1 /* 2 * Copyright (C) 2005 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #define LOG_TAG "Parcel" 18 //#define LOG_NDEBUG 0 19 20 #include <binder/Parcel.h> 21 22 #include <binder/IPCThreadState.h> 23 #include <binder/Binder.h> 24 #include <binder/BpBinder.h> 25 #include <binder/ProcessState.h> 26 #include <binder/TextOutput.h> 27 28 #include <utils/Debug.h> 29 #include <utils/Log.h> 30 #include <utils/String8.h> 31 #include <utils/String16.h> 32 #include <utils/misc.h> 33 #include <utils/Flattenable.h> 34 #include <cutils/ashmem.h> 35 36 #include <private/binder/binder_module.h> 37 38 #include <stdio.h> 39 #include <stdlib.h> 40 #include <stdint.h> 41 #include <sys/mman.h> 42 43 #ifndef INT32_MAX 44 #define INT32_MAX ((int32_t)(2147483647)) 45 #endif 46 47 #define LOG_REFS(...) 48 //#define LOG_REFS(...) ALOG(LOG_DEBUG, "Parcel", __VA_ARGS__) 49 50 // --------------------------------------------------------------------------- 51 52 #define PAD_SIZE(s) (((s)+3)&~3) 53 54 // Note: must be kept in sync with android/os/StrictMode.java's PENALTY_GATHER 55 #define STRICT_MODE_PENALTY_GATHER 0x100 56 57 // Note: must be kept in sync with android/os/Parcel.java's EX_HAS_REPLY_HEADER 58 #define EX_HAS_REPLY_HEADER -128 59 60 // Maximum size of a blob to transfer in-place. 61 static const size_t IN_PLACE_BLOB_LIMIT = 40 * 1024; 62 63 // XXX This can be made public if we want to provide 64 // support for typed data. 65 struct small_flat_data 66 { 67 uint32_t type; 68 uint32_t data; 69 }; 70 71 namespace android { 72 73 void acquire_object(const sp<ProcessState>& proc, 74 const flat_binder_object& obj, const void* who) 75 { 76 switch (obj.type) { 77 case BINDER_TYPE_BINDER: 78 if (obj.binder) { 79 LOG_REFS("Parcel %p acquiring reference on local %p", who, obj.cookie); 80 static_cast<IBinder*>(obj.cookie)->incStrong(who); 81 } 82 return; 83 case BINDER_TYPE_WEAK_BINDER: 84 if (obj.binder) 85 static_cast<RefBase::weakref_type*>(obj.binder)->incWeak(who); 86 return; 87 case BINDER_TYPE_HANDLE: { 88 const sp<IBinder> b = proc->getStrongProxyForHandle(obj.handle); 89 if (b != NULL) { 90 LOG_REFS("Parcel %p acquiring reference on remote %p", who, b.get()); 91 b->incStrong(who); 92 } 93 return; 94 } 95 case BINDER_TYPE_WEAK_HANDLE: { 96 const wp<IBinder> b = proc->getWeakProxyForHandle(obj.handle); 97 if (b != NULL) b.get_refs()->incWeak(who); 98 return; 99 } 100 case BINDER_TYPE_FD: { 101 // intentionally blank -- nothing to do to acquire this, but we do 102 // recognize it as a legitimate object type. 103 return; 104 } 105 } 106 107 ALOGD("Invalid object type 0x%08lx", obj.type); 108 } 109 110 void release_object(const sp<ProcessState>& proc, 111 const flat_binder_object& obj, const void* who) 112 { 113 switch (obj.type) { 114 case BINDER_TYPE_BINDER: 115 if (obj.binder) { 116 LOG_REFS("Parcel %p releasing reference on local %p", who, obj.cookie); 117 static_cast<IBinder*>(obj.cookie)->decStrong(who); 118 } 119 return; 120 case BINDER_TYPE_WEAK_BINDER: 121 if (obj.binder) 122 static_cast<RefBase::weakref_type*>(obj.binder)->decWeak(who); 123 return; 124 case BINDER_TYPE_HANDLE: { 125 const sp<IBinder> b = proc->getStrongProxyForHandle(obj.handle); 126 if (b != NULL) { 127 LOG_REFS("Parcel %p releasing