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(...) ALOG(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 ALOGD("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 ALOGE("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 ALOGE("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 ALOGE("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 ALOGE("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 ALOGV("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::pushAllowFds(bool allowFds) 451{ 452 const bool origValue = mAllowFds; 453 if (!allowFds) { 454 mAllowFds = false; 455 } 456 return origValue; 457} 458 459void Parcel::restoreAllowFds(bool lastValue) 460{ 461 mAllowFds = lastValue; 462} 463 464bool Parcel::hasFileDescriptors() const 465{ 466 if (!mFdsKnown) { 467 scanForFds(); 468 } 469 return mHasFds; 470} 471 472// Write RPC headers. (previously just the interface token) 473status_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 481bool Parcel::checkInterface(IBinder* binder) const 482{ 483 return enforceInterface(binder->getInterfaceDescriptor()); 484} 485 486bool 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 ALOGW("**** enforceInterface() expected '%s' but read '%s'\n", 508 String8(interface).string(), String8(str).string()); 509 return false; 510 } 511} 512 513const size_t* Parcel::objects() const 514{ 515 return mObjects; 516} 517 518size_t Parcel::objectsCount() const 519{ 520 return mObjectsSize; 521} 522 523status_t Parcel::errorCheck() const 524{ 525 return mError; 526} 527 528void Parcel::setError(status_t err) 529{ 530 mError = err; 531} 532 533status_t Parcel::finishWrite(size_t len) 534{ 535 //printf("Finish write of %d\n", len); 536 mDataPos += len; 537 ALOGV("finishWrite Setting data pos of %p to %d\n", this, mDataPos); 538 if (mDataPos > mDataSize) { 539 mDataSize = mDataPos; 540 ALOGV("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 546status_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) { 555restart_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 565status_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 575void* 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) { 585restart_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 615status_t Parcel::writeInt32(int32_t val) 616{ 617 return writeAligned(val); 618} 619 620status_t Parcel::writeInt64(int64_t val) 621{ 622 return writeAligned(val); 623} 624 625status_t Parcel::writeFloat(float val) 626{ 627 return writeAligned(val); 628} 629 630status_t Parcel::writeDouble(double val) 631{ 632 return writeAligned(val); 633} 634 635status_t Parcel::writeIntPtr(intptr_t val) 636{ 637 return writeAligned(val); 638} 639 640status_t Parcel::writeCString(const char* str) 641{ 642 return write(str, strlen(str)+1); 643} 644 645status_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 657status_t Parcel::writeString16(const String16& str) 658{ 659 return writeString16(str.string(), str.size()); 660} 661 662status_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 680status_t Parcel::writeStrongBinder(const sp<IBinder>& val) 681{ 682 return flatten_binder(ProcessState::self(), val, this); 683} 684 685status_t Parcel::writeWeakBinder(const wp<IBinder>& val) 686{ 687 return flatten_binder(ProcessState::self(), val, this); 