1 /* 2 * Copyright (C) 2005 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #define LOG_TAG "Parcel" 18 //#define LOG_NDEBUG 0 19 20 #include <binder/Parcel.h> 21 22 #include <binder/IPCThreadState.h> 23 #include <binder/Binder.h> 24 #include <binder/BpBinder.h> 25 #include <utils/Debug.h> 26 #include <binder/ProcessState.h> 27 #include <utils/Log.h> 28 #include <utils/String8.h> 29 #include <utils/String16.h> 30 #include <utils/TextOutput.h> 31 #include <utils/misc.h> 32 #include <utils/Flattenable.h> 33 #include <cutils/ashmem.h> 34 35 #include <private/binder/binder_module.h> 36 37 #include <stdio.h> 38 #include <stdlib.h> 39 #include <stdint.h> 40 #include <sys/mman.h> 41 42 #ifndef INT32_MAX 43 #define INT32_MAX ((int32_t)(2147483647)) 44 #endif 45 46 #define LOG_REFS(...) 47 //#define LOG_REFS(...) ALOG(LOG_DEBUG, "Parcel", __VA_ARGS__) 48 49 // --------------------------------------------------------------------------- 50 51 #define PAD_SIZE(s) (((s)+3)&~3) 52 53 // Note: must be kept in sync with android/os/StrictMode.java's PENALTY_GATHER 54 #define STRICT_MODE_PENALTY_GATHER 0x100 55 56 // Note: must be kept in sync with android/os/Parcel.java's EX_HAS_REPLY_HEADER 57 #define EX_HAS_REPLY_HEADER -128 58 59 // Maximum size of a blob to transfer in-place. 60 static const size_t IN_PLACE_BLOB_LIMIT = 40 * 1024; 61 62 // XXX This can be made public if we want to provide 63 // support for typed data. 64 struct small_flat_data 65 { 66 uint32_t type; 67 uint32_t data; 68 }; 69 70 namespace android { 71 72 void acquire_object(const sp<ProcessState>& proc, 73 const flat_binder_object& obj, const void* who) 74 { 75 switch (obj.type) { 76 case BINDER_TYPE_BINDER: 77 if (obj.binder) { 78 LOG_REFS("Parcel %p acquiring reference on local %p", who, obj.cookie); 79 static_cast<IBinder*>(obj.cookie)->incStrong(who); 80 } 81 return; 82 case BINDER_TYPE_WEAK_BINDER: 83 if (obj.binder) 84 static_cast<RefBase::weakref_type*>(obj.binder)->incWeak(who); 85 return; 86 case BINDER_TYPE_HANDLE: { 87 const sp<IBinder> b = proc->getStrongProxyForHandle(obj.handle); 88 if (b != NULL) { 89 LOG_REFS("Parcel %p acquiring reference on remote %p", who, b.get()); 90 b->incStrong(who); 91 } 92 return; 93 } 94 case BINDER_TYPE_WEAK_HANDLE: { 95 const wp<IBinder> b = proc->getWeakProxyForHandle(obj.handle); 96 if (b != NULL) b.get_refs()->incWeak(who); 97 return; 98 } 99 case BINDER_TYPE_FD: { 100 // intentionally blank -- nothing to do to acquire this, but we do 101 // recognize it as a legitimate object type. 102 return; 103 } 104 } 105 106 ALOGD("Invalid object type 0x%08lx", obj.type); 107 } 108 109 void release_object(const sp<ProcessState>& proc, 110 const flat_binder_object& obj, const void* who) 111 { 112 switch (obj.type) { 113 case BINDER_TYPE_BINDER: 114 if (obj.binder) { 115 LOG_REFS("Parcel %p releasing reference on local %p", who, obj.cookie); 116 static_cast<IBinder*>(obj.cookie)->decStrong(who); 117 } 118 return; 119 case BINDER_TYPE_WEAK_BINDER: 120 if (obj.binder) 121 static_cast<RefBase::weakref_type*>(obj.binder)->decWeak(who); 122 return; 123 case BINDER_TYPE_HANDLE: { 124 const sp<IBinder> b = proc->getStrongProxyForHandle(obj.handle); 125 if (b != NULL) { 126 LOG_REFS("Parcel %p releasing reference on remote %p", who, b.get()); 127 b->decStrong(who); 128 } 129 return; 130 } 131 case BINDER_TYPE_WEAK_HANDLE: { 132 const wp<IBinder> b = proc->getWeakProxyForHandle(obj.handle); 133 if (b != NULL) b.get_refs()->decWeak(who); 134 return; 135 } 136 case BINDER_TYPE_FD: { 137 if (obj.cookie != (void*)0) close(obj.handle); 138 return; 139 } 140 } 141 142 ALOGE("Invalid object type 0x%08lx", obj.type); 143 } 144 145 inline static status_t finish_flatten_binder( 146 const sp<IBinder>& binder, const flat_binder_object& flat, Parcel* out) 147 { 148 return out->writeObject(flat, false); 149 } 150 151 status_t flatten_binder(const sp<ProcessState>& proc, 152 const sp<IBinder>& binder, Parcel* out) 153 { 154 flat_binder_object obj; 155 156 obj.flags = 0x7f | FLAT_BINDER_FLAG_ACCEPTS_FDS; 157 if (binder != NULL) { 158 IBinder *local = binder->localBinder(); 159 if (!local) { 160 BpBinder *proxy = binder->remoteBinder(); 161 if (proxy == NULL) { 162 ALOGE("null proxy"); 163 } 164 const int32_t handle = proxy ? proxy->handle() : 0; 165 obj.type = BINDER_TYPE_HANDLE; 166 obj.handle = handle; 167 obj.cookie = NULL; 168 } else { 169 obj.type = BINDER_TYPE_BINDER; 170 obj.binder = local->getWeakRefs(); 171 obj.cookie = local; 172 } 173 } else { 174 obj.type = BINDER_TYPE_BINDER; 175 obj.binder = NULL; 176 obj.cookie = NULL; 177 } 178 179 return finish_flatten_binder(binder, obj, out); 180 } 181 182 status_t flatten_binder(const sp<ProcessState>& proc, 183 const wp<IBinder>& binder, Parcel* out) 184 { 185 flat_binder_object obj; 186 187 obj.flags = 0x7f | FLAT_BINDER_FLAG_ACCEPTS_FDS; 188 if (binder != NULL) { 189 sp<IBinder> real = binder.promote(); 190 if (real != NULL) { 191 IBinder *local = real->localBinder(); 192 if (!local) { 193 BpBinder *proxy = real->remoteBinder(); 194 if (proxy == NULL) { 195 ALOGE("null proxy"); 196 } 197 const int32_t handle = proxy ? proxy->handle() : 0; 198 obj.type = BINDER_TYPE_WEAK_HANDLE; 199 obj.handle = handle; 200 obj.cookie = NULL; 201 } else { 202 obj.type = BINDER_TYPE_WEAK_BINDER; 203 obj.binder = binder.get_refs(); 204 obj.cookie = binder.unsafe_get(); 205 } 206 return finish_flatten_binder(real, obj, out); 207 } 208 209 // XXX How to deal? In order to flatten the given binder, 210 // we need to probe it for information, which requires a primary 211 // reference... but we don't have one. 212 // 213 // The OpenBinder implementation uses a dynamic_cast<> here, 214 // but we can't do that with the different reference counting 215 // implementation we are using. 