reference on remote %p", who, b.get()); 128 b->decStrong(who); 129 } 130 return; 131 } 132 case BINDER_TYPE_WEAK_HANDLE: { 133 const wp<IBinder> b = proc->getWeakProxyForHandle(obj.handle); 134 if (b != NULL) b.get_refs()->decWeak(who); 135 return; 136 } 137 case BINDER_TYPE_FD: { 138 if (obj.cookie != (void*)0) close(obj.handle); 139 return; 140 } 141 } 142 143 ALOGE("Invalid object type 0x%08lx", obj.type); 144 } 145 146 inline static status_t finish_flatten_binder( 147 const sp<IBinder>& binder, const flat_binder_object& flat, Parcel* out) 148 { 149 return out->writeObject(flat, false); 150 } 151 152 status_t flatten_binder(const sp<ProcessState>& proc, 153 const sp<IBinder>& binder, Parcel* out) 154 { 155 flat_binder_object obj; 156 157 obj.flags = 0x7f | FLAT_BINDER_FLAG_ACCEPTS_FDS; 158 if (binder != NULL) { 159 IBinder *local = binder->localBinder(); 160 if (!local) { 161 BpBinder *proxy = binder->remoteBinder(); 162 if (proxy == NULL) { 163 ALOGE("null proxy"); 164 } 165 const int32_t handle = proxy ? proxy->handle() : 0; 166 obj.type = BINDER_TYPE_HANDLE; 167 obj.handle = handle; 168 obj.cookie = NULL; 169 } else { 170 obj.type = BINDER_TYPE_BINDER; 171 obj.binder = local->getWeakRefs(); 172 obj.cookie = local; 173 } 174 } else { 175 obj.type = BINDER_TYPE_BINDER; 176 obj.binder = NULL; 177 obj.cookie = NULL; 178 } 179 180 return finish_flatten_binder(binder, obj, out); 181 } 182 183 status_t flatten_binder(const sp<ProcessState>& proc, 184 const wp<IBinder>& binder, Parcel* out) 185 { 186 flat_binder_object obj; 187 188 obj.flags = 0x7f | FLAT_BINDER_FLAG_ACCEPTS_FDS; 189 if (binder != NULL) { 190 sp<IBinder> real = binder.promote(); 191 if (real != NULL) { 192 IBinder *local = real->localBinder(); 193 if (!local) { 194 BpBinder *proxy = real->remoteBinder(); 195 if (proxy == NULL) { 196 ALOGE("null proxy"); 197 } 198 const int32_t handle = proxy ? proxy->handle() : 0; 199 obj.type = BINDER_TYPE_WEAK_HANDLE; 200 obj.handle = handle; 201 obj.cookie = NULL; 202 } else { 203 obj.type = BINDER_TYPE_WEAK_BINDER; 204 obj.binder = binder.get_refs(); 205 obj.cookie = binder.unsafe_get(); 206 } 207 return finish_flatten_binder(real, obj, out); 208 } 209 210 // XXX How to deal? In order to flatten the given binder, 211 // we need to probe it for information, which requires a primary 212 // reference... but we don't have one. 213 // 214 // The OpenBinder implementation uses a dynamic_cast<> here, 215 // but we can't do that with the different reference counting 216 // implementation we are using. 217 ALOGE("Unable to unflatten Binder weak reference!"); 218 obj.type = BINDER_TYPE_BINDER; 219 obj.binder = NULL; 220 obj.cookie = NULL; 221 return finish_flatten_binder(NULL, obj, out); 222 223 } else { 224 obj.type = BINDER_TYPE_BINDER; 225 obj.binder = NULL; 226 obj.cookie = NULL; 227 return finish_flatten_binder(NULL, obj, out); 228 } 229 } 230 231 inline static status_t finish_unflatten_binder( 232 BpBinder* proxy, const flat_binder_object& flat, const Parcel& in) 233 { 234 return NO_ERROR; 235 } 236 237 status_t unflatten_binder(const sp<ProcessState>& proc, 238 const Parcel& in, sp<IBinder>* out) 239 { 240 const flat_binder_object* flat = in.readObject(false); 241 242 if (flat) { 243 switch (flat->type) { 244 case BINDER_TYPE_BINDER: 245 *out = static_cast<IBinder*>(flat->cookie); 246 return finish_unflatten_binder(NULL, *flat, in); 247 case BINDER_TYPE_HANDLE: 248 *out = proc->getStrongProxyForHandle(flat->handle); 249 return finish_unflatten_binder( 250 static_cast<BpBinder*>(out->get()), *flat, in); 251 } 252 } 253 return BAD_TYPE; 254 } 255 256 status_t unflatten_binder(const sp<ProcessState>& proc, 257 const Parcel& in, wp<IBinder>* out) 258 { 259 const flat_binder_object* flat = in.readObject(false); 260 261 if (flat) { 262 switch (flat->type) { 263 case BINDER_TYPE_BINDER: 264 *out = static_cast<IBinder*>(flat->cookie); 265 return finish_unflatten_binder(NULL, *flat, in); 266 case BINDER_TYPE_WEAK_BINDER: 267 if (flat->binder != NULL) { 268 out->set_object_and_refs( 269 static_cast<IBinder*>(flat->cookie), 270 static_cast<RefBase::weakref_type*>(flat->binder)); 271 } else { 272 *out = NULL; 273 } 274 return finish_unflatten_binder(NULL, *flat, in); 275 case BINDER_TYPE_HANDLE: 276 case BINDER_TYPE_WEAK_HANDLE: 277 *out = proc->getWeakProxyForHandle(flat->handle); 278 return finish_unflatten_binder( 279 static_cast<BpBinder*>(out->unsafe_get()), *flat, in); 280 } 281 } 282 return BAD_TYPE; 283 } 284 285 // --------------------------------------------------------------------------- 286 287 Parcel::Parcel() 288 { 289 initState(); 290 } 291 292 Parcel::~Parcel() 293 { 294 freeDataNoInit(); 295 } 296 297 const uint8_t* Parcel::data() const 298 { 299 return mData; 300 } 301 302 size_t Parcel::dataSize() const 303 { 304 return (mDataSize > mDataPos ? mDataSize : mDataPos); 305 } 306 307 size_t Parcel::dataAvail() const 308 { 309 // TODO: decide what to do about the possibility that this can 310 // report an available-data size that exceeds a Java int's max 311 // positive value, causing havoc. Fortunately this will only 312 // happen if someone constructs a Parcel containing more than two 313 // gigabytes of data, which on typical phone hardware is simply 314 // not possible. 315 return dataSize() - dataPosition(); 316 } 317 318 size_t Parcel::dataPosition() const 319 { 320 return mDataPos; 321 } 322 323 size_t Parcel::dataCapacity() const 324 { 325 return mDataCapacity; 326 } 327 328 status_t Parcel::setDataSize(size_t size) 329 { 330 status_t err; 331 err = continueWrite(size); 332 if (err == NO_ERROR) { 333 mDataSize = size; 334 ALOGV("setDataSize Setting data size of %p to %d\n", this, mDataSize); 335 } 336 return err; 337 } 338 339 void Parcel::setDataPosition(size_t pos) const 340 { 341 mDataPos = pos; 342 mNextObjectHint = 0; 343 } 344 345 status_t Parcel::setDataCapacity(size_t size) 346 { 347 if (size > mDataCapacity) return continueWrite(size); 348 return NO_ERROR; 349 } 350 351 status_t Parcel::setData(const uint8_t* buffer, size_t len) 352 { 353 status_t err = restartWrite(len); 354 if (err == NO_ERROR) { 355 memcpy(const_cast<uint8_t*>(data()), buffer, len); 356 mDataSize = len; 357 mFdsKnown = false; 358 } 359 return err; 360 } 361 362 status_t Parcel::appendFrom(const Parcel *parcel, size_t offset, size_t len) 363 { 364 const sp<ProcessState> proc(ProcessState::self()); 365 status_t err; 366 const uint8_t *data = parcel->mData; 367 const size_t *objects = parcel->mObjects; 