Parcel.cpp revision 5707dbf15d0b44c88fbaa6dd271097f2d42932e0
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. 60static 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. 64struct small_flat_data 65{ 66 uint32_t type; 67 uint32_t data; 68}; 69 70namespace android { 71 72void 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 109void 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 145inline 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 151status_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 182status_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 230inline static status_t finish_unflatten_binder( 231 BpBinder* proxy, const flat_binder_object& flat, const Parcel& in) 232{ 233 return NO_ERROR; 234} 235 236status_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 255status_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 286Parcel::Parcel() 287{ 288 initState(); 289} 290 291Parcel::~Parcel() 292{ 293 freeDataNoInit(); 294} 295 296const uint8_t* Parcel::data() const 297{ 298 return mData; 299} 300 301size_t Parcel::dataSize() const 302{ 303 return (mDataSize > mDataPos ? mDataSize : mDataPos); 304} 305 306size_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 317size_t Parcel::dataPosition() const 318{ 319 return mDataPos; 320} 321 322size_t Parcel::dataCapacity() const 323{ 324 return mDataCapacity; 325} 326 327status_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 338void Parcel::setDataPosition(size_t pos) const 339{ 340 mDataPos = pos; 341 mNextObjectHint = 0; 342} 343 344status_t Parcel::setDataCapacity(size_t size) 345{ 346 if (size > mDataCapacity) return continueWrite(size); 347 return NO_ERROR; 348} 349 350status_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 361status_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 450bool Parcel::setAllowFds(bool allowFds) 451{ 452 const bool origValue = mAllowFds; 453 mAllowFds = allowFds; 454 return origValue; 455} 456 457bool Parcel::hasFileDescriptors() const 458{ 459 if (!mFdsKnown) { 460 scanForFds(); 461 } 462 return mHasFds; 463} 464 465// Write RPC headers. (previously just the interface token) 466status_t Parcel::writeInterfaceToken(const String16& interface) 467{ 468 writeInt32(IPCThreadState::self()->getStrictModePolicy() | 469 STRICT_MODE_PENALTY_GATHER); 470 // currently the interface identification token is just its name as a string 471 return writeString16(interface); 472} 473 474bool Parcel::checkInterface(IBinder* binder) const 475{ 476 return enforceInterface(binder->getInterfaceDescriptor()); 477} 478 479bool Parcel::enforceInterface(const String16& interface, 480 IPCThreadState* threadState) const 481{ 482 int32_t strictPolicy = readInt32(); 483 if (threadState == NULL) { 484 threadState = IPCThreadState::self(); 485 } 486 if ((threadState->getLastTransactionBinderFlags() & 487 IBinder::FLAG_ONEWAY) != 0) { 488 // For one-way calls, the callee is running entirely 489 // disconnected from the caller, so disable StrictMode entirely. 490 // Not only does disk/network usage not impact the caller, but 491 // there's no way to commuicate back any violations anyway. 492 threadState->setStrictModePolicy(0); 493 } else { 494 threadState->setStrictModePolicy(strictPolicy); 495 } 496 const String16 str(readString16()); 497 if (str == interface) { 498 return true; 499 } else { 500 LOGW("**** enforceInterface() expected '%s' but read '%s'\n", 501 String8(interface).string(), String8(str).string()); 502 return false; 503 } 504} 505 506const size_t* Parcel::objects() const 507{ 508 return mObjects; 509} 510 511size_t Parcel::objectsCount() const 512{ 513 return mObjectsSize; 514} 515 516status_t Parcel::errorCheck() const 517{ 518 return mError; 519} 520 521void Parcel::setError(status_t err) 522{ 523 mError = err; 524} 525 526status_t Parcel::finishWrite(size_t len) 527{ 528 //printf("Finish write of %d\n", len); 529 mDataPos += len; 530 LOGV("finishWrite Setting data pos of %p to %d\n", this, mDataPos); 531 if (mDataPos > mDataSize) { 532 mDataSize = mDataPos; 533 LOGV("finishWrite Setting data size of %p to %d\n", this, mDataSize); 534 } 535 //printf("New pos=%d, size=%d\n", mDataPos, mDataSize); 536 return NO_ERROR; 537} 538 539status_t Parcel::writeUnpadded(const void* data, size_t len) 540{ 541 size_t end = mDataPos + len; 542 if (end < mDataPos) { 543 // integer overflow 544 return BAD_VALUE; 545 } 546 547 if (end <= mDataCapacity) { 548restart_write: 549 memcpy(mData+mDataPos, data, len); 550 return finishWrite(len); 551 } 552 553 status_t err = growData(len); 554 if (err == NO_ERROR) goto restart_write; 555 return err; 556} 557 558status_t Parcel::write(const void* data, size_t len) 559{ 560 void* const d = writeInplace(len); 561 if (d) { 562 memcpy(d, data, len); 563 return NO_ERROR; 564 } 565 return mError; 566} 567 568void* Parcel::writeInplace(size_t len) 569{ 570 const size_t padded = PAD_SIZE(len); 571 572 // sanity check for integer overflow 573 if (mDataPos+padded < mDataPos) { 574 return NULL; 575 } 576 577 if ((mDataPos+padded) <= mDataCapacity) { 578restart_write: 579 //printf("Writing %ld bytes, padded to %ld\n", len, padded); 580 uint8_t* const data = mData+mDataPos; 581 582 // Need to pad at end? 583 if (padded != len) { 584#if BYTE_ORDER == BIG_ENDIAN 585 static const uint32_t mask[4] = { 586 0x00000000, 0xffffff00, 0xffff0000, 0xff000000 587 }; 588#endif 589#if BYTE_ORDER == LITTLE_ENDIAN 590 static const uint32_t mask[4] = { 591 0x00000000, 0x00ffffff, 0x0000ffff, 0x000000ff 592 }; 593#endif 594 //printf("Applying pad mask: %p to %p\n", (void*)mask[padded-len], 595 // *reinterpret_cast<void**>(data+padded-4)); 596 *reinterpret_cast<uint32_t*>(data+padded-4) &= mask[padded-len]; 597 } 598 599 finishWrite(padded); 600 return data; 601 } 602 603 status_t err = growData(padded); 604 if (err == NO_ERROR) goto restart_write; 605 return NULL; 606} 607 608status_t Parcel::writeInt32(int32_t val) 609{ 610 return writeAligned(val); 611} 612 613status_t Parcel::writeInt64(int64_t val) 614{ 615 return writeAligned(val); 616} 617 618status_t Parcel::writeFloat(float val) 619{ 620 return writeAligned(val); 621} 622 623status_t Parcel::writeDouble(double val) 624{ 625 return writeAligned(val); 626} 627 628status_t Parcel::writeIntPtr(intptr_t val) 629{ 630 return writeAligned(val); 631} 632 633status_t Parcel::writeCString(const char* str) 634{ 635 return write(str, strlen(str)+1); 636} 637 638status_t Parcel::writeString8(const String8& str) 639{ 640 status_t err = writeInt32(str.bytes()); 641 // only write string if its length is more than zero characters, 642 // as readString8 will only read if the length field is non-zero. 643 // this is slightly different from how writeString16 works. 644 if (str.bytes() > 0 && err == NO_ERROR) { 645 err = write(str.string(), str.bytes()+1); 646 } 647 return err; 648} 649 650status_t Parcel::writeString16(const String16& str) 651{ 652 return writeString16(str.string(), str.size()); 653} 654 655status_t Parcel::writeString16(const char16_t* str, size_t len) 656{ 657 if (str == NULL) return writeInt32(-1); 658 659 status_t err = writeInt32(len); 660 if (err == NO_ERROR) { 661 len *= sizeof(char16_t); 662 uint8_t* data = (uint8_t*)writeInplace(len+sizeof(char16_t)); 663 if (data) { 664 memcpy(data, str, len); 665 *reinterpret_cast<char16_t*>(data+len) = 0; 666 return NO_ERROR; 667 } 668 err = mError; 669 } 670 return err; 671} 672 673status_t Parcel::writeStrongBinder(const sp<IBinder>& val) 674{ 675 return flatten_binder(ProcessState::self(), val, this); 676} 677 678status_t Parcel::writeWeakBinder(const wp<IBinder>& val) 679{ 680 return flatten_binder(ProcessState::self(), val, this); 681} 682 683status_t Parcel::writeNativeHandle(const native_handle* handle) 684{ 685 if (!handle || handle->version != sizeof(native_handle)) 