688} 689 690status_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 ALOGD("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 713status_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 723status_t Parcel::writeDupFileDescriptor(int fd) 724{ 725 int dupFd = dup(fd); 726 if (dupFd < 0) { 727 return -errno; 728 } 729 status_t err = writeFileDescriptor(dupFd, true /*takeOwnership*/); 730 if (err) { 731 close(dupFd); 732 } 733 return err; 734} 735 736status_t Parcel::writeBlob(size_t len, WritableBlob* outBlob) 737{ 738 status_t status; 739 740 if (!mAllowFds || len <= IN_PLACE_BLOB_LIMIT) { 741 ALOGV("writeBlob: write in place"); 742 status = writeInt32(0); 743 if (status) return status; 744 745 void* ptr = writeInplace(len); 746 if (!ptr) return NO_MEMORY; 747 748 outBlob->init(false /*mapped*/, ptr, len); 749 return NO_ERROR; 750 } 751 752 ALOGV("writeBlob: write to ashmem"); 753 int fd = ashmem_create_region("Parcel Blob", len); 754 if (fd < 0) return NO_MEMORY; 755 756 int result = ashmem_set_prot_region(fd, PROT_READ | PROT_WRITE); 757 if (result < 0) { 758 status = result; 759 } else { 760 void* ptr = ::mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); 761 if (ptr == MAP_FAILED) { 762 status = -errno; 763 } else { 764 result = ashmem_set_prot_region(fd, PROT_READ); 765 if (result < 0) { 766 status = result; 767 } else { 768 status = writeInt32(1); 769 if (!status) { 770 status = writeFileDescriptor(fd, true /*takeOwnership*/); 771 if (!status) { 772 outBlob->init(true /*mapped*/, ptr, len); 773 return NO_ERROR; 774 } 775 } 776 } 777 } 778 ::munmap(ptr, len); 779 } 780 ::close(fd); 781 return status; 782} 783 784status_t Parcel::write(const Flattenable& val) 785{ 786 status_t err; 787 788 // size if needed 789 size_t len = val.getFlattenedSize(); 790 size_t fd_count = val.getFdCount(); 791 792 err = this->writeInt32(len); 793 if (err) return err; 794 795 err = this->writeInt32(fd_count); 796 if (err) return err; 797 798 // payload 799 void* buf = this->writeInplace(PAD_SIZE(len)); 800 if (buf == NULL) 801 return BAD_VALUE; 802 803 int* fds = NULL; 804 if (fd_count) { 805 fds = new int[fd_count]; 806 } 807 808 err = val.flatten(buf, len, fds, fd_count); 809 for (size_t i=0 ; i<fd_count && err==NO_ERROR ; i++) { 810 err = this->writeDupFileDescriptor( fds[i] ); 811 } 812 813 if (fd_count) { 814 delete [] fds; 815 } 816 817 return err; 818} 819 820status_t Parcel::writeObject(const flat_binder_object& val, bool nullMetaData) 821{ 822 const bool enoughData = (mDataPos+sizeof(val)) <= mDataCapacity; 823 const bool enoughObjects = mObjectsSize < mObjectsCapacity; 824 if (enoughData && enoughObjects) { 825restart_write: 826 *reinterpret_cast<flat_binder_object*>(mData+mDataPos) = val; 827 828 // Need to write meta-data? 829 if (nullMetaData || val.binder != NULL) { 830 mObjects[mObjectsSize] = mDataPos; 831 acquire_object(ProcessState::self(), val, this); 832 mObjectsSize++; 833 } 834 835 // remember if it's a file descriptor 836 if (val.type == BINDER_TYPE_FD) { 837 if (!mAllowFds) { 838 return FDS_NOT_ALLOWED; 839 } 840 mHasFds = mFdsKnown = true; 841 } 842 843 return finishWrite(sizeof(flat_binder_object)); 844 } 845 846 if (!enoughData) { 847 const status_t err = growData(sizeof(val)); 848 