216 ALOGE("Unable to unflatten Binder weak reference!"); 217 obj.type = BINDER_TYPE_BINDER; 218 obj.binder = NULL; 219 obj.cookie = NULL; 220 return finish_flatten_binder(NULL, obj, out); 221 222 } else { 223 obj.type = BINDER_TYPE_BINDER; 224 obj.binder = NULL; 225 obj.cookie = NULL; 226 return finish_flatten_binder(NULL, obj, out); 227 } 228 } 229 230 inline static status_t finish_unflatten_binder( 231 BpBinder* proxy, const flat_binder_object& flat, const Parcel& in) 232 { 233 return NO_ERROR; 234 } 235 236 status_t unflatten_binder(const sp<ProcessState>& proc, 237 const Parcel& in, sp<IBinder>* out) 238 { 239 const flat_binder_object* flat = in.readObject(false); 240 241 if (flat) { 242 switch (flat->type) { 243 case BINDER_TYPE_BINDER: 244 *out = static_cast<IBinder*>(flat->cookie); 245 return finish_unflatten_binder(NULL, *flat, in); 246 case BINDER_TYPE_HANDLE: 247 *out = proc->getStrongProxyForHandle(flat->handle); 248 return finish_unflatten_binder( 249 static_cast<BpBinder*>(out->get()), *flat, in); 250 } 251 } 252 return BAD_TYPE; 253 } 254 255 status_t unflatten_binder(const sp<ProcessState>& proc, 256 const Parcel& in, wp<IBinder>* out) 257 { 258 const flat_binder_object* flat = in.readObject(false); 259 260 if (flat) { 261 switch (flat->type) { 262 case BINDER_TYPE_BINDER: 263 *out = static_cast<IBinder*>(flat->cookie); 264 return finish_unflatten_binder(NULL, *flat, in); 265 case BINDER_TYPE_WEAK_BINDER: 266 if (flat->binder != NULL) { 267 out->set_object_and_refs( 268 static_cast<IBinder*>(flat->cookie), 269 static_cast<RefBase::weakref_type*>(flat->binder)); 270 } else { 271 *out = NULL; 272 } 273 return finish_unflatten_binder(NULL, *flat, in); 274 case BINDER_TYPE_HANDLE: 275 case BINDER_TYPE_WEAK_HANDLE: 276 *out = proc->getWeakProxyForHandle(flat->handle); 277 return finish_unflatten_binder( 278 static_cast<BpBinder*>(out->unsafe_get()), *flat, in); 279 } 280 } 281 return BAD_TYPE; 282 } 283 284 // --------------------------------------------------------------------------- 285 286 Parcel::Parcel() 287 { 288 initState(); 289 } 290 291 Parcel::~Parcel() 292 { 293 freeDataNoInit(); 294 } 295 296 const uint8_t* Parcel::data() const 297 { 298 return mData; 299 } 300 301 size_t Parcel::dataSize() const 302 { 303 return (mDataSize > mDataPos ? mDataSize : mDataPos); 304 } 305 306 size_t Parcel::dataAvail() const 307 { 308 // TODO: decide what to do about the possibility that this can 309 // report an available-data size that exceeds a Java int's max 310 // positive value, causing havoc. Fortunately this will only 311 // happen if someone constructs a Parcel containing more than two 312 // gigabytes of data, which on typical phone hardware is simply 313 // not possible. 314 return dataSize() - dataPosition(); 315 } 316 317 size_t Parcel::dataPosition() const 318 { 319 return mDataPos; 320 } 321 322 size_t Parcel::dataCapacity() const 323 { 324 return mDataCapacity; 325 } 326 327 status_t Parcel::setDataSize(size_t size) 328 { 329 status_t err; 330 err = continueWrite(size); 331 if (err == NO_ERROR) { 332 mDataSize = size; 333 ALOGV("setDataSize Setting data size of %p to %d\n", this, mDataSize); 334 } 335 return err; 336 } 337 338 void Parcel::setDataPosition(size_t pos) const 339 { 340 mDataPos = pos; 341 mNextObjectHint = 0; 342 } 343 344 status_t Parcel::setDataCapacity(size_t size) 345 { 346 if (size > mDataCapacity) return continueWrite(size); 347 return NO_ERROR; 348 } 349 350 status_t Parcel::setData(const uint8_t* buffer, size_t len) 351 { 352 status_t err = restartWrite(len); 353 if (err == NO_ERROR) { 354 memcpy(const_cast<uint8_t*>(data()), buffer, len); 355 mDataSize = len; 356 mFdsKnown = false; 357 } 358 return err; 359 } 360 361 status_t Parcel::appendFrom(const Parcel *parcel, size_t offset, size_t len) 362 { 363 const sp<ProcessState> proc(ProcessState::self()); 364 status_t err; 365 const uint8_t *data = parcel->mData; 366 const size_t *objects = parcel->mObjects; 367 size_t size = parcel->mObjectsSize; 368 int startPos = mDataPos; 369 int firstIndex = -1, lastIndex = -2; 370 371 if (len == 0) { 372 return NO_ERROR; 373 } 374 375 // range checks against the source parcel size 376 if ((offset > parcel->mDataSize) 377 || (len > parcel->mDataSize) 378 || (offset + len > parcel->mDataSize)) { 379 return BAD_VALUE; 380 } 381 382 // Count objects in range 383 for (int i = 0; i < (int) size; i++) { 384 size_t off = objects[i]; 385 if ((off >= offset) && (off < offset + len)) { 386 if (firstIndex == -1) { 387 firstIndex = i; 388 } 389 lastIndex = i; 390 } 391 } 392 int numObjects = lastIndex - firstIndex + 1; 393 394 if ((mDataSize+len) > mDataCapacity) { 395 // grow data 396 err = growData(len); 397 if (err != NO_ERROR) { 398 return err; 399 } 400 } 401 402 // append data 403 memcpy(mData + mDataPos, data + offset, len); 404 mDataPos += len; 