686 return BAD_TYPE; 687 688 status_t err; 689 err = writeInt32(handle->numFds); 690 if (err != NO_ERROR) return err; 691 692 err = writeInt32(handle->numInts); 693 if (err != NO_ERROR) return err; 694 695 for (int i=0 ; err==NO_ERROR && i<handle->numFds ; i++) 696 err = writeDupFileDescriptor(handle->data[i]); 697 698 if (err != NO_ERROR) { 699 LOGD("write native handle, write dup fd failed"); 700 return err; 701 } 702 err = write(handle->data + handle->numFds, sizeof(int)*handle->numInts); 703 return err; 704} 705 706status_t Parcel::writeFileDescriptor(int fd) 707{ 708 flat_binder_object obj; 709 obj.type = BINDER_TYPE_FD; 710 obj.flags = 0x7f | FLAT_BINDER_FLAG_ACCEPTS_FDS; 711 obj.handle = fd; 712 obj.cookie = (void*)0; 713 return writeObject(obj, true); 714} 715 716status_t Parcel::writeDupFileDescriptor(int fd) 717{ 718 flat_binder_object obj; 719 obj.type = BINDER_TYPE_FD; 720 obj.flags = 0x7f | FLAT_BINDER_FLAG_ACCEPTS_FDS; 721 obj.handle = dup(fd); 722 obj.cookie = (void*)1; 723 return writeObject(obj, true); 724} 725 726status_t Parcel::writeBlob(size_t len, WritableBlob* outBlob) 727{ 728 status_t status; 729 730 if (!mAllowFds || len <= IN_PLACE_BLOB_LIMIT) { 731 LOGV("writeBlob: write in place"); 732 status = writeInt32(0); 733 if (status) return status; 734 735 void* ptr = writeInplace(len); 736 if (!ptr) return NO_MEMORY; 737 738 outBlob->init(false /*mapped*/, ptr, len); 739 return NO_ERROR; 740 } 741 742 LOGV("writeBlob: write to ashmem"); 743 int fd = ashmem_create_region("Parcel Blob", len); 744 if (fd < 0) return NO_MEMORY; 745 746 int result = ashmem_set_prot_region(fd, PROT_READ | PROT_WRITE); 747 if (result < 0) { 748 status = -result; 749 } else { 750 void* ptr = ::mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); 751 if (ptr == MAP_FAILED) { 752 status = -errno; 753 } else { 754 result = ashmem_set_prot_region(fd, PROT_READ); 755 if (result < 0) { 756 status = -result; 757 } else { 758 status = writeInt32(1); 759 if (!status) { 760 status = writeFileDescriptor(fd); 761 if (!status) { 762 outBlob->init(true /*mapped*/, ptr, len); 763 return NO_ERROR; 764 } 765 } 766 } 767 } 768 ::munmap(ptr, len); 769 } 770 ::close(fd); 771 return status; 772} 773 774status_t Parcel::write(const Flattenable& val) 775{ 776 status_t err; 777 778 // size if needed 779 size_t len = val.getFlattenedSize(); 780 size_t fd_count = val.getFdCount(); 781 782 err = this->writeInt32(len); 783 if (err) return err; 784 785 err = this->writeInt32(fd_count); 786 if (err) return err; 787 788 // payload 789 void* buf = this->writeInplace(PAD_SIZE(len)); 790 if (buf == NULL) 791 return BAD_VALUE; 792 793 int* fds = NULL; 794 if (fd_count) { 795 fds = new int[fd_count]; 796 } 797 798 err = val.flatten(buf, len, fds, fd_count); 799 for (size_t i=0 ; i<fd_count && err==NO_ERROR ; i++) { 800 err = this->writeDupFileDescriptor( fds[i] ); 801 } 802 803 if (fd_count) { 804 delete [] fds; 805 } 806 807 return err; 808} 809 810status_t Parcel::writeObject(const flat_binder_object& val, bool nullMetaData) 811{ 812 const bool enoughData = (mDataPos+sizeof(val)) <= mDataCapacity; 813 const bool enoughObjects = mObjectsSize < mObjectsCapacity; 814 if (enoughData && enoughObjects) { 815restart_write: 816 *reinterpret_cast<flat_binder_object*>(mData+mDataPos) = val; 817 818 // Need to write meta-data? 819 if (nullMetaData || val.binder != NULL) { 820 mObjects[mObjectsSize] = mDataPos; 821 acquire_object(ProcessState::self(), val, this); 822 mObjectsSize++; 823 } 824 825 // remember if it's a file descriptor 826 if (val.type == BINDER_TYPE_FD) { 827 if (!mAllowFds) { 828 return FDS_NOT_ALLOWED; 829 } 830 mHasFds = mFdsKnown = true; 831 } 832 833 return finishWrite(sizeof(flat_binder_object)); 834 } 835 836 if (!enoughData) { 837 const status_t err = growData(sizeof(val)); 838 if (err != NO_ERROR) return err; 839 } 840 if (!enoughObjects) { 841 size_t