if (err != NO_ERROR) return err; 849 } 850 if (!enoughObjects) { 851 size_t newSize = ((mObjectsSize+2)*3)/2; 852 size_t* objects = (size_t*)realloc(mObjects, newSize*sizeof(size_t)); 853 if (objects == NULL) return NO_MEMORY; 854 mObjects = objects; 855 mObjectsCapacity = newSize; 856 } 857 858 goto restart_write; 859} 860 861status_t Parcel::writeNoException() 862{ 863 return writeInt32(0); 864} 865 866void Parcel::remove(size_t start, size_t amt) 867{ 868 LOG_ALWAYS_FATAL("Parcel::remove() not yet implemented!"); 869} 870 871status_t Parcel::read(void* outData, size_t len) const 872{ 873 if ((mDataPos+PAD_SIZE(len)) >= mDataPos && (mDataPos+PAD_SIZE(len)) <= mDataSize) { 874 memcpy(outData, mData+mDataPos, len); 875 mDataPos += PAD_SIZE(len); 876 ALOGV("read Setting data pos of %p to %d\n", this, mDataPos); 877 return NO_ERROR; 878 } 879 return NOT_ENOUGH_DATA; 880} 881 882const void* Parcel::readInplace(size_t len) const 883{ 884 if ((mDataPos+PAD_SIZE(len)) >= mDataPos && (mDataPos+PAD_SIZE(len)) <= mDataSize) { 885 const void* data = mData+mDataPos; 886 mDataPos += PAD_SIZE(len); 887 ALOGV("readInplace Setting data pos of %p to %d\n", this, mDataPos); 888 return data; 889 } 890 return NULL; 891} 892 893template<class T> 894status_t Parcel::readAligned(T *pArg) const { 895 COMPILE_TIME_ASSERT_FUNCTION_SCOPE(PAD_SIZE(sizeof(T)) == sizeof(T)); 896 897 if ((mDataPos+sizeof(T)) <= mDataSize) { 898 const void* data = mData+mDataPos; 899 mDataPos += sizeof(T); 900 *pArg = *reinterpret_cast<const T*>(data); 901 return NO_ERROR; 902 } else { 903 return NOT_ENOUGH_DATA; 904 } 905} 906 907template<class T> 908T Parcel::readAligned() const { 909 T result; 910 if (readAligned(&result) != NO_ERROR) { 911 result = 0; 912 } 913 914 return result; 915} 916 917template<class T> 918status_t Parcel::writeAligned(T val) { 919 COMPILE_TIME_ASSERT_FUNCTION_SCOPE(PAD_SIZE(sizeof(T)) == sizeof(T)); 920 921 if ((mDataPos+sizeof(val)) <= mDataCapacity) { 922restart_write: 923 *reinterpret_cast<T*>(mData+mDataPos) = val; 924 return finishWrite(sizeof(val)); 925 } 926 927 status_t err = growData(sizeof(val)); 928 if (err == NO_ERROR) goto restart_write; 929 return err; 930} 931 932status_t Parcel::readInt32(int32_t *pArg) const 933{ 934 return readAligned(pArg); 935} 936 937int32_t Parcel::readInt32() const 938{ 939 return readAligned<int32_t>(); 940} 941 942 943status_t Parcel::readInt64(int64_t *pArg) const 944{ 945 return readAligned(pArg); 946} 947 948 949int64_t Parcel::readInt64() const 950{ 951 return readAligned<int64_t>(); 952} 953 954status_t Parcel::readFloat(float *pArg) const 955{ 956 return readAligned(pArg); 957} 958 959 960float Parcel::readFloat() const 961{ 962 return readAligned<float>(); 963} 964 965status_t Parcel::readDouble(double *pArg) const 966{ 967 return readAligned(pArg); 968} 969 970 971double Parcel::readDouble() const 972{ 973 return readAligned<double>(); 974} 975 976status_t Parcel::readIntPtr(intptr_t *pArg) const 977{ 978 return readAligned(pArg); 979} 980 981 982intptr_t Parcel::readIntPtr() const 983{ 984 return readAligned<intptr_t>(); 985} 986 987 988const char* Parcel::readCString() const 989{ 990 const size_t avail = mDataSize-mDataPos; 991 if (avail > 0) { 992 const char* str = reinterpret_cast<const char*>(mData+mDataPos); 993 // is the string's trailing NUL within the parcel's valid bounds? 