 { 352 status_t err = restartWrite(len); 353 if (err == NO_ERROR) { 354 memcpy(const_cast<uint8_t*>(data()), buffer, len); 355 mDataSize = len; 356 mFdsKnown = false; 357 } 358 return err; 359 } 360 361 status_t Parcel::appendFrom(const Parcel *parcel, size_t offset, size_t len) 362 { 363 const sp<ProcessState> proc(ProcessState::self()); 364 status_t err; 365 const uint8_t *data = parcel->mData; 366 const size_t *objects = parcel->mObjects; 367 size_t size = parcel->mObjectsSize; 368 int startPos = mDataPos; 369 int firstIndex = -1, lastIndex = -2; 370 371 if (len == 0) { 372 return NO_ERROR; 373 } 374 375 // range checks against the source parcel size 376 if ((offset > parcel->mDataSize) 377 || (len > parcel->mDataSize) 378 || (offset + len > parcel->mDataSize)) { 379 return BAD_VALUE; 380 } 381 382 // Count objects in range 383 for (int i = 0; i < (int) size; i++) { 384 size_t off = objects[i]; 385 if ((off >= offset) && (off < offset + len)) { 386 if (firstIndex == -1) { 387 firstIndex = i; 388 } 389 lastIndex = i; 390 } 391 } 392 int numObjects = lastIndex - firstIndex + 1; 393 394 if ((mDataSize+len) > mDataCapacity) { 395 // grow data 396 err = growData(len); 397 if (err != NO_ERROR) { 398 return err; 399 } 400 } 401 402 // append data 403 memcpy(mData + mDataPos, data + offset, len); 404 mDataPos += len; 405 mDataSize += len; 406 407 err = NO_ERROR; 408 409 if (numObjects > 0) { 410 // grow objects 411 if (mObjectsCapacity < mObjectsSize + numObjects) { 412 int newSize = ((mObjectsSize + numObjects)*3)/2; 413 size_t *objects = 414 (size_t*)realloc(mObjects, newSize*sizeof(size_t)); 415 if (objects == (size_t*)0) { 416 return NO_MEMORY; 417 } 418 mObjects = objects; 419 mObjectsCapacity = newSize; 420 } 421 422 // append and acquire objects 423 int idx = mObjectsSize; 424 for (int i = firstIndex; i <= lastIndex; i++) { 425 size_t off = objects[i] - offset + startPos; 426 mObjects[idx++] = off; 427 mObjectsSize++; 428 429 flat_binder_object* flat 430 = reinterpret_cast<flat_binder_object*>(mData + off); 431 acquire_object(proc, *flat, this); 432 433 if (flat->type == BINDER_TYPE_FD) { 434 // If this is a file descriptor, we need to dup it so the 435 // new Parcel now owns its own fd, and can declare that we 436 // officially know we have fds. 437 flat->handle = dup(flat->handle); 438 flat->cookie = (void*)1; 439 mHasFds = mFdsKnown = true; 440 if (!mAllowFds) { 441 err = FDS_NOT_ALLOWED; 442 } 443 } 444 } 445 } 446 447 return err; 448 } 449 450 bool Parcel::pushAllowFds(bool allowFds) 451 { 452 const bool origValue = mAllowFds; 453 if (!allowFds) { 454 mAllowFds = false; 455 } 456 return origValue; 457 } 458 459 void Parcel::restoreAllowFds(bool lastValue) 460 { 461 mAllowFds = lastValue; 462 } 463 464 bool Parcel::hasFileDescriptors() const 465 { 466 if (!mFdsKnown) { 467 scanForFds(); 468 } 469 return mHasFds; 470 } 471 472 // Write RPC headers. (previously just the interface token) 473 status_t Parcel::writeInterfaceToken(const String16& interface) 474 { 475 writeInt32(IPCThreadState::self()->getStrictModePolicy() | 476 STRICT_MODE_PENALTY_GATHER); 477 // currently the interface identification token is just its name as a string 478 return writeString16(interface); 479 } 480 481 bool Parcel::checkInterface(IBinder* binder) const 482 { 483 return enforceInterface(binder->getInterfaceDescriptor()); 484 } 485 486 bool Parcel::enforceInterface(const String16& interface, 487 IPCThreadState* threadState) const 488 { 489 int32_t strictPolicy = readInt32(); 490 if (threadState == NULL) { 491 threadState = IPCThreadState::self(); 492 } 493 if ((threadState->getLastTransactionBinderFlags() & 494 IBinder::FLAG_ONEWAY) != 0) { 495 // For one-way calls, the callee is running entirely 496 // disconnected from the caller, so disable StrictMode entirely. 497 // Not only does disk/network usage not impact the caller, but 498 // there's no way to commuicate back any violations anyway. 