Parcel.cpp revision 4ff0cb4404db31576cd8a81ca5ef3b044d492904
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 <inttypes.h> 39#include <stdio.h> 40#include <stdlib.h> 41#include <stdint.h> 42#include <sys/mman.h> 43 44#ifndef INT32_MAX 45#define INT32_MAX ((int32_t)(2147483647)) 46#endif 47 48#define LOG_REFS(...) 49//#define LOG_REFS(...) ALOG(LOG_DEBUG, "Parcel", __VA_ARGS__) 50 51// --------------------------------------------------------------------------- 52 53#define PAD_SIZE(s) (((s)+3)&~3) 54 55// Note: must be kept in sync with android/os/StrictMode.java's PENALTY_GATHER 56#define STRICT_MODE_PENALTY_GATHER 0x100 57 58// Note: must be kept in sync with android/os/Parcel.java's EX_HAS_REPLY_HEADER 59#define EX_HAS_REPLY_HEADER -128 60 61// Maximum size of a blob to transfer in-place. 62static const size_t IN_PLACE_BLOB_LIMIT = 40 * 1024; 63 64// XXX This can be made public if we want to provide 65// support for typed data. 66struct small_flat_data 67{ 68 uint32_t type; 69 uint32_t data; 70}; 71 72namespace android { 73 74void acquire_object(const sp<ProcessState>& proc, 75 const flat_binder_object& obj, const void* who) 76{ 77 switch (obj.type) { 78 case BINDER_TYPE_BINDER: 79 if (obj.binder) { 80 LOG_REFS("Parcel %p acquiring reference on local %p", who, obj.cookie); 81 static_cast<IBinder*>(obj.cookie)->incStrong(who); 82 } 83 return; 84 case BINDER_TYPE_WEAK_BINDER: 85 if (obj.binder) 86 static_cast<RefBase::weakref_type*>(obj.binder)->incWeak(who); 87 return; 88 case BINDER_TYPE_HANDLE: { 89 const sp<IBinder> b = proc->getStrongProxyForHandle(obj.handle); 90 if (b != NULL) { 91 LOG_REFS("Parcel %p acquiring reference on remote %p", who, b.get()); 92 b->incStrong(who); 93 } 94 return; 95 } 96 case BINDER_TYPE_WEAK_HANDLE: { 97 const wp<IBinder> b = proc->getWeakProxyForHandle(obj.handle); 98 if (b != NULL) b.get_refs()->incWeak(who); 99 return; 100 } 101 case BINDER_TYPE_FD: { 102 // intentionally blank -- nothing to do to acquire this, but we do 103 // recognize it as a legitimate object type. 104 return; 105 } 106 } 107 108 ALOGD("Invalid object type 0x%08lx", obj.type); 109} 110 111void release_object(const sp<ProcessState>& proc, 112 const flat_binder_object& obj, const void* who) 113{ 114 switch (obj.type) { 115 case BINDER_TYPE_BINDER: 116 if (obj.binder) { 117 LOG_REFS("Parcel %p releasing reference on local %p", who, obj.cookie); 118 static_cast<IBinder*>(obj.cookie)->decStrong(who); 119 } 120 return; 121 case BINDER_TYPE_WEAK_BINDER: 122 if (obj.binder) 123 static_cast<RefBase::weakref_type*>(obj.binder)->decWeak(who); 124 return; 125 case BINDER_TYPE_HANDLE: { 126 const sp<IBinder> b = proc->getStrongProxyForHandle(obj.handle); 127 if (b != NULL) { 128 LOG_REFS("Parcel %p releasing reference on remote %p", who, b.get()); 129 b->decStrong(who); 130 } 131 return; 132 } 133 case BINDER_TYPE_WEAK_HANDLE: { 134 const wp<IBinder> b = proc->getWeakProxyForHandle(obj.handle); 135 if (b != NULL) b.get_refs()->decWeak(who); 136 return; 137 } 138 case BINDER_TYPE_FD: { 139 if (obj.cookie != (void*)0) close(obj.handle); 140 return; 141 } 142 } 143 144 ALOGE("Invalid object type 0x%08lx", obj.type); 145} 146 147inline static status_t finish_flatten_binder( 148 const sp<IBinder>& binder, const flat_binder_object& flat, Parcel* out) 149{ 150 return out->writeObject(flat, false); 151} 152 153status_t flatten_binder(const sp<ProcessState>& proc, 154 const sp<IBinder>& binder, Parcel* out) 155{ 156 flat_binder_object obj; 157 158 obj.flags = 0x7f | FLAT_BINDER_FLAG_ACCEPTS_FDS; 159 if (binder != NULL) { 160 IBinder *local = binder->localBinder(); 161 if (!local) { 162 BpBinder *proxy = binder->remoteBinder(); 163 if (proxy == NULL) { 164 ALOGE("null proxy"); 165 } 166 const int32_t handle = proxy ? proxy->handle() : 0; 167 obj.type = BINDER_TYPE_HANDLE; 168 obj.handle = handle; 169 obj.cookie = NULL; 170 } else { 171 obj.type = BINDER_TYPE_BINDER; 172 obj.binder = local->getWeakRefs(); 173 obj.cookie = local; 174 } 175 } else { 176 obj.type = BINDER_TYPE_BINDER; 177 obj.binder = NULL; 178 obj.cookie = NULL; 179 } 180 181 return finish_flatten_binder(binder, obj, out); 182} 183 184status_t flatten_binder(const sp<ProcessState>& proc, 185 const wp<IBinder>& binder, Parcel* out) 186{ 187 flat_binder_object obj; 188 189 obj.flags = 0x7f | FLAT_BINDER_FLAG_ACCEPTS_FDS; 190 if (binder != NULL) { 191 sp<IBinder> real = binder.promote(); 192 if (real != NULL) { 193 IBinder *local = real->localBinder(); 194 if (!local) { 195 BpBinder *proxy = real->remoteBinder(); 196 if (proxy == NULL) { 197 ALOGE("null proxy"); 198 } 199 const int32_t handle = proxy ? proxy->handle() : 0; 200 obj.type = BINDER_TYPE_WEAK_HANDLE; 201 obj.handle = handle; 202 obj.cookie = NULL; 203 } else { 204 obj.type = BINDER_TYPE_WEAK_BINDER; 205 obj.binder = binder.get_refs(); 206 obj.cookie = binder.unsafe_get(); 207 } 208 return finish_flatten_binder(real, obj, out); 209 } 210 211 // XXX How to deal? In order to flatten the given binder, 212 // we need to probe it for information, which requires a primary 213 // reference... but we don't have one. 214 // 215 // The OpenBinder implementation uses a dynamic_cast<> here, 216 // but we can't do that with the different reference counting 217 // implementation we are using. 