994 const char* eos = reinterpret_cast<const char*>(memchr(str, 0, avail)); 995 if (eos) { 996 const size_t len = eos - str; 997 mDataPos += PAD_SIZE(len+1); 998 ALOGV("readCString Setting data pos of %p to %d\n", this, mDataPos); 999 return str; 1000 } 1001 } 1002 return NULL; 1003} 1004 1005String8 Parcel::readString8() const 1006{ 1007 int32_t size = readInt32(); 1008 // watch for potential int overflow adding 1 for trailing NUL 1009 if (size > 0 && size < INT32_MAX) { 1010 const char* str = (const char*)readInplace(size+1); 1011 if (str) return String8(str, size); 1012 } 1013 return String8(); 1014} 1015 1016String16 Parcel::readString16() const 1017{ 1018 size_t len; 1019 const char16_t* str = readString16Inplace(&len); 1020 if (str) return String16(str, len); 1021 ALOGE("Reading a NULL string not supported here."); 1022 return String16(); 1023} 1024 1025const char16_t* Parcel::readString16Inplace(size_t* outLen) const 1026{ 1027 int32_t size = readInt32(); 1028 // watch for potential int overflow from size+1 1029 if (size >= 0 && size < INT32_MAX) { 1030 *outLen = size; 1031 const char16_t* str = (const char16_t*)readInplace((size+1)*sizeof(char16_t)); 1032 if (str != NULL) { 1033 return str; 1034 } 1035 } 1036 *outLen = 0; 1037 return NULL; 1038} 1039 1040sp<IBinder> Parcel::readStrongBinder() const 1041{ 1042 sp<IBinder> val; 1043 unflatten_binder(ProcessState::self(), *this, &val); 1044 return val; 1045} 1046 1047wp<IBinder> Parcel::readWeakBinder() const 1048{ 1049 wp<IBinder> val; 1050 unflatten_binder(ProcessState::self(), *this, &val); 1051 return val; 1052} 1053 1054int32_t Parcel::readExceptionCode() const 1055{ 1056 int32_t exception_code = readAligned<int32_t>(); 1057 if (exception_code == EX_HAS_REPLY_HEADER) { 1058 int32_t header_start = dataPosition(); 1059 int32_t header_size = readAligned<int32_t>(); 1060 // Skip over fat responses headers. Not used (or propagated) in 1061 // native code 1062 setDataPosition(header_start + header_size); 1063 // And fat response headers are currently only used when there are no 1064 // exceptions, so return no error: 1065 return 0; 1066 } 1067 return exception_code; 1068} 1069 1070native_handle* Parcel::readNativeHandle() const 1071{ 1072 int numFds, numInts; 1073 status_t err; 1074 err = readInt32(&numFds); 1075 if (err != NO_ERROR) return 0; 1076 err = readInt32(&numInts); 1077 if (err != NO_ERROR) return 0; 1078 1079 native_handle* h = native_handle_create(numFds, numInts); 1080 for (int i=0 ; err==NO_ERROR && i<numFds ; i++) { 1081 h->data[i] = dup(readFileDescriptor()); 1082 if (h->data[i] < 0) err = BAD_VALUE; 1083 } 1084 err = read(h->data + numFds, sizeof(int)*numInts); 1085 if (err != NO_ERROR) { 1086 native_handle_close(h); 1087 native_handle_delete(h); 1088 h = 0; 1089 } 1090 return h; 1091} 1092 1093 1094int Parcel::readFileDescriptor() const 1095{ 1096 const flat_binder_object* flat = readObject(true); 1097 if (flat) { 1098 switch (flat->type) { 1099 case BINDER_TYPE_FD: 1100 //ALOGI("Returning file descriptor %ld from parcel %p\n", flat->handle, this); 1101 return flat->handle; 1102 } 1103 } 1104 return BAD_TYPE; 1105} 1106 1107status_t Parcel::readBlob(size_t