Parcel.cpp revision 5c0106e134366312206702f1b072347e20c90374
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 <binder/ProcessState.h> 26#include <binder/TextOutput.h> 27 28#include <utils/Debug.h> 29#include <utils/Log.h> 30#include <utils/String8.h> 31#include <utils/String16.h> 32#include <utils/misc.h> 33#include <utils/Flattenable.h> 34#include <cutils/ashmem.h> 35 36#include <private/binder/binder_module.h> 37 38#include <stdio.h> 39#include <stdlib.h> 40#include <stdint.h> 41#include <sys/mman.h> 42 43#ifndef INT32_MAX 44#define INT32_MAX ((int32_t)(2147483647)) 45#endif 46 47#define LOG_REFS(...) 48//#define LOG_REFS(...) ALOG(LOG_DEBUG, "Parcel", __VA_ARGS__) 49 50// --------------------------------------------------------------------------- 51 52#define PAD_SIZE(s) (((s)+3)&~3) 53 54// Note: must be kept in sync with android/os/StrictMode.java's PENALTY_GATHER 55#define STRICT_MODE_PENALTY_GATHER 0x100 56 57// Note: must be kept in sync with android/os/Parcel.java's EX_HAS_REPLY_HEADER 58#define EX_HAS_REPLY_HEADER -128 59 60// Maximum size of a blob to transfer in-place. 61static const size_t IN_PLACE_BLOB_LIMIT = 40 * 1024; 62 63// XXX This can be made public if we want to provide 64// support for typed data. 65struct small_flat_data 66{ 67 uint32_t type; 68 uint32_t data; 69}; 70 71namespace android { 72 73void acquire_object(const sp<ProcessState>& proc, 74 const flat_binder_object& obj, const void* who) 75{ 76 switch (obj.type) { 77 case BINDER_TYPE_BINDER: 78 if (obj.binder) { 79 LOG_REFS("Parcel %p acquiring reference on local %p", who, obj.cookie); 80 static_cast<IBinder*>(obj.cookie)->incStrong(who); 81 } 82 return; 83 case BINDER_TYPE_WEAK_BINDER: 84 if (obj.binder) 85 static_cast<RefBase::weakref_type*>(obj.binder)->incWeak(who); 86 return; 87 case BINDER_TYPE_HANDLE: { 88 const sp<IBinder> b = proc->getStrongProxyForHandle(obj.handle); 89 if (b != NULL) { 90 LOG_REFS("Parcel %p acquiring reference on remote %p", who, b.get()); 91 b->incStrong(who); 92 } 93 return; 94 } 95 case BINDER_TYPE_WEAK_HANDLE: { 96 const wp<IBinder> b = proc->getWeakProxyForHandle(obj.handle); 97 if (b != NULL) b.get_refs()->incWeak(who); 98 return; 99 } 100 case BINDER_TYPE_FD: { 101 // intentionally blank -- nothing to do to acquire this, but we do 102 // recognize it as a legitimate object type. 103 return; 104 } 105 } 106 107 ALOGD("Invalid object type 0x%08lx", obj.type); 108} 109 110void release_object(const sp<ProcessState>& proc, 111 const flat_binder_object& obj, const void* who) 112{ 113 switch (obj.type) { 114 case BINDER_TYPE_BINDER: 115 if (obj.binder) { 116 LOG_REFS("Parcel %p releasing reference on local %p", who, obj.cookie); 117 static_cast<IBinder*>(obj.cookie)->decStrong(who); 118 } 119 return; 120 case BINDER_TYPE_WEAK_BINDER: 121 if (obj.binder) 122 static_cast<RefBase::weakref_type*>(obj.binder)->decWeak(who); 123 return; 124 case BINDER_TYPE_HANDLE: { 125 const sp<IBinder> b = proc->getStrongProxyForHandle(obj.handle); 126 if (b != NULL) { 127 LOG_REFS("Parcel %p releasing reference on remote %p", who, b.get()); 128 b->decStrong(who); 129 } 130 return; 131 } 132 case BINDER_TYPE_WEAK_HANDLE: { 133 const wp<IBinder> b = proc->getWeakProxyForHandle(obj.handle); 134 if (b != NULL) b.get_refs()->decWeak(who); 135 return; 136 } 137 case BINDER_TYPE_FD: { 138 if (obj.cookie != (void*)0) close(obj.handle); 139 return; 140 } 141 } 142 143 ALOGE("Invalid object type 0x%08lx", obj.type); 144} 145 146inline static status_t finish_flatten_binder( 147 const sp<IBinder>& binder, const flat_binder_object& flat, Parcel* out) 148{ 149 return out->writeObject(flat, false); 150} 151 152status_t flatten_binder(const sp<ProcessState>& proc, 153 const sp<IBinder>& binder, Parcel* out) 154{ 155 flat_binder_object obj; 156 157 obj.flags = 0x7f | FLAT_BINDER_FLAG_ACCEPTS_FDS; 158 if (binder != NULL) { 159 IBinder *local = binder->localBinder(); 160 if (!local) { 161 BpBinder *proxy = binder->remoteBinder(); 162 if (proxy == NULL) { 163 ALOGE("null proxy"); 164 } 165 const int32_t handle = proxy ? proxy->handle() : 0; 166 obj.type = BINDER_TYPE_HANDLE; 167 obj.handle = handle; 168 obj.cookie = NULL; 169 } else { 170 obj.type = BINDER_TYPE_BINDER; 171 obj.binder = local->getWeakRefs(); 172 obj.cookie = local; 173 } 174 } else { 175 obj.type = BINDER_TYPE_BINDER; 176 obj.binder = NULL; 177 obj.cookie = NULL; 178 } 179 180 return finish_flatten_binder(binder, obj, out); 181} 182 183status_t flatten_binder(const sp<ProcessState>& proc, 184 const wp<IBinder>& binder, Parcel* out) 185{ 186 flat_binder_object obj; 187 188 obj.flags = 0x7f | FLAT_BINDER_FLAG_ACCEPTS_FDS; 189 if (binder != NULL) { 190 sp<IBinder> real = binder.promote(); 191 if (real != NULL) { 192 IBinder *local = real->localBinder(); 193 if (!local) { 194 BpBinder *proxy = real->remoteBinder(); 195 if (proxy == NULL) { 196 ALOGE("null proxy"); 197 } 198 const int32_t handle = proxy ? proxy->handle() : 0; 199 obj.type = BINDER_TYPE_WEAK_HANDLE; 200 obj.handle = handle; 201 obj.cookie = NULL; 202 } else { 203 obj.type = BINDER_TYPE_WEAK_BINDER; 204 obj.binder = binder.get_refs(); 205 obj.cookie = binder.unsafe_get(); 206 } 207 return finish_flatten_binder(real, obj, out); 208 } 209 210 // XXX How to deal? In order to flatten the given binder, 211 // we need to probe it for information, which requires a primary 212 // reference... but we don't have one. 213 // 214 // The OpenBinder implementation uses a dynamic_cast<> here, 215 // but we can't do that with the different reference counting 216 // implementation we are using. 