newSize = ((mObjectsSize+2)*3)/2; 842 size_t* objects = (size_t*)realloc(mObjects, newSize*sizeof(size_t)); 843 if (objects == NULL) return NO_MEMORY; 844 mObjects = objects; 845 mObjectsCapacity = newSize; 846 } 847 848 goto restart_write; 849} 850 851status_t Parcel::writeNoException() 852{ 853 return writeInt32(0); 854} 855 856void Parcel::remove(size_t start, size_t amt) 857{ 858 LOG_ALWAYS_FATAL("Parcel::remove() not yet implemented!"); 859} 860 861status_t Parcel::read(void* outData, size_t len) const 862{ 863 if ((mDataPos+PAD_SIZE(len)) >= mDataPos && (mDataPos+PAD_SIZE(len)) <= mDataSize) { 864 memcpy(outData, mData+mDataPos, len); 865 mDataPos += PAD_SIZE(len); 866 LOGV("read Setting data pos of %p to %d\n", this, mDataPos); 867 return NO_ERROR; 868 } 869 return NOT_ENOUGH_DATA; 870} 871 872const void* Parcel::readInplace(size_t len) const 873{ 874 if ((mDataPos+PAD_SIZE(len)) >= mDataPos && (mDataPos+PAD_SIZE(len)) <= mDataSize) { 875 const void* data = mData+mDataPos; 876 mDataPos += PAD_SIZE(len); 877 LOGV("readInplace Setting data pos of %p to %d\n", this, mDataPos); 878 return data; 879 } 880 return NULL; 881} 882 883template<class T> 884status_t Parcel::readAligned(T *pArg) const { 885 COMPILE_TIME_ASSERT_FUNCTION_SCOPE(PAD_SIZE(sizeof(T)) == sizeof(T)); 886 887 if ((mDataPos+sizeof(T)) <= mDataSize) { 888 const void* data = mData+mDataPos; 889 mDataPos += sizeof(T); 890 *pArg = *reinterpret_cast<const T*>(data); 891 return NO_ERROR; 892 } else { 893 return NOT_ENOUGH_DATA; 894 } 895} 896 897template<class T> 898T Parcel::readAligned() const { 899 T result; 900 if (readAligned(&result) != NO_ERROR) { 901 result = 0; 902 } 903 904 return result; 905} 906 907template<class T> 908status_t Parcel::writeAligned(T val) { 909 COMPILE_TIME_ASSERT_FUNCTION_SCOPE(PAD_SIZE(sizeof(T)) == sizeof(T)); 910 911 if ((mDataPos+sizeof(val)) <= mDataCapacity) { 912restart_write: 913 *reinterpret_cast<T*>(mData+mDataPos) = val; 914 return finishWrite(sizeof(val)); 915 } 916 917 status_t err = growData(sizeof(val)); 918 if (err == NO_ERROR) goto restart_write; 919 return err; 920} 921 922status_t Parcel::readInt32(int32_t *pArg) const 923{ 924 return readAligned(pArg); 925} 926 927int32_t Parcel::readInt32() const 928{ 929 return readAligned<int32_t>(); 930} 931 932 933status_t Parcel::readInt64(int64_t *pArg) const 934{ 935 return readAligned(pArg); 936} 937 938 939int64_t Parcel::readInt64() const 940{ 941 return readAligned<int64_t>(); 942} 943 944status_t Parcel::readFloat(float *pArg) const 945{ 946 return readAligned(pArg); 947} 948 949 950float Parcel::readFloat() const 951{ 952 return readAligned<float>(); 953} 954 955status_t Parcel::readDouble(double *pArg) const 956{ 957 return readAligned(pArg); 958} 959 960 961double Parcel::readDouble() const 962{ 963 return readAligned<double>(); 964} 965 966status_t Parcel::readIntPtr(intptr_t *pArg) const 967{ 968 return readAligned(pArg); 969} 970 971 972intptr_t Parcel::readIntPtr() const 973{ 974 return readAligned<intptr_t>(); 975} 976 977 978const char* Parcel::readCString() const 979{ 980 const size_t avail = mDataSize-mDataPos; 981 if (avail > 0) { 982 const char* str = reinterpret_cast<const char*>(mData+mDataPos); 983 // is the string's trailing NUL within the parcel's valid bounds? 984 const char* eos = reinterpret_cast<const char*>(memchr(str, 0, avail)); 985 if (eos) { 986 const size_t len = eos - str; 987 mDataPos += PAD_SIZE(len+1); 988 LOGV("readCString Setting data pos of %p to %d\n", this, mDataPos); 989 return str; 990 } 991 } 992 return NULL; 993} 994 995String8 Parcel::readString8() const 996{ 997 int32_t size = readInt32(); 998 // watch for potential int overflow adding 1 for trailing NUL 999 if (size > 0 && size < INT32_MAX) { 1000 const char* str = (const char*)readInplace(size+1); 1001 if (str) return String8(str, size); 1002 } 1003 return String8(); 1004} 1005 1006String16 