len, ReadableBlob* outBlob) const 1108{ 1109 int32_t useAshmem; 1110 status_t status = readInt32(&useAshmem); 1111 if (status) return status; 1112 1113 if (!useAshmem) { 1114 ALOGV("readBlob: read in place"); 1115 const void* ptr = readInplace(len); 1116 if (!ptr) return BAD_VALUE; 1117 1118 outBlob->init(false /*mapped*/, const_cast<void*>(ptr), len); 1119 return NO_ERROR; 1120 } 1121 1122 ALOGV("readBlob: read from ashmem"); 1123 int fd = readFileDescriptor(); 1124 if (fd == int(BAD_TYPE)) return BAD_VALUE; 1125 1126 void* ptr = ::mmap(NULL, len, PROT_READ, MAP_SHARED, fd, 0); 1127 if (!ptr) return NO_MEMORY; 1128 1129 outBlob->init(true /*mapped*/, ptr, len); 1130 return NO_ERROR; 1131} 1132 1133status_t Parcel::read(Flattenable& val) const 1134{ 1135 // size 1136 const size_t len = this->readInt32(); 1137 const size_t fd_count = this->readInt32(); 1138 1139 // payload 1140 void const* buf = this->readInplace(PAD_SIZE(len)); 1141 if (buf == NULL) 1142 return BAD_VALUE; 1143 1144 int* fds = NULL; 1145 if (fd_count) { 1146 fds = new int[fd_count]; 1147 } 1148 1149 status_t err = NO_ERROR; 1150 for (size_t i=0 ; i<fd_count && err==NO_ERROR ; i++) { 1151 fds[i] = dup(this->readFileDescriptor()); 1152 if (fds[i] < 0) err = BAD_VALUE; 1153 } 1154 1155 if (err == NO_ERROR) { 1156 err = val.unflatten(buf, len, fds, fd_count); 1157 } 1158 1159 if (fd_count) { 1160 delete [] fds; 1161 } 1162 1163 return err; 1164} 1165const flat_binder_object* Parcel::readObject(bool nullMetaData) const 1166{ 1167 const size_t DPOS = mDataPos; 1168 if ((DPOS+sizeof(flat_binder_object)) <= mDataSize) { 1169 const flat_binder_object* obj 1170 = reinterpret_cast<const flat_binder_object*>(mData+DPOS); 1171 mDataPos = DPOS + sizeof(flat_binder_object); 1172 if (!nullMetaData && (obj->cookie == NULL && obj->binder == NULL)) { 1173 // When transferring a NULL object, we don't write it into 1174 // the object list, so we don't want to check for it when 1175 // reading. 1176 ALOGV("readObject Setting data pos of %p to %d\n", this, mDataPos); 1177 return obj; 1178 } 1179 1180 // Ensure that this object is valid... 1181 size_t* const OBJS = mObjects; 1182 const size_t N = mObjectsSize; 1183 size_t opos = mNextObjectHint; 1184 1185 if (N > 0) { 1186 ALOGV("Parcel %p looking for obj at %d, hint=%d\n", 1187 this, DPOS, opos); 1188 1189 // Start at the current hint position, looking for an object at 1190 // the current data position. 1191 if (opos < N) { 1192 while (opos < (N-1) && OBJS[opos] < DPOS) { 1193 opos++; 1194 } 1195 } else { 1196 opos = N-1; 1197 } 1198 if (OBJS[opos] == DPOS) { 1199 // Found it! 1200 ALOGV("Parcel found obj %d at index %d with forward search", 1201 this, DPOS, opos); 1202 mNextObjectHint = opos+1; 1203 ALOGV("readObject Setting data pos of %p to %d\n", this, mDataPos); 1204 return obj; 1205 } 1206 1207 // Look backwards for it... 1208 while (opos > 0 && OBJS[opos] > DPOS) { 1209 opos--; 1210 } 1211 if (OBJS[opos] == DPOS) { 1212 // Found it! 1213 ALOGV("Parcel found obj %d at index %d with backward search", 1214 this, DPOS, opos); 1215 mNextObjectHint = opos+1; 1216 ALOGV("readObject Setting data pos of %p to %d\n", this, mDataPos); 1217 return obj; 1218 } 1219 } 1220 ALOGW("Attempt to read object from Parcel %p at offset %d that is not in the object