405 mDataSize += len; 406 407 err = NO_ERROR; 408 409 if (numObjects > 0) { 410 // grow objects 411 if (mObjectsCapacity < mObjectsSize + numObjects) { 412 int newSize = ((mObjectsSize + numObjects)*3)/2; 413 size_t *objects = 414 (size_t*)realloc(mObjects, newSize*sizeof(size_t)); 415 if (objects == (size_t*)0) { 416 return NO_MEMORY; 417 } 418 mObjects = objects; 419 mObjectsCapacity = newSize; 420 } 421 422 // append and acquire objects 423 int idx = mObjectsSize; 424 for (int i = firstIndex; i <= lastIndex; i++) { 425 size_t off = objects[i] - offset + startPos; 426 mObjects[idx++] = off; 427 mObjectsSize++; 428 429 flat_binder_object* flat 430 = reinterpret_cast<flat_binder_object*>(mData + off); 431 acquire_object(proc, *flat, this); 432 433 if (flat->type == BINDER_TYPE_FD) { 434 // If this is a file descriptor, we need to dup it so the 435 // new Parcel now owns its own fd, and can declare that we 436 // officially know we have fds. 437 flat->handle = dup(flat->handle); 438 flat->cookie = (void*)1; 439 mHasFds = mFdsKnown = true; 440 if (!mAllowFds) { 441 err = FDS_NOT_ALLOWED; 442 } 443 } 444 } 445 } 446 447 return err; 448 } 449 450 bool Parcel::pushAllowFds(bool allowFds) 451 { 452 const bool origValue = mAllowFds; 453 if (!allowFds) { 454 mAllowFds = false; 455 } 456 return origValue; 457 } 458 459 void Parcel::restoreAllowFds(bool lastValue) 460 { 461 mAllowFds = lastValue; 462 } 463 464 bool Parcel::hasFileDescriptors() const 465 { 466 if (!mFdsKnown) { 467 scanForFds(); 468 } 469 return mHasFds; 470 } 471 472 // Write RPC headers. (previously just the interface token) 473 status_t Parcel::writeInterfaceToken(const String16& interface) 474 { 475 writeInt32(IPCThreadState::self()->getStrictModePolicy() | 476 STRICT_MODE_PENALTY_GATHER); 477 // currently the interface identification token is just its name as a string 478 return writeString16(interface); 479 } 480 481 bool Parcel::checkInterface(IBinder* binder) const 482 { 483 return enforceInterface(binder->getInterfaceDescriptor()); 484 } 485 486 bool Parcel::enforceInterface(const String16& interface, 487 IPCThreadState* threadState) const 488 { 489 int32_t strictPolicy = readInt32(); 490 if (threadState == NULL) { 491 threadState = IPCThreadState::self(); 492 } 493 if ((threadState->getLastTransactionBinderFlags() & 494 IBinder::FLAG_ONEWAY) != 0) { 495 // For one-way calls, the callee is running entirely 496 // disconnected from the caller, so disable StrictMode entirely. 497 // Not only does disk/network usage not impact the caller, but 498 // there's no way to commuicate back any violations anyway. 499 threadState->setStrictModePolicy(0); 500 } else { 501 threadState->setStrictModePolicy(strictPolicy); 502 } 503 const String16 str(readString16()); 504 if (str == interface) { 505 return true; 506 } else { 507 ALOGW("**** enforceInterface() expected '%s' but read '%s'\n", 508 String8(interface).string(), String8(str).string()); 509 return false; 510 } 511 } 512 513 const size_t* Parcel::objects() const 514 { 515 return mObjects; 516 } 517 518 size_t Parcel::objectsCount() const 519 { 520 return mObjectsSize; 521 } 522 523 status_t Parcel::errorCheck() const 524 { 525 return mError; 526 } 527 528 void Parcel::setError(status_t err) 529 { 530 mError = err; 531 } 532 533 status_t Parcel::finishWrite(size_t len) 534 { 535 //printf("Finish write of %d\n", len); 536 mDataPos += len; 537 ALOGV("finishWrite Setting data pos of %p to %d\n", this, mDataPos); 538 if (mDataPos > mDataSize) { 539 mDataSize = mDataPos; 540 ALOGV("finishWrite Setting data size of %p to %d\n", this, mDataSize); 541 } 542 //printf("New pos=%d, size=%d\n", mDataPos, mDataSize); 543 return NO_ERROR; 544 } 545 546 status_t Parcel::writeUnpadded(const void* data, size_t len) 547 { 548 size_t end = mDataPos + len; 549 if (end < mDataPos) { 550 // integer overflow 551 return BAD_VALUE; 552 } 553 554 if (end <= mDataCapacity) { 555 restart_write: 556 memcpy(mData+mDataPos, data, len); 557 return finishWrite(len); 558 } 559 560 status_t err = growData(len); 561 if (err == NO_ERROR) goto restart_write; 562 return err; 563 } 564 565 status_t Parcel::write(const void* data, size_t len) 566 { 567 void* const d = writeInplace(len); 568 if (d) { 569 memcpy(d, data, len); 570 return NO_ERROR; 571 } 572 return mError; 573 } 574 575 void* Parcel::writeInplace(size_t len) 576 { 577 const size_t padded = PAD_SIZE(len); 578 579 // sanity check for integer overflow 580 if (mDataPos+padded < mDataPos) { 581 return NULL; 582 } 583 584 if ((mDataPos+padded) <= mDataCapacity) { 585 restart_write: 586 //printf("Writing %ld bytes, padded to %ld\n", len, padded); 587 uint8_t* const data = mData+mDataPos; 588 589 // Need to pad at end? 590 if (padded != len) { 591 #if BYTE_ORDER == BIG_ENDIAN 592 static const uint32_t mask[4] = { 593 0x00000000, 0xffffff00, 0xffff0000, 0xff000000 594 }; 595 #endif 596 #if BYTE_ORDER == LITTLE_ENDIAN 597 static const uint32_t mask[4] = { 598 0x00000000, 0x00ffffff, 0x0000ffff, 0x000000ff 599 }; 600 #endif 601 //printf("Applying pad mask: %p to %p\n", (void*)mask[padded-len], 602 // *reinterpret_cast<void**>(data+padded-4)); 603 *reinterpret_cast<uint32_t*>(data+padded-4) &= mask[padded-len]; 604 } 605 606 finishWrite(padded); 607 return data; 608 } 609 610 status_t err = growData(padded); 