Parcel::readString16() const 1007{ 1008 size_t len; 1009 const char16_t* str = readString16Inplace(&len); 1010 if (str) return String16(str, len); 1011 LOGE("Reading a NULL string not supported here."); 1012 return String16(); 1013} 1014 1015const char16_t* Parcel::readString16Inplace(size_t* outLen) const 1016{ 1017 int32_t size = readInt32(); 1018 // watch for potential int overflow from size+1 1019 if (size >= 0 && size < INT32_MAX) { 1020 *outLen = size; 1021 const char16_t* str = (const char16_t*)readInplace((size+1)*sizeof(char16_t)); 1022 if (str != NULL) { 1023 return str; 1024 } 1025 } 1026 *outLen = 0; 1027 return NULL; 1028} 1029 1030sp<IBinder> Parcel::readStrongBinder() const 1031{ 1032 sp<IBinder> val; 1033 unflatten_binder(ProcessState::self(), *this, &val); 1034 return val; 1035} 1036 1037wp<IBinder> Parcel::readWeakBinder() const 1038{ 1039 wp<IBinder> val; 1040 unflatten_binder(ProcessState::self(), *this, &val); 1041 return val; 1042} 1043 1044int32_t Parcel::readExceptionCode() const 1045{ 1046 int32_t exception_code = readAligned<int32_t>(); 1047 if (exception_code == EX_HAS_REPLY_HEADER) { 1048 int32_t header_size = readAligned<int32_t>(); 1049 // Skip over fat responses headers. Not used (or propagated) in 1050 // native code 1051 setDataPosition(dataPosition() + header_size); 1052 // And fat response headers are currently only used when there are no 1053 // exceptions, so return no error: 1054 return 0; 1055 } 1056 return exception_code; 1057} 1058 1059native_handle* Parcel::readNativeHandle() const 1060{ 1061 int numFds, numInts; 1062 status_t err; 1063 err = readInt32(&numFds); 1064 if (err != NO_ERROR) return 0; 1065 err = readInt32(&numInts); 1066 if (err != NO_ERROR) return 0; 1067 1068 native_handle* h = native_handle_create(numFds, numInts); 1069 for (int i=0 ; err==NO_ERROR && i<numFds ; i++) { 1070 h->data[i] = dup(readFileDescriptor()); 1071 if (h->data[i] < 0) err = BAD_VALUE; 1072 } 1073 err = read(h->data + numFds, sizeof(int)*numInts); 1074 if (err != NO_ERROR) { 1075 native_handle_close(h); 1076 native_handle_delete(h); 1077 h = 0; 1078 } 1079 return h; 1080} 1081 1082 1083int Parcel::readFileDescriptor() const 1084{ 1085 const flat_binder_object* flat = readObject(true); 1086 if (flat) { 1087 switch (flat->type) { 1088 case BINDER_TYPE_FD: 1089 //LOGI("Returning file descriptor %ld from parcel %p\n", flat->handle, this); 1090 return flat->handle; 1091 } 1092 } 1093 return BAD_TYPE; 1094} 1095 1096status_t Parcel::readBlob(size_t len, ReadableBlob* outBlob) const 1097{ 1098 int32_t useAshmem; 1099 status_t status = readInt32(&useAshmem); 1100 if (status) return status; 1101 1102 if (!useAshmem) { 1103 LOGV("readBlob: read in place"); 1104 const void* ptr = readInplace(len); 1105 if (!ptr) return BAD_VALUE; 1106 1107 outBlob->init(false /*mapped*/, const_cast<void*>(ptr), len); 1108 return NO_ERROR; 1109 } 1110 1111 LOGV("readBlob: read from ashmem"); 1112 int fd = readFileDescriptor(); 1113 if (fd == int(BAD_TYPE)) return BAD_VALUE; 1114 1115 void* ptr = ::mmap(NULL, len, PROT_READ, MAP_SHARED, fd, 0); 1116 if (!ptr) return NO_MEMORY; 1117 1118 outBlob->init(true /*mapped*/, ptr, len); 1119 return NO_ERROR; 1120} 1121 1122status_t Parcel::read(Flattenable& val) const 1123{ 1124 // size 1125 const size_t len = this->readInt32(); 1126 const size_t fd_count = this->readInt32(); 1127 1128 // payload 1129 void const* buf = this->readInplace(PAD_SIZE(len)); 1130 if (buf == NULL) 1131 return BAD_VALUE; 1132 1133 int* fds = NULL; 1134 if (fd_count) { 1135 fds = new int[fd_count]; 1136 } 1137 1138 status_t err = NO_ERROR; 1139 for (size_t i=0 ; i<fd_count && err==NO_ERROR ; i++) { 1140 fds[i] = dup(this->readFileDescriptor()); 1141 if (fds[i] < 0) err = BAD_VALUE; 1142 } 1143 1144 if (err == NO_ERROR) { 1145 err = val.unflatten(buf, len, fds, fd_count); 1146 } 1147 1148 if (fd_count) { 1149 delete [] fds; 1150 } 1151 1152 return err; 1153} 1154const flat_binder_object* Parcel::readObject(bool nullMetaData) const 1155{ 1156 const size_t DPOS = mDataPos; 1157 if ((DPOS+sizeof(flat_binder_object)) <= mDataSize) { 1158 const flat_binder_object* obj 1159 = reinterpret_cast<const flat_binder_object*>(mData+DPOS); 1160 mDataPos = DPOS + sizeof(flat_binder_object); 1161 if (!nullMetaData && (obj->cookie == NULL && obj->binder == NULL)) { 1162 // When transferring a NULL object, we don't write it into 1163 // the object list, so we don't want to check for it when 1164 // reading. 