Parcel.cpp revision eea5b2984204a9da2a59a8092a4191a33c8e7640
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 reinterpret_cast<IBinder*>(obj.cookie)->incStrong(who); 82 } 83 return; 84 case BINDER_TYPE_WEAK_BINDER: 85 if (obj.binder) 86 reinterpret_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 reinterpret_cast<IBinder*>(obj.cookie)->decStrong(who); 119 } 120 return; 121 case BINDER_TYPE_WEAK_BINDER: 122 if (obj.binder) 123 reinterpret_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 != 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 = 0; 170 } else { 171 obj.type = BINDER_TYPE_BINDER; 172 obj.binder = reinterpret_cast<uintptr_t>(local->getWeakRefs()); 173 obj.cookie = reinterpret_cast<uintptr_t>(local); 174 } 175 } else { 176 obj.type = BINDER_TYPE_BINDER; 177 obj.binder = 0; 178 obj.cookie = 0; 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 = 0; 203 } else { 204 obj.type = BINDER_TYPE_WEAK_BINDER; 205 obj.binder = reinterpret_cast<uintptr_t>(binder.get_refs()); 206 obj.cookie = reinterpret_cast<uintptr_t>(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 = 0; 221 obj.cookie = 0; 222 return finish_flatten_binder(NULL, obj, out); 223 224 } else { 225 obj.type = BINDER_TYPE_BINDER; 226 obj.binder = 0; 227 obj.cookie = 0; 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 = reinterpret_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 = reinterpret_cast<IBinder*>(flat->cookie); 266 return finish_unflatten_binder(NULL, *flat, in); 267 case BINDER_TYPE_WEAK_BINDER: 268 if (flat->binder != 0) { 269 out->set_object_and_refs( 270 reinterpret_cast<IBinder*>(flat->cookie), 271 reinterpret_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 binder_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 binder_size_t *objects = 416 (binder_size_t*)realloc(mObjects, newSize*sizeof(binder_size_t)); 417 if (objects == (binder_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 = 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 binder_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} 631 632status_t Parcel::writeInt64(int64_t val) 633{ 634 return writeAligned(val); 635} 636 637status_t Parcel::writePointer(uintptr_t val) 638{ 639 return writeAligned<binder_uintptr_t>(val); 640} 641 642status_t Parcel::writeFloat(float val) 643{ 644 return writeAligned(val); 645} 646 647#if defined(__mips__) && defined(__mips_hard_float) 648 649status_t Parcel::writeDouble(double val) 650{ 651 union { 652 double d; 653 unsigned long long ll; 654 } u; 655 u.d = val; 656 return writeAligned(u.ll); 657} 658 659#else 660 661status_t Parcel::writeDouble(double val) 662{ 663 return writeAligned(val); 664} 665 666#endif 667 668status_t Parcel::writeIntPtr(intptr_t val) 669{ 670 return writeAligned(val); 671} 672 673status_t Parcel::writeCString(const char* str) 674{ 675 return write(str, strlen(str)+1); 676} 677 678status_t Parcel::writeString8(const String8& str) 679{ 680 status_t err = writeInt32(str.bytes()); 681 // only write string if its length is more than zero characters, 682 // as readString8 will only read if the length field is non-zero. 683 // this is slightly different from how writeString16 works. 