217 ALOGE("Unable to unflatten Binder weak reference!"); 218 obj.type = BINDER_TYPE_BINDER; 219 obj.binder = NULL; 220 obj.cookie = NULL; 221 return finish_flatten_binder(NULL, obj, out); 222 223 } else { 224 obj.type = BINDER_TYPE_BINDER; 225 obj.binder = NULL; 226 obj.cookie = NULL; 227 return finish_flatten_binder(NULL, obj, out); 228 } 229} 230 231inline static status_t finish_unflatten_binder( 232 BpBinder* proxy, const flat_binder_object& flat, const Parcel& in) 233{ 234 return NO_ERROR; 235} 236 237status_t unflatten_binder(const sp<ProcessState>& proc, 238 const Parcel& in, sp<IBinder>* out) 239{ 240 const flat_binder_object* flat = in.readObject(false); 241 242 if (flat) { 243 switch (flat->type) { 244 case BINDER_TYPE_BINDER: 245 *out = static_cast<IBinder*>(flat->cookie); 246 return finish_unflatten_binder(NULL, *flat, in); 247 case BINDER_TYPE_HANDLE: 248 *out = proc->getStrongProxyForHandle(flat->handle); 249 return finish_unflatten_binder( 250 static_cast<BpBinder*>(out->get()), *flat, in); 251 } 252 } 253 return BAD_TYPE; 254} 255 256status_t unflatten_binder(const sp<ProcessState>& proc, 257 const Parcel& in, wp<IBinder>* out) 258{ 259 const flat_binder_object* flat = in.readObject(false); 260 261 if (flat) { 262 switch (flat->type) { 263 case BINDER_TYPE_BINDER: 264 *out = static_cast<IBinder*>(flat->cookie); 265 return finish_unflatten_binder(NULL, *flat, in); 266 case BINDER_TYPE_WEAK_BINDER: 267 if (flat->binder != NULL) { 268 out->set_object_and_refs( 269 static_cast<IBinder*>(flat->cookie), 270 static_cast<RefBase::weakref_type*>(flat->binder)); 271 } else { 272 *out = NULL; 273 } 274 return finish_unflatten_binder(NULL, *flat, in); 275 case BINDER_TYPE_HANDLE: 276 case BINDER_TYPE_WEAK_HANDLE: 277 *out = proc->getWeakProxyForHandle(flat->handle); 278 return finish_unflatten_binder( 279 static_cast<BpBinder*>(out->unsafe_get()), *flat, in); 280 } 281 } 282 return BAD_TYPE; 283} 284 285// --------------------------------------------------------------------------- 286 287Parcel::Parcel() 288{ 289 initState(); 290} 291 292Parcel::~Parcel() 293{ 294 freeDataNoInit(); 295} 296 297const uint8_t* Parcel::data() const 298{ 299 return mData; 300} 301 302size_t Parcel::dataSize() const 303{ 304 return (mDataSize > mDataPos ? mDataSize : mDataPos); 305} 306 307size_t Parcel::dataAvail() const 308{ 309 // TODO: decide what to do about the possibility that this can 310 // report an available-data size that exceeds a Java int's max 311 // positive value, causing havoc. Fortunately this will only 312 // happen if someone constructs a Parcel containing more than two 313 // gigabytes of data, which on typical phone hardware is simply 314 // not possible. 315 return dataSize() - dataPosition(); 316} 317 318size_t Parcel::dataPosition() const 319{ 320 return mDataPos; 321} 322 323size_t Parcel::dataCapacity() const 324{ 325 return mDataCapacity; 326} 327 328status_t Parcel::setDataSize(size_t size) 329{ 330 status_t err; 331 err = continueWrite(size); 332 if (err == NO_ERROR) { 333 mDataSize = size; 334 ALOGV("setDataSize Setting data size of %p to %d\n", this, mDataSize); 335 } 336 return err; 337} 338 339void Parcel::setDataPosition(size_t pos) const 340{ 341 mDataPos = pos; 342 mNextObjectHint = 0; 343} 344 345status_t Parcel::setDataCapacity(size_t size) 346{ 347 if (size > mDataCapacity) return continueWrite(size); 348 return NO_ERROR; 349} 350 351status_t Parcel::setData(const uint8_t* buffer, size_t len) 352{ 353 status_t err = restartWrite(len); 354 if (err == NO_ERROR) { 355 memcpy(const_cast<uint8_t*>(data()), buffer, len); 356 mDataSize = len; 357 mFdsKnown = false; 358 } 359 return err; 360} 361 362status_t Parcel::appendFrom(const Parcel *parcel, size_t offset, size_t len) 363{ 364 const sp<ProcessState> proc(ProcessState::self()); 365 status_t err; 366 const uint8_t *data = parcel->mData; 367 const size_t *objects = parcel->mObjects; 368 size_t size = parcel->mObjectsSize; 369 int startPos = mDataPos; 370 int firstIndex = -1, lastIndex = -2; 371 372 if (len == 0) { 373 return NO_ERROR; 374 } 375 376 // range checks against the source parcel size 377 if ((offset > parcel->mDataSize) 378 || (len > parcel->mDataSize) 379 || (offset + len > parcel->mDataSize)) { 380 return BAD_VALUE; 381 } 382 383 // Count objects in range 384 for (int i = 0; i < (int) size; i++) { 385 size_t off = objects[i]; 386 if ((off >= offset) && (off < offset + len)) { 387 if (firstIndex == -1) { 388 firstIndex = i; 389 } 390 lastIndex = i; 391 } 392 } 393 int numObjects = lastIndex - firstIndex + 1; 394 395 if ((mDataSize+len) > mDataCapacity) { 396 // grow data 397 err = growData(len); 398 if (err != NO_ERROR) { 399 return err; 400 } 401 } 402 403 // append data 404 memcpy(mData + mDataPos, data + offset, len); 405 mDataPos += len; 406 mDataSize += len; 407 408 err = NO_ERROR; 409 410 if (numObjects > 0) { 411 // grow objects 412 if (mObjectsCapacity < mObjectsSize + numObjects) { 413 int newSize = ((mObjectsSize + numObjects)*3)/2; 414 size_t *objects = 415 (size_t*)realloc(mObjects, newSize*sizeof(size_t)); 416 if (objects == (size_t*)0) { 417 return NO_MEMORY; 418 } 419 mObjects = objects; 420 mObjectsCapacity = newSize; 421 } 422 423 // append and acquire objects 424 int idx = mObjectsSize; 425 for (int i = firstIndex; i <= lastIndex; i++) { 426 size_t off = objects[i] - offset + startPos; 427 mObjects[idx++] = off; 428 mObjectsSize++; 429 430 flat_binder_object* flat 431 = reinterpret_cast<flat_binder_object*>(mData + off); 432 acquire_object(proc, *flat, this); 433 434 if (flat->type == BINDER_TYPE_FD) { 435 // If this is a file descriptor, we need to dup it so the 436 // new Parcel now owns its own fd, and can declare that we 437 // officially know we have fds. 438 flat->handle = dup(flat->handle); 439 flat->cookie = (void*)1; 440 mHasFds = mFdsKnown = true; 441 if (!mAllowFds) { 442 err = FDS_NOT_ALLOWED; 443 } 444 } 445 } 446 } 447 448 return err; 449} 450 451bool Parcel::pushAllowFds(bool allowFds) 452{ 453 const bool origValue = mAllowFds; 454 if (!allowFds) { 455 mAllowFds = false; 456 } 457 return origValue; 458} 459 460void Parcel::restoreAllowFds(bool lastValue) 461{ 462 mAllowFds = lastValue; 463} 464 465bool Parcel::hasFileDescriptors() const 466{ 467 if (!mFdsKnown) { 468 scanForFds(); 469 } 470 return mHasFds; 471} 472 473// Write RPC headers. (previously just the interface token) 474status_t Parcel::writeInterfaceToken(const String16& interface) 475{ 476 writeInt32(IPCThreadState::self()->getStrictModePolicy() | 477 STRICT_MODE_PENALTY_GATHER); 478 // currently the interface identification token is just its name as a string 479 return writeString16(interface); 480} 481 482bool Parcel::checkInterface(IBinder* binder) const 483{ 484 return enforceInterface(binder->getInterfaceDescriptor()); 485} 486 487bool Parcel::enforceInterface(const String16& interface, 488 IPCThreadState* threadState) const 489{ 490 int32_t strictPolicy = readInt32(); 491 if (threadState == NULL) { 492 threadState = IPCThreadState::self(); 493 } 494 if ((threadState->getLastTransactionBinderFlags() & 495 IBinder::FLAG_ONEWAY) != 0) { 496 // For one-way calls, the callee is running entirely 497 // disconnected from the caller, so disable StrictMode entirely. 498 // Not only does disk/network usage not impact the caller, but 499 // there's no way to commuicate back any violations anyway. 500 threadState->setStrictModePolicy(0); 501 } else { 502 threadState->setStrictModePolicy(strictPolicy); 503 } 504 const String16 str(readString16()); 505 if (str == interface) { 506 return true; 507 } else { 508 ALOGW("**** enforceInterface() expected '%s' but read '%s'\n", 509 String8(interface).string(), String8(str).string()); 510 return false; 511 } 512} 513 514const size_t* Parcel::objects() const 515{ 516 return mObjects; 517} 518 519size_t Parcel::objectsCount() const 520{ 521 return mObjectsSize; 522} 523 524status_t Parcel::errorCheck() const 525{ 526 return mError; 527} 528 529void Parcel::setError(status_t err) 530{ 531 mError = err; 532} 533 534status_t Parcel::finishWrite(size_t len) 535{ 536 //printf("Finish write of %d\n", len); 537 mDataPos += len; 538 ALOGV("finishWrite Setting data pos of %p to %d\n", this, mDataPos); 539 if (mDataPos > mDataSize) { 540 mDataSize = mDataPos; 541 ALOGV("finishWrite Setting data size of %p to %d\n", this, mDataSize); 542 } 543 //printf("New pos=%d, size=%d\n", mDataPos, mDataSize); 544 return NO_ERROR; 545} 546 547status_t Parcel::writeUnpadded(const void* data, size_t len) 548{ 549 size_t end = mDataPos + len; 550 if (end < mDataPos) { 551 // integer overflow 552 return BAD_VALUE; 553 } 554 555 if (end <= mDataCapacity) { 556restart_write: 557 memcpy(mData+mDataPos, data, len); 558 return finishWrite(len); 559 } 560 561 status_t err = growData(len); 562 if (err == NO_ERROR) goto restart_write; 563 return err; 564} 565 566status_t Parcel::write(const void* data, size_t len) 567{ 568 void* const d = writeInplace(len); 569 if (d) { 570 memcpy(d, data, len); 571 return NO_ERROR; 572 } 573 return mError; 574} 575 576void* Parcel::writeInplace(size_t len) 577{ 578 const size_t padded = PAD_SIZE(len); 579 580 // sanity check for integer overflow 581 if (mDataPos+padded < mDataPos) { 582 return NULL; 583 } 584 585 if ((mDataPos+padded) <= mDataCapacity) { 586restart_write: 587 //printf("Writing %ld bytes, padded to %ld\n", len, padded); 588 uint8_t* const data = mData+mDataPos; 589 590 // Need to pad at end? 591 if (padded != len) { 592#if BYTE_ORDER == BIG_ENDIAN 593 static const uint32_t mask[4] = { 594 0x00000000, 0xffffff00, 0xffff0000, 0xff000000 595 }; 596#endif 597#if BYTE_ORDER == LITTLE_ENDIAN 598 static const uint32_t mask[4] = { 599 0x00000000, 0x00ffffff, 0x0000ffff, 0x000000ff 600 }; 601#endif 602 //printf("Applying pad mask: %p to %p\n", (void*)mask[padded-len], 603 // *reinterpret_cast<void**>(data+padded-4)); 604 *reinterpret_cast<uint32_t*>(data+padded-4) &= mask[padded-len]; 605 } 606 607 finishWrite(padded); 608 return data; 609 } 610 611 status_t err = growData(padded); 612 if (err == NO_ERROR) goto restart_write; 613 return NULL; 614} 615 616status_t Parcel::writeInt32(int32_t val) 617{ 618 return writeAligned(val); 619} 620status_t Parcel::writeInt32Array(size_t len, const int32_t *val) { 621 if (!val) { 622 return writeAligned(-1); 623 } 624 status_t ret = writeAligned(len); 625 if (ret == NO_ERROR) { 626 ret = write(val, len * sizeof(*val)); 627 } 628 return ret; 629} 630 631status_t Parcel::writeInt64(int64_t val) 632{ 633 return writeAligned(val); 634} 635 636status_t Parcel::writeFloat(float val) 637{ 638 return writeAligned(val); 639} 640 641#if defined(__mips__) && defined(__mips_hard_float) 642 643status_t Parcel::writeDouble(double val) 644{ 645 union { 646 double d; 647 unsigned long long ll; 648 } u; 649 u.d = val; 650 return writeAligned(u.ll); 651} 652 653#else 654 655status_t Parcel::writeDouble(double val) 656{ 657 return writeAligned(val); 658} 659 660#endif 661 662status_t Parcel::writeIntPtr(intptr_t val) 663{ 664 return writeAligned(val); 665} 666 667status_t Parcel::writeCString(const char* str) 668{ 669 return write(str, strlen(str)+1); 670} 671 672status_t Parcel::writeString8(const String8& str) 673{ 674 status_t err = writeInt32(str.bytes()); 675 // only write string if its length is more than zero characters, 676 // as readString8 will only read if the length field is non-zero. 677 // this is slightly different from how writeString16 works. 