499 threadState->setStrictModePolicy(0); 500 } else { 501 threadState->setStrictModePolicy(strictPolicy); 502 } 503 const String16 str(readString16()); 504 if (str == interface) { 505 return true; 506 } else { 507 LOGW("**** enforceInterface() expected '%s' but read '%s'\n", 508 String8(interface).string(), String8(str).string()); 509 return false; 510 } 511 } 512 513 const size_t* Parcel::objects() const 514 { 515 return mObjects; 516 } 517 518 size_t Parcel::objectsCount() const 519 { 520 return mObjectsSize; 521 } 522 523 status_t Parcel::errorCheck() const 524 { 525 return mError; 526 } 527 528 void Parcel::setError(status_t err) 529 { 530 mError = err; 531 } 532 533 status_t Parcel::finishWrite(size_t len) 534 { 535 //printf("Finish write of %d\n", len); 536 mDataPos += len; 537 LOGV("finishWrite Setting data pos of %p to %d\n", this, mDataPos); 538 if (mDataPos > mDataSize) { 539 mDataSize = mDataPos; 540 LOGV("finishWrite Setting data size of %p to %d\n", this, mDataSize); 541 } 542 //printf("New pos=%d, size=%d\n", mDataPos, mDataSize); 543 return NO_ERROR; 544 } 545 546 status_t Parcel::writeUnpadded(const void* data, size_t len) 547 { 548 size_t end = mDataPos + len; 549 if (end < mDataPos) { 550 // integer overflow 551 return BAD_VALUE; 552 } 553 554 if (end <= mDataCapacity) { 555 restart_write: 556 memcpy(mData+mDataPos, data, len); 557 return finishWrite(len); 558 } 559 560 status_t err = growData(len); 561 if (err == NO_ERROR) goto restart_write; 562 return err; 563 } 564 565 status_t Parcel::write(const void* data, size_t len) 566 { 567 void* const d = writeInplace(len); 568 if (d) { 569 memcpy(d, data, len); 570 return NO_ERROR; 571 } 572 return mError; 573 } 574 575 void* Parcel::writeInplace(size_t len) 576 { 577 const size_t padded = PAD_SIZE(len); 578 579 // sanity check for integer overflow 580 if (mDataPos+padded < mDataPos) { 581 return NULL; 582 } 583 584 if ((mDataPos+padded) <= mDataCapacity) { 585 restart_write: 586 //printf("Writing %ld bytes, padded to %ld\n", len, padded); 587 uint8_t* const data = mData+mDataPos; 588 589 // Need to pad at end? 590 if (padded != len) { 591 #if BYTE_ORDER == BIG_ENDIAN 592 static const uint32_t mask[4] = { 593 0x00000000, 0xffffff00, 0xffff0000, 0xff000000 594 }; 595 #endif 596 #if BYTE_ORDER == LITTLE_ENDIAN 597 static const uint32_t mask[4] = { 598 0x00000000, 0x00ffffff, 0x0000ffff, 0x000000ff 599 }; 600 #endif 601 //printf("Applying pad mask: %p to %p\n", (void*)mask[padded-len], 602 // *reinterpret_cast<void**>(data+padded-4)); 603 *reinterpret_cast<uint32_t*>(data+padded-4) &= mask[padded-len]; 604 } 605 606 finishWrite(padded); 607 return data; 608 } 609 610 status_t err = growData(padded); 611 if (err == NO_ERROR) goto restart_write; 612 return NULL; 613 } 614 615 status_t Parcel::writeInt32(int32_t val) 616 { 617 return writeAligned(val); 618 } 619 620 status_t Parcel::writeInt64(int64_t val) 621 { 622 return writeAligned(val); 623 } 624 625 status_t Parcel::writeFloat(float val) 626 { 627 return writeAligned(val); 628 } 629 630 status_t Parcel::writeDouble(double val) 631 { 632 return writeAligned(val); 633 } 634 635 status_t Parcel::writeIntPtr(intptr_t val) 636 { 637 return writeAligned(val); 638 } 639 640 status_t Parcel::writeCString(const char* str) 641 { 642 return write(str, strlen(str)+1); 643 } 644 645 status_t Parcel::writeString8(const String8& str) 646 { 647 status_t err = writeInt32(str.bytes()); 648 // only write string if its length is more than zero characters, 649 // as readString8 will only read if the length field is non-zero. 650 // this is slightly different from how writeString16 works. 