list", 1221 this, DPOS); 1222 } 1223 return NULL; 1224} 1225 1226void Parcel::closeFileDescriptors() 1227{ 1228 size_t i = mObjectsSize; 1229 if (i > 0) { 1230 //ALOGI("Closing file descriptors for %d objects...", mObjectsSize); 1231 } 1232 while (i > 0) { 1233 i--; 1234 const flat_binder_object* flat 1235 = reinterpret_cast<flat_binder_object*>(mData+mObjects[i]); 1236 if (flat->type == BINDER_TYPE_FD) { 1237 //ALOGI("Closing fd: %ld\n", flat->handle); 1238 close(flat->handle); 1239 } 1240 } 1241} 1242 1243const uint8_t* Parcel::ipcData() const 1244{ 1245 return mData; 1246} 1247 1248size_t Parcel::ipcDataSize() const 1249{ 1250 return (mDataSize > mDataPos ? mDataSize : mDataPos); 1251} 1252 1253const size_t* Parcel::ipcObjects() const 1254{ 1255 return mObjects; 1256} 1257 1258size_t Parcel::ipcObjectsCount() const 1259{ 1260 return mObjectsSize; 1261} 1262 1263void Parcel::ipcSetDataReference(const uint8_t* data, size_t dataSize, 1264 const size_t* objects, size_t objectsCount, release_func relFunc, void* relCookie) 1265{ 1266 freeDataNoInit(); 1267 mError = NO_ERROR; 1268 mData = const_cast<uint8_t*>(data); 1269 mDataSize = mDataCapacity = dataSize; 1270 //ALOGI("setDataReference Setting data size of %p to %lu (pid=%d)\n", this, mDataSize, getpid()); 1271 mDataPos = 0; 1272 ALOGV("setDataReference Setting data pos of %p to %d\n", this, mDataPos); 1273 mObjects = const_cast<size_t*>(objects); 1274 mObjectsSize = mObjectsCapacity = objectsCount; 1275 mNextObjectHint = 0; 1276 mOwner = relFunc; 1277 mOwnerCookie = relCookie; 1278 scanForFds(); 1279} 1280 1281void Parcel::print(TextOutput& to, uint32_t flags) const 1282{ 1283 to << "Parcel("; 1284 1285 if (errorCheck() != NO_ERROR) { 1286 const status_t err = errorCheck(); 1287 to << "Error: " << (void*)err << " \"" << strerror(-err) << "\""; 1288 } else if (dataSize() > 0) { 1289 const uint8_t* DATA = data(); 1290 to << indent << HexDump(DATA, dataSize()) << dedent; 1291 const size_t* OBJS = objects(); 1292 const size_t N = objectsCount(); 1293 for (size_t i=0; i<N; i++) { 1294 const flat_binder_object* flat 1295 = reinterpret_cast<const flat_binder_object*>(DATA+OBJS[i]); 1296 to << endl << "Object #" << i << " @ " << (void*)OBJS[i] << ": " 1297 << TypeCode(flat->type & 0x7f7f7f00) 1298 << " = " << flat->binder; 1299 } 1300 } else { 1301 to << "NULL"; 1302 } 1303 1304 to << ")"; 1305} 1306 1307void Parcel::releaseObjects() 1308{ 1309 const sp<ProcessState> proc(ProcessState::self()); 1310 size_t i = mObjectsSize; 1311 uint8_t* const data = mData; 1312 size_t* const objects = mObjects; 1313 while (i > 0) { 1314 i--; 1315 const flat_binder_object* flat 1316 = reinterpret_cast<flat_binder_object*>(data+objects[i]); 1317 release_object(proc, *flat, this); 1318 } 1319} 1320 1321void Parcel::acquireObjects() 1322{ 1323 const sp<ProcessState> proc(ProcessState::self()); 1324 size_t i = mObjectsSize; 1325 uint8_t* const data = mData; 1326 size_t* const objects = mObjects; 1327 while (i > 0) { 1328 i--; 1329 const flat_binder_object* flat 1330 = reinterpret_cast<flat_binder_object*>(data+objects[i]); 1331 acquire_object(proc, *flat, this); 1332 } 1333} 1334 1335void Parcel::freeData() 1336{ 1337 freeDataNoInit(); 1338 initState(); 1339} 1340 1341void Parcel::freeDataNoInit() 1342{ 