611 if (err == NO_ERROR) goto restart_write; 612 return NULL; 613 } 614 615 status_t Parcel::writeInt32(int32_t val) 616 { 617 return writeAligned(val); 618 } 619 620 status_t Parcel::writeInt64(int64_t val) 621 { 622 return writeAligned(val); 623 } 624 625 status_t Parcel::writeFloat(float val) 626 { 627 return writeAligned(val); 628 } 629 630 #if defined(__mips__) && defined(__mips_hard_float) 631 632 status_t Parcel::writeDouble(double val) 633 { 634 union { 635 double d; 636 unsigned long long ll; 637 } u; 638 u.d = val; 639 return writeAligned(u.ll); 640 } 641 642 #else 643 644 status_t Parcel::writeDouble(double val) 645 { 646 return writeAligned(val); 647 } 648 649 #endif 650 651 status_t Parcel::writeIntPtr(intptr_t val) 652 { 653 return writeAligned(val); 654 } 655 656 status_t Parcel::writeCString(const char* str) 657 { 658 return write(str, strlen(str)+1); 659 } 660 661 status_t Parcel::writeString8(const String8& str) 662 { 663 status_t err = writeInt32(str.bytes()); 664 // only write string if its length is more than zero characters, 665 // as readString8 will only read if the length field is non-zero. 666 // this is slightly different from how writeString16 works. 667 if (str.bytes() > 0 && err == NO_ERROR) { 668 err = write(str.string(), str.bytes()+1); 669 } 670 return err; 671 } 672 673 status_t Parcel::writeString16(const String16& str) 674 { 675 return writeString16(str.string(), str.size()); 676 } 677 678 status_t Parcel::writeString16(const char16_t* str, size_t len) 679 { 680 if (str == NULL) return writeInt32(-1); 681 682 status_t err = writeInt32(len); 683 if (err == NO_ERROR) { 684 len *= sizeof(char16_t); 685 uint8_t* data = (uint8_t*)writeInplace(len+sizeof(char16_t)); 686 if (data) { 687 memcpy(data, str, len); 688 *reinterpret_cast<char16_t*>(data+len) = 0; 689 return NO_ERROR; 690 } 691 err = mError; 692 } 693 return err; 694 } 695 696 status_t Parcel::writeStrongBinder(const sp<IBinder>& val) 697 { 698 return flatten_binder(ProcessState::self(), val, this); 699 } 700 701 status_t Parcel::writeWeakBinder(const wp<IBinder>& val) 702 { 703 return flatten_binder(ProcessState::self(), val, this); 704 } 705 706 status_t Parcel::writeNativeHandle(const native_handle* handle) 707 { 708 if (!handle || handle->version != sizeof(native_handle)) 709 return BAD_TYPE; 710 711 status_t err; 712 err = writeInt32(handle->numFds); 713 if (err != NO_ERROR) return err; 714 715 err = writeInt32(handle->numInts); 716 if (err != NO_ERROR) return err; 717 718 for (int i=0 ; err==NO_ERROR && i<handle->numFds ; i++) 719 err = writeDupFileDescriptor(handle->data[i]); 720 721 if (err != NO_ERROR) { 722 ALOGD("write native handle, write dup fd failed"); 723 return err; 724 } 725 err = write(handle->data + handle->numFds, sizeof(int)*handle->numInts); 726 return err; 727 } 728 729 status_t Parcel::writeFileDescriptor(int fd, bool takeOwnership) 730 { 731 flat_binder_object obj; 732 obj.type = BINDER_TYPE_FD; 733 obj.flags = 0x7f | FLAT_BINDER_FLAG_ACCEPTS_FDS; 734 obj.handle = fd; 735 obj.cookie = (void*) (takeOwnership ? 1 : 0); 736 return writeObject(obj, true); 737 } 738 739 status_t Parcel::writeDupFileDescriptor(int fd) 740 { 741 int dupFd = dup(fd); 742 if (dupFd < 0) { 743 return -errno; 744 } 745 status_t err = writeFileDescriptor(dupFd, true /*takeOwnership*/); 746 if (err) { 747 close(dupFd); 748 } 749 return err; 750 } 751 752 status_t Parcel::writeBlob(size_t len, WritableBlob* outBlob) 753 { 754 status_t status; 755 756 if (!mAllowFds || len <= IN_PLACE_BLOB_LIMIT) { 757 ALOGV("writeBlob: write in place"); 758 status = writeInt32(0); 759 if (status) return status; 760 761 void* ptr = writeInplace(len); 762 if (!ptr) return NO_MEMORY; 763 764 outBlob->init(false /*mapped*/, ptr, len); 765 return NO_ERROR; 766 } 767 768 ALOGV("writeBlob: write to ashmem"); 769 int fd = ashmem_create_region("Parcel Blob", len); 770 if (fd < 0) return NO_MEMORY; 771 772 int result = ashmem_set_prot_region(fd, PROT_READ | PROT_WRITE); 773 if (result < 0) { 774 status = result; 775 } else { 776 void* ptr = ::mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); 777 if (ptr == MAP_FAILED) { 778 status = -errno; 779 } else { 780 result = ashmem_set_prot_region(fd, PROT_READ); 781 if (result < 0) { 782 status = result; 783 } else { 784 status = writeInt32(1); 785 if (!status) { 786 status = writeFileDescriptor(fd, true /*takeOwnership*/); 787 if (!status) { 788 outBlob->init(true /*mapped*/, ptr, len); 789 return NO_ERROR; 790 } 791 } 792 } 793 } 794 ::munmap(ptr, len); 795 } 796 ::close(fd); 797 return status; 798 } 799 800 status_t Parcel::write(const Flattenable& val) 801 { 802 status_t err; 803 804 // size if needed 805 size_t len = val.getFlattenedSize(); 806 size_t fd_count = val.getFdCount(); 807 808 err = this->writeInt32(len); 809 if (err) return err; 810 811 err = this->writeInt32(fd_count); 812 if (err) return err; 813 814 // payload 815 void* buf = this->writeInplace(PAD_SIZE(len)); 816 if (buf == NULL) 817 return BAD_VALUE; 818 819 int* fds = NULL; 820 if (fd_count) { 821 fds = new int[fd_count]; 822 } 823 824 err = val.flatten(buf, len, fds, fd_count); 825 for (size_t i=0 ; i<fd_count && err==NO_ERROR ; i++) { 826 err = this->writeDupFileDescriptor( fds[i] ); 827 } 828 829 if (fd_count) { 830 delete [] fds; 831 } 