218 ALOGE("Unable to unflatten Binder weak reference!"); 219 obj.type = BINDER_TYPE_BINDER; 220 obj.binder = NULL; 221 obj.cookie = NULL; 222 return finish_flatten_binder(NULL, obj, out); 223 224 } else { 225 obj.type = BINDER_TYPE_BINDER; 226 obj.binder = NULL; 227 obj.cookie = NULL; 228 return finish_flatten_binder(NULL, obj, out); 229 } 230} 231 232inline static status_t finish_unflatten_binder( 233 BpBinder* proxy, const flat_binder_object& flat, const Parcel& in) 234{ 235 return NO_ERROR; 236} 237 238status_t unflatten_binder(const sp<ProcessState>& proc, 239 const Parcel& in, sp<IBinder>* out) 240{ 241 const flat_binder_object* flat = in.readObject(false); 242 243 if (flat) { 244 switch (flat->type) { 245 case BINDER_TYPE_BINDER: 246 *out = static_cast<IBinder*>(flat->cookie); 247 return finish_unflatten_binder(NULL, *flat, in); 248 case BINDER_TYPE_HANDLE: 249 *out = proc->getStrongProxyForHandle(flat->handle); 250 return finish_unflatten_binder( 251 static_cast<BpBinder*>(out->get()), *flat, in); 252 } 253 } 254 return BAD_TYPE; 255} 256 257status_t unflatten_binder(const sp<ProcessState>& proc, 258 const Parcel& in, wp<IBinder>* out) 259{ 260 const flat_binder_object* flat = in.readObject(false); 261 262 if (flat) { 263 switch (flat->type) { 264 case BINDER_TYPE_BINDER: 265 *out = static_cast<IBinder*>(flat->cookie); 266 return finish_unflatten_binder(NULL, *flat, in); 267 case BINDER_TYPE_WEAK_BINDER: 268 if (flat->binder != NULL) { 269 out->set_object_and_refs( 270 static_cast<IBinder*>(flat->cookie), 271 static_cast<RefBase::weakref_type*>(flat->binder)); 272 } else { 273 *out = NULL; 274 } 275 return finish_unflatten_binder(NULL, *flat, in); 276 case BINDER_TYPE_HANDLE: 277 case BINDER_TYPE_WEAK_HANDLE: 278 *out = proc->getWeakProxyForHandle(flat->handle); 279 return finish_unflatten_binder( 280 static_cast<BpBinder*>(out->unsafe_get()), *flat, in); 281 } 282 } 283 return BAD_TYPE; 284} 285 286// --------------------------------------------------------------------------- 287 288Parcel::Parcel() 289{ 290 initState(); 291} 292 293Parcel::~Parcel() 294{ 295 freeDataNoInit(); 296} 297 298const uint8_t* Parcel::data() const 299{ 300 return mData; 301} 302 303size_t Parcel::dataSize() const 304{ 305 return (mDataSize > mDataPos ? mDataSize : mDataPos); 306} 307 308size_t Parcel::dataAvail() const 309{ 310 // TODO: decide what to do about the possibility that this can 311 // report an available-data size that exceeds a Java int's max 312 // positive value, causing havoc. Fortunately this will only 313 // happen if someone constructs a Parcel containing more than two 314 // gigabytes of data, which on typical phone hardware is simply 315 // not possible. 316 return dataSize() - dataPosition(); 317} 318 319size_t Parcel::dataPosition() const 320{ 321 return mDataPos; 322} 323 324size_t Parcel::dataCapacity() const 325{ 326 return mDataCapacity; 327} 328 329status_t Parcel::setDataSize(size_t size) 330{ 331 status_t err; 332 err = continueWrite(size); 333 if (err == NO_ERROR) { 334 mDataSize = size; 335 ALOGV("setDataSize Setting data size of %p to %d\n", this, mDataSize); 336 } 337 return err; 338} 339 340void Parcel::setDataPosition(size_t pos) const 341{ 342 mDataPos = pos; 343 mNextObjectHint = 0; 344} 345 346status_t Parcel::setDataCapacity(size_t size) 347{ 348 if (size > mDataCapacity) return continueWrite(size); 349 return NO_ERROR; 350} 351 352status_t Parcel::setData(const uint8_t* buffer, size_t len) 353{ 354 status_t err = restartWrite(len); 355 if (err == NO_ERROR) { 356 memcpy(const_cast<uint8_t*>(data()), buffer, len); 357 mDataSize = len; 358 mFdsKnown = false; 359 } 360 return err; 361} 362 363status_t Parcel::appendFrom(const Parcel *parcel, size_t offset, size_t len) 364{ 365 const sp<ProcessState> proc(ProcessState::self()); 366 status_t err; 367 const uint8_t *data = parcel->mData; 368 const size_t *objects = parcel->mObjects; 369 size_t size = parcel->mObjectsSize; 370 int startPos = mDataPos; 371 int firstIndex = -1, lastIndex = -2; 372 373 if (len == 0) { 374 return NO_ERROR; 375 } 376 377 // range checks against the source parcel size 378 if ((offset > parcel->mDataSize) 379 || (len > parcel->mDataSize) 380 || (offset + len > parcel->mDataSize)) { 381 return BAD_VALUE; 382 } 383 384 // Count objects in range 385 for (int i = 0; i < (int) size; i++) { 386 size_t off = objects[i]; 387 if ((off >= offset) && (off < offset + len)) { 388 if (firstIndex == -1) { 389 firstIndex = i; 390 } 391 lastIndex = i; 392 } 393 } 394 int numObjects = lastIndex - firstIndex + 1; 395 396 if ((mDataSize+len) > mDataCapacity) { 397 // grow data 398 err = growData(len); 399 if (err != NO_ERROR) { 400 return err; 401 } 402 } 403 404 // append data 405 memcpy(mData + mDataPos, data + offset, len); 406 mDataPos += len; 407 mDataSize += len; 408 409 err = NO_ERROR; 410 411 if (numObjects > 0) { 412 // grow objects 413 if (mObjectsCapacity < mObjectsSize + numObjects) { 414 int newSize = ((mObjectsSize + numObjects)*3)/2; 415 size_t *objects = 416 (size_t*)realloc(mObjects, newSize*sizeof(size_t)); 417 if (objects == (size_t*)0) { 418 return NO_MEMORY; 419 } 420 mObjects = objects; 421 mObjectsCapacity = newSize; 422 } 423 424 // append and acquire objects 425 int idx = mObjectsSize; 426 for (int i = firstIndex; i <= lastIndex; i++) { 427 size_t off = objects[i] - offset + startPos; 428 mObjects[idx++] = off; 