684 if (str.bytes() > 0 && err == NO_ERROR) { 685 err = write(str.string(), str.bytes()+1); 686 } 687 return err; 688} 689 690status_t Parcel::writeString16(const String16& str) 691{ 692 return writeString16(str.string(), str.size()); 693} 694 695status_t Parcel::writeString16(const char16_t* str, size_t len) 696{ 697 if (str == NULL) return writeInt32(-1); 698 699 status_t err = writeInt32(len); 700 if (err == NO_ERROR) { 701 len *= sizeof(char16_t); 702 uint8_t* data = (uint8_t*)writeInplace(len+sizeof(char16_t)); 703 if (data) { 704 memcpy(data, str, len); 705 *reinterpret_cast<char16_t*>(data+len) = 0; 706 return NO_ERROR; 707 } 708 err = mError; 709 } 710 return err; 711} 712 713status_t Parcel::writeStrongBinder(const sp<IBinder>& val) 714{ 715 return flatten_binder(ProcessState::self(), val, this); 716} 717 718status_t Parcel::writeWeakBinder(const wp<IBinder>& val) 719{ 720 return flatten_binder(ProcessState::self(), val, this); 721} 722 723status_t Parcel::writeNativeHandle(const native_handle* handle) 724{ 725 if (!handle || handle->version != sizeof(native_handle)) 726 return BAD_TYPE; 727 728 status_t err; 729 err = writeInt32(handle->numFds); 730 if (err != NO_ERROR) return err; 731 732 err = writeInt32(handle->numInts); 733 if (err != NO_ERROR) return err; 734 735 for (int i=0 ; err==NO_ERROR && i<handle->numFds ; i++) 736 err = writeDupFileDescriptor(handle->data[i]); 737 738 if (err != NO_ERROR) { 739 ALOGD("write native handle, write dup fd failed"); 740 return err; 741 } 742 err = write(handle->data + handle->numFds, sizeof(int)*handle->numInts); 743 return err; 744} 745 746status_t Parcel::writeFileDescriptor(int fd, bool takeOwnership) 747{ 748 flat_binder_object obj; 749 obj.type = BINDER_TYPE_FD; 750 obj.flags = 0x7f | FLAT_BINDER_FLAG_ACCEPTS_FDS; 751 obj.handle = fd; 752 obj.cookie = takeOwnership ? 1 : 0; 753 return writeObject(obj, true); 754} 755 756status_t Parcel::writeDupFileDescriptor(int fd) 757{ 758 int dupFd = dup(fd); 759 if (dupFd < 0) { 760 return -errno; 761 } 762 status_t err = writeFileDescriptor(dupFd, true /*takeOwnership*/); 763 if (err) { 764 close(dupFd); 765 } 766 return err; 767} 768 769status_t Parcel::writeBlob(size_t len, WritableBlob* outBlob) 770{ 771 status_t status; 772 773 if (!mAllowFds || len <= IN_PLACE_BLOB_LIMIT) { 774 ALOGV("writeBlob: write in place"); 775 status = writeInt32(0); 776 if (status) return status; 777 778 void* ptr = writeInplace(len); 779 if (!ptr) return NO_MEMORY; 780 781 outBlob->init(false /*mapped*/, ptr, len); 782 return NO_ERROR; 783 } 784 785 ALOGV("writeBlob: write to ashmem"); 786 int fd = ashmem_create_region("Parcel Blob", len); 787 if (fd < 0) return NO_MEMORY; 788 789 int result = ashmem_set_prot_region(fd, PROT_READ | PROT_WRITE); 790 if (result < 0) { 791 status = result; 792 } else { 793 void* ptr = ::mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); 794 if (ptr == MAP_FAILED) { 795 status = -errno; 796 } else { 797 result = ashmem_set_prot_region(fd, PROT_READ); 798 if (result < 0) { 799 status = result; 800 } else { 801 status = writeInt32(1); 802 if (!status) { 803 status = writeFileDescriptor(fd, true /*takeOwnership*/); 804 if (!status) { 805 outBlob->init(true /*mapped*/, ptr, len); 806 return NO_ERROR; 807 } 808 } 809 } 810 } 811 ::munmap(ptr, len); 812 } 813 ::close(fd); 814 return status; 815} 816 817status_t Parcel::write(const FlattenableHelperInterface& val) 818{ 819 status_t err; 820 821 // size if needed 822 const size_t len = val.getFlattenedSize(); 823 const size_t fd_count = val.getFdCount(); 824 825 err = this->writeInt32(len); 826 if (err) return err; 827 828 err = this->writeInt32(fd_count); 829 if (err) return err; 830 831 // payload 832 void* const buf = this->writeInplace(PAD_SIZE(len)); 833 if (buf == NULL) 834 return BAD_VALUE; 835 836 int* fds = NULL; 837 if (fd_count) { 838 fds = new int[fd_count]; 839 } 840 841 err = val.flatten(buf, len, fds, fd_count); 842 for (size_t i=0 ; i<fd_count && err==NO_ERROR ; i++) { 843 err = this->writeDupFileDescriptor( fds[i] ); 844 } 845 846 if (fd_count) { 847 delete [] fds; 848 } 849 850 return err; 