832 833 return err; 834 } 835 836 status_t Parcel::writeObject(const flat_binder_object& val, bool nullMetaData) 837 { 838 const bool enoughData = (mDataPos+sizeof(val)) <= mDataCapacity; 839 const bool enoughObjects = mObjectsSize < mObjectsCapacity; 840 if (enoughData && enoughObjects) { 841 restart_write: 842 *reinterpret_cast<flat_binder_object*>(mData+mDataPos) = val; 843 844 // Need to write meta-data? 845 if (nullMetaData || val.binder != NULL) { 846 mObjects[mObjectsSize] = mDataPos; 847 acquire_object(ProcessState::self(), val, this); 848 mObjectsSize++; 849 } 850 851 // remember if it's a file descriptor 852 if (val.type == BINDER_TYPE_FD) { 853 if (!mAllowFds) { 854 return FDS_NOT_ALLOWED; 855 } 856 mHasFds = mFdsKnown = true; 857 } 858 859 return finishWrite(sizeof(flat_binder_object)); 860 } 861 862 if (!enoughData) { 863 const status_t err = growData(sizeof(val)); 864 if (err != NO_ERROR) return err; 865 } 866 if (!enoughObjects) { 867 size_t newSize = ((mObjectsSize+2)*3)/2; 868 size_t* objects = (size_t*)realloc(mObjects, newSize*sizeof(size_t)); 869 if (objects == NULL) return NO_MEMORY; 870 mObjects = objects; 871 mObjectsCapacity = newSize; 872 } 873 874 goto restart_write; 875 } 876 877 status_t Parcel::writeNoException() 878 { 879 return writeInt32(0); 880 } 881 882 void Parcel::remove(size_t start, size_t amt) 883 { 884 LOG_ALWAYS_FATAL("Parcel::remove() not yet implemented!"); 885 } 886 887 status_t Parcel::read(void* outData, size_t len) const 888 { 889 if ((mDataPos+PAD_SIZE(len)) >= mDataPos && (mDataPos+PAD_SIZE(len)) <= mDataSize) { 890 memcpy(outData, mData+mDataPos, len); 891 mDataPos += PAD_SIZE(len); 892 ALOGV("read Setting data pos of %p to %d\n", this, mDataPos); 893 return NO_ERROR; 894 } 895 return NOT_ENOUGH_DATA; 896 } 897 898 const void* Parcel::readInplace(size_t len) const 899 { 900 if ((mDataPos+PAD_SIZE(len)) >= mDataPos && (mDataPos+PAD_SIZE(len)) <= mDataSize) { 901 const void* data = mData+mDataPos; 902 mDataPos += PAD_SIZE(len); 903 ALOGV("readInplace Setting data pos of %p to %d\n", this, mDataPos); 904 return data; 905 } 906 return NULL; 907 } 908 909 template<class T> 910 status_t Parcel::readAligned(T *pArg) const { 911 COMPILE_TIME_ASSERT_FUNCTION_SCOPE(PAD_SIZE(sizeof(T)) == sizeof(T)); 912 913 if ((mDataPos+sizeof(T)) <= mDataSize) { 914 const void* data = mData+mDataPos; 915 mDataPos += sizeof(T); 916 *pArg = *reinterpret_cast<const T*>(data); 917 return NO_ERROR; 918 } else { 919 return NOT_ENOUGH_DATA; 920 } 921 } 922 923 template<class T> 924 T Parcel::readAligned() const { 925 T result; 926 if (readAligned(&result) != NO_ERROR) { 927 result = 0; 928 } 929 930 return result; 931 } 932 933 template<class T> 934 status_t Parcel::writeAligned(T val) { 935 COMPILE_TIME_ASSERT_FUNCTION_SCOPE(PAD_SIZE(sizeof(T)) == sizeof(T)); 936 937 if ((mDataPos+sizeof(val)) <= mDataCapacity) { 938 restart_write: 939 *reinterpret_cast<T*>(mData+mDataPos) = val; 940 return finishWrite(sizeof(val)); 941 } 942 943 status_t err = growData(sizeof(val)); 944 if (err == NO_ERROR) goto restart_write; 945 return err; 946 } 947 948 status_t Parcel::readInt32(int32_t *pArg) const 949 { 950 return readAligned(pArg); 951 } 952 953 int32_t Parcel::readInt32() const 954 { 955 return readAligned<int32_t>(); 956 } 957 958 959 status_t Parcel::readInt64(int64_t *pArg) const 960 { 961 return readAligned(pArg); 962 } 963 964 965 int64_t Parcel::readInt64() const 966 { 967 return readAligned<int64_t>(); 968 } 969 970 status_t Parcel::readFloat(float *pArg) const 971 { 972 return readAligned(pArg); 973 } 974 975 976 float Parcel::readFloat() const 977 { 978 return readAligned<float>(); 979 } 980 981 #if defined(__mips__) && defined(__mips_hard_float) 982 983 status_t Parcel::readDouble(double *pArg) const 984 { 985 union { 986 double d; 987 unsigned long long ll; 988 } u; 989 status_t status; 990 status = readAligned(&u.ll); 991 *pArg = u.d; 992 return status; 993 } 994 995 double Parcel::readDouble() const 996 { 997 union { 998 double d; 999 unsigned long long ll; 1000 } u; 1001 u.ll = readAligned<unsigned long long>(); 1002 return u.d; 1003 } 1004 1005 #else 1006 1007 status_t Parcel::readDouble(double *pArg) const 1008 { 1009 return readAligned(pArg); 1010 } 1011 1012 double Parcel::readDouble() const 1013 { 1014 return readAligned<double>(); 1015 } 1016 1017 #endif 1018 1019 status_t Parcel::readIntPtr(intptr_t *pArg) const 1020 { 1021 return readAligned(pArg); 1022 } 1023 1024 1025 intptr_t Parcel::readIntPtr() const 1026 { 1027 return readAligned<intptr_t>(); 1028 } 1029 1030 1031 const char* Parcel::readCString() const 1032 { 1033 const size_t avail = mDataSize-mDataPos; 1034 if (avail > 0) { 1035 const char* str = reinterpret_cast<const char*>(mData+mDataPos); 1036 // is the string's trailing NUL within the parcel's valid bounds? 