429 mObjectsSize++; 430 431 flat_binder_object* flat 432 = reinterpret_cast<flat_binder_object*>(mData + off); 433 acquire_object(proc, *flat, this); 434 435 if (flat->type == BINDER_TYPE_FD) { 436 // If this is a file descriptor, we need to dup it so the 437 // new Parcel now owns its own fd, and can declare that we 438 // officially know we have fds. 439 flat->handle = dup(flat->handle); 440 flat->cookie = (void*)1; 441 mHasFds = mFdsKnown = true; 442 if (!mAllowFds) { 443 err = FDS_NOT_ALLOWED; 444 } 445 } 446 } 447 } 448 449 return err; 450} 451 452bool Parcel::pushAllowFds(bool allowFds) 453{ 454 const bool origValue = mAllowFds; 455 if (!allowFds) { 456 mAllowFds = false; 457 } 458 return origValue; 459} 460 461void Parcel::restoreAllowFds(bool lastValue) 462{ 463 mAllowFds = lastValue; 464} 465 466bool Parcel::hasFileDescriptors() const 467{ 468 if (!mFdsKnown) { 469 scanForFds(); 470 } 471 return mHasFds; 472} 473 474// Write RPC headers. (previously just the interface token) 475status_t Parcel::writeInterfaceToken(const String16& interface) 476{ 477 writeInt32(IPCThreadState::self()->getStrictModePolicy() | 478 STRICT_MODE_PENALTY_GATHER); 479 // currently the interface identification token is just its name as a string 480 return writeString16(interface); 481} 482 483bool Parcel::checkInterface(IBinder* binder) const 484{ 485 return enforceInterface(binder->getInterfaceDescriptor()); 486} 487 488bool Parcel::enforceInterface(const String16& interface, 489 IPCThreadState* threadState) const 490{ 491 int32_t strictPolicy = readInt32(); 492 if (threadState == NULL) { 493 threadState = IPCThreadState::self(); 494 } 495 if ((threadState->getLastTransactionBinderFlags() & 496 IBinder::FLAG_ONEWAY) != 0) { 497 // For one-way calls, the callee is running entirely 498 // disconnected from the caller, so disable StrictMode entirely. 499 // Not only does disk/network usage not impact the caller, but 500 // there's no way to commuicate back any violations anyway. 501 threadState->setStrictModePolicy(0); 502 } else { 503 threadState->setStrictModePolicy(strictPolicy); 504 } 505 const String16 str(readString16()); 506 if (str == interface) { 507 return true; 508 } else { 509 ALOGW("**** enforceInterface() expected '%s' but read '%s'\n", 510 String8(interface).string(), String8(str).string()); 511 return false; 512 } 513} 514 515const size_t* Parcel::objects() const 516{ 517 return mObjects; 518} 519 520size_t Parcel::objectsCount() const 521{ 522 return mObjectsSize; 523} 524 525status_t Parcel::errorCheck() const 526{ 527 return mError; 528} 529 530void Parcel::setError(status_t err) 531{ 532 mError = err; 533} 534 535status_t Parcel::finishWrite(size_t len) 536{ 537 //printf("Finish write of %d\n", len); 538 mDataPos += len; 539 ALOGV("finishWrite Setting data pos of %p to %d\n", this, mDataPos); 540 if (mDataPos > mDataSize) { 541 mDataSize = mDataPos; 542 ALOGV("finishWrite Setting data size of %p to %d\n", this, mDataSize); 543 } 544 //printf("New pos=%d, size=%d\n", mDataPos, mDataSize); 545 return NO_ERROR; 546} 547 548status_t Parcel::writeUnpadded(const void* data, size_t len) 549{ 550 size_t end = mDataPos + len; 551 if (end < mDataPos) { 552 // integer overflow 553 return BAD_VALUE; 554 } 555 556 if (end <= mDataCapacity) { 557restart_write: 558 memcpy(mData+mDataPos, data, len); 559 return finishWrite(len); 560 } 561 562 status_t err = growData(len); 563 if (err == NO_ERROR) goto restart_write; 564 return err; 565} 566 567status_t Parcel::write(const void* data, size_t len) 568{ 569 void* const d = writeInplace(len); 570 if (d) { 571 memcpy(d, data, len); 572 return NO_ERROR; 573 } 574 return mError; 575} 576 577void* Parcel::writeInplace(size_t len) 578{ 579 const size_t padded = PAD_SIZE(len); 580 581 // sanity check for integer overflow 582 if (mDataPos+padded < mDataPos) { 583 return NULL; 584 } 585 586 if ((mDataPos+padded) <= mDataCapacity) { 587restart_write: 588 //printf("Writing %ld bytes, padded to %ld\n", len, padded); 589 uint8_t* const data = mData+mDataPos; 590 591 // Need to pad at end? 592 if (padded != len) { 593#if BYTE_ORDER == BIG_ENDIAN 594 static const uint32_t mask[4] = { 595 0x00000000, 0xffffff00, 0xffff0000, 0xff000000 596 }; 597#endif 598#if BYTE_ORDER == LITTLE_ENDIAN 599 static const uint32_t mask[4] = { 600 0x00000000, 0x00ffffff, 0x0000ffff, 0x000000ff 601 }; 602#endif 603 //printf("Applying pad mask: %p to %p\n", (void*)mask[padded-len], 604 // *reinterpret_cast<void**>(data+padded-4)); 605 *reinterpret_cast<uint32_t*>(data+padded-4) &= mask[padded-len]; 606 } 607 608 finishWrite(padded); 609 return data; 610 } 611 612 status_t err = growData(padded); 613 if (err == NO_ERROR) goto restart_write; 614 return NULL; 615} 616 617status_t Parcel::writeInt32(int32_t val) 618{ 619 return writeAligned(val); 620} 621status_t Parcel::writeInt32Array(size_t len, const int32_t *val) { 622 if (!val) { 623 return writeAligned(-1); 624 } 625 status_t ret = writeAligned(len); 626 if (ret == NO_ERROR) { 627 ret = write(val, len * sizeof(*val)); 628 } 629 return ret; 630} 631status_t Parcel::writeByteArray(size_t len, const uint8_t *val) { 632 if (!val) { 633 return writeAligned(-1); 634 } 635 status_t ret = writeAligned(len); 636 if (ret == NO_ERROR) { 637 ret = write(val, len * sizeof(*val)); 638 } 639 return ret; 640} 641 642status_t