651 if (str.bytes() > 0 && err == NO_ERROR) { 652 err = write(str.string(), str.bytes()+1); 653 } 654 return err; 655 } 656 657 status_t Parcel::writeString16(const String16& str) 658 { 659 return writeString16(str.string(), str.size()); 660 } 661 662 status_t Parcel::writeString16(const char16_t* str, size_t len) 663 { 664 if (str == NULL) return writeInt32(-1); 665 666 status_t err = writeInt32(len); 667 if (err == NO_ERROR) { 668 len *= sizeof(char16_t); 669 uint8_t* data = (uint8_t*)writeInplace(len+sizeof(char16_t)); 670 if (data) { 671 memcpy(data, str, len); 672 *reinterpret_cast<char16_t*>(data+len) = 0; 673 return NO_ERROR; 674 } 675 err = mError; 676 } 677 return err; 678 } 679 680 status_t Parcel::writeStrongBinder(const sp<IBinder>& val) 681 { 682 return flatten_binder(ProcessState::self(), val, this); 683 } 684 685 status_t Parcel::writeWeakBinder(const wp<IBinder>& val) 686 { 687 return flatten_binder(ProcessState::self(), val, this); 688 } 689 690 status_t Parcel::writeNativeHandle(const native_handle* handle) 691 { 692 if (!handle || handle->version != sizeof(native_handle)) 693 return BAD_TYPE; 694 695 status_t err; 696 err = writeInt32(handle->numFds); 697 if (err != NO_ERROR) return err; 698 699 err = writeInt32(handle->numInts); 700 if (err != NO_ERROR) return err; 701 702 for (int i=0 ; err==NO_ERROR && i<handle->numFds ; i++) 703 err = writeDupFileDescriptor(handle->data[i]); 704 705 if (err != NO_ERROR) { 706 LOGD("write native handle, write dup fd failed"); 707 return err; 708 } 709 err = write(handle->data + handle->numFds, sizeof(int)*handle->numInts); 710 return err; 711 } 712 713 status_t Parcel::writeFileDescriptor(int fd, bool takeOwnership) 714 { 715 flat_binder_object obj; 716 obj.type = BINDER_TYPE_FD; 717 obj.flags = 0x7f | FLAT_BINDER_FLAG_ACCEPTS_FDS; 718 obj.handle = fd; 719 obj.cookie = (void*) (takeOwnership ? 1 : 0); 720 return writeObject(obj, true); 721 } 722 723 status_t Parcel::writeDupFileDescriptor(int fd) 724 { 725 return writeFileDescriptor(dup(fd), true /*takeOwnership*/); 726 } 727 728 status_t Parcel::writeBlob(size_t len, WritableBlob* outBlob) 729 { 730 status_t status; 731 732 if (!mAllowFds || len <= IN_PLACE_BLOB_LIMIT) { 733 LOGV("writeBlob: write in place"); 734 status = writeInt32(0); 735 if (status) return status; 736 737 void* ptr = writeInplace(len); 738 if (!ptr) return NO_MEMORY; 739 740 outBlob->init(false /*mapped*/, ptr, len); 741 return NO_ERROR; 742 } 743 744 LOGV("writeBlob: write to ashmem"); 745 int fd = ashmem_create_region("Parcel Blob", len); 746 if (fd < 0) return NO_MEMORY; 747 748 int result = ashmem_set_prot_region(fd, PROT_READ | PROT_WRITE); 749 if (result < 0) { 750 status = result; 751 } else { 752 void* ptr = ::mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); 753 if (ptr == MAP_FAILED) { 754 status = -errno; 755 } else { 756 result = ashmem_set_prot_region(fd, PROT_READ); 757 if (result < 0) { 758 status = result; 759 } else { 760 status = writeInt32(1); 761 if (!status) { 762 status = writeFileDescriptor(fd, true /*takeOwnership*/); 763 if (!status) { 764 outBlob->init(true /*mapped*/, ptr, len); 765 return NO_ERROR; 766 } 767 } 768 } 769 } 770 ::munmap(ptr, len); 771 } 772 ::close(fd); 773 return status; 774 } 775 776 status_t Parcel::write(const Flattenable& val) 777 { 778 status_t err; 779 780 // size if needed 781 size_t len = val.getFlattenedSize(); 782 size_t fd_count = val.getFdCount(); 783 784 err = this->writeInt32(len); 785 if (err) return err; 786 787 err = this->writeInt32(fd_count); 788 if (err) return err; 789 790 // payload 791 void* buf = this->writeInplace(PAD_SIZE(len)); 792 if (buf == NULL) 793 return BAD_VALUE; 794 795 int* fds = NULL; 796 if (fd_count) { 797 fds = new int[fd_count]; 798 } 799 800 err = val.flatten(buf, len, fds, fd_count); 801 for (size_t i=0 ; i<fd_count && err==NO_ERROR ; i++) { 802 err = this->writeDupFileDescriptor( fds[i] ); 803 } 804 805 if (fd_count) { 806 delete [] fds; 807 } 808 809 return err; 810 } 811 812 status_t Parcel::writeObject(const flat_binder_object& val, bool nullMetaData) 813 { 814 const bool enoughData = (mDataPos+sizeof(val)) <= mDataCapacity; 815 const bool enoughObjects = mObjectsSize < mObjectsCapacity; 816 if (enoughData && enoughObjects) { 817 restart_write: 818 *reinterpret_cast<flat_binder_object*>(mData+mDataPos) = val; 819 820 // Need to write meta-data? 821 if (nullMetaData || val.binder != NULL) { 822 mObjects[mObjectsSize] = mDataPos; 823 