1037 const char* eos = reinterpret_cast<const char*>(memchr(str, 0, avail)); 1038 if (eos) { 1039 const size_t len = eos - str; 1040 mDataPos += PAD_SIZE(len+1); 1041 ALOGV("readCString Setting data pos of %p to %d\n", this, mDataPos); 1042 return str; 1043 } 1044 } 1045 return NULL; 1046 } 1047 1048 String8 Parcel::readString8() const 1049 { 1050 int32_t size = readInt32(); 1051 // watch for potential int overflow adding 1 for trailing NUL 1052 if (size > 0 && size < INT32_MAX) { 1053 const char* str = (const char*)readInplace(size+1); 1054 if (str) return String8(str, size); 1055 } 1056 return String8(); 1057 } 1058 1059 String16 Parcel::readString16() const 1060 { 1061 size_t len; 1062 const char16_t* str = readString16Inplace(&len); 1063 if (str) return String16(str, len); 1064 ALOGE("Reading a NULL string not supported here."); 1065 return String16(); 1066 } 1067 1068 const char16_t* Parcel::readString16Inplace(size_t* outLen) const 1069 { 1070 int32_t size = readInt32(); 1071 // watch for potential int overflow from size+1 1072 if (size >= 0 && size < INT32_MAX) { 1073 *outLen = size; 1074 const char16_t* str = (const char16_t*)readInplace((size+1)*sizeof(char16_t)); 1075 if (str != NULL) { 1076 return str; 1077 } 1078 } 1079 *outLen = 0; 1080 return NULL; 1081 } 1082 1083 sp<IBinder> Parcel::readStrongBinder() const 1084 { 1085 sp<IBinder> val; 1086 unflatten_binder(ProcessState::self(), *this, &val); 1087 return val; 1088 } 1089 1090 wp<IBinder> Parcel::readWeakBinder() const 1091 { 1092 wp<IBinder> val; 1093 unflatten_binder(ProcessState::self(), *this, &val); 1094 return val; 1095 } 1096 1097 int32_t Parcel::readExceptionCode() const 1098 { 1099 int32_t exception_code = readAligned<int32_t>(); 1100 if (exception_code == EX_HAS_REPLY_HEADER) { 1101 int32_t header_start = dataPosition(); 1102 int32_t header_size = readAligned<int32_t>(); 1103 // Skip over fat responses headers. Not used (or propagated) in 1104 // native code 1105 setDataPosition(header_start + header_size); 1106 // And fat response headers are currently only used when there are no 1107 // exceptions, so return no error: 1108 return 0; 1109 } 1110 return exception_code; 1111 } 1112 1113 native_handle* Parcel::readNativeHandle() const 1114 { 1115 int numFds, numInts; 1116 status_t err; 1117 err = readInt32(&numFds); 1118 if (err != NO_ERROR) return 0; 1119 err = readInt32(&numInts); 1120 if (err != NO_ERROR) return 0; 1121 1122 native_handle* h = native_handle_create(numFds, numInts); 1123 for (int i=0 ; err==NO_ERROR && i<numFds ; i++) { 1124 h->data[i] = dup(readFileDescriptor()); 1125 if (h->data[i] < 0) err = BAD_VALUE; 1126 } 1127 err = read(h->data + numFds, sizeof(int)*numInts); 1128 if (err != NO_ERROR) { 1129 native_handle_close(h); 1130 native_handle_delete(h); 1131 h = 0; 1132 } 1133 return h; 1134 } 1135 1136 1137 int Parcel::readFileDescriptor() const 1138 { 1139 const flat_binder_object* flat = readObject(true); 1140 if (flat) { 1141 switch (flat->type) { 1142 case BINDER_TYPE_FD: 1143 //ALOGI("Returning file descriptor %ld from parcel %p\n", flat->handle, this); 1144 return flat->handle; 1145 } 1146 } 1147 return BAD_TYPE; 1148 } 1149 1150 status_t Parcel::readBlob(size_t len, ReadableBlob* outBlob) const 1151 { 1152 int32_t useAshmem; 1153 status_t status = readInt32(&useAshmem); 1154 if (status) return status; 1155 1156 if (!useAshmem) { 1157 ALOGV("readBlob: read in place"); 1158 const void* ptr = readInplace(len); 1159 if (!ptr) return BAD_VALUE; 1160 1161 outBlob->init(false /*mapped*/, const_cast<void*>(ptr), len); 1162 return NO_ERROR; 1163 } 1164 1165 ALOGV("readBlob: read from ashmem"); 1166 int fd = readFileDescriptor(); 1167 if (fd == int(BAD_TYPE)) return BAD_VALUE; 1168 1169 void* ptr = ::mmap(NULL, len, PROT_READ, MAP_SHARED, fd, 0); 1170 if (!ptr) return NO_MEMORY; 1171 1172 outBlob->init(true /*mapped*/, ptr, len); 1173 return NO_ERROR; 1174 } 1175 1176 status_t Parcel::read(Flattenable& val) const 1177 { 1178 // size 1179 const size_t len = this->readInt32(); 1180 const size_t fd_count = this->readInt32(); 1181 1182 // payload 1183 void const* buf = this->readInplace(PAD_SIZE(len)); 1184 if (buf == NULL) 1185 return BAD_VALUE; 1186 1187 int* fds = NULL; 1188 if (fd_count) { 1189 fds = new int[fd_count]; 1190 } 1191 1192 status_t err = NO_ERROR; 1193 for (size_t i=0 ; i<fd_count && err==NO_ERROR ; i++) { 1194 fds[i] = dup(this->readFileDescriptor()); 1195 if (fds[i] < 0) err = BAD_VALUE; 1196 } 1197 1198 if (err == NO_ERROR) { 1199 err = val.unflatten(buf, len, fds, fd_count); 1200 } 1201 1202 if (fd_count) { 1203 delete [] fds; 1204 } 1205 1206 return err; 1207 } 1208 const flat_binder_object* Parcel::readObject(bool nullMetaData) const 1209 { 1210 const size_t DPOS = mDataPos; 1211 if ((DPOS+sizeof(flat_binder_object)) <= mDataSize) { 1212 const flat_binder_object* obj 1213 = reinterpret_cast<const flat_binder_object*>(mData+DPOS); 1214 mDataPos = DPOS + sizeof(flat_binder_object); 1215 if (!nullMetaData && (obj->cookie == NULL && obj->binder == NULL)) { 1216 // When transferring a NULL object, we don't write it into 1217 // the object list, so we don't want to check for it when 1218 // reading. 1219 ALOGV("readObject Setting data pos of %p to %d\n", this, mDataPos); 1220 return obj; 1221 } 1222 1223 // Ensure that this object is valid... 1224 size_t* const OBJS = mObjects; 1225 const size_t N = mObjectsSize; 1226 size_t opos = mNextObjectHint; 1227 1228 if (N > 0) { 1229 ALOGV("Parcel %p looking for obj at %d, hint=%d\n", 1230 this, DPOS, opos); 1231 1232 // Start at the current hint position, looking for an object at 1233 // the current data position. 