851} 852 853status_t Parcel::writeObject(const flat_binder_object& val, bool nullMetaData) 854{ 855 const bool enoughData = (mDataPos+sizeof(val)) <= mDataCapacity; 856 const bool enoughObjects = mObjectsSize < mObjectsCapacity; 857 if (enoughData && enoughObjects) { 858restart_write: 859 *reinterpret_cast<flat_binder_object*>(mData+mDataPos) = val; 860 861 // Need to write meta-data? 862 if (nullMetaData || val.binder != 0) { 863 mObjects[mObjectsSize] = mDataPos; 864 acquire_object(ProcessState::self(), val, this); 865 mObjectsSize++; 866 } 867 868 // remember if it's a file descriptor 869 if (val.type == BINDER_TYPE_FD) { 870 if (!mAllowFds) { 871 return FDS_NOT_ALLOWED; 872 } 873 mHasFds = mFdsKnown = true; 874 } 875 876 return finishWrite(sizeof(flat_binder_object)); 877 } 878 879 if (!enoughData) { 880 const status_t err = growData(sizeof(val)); 881 if (err != NO_ERROR) return err; 882 } 883 if (!enoughObjects) { 884 size_t newSize = ((mObjectsSize+2)*3)/2; 885 binder_size_t* objects = (binder_size_t*)realloc(mObjects, newSize*sizeof(binder_size_t)); 886 if (objects == NULL) return NO_MEMORY; 887 mObjects = objects; 888 mObjectsCapacity = newSize; 889 } 890 891 goto restart_write; 892} 893 894status_t Parcel::writeNoException() 895{ 896 return writeInt32(0); 897} 898 899void Parcel::remove(size_t start, size_t amt) 900{ 901 LOG_ALWAYS_FATAL("Parcel::remove() not yet implemented!"); 902} 903 904status_t Parcel::read(void* outData, size_t len) const 905{ 906 if ((mDataPos+PAD_SIZE(len)) >= mDataPos && (mDataPos+PAD_SIZE(len)) <= mDataSize) { 907 memcpy(outData, mData+mDataPos, len); 908 mDataPos += PAD_SIZE(len); 909 ALOGV("read Setting data pos of %p to %d\n", this, mDataPos); 910 return NO_ERROR; 911 } 912 return NOT_ENOUGH_DATA; 913} 914 915const void* Parcel::readInplace(size_t len) const 916{ 917 if ((mDataPos+PAD_SIZE(len)) >= mDataPos && (mDataPos+PAD_SIZE(len)) <= mDataSize) { 918 const void* data = mData+mDataPos; 919 mDataPos += PAD_SIZE(len); 920 ALOGV("readInplace Setting data pos of %p to %d\n", this, mDataPos); 921 return data; 922 } 923 return NULL; 924} 925 926template<class T> 927status_t Parcel::readAligned(T *pArg) const { 928 COMPILE_TIME_ASSERT_FUNCTION_SCOPE(PAD_SIZE(sizeof(T)) == sizeof(T)); 929 930 if ((mDataPos+sizeof(T)) <= mDataSize) { 931 const void* data = mData+mDataPos; 932 mDataPos += sizeof(T); 933 *pArg = *reinterpret_cast<const T*>(data); 934 return NO_ERROR; 935 } else { 936 return NOT_ENOUGH_DATA; 937 } 938} 939 940template<class T> 941T Parcel::readAligned() const { 942 T result; 943 if (readAligned(&result) != NO_ERROR) { 944 result = 0; 945 } 946 947 return result; 948} 949 950template<class T> 951status_t Parcel::writeAligned(T val) { 952 COMPILE_TIME_ASSERT_FUNCTION_SCOPE(PAD_SIZE(sizeof(T)) == sizeof(T)); 953 954 if ((mDataPos+sizeof(val)) <= mDataCapacity) { 955restart_write: 956 *reinterpret_cast<T*>(mData+mDataPos) = val; 957 return finishWrite(sizeof(val)); 958 } 959 960 status_t err = growData(sizeof(val)); 961 if (err == NO_ERROR) goto restart_write; 962 return err; 963} 964 965status_t Parcel::readInt32(int32_t *pArg) const 966{ 967 return readAligned(pArg); 968} 969 970int32_t Parcel::readInt32() const 971{ 972 return readAligned<int32_t>(); 973} 974 975 976status_t Parcel::readInt64(int64_t *pArg) const 977{ 978 return readAligned(pArg); 979} 980 981 982int64_t Parcel::readInt64() const 983{ 984 return readAligned<int64_t>(); 985} 986 987status_t Parcel::readPointer(uintptr_t *pArg) const 988{ 989 status_t ret; 990 binder_uintptr_t ptr; 991 ret = readAligned(&ptr); 992 if (!ret) 993 *pArg = ptr; 994 return ret; 995} 996 997uintptr_t