acquire_object(ProcessState::self(), val, this); 824 mObjectsSize++; 825 } 826 827 // remember if it's a file descriptor 828 if (val.type == BINDER_TYPE_FD) { 829 if (!mAllowFds) { 830 return FDS_NOT_ALLOWED; 831 } 832 mHasFds = mFdsKnown = true; 833 } 834 835 return finishWrite(sizeof(flat_binder_object)); 836 } 837 838 if (!enoughData) { 839 const status_t err = growData(sizeof(val)); 840 if (err != NO_ERROR) return err; 841 } 842 if (!enoughObjects) { 843 size_t newSize = ((mObjectsSize+2)*3)/2; 844 size_t* objects = (size_t*)realloc(mObjects, newSize*sizeof(size_t)); 845 if (objects == NULL) return NO_MEMORY; 846 mObjects = objects; 847 mObjectsCapacity = newSize; 848 } 849 850 goto restart_write; 851 } 852 853 status_t Parcel::writeNoException() 854 { 855 return writeInt32(0); 856 } 857 858 void Parcel::remove(size_t start, size_t amt) 859 { 860 LOG_ALWAYS_FATAL("Parcel::remove() not yet implemented!"); 861 } 862 863 status_t Parcel::read(void* outData, size_t len) const 864 { 865 if ((mDataPos+PAD_SIZE(len)) >= mDataPos && (mDataPos+PAD_SIZE(len)) <= mDataSize) { 866 memcpy(outData, mData+mDataPos, len); 867 mDataPos += PAD_SIZE(len); 868 LOGV("read Setting data pos of %p to %d\n", this, mDataPos); 869 return NO_ERROR; 870 } 871 return NOT_ENOUGH_DATA; 872 } 873 874 const void* Parcel::readInplace(size_t len) const 875 { 876 if ((mDataPos+PAD_SIZE(len)) >= mDataPos && (mDataPos+PAD_SIZE(len)) <= mDataSize) { 877 const void* data = mData+mDataPos; 878 mDataPos += PAD_SIZE(len); 879 LOGV("readInplace Setting data pos of %p to %d\n", this, mDataPos); 880 return data; 881 } 882 return NULL; 883 } 884 885 template<class T> 886 status_t Parcel::readAligned(T *pArg) const { 887 COMPILE_TIME_ASSERT_FUNCTION_SCOPE(PAD_SIZE(sizeof(T)) == sizeof(T)); 888 889 if ((mDataPos+sizeof(T)) <= mDataSize) { 890 const void* data = mData+mDataPos; 891 mDataPos += sizeof(T); 892 *pArg = *reinterpret_cast<const T*>(data); 893 return NO_ERROR; 894 } else { 895 return NOT_ENOUGH_DATA; 896 } 897 } 898 899 template<class T> 900 T Parcel::readAligned() const { 901 T result; 902 if (readAligned(&result) != NO_ERROR) { 903 result = 0; 904 } 905 906 return result; 907 } 908 909 template<class T> 910 status_t Parcel::writeAligned(T val) { 911 COMPILE_TIME_ASSERT_FUNCTION_SCOPE(PAD_SIZE(sizeof(T)) == sizeof(T)); 912 913 if ((mDataPos+sizeof(val)) <= mDataCapacity) { 914 restart_write: 915 *reinterpret_cast<T*>(mData+mDataPos) = val; 916 return finishWrite(sizeof(val)); 917 } 918 919 status_t err = growData(sizeof(val)); 920 if (err == NO_ERROR) goto restart_write; 921 return err; 922 } 923 924 status_t Parcel::readInt32(int32_t *pArg) const 925 { 926 return readAligned(pArg); 927 } 928 929 int32_t Parcel::readInt32() const 930 { 931 return readAligned<int32_t>(); 932 } 933 934 935 status_t Parcel::readInt64(int64_t *pArg) const 936 { 937 return readAligned(pArg); 938 } 939 940 941 int64_t Parcel::readInt64() const 942 { 943 return readAligned<int64_t>(); 944 } 945 946 status_t Parcel::readFloat(float *pArg) const 947 { 948 return readAligned(pArg); 949 } 950 951 952 float Parcel::readFloat() const 953 { 954 return readAligned<float>(); 955 } 956 957 status_t Parcel::readDouble(double *pArg) const 958 { 959 return readAligned(pArg); 960 } 961 962 963 double Parcel::readDouble() const 964 { 965 return readAligned<double>(); 966 } 967 968 status_t Parcel::readIntPtr(intptr_t *pArg) const 969 { 970 return readAligned(pArg); 971 } 972 973 974 intptr_t Parcel::readIntPtr() const 975 { 976 return readAligned<intptr_t>(); 977 } 978 979 980 const char* Parcel::readCString() const 981 { 982 const size_t avail = mDataSize-mDataPos; 983 if (avail > 0) { 984 const char* str = reinterpret_cast<const char*>(mData+mDataPos); 985 // is the string's trailing NUL within the parcel's valid bounds? 