678 if (str.bytes() > 0 && err == NO_ERROR) { 679 err = write(str.string(), str.bytes()+1); 680 } 681 return err; 682} 683 684status_t Parcel::writeString16(const String16& str) 685{ 686 return writeString16(str.string(), str.size()); 687} 688 689status_t Parcel::writeString16(const char16_t* str, size_t len) 690{ 691 if (str == NULL) return writeInt32(-1); 692 693 status_t err = writeInt32(len); 694 if (err == NO_ERROR) { 695 len *= sizeof(char16_t); 696 uint8_t* data = (uint8_t*)writeInplace(len+sizeof(char16_t)); 697 if (data) { 698 memcpy(data, str, len); 699 *reinterpret_cast<char16_t*>(data+len) = 0; 700 return NO_ERROR; 701 } 702 err = mError; 703 } 704 return err; 705} 706 707status_t Parcel::writeStrongBinder(const sp<IBinder>& val) 708{ 709 return flatten_binder(ProcessState::self(), val, this); 710} 711 712status_t Parcel::writeWeakBinder(const wp<IBinder>& val) 713{ 714 return flatten_binder(ProcessState::self(), val, this); 715} 716 717status_t Parcel::writeNativeHandle(const native_handle* handle) 718{ 719 if (!handle || handle->version != sizeof(native_handle)) 720 return BAD_TYPE; 721 722 status_t err; 723 err = writeInt32(handle->numFds); 724 if (err != NO_ERROR) return err; 725 726 err = writeInt32(handle->numInts); 727 if (err != NO_ERROR) return err; 728 729 for (int i=0 ; err==NO_ERROR && i<handle->numFds ; i++) 730 err = writeDupFileDescriptor(handle->data[i]); 731 732 if (err != NO_ERROR) { 733 ALOGD("write native handle, write dup fd failed"); 734 return err; 735 } 736 err = write(handle->data + handle->numFds, sizeof(int)*handle->numInts); 737 return err; 738} 739 740status_t Parcel::writeFileDescriptor(int fd, bool takeOwnership) 741{ 742 flat_binder_object obj; 743 obj.type = BINDER_TYPE_FD; 744 obj.flags = 0x7f | FLAT_BINDER_FLAG_ACCEPTS_FDS; 745 obj.handle = fd; 746 obj.cookie = (void*) (takeOwnership ? 1 : 0); 747 return writeObject(obj, true); 748} 749 750status_t Parcel::writeDupFileDescriptor(int fd) 751{ 752 int dupFd = dup(fd); 753 if (dupFd < 0) { 754 return -errno; 755 } 756 status_t err = writeFileDescriptor(dupFd, true /*takeOwnership*/); 757 if (err) { 758 close(dupFd); 759 } 760 return err; 761} 762 763// WARNING: This method must stay in sync with 764// Parcelable.Creator<ParcelFileDescriptor> CREATOR 765// in frameworks/base/core/java/android/os/ParcelFileDescriptor.java 766status_t Parcel::writeParcelFileDescriptor(int fd, int commChannel) { 767 status_t status; 768 769 if (fd < 0) { 770 status = writeInt32(0); // ParcelFileDescriptor is null 771 if (status) return status; 772 } else { 773 status = writeInt32(1); // ParcelFileDescriptor is not null 774 if (status) return status; 775 status = writeDupFileDescriptor(fd); 776 if (status) return status; 777 if (commChannel < 0) { 778 status = writeInt32(0); // commChannel is null 779 if (status) return status; 780 } else { 781 status = writeInt32(1); // commChannel is not null 782 if (status) return status; 783 status = writeDupFileDescriptor(commChannel); 784 } 785 } 786 return status; 787} 788 789status_t Parcel::writeBlob(size_t len, WritableBlob* outBlob) 790{ 791 status_t status; 792 793 if (!mAllowFds || len <= IN_PLACE_BLOB_LIMIT) { 794 ALOGV("writeBlob: write in place"); 795 status = writeInt32(0); 796 if (status) return status; 797 798 void* ptr = writeInplace(len); 799 if (!ptr) return NO_MEMORY; 800 801 outBlob->init(false /*mapped*/, ptr, len); 802 return NO_ERROR; 803 } 804 805 ALOGV("writeBlob: write to ashmem"); 806 int fd = ashmem_create_region("Parcel Blob", len); 807 if (fd < 0) return NO_MEMORY; 808 809 int result = ashmem_set_prot_region(fd, PROT_READ | PROT_WRITE); 810 if (result < 0) { 811 status = result; 812 } else { 813 void* ptr = ::mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); 814 if (ptr == MAP_FAILED) { 815 status = -errno; 816 } else { 817 result = ashmem_set_prot_region(fd, PROT_READ); 818 if (result < 0) { 819 status = result; 820 } else { 821 status = writeInt32(1); 822 if (!status) { 823 status = writeFileDescriptor(fd, true /*takeOwnership*/); 824 if (!status) { 825 outBlob->init(true /*mapped*/, ptr, len); 826 return NO_ERROR; 827 } 828 } 829 } 830 } 831 ::munmap(ptr, len); 832 } 833 ::close(fd); 834 return status; 835} 836 837status_t Parcel::write(const FlattenableHelperInterface& val) 838{ 839 status_t err; 840 841 // size if needed 842 const size_t len = val.getFlattenedSize(); 843 const size_t fd_count = val.getFdCount(); 844 845 err = this->writeInt32(len); 846 if (err) return err; 847 848 err = this->writeInt32(fd_count); 849 if (err) return err; 850 851 // payload 852 void* const buf = this->writeInplace(PAD_SIZE(len)); 853 if (buf == NULL) 854 return BAD_VALUE; 855 856 int* fds = NULL; 857 if (fd_count) { 858 fds = new int[fd_count]; 859 } 860 861 err = val.flatten(buf, len, fds, fd_count); 862 for (size_t i=0 ; i<fd_count && err==NO_ERROR ; i++) { 863 err = this->writeDupFileDescriptor( fds[i] ); 864 } 865 866 if (fd_count) { 867 delete [] fds; 868 } 869 870 return err; 871} 872 873status_t Parcel::writeObject(const flat_binder_object& val, bool nullMetaData) 874{ 875 const bool enoughData = (mDataPos+sizeof(val)) <= mDataCapacity; 876 const bool enoughObjects = mObjectsSize < mObjectsCapacity; 877 if (enoughData && enoughObjects) { 878restart_write: 879 *reinterpret_cast<flat_binder_object*>(mData+mDataPos) = val; 880 881 // Need to write meta-data? 882 if (nullMetaData || val.binder != NULL) { 883 mObjects[mObjectsSize] = mDataPos; 884 acquire_object(ProcessState::self(), val, this); 885 mObjectsSize++; 886 } 887 888 // remember if it's a file descriptor 889 if (val.type == BINDER_TYPE_FD) { 890 if (!mAllowFds) { 891 return FDS_NOT_ALLOWED; 892 } 893 mHasFds = mFdsKnown = true; 894 } 895 896 return finishWrite(sizeof(flat_binder_object)); 897 } 898 899 if (!enoughData) { 900 const status_t err = growData(sizeof(val)); 901 if (err != NO_ERROR) return err; 902 } 903 if (!enoughObjects) { 904 size_t newSize = ((mObjectsSize+2)*3)/2; 905 size_t* objects = (size_t*)realloc(mObjects, newSize*sizeof(size_t)); 906 if (objects == NULL) return NO_MEMORY; 907 mObjects = objects; 908 mObjectsCapacity = newSize; 909 } 910 911 goto restart_write; 912} 913 914status_t Parcel::writeNoException() 915{ 916 return writeInt32(0); 917} 918 919void Parcel::remove(size_t start, size_t amt) 920{ 921 LOG_ALWAYS_FATAL("Parcel::remove() not yet implemented!"); 922} 923 924status_t Parcel::read(void* outData, size_t len) const 925{ 926 if ((mDataPos+PAD_SIZE(len)) >= mDataPos && (mDataPos+PAD_SIZE(len)) <= mDataSize) { 927 memcpy(outData, mData+mDataPos, len); 928 mDataPos += PAD_SIZE(len); 929 ALOGV("read Setting data pos of %p to %d\n", this, mDataPos); 930 return NO_ERROR; 931 } 932 return NOT_ENOUGH_DATA; 933} 934 935const void* Parcel::readInplace(size_t len) const 936{ 937 if ((mDataPos+PAD_SIZE(len)) >= mDataPos && (mDataPos+PAD_SIZE(len)) <= mDataSize) { 938 const void* data = mData+mDataPos; 939 mDataPos += PAD_SIZE(len); 940 ALOGV("readInplace Setting data pos of %p to %d\n", this, mDataPos); 941 return data; 942 } 943 return NULL; 944} 945 946template<class T> 947status_t Parcel::readAligned(T *pArg) const { 948 COMPILE_TIME_ASSERT_FUNCTION_SCOPE(PAD_SIZE(sizeof(T)) == sizeof(T)); 949 950 if ((mDataPos+sizeof(T)) <= mDataSize) { 951 const void* data = mData+mDataPos; 952 mDataPos += sizeof(T); 953 *pArg = *reinterpret_cast<const T*>(data); 954 return NO_ERROR; 955 } else { 956 return NOT_ENOUGH_DATA; 957 } 958} 959 960template<class T> 961T Parcel::readAligned() const { 962 T result; 963 if (readAligned(&result) != NO_ERROR) { 964 result = 0; 965 } 966 967 return result; 968} 969 970template<class T> 971status_t Parcel::writeAligned(T val) { 972 COMPILE_TIME_ASSERT_FUNCTION_SCOPE(PAD_SIZE(sizeof(T)) == sizeof(T)); 973 974 if ((mDataPos+sizeof(val)) <= mDataCapacity) { 975restart_write: 976 *reinterpret_cast<T*>(mData+mDataPos) = val; 977 return finishWrite(sizeof(val)); 978 } 979 980 status_t err = growData(sizeof(val)); 981 if (err == NO_ERROR) goto restart_write; 982 return err; 983} 984 985status_t Parcel::readInt32(int32_t *pArg) const 986{ 987 return readAligned(pArg); 988} 989 990int32_t Parcel::readInt32() const 991{ 992 return readAligned<int32_t>(); 993} 994 995 996status_t Parcel::readInt64(int64_t *pArg) const 997{ 998 return readAligned(pArg); 999} 1000 1001 1002int64_t Parcel::readInt64() const 1003{ 1004 return readAligned<int64_t>(); 1005} 1006 1007status_t Parcel::readFloat(float *pArg) const 1008{ 1009 return readAligned(pArg); 1010} 1011 1012 1013float Parcel::readFloat() const 1014{ 1015 return readAligned<float>(); 1016} 1017 1018#if defined(__mips__) && defined(__mips_hard_float) 1019 1020status_t Parcel::readDouble(double *pArg) const 1021{ 1022 union { 1023 double d; 1024 unsigned long long ll; 1025 } u; 1026 status_t status; 1027 status = readAligned(&u.ll); 1028 *pArg = u.d; 1029 return status; 1030} 1031 1032double Parcel::readDouble() const 1033{ 1034 union { 1035 double d; 1036 unsigned long long ll; 1037 } u; 1038 u.ll = readAligned<unsigned long long>(); 1039 return u.d; 1040} 1041 1042#else 1043 1044status_t Parcel::readDouble(double *pArg) const 1045{ 1046 return readAligned(pArg); 1047} 1048 1049double Parcel::readDouble() const 1050{ 1051 return readAligned<double>(); 1052} 1053 1054#endif 1055 1056status_t Parcel::readIntPtr(intptr_t *pArg) const 1057{ 1058 return readAligned(pArg); 1059} 1060 1061 1062intptr_t Parcel::readIntPtr() const 1063{ 1064 return readAligned<intptr_t>(); 1065} 1066 1067 1068const char* Parcel::readCString() const 1069{ 1070 const size_t avail = mDataSize-mDataPos; 1071 if (avail > 0) { 1072 const char* str = reinterpret_cast<const char*>(mData+mDataPos); 1073 // is the string's trailing NUL within the parcel's valid bounds? 