Parcel::readPointer() const 998{ 999 return readAligned<binder_uintptr_t>(); 1000} 1001 1002 1003status_t Parcel::readFloat(float *pArg) const 1004{ 1005 return readAligned(pArg); 1006} 1007 1008 1009float Parcel::readFloat() const 1010{ 1011 return readAligned<float>(); 1012} 1013 1014#if defined(__mips__) && defined(__mips_hard_float) 1015 1016status_t Parcel::readDouble(double *pArg) const 1017{ 1018 union { 1019 double d; 1020 unsigned long long ll; 1021 } u; 1022 status_t status; 1023 status = readAligned(&u.ll); 1024 *pArg = u.d; 1025 return status; 1026} 1027 1028double Parcel::readDouble() const 1029{ 1030 union { 1031 double d; 1032 unsigned long long ll; 1033 } u; 1034 u.ll = readAligned<unsigned long long>(); 1035 return u.d; 1036} 1037 1038#else 1039 1040status_t Parcel::readDouble(double *pArg) const 1041{ 1042 return readAligned(pArg); 1043} 1044 1045double Parcel::readDouble() const 1046{ 1047 return readAligned<double>(); 1048} 1049 1050#endif 1051 1052status_t Parcel::readIntPtr(intptr_t *pArg) const 1053{ 1054 return readAligned(pArg); 1055} 1056 1057 1058intptr_t Parcel::readIntPtr() const 1059{ 1060 return readAligned<intptr_t>(); 1061} 1062 1063 1064const char* Parcel::readCString() const 1065{ 1066 const size_t avail = mDataSize-mDataPos; 1067 if (avail > 0) { 1068 const char* str = reinterpret_cast<const char*>(mData+mDataPos); 1069 // is the string's trailing NUL within the parcel's valid bounds? 1070 const char* eos = reinterpret_cast<const char*>(memchr(str, 0, avail)); 1071 if (eos) { 1072 const size_t len = eos - str; 1073 mDataPos += PAD_SIZE(len+1); 1074 ALOGV("readCString Setting data pos of %p to %d\n", this, mDataPos); 1075 return str; 1076 } 1077 } 1078 return NULL; 1079} 1080 1081String8 Parcel::readString8() const 1082{ 1083 int32_t size = readInt32(); 1084 // watch for potential int overflow adding 1 for trailing NUL 1085 if (size > 0 && size < INT32_MAX) { 1086 const char* str = (const char*)readInplace(size+1); 1087 if (str) return String8(str, size); 1088 } 1089 return String8(); 1090} 1091 1092String16 Parcel::readString16() const 1093{ 1094 size_t len; 1095 const char16_t* str = readString16Inplace(&len); 1096 if (str) return String16(str, len); 1097 ALOGE("Reading a NULL string not supported here."); 1098 return String16(); 1099} 1100 1101const char16_t* Parcel::readString16Inplace(size_t* outLen) const 1102{ 1103 int32_t size = readInt32(); 1104 // watch for potential int overflow from size+1 1105 if (size >= 0 && size < INT32_MAX) { 1106 *outLen = size; 1107 const char16_t* str = (const char16_t*)readInplace((size+1)*sizeof(char16_t)); 1108 if (str != NULL) { 1109 return str; 1110 } 1111 } 1112 *outLen = 0; 1113 return NULL; 1114} 1115 1116sp<IBinder> Parcel::readStrongBinder() const 1117{ 1118 sp<IBinder> val; 1119 unflatten_binder(ProcessState::self(), *this, &val); 1120 return val; 1121} 1122 1123wp<IBinder> Parcel::readWeakBinder() const 1124{ 1125 wp<IBinder> val; 1126 unflatten_binder(ProcessState::self(), *this, &val); 1127 return val; 1128} 1129 1130int32_t Parcel::readExceptionCode() const 1131{ 1132 int32_t exception_code = readAligned<int32_t>(); 1133 if (exception_code == EX_HAS_REPLY_HEADER) { 1134 int32_t header_start = dataPosition(); 1135 int32_t header_size = readAligned<int32_t>(); 1136 // Skip over fat responses headers. Not used (or propagated) in 1137 // native code 1138 setDataPosition(header_start + header_size); 1139 // And fat response headers are currently only used when there are no 1140 // exceptions, so return no error: 1141 return 0; 1142 } 1143 return exception_code; 1144} 1145 1146native_handle* Parcel::readNativeHandle() const 