986 const char* eos = reinterpret_cast<const char*>(memchr(str, 0, avail)); 987 if (eos) { 988 const size_t len = eos - str; 989 mDataPos += PAD_SIZE(len+1); 990 LOGV("readCString Setting data pos of %p to %d\n", this, mDataPos); 991 return str; 992 } 993 } 994 return NULL; 995 } 996 997 String8 Parcel::readString8() const 998 { 999 int32_t size = readInt32(); 1000 // watch for potential int overflow adding 1 for trailing NUL 1001 if (size > 0 && size < INT32_MAX) { 1002 const char* str = (const char*)readInplace(size+1); 1003 if (str) return String8(str, size); 1004 } 1005 return String8(); 1006 } 1007 1008 String16 Parcel::readString16() const 1009 { 1010 size_t len; 1011 const char16_t* str = readString16Inplace(&len); 1012 if (str) return String16(str, len); 1013 LOGE("Reading a NULL string not supported here."); 1014 return String16(); 1015 } 1016 1017 const char16_t* Parcel::readString16Inplace(size_t* outLen) const 1018 { 1019 int32_t size = readInt32(); 1020 // watch for potential int overflow from size+1 1021 if (size >= 0 && size < INT32_MAX) { 1022 *outLen = size; 1023 const char16_t* str = (const char16_t*)readInplace((size+1)*sizeof(char16_t)); 1024 if (str != NULL) { 1025 return str; 1026 } 1027 } 1028 *outLen = 0; 1029 return NULL; 1030 } 1031 1032 sp<IBinder> Parcel::readStrongBinder() const 1033 { 1034 sp<IBinder> val; 1035 unflatten_binder(ProcessState::self(), *this, &val); 1036 return val; 1037 } 1038 1039 wp<IBinder> Parcel::readWeakBinder() const 1040 { 1041 wp<IBinder> val; 1042 unflatten_binder(ProcessState::self(), *this, &val); 1043 return val; 1044 } 1045 1046 int32_t Parcel::readExceptionCode() const 1047 { 1048 int32_t exception_code = readAligned<int32_t>(); 1049 if (exception_code == EX_HAS_REPLY_HEADER) { 1050 int32_t header_size = readAligned<int32_t>(); 1051 // Skip over fat responses headers. Not used (or propagated) in 1052 // native code 1053 setDataPosition(dataPosition() + header_size); 1054 // And fat response headers are currently only used when there are no 1055 // exceptions, so return no error: 1056 return 0; 1057 } 1058 return exception_code; 1059 } 1060 1061 native_handle* Parcel::readNativeHandle() const 1062 { 1063 int numFds, numInts; 1064 status_t err; 1065 err = readInt32(&numFds); 1066 if (err != NO_ERROR) return 0; 1067 err = readInt32(&numInts); 1068 if (err != NO_ERROR) return 0; 1069 1070 native_handle* h = native_handle_create(numFds, numInts); 1071 for (int i=0 ; err==NO_ERROR && i<numFds ; i++) { 1072 h->data[i] = dup(readFileDescriptor()); 1073 if (h->data[i] < 0) err = BAD_VALUE; 1074 } 1075 err = read(h->data + numFds, sizeof(int)*numInts); 1076 if (err != NO_ERROR) { 1077 native_handle_close(h); 1078 native_handle_delete(h); 1079 h = 0; 1080 } 1081 return h; 1082 } 1083 1084 1085 int Parcel::readFileDescriptor() const 1086 { 1087 const flat_binder_object* flat = readObject(true); 1088 if (flat) { 1089 switch (flat->type) { 1090 case BINDER_TYPE_FD: 1091 //LOGI("Returning file descriptor %ld from parcel %p\n", flat->handle, this); 1092 return flat->handle; 1093 } 1094 } 1095 return BAD_TYPE; 1096 } 1097 1098 status_t Parcel::readBlob(size_t len, ReadableBlob* outBlob) const 1099 { 1100 int32_t useAshmem; 1101 status_t status = readInt32(&useAshmem); 1102 if (status) return status; 1103 1104 if (!useAshmem) { 1105 LOGV("readBlob: read in place"); 1106 const void* ptr = readInplace(len); 1107 if (!ptr) return BAD_VALUE; 1108 1109 outBlob->init(false /*mapped*/, const_cast<void*>(ptr), len); 1110 return NO_ERROR; 1111 } 1112 1113 LOGV("readBlob: read from ashmem"); 1114 int fd = readFileDescriptor(); 1115 if (fd == int(BAD_TYPE)) return BAD_VALUE; 1116 1117 void* ptr = ::mmap(NULL, len, PROT_READ, MAP_SHARED, fd, 0); 1118 if (!ptr) return NO_MEMORY; 1119 1120 outBlob->init(true /*mapped*/, ptr, len); 1121 return NO_ERROR; 1122 } 1123 1124 status_t Parcel::read(Flattenable& val) const 1125 { 1126 // size 1127 const size_t len = this->readInt32(); 1128 const size_t fd_count = this->readInt32(); 1129 1130 // payload 1131 void const* buf = this->readInplace(PAD_SIZE(len)); 1132 if (buf == NULL) 1133 return BAD_VALUE; 1134 1135 int* fds = NULL; 1136 if (fd_count) { 1137 fds = new int[fd_count]; 1138 } 1139 1140 status_t err = NO_ERROR; 