1343 if (mOwner) { 1344 //ALOGI("Freeing data ref of %p (pid=%d)\n", this, getpid()); 1345 mOwner(this, mData, mDataSize, mObjects, mObjectsSize, mOwnerCookie); 1346 } else { 1347 releaseObjects(); 1348 if (mData) free(mData); 1349 if (mObjects) free(mObjects); 1350 } 1351} 1352 1353status_t Parcel::growData(size_t len) 1354{ 1355 size_t newSize = ((mDataSize+len)*3)/2; 1356 return (newSize <= mDataSize) 1357 ? (status_t) NO_MEMORY 1358 : continueWrite(newSize); 1359} 1360 1361status_t Parcel::restartWrite(size_t desired) 1362{ 1363 if (mOwner) { 1364 freeData(); 1365 return continueWrite(desired); 1366 } 1367 1368 uint8_t* data = (uint8_t*)realloc(mData, desired); 1369 if (!data && desired > mDataCapacity) { 1370 mError = NO_MEMORY; 1371 return NO_MEMORY; 1372 } 1373 1374 releaseObjects(); 1375 1376 if (data) { 1377 mData = data; 1378 mDataCapacity = desired; 1379 } 1380 1381 mDataSize = mDataPos = 0; 1382 ALOGV("restartWrite Setting data size of %p to %d\n", this, mDataSize); 1383 ALOGV("restartWrite Setting data pos of %p to %d\n", this, mDataPos); 1384 1385 free(mObjects); 1386 mObjects = NULL; 1387 mObjectsSize = mObjectsCapacity = 0; 1388 mNextObjectHint = 0; 1389 mHasFds = false; 1390 mFdsKnown = true; 1391 mAllowFds = true; 1392 1393 return NO_ERROR; 1394} 1395 1396status_t Parcel::continueWrite(size_t desired) 1397{ 1398 // If shrinking, first adjust for any objects that appear 1399 // after the new data size. 1400 size_t objectsSize = mObjectsSize; 1401 if (desired < mDataSize) { 1402 if (desired == 0) { 1403 objectsSize = 0; 1404 } else { 1405 while (objectsSize > 0) { 1406 if (mObjects[objectsSize-1] < desired) 1407 break; 1408 objectsSize--; 1409 } 1410 } 1411 } 1412 1413 if (mOwner) { 1414 // If the size is going to zero, just release the owner's data. 1415 if (desired == 0) { 1416 freeData(); 1417 return NO_ERROR; 1418 } 1419 1420 // If there is a different owner, we need to take 1421 // posession. 1422 uint8_t* data = (uint8_t*)malloc(desired); 1423 if (!data) { 1424 mError = NO_MEMORY; 1425 return NO_MEMORY; 1426 } 1427 size_t* objects = NULL; 1428 1429 if (objectsSize) { 1430 objects = (size_t*)malloc(objectsSize*sizeof(size_t)); 1431 if (!objects) { 1432 mError = NO_MEMORY; 1433 return NO_MEMORY; 1434 } 1435 1436 // Little hack to only acquire references on objects 1437 // we will be keeping. 1438 size_t oldObjectsSize = mObjectsSize; 1439 mObjectsSize = objectsSize; 1440 acquireObjects(); 1441 mObjectsSize = oldObjectsSize; 1442 } 1443 1444 if (mData) { 1445 memcpy(data, mData, mDataSize < desired ? mDataSize : desired); 1446 } 1447 if (objects && mObjects) { 1448 memcpy(objects, mObjects, objectsSize*sizeof(size_t)); 1449 } 1450 //ALOGI("Freeing data ref of %p (pid=%d)\n", this, getpid()); 1451 mOwner(this, mData, mDataSize, mObjects, mObjectsSize, mOwnerCookie); 1452 mOwner = NULL; 1453 1454 mData = data; 1455 mObjects = objects; 1456 mDataSize = (mDataSize < desired) ? mDataSize : desired; 1457 ALOGV("continueWrite Setting data size of %p to %d\n", this, mDataSize); 1458 mDataCapacity = desired; 1459 mObjectsSize = mObjectsCapacity = objectsSize; 1460 mNextObjectHint = 0; 1461 1462 } else if (mData) { 1463 if (objectsSize < mObjectsSize) { 1464 // Need to release refs on any objects we are dropping. 