1074 const char* eos = reinterpret_cast<const char*>(memchr(str, 0, avail)); 1075 if (eos) { 1076 const size_t len = eos - str; 1077 mDataPos += PAD_SIZE(len+1); 1078 ALOGV("readCString Setting data pos of %p to %d\n", this, mDataPos); 1079 return str; 1080 } 1081 } 1082 return NULL; 1083} 1084 1085String8 Parcel::readString8() const 1086{ 1087 int32_t size = readInt32(); 1088 // watch for potential int overflow adding 1 for trailing NUL 1089 if (size > 0 && size < INT32_MAX) { 1090 const char* str = (const char*)readInplace(size+1); 1091 if (str) return String8(str, size); 1092 } 1093 return String8(); 1094} 1095 1096String16 Parcel::readString16() const 1097{ 1098 size_t len; 1099 const char16_t* str = readString16Inplace(&len); 1100 if (str) return String16(str, len); 1101 ALOGE("Reading a NULL string not supported here."); 1102 return String16(); 1103} 1104 1105const char16_t* Parcel::readString16Inplace(size_t* outLen) const 1106{ 1107 int32_t size = readInt32(); 1108 // watch for potential int overflow from size+1 1109 if (size >= 0 && size < INT32_MAX) { 1110 *outLen = size; 1111 const char16_t* str = (const char16_t*)readInplace((size+1)*sizeof(char16_t)); 1112 if (str != NULL) { 1113 return str; 1114 } 1115 } 1116 *outLen = 0; 1117 return NULL; 1118} 1119 1120sp<IBinder> Parcel::readStrongBinder() const 1121{ 1122 sp<IBinder> val; 1123 unflatten_binder(ProcessState::self(), *this, &val); 1124 return val; 1125} 1126 1127wp<IBinder> Parcel::readWeakBinder() const 1128{ 1129 wp<IBinder> val; 1130 unflatten_binder(ProcessState::self(), *this, &val); 1131 return val; 1132} 1133 1134int32_t Parcel::readExceptionCode() const 1135{ 1136 int32_t exception_code = readAligned<int32_t>(); 1137 if (exception_code == EX_HAS_REPLY_HEADER) { 1138 int32_t header_start = dataPosition(); 1139 int32_t header_size = readAligned<int32_t>(); 1140 // Skip over fat responses headers. Not used (or propagated) in 1141 // native code 1142 setDataPosition(header_start + header_size); 1143 // And fat response headers are currently only used when there are no 1144 // exceptions, so return no error: 1145 return 0; 1146 } 1147 return exception_code; 1148} 1149 1150native_handle* Parcel::readNativeHandle() const 1151{ 1152 int numFds, numInts; 1153 status_t err; 1154 err = readInt32(&numFds); 1155 if (err != NO_ERROR) return 0; 1156 err = readInt32(&numInts); 1157 if (err != NO_ERROR) return 0; 1158 1159 native_handle* h = native_handle_create(numFds, numInts); 1160 for (int i=0 ; err==NO_ERROR && i<numFds ; i++) { 1161 h->data[i] = dup(readFileDescriptor()); 1162 if (h->data[i] < 0) err = BAD_VALUE; 1163 } 1164 err = read(h->data + numFds, sizeof(int)*numInts); 1165 if (err != NO_ERROR) { 1166 native_handle_close(h); 1167 native_handle_delete(h); 1168 h = 0; 1169 } 1170 return h; 1171} 1172 1173 1174int Parcel::readFileDescriptor() const 1175{ 1176 const flat_binder_object* flat = readObject(true); 1177 if (flat) { 1178 switch (flat->type) { 1179 case BINDER_TYPE_FD: 1180 //ALOGI("Returning file descriptor %ld from parcel %p\n", flat->handle, this); 1181 return flat->handle; 1182 } 1183 } 1184 return BAD_TYPE; 1185} 1186 1187// WARNING: This method must stay in sync with writeToParcel() 1188// in frameworks/base/core/java/android/os/ParcelFileDescriptor.java 1189int Parcel::readParcelFileDescriptor(int& outCommChannel) const { 1190 int fd; 1191 outCommChannel = -1; 1192 1193 if (readInt32() == 0) { 1194 fd = -1; 1195 } else { 1196 fd = readFileDescriptor(); 1197 if (fd >= 0 && readInt32() != 0) { 1198 outCommChannel = readFileDescriptor(); 1199 } 1200 } 1201 return fd; 1202} 1203 1204status_t Parcel::readBlob(size_t len, ReadableBlob* outBlob) const 1205{ 1206 int32_t useAshmem; 1207 status_t status = readInt32(&useAshmem); 1208 if (status) return status; 1209 1210 if (!useAshmem) { 1211 ALOGV("readBlob: read in place"); 1212 const void* ptr = readInplace(len); 1213 if (!ptr) return BAD_VALUE; 1214 1215 outBlob->init(false /*mapped*/, const_cast<void*>(ptr), len); 1216 return NO_ERROR; 1217 } 1218 1219 ALOGV("readBlob: read from ashmem"); 1220 int fd = readFileDescriptor(); 1221 if (fd == int(BAD_TYPE)) return BAD_VALUE; 1222 1223 void* ptr = ::mmap(NULL, len, PROT_READ, MAP_SHARED, fd, 0); 1224 if (!ptr) return NO_MEMORY; 1225 1226 outBlob->init(true /*mapped*/, ptr, len); 1227 return NO_ERROR; 1228} 1229 1230status_t Parcel::read(FlattenableHelperInterface& val) const 1231{ 1232 // size 1233 const size_t len = this->readInt32(); 1234 const size_t fd_count = this->readInt32(); 1235 1236 // payload 1237 void const* const buf = this->readInplace(PAD_SIZE(len)); 1238 if (buf == NULL) 1239 return BAD_VALUE; 1240 1241 int* fds = NULL; 1242 if (fd_count) { 1243 fds = new int[fd_count]; 1244 } 1245 1246 status_t err = NO_ERROR; 1247 for (size_t i=0 ; i<fd_count && err==NO_ERROR ; i++) { 1248 fds[i] = dup(this->readFileDescriptor()); 1249 if (fds[i] < 0) err = BAD_VALUE; 1250 } 1251 1252 if (err == NO_ERROR) { 1253 err = val.unflatten(buf, len, fds, fd_count); 1254 } 1255 1256 if (fd_count) { 1257 delete [] fds; 1258 } 1259 1260 return err; 1261} 1262const flat_binder_object* Parcel::readObject(bool nullMetaData) const 1263{ 1264 const size_t DPOS = mDataPos; 1265 if ((DPOS+sizeof(flat_binder_object)) <= mDataSize) { 1266 const flat_binder_object* obj 1267 = reinterpret_cast<const flat_binder_object*>(mData+DPOS); 1268 mDataPos = DPOS + sizeof(flat_binder_object); 1269 if (!nullMetaData && (obj->cookie == NULL && obj->binder == NULL)) { 1270 // When transferring a NULL object, we don't write it into 1271 // the object list, so we don't want to check for it when 1272 // reading. 1273 ALOGV("readObject Setting data pos of %p to %d\n", this, mDataPos); 1274 return obj; 1275 } 1276 1277 // Ensure that this object is valid... 