1141 for (size_t i=0 ; i<fd_count && err==NO_ERROR ; i++) { 1142 fds[i] = dup(this->readFileDescriptor()); 1143 if (fds[i] < 0) err = BAD_VALUE; 1144 } 1145 1146 if (err == NO_ERROR) { 1147 err = val.unflatten(buf, len, fds, fd_count); 1148 } 1149 1150 if (fd_count) { 1151 delete [] fds; 1152 } 1153 1154 return err; 1155 } 1156 const flat_binder_object* Parcel::readObject(bool nullMetaData) const 1157 { 1158 const size_t DPOS = mDataPos; 1159 if ((DPOS+sizeof(flat_binder_object)) <= mDataSize) { 1160 const flat_binder_object* obj 1161 = reinterpret_cast<const flat_binder_object*>(mData+DPOS); 1162 mDataPos = DPOS + sizeof(flat_binder_object); 1163 if (!nullMetaData && (obj->cookie == NULL && obj->binder == NULL)) { 1164 // When transferring a NULL object, we don't write it into 1165 // the object list, so we don't want to check for it when 1166 // reading. 1167 LOGV("readObject Setting data pos of %p to %d\n", this, mDataPos); 1168 return obj; 1169 } 1170 1171 // Ensure that this object is valid... 1172 size_t* const OBJS = mObjects; 1173 const size_t N = mObjectsSize; 1174 size_t opos = mNextObjectHint; 1175 1176 if (N > 0) { 1177 LOGV("Parcel %p looking for obj at %d, hint=%d\n", 1178 this, DPOS, opos); 1179 1180 // Start at the current hint position, looking for an object at 1181 // the current data position. 1182 if (opos < N) { 1183 while (opos < (N-1) && OBJS[opos] < DPOS) { 1184 opos++; 1185 } 1186 } else { 1187 opos = N-1; 1188 } 1189 if (OBJS[opos] == DPOS) { 1190 // Found it! 1191 LOGV("Parcel found obj %d at index %d with forward search", 1192 this, DPOS, opos); 1193 mNextObjectHint = opos+1; 1194 LOGV("readObject Setting data pos of %p to %d\n", this, mDataPos); 1195 return obj; 1196 } 1197 1198 // Look backwards for it... 1199 while (opos > 0 && OBJS[opos] > DPOS) { 1200 opos--; 1201 } 1202 if (OBJS[opos] == DPOS) { 1203 // Found it! 1204 LOGV("Parcel found obj %d at index %d with backward search", 1205 this, DPOS, opos); 1206 mNextObjectHint = opos+1; 1207 LOGV("readObject Setting data pos of %p to %d\n", this, mDataPos); 1208 return obj; 1209 } 1210 } 1211 LOGW("Attempt to read object from Parcel %p at offset %d that is not in the object list", 1212 this, DPOS); 1213 } 1214 return NULL; 1215 } 1216 1217 void Parcel::closeFileDescriptors() 1218 { 1219 size_t i = mObjectsSize; 1220 if (i > 0) { 1221 //LOGI("Closing file descriptors for %d objects...", mObjectsSize); 1222 } 1223 while (i > 0) { 1224 i--; 1225 const flat_binder_object* flat 1226 = reinterpret_cast<flat_binder_object*>(mData+mObjects[i]); 1227 if (flat->type == BINDER_TYPE_FD) { 1228 //LOGI("Closing fd: %ld\n", flat->handle); 1229 close(flat->handle); 1230 } 1231 } 1232 } 1233 1234 const uint8_t* Parcel::ipcData() const 1235 { 1236 return mData; 1237 } 1238 1239 size_t Parcel::ipcDataSize() const 1240 { 1241 return (mDataSize > mDataPos ? mDataSize : mDataPos); 1242 } 1243 1244 const size_t* Parcel::ipcObjects() const 1245 { 1246 return mObjects; 1247 } 1248 1249 size_t Parcel::ipcObjectsCount() const 1250 { 1251 return mObjectsSize; 1252 } 1253 1254 void Parcel::ipcSetDataReference(const uint8_t* data, size_t dataSize, 1255 const size_t* objects, size_t objectsCount, release_func relFunc, void* relCookie) 1256 { 1257 freeDataNoInit(); 1258 mError = NO_ERROR; 1259 mData = const_cast<uint8_t*>(data); 1260 mDataSize = mDataCapacity = dataSize; 1261 //LOGI("setDataReference Setting data size of %p to %lu (pid=%d)\n", this, mDataSize, getpid()); 1262 mDataPos = 0; 1263 LOGV("setDataReference Setting data pos of %p to %d\n", this, mDataPos); 1264 mObjects = const_cast<size_t*>(objects); 1265 mObjectsSize = mObjectsCapacity = objectsCount; 1266 mNextObjectHint = 0; 1267 mOwner = relFunc; 1268 mOwnerCookie = relCookie; 1269 scanForFds(); 1270 } 1271 1272 void Parcel::print(TextOutput& to, uint32_t flags) const 1273 { 1274 to << "Parcel("; 1275 1276 if (errorCheck() != NO_ERROR) { 1277 const status_t err = errorCheck(); 1278 to << "Error: " << (void*)err << " \"" << strerror(-err) << "\""; 