1165 LOGV("readObject Setting data pos of %p to %d\n", this, mDataPos); 1166 return obj; 1167 } 1168 1169 // Ensure that this object is valid... 1170 size_t* const OBJS = mObjects; 1171 const size_t N = mObjectsSize; 1172 size_t opos = mNextObjectHint; 1173 1174 if (N > 0) { 1175 LOGV("Parcel %p looking for obj at %d, hint=%d\n", 1176 this, DPOS, opos); 1177 1178 // Start at the current hint position, looking for an object at 1179 // the current data position. 1180 if (opos < N) { 1181 while (opos < (N-1) && OBJS[opos] < DPOS) { 1182 opos++; 1183 } 1184 } else { 1185 opos = N-1; 1186 } 1187 if (OBJS[opos] == DPOS) { 1188 // Found it! 1189 LOGV("Parcel found obj %d at index %d with forward search", 1190 this, DPOS, opos); 1191 mNextObjectHint = opos+1; 1192 LOGV("readObject Setting data pos of %p to %d\n", this, mDataPos); 1193 return obj; 1194 } 1195 1196 // Look backwards for it... 1197 while (opos > 0 && OBJS[opos] > DPOS) { 1198 opos--; 1199 } 1200 if (OBJS[opos] == DPOS) { 1201 // Found it! 1202 LOGV("Parcel found obj %d at index %d with backward search", 1203 this, DPOS, opos); 1204 mNextObjectHint = opos+1; 1205 LOGV("readObject Setting data pos of %p to %d\n", this, mDataPos); 1206 return obj; 1207 } 1208 } 1209 LOGW("Attempt to read object from Parcel %p at offset %d that is not in the object list", 1210 this, DPOS); 1211 } 1212 return NULL; 1213} 1214 1215void Parcel::closeFileDescriptors() 1216{ 1217 size_t i = mObjectsSize; 1218 if (i > 0) { 1219 //LOGI("Closing file descriptors for %d objects...", mObjectsSize); 1220 } 1221 while (i > 0) { 1222 i--; 1223 const flat_binder_object* flat 1224 = reinterpret_cast<flat_binder_object*>(mData+mObjects[i]); 1225 if (flat->type == BINDER_TYPE_FD) { 1226 //LOGI("Closing fd: %ld\n", flat->handle); 1227 close(flat->handle); 1228 } 1229 } 1230} 1231 1232const uint8_t* Parcel::ipcData() const 1233{ 1234 return mData; 1235} 1236 1237size_t Parcel::ipcDataSize() const 1238{ 1239 return (mDataSize > mDataPos ? mDataSize : mDataPos); 1240} 1241 1242const size_t* Parcel::ipcObjects() const 1243{ 1244 return mObjects; 1245} 1246 1247size_t Parcel::ipcObjectsCount() const 1248{ 1249 return mObjectsSize; 1250} 1251 1252void Parcel::ipcSetDataReference(const uint8_t* data, size_t dataSize, 1253 const size_t* objects, size_t objectsCount, release_func relFunc, void* relCookie) 1254{ 1255 freeDataNoInit(); 1256 mError = NO_ERROR; 1257 mData = const_cast<uint8_t*>(data); 1258 mDataSize = mDataCapacity = dataSize; 1259 //LOGI("setDataReference Setting data size of %p to %lu (pid=%d)\n", this, mDataSize, getpid()); 1260 mDataPos = 0; 1261 LOGV("setDataReference Setting data pos of %p to %d\n", this, mDataPos); 1262 mObjects = const_cast<size_t*>(objects); 1263 mObjectsSize = mObjectsCapacity = objectsCount; 1264 mNextObjectHint = 0; 1265 mOwner = relFunc; 1266 mOwnerCookie = relCookie; 1267 scanForFds(); 1268} 1269 1270void Parcel::print(TextOutput& to, uint32_t flags) const 1271{ 1272 to << "Parcel("; 1273 1274 if (errorCheck() != NO_ERROR) { 1275 const status_t err = errorCheck(); 1276 to << "Error: " << (void*)err << " \"" << strerror(-err) << "\""; 1277 } else if (dataSize() > 0) { 1278 const uint8_t* DATA = data(); 1279 to << indent << HexDump(DATA, dataSize()) << dedent; 1280 const size_t* OBJS = objects(); 1281 const size_t N = objectsCount(); 