Parcel::writeInt64(int64_t val) 643{ 644 return writeAligned(val); 645} 646 647status_t Parcel::writeFloat(float val) 648{ 649 return writeAligned(val); 650} 651 652#if defined(__mips__) && defined(__mips_hard_float) 653 654status_t Parcel::writeDouble(double val) 655{ 656 union { 657 double d; 658 unsigned long long ll; 659 } u; 660 u.d = val; 661 return writeAligned(u.ll); 662} 663 664#else 665 666status_t Parcel::writeDouble(double val) 667{ 668 return writeAligned(val); 669} 670 671#endif 672 673status_t Parcel::writeIntPtr(intptr_t val) 674{ 675 return writeAligned(val); 676} 677 678status_t Parcel::writeCString(const char* str) 679{ 680 return write(str, strlen(str)+1); 681} 682 683status_t Parcel::writeString8(const String8& str) 684{ 685 status_t err = writeInt32(str.bytes()); 686 // only write string if its length is more than zero characters, 687 // as readString8 will only read if the length field is non-zero. 688 // this is slightly different from how writeString16 works. 689 if (str.bytes() > 0 && err == NO_ERROR) { 690 err = write(str.string(), str.bytes()+1); 691 } 692 return err; 693} 694 695status_t Parcel::writeString16(const String16& str) 696{ 697 return writeString16(str.string(), str.size()); 698} 699 700status_t Parcel::writeString16(const char16_t* str, size_t len) 701{ 702 if (str == NULL) return writeInt32(-1); 703 704 status_t err = writeInt32(len); 705 if (err == NO_ERROR) { 706 len *= sizeof(char16_t); 707 uint8_t* data = (uint8_t*)writeInplace(len+sizeof(char16_t)); 708 if (data) { 709 memcpy(data, str, len); 710 *reinterpret_cast<char16_t*>(data+len) = 0; 711 return NO_ERROR; 712 } 713 err = mError; 714 } 715 return err; 716} 717 718status_t Parcel::writeStrongBinder(const sp<IBinder>& val) 719{ 720 return flatten_binder(ProcessState::self(), val, this); 721} 722 723status_t Parcel::writeWeakBinder(const wp<IBinder>& val) 724{ 725 return flatten_binder(ProcessState::self(), val, this); 726} 727 728status_t Parcel::writeNativeHandle(const native_handle* handle) 729{ 730 if (!handle || handle->version != sizeof(native_handle)) 731 return BAD_TYPE; 732 733 status_t err; 734 err = writeInt32(handle->numFds); 735 if (err != NO_ERROR) return err; 736 737 err = writeInt32(handle->numInts); 738 if (err != NO_ERROR) return err; 739 740 for (int i=0 ; err==NO_ERROR && i<handle->numFds ; i++) 741 err = writeDupFileDescriptor(handle->data[i]); 742 743 if (err != NO_ERROR) { 744 ALOGD("write native handle, write dup fd failed"); 745 return err; 746 } 747 err = write(handle->data + handle->numFds, sizeof(int)*handle->numInts); 748 return err; 749} 750 751status_t Parcel::writeFileDescriptor(int fd, bool takeOwnership) 752{ 753 flat_binder_object obj; 754 obj.type = BINDER_TYPE_FD; 755 obj.flags = 0x7f | FLAT_BINDER_FLAG_ACCEPTS_FDS; 756 obj.handle = fd; 757 obj.cookie = (void*) (takeOwnership ? 1 : 0); 758 return writeObject(obj, true); 759} 760 761status_t Parcel::writeDupFileDescriptor(int fd) 762{ 763 int dupFd = dup(fd); 764 if (dupFd < 0) { 765 return -errno; 766 } 767 status_t err = writeFileDescriptor(dupFd, true /*takeOwnership*/); 768 if (err) { 769 close(dupFd); 770 } 771 return err; 772} 773 774status_t Parcel::writeBlob(size_t len, WritableBlob* outBlob) 775{ 776 status_t status; 777 778 if (!mAllowFds || len <= IN_PLACE_BLOB_LIMIT) { 779 ALOGV("writeBlob: write in place"); 780 status = writeInt32(0); 781 if (status) return status; 782 783 void* ptr = writeInplace(len); 784 if (!ptr) return NO_MEMORY; 785 786 outBlob->init(false /*mapped*/, ptr, len); 787 return NO_ERROR; 788 } 789 790 ALOGV("writeBlob: write to ashmem"); 791 int fd = ashmem_create_region("Parcel Blob", len); 792 if (fd < 0) return NO_MEMORY; 793 794 int result = ashmem_set_prot_region(fd, PROT_READ | PROT_WRITE); 795 if (result < 0) { 796 status = result; 797 } else { 798 void* ptr = ::mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); 799 if (ptr == MAP_FAILED) { 800 status = -errno; 801 } else { 802 result = ashmem_set_prot_region(fd, PROT_READ); 803 if (result < 0) { 804 status = result; 805 } else { 806 status = writeInt32(1); 807 if (!status) { 808 status = writeFileDescriptor(fd, true /*takeOwnership*/); 809 if (!status) { 810 outBlob->init(true /*mapped*/, ptr, len); 811 return NO_ERROR; 812 } 813 } 814 } 815 } 816 ::munmap(ptr, len); 817 } 818 ::close(fd); 819 return status; 820} 821 822status_t Parcel::write(const FlattenableHelperInterface& val) 823{ 824 status_t err; 825 826 // size if needed 827 const size_t len = val.getFlattenedSize(); 828 const size_t fd_count = val.getFdCount(); 829 830 err = this->writeInt32(len); 831 if (err) return err; 832 833 err = this->writeInt32(fd_count); 834 if (err) return err; 835 836 // payload 837 void* const buf = this->writeInplace(PAD_SIZE(len)); 838 if (buf == NULL) 839 return BAD_VALUE; 840 841 int* fds = NULL; 842 if (fd_count) { 843 fds = new int[fd_count]; 844 } 845 846 err = val.flatten(buf, len, fds, fd_count); 847 for (size_t i=0 ; i<fd_count && err==NO_ERROR ; i++) { 848 err = this->writeDupFileDescriptor( fds[i] ); 849 } 850 851 if (fd_count) { 852 delete [] fds; 853 } 854 855 return err; 856} 857 858status_t Parcel::writeObject(const flat_binder_object& val, bool nullMetaData) 859{ 860 const bool enoughData = (mDataPos+sizeof(val)) <= mDataCapacity; 861 const bool enoughObjects = mObjectsSize < mObjectsCapacity; 862 if (enoughData && enoughObjects) { 863restart_write: 864 *reinterpret_cast<flat_binder_object*>(mData+mDataPos) = val; 865 866 // Need to write meta-data? 867 if (nullMetaData || val.binder != NULL) { 868 mObjects[mObjectsSize] = mDataPos; 869 acquire_object(ProcessState::self(), val, this); 870 mObjectsSize++; 871 } 872 873 // remember if it's a file descriptor 874 if (val.type == BINDER_TYPE_FD) { 875 if (!mAllowFds) { 876 return FDS_NOT_ALLOWED; 877 } 878 mHasFds = mFdsKnown = true; 879 } 880 881 return finishWrite(sizeof(flat_binder_object)); 882 } 883 884 if (!enoughData) { 885 const status_t err = growData(sizeof(val)); 886 if (err != NO_ERROR) return err; 887 } 888 if (!enoughObjects) { 889 size_t newSize = ((mObjectsSize+2)*3)/2; 890 size_t* objects = (size_t*)realloc(mObjects, newSize*sizeof(size_t)); 891 if (objects == NULL) return NO_MEMORY; 892 mObjects = objects; 893 mObjectsCapacity = newSize; 894 } 895 896 goto restart_write; 897} 898 899status_t Parcel::writeNoException() 900{ 901 return writeInt32(0); 902} 903 904void Parcel::remove(size_t start, size_t amt) 905{ 906 LOG_ALWAYS_FATAL("Parcel::remove() not yet implemented!"); 907} 908 909status_t Parcel::read(void* outData, size_t len) const 910{ 911 if ((mDataPos+PAD_SIZE(len)) >= mDataPos && (mDataPos+PAD_SIZE(len)) <= mDataSize 912 && len <= PAD_SIZE(len)) { 913 memcpy(outData, mData+mDataPos, len); 914 mDataPos += PAD_SIZE(len); 915 ALOGV("read Setting data pos of %p to %d\n", this, mDataPos); 916 return NO_ERROR; 917 } 918 return NOT_ENOUGH_DATA; 919} 920 921const void* Parcel::readInplace(size_t len) const 922{ 923 if ((mDataPos+PAD_SIZE(len)) >= mDataPos && (mDataPos+PAD_SIZE(len)) <= mDataSize 924 && len <= PAD_SIZE(len)) { 925 const void* data = mData+mDataPos; 926 mDataPos += PAD_SIZE(len); 927 ALOGV("readInplace Setting data pos of %p to %d\n", this, mDataPos); 928 return data; 929 } 930 return NULL; 931} 932 933template<class T> 934status_t Parcel::readAligned(T *pArg) const { 935 COMPILE_TIME_ASSERT_FUNCTION_SCOPE(PAD_SIZE(sizeof(T)) == sizeof(T)); 936 937 if ((mDataPos+sizeof(T)) <= mDataSize) { 938 const void* data = mData+mDataPos; 939 mDataPos += sizeof(T); 940 *pArg = *reinterpret_cast<const T*>(data); 941 return NO_ERROR; 942 } else { 943 return NOT_ENOUGH_DATA; 944 } 945} 946 947template<class T> 948T Parcel::readAligned() const { 949 T result; 950 if (readAligned(&result) != NO_ERROR) { 951 result = 0; 952 } 953 954 return result; 955} 956 957template<class T> 958status_t Parcel::writeAligned(T val) { 959 COMPILE_TIME_ASSERT_FUNCTION_SCOPE(PAD_SIZE(sizeof(T)) == sizeof(T)); 960 961 if ((mDataPos+sizeof(val)) <= mDataCapacity) { 962restart_write: 963 *reinterpret_cast<T*>(mData+mDataPos) = val; 964 return finishWrite(sizeof(val)); 965 } 966 967 status_t err = growData(sizeof(val)); 968 if (err == NO_ERROR) goto restart_write; 969 return err; 970} 971 972status_t Parcel::readInt32(int32_t *pArg) const 973{ 974 return readAligned(pArg); 975} 976 977int32_t Parcel::readInt32() const 978{ 979 return readAligned<int32_t>(); 980} 981 982 983status_t Parcel::readInt64(int64_t *pArg) const 984{ 985 return readAligned(pArg); 986} 987 988 989int64_t Parcel::readInt64() const 990{ 991 return readAligned<int64_t>(); 992} 993 994status_t Parcel::readFloat(float *pArg) const 995{ 996 return readAligned(pArg); 997} 998 999 1000float Parcel::readFloat() const 1001{ 1002 return readAligned<float>(); 1003} 1004 1005#if defined(__mips__) && defined(__mips_hard_float) 1006 1007status_t Parcel::readDouble(double *pArg) const 1008{ 1009 union { 1010 double d; 1011 unsigned long long ll; 1012 } u; 1013 status_t status; 1014 status = readAligned(&u.ll); 1015 *pArg = u.d; 1016 return status; 1017} 1018 1019double Parcel::readDouble() const 1020{ 1021 union { 1022 double d; 1023 unsigned long long ll; 1024 } u; 1025 u.ll = readAligned<unsigned long long>(); 1026 return u.d; 1027} 1028 1029#else 1030 1031status_t Parcel::readDouble(double *pArg) const 1032{ 1033 return readAligned(pArg); 1034} 1035 1036double Parcel::readDouble() const 1037{ 1038 return readAligned<double>(); 1039} 1040 1041#endif 1042 1043status_t Parcel::readIntPtr(intptr_t *pArg) const 1044{ 1045 return readAligned(pArg); 1046} 1047 1048 1049intptr_t Parcel::readIntPtr() const 1050{ 1051 return readAligned<intptr_t>(); 1052} 1053 1054 1055const char* Parcel::readCString() const 1056{ 1057 const size_t avail = mDataSize-mDataPos; 1058 if (avail > 0) { 1059 const char* str = reinterpret_cast<const char*>(mData+mDataPos); 1060 // is the string's trailing NUL within the parcel's valid bounds? 