1279 } else if (dataSize() > 0) { 1280 const uint8_t* DATA = data(); 1281 to << indent << HexDump(DATA, dataSize()) << dedent; 1282 const size_t* OBJS = objects(); 1283 const size_t N = objectsCount(); 1284 for (size_t i=0; i<N; i++) { 1285 const flat_binder_object* flat 1286 = reinterpret_cast<const flat_binder_object*>(DATA+OBJS[i]); 1287 to << endl << "Object #" << i << " @ " << (void*)OBJS[i] << ": " 1288 << TypeCode(flat->type & 0x7f7f7f00) 1289 << " = " << flat->binder; 1290 } 1291 } else { 1292 to << "NULL"; 1293 } 1294 1295 to << ")"; 1296 } 1297 1298 void Parcel::releaseObjects() 1299 { 1300 const sp<ProcessState> proc(ProcessState::self()); 1301 size_t i = mObjectsSize; 1302 uint8_t* const data = mData; 1303 size_t* const objects = mObjects; 1304 while (i > 0) { 1305 i--; 1306 const flat_binder_object* flat 1307 = reinterpret_cast<flat_binder_object*>(data+objects[i]); 1308 release_object(proc, *flat, this); 1309 } 1310 } 1311 1312 void Parcel::acquireObjects() 1313 { 1314 const sp<ProcessState> proc(ProcessState::self()); 1315 size_t i = mObjectsSize; 1316 uint8_t* const data = mData; 1317 size_t* const objects = mObjects; 1318 while (i > 0) { 1319 i--; 1320 const flat_binder_object* flat 1321 = reinterpret_cast<flat_binder_object*>(data+objects[i]); 1322 acquire_object(proc, *flat, this); 1323 } 1324 } 1325 1326 void Parcel::freeData() 1327 { 1328 freeDataNoInit(); 1329 initState(); 1330 } 1331 1332 void Parcel::freeDataNoInit() 1333 { 1334 if (mOwner) { 1335 //LOGI("Freeing data ref of %p (pid=%d)\n", this, getpid()); 1336 mOwner(this, mData, mDataSize, mObjects, mObjectsSize, mOwnerCookie); 1337 } else { 1338 releaseObjects(); 1339 if (mData) free(mData); 1340 if (mObjects) free(mObjects); 1341 } 1342 } 1343 1344 status_t Parcel::growData(size_t len) 1345 { 1346 size_t newSize = ((mDataSize+len)*3)/2; 1347 return (newSize <= mDataSize) 1348 ? (status_t) NO_MEMORY 1349 : continueWrite(newSize); 1350 } 1351 1352 status_t Parcel::restartWrite(size_t desired) 1353 { 1354 if (mOwner) { 1355 freeData(); 1356 return continueWrite(desired); 1357 } 1358 1359 uint8_t* data = (uint8_t*)realloc(mData, desired); 1360 if (!data && desired > mDataCapacity) { 1361 mError = NO_MEMORY; 1362 return NO_MEMORY; 1363 } 1364 1365 releaseObjects(); 1366 1367 if (data) { 1368 mData = data; 1369 mDataCapacity = desired; 1370 } 1371 1372 mDataSize = mDataPos = 0; 1373 LOGV("restartWrite Setting data size of %p to %d\n", this, mDataSize); 1374 LOGV("restartWrite Setting data pos of %p to %d\n", this, mDataPos); 1375 1376 free(mObjects); 1377 mObjects = NULL; 1378 mObjectsSize = mObjectsCapacity = 0; 1379 mNextObjectHint = 0; 1380 mHasFds = false; 1381 mFdsKnown = true; 1382 mAllowFds = true; 1383 1384 return NO_ERROR; 1385 } 1386 1387 status_t Parcel::continueWrite(size_t desired) 1388 { 1389 // If shrinking, first adjust for any objects that appear 1390 // after the new data size. 1391 size_t objectsSize = mObjectsSize; 1392 if (desired < mDataSize) { 1393 if (desired == 0) { 1394 objectsSize = 0; 1395 } else { 1396 while (objectsSize > 0) { 1397 if (mObjects[objectsSize-1] < desired) 1398 break; 1399 objectsSize--; 1400 } 1401 } 1402 } 1403 1404 if (mOwner) { 1405 // If the size is going to zero, just release the owner's data. 1406 if (desired == 0) { 1407 freeData(); 1408 return NO_ERROR; 1409 } 1410 1411 // If there is a different owner, we need to take 1412 // posession. 1413 uint8_t* data = (uint8_t*)malloc(desired); 1414 if (!data) { 1415 mError = NO_MEMORY; 1416 return NO_MEMORY; 1417 } 1418 size_t* objects = NULL; 1419 1420 if (objectsSize) { 1421 objects = (size_t*)malloc(objectsSize*sizeof(size_t)); 1422 if (!objects) { 1423 mError = NO_MEMORY; 1424 return NO_MEMORY; 1425 } 1426 1427 // Little hack to only acquire references on objects 1428 // we will be keeping. 