1147{ 1148 int numFds, numInts; 1149 status_t err; 1150 err = readInt32(&numFds); 1151 if (err != NO_ERROR) return 0; 1152 err = readInt32(&numInts); 1153 if (err != NO_ERROR) return 0; 1154 1155 native_handle* h = native_handle_create(numFds, numInts); 1156 for (int i=0 ; err==NO_ERROR && i<numFds ; i++) { 1157 h->data[i] = dup(readFileDescriptor()); 1158 if (h->data[i] < 0) err = BAD_VALUE; 1159 } 1160 err = read(h->data + numFds, sizeof(int)*numInts); 1161 if (err != NO_ERROR) { 1162 native_handle_close(h); 1163 native_handle_delete(h); 1164 h = 0; 1165 } 1166 return h; 1167} 1168 1169 1170int Parcel::readFileDescriptor() const 1171{ 1172 const flat_binder_object* flat = readObject(true); 1173 if (flat) { 1174 switch (flat->type) { 1175 case BINDER_TYPE_FD: 1176 //ALOGI("Returning file descriptor %ld from parcel %p\n", flat->handle, this); 1177 return flat->handle; 1178 } 1179 } 1180 return BAD_TYPE; 1181} 1182 1183status_t Parcel::readBlob(size_t len, ReadableBlob* outBlob) const 1184{ 1185 int32_t useAshmem; 1186 status_t status = readInt32(&useAshmem); 1187 if (status) return status; 1188 1189 if (!useAshmem) { 1190 ALOGV("readBlob: read in place"); 1191 const void* ptr = readInplace(len); 1192 if (!ptr) return BAD_VALUE; 1193 1194 outBlob->init(false /*mapped*/, const_cast<void*>(ptr), len); 1195 return NO_ERROR; 1196 } 1197 1198 ALOGV("readBlob: read from ashmem"); 1199 int fd = readFileDescriptor(); 1200 if (fd == int(BAD_TYPE)) return BAD_VALUE; 1201 1202 void* ptr = ::mmap(NULL, len, PROT_READ, MAP_SHARED, fd, 0); 1203 if (!ptr) return NO_MEMORY; 1204 1205 outBlob->init(true /*mapped*/, ptr, len); 1206 return NO_ERROR; 1207} 1208 1209status_t Parcel::read(FlattenableHelperInterface& val) const 1210{ 1211 // size 1212 const size_t len = this->readInt32(); 1213 const size_t fd_count = this->readInt32(); 1214 1215 // payload 1216 void const* const buf = this->readInplace(PAD_SIZE(len)); 1217 if (buf == NULL) 1218 return BAD_VALUE; 1219 1220 int* fds = NULL; 1221 if (fd_count) { 1222 fds = new int[fd_count]; 1223 } 1224 1225 status_t err = NO_ERROR; 1226 for (size_t i=0 ; i<fd_count && err==NO_ERROR ; i++) { 1227 fds[i] = dup(this->readFileDescriptor()); 1228 if (fds[i] < 0) err = BAD_VALUE; 1229 } 1230 1231 if (err == NO_ERROR) { 1232 err = val.unflatten(buf, len, fds, fd_count); 1233 } 1234 1235 if (fd_count) { 1236 delete [] fds; 1237 } 1238 1239 return err; 1240} 1241const flat_binder_object* Parcel::readObject(bool nullMetaData) const 1242{ 1243 const size_t DPOS = mDataPos; 1244 if ((DPOS+sizeof(flat_binder_object)) <= mDataSize) { 1245 const flat_binder_object* obj 1246 = reinterpret_cast<const flat_binder_object*>(mData+DPOS); 1247 mDataPos = DPOS + sizeof(flat_binder_object); 1248 if (!nullMetaData && (obj->cookie == 0 && obj->binder == 0)) { 1249 // When transferring a NULL object, we don't write it into 1250 // the object list, so we don't want to check for it when 1251 // reading. 1252 ALOGV("readObject Setting data pos of %p to %d\n", this, mDataPos); 1253 return obj; 1254 } 1255 1256 // Ensure that this object is valid... 1257 binder_size_t* const OBJS = mObjects; 1258 const size_t N = mObjectsSize; 1259 size_t opos = mNextObjectHint; 1260 1261 if (N > 0) { 1262 ALOGV("Parcel %p looking for obj at %d, hint=%d\n", 1263 this, DPOS, opos); 1264 1265 // Start at the current hint position, looking for an object at 1266 // the current data position. 