1278 size_t* const OBJS = mObjects; 1279 const size_t N = mObjectsSize; 1280 size_t opos = mNextObjectHint; 1281 1282 if (N > 0) { 1283 ALOGV("Parcel %p looking for obj at %d, hint=%d\n", 1284 this, DPOS, opos); 1285 1286 // Start at the current hint position, looking for an object at 1287 // the current data position. 1288 if (opos < N) { 1289 while (opos < (N-1) && OBJS[opos] < DPOS) { 1290 opos++; 1291 } 1292 } else { 1293 opos = N-1; 1294 } 1295 if (OBJS[opos] == DPOS) { 1296 // Found it! 1297 ALOGV("Parcel found obj %d at index %d with forward search", 1298 this, DPOS, opos); 1299 mNextObjectHint = opos+1; 1300 ALOGV("readObject Setting data pos of %p to %d\n", this, mDataPos); 1301 return obj; 1302 } 1303 1304 // Look backwards for it... 1305 while (opos > 0 && OBJS[opos] > DPOS) { 1306 opos--; 1307 } 1308 if (OBJS[opos] == DPOS) { 1309 // Found it! 1310 ALOGV("Parcel found obj %d at index %d with backward search", 1311 this, DPOS, opos); 1312 mNextObjectHint = opos+1; 1313 ALOGV("readObject Setting data pos of %p to %d\n", this, mDataPos); 1314 return obj; 1315 } 1316 } 1317 ALOGW("Attempt to read object from Parcel %p at offset %d that is not in the object list", 1318 this, DPOS); 1319 } 1320 return NULL; 1321} 1322 1323void Parcel::closeFileDescriptors() 1324{ 1325 size_t i = mObjectsSize; 1326 if (i > 0) { 1327 //ALOGI("Closing file descriptors for %d objects...", mObjectsSize); 1328 } 1329 while (i > 0) { 1330 i--; 1331 const flat_binder_object* flat 1332 = reinterpret_cast<flat_binder_object*>(mData+mObjects[i]); 1333 if (flat->type == BINDER_TYPE_FD) { 1334 //ALOGI("Closing fd: %ld\n", flat->handle); 1335 close(flat->handle); 1336 } 1337 } 1338} 1339 1340const uint8_t* Parcel::ipcData() const 1341{ 1342 return mData; 1343} 1344 1345size_t Parcel::ipcDataSize() const 1346{ 1347 return (mDataSize > mDataPos ? mDataSize : mDataPos); 1348} 1349 1350const size_t* Parcel::ipcObjects() const 1351{ 1352 return mObjects; 1353} 1354 1355size_t Parcel::ipcObjectsCount() const 1356{ 1357 return mObjectsSize; 1358} 1359 1360void Parcel::ipcSetDataReference(const uint8_t* data, size_t dataSize, 1361 const size_t* objects, size_t objectsCount, release_func relFunc, void* relCookie) 1362{ 1363 freeDataNoInit(); 1364 mError = NO_ERROR; 1365 mData = const_cast<uint8_t*>(data); 1366 mDataSize = mDataCapacity = dataSize; 1367 //ALOGI("setDataReference Setting data size of %p to %lu (pid=%d)\n", this, mDataSize, getpid()); 1368 mDataPos = 0; 1369 ALOGV("setDataReference Setting data pos of %p to %d\n", this, mDataPos); 1370 mObjects = const_cast<size_t*>(objects); 1371 mObjectsSize = mObjectsCapacity = objectsCount; 1372 mNextObjectHint = 0; 1373 mOwner = relFunc; 1374 mOwnerCookie = relCookie; 1375 scanForFds(); 1376} 1377 1378void Parcel::print(TextOutput& to, uint32_t flags) const 1379{ 1380 to << "Parcel("; 1381 1382 if (errorCheck() != NO_ERROR) { 1383 const status_t err = errorCheck(); 1384 to << "Error: " << (void*)err << " \"" << strerror(-err) << "\""; 1385 } else if (dataSize() > 0) { 1386 const uint8_t* DATA = data(); 1387 to << indent << HexDump(DATA, dataSize()) << dedent; 1388 const size_t* OBJS = objects(); 1389 const size_t N = objectsCount(); 1390 for (size_t i=0; i<N; i++) { 1391 const flat_binder_object* flat 1392 = reinterpret_cast<const flat_binder_object*>(DATA+OBJS[i]); 1393 to << endl << "Object #" << i << " @ " << (void*)OBJS[i] << ": " 1394 << TypeCode(flat->type & 0x7f7f7f00) 1395 << " = " << flat->binder; 1396 } 1397 } else { 1398 to << "NULL"; 1399 } 1400 1401 to << ")"; 1402} 1403 1404void Parcel::releaseObjects() 1405{ 1406 const sp<ProcessState> proc(ProcessState::self()); 1407 size_t i = mObjectsSize; 1408 uint8_t* const data = mData; 1409 size_t* const objects = mObjects; 1410 while (i > 0) { 1411 i--; 1412 const flat_binder_object* flat 1413 = reinterpret_cast<flat_binder_object*>(data+objects[i]); 1414 release_object(proc, *flat, this); 1415 } 1416} 1417 1418void Parcel::acquireObjects() 1419{ 1420 const sp<ProcessState> proc(ProcessState::self()); 1421 size_t i = mObjectsSize; 1422 uint8_t* const data = mData; 1423 size_t* const objects = mObjects; 1424 while (i > 0) { 1425 i--; 1426 const flat_binder_object* flat 1427 = reinterpret_cast<flat_binder_object*>(data+objects[i]); 1428 acquire_object(proc, *flat, this); 1429 } 1430} 1431 1432void Parcel::freeData() 1433{ 1434 freeDataNoInit(); 1435 initState(); 1436} 1437 1438void Parcel::freeDataNoInit() 1439{ 1440 if (mOwner) { 1441 //ALOGI("Freeing data ref of %p (pid=%d)\n", this, getpid()); 1442 mOwner(this, mData, mDataSize, mObjects, mObjectsSize, mOwnerCookie); 1443 } else { 1444 releaseObjects(); 1445 if (mData) free(mData); 1446 if (mObjects) free(mObjects); 1447 } 1448} 1449 1450status_t Parcel::growData(size_t len) 1451{ 1452 size_t newSize = ((mDataSize+len)*3)/2; 1453 return (newSize <= mDataSize) 1454 ? (status_t) NO_MEMORY 1455 : continueWrite(newSize); 1456} 1457 1458status_t Parcel::restartWrite(size_t desired) 1459{ 1460 if (mOwner) { 1461 freeData(); 1462 return continueWrite(desired); 1463 } 1464 1465 uint8_t* data = (uint8_t*)realloc(mData, desired); 1466 if (!data && desired > mDataCapacity) { 1467 mError = NO_MEMORY; 1468 return NO_MEMORY; 1469 } 1470 1471 releaseObjects(); 1472 1473 if (data) { 1474 mData = data; 1475 mDataCapacity = desired; 1476 } 1477 1478 mDataSize = mDataPos = 0; 1479 ALOGV("restartWrite Setting data size of %p to %d\n", this, mDataSize); 1480 ALOGV("restartWrite Setting data pos of %p to %d\n", this, mDataPos); 1481 1482 free(mObjects); 1483 mObjects = NULL; 1484 