1429 size_t oldObjectsSize = mObjectsSize; 1430 mObjectsSize = objectsSize; 1431 acquireObjects(); 1432 mObjectsSize = oldObjectsSize; 1433 } 1434 1435 if (mData) { 1436 memcpy(data, mData, mDataSize < desired ? mDataSize : desired); 1437 } 1438 if (objects && mObjects) { 1439 memcpy(objects, mObjects, objectsSize*sizeof(size_t)); 1440 } 1441 //LOGI("Freeing data ref of %p (pid=%d)\n", this, getpid()); 1442 mOwner(this, mData, mDataSize, mObjects, mObjectsSize, mOwnerCookie); 1443 mOwner = NULL; 1444 1445 mData = data; 1446 mObjects = objects; 1447 mDataSize = (mDataSize < desired) ? mDataSize : desired; 1448 LOGV("continueWrite Setting data size of %p to %d\n", this, mDataSize); 1449 mDataCapacity = desired; 1450 mObjectsSize = mObjectsCapacity = objectsSize; 1451 mNextObjectHint = 0; 1452 1453 } else if (mData) { 1454 if (objectsSize < mObjectsSize) { 1455 // Need to release refs on any objects we are dropping. 1456 const sp<ProcessState> proc(ProcessState::self()); 1457 for (size_t i=objectsSize; i<mObjectsSize; i++) { 1458 const flat_binder_object* flat 1459 = reinterpret_cast<flat_binder_object*>(mData+mObjects[i]); 1460 if (flat->type == BINDER_TYPE_FD) { 1461 // will need to rescan because we may have lopped off the only FDs 1462 mFdsKnown = false; 1463 } 1464 release_object(proc, *flat, this); 1465 } 1466 size_t* objects = 1467 (size_t*)realloc(mObjects, objectsSize*sizeof(size_t)); 1468 if (objects) { 1469 mObjects = objects; 1470 } 1471 mObjectsSize = objectsSize; 1472 mNextObjectHint = 0; 1473 } 1474 1475 // We own the data, so we can just do a realloc(). 1476 if (desired > mDataCapacity) { 1477 uint8_t* data = (uint8_t*)realloc(mData, desired); 1478 if (data) { 1479 mData = data; 1480 mDataCapacity = desired; 1481 } else if (desired > mDataCapacity) { 1482 mError = NO_MEMORY; 1483 return NO_MEMORY; 1484 } 1485 } else { 1486 if (mDataSize > desired) { 1487 mDataSize = desired; 1488 LOGV("continueWrite Setting data size of %p to %d\n", this, mDataSize); 1489 } 1490 if (mDataPos > desired) { 1491 mDataPos = desired; 1492 LOGV("continueWrite Setting data pos of %p to %d\n", this, mDataPos); 1493 } 1494 } 1495 1496 } else { 1497 // This is the first data. Easy! 1498 uint8_t* data = (uint8_t*)malloc(desired); 1499 if (!data) { 1500 mError = NO_MEMORY; 1501 return NO_MEMORY; 1502 } 1503 1504 if(!(mDataCapacity == 0 && mObjects == NULL 1505 && mObjectsCapacity == 0)) { 1506 LOGE("continueWrite: %d/%p/%d/%d", mDataCapacity, mObjects, mObjectsCapacity, desired); 1507 } 1508 1509 mData = data; 1510 mDataSize = mDataPos = 0; 1511 LOGV("continueWrite Setting data size of %p to %d\n", this, mDataSize); 1512 LOGV("continueWrite Setting data pos of %p to %d\n", this, mDataPos); 1513 mDataCapacity = desired; 1514 } 1515 1516 return NO_ERROR; 1517 } 1518 1519 void Parcel::initState() 1520 { 1521 mError = NO_ERROR; 1522 mData = 0; 1523 mDataSize = 0; 1524 mDataCapacity = 0; 1525 mDataPos = 0; 1526 LOGV("initState Setting data size of %p to %d\n", this, mDataSize); 1527 LOGV("initState Setting data pos of %p to %d\n", this, mDataPos); 1528 mObjects = NULL; 1529 mObjectsSize = 0; 1530 mObjectsCapacity = 0; 1531 mNextObjectHint = 0; 1532 mHasFds = false; 1533 mFdsKnown = true; 1534 mAllowFds = true; 1535 mOwner = NULL; 1536 } 1537 1538 void Parcel::scanForFds() const 1539 { 1540 bool hasFds = false; 1541 for (size_t i=0; i<mObjectsSize; i++) { 1542 const flat_binder_object* flat 1543 = reinterpret_cast<const flat_binder_object*>(mData + mObjects[i]); 1544 if (flat->type == BINDER_TYPE_FD) { 1545 hasFds = true; 1546 break; 1547 } 1548 } 1549 mHasFds = hasFds; 1550 mFdsKnown = true; 1551 } 1552 1553 // --- Parcel::Blob --- 1554 1555 Parcel::Blob::Blob() : 1556 mMapped(false), mData(NULL), mSize(0) { 1557 } 1558 1559 Parcel::Blob::~Blob() { 1560 release(); 1561 } 1562 1563 void Parcel::Blob::release() { 1564 if (mMapped && mData) { 1565 ::munmap(mData, mSize); 1566 } 1567 clear(); 1568 } 1569 1570 void Parcel::Blob::init(bool mapped, void* data, size_t size) { 1571 mMapped = mapped; 1572 mData = data; 1573 mSize = size; 1574 } 1575 1576 void Parcel::Blob::clear() { 1577 mMapped = false; 1578 mData = NULL; 1579 mSize = 0; 1580 } 1581 1582 }; // namespace android 1583