1267 if (opos < N) { 1268 while (opos < (N-1) && OBJS[opos] < DPOS) { 1269 opos++; 1270 } 1271 } else { 1272 opos = N-1; 1273 } 1274 if (OBJS[opos] == DPOS) { 1275 // Found it! 1276 ALOGV("Parcel found obj %d at index %d with forward search", 1277 this, DPOS, opos); 1278 mNextObjectHint = opos+1; 1279 ALOGV("readObject Setting data pos of %p to %d\n", this, mDataPos); 1280 return obj; 1281 } 1282 1283 // Look backwards for it... 1284 while (opos > 0 && OBJS[opos] > DPOS) { 1285 opos--; 1286 } 1287 if (OBJS[opos] == DPOS) { 1288 // Found it! 1289 ALOGV("Parcel found obj %d at index %d with backward search", 1290 this, DPOS, opos); 1291 mNextObjectHint = opos+1; 1292 ALOGV("readObject Setting data pos of %p to %d\n", this, mDataPos); 1293 return obj; 1294 } 1295 } 1296 ALOGW("Attempt to read object from Parcel %p at offset %d that is not in the object list", 1297 this, DPOS); 1298 } 1299 return NULL; 1300} 1301 1302void Parcel::closeFileDescriptors() 1303{ 1304 size_t i = mObjectsSize; 1305 if (i > 0) { 1306 //ALOGI("Closing file descriptors for %d objects...", mObjectsSize); 1307 } 1308 while (i > 0) { 1309 i--; 1310 const flat_binder_object* flat 1311 = reinterpret_cast<flat_binder_object*>(mData+mObjects[i]); 1312 if (flat->type == BINDER_TYPE_FD) { 1313 //ALOGI("Closing fd: %ld\n", flat->handle); 1314 close(flat->handle); 1315 } 1316 } 1317} 1318 1319uintptr_t Parcel::ipcData() const 1320{ 1321 return reinterpret_cast<uintptr_t>(mData); 1322} 1323 1324size_t Parcel::ipcDataSize() const 1325{ 1326 return (mDataSize > mDataPos ? mDataSize : mDataPos); 1327} 1328 1329uintptr_t Parcel::ipcObjects() const 1330{ 1331 return reinterpret_cast<uintptr_t>(mObjects); 1332} 1333 1334size_t Parcel::ipcObjectsCount() const 1335{ 1336 return mObjectsSize; 1337} 1338 1339void Parcel::ipcSetDataReference(const uint8_t* data, size_t dataSize, 1340 const binder_size_t* objects, size_t objectsCount, release_func relFunc, void* relCookie) 1341{ 1342 size_t minOffset = 0; 1343 freeDataNoInit(); 1344 mError = NO_ERROR; 1345 mData = const_cast<uint8_t*>(data); 1346 mDataSize = mDataCapacity = dataSize; 1347 //ALOGI("setDataReference Setting data size of %p to %lu (pid=%d)\n", this, mDataSize, getpid()); 1348 mDataPos = 0; 1349 ALOGV("setDataReference Setting data pos of %p to %d\n", this, mDataPos); 1350 mObjects = const_cast<binder_size_t*>(objects); 1351 mObjectsSize = mObjectsCapacity = objectsCount; 1352 mNextObjectHint = 0; 1353 mOwner = relFunc; 1354 mOwnerCookie = relCookie; 1355 for (size_t i = 0; i < mObjectsSize; i++) { 1356 size_t offset = mObjects[i]; 1357 if (offset < minOffset) { 1358 ALOGE("%s: bad object offset %zu < %zu\n", 1359 __func__, offset, minOffset); 1360 mObjectsSize = 0; 1361 break; 1362 } 1363 minOffset = offset + sizeof(flat_binder_object); 1364 } 1365 scanForFds(); 1366} 1367 1368void Parcel::print(TextOutput& to, uint32_t flags) const 1369{ 1370 to << "Parcel("; 1371 1372 if (errorCheck() != NO_ERROR) { 1373 const status_t err = errorCheck(); 1374 to << "Error: " << (void*)err << " \"" << strerror(-err) << "\""; 1375 } else if (dataSize() > 0) { 1376 const uint8_t* DATA = data(); 1377 to << indent << HexDump(DATA, dataSize()) << dedent; 1378 const binder_size_t* OBJS = objects(); 1379 const size_t N = objectsCount(); 1380 for (size_t i=0; i<N; i++) { 1381 const flat_binder_object* flat 1382 = reinterpret_cast<const flat_binder_object*>(DATA+OBJS[i]); 1383 to << endl << "Object #" << i << " @ " << (void*)OBJS[i] << ": " 1384 << TypeCode(flat->type & 0x7f7f7f00) 1385 << " = " << flat->binder; 1386 } 1387 } else { 1388 to << "NULL"; 1389 } 1390 1391 to << ")"; 1392} 1393 1394void Parcel::releaseObjects() 1395{ 1396 const sp<ProcessState> proc(ProcessState::self()); 1397 size_t i = mObjectsSize; 1398 uint8_t* const data = mData; 1399 binder_size_t* const objects = mObjects; 1400 while (i > 0) { 1401 i--; 1402 