1282 for (size_t i=0; i<N; i++) { 1283 const flat_binder_object* flat 1284 = reinterpret_cast<const flat_binder_object*>(DATA+OBJS[i]); 1285 to << endl << "Object #" << i << " @ " << (void*)OBJS[i] << ": " 1286 << TypeCode(flat->type & 0x7f7f7f00) 1287 << " = " << flat->binder; 1288 } 1289 } else { 1290 to << "NULL"; 1291 } 1292 1293 to << ")"; 1294} 1295 1296void Parcel::releaseObjects() 1297{ 1298 const sp<ProcessState> proc(ProcessState::self()); 1299 size_t i = mObjectsSize; 1300 uint8_t* const data = mData; 1301 size_t* const objects = mObjects; 1302 while (i > 0) { 1303 i--; 1304 const flat_binder_object* flat 1305 = reinterpret_cast<flat_binder_object*>(data+objects[i]); 1306 release_object(proc, *flat, this); 1307 } 1308} 1309 1310void Parcel::acquireObjects() 1311{ 1312 const sp<ProcessState> proc(ProcessState::self()); 1313 size_t i = mObjectsSize; 1314 uint8_t* const data = mData; 1315 size_t* const objects = mObjects; 1316 while (i > 0) { 1317 i--; 1318 const flat_binder_object* flat 1319 = reinterpret_cast<flat_binder_object*>(data+objects[i]); 1320 acquire_object(proc, *flat, this); 1321 } 1322} 1323 1324void Parcel::freeData() 1325{ 1326 freeDataNoInit(); 1327 initState(); 1328} 1329 1330void Parcel::freeDataNoInit() 1331{ 1332 if (mOwner) { 1333 //LOGI("Freeing data ref of %p (pid=%d)\n", this, getpid()); 1334 mOwner(this, mData, mDataSize, mObjects, mObjectsSize, mOwnerCookie); 1335 } else { 1336 releaseObjects(); 1337 if (mData) free(mData); 1338 if (mObjects) free(mObjects); 1339 } 1340} 1341 1342status_t Parcel::growData(size_t len) 1343{ 1344 size_t newSize = ((mDataSize+len)*3)/2; 1345 return (newSize <= mDataSize) 1346 ? (status_t) NO_MEMORY 1347 : continueWrite(newSize); 1348} 1349 1350status_t Parcel::restartWrite(size_t desired) 1351{ 1352 if (mOwner) { 1353 freeData(); 1354 return continueWrite(desired); 1355 } 1356 1357 uint8_t* data = (uint8_t*)realloc(mData, desired); 1358 if (!data && desired > mDataCapacity) { 1359 mError = NO_MEMORY; 1360 return NO_MEMORY; 1361 } 1362 1363 releaseObjects(); 1364 1365 if (data) { 1366 mData = data; 1367 mDataCapacity = desired; 1368 } 1369 1370 mDataSize = mDataPos = 0; 1371 LOGV("restartWrite Setting data size of %p to %d\n", this, mDataSize); 1372 LOGV("restartWrite Setting data pos of %p to %d\n", this, mDataPos); 1373 1374 free(mObjects); 1375 mObjects = NULL; 1376 mObjectsSize = mObjectsCapacity = 0; 1377 mNextObjectHint = 0; 1378 mHasFds = false; 1379 mFdsKnown = true; 1380 mAllowFds = true; 1381 1382 return NO_ERROR; 1383} 1384 1385status_t Parcel::continueWrite(size_t desired) 1386{ 1387 // If shrinking, first adjust for any objects that appear 1388 // after the new data size. 1389 size_t objectsSize = mObjectsSize; 1390 if (desired < mDataSize) { 1391 if (desired == 0) { 1392 objectsSize = 0; 1393 } else { 1394 while (objectsSize > 0) { 1395 if (mObjects[objectsSize-1] < desired) 1396 break; 1397 objectsSize--; 1398 } 1399 } 1400 } 1401 1402 if (mOwner) { 1403 // If the size is going to zero, just release the owner's data. 1404 if (desired == 0) { 1405 freeData(); 1406 return NO_ERROR; 1407 } 1408 1409 // If there is a different owner, we need to take 1410 // posession. 1411 uint8_t* data = (uint8_t*)malloc(desired); 1412 if (!data) { 1413 mError = NO_MEMORY; 1414 return NO_MEMORY; 1415 } 1416 size_t* objects = NULL; 1417 1418 if (objectsSize) { 1419 objects = (size_t*)malloc(objectsSize*sizeof(size_t)); 1420 if (!objects) { 1421 mError = NO_MEMORY; 1422 return NO_MEMORY; 1423 } 1424 1425 // Little hack to only acquire references on objects 1426 // we will be keeping. 