1061 const char* eos = reinterpret_cast<const char*>(memchr(str, 0, avail)); 1062 if (eos) { 1063 const size_t len = eos - str; 1064 mDataPos += PAD_SIZE(len+1); 1065 ALOGV("readCString Setting data pos of %p to %d\n", this, mDataPos); 1066 return str; 1067 } 1068 } 1069 return NULL; 1070} 1071 1072String8 Parcel::readString8() const 1073{ 1074 int32_t size = readInt32(); 1075 // watch for potential int overflow adding 1 for trailing NUL 1076 if (size > 0 && size < INT32_MAX) { 1077 const char* str = (const char*)readInplace(size+1); 1078 if (str) return String8(str, size); 1079 } 1080 return String8(); 1081} 1082 1083String16 Parcel::readString16() const 1084{ 1085 size_t len; 1086 const char16_t* str = readString16Inplace(&len); 1087 if (str) return String16(str, len); 1088 ALOGE("Reading a NULL string not supported here."); 1089 return String16(); 1090} 1091 1092const char16_t* Parcel::readString16Inplace(size_t* outLen) const 1093{ 1094 int32_t size = readInt32(); 1095 // watch for potential int overflow from size+1 1096 if (size >= 0 && size < INT32_MAX) { 1097 *outLen = size; 1098 const char16_t* str = (const char16_t*)readInplace((size+1)*sizeof(char16_t)); 1099 if (str != NULL) { 1100 return str; 1101 } 1102 } 1103 *outLen = 0; 1104 return NULL; 1105} 1106 1107sp<IBinder> Parcel::readStrongBinder() const 1108{ 1109 sp<IBinder> val; 1110 unflatten_binder(ProcessState::self(), *this, &val); 1111 return val; 1112} 1113 1114wp<IBinder> Parcel::readWeakBinder() const 1115{ 1116 wp<IBinder> val; 1117 unflatten_binder(ProcessState::self(), *this, &val); 1118 return val; 1119} 1120 1121int32_t Parcel::readExceptionCode() const 1122{ 1123 int32_t exception_code = readAligned<int32_t>(); 1124 if (exception_code == EX_HAS_REPLY_HEADER) { 1125 int32_t header_start = dataPosition(); 1126 int32_t header_size = readAligned<int32_t>(); 1127 // Skip over fat responses headers. Not used (or propagated) in 1128 // native code 1129 setDataPosition(header_start + header_size); 1130 // And fat response headers are currently only used when there are no 1131 // exceptions, so return no error: 1132 return 0; 1133 } 1134 return exception_code; 1135} 1136 1137native_handle* Parcel::readNativeHandle() const 1138{ 1139 int numFds, numInts; 1140 status_t err; 1141 err = readInt32(&numFds); 1142 if (err != NO_ERROR) return 0; 1143 err = readInt32(&numInts); 1144 if (err != NO_ERROR) return 0; 1145 1146 native_handle* h = native_handle_create(numFds, numInts); 1147 if (!h) { 1148 return 0; 1149 } 1150 1151 for (int i=0 ; err==NO_ERROR && i<numFds ; i++) { 1152 h->data[i] = dup(readFileDescriptor()); 1153 if (h->data[i] < 0) err = BAD_VALUE; 1154 } 1155 err = read(h->data + numFds, sizeof(int)*numInts); 1156 if (err != NO_ERROR) { 1157 native_handle_close(h); 1158 native_handle_delete(h); 1159 h = 0; 1160 } 1161 return h; 1162} 1163 1164 1165int Parcel::readFileDescriptor() const 1166{ 1167 const flat_binder_object* flat = readObject(true); 1168 if (flat) { 1169 switch (flat->type) { 1170 case BINDER_TYPE_FD: 1171 //ALOGI("Returning file descriptor %ld from parcel %p\n", flat->handle, this); 1172 return flat->handle; 1173 } 1174 } 1175 return BAD_TYPE; 1176} 1177 1178status_t Parcel::readBlob(size_t len, ReadableBlob* outBlob) const 1179{ 1180 int32_t useAshmem; 1181 status_t status = readInt32(&useAshmem); 1182 if (status) return status; 1183 1184 if (!useAshmem) { 1185 ALOGV("readBlob: read in place"); 1186 const void* ptr = readInplace(len); 1187 if (!ptr) return BAD_VALUE; 1188 1189 outBlob->init(false /*mapped*/, const_cast<void*>(ptr), len); 1190 return NO_ERROR; 1191 } 1192 1193 ALOGV("readBlob: read from ashmem"); 1194 int fd = readFileDescriptor(); 1195 if (fd == int(BAD_TYPE)) return BAD_VALUE; 1196 1197 void* ptr = ::mmap(NULL, len, PROT_READ, MAP_SHARED, fd, 0); 1198 if (!ptr) return NO_MEMORY; 1199 1200 outBlob->init(true /*mapped*/, ptr, len); 1201 return NO_ERROR; 1202} 1203 1204status_t Parcel::read(FlattenableHelperInterface& val) const 1205{ 1206 // size 1207 const size_t len = this->readInt32(); 1208 const size_t fd_count = this->readInt32(); 1209 1210 // payload 1211 void const* const buf = this->readInplace(PAD_SIZE(len)); 1212 if (buf == NULL) 1213 return BAD_VALUE; 1214 1215 int* fds = NULL; 1216 if (fd_count) { 1217 fds = new int[fd_count]; 1218 } 1219 1220 status_t err = NO_ERROR; 1221 for (size_t i=0 ; i<fd_count && err==NO_ERROR ; i++) { 1222 fds[i] = dup(this->readFileDescriptor()); 1223 if (fds[i] < 0) err = BAD_VALUE; 1224 } 1225 1226 if (err == NO_ERROR) { 1227 err = val.unflatten(buf, len, fds, fd_count); 1228 } 1229 1230 if (fd_count) { 1231 delete [] fds; 1232 } 1233 1234 return err; 1235} 1236const flat_binder_object* Parcel::readObject(bool nullMetaData) const 1237{ 1238 const size_t DPOS = mDataPos; 1239 if ((DPOS+sizeof(flat_binder_object)) <= mDataSize) { 1240 const flat_binder_object* obj 1241 = reinterpret_cast<const flat_binder_object*>(mData+DPOS); 1242 mDataPos = DPOS + sizeof(flat_binder_object); 1243 if (!nullMetaData && (obj->cookie == NULL && obj->binder == NULL)) { 1244 // When transferring a NULL object, we don't write it into 1245 // the object list, so we don't want to check for it when 1246 // reading. 1247 ALOGV("readObject Setting data pos of %p to %d\n", this, mDataPos); 1248 return obj; 1249 } 1250 1251 // Ensure that this object is valid... 1252 size_t* const OBJS = mObjects; 1253 const size_t N = mObjectsSize; 1254 size_t opos = mNextObjectHint; 1255 1256 if (N > 0) { 1257 ALOGV("Parcel %p looking for obj at %d, hint=%d\n", 1258 this, DPOS, opos); 1259 1260 // Start at the current hint position, looking for an object at 1261 // the current data position. 