const flat_binder_object* flat 1403 = reinterpret_cast<flat_binder_object*>(data+objects[i]); 1404 release_object(proc, *flat, this); 1405 } 1406} 1407 1408void Parcel::acquireObjects() 1409{ 1410 const sp<ProcessState> proc(ProcessState::self()); 1411 size_t i = mObjectsSize; 1412 uint8_t* const data = mData; 1413 binder_size_t* const objects = mObjects; 1414 while (i > 0) { 1415 i--; 1416 const flat_binder_object* flat 1417 = reinterpret_cast<flat_binder_object*>(data+objects[i]); 1418 acquire_object(proc, *flat, this); 1419 } 1420} 1421 1422void Parcel::freeData() 1423{ 1424 freeDataNoInit(); 1425 initState(); 1426} 1427 1428void Parcel::freeDataNoInit() 1429{ 1430 if (mOwner) { 1431 //ALOGI("Freeing data ref of %p (pid=%d)\n", this, getpid()); 1432 mOwner(this, mData, mDataSize, mObjects, mObjectsSize, mOwnerCookie); 1433 } else { 1434 releaseObjects(); 1435 if (mData) free(mData); 1436 if (mObjects) free(mObjects); 1437 } 1438} 1439 1440status_t Parcel::growData(size_t len) 1441{ 1442 size_t newSize = ((mDataSize+len)*3)/2; 1443 return (newSize <= mDataSize) 1444 ? (status_t) NO_MEMORY 1445 : continueWrite(newSize); 1446} 1447 1448status_t Parcel::restartWrite(size_t desired) 1449{ 1450 if (mOwner) { 1451 freeData(); 1452 return continueWrite(desired); 1453 } 1454 1455 uint8_t* data = (uint8_t*)realloc(mData, desired); 1456 if (!data && desired > mDataCapacity) { 1457 mError = NO_MEMORY; 1458 return NO_MEMORY; 1459 } 1460 1461 releaseObjects(); 1462 1463 if (data) { 1464 mData = data; 1465 mDataCapacity = desired; 1466 } 1467 1468 mDataSize = mDataPos = 0; 1469 ALOGV("restartWrite Setting data size of %p to %d\n", this, mDataSize); 1470 ALOGV("restartWrite Setting data pos of %p to %d\n", this, mDataPos); 1471 1472 free(mObjects); 1473 mObjects = NULL; 1474 mObjectsSize = mObjectsCapacity = 0; 1475 mNextObjectHint = 0; 1476 mHasFds = false; 1477 mFdsKnown = true; 1478 mAllowFds = true; 1479 1480 return NO_ERROR; 1481} 1482 1483status_t Parcel::continueWrite(size_t desired) 1484{ 1485 // If shrinking, first adjust for any objects that appear 1486 // after the new data size. 1487 size_t objectsSize = mObjectsSize; 1488 if (desired < mDataSize) { 1489 if (desired == 0) { 1490 objectsSize = 0; 1491 } else { 1492 while (objectsSize > 0) { 1493 if (mObjects[objectsSize-1] < desired) 1494 break; 1495 objectsSize--; 1496 } 1497 } 1498 } 1499 1500 if (mOwner) { 1501 // If the size is going to zero, just release the owner's data. 1502 if (desired == 0) { 1503 freeData(); 1504 return NO_ERROR; 1505 } 1506 1507 // If there is a different owner, we need to take 1508 // posession. 1509 uint8_t* data = (uint8_t*)malloc(desired); 1510 if (!data) { 1511 mError = NO_MEMORY; 1512 return NO_MEMORY; 1513 } 1514 binder_size_t* objects = NULL; 1515 1516 if (objectsSize) { 1517 objects = (binder_size_t*)malloc(objectsSize*sizeof(binder_size_t)); 1518 if (!objects) { 1519 free(data); 1520 1521 mError = NO_MEMORY; 1522 return NO_MEMORY; 1523 } 1524 1525 // Little hack to only acquire references on objects 1526 // we will be keeping. 1527 size_t oldObjectsSize = mObjectsSize; 1528 mObjectsSize = objectsSize; 1529 acquireObjects(); 1530 mObjectsSize = oldObjectsSize; 1531 } 1532 1533 if (mData) { 1534 memcpy(data, mData, mDataSize < desired ? mDataSize : desired); 1535 } 1536 if (objects && mObjects) { 1537 memcpy(objects, mObjects, objectsSize*sizeof(binder_size_t)); 1538 } 1539 //ALOGI("Freeing data ref of %p (pid=%d)\n", this, getpid()); 1540 mOwner(this, mData, mDataSize, mObjects, mObjectsSize, mOwnerCookie); 1541 mOwner = NULL; 1542 1543 mData = data; 1544 mObjects = objects; 1545 mDataSize = (mDataSize < desired) ? mDataSize : desired; 1546 ALOGV("continueWrite Setting data size of %p to %d\n", this, mDataSize); 1547 mDataCapacity = desired; 1548 mObjectsSize = mObjectsCapacity = objectsSize; 1549 mNextObjectHint = 0; 1550 1551 } else if (mData) { 1552 if (objectsSize < mObjectsSize) { 1553 // Need to release refs on any objects we are dropping. 