1427 size_t oldObjectsSize = mObjectsSize; 1428 mObjectsSize = objectsSize; 1429 acquireObjects(); 1430 mObjectsSize = oldObjectsSize; 1431 } 1432 1433 if (mData) { 1434 memcpy(data, mData, mDataSize < desired ? mDataSize : desired); 1435 } 1436 if (objects && mObjects) { 1437 memcpy(objects, mObjects, objectsSize*sizeof(size_t)); 1438 } 1439 //LOGI("Freeing data ref of %p (pid=%d)\n", this, getpid()); 1440 mOwner(this, mData, mDataSize, mObjects, mObjectsSize, mOwnerCookie); 1441 mOwner = NULL; 1442 1443 mData = data; 1444 mObjects = objects; 1445 mDataSize = (mDataSize < desired) ? mDataSize : desired; 1446 LOGV("continueWrite Setting data size of %p to %d\n", this, mDataSize); 1447 mDataCapacity = desired; 1448 mObjectsSize = mObjectsCapacity = objectsSize; 1449 mNextObjectHint = 0; 1450 1451 } else if (mData) { 1452 if (objectsSize < mObjectsSize) { 1453 // Need to release refs on any objects we are dropping. 1454 const sp<ProcessState> proc(ProcessState::self()); 1455 for (size_t i=objectsSize; i<mObjectsSize; i++) { 1456 const flat_binder_object* flat 1457 = reinterpret_cast<flat_binder_object*>(mData+mObjects[i]); 1458 if (flat->type == BINDER_TYPE_FD) { 1459 // will need to rescan because we may have lopped off the only FDs 1460 mFdsKnown = false; 1461 } 1462 release_object(proc, *flat, this); 1463 } 1464 size_t* objects = 1465 (size_t*)realloc(mObjects, objectsSize*sizeof(size_t)); 1466 if (objects) { 1467 mObjects = objects; 1468 } 1469 mObjectsSize = objectsSize; 1470 mNextObjectHint = 0; 1471 } 1472 1473 // We own the data, so we can just do a realloc(). 1474 if (desired > mDataCapacity) { 1475 uint8_t* data = (uint8_t*)realloc(mData, desired); 1476 if (data) { 1477 mData = data; 1478 mDataCapacity = desired; 1479 } else if (desired > mDataCapacity) { 1480 mError = NO_MEMORY; 1481 return NO_MEMORY; 1482 } 1483 } else { 1484 if (mDataSize > desired) { 1485 mDataSize = desired; 1486 LOGV("continueWrite Setting data size of %p to %d\n", this, mDataSize); 1487 } 1488 if (mDataPos > desired) { 1489 mDataPos = desired; 1490 LOGV("continueWrite Setting data pos of %p to %d\n", this, mDataPos); 1491 } 1492 } 1493 1494 } else { 1495 // This is the first data. Easy! 1496 uint8_t* data = (uint8_t*)malloc(desired); 1497 if (!data) { 1498 mError = NO_MEMORY; 1499 return NO_MEMORY; 1500 } 1501 1502 if(!(mDataCapacity == 0 && mObjects == NULL 1503 && mObjectsCapacity == 0)) { 1504 LOGE("continueWrite: %d/%p/%d/%d", mDataCapacity, mObjects, mObjectsCapacity, desired); 1505 } 1506 1507 mData = data; 1508 mDataSize = mDataPos = 0; 1509 LOGV("continueWrite Setting data size of %p to %d\n", this, mDataSize); 1510 LOGV("continueWrite Setting data pos of %p to %d\n", this, mDataPos); 1511 mDataCapacity = desired; 1512 } 1513 1514 return NO_ERROR; 1515} 1516 1517void Parcel::initState() 1518{ 1519 mError = NO_ERROR; 1520 mData = 0; 1521 mDataSize = 0; 1522 mDataCapacity = 0; 1523 mDataPos = 0; 1524 LOGV("initState Setting data size of %p to %d\n", this, mDataSize); 1525 LOGV("initState Setting data pos of %p to %d\n", this, mDataPos); 1526 mObjects = NULL; 1527 mObjectsSize = 0; 1528 mObjectsCapacity = 0; 1529 mNextObjectHint = 0; 1530 mHasFds = false; 1531 mFdsKnown = true; 1532 mAllowFds = true; 1533 mOwner = NULL; 1534} 1535 1536void Parcel::scanForFds() const 1537{ 1538 bool hasFds = false; 1539 for (size_t i=0; i<mObjectsSize; i++) { 1540 const flat_binder_object* flat 1541 = reinterpret_cast<const flat_binder_object*>(mData + mObjects[i]); 1542 if (flat->type == BINDER_TYPE_FD) { 1543 hasFds = true; 1544 break; 1545 } 1546 } 1547 mHasFds = hasFds; 1548 mFdsKnown = true; 1549} 1550 1551// --- Parcel::Blob --- 1552 1553Parcel::Blob::Blob() : 1554 mMapped(false), mData(NULL), mSize(0) { 1555} 1556 1557Parcel::Blob::~Blob() { 1558 release(); 1559} 1560 1561void Parcel::Blob::release() { 1562 if (mMapped && mData) { 1563 ::munmap(mData, mSize); 1564 } 1565 clear(); 1566} 1567 1568void Parcel::Blob::init(bool mapped, void* data, size_t size) { 1569 mMapped = mapped; 1570 mData = data; 1571 mSize = size; 1572} 1573 1574void Parcel::Blob::clear() { 1575 mMapped = false; 1576 mData = NULL; 1577 mSize = 0; 1578} 1579 1580}; // namespace android 1581