1465 const sp<ProcessState> proc(ProcessState::self()); 1466 for (size_t i=objectsSize; i<mObjectsSize; i++) { 1467 const flat_binder_object* flat 1468 = reinterpret_cast<flat_binder_object*>(mData+mObjects[i]); 1469 if (flat->type == BINDER_TYPE_FD) { 1470 // will need to rescan because we may have lopped off the only FDs 1471 mFdsKnown = false; 1472 } 1473 release_object(proc, *flat, this); 1474 } 1475 size_t* objects = 1476 (size_t*)realloc(mObjects, objectsSize*sizeof(size_t)); 1477 if (objects) { 1478 mObjects = objects; 1479 } 1480 mObjectsSize = objectsSize; 1481 mNextObjectHint = 0; 1482 } 1483 1484 // We own the data, so we can just do a realloc(). 1485 if (desired > mDataCapacity) { 1486 uint8_t* data = (uint8_t*)realloc(mData, desired); 1487 if (data) { 1488 mData = data; 1489 mDataCapacity = desired; 1490 } else if (desired > mDataCapacity) { 1491 mError = NO_MEMORY; 1492 return NO_MEMORY; 1493 } 1494 } else { 1495 if (mDataSize > desired) { 1496 mDataSize = desired; 1497 ALOGV("continueWrite Setting data size of %p to %d\n", this, mDataSize); 1498 } 1499 if (mDataPos > desired) { 1500 mDataPos = desired; 1501 ALOGV("continueWrite Setting data pos of %p to %d\n", this, mDataPos); 1502 } 1503 } 1504 1505 } else { 1506 // This is the first data. Easy! 1507 uint8_t* data = (uint8_t*)malloc(desired); 1508 if (!data) { 1509 mError = NO_MEMORY; 1510 return NO_MEMORY; 1511 } 1512 1513 if(!(mDataCapacity == 0 && mObjects == NULL 1514 && mObjectsCapacity == 0)) { 1515 ALOGE("continueWrite: %d/%p/%d/%d", mDataCapacity, mObjects, mObjectsCapacity, desired); 1516 } 1517 1518 mData = data; 1519 mDataSize = mDataPos = 0; 1520 ALOGV("continueWrite Setting data size of %p to %d\n", this, mDataSize); 1521 ALOGV("continueWrite Setting data pos of %p to %d\n", this, mDataPos); 1522 mDataCapacity = desired; 1523 } 1524 1525 return NO_ERROR; 1526} 1527 1528void Parcel::initState() 1529{ 1530 mError = NO_ERROR; 1531 mData = 0; 1532 mDataSize = 0; 1533 mDataCapacity = 0; 1534 mDataPos = 0; 1535 ALOGV("initState Setting data size of %p to %d\n", this, mDataSize); 1536 ALOGV("initState Setting data pos of %p to %d\n", this, mDataPos); 1537 mObjects = NULL; 1538 mObjectsSize = 0; 1539 mObjectsCapacity = 0; 1540 mNextObjectHint = 0; 1541 mHasFds = false; 1542 mFdsKnown = true; 1543 mAllowFds = true; 1544 mOwner = NULL; 1545} 1546 1547void Parcel::scanForFds() const 1548{ 1549 bool hasFds = false; 1550 for (size_t i=0; i<mObjectsSize; i++) { 1551 const flat_binder_object* flat 1552 = reinterpret_cast<const flat_binder_object*>(mData + mObjects[i]); 1553 if (flat->type == BINDER_TYPE_FD) { 1554 hasFds = true; 1555 break; 1556 } 1557 } 1558 mHasFds = hasFds; 1559 mFdsKnown = true; 1560} 1561 1562// --- Parcel::Blob --- 1563 1564Parcel::Blob::Blob() : 1565 mMapped(false), mData(NULL), mSize(0) { 1566} 1567 1568Parcel::Blob::~Blob() { 1569 release(); 1570} 1571 1572void Parcel::Blob::release() { 1573 if (mMapped && mData) { 1574 ::munmap(mData, mSize); 1575 } 1576 clear(); 1577} 1578 1579void Parcel::Blob::init(bool mapped, void* data, size_t size) { 1580 mMapped = mapped; 1581 mData = data; 1582 mSize = size; 1583} 1584 1585void Parcel::Blob::clear() { 1586 mMapped = false; 1587 mData = NULL; 1588 mSize = 0; 1589} 1590 1591}; // namespace android 1592