1234 if (opos < N) { 1235 while (opos < (N-1) && OBJS[opos] < DPOS) { 1236 opos++; 1237 } 1238 } else { 1239 opos = N-1; 1240 } 1241 if (OBJS[opos] == DPOS) { 1242 // Found it! 1243 ALOGV("Parcel found obj %d at index %d with forward search", 1244 this, DPOS, opos); 1245 mNextObjectHint = opos+1; 1246 ALOGV("readObject Setting data pos of %p to %d\n", this, mDataPos); 1247 return obj; 1248 } 1249 1250 // Look backwards for it... 1251 while (opos > 0 && OBJS[opos] > DPOS) { 1252 opos--; 1253 } 1254 if (OBJS[opos] == DPOS) { 1255 // Found it! 1256 ALOGV("Parcel found obj %d at index %d with backward search", 1257 this, DPOS, opos); 1258 mNextObjectHint = opos+1; 1259 ALOGV("readObject Setting data pos of %p to %d\n", this, mDataPos); 1260 return obj; 1261 } 1262 } 1263 ALOGW("Attempt to read object from Parcel %p at offset %d that is not in the object list", 1264 this, DPOS); 1265 } 1266 return NULL; 1267 } 1268 1269 void Parcel::closeFileDescriptors() 1270 { 1271 size_t i = mObjectsSize; 1272 if (i > 0) { 1273 //ALOGI("Closing file descriptors for %d objects...", mObjectsSize); 1274 } 1275 while (i > 0) { 1276 i--; 1277 const flat_binder_object* flat 1278 = reinterpret_cast<flat_binder_object*>(mData+mObjects[i]); 1279 if (flat->type == BINDER_TYPE_FD) { 1280 //ALOGI("Closing fd: %ld\n", flat->handle); 1281 close(flat->handle); 1282 } 1283 } 1284 } 1285 1286 const uint8_t* Parcel::ipcData() const 1287 { 1288 return mData; 1289 } 1290 1291 size_t Parcel::ipcDataSize() const 1292 { 1293 return (mDataSize > mDataPos ? mDataSize : mDataPos); 1294 } 1295 1296 const size_t* Parcel::ipcObjects() const 1297 { 1298 return mObjects; 1299 } 1300 1301 size_t Parcel::ipcObjectsCount() const 1302 { 1303 return mObjectsSize; 1304 } 1305 1306 void Parcel::ipcSetDataReference(const uint8_t* data, size_t dataSize, 1307 const size_t* objects, size_t objectsCount, release_func relFunc, void* relCookie) 1308 { 1309 freeDataNoInit(); 1310 mError = NO_ERROR; 1311 mData = const_cast<uint8_t*>(data); 1312 mDataSize = mDataCapacity = dataSize; 1313 //ALOGI("setDataReference Setting data size of %p to %lu (pid=%d)\n", this, mDataSize, getpid()); 1314 mDataPos = 0; 1315 ALOGV("setDataReference Setting data pos of %p to %d\n", this, mDataPos); 1316 mObjects = const_cast<size_t*>(objects); 1317 mObjectsSize = mObjectsCapacity = objectsCount; 1318 mNextObjectHint = 0; 1319 mOwner = relFunc; 1320 mOwnerCookie = relCookie; 1321 scanForFds(); 1322 } 1323 1324 void Parcel::print(TextOutput& to, uint32_t flags) const 1325 { 1326 to << "Parcel("; 1327 1328 if (errorCheck() != NO_ERROR) { 1329 const status_t err = errorCheck(); 1330 to << "Error: " << (void*)err << " \"" << strerror(-err) << "\""; 1331 } else if (dataSize() > 0) { 1332 const uint8_t* DATA = data(); 1333 to << indent << HexDump(DATA, dataSize()) << dedent; 1334 const size_t* OBJS = objects(); 1335 const size_t N = objectsCount(); 1336 for (size_t i=0; i<N; i++) { 1337 const flat_binder_object* flat 1338 = reinterpret_cast<const flat_binder_object*>(DATA+OBJS[i]); 1339 to << endl << "Object #" << i << " @ " << (void*)OBJS[i] << ": " 1340 << TypeCode(flat->type & 0x7f7f7f00) 1341 << " = " << flat->binder; 1342 } 1343 } else { 1344 to << "NULL"; 1345 } 1346 1347 to << ")"; 1348 } 1349 1350 void Parcel::releaseObjects() 1351 { 1352 const sp<ProcessState> proc(ProcessState::self()); 1353 size_t i = mObjectsSize; 1354 uint8_t* const data = mData; 1355 size_t* const objects = mObjects; 1356 while (i > 0) { 1357 i--; 1358 const flat_binder_object* flat 1359 = reinterpret_cast<flat_binder_object*>(data+objects[i]); 1360 release_object(proc, *flat, this); 1361 } 1362 } 1363 1364 void Parcel::acquireObjects() 1365 { 1366 const sp<ProcessState> proc(ProcessState::self()); 1367 size_t i = mObjectsSize; 1368 uint8_t* const data = mData; 1369 size_t* const objects = mObjects; 1370 while (i > 0) { 1371 i--; 1372 const flat_binder_object* flat 1373 = reinterpret_cast<flat_binder_object*>(data+objects[i]); 1374 acquire_object(proc, *flat, this); 1375 } 1376 } 1377 1378 void Parcel::freeData() 1379 { 1380 freeDataNoInit(); 1381 initState(); 1382 } 1383 1384 void Parcel::freeDataNoInit() 1385 { 1386 if (mOwner) { 1387 //ALOGI("Freeing data ref of %p (pid=%d)\n", this, getpid()); 1388 mOwner(this, mData, mDataSize, mObjects, mObjectsSize, mOwnerCookie); 1389 } else { 1390 releaseObjects(); 1391 if (mData) free(mData); 1392 if (mObjects) free(mObjects); 1393 } 1394 } 1395 1396 status_t Parcel::growData(size_t len) 1397 { 1398 size_t newSize = ((mDataSize+len)*3)/2; 1399 return (newSize <= mDataSize) 1400 ? (status_t) NO_MEMORY 1401 : continueWrite(newSize); 1402 } 1403 1404 status_t Parcel::restartWrite(size_t desired) 1405 { 1406 if (mOwner) { 1407 freeData(); 1408 return continueWrite(desired); 1409 } 1410 1411 uint8_t* data = (uint8_t*)realloc(mData, desired); 1412 if (!data && desired > mDataCapacity) { 1413 mError = NO_MEMORY; 1414 return NO_MEMORY; 1415 } 1416 1417 releaseObjects(); 1418 1419 if (data) { 1420 mData = data; 1421 mDataCapacity = desired; 1422 } 1423 1424 mDataSize = mDataPos = 0; 1425 ALOGV("restartWrite Setting data size of %p to %d\n", this, mDataSize); 1426 ALOGV("restartWrite Setting data pos of %p to %d\n", this, mDataPos); 1427 1428 free(mObjects); 1429 mObjects = NULL; 1430 mObjectsSize = mObjectsCapacity = 0; 1431 mNextObjectHint = 0; 1432 mHasFds = false; 1433 mFdsKnown = true; 1434 mAllowFds = true; 1435 1436 return NO_ERROR; 1437 } 1438 1439 status_t Parcel::continueWrite(size_t desired) 1440 { 1441 // If shrinking, first adjust for any objects that appear 1442 // after the new data size. 1443 size_t objectsSize = mObjectsSize; 1444 if (desired < mDataSize) { 1445 if (desired == 0) { 1446 objectsSize = 0; 1447 } else { 1448 while (objectsSize > 0) { 1449 if (mObjects[objectsSize-1] < desired) 1450 break; 1451 objectsSize--; 1452 } 1453 } 1454 } 1455 1456 if (mOwner) { 1457 // If the size is going to zero, just release the owner's data. 1458 if (desired == 0) { 1459 freeData(); 1460 return NO_ERROR; 1461 } 1462 1463 // If there is a different owner, we need to take 1464 // posession. 