1554 const sp<ProcessState> proc(ProcessState::self()); 1555 for (size_t i=objectsSize; i<mObjectsSize; i++) { 1556 const flat_binder_object* flat 1557 = reinterpret_cast<flat_binder_object*>(mData+mObjects[i]); 1558 if (flat->type == BINDER_TYPE_FD) { 1559 // will need to rescan because we may have lopped off the only FDs 1560 mFdsKnown = false; 1561 } 1562 release_object(proc, *flat, this); 1563 } 1564 binder_size_t* objects = 1565 (binder_size_t*)realloc(mObjects, objectsSize*sizeof(binder_size_t)); 1566 if (objects) { 1567 mObjects = objects; 1568 } 1569 mObjectsSize = objectsSize; 1570 mNextObjectHint = 0; 1571 } 1572 1573 // We own the data, so we can just do a realloc(). 1574 if (desired > mDataCapacity) { 1575 uint8_t* data = (uint8_t*)realloc(mData, desired); 1576 if (data) { 1577 mData = data; 1578 mDataCapacity = desired; 1579 } else if (desired > mDataCapacity) { 1580 mError = NO_MEMORY; 1581 return NO_MEMORY; 1582 } 1583 } else { 1584 if (mDataSize > desired) { 1585 mDataSize = desired; 1586 ALOGV("continueWrite Setting data size of %p to %d\n", this, mDataSize); 1587 } 1588 if (mDataPos > desired) { 1589 mDataPos = desired; 1590 ALOGV("continueWrite Setting data pos of %p to %d\n", this, mDataPos); 1591 } 1592 } 1593 1594 } else { 1595 // This is the first data. Easy! 1596 uint8_t* data = (uint8_t*)malloc(desired); 1597 if (!data) { 1598 mError = NO_MEMORY; 1599 return NO_MEMORY; 1600 } 1601 1602 if(!(mDataCapacity == 0 && mObjects == NULL 1603 && mObjectsCapacity == 0)) { 1604 ALOGE("continueWrite: %d/%p/%d/%d", mDataCapacity, mObjects, mObjectsCapacity, desired); 1605 } 1606 1607 mData = data; 1608 mDataSize = mDataPos = 0; 1609 ALOGV("continueWrite Setting data size of %p to %d\n", this, mDataSize); 1610 ALOGV("continueWrite Setting data pos of %p to %d\n", this, mDataPos); 1611 mDataCapacity = desired; 1612 } 1613 1614 return NO_ERROR; 1615} 1616 1617void Parcel::initState() 1618{ 1619 mError = NO_ERROR; 1620 mData = 0; 1621 mDataSize = 0; 1622 mDataCapacity = 0; 1623 mDataPos = 0; 1624 ALOGV("initState Setting data size of %p to %d\n", this, mDataSize); 1625 ALOGV("initState Setting data pos of %p to %d\n", this, mDataPos); 1626 mObjects = NULL; 1627 mObjectsSize = 0; 1628 mObjectsCapacity = 0; 1629 mNextObjectHint = 0; 1630 mHasFds = false; 1631 mFdsKnown = true; 1632 mAllowFds = true; 1633 mOwner = NULL; 1634} 1635 1636void Parcel::scanForFds() const 1637{ 1638 bool hasFds = false; 1639 for (size_t i=0; i<mObjectsSize; i++) { 1640 const flat_binder_object* flat 1641 = reinterpret_cast<const flat_binder_object*>(mData + mObjects[i]); 1642 if (flat->type == BINDER_TYPE_FD) { 1643 hasFds = true; 1644 break; 1645 } 1646 } 1647 mHasFds = hasFds; 1648 mFdsKnown = true; 1649} 1650 1651// --- Parcel::Blob --- 1652 1653Parcel::Blob::Blob() : 1654 mMapped(false), mData(NULL), mSize(0) { 1655} 1656 1657Parcel::Blob::~Blob() { 1658 release(); 1659} 1660 1661void Parcel::Blob::release() { 1662 if (mMapped && mData) { 1663 ::munmap(mData, mSize); 1664 } 1665 clear(); 1666} 1667 1668void Parcel::Blob::init(bool mapped, void* data, size_t size) { 1669 mMapped = mapped; 1670 mData = data; 1671 mSize = size; 1672} 1673 1674void Parcel::Blob::clear() { 1675 mMapped = false; 1676 mData = NULL; 1677 mSize = 0; 1678} 1679 1680}; // namespace android 1681