1262 if (opos < N) { 1263 while (opos < (N-1) && OBJS[opos] < DPOS) { 1264 opos++; 1265 } 1266 } else { 1267 opos = N-1; 1268 } 1269 if (OBJS[opos] == DPOS) { 1270 // Found it! 1271 ALOGV("Parcel found obj %d at index %d with forward search", 1272 this, DPOS, opos); 1273 mNextObjectHint = opos+1; 1274 ALOGV("readObject Setting data pos of %p to %d\n", this, mDataPos); 1275 return obj; 1276 } 1277 1278 // Look backwards for it... 1279 while (opos > 0 && OBJS[opos] > DPOS) { 1280 opos--; 1281 } 1282 if (OBJS[opos] == DPOS) { 1283 // Found it! 1284 ALOGV("Parcel found obj %d at index %d with backward search", 1285 this, DPOS, opos); 1286 mNextObjectHint = opos+1; 1287 ALOGV("readObject Setting data pos of %p to %d\n", this, mDataPos); 1288 return obj; 1289 } 1290 } 1291 ALOGW("Attempt to read object from Parcel %p at offset %d that is not in the object list", 1292 this, DPOS); 1293 } 1294 return NULL; 1295} 1296 1297void Parcel::closeFileDescriptors() 1298{ 1299 size_t i = mObjectsSize; 1300 if (i > 0) { 1301 //ALOGI("Closing file descriptors for %d objects...", mObjectsSize); 1302 } 1303 while (i > 0) { 1304 i--; 1305 const flat_binder_object* flat 1306 = reinterpret_cast<flat_binder_object*>(mData+mObjects[i]); 1307 if (flat->type == BINDER_TYPE_FD) { 1308 //ALOGI("Closing fd: %ld\n", flat->handle); 1309 close(flat->handle); 1310 } 1311 } 1312} 1313 1314const uint8_t* Parcel::ipcData() const 1315{ 1316 return mData; 1317} 1318 1319size_t Parcel::ipcDataSize() const 1320{ 1321 return (mDataSize > mDataPos ? mDataSize : mDataPos); 1322} 1323 1324const size_t* Parcel::ipcObjects() const 1325{ 1326 return mObjects; 1327} 1328 1329size_t Parcel::ipcObjectsCount() const 1330{ 1331 return mObjectsSize; 1332} 1333 1334void Parcel::ipcSetDataReference(const uint8_t* data, size_t dataSize, 1335 const size_t* objects, size_t objectsCount, release_func relFunc, void* relCookie) 1336{ 1337 size_t minOffset = 0; 1338 freeDataNoInit(); 1339 mError = NO_ERROR; 1340 mData = const_cast<uint8_t*>(data); 1341 mDataSize = mDataCapacity = dataSize; 1342 //ALOGI("setDataReference Setting data size of %p to %lu (pid=%d)\n", this, mDataSize, getpid()); 1343 mDataPos = 0; 1344 ALOGV("setDataReference Setting data pos of %p to %d\n", this, mDataPos); 1345 mObjects = const_cast<size_t*>(objects); 1346 mObjectsSize = mObjectsCapacity = objectsCount; 1347 mNextObjectHint = 0; 1348 mOwner = relFunc; 1349 mOwnerCookie = relCookie; 1350 for (size_t i = 0; i < mObjectsSize; i++) { 1351 size_t offset = mObjects[i]; 1352 if (offset < minOffset) { 1353 ALOGE("%s: bad object offset %zu < %zu\n", 1354 __func__, offset, minOffset); 1355 mObjectsSize = 0; 1356 break; 1357 } 1358 minOffset = offset + sizeof(flat_binder_object); 1359 } 1360 scanForFds(); 1361} 1362 1363void Parcel::print(TextOutput& to, uint32_t flags) const 1364{ 1365 to << "Parcel("; 1366 1367 if (errorCheck() != NO_ERROR) { 1368 const status_t err = errorCheck(); 1369 to << "Error: " << (void*)err << " \"" << strerror(-err) << "\""; 1370 } else if (dataSize() > 0) { 1371 const uint8_t* DATA = data(); 1372 to << indent << HexDump(DATA, dataSize()) << dedent; 1373 const size_t* OBJS = objects(); 1374 const size_t N = objectsCount(); 1375 for (size_t i=0; i<N; i++) { 1376 const flat_binder_object* flat 1377 = reinterpret_cast<const flat_binder_object*>(DATA+OBJS[i]); 1378 to << endl << "Object #" << i << " @ " << (void*)OBJS[i] << ": " 1379 << TypeCode(flat->type & 0x7f7f7f00) 1380 << " = " << flat->binder; 1381 } 1382 } else { 1383 to << "NULL"; 1384 } 1385 1386 to << ")"; 1387} 1388 1389void Parcel::releaseObjects() 1390{ 1391 const sp<ProcessState> proc(ProcessState::self()); 1392 size_t i = mObjectsSize; 1393 uint8_t* const data = mData; 1394 size_t* const objects = mObjects; 1395 while (i > 0) { 1396 i--; 1397 const flat_binder_object* flat 1398 = reinterpret_cast<flat_binder_object*>(data+objects[i]); 1399 release_object(proc, *flat, this); 1400 } 1401} 1402 1403void Parcel::acquireObjects() 1404{ 1405 const sp<ProcessState> proc(ProcessState::self()); 1406 size_t i = mObjectsSize; 1407 uint8_t* const data = mData; 1408 size_t* const objects = mObjects; 1409 while (i > 0) { 1410 i--; 1411 const flat_binder_object* flat 1412 = reinterpret_cast<flat_binder_object*>(data+objects[i]); 1413 acquire_object(proc, *flat, this); 1414 } 1415} 1416 1417void Parcel::freeData() 1418{ 1419 freeDataNoInit(); 1420 initState(); 1421} 1422 1423void Parcel::freeDataNoInit() 1424{ 1425 if (mOwner) { 1426 //ALOGI("Freeing data ref of %p (pid=%d)\n", this, getpid()); 1427 mOwner(this, mData, mDataSize, mObjects, mObjectsSize, mOwnerCookie); 1428 } else { 1429 releaseObjects(); 1430 if (mData) free(mData); 1431 if (mObjects) free(mObjects); 1432 } 1433} 1434 1435status_t Parcel::growData(size_t len) 1436{ 1437 size_t newSize = ((mDataSize+len)*3)/2; 1438 return (newSize <= mDataSize) 1439 ? (status_t) NO_MEMORY 1440 : continueWrite(newSize); 1441} 1442 1443status_t Parcel::restartWrite(size_t desired) 1444{ 1445 if (mOwner) { 1446 freeData(); 1447 return continueWrite(desired); 1448 } 1449 1450 uint8_t* data = (uint8_t*)realloc(mData, desired); 1451 if (!data && desired > mDataCapacity) { 1452 mError = NO_MEMORY; 1453 return NO_MEMORY; 1454 } 1455 1456 releaseObjects(); 1457 1458 if (data) { 1459 mData = data; 1460 mDataCapacity = desired; 1461 } 1462 1463 mDataSize = mDataPos = 0; 1464 ALOGV("restartWrite Setting data size of %p to %d\n", this, mDataSize); 1465 ALOGV("restartWrite Setting data pos of %p to %d\n", this, mDataPos); 1466 1467 free(mObjects); 1468 mObjects = NULL; 1469 mObjectsSize = mObjectsCapacity = 0; 1470 mNextObjectHint = 0; 1471 mHasFds = false; 1472 mFdsKnown = true; 1473 mAllowFds = true; 1474 1475 return NO_ERROR; 1476} 1477 1478status_t Parcel::continueWrite(size_t desired) 1479{ 1480 // If shrinking, first adjust for any objects that appear 1481 // after the new data size. 1482 size_t objectsSize = mObjectsSize; 1483 if (desired < mDataSize) { 1484 if (desired == 0) { 1485 objectsSize = 0; 1486 } else { 1487 while (objectsSize > 0) { 1488 if (mObjects[objectsSize-1] < desired) 1489 break; 1490 objectsSize--; 1491 } 1492 } 1493 } 1494 1495 if (mOwner) { 1496 // If the size is going to zero, just release the owner's data. 1497 if (desired == 0) { 1498 freeData(); 1499 return NO_ERROR; 1500 } 1501 1502 // If there is a different owner, we need to take 1503 // posession. 