1465 uint8_t* data = (uint8_t*)malloc(desired); 1466 if (!data) { 1467 mError = NO_MEMORY; 1468 return NO_MEMORY; 1469 } 1470 size_t* objects = NULL; 1471 1472 if (objectsSize) { 1473 objects = (size_t*)malloc(objectsSize*sizeof(size_t)); 1474 if (!objects) { 1475 mError = NO_MEMORY; 1476 return NO_MEMORY; 1477 } 1478 1479 // Little hack to only acquire references on objects 1480 // we will be keeping. 1481 size_t oldObjectsSize = mObjectsSize; 1482 mObjectsSize = objectsSize; 1483 acquireObjects(); 1484 mObjectsSize = oldObjectsSize; 1485 } 1486 1487 if (mData) { 1488 memcpy(data, mData, mDataSize < desired ? mDataSize : desired); 1489 } 1490 if (objects && mObjects) { 1491 memcpy(objects, mObjects, objectsSize*sizeof(size_t)); 1492 } 1493 //ALOGI("Freeing data ref of %p (pid=%d)\n", this, getpid()); 1494 mOwner(this, mData, mDataSize, mObjects, mObjectsSize, mOwnerCookie); 1495 mOwner = NULL; 1496 1497 mData = data; 1498 mObjects = objects; 1499 mDataSize = (mDataSize < desired) ? mDataSize : desired; 1500 ALOGV("continueWrite Setting data size of %p to %d\n", this, mDataSize); 1501 mDataCapacity = desired; 1502 mObjectsSize = mObjectsCapacity = objectsSize; 1503 mNextObjectHint = 0; 1504 1505 } else if (mData) { 1506 if (objectsSize < mObjectsSize) { 1507 // Need to release refs on any objects we are dropping. 1508 const sp<ProcessState> proc(ProcessState::self()); 1509 for (size_t i=objectsSize; i<mObjectsSize; i++) { 1510 const flat_binder_object* flat 1511 = reinterpret_cast<flat_binder_object*>(mData+mObjects[i]); 1512 if (flat->type == BINDER_TYPE_FD) { 1513 // will need to rescan because we may have lopped off the only FDs 1514 mFdsKnown = false; 1515 } 1516 release_object(proc, *flat, this); 1517 } 1518 size_t* objects = 1519 (size_t*)realloc(mObjects, objectsSize*sizeof(size_t)); 1520 if (objects) { 1521 mObjects = objects; 1522 } 1523 mObjectsSize = objectsSize; 1524 mNextObjectHint = 0; 1525 } 1526 1527 // We own the data, so we can just do a realloc(). 1528 if (desired > mDataCapacity) { 1529 uint8_t* data = (uint8_t*)realloc(mData, desired); 1530 if (data) { 1531 mData = data; 1532 mDataCapacity = desired; 1533 } else if (desired > mDataCapacity) { 1534 mError = NO_MEMORY; 1535 return NO_MEMORY; 1536 } 1537 } else { 1538 if (mDataSize > desired) { 1539 mDataSize = desired; 1540 ALOGV("continueWrite Setting data size of %p to %d\n", this, mDataSize); 1541 } 1542 if (mDataPos > desired) { 1543 mDataPos = desired; 1544 ALOGV("continueWrite Setting data pos of %p to %d\n", this, mDataPos); 1545 } 1546 } 1547 1548 } else { 1549 // This is the first data. Easy! 1550 uint8_t* data = (uint8_t*)malloc(desired); 1551 if (!data) { 1552 mError = NO_MEMORY; 1553 return NO_MEMORY; 1554 } 1555 1556 if(!(mDataCapacity == 0 && mObjects == NULL 1557 && mObjectsCapacity == 0)) { 1558 ALOGE("continueWrite: %d/%p/%d/%d", mDataCapacity, mObjects, mObjectsCapacity, desired); 1559 } 1560 1561 mData = data; 1562 mDataSize = mDataPos = 0; 1563 ALOGV("continueWrite Setting data size of %p to %d\n", this, mDataSize); 1564 ALOGV("continueWrite Setting data pos of %p to %d\n", this, mDataPos); 1565 mDataCapacity = desired; 1566 } 1567 1568 return NO_ERROR; 1569 } 1570 1571 void Parcel::initState() 1572 { 1573 mError = NO_ERROR; 1574 mData = 0; 1575 mDataSize = 0; 1576 mDataCapacity = 0; 1577 mDataPos = 0; 1578 ALOGV("initState Setting data size of %p to %d\n", this, mDataSize); 1579 ALOGV("initState Setting data pos of %p to %d\n", this, mDataPos); 1580 mObjects = NULL; 1581 mObjectsSize = 0; 1582 mObjectsCapacity = 0; 1583 mNextObjectHint = 0; 1584 mHasFds = false; 1585 mFdsKnown = true; 1586 mAllowFds = true; 1587 mOwner = NULL; 1588 } 1589 1590 void Parcel::scanForFds() const 1591 { 1592 bool hasFds = false; 1593 for (size_t i=0; i<mObjectsSize; i++) { 1594 const flat_binder_object* flat 1595 = reinterpret_cast<const flat_binder_object*>(mData + mObjects[i]); 1596 if (flat->type == BINDER_TYPE_FD) { 1597 hasFds = true; 1598 break; 1599 } 1600 } 1601 mHasFds = hasFds; 1602 mFdsKnown = true; 1603 } 1604 1605 // --- Parcel::Blob --- 1606 1607 Parcel::Blob::Blob() : 1608 mMapped(false), mData(NULL), mSize(0) { 1609 } 1610 1611 Parcel::Blob::~Blob() { 1612 release(); 1613 } 1614 1615 void Parcel::Blob::release() { 1616 if (mMapped && mData) { 1617 ::munmap(mData, mSize); 1618 } 1619 clear(); 1620 } 1621 1622 void Parcel::Blob::init(bool mapped, void* data, size_t size) { 1623 mMapped = mapped; 1624 mData = data; 1625 mSize = size; 1626 } 1627 1628 void Parcel::Blob::clear() { 1629 mMapped = false; 1630 mData = NULL; 1631 mSize = 0; 1632 } 1633 1634 }; // namespace android 1635