mObjectsSize = mObjectsCapacity = 0; 1485 mNextObjectHint = 0; 1486 mHasFds = false; 1487 mFdsKnown = true; 1488 mAllowFds = true; 1489 1490 return NO_ERROR; 1491} 1492 1493status_t Parcel::continueWrite(size_t desired) 1494{ 1495 // If shrinking, first adjust for any objects that appear 1496 // after the new data size. 1497 size_t objectsSize = mObjectsSize; 1498 if (desired < mDataSize) { 1499 if (desired == 0) { 1500 objectsSize = 0; 1501 } else { 1502 while (objectsSize > 0) { 1503 if (mObjects[objectsSize-1] < desired) 1504 break; 1505 objectsSize--; 1506 } 1507 } 1508 } 1509 1510 if (mOwner) { 1511 // If the size is going to zero, just release the owner's data. 1512 if (desired == 0) { 1513 freeData(); 1514 return NO_ERROR; 1515 } 1516 1517 // If there is a different owner, we need to take 1518 // posession. 1519 uint8_t* data = (uint8_t*)malloc(desired); 1520 if (!data) { 1521 mError = NO_MEMORY; 1522 return NO_MEMORY; 1523 } 1524 size_t* objects = NULL; 1525 1526 if (objectsSize) { 1527 objects = (size_t*)malloc(objectsSize*sizeof(size_t)); 1528 if (!objects) { 1529 free(data); 1530 1531 mError = NO_MEMORY; 1532 return NO_MEMORY; 1533 } 1534 1535 // Little hack to only acquire references on objects 1536 // we will be keeping. 1537 size_t oldObjectsSize = mObjectsSize; 1538 mObjectsSize = objectsSize; 1539 acquireObjects(); 1540 mObjectsSize = oldObjectsSize; 1541 } 1542 1543 if (mData) { 1544 memcpy(data, mData, mDataSize < desired ? mDataSize : desired); 1545 } 1546 if (objects && mObjects) { 1547 memcpy(objects, mObjects, objectsSize*sizeof(size_t)); 1548 } 1549 //ALOGI("Freeing data ref of %p (pid=%d)\n", this, getpid()); 1550 mOwner(this, mData, mDataSize, mObjects, mObjectsSize, mOwnerCookie); 1551 mOwner = NULL; 1552 1553 mData = data; 1554 mObjects = objects; 1555 mDataSize = (mDataSize < desired) ? mDataSize : desired; 1556 ALOGV("continueWrite Setting data size of %p to %d\n", this, mDataSize); 1557 mDataCapacity = desired; 1558 mObjectsSize = mObjectsCapacity = objectsSize; 1559 mNextObjectHint = 0; 1560 1561 } else if (mData) { 1562 if (objectsSize < mObjectsSize) { 1563 // Need to release refs on any objects we are dropping. 1564 const sp<ProcessState> proc(ProcessState::self()); 1565 for (size_t i=objectsSize; i<mObjectsSize; i++) { 1566 const flat_binder_object* flat 1567 = reinterpret_cast<flat_binder_object*>(mData+mObjects[i]); 1568 if (flat->type == BINDER_TYPE_FD) { 1569 // will need to rescan because we may have lopped off the only FDs 1570 mFdsKnown = false; 1571 } 1572 release_object(proc, *flat, this); 1573 } 1574 size_t* objects = 1575 (size_t*)realloc(mObjects, objectsSize*sizeof(size_t)); 1576 if (objects) { 1577 mObjects = objects; 1578 } 1579 mObjectsSize = objectsSize; 1580 mNextObjectHint = 0; 1581 } 1582 1583 // We own the data, so we can just do a realloc(). 1584 if (desired > mDataCapacity) { 1585 uint8_t* data = (uint8_t*)realloc(mData, desired); 1586 if (data) { 1587 mData = data; 1588 mDataCapacity = desired; 1589 } else if (desired > mDataCapacity) { 1590 mError = NO_MEMORY; 1591 return NO_MEMORY; 1592 } 1593 } else { 1594 if (mDataSize > desired) { 1595 mDataSize = desired; 1596 ALOGV("continueWrite Setting data size of %p to %d\n", this, mDataSize); 1597 } 1598 if (mDataPos > desired) { 1599 mDataPos = desired; 1600 ALOGV("continueWrite Setting data pos of %p to %d\n", this, mDataPos); 1601 } 1602 } 1603 1604 } else { 1605 // This is the first data. Easy! 1606 uint8_t* data = (uint8_t*)malloc(desired); 1607 if (!data) { 1608 mError = NO_MEMORY; 1609 return NO_MEMORY; 1610 } 1611 1612 if(!(mDataCapacity == 0 && mObjects == NULL 1613 && mObjectsCapacity == 0)) { 1614 ALOGE("continueWrite: %d/%p/%d/%d", mDataCapacity, mObjects, mObjectsCapacity, desired); 1615 } 1616 1617 mData = data; 1618 mDataSize = mDataPos = 0; 1619 ALOGV("continueWrite Setting data size of %p to %d\n", this, mDataSize); 1620 ALOGV("continueWrite Setting data pos of %p to %d\n", this, mDataPos); 1621 mDataCapacity = desired; 1622 } 1623 1624 return NO_ERROR; 1625} 1626 1627void Parcel::initState() 1628{ 1629 mError = NO_ERROR; 1630 mData = 0; 1631 mDataSize = 0; 1632 mDataCapacity = 0; 1633 mDataPos = 0; 1634 ALOGV("initState Setting data size of %p to %d\n", this, mDataSize); 1635 ALOGV("initState Setting data pos of %p to %d\n", this, mDataPos); 1636 mObjects = NULL; 1637 mObjectsSize = 0; 1638 mObjectsCapacity = 0; 1639 mNextObjectHint = 0; 1640 mHasFds = false; 1641 mFdsKnown = true; 1642 mAllowFds = true; 1643 mOwner = NULL; 1644} 1645 1646void Parcel::scanForFds() const 1647{ 1648 bool hasFds = false; 1649 for (size_t i=0; i<mObjectsSize; i++) { 1650 const flat_binder_object* flat 1651 = reinterpret_cast<const flat_binder_object*>(mData + mObjects[i]); 1652 if (flat->type == BINDER_TYPE_FD) { 1653 hasFds = true; 1654 break; 1655 } 1656 } 1657 mHasFds = hasFds; 1658 mFdsKnown = true; 1659} 1660 1661// --- Parcel::Blob --- 1662 1663Parcel::Blob::Blob() : 1664 mMapped(false), mData(NULL), mSize(0) { 1665} 1666 1667Parcel::Blob::~Blob() { 1668 release(); 1669} 1670 1671void Parcel::Blob::release() { 1672 if (mMapped && mData) { 1673 ::munmap(mData, mSize); 1674 } 1675 clear(); 1676} 1677 1678void Parcel::Blob::init(bool mapped, void* data, size_t size) { 1679 mMapped = mapped; 1680 mData = data; 1681 mSize = size; 1682} 1683 1684void Parcel::Blob::clear() { 1685 mMapped = false; 1686 mData = NULL; 1687 mSize = 0; 1688} 1689 1690}; // namespace android 1691