1504 uint8_t* data = (uint8_t*)malloc(desired); 1505 if (!data) { 1506 mError = NO_MEMORY; 1507 return NO_MEMORY; 1508 } 1509 size_t* objects = NULL; 1510 1511 if (objectsSize) { 1512 objects = (size_t*)malloc(objectsSize*sizeof(size_t)); 1513 if (!objects) { 1514 free(data); 1515 1516 mError = NO_MEMORY; 1517 return NO_MEMORY; 1518 } 1519 1520 // Little hack to only acquire references on objects 1521 // we will be keeping. 1522 size_t oldObjectsSize = mObjectsSize; 1523 mObjectsSize = objectsSize; 1524 acquireObjects(); 1525 mObjectsSize = oldObjectsSize; 1526 } 1527 1528 if (mData) { 1529 memcpy(data, mData, mDataSize < desired ? mDataSize : desired); 1530 } 1531 if (objects && mObjects) { 1532 memcpy(objects, mObjects, objectsSize*sizeof(size_t)); 1533 } 1534 //ALOGI("Freeing data ref of %p (pid=%d)\n", this, getpid()); 1535 mOwner(this, mData, mDataSize, mObjects, mObjectsSize, mOwnerCookie); 1536 mOwner = NULL; 1537 1538 mData = data; 1539 mObjects = objects; 1540 mDataSize = (mDataSize < desired) ? mDataSize : desired; 1541 ALOGV("continueWrite Setting data size of %p to %d\n", this, mDataSize); 1542 mDataCapacity = desired; 1543 mObjectsSize = mObjectsCapacity = objectsSize; 1544 mNextObjectHint = 0; 1545 1546 } else if (mData) { 1547 if (objectsSize < mObjectsSize) { 1548 // Need to release refs on any objects we are dropping. 1549 const sp<ProcessState> proc(ProcessState::self()); 1550 for (size_t i=objectsSize; i<mObjectsSize; i++) { 1551 const flat_binder_object* flat 1552 = reinterpret_cast<flat_binder_object*>(mData+mObjects[i]); 1553 if (flat->type == BINDER_TYPE_FD) { 1554 // will need to rescan because we may have lopped off the only FDs 1555 mFdsKnown = false; 1556 } 1557 release_object(proc, *flat, this); 1558 } 1559 size_t* objects = 1560 (size_t*)realloc(mObjects, objectsSize*sizeof(size_t)); 1561 if (objects) { 1562 mObjects = objects; 1563 } 1564 mObjectsSize = objectsSize; 1565 mNextObjectHint = 0; 1566 } 1567 1568 // We own the data, so we can just do a realloc(). 1569 if (desired > mDataCapacity) { 1570 uint8_t* data = (uint8_t*)realloc(mData, desired); 1571 if (data) { 1572 mData = data; 1573 mDataCapacity = desired; 1574 } else if (desired > mDataCapacity) { 1575 mError = NO_MEMORY; 1576 return NO_MEMORY; 1577 } 1578 } else { 1579 if (mDataSize > desired) { 1580 mDataSize = desired; 1581 ALOGV("continueWrite Setting data size of %p to %d\n", this, mDataSize); 1582 } 1583 if (mDataPos > desired) { 1584 mDataPos = desired; 1585 ALOGV("continueWrite Setting data pos of %p to %d\n", this, mDataPos); 1586 } 1587 } 1588 1589 } else { 1590 // This is the first data. Easy! 1591 uint8_t* data = (uint8_t*)malloc(desired); 1592 if (!data) { 1593 mError = NO_MEMORY; 1594 return NO_MEMORY; 1595 } 1596 1597 if(!(mDataCapacity == 0 && mObjects == NULL 1598 && mObjectsCapacity == 0)) { 1599 ALOGE("continueWrite: %d/%p/%d/%d", mDataCapacity, mObjects, mObjectsCapacity, desired); 1600 } 1601 1602 mData = data; 1603 mDataSize = mDataPos = 0; 1604 ALOGV("continueWrite Setting data size of %p to %d\n", this, mDataSize); 1605 ALOGV("continueWrite Setting data pos of %p to %d\n", this, mDataPos); 1606 mDataCapacity = desired; 1607 } 1608 1609 return NO_ERROR; 1610} 1611 1612void Parcel::initState() 1613{ 1614 mError = NO_ERROR; 1615 mData = 0; 1616 mDataSize = 0; 1617 mDataCapacity = 0; 1618 mDataPos = 0; 1619 ALOGV("initState Setting data size of %p to %d\n", this, mDataSize); 1620 ALOGV("initState Setting data pos of %p to %d\n", this, mDataPos); 1621 mObjects = NULL; 1622 mObjectsSize = 0; 1623 mObjectsCapacity = 0; 1624 mNextObjectHint = 0; 1625 mHasFds = false; 1626 mFdsKnown = true; 1627 mAllowFds = true; 1628 mOwner = NULL; 1629} 1630 1631void Parcel::scanForFds() const 1632{ 1633 bool hasFds = false; 1634 for (size_t i=0; i<mObjectsSize; i++) { 1635 const flat_binder_object* flat 1636 = reinterpret_cast<const flat_binder_object*>(mData + mObjects[i]); 1637 if (flat->type == BINDER_TYPE_FD) { 1638 hasFds = true; 1639 break; 1640 } 1641 } 1642 mHasFds = hasFds; 1643 mFdsKnown = true; 1644} 1645 1646// --- Parcel::Blob --- 1647 1648Parcel::Blob::Blob() : 1649 mMapped(false), mData(NULL), mSize(0) { 1650} 1651 1652Parcel::Blob::~Blob() { 1653 release(); 1654} 1655 1656void Parcel::Blob::release() { 1657 if (mMapped && mData) { 1658 ::munmap(mData, mSize); 1659 } 1660 clear(); 1661} 1662 1663void Parcel::Blob::init(bool mapped, void* data, size_t size) { 1664 mMapped = mapped; 1665 mData = data; 1666 mSize = size; 1667} 1668 1669void Parcel::Blob::clear() { 1670 mMapped = false; 1671 mData = NULL; 1672 mSize = 0; 1673} 1674 1675}; // namespace android 1676