368 size_t size = parcel->mObjectsSize; 369 int startPos = mDataPos; 370 int firstIndex = -1, lastIndex = -2; 371 372 if (len == 0) { 373 return NO_ERROR; 374 } 375 376 // range checks against the source parcel size 377 if ((offset > parcel->mDataSize) 378 || (len > parcel->mDataSize) 379 || (offset + len > parcel->mDataSize)) { 380 return BAD_VALUE; 381 } 382 383 // Count objects in range 384 for (int i = 0; i < (int) size; i++) { 385 size_t off = objects[i]; 386 if ((off >= offset) && (off < offset + len)) { 387 if (firstIndex == -1) { 388 firstIndex = i; 389 } 390 lastIndex = i; 391 } 392 } 393 int numObjects = lastIndex - firstIndex + 1; 394 395 if ((mDataSize+len) > mDataCapacity) { 396 // grow data 397 err = growData(len); 398 if (err != NO_ERROR) { 399 return err; 400 } 401 } 402 403 // append data 404 memcpy(mData + mDataPos, data + offset, len); 405 mDataPos += len; 406 mDataSize += len; 407 408 err = NO_ERROR; 409 410 if (numObjects > 0) { 411 // grow objects 412 if (mObjectsCapacity < mObjectsSize + numObjects) { 413 int newSize = ((mObjectsSize + numObjects)*3)/2; 414 size_t *objects = 415 (size_t*)realloc(mObjects, newSize*sizeof(size_t)); 416 if (objects == (size_t*)0) { 417 return NO_MEMORY; 418 } 419 mObjects = objects; 420 mObjectsCapacity = newSize; 421 } 422 423 // append and acquire objects 424 int idx = mObjectsSize; 425 for (int i = firstIndex; i <= lastIndex; i++) { 426 size_t off = objects[i] - offset + startPos; 427 mObjects[idx++] = off; 428 mObjectsSize++; 429 430 flat_binder_object* flat 431 = reinterpret_cast<flat_binder_object*>(mData + off); 432 acquire_object(proc, *flat, this); 433 434 if (flat->type == BINDER_TYPE_FD) { 435 // If this is a file descriptor, we need to dup it so the 436 // new Parcel now owns its own fd, and can declare that we 437 // officially know we have fds. 438 flat->handle = dup(flat->handle); 439 flat->cookie = (void*)1; 440 mHasFds = mFdsKnown = true; 441 if (!mAllowFds) { 442 err = FDS_NOT_ALLOWED; 443 } 444 } 445 } 446 } 447 448 return err; 449 } 450 451 bool Parcel::pushAllowFds(bool allowFds) 452 { 453 const bool origValue = mAllowFds; 454 if (!allowFds) { 455 mAllowFds = false; 456 } 457 return origValue; 458 } 459 460 void Parcel::restoreAllowFds(bool lastValue) 461 { 462 mAllowFds = lastValue; 463 } 464 465 bool Parcel::hasFileDescriptors() const 466 { 467 if (!mFdsKnown) { 468 scanForFds(); 469 } 470 return mHasFds; 471 } 472 473 // Write RPC headers. (previously just the interface token) 474 status_t Parcel::writeInterfaceToken(const String16& interface) 475 { 476 writeInt32(IPCThreadState::self()->getStrictModePolicy() | 477 STRICT_MODE_PENALTY_GATHER); 478 // currently the interface identification token is just its name as a string 479 return writeString16(interface); 480 } 481 482 bool Parcel::checkInterface(IBinder* binder) const 483 { 484 return enforceInterface(binder->getInterfaceDescriptor()); 485 } 486 487 bool Parcel::enforceInterface(const String16& interface, 488 IPCThreadState* threadState) const 489 { 490 int32_t strictPolicy = readInt32(); 491 if (threadState == NULL) { 492 threadState = IPCThreadState::self(); 493 } 494 if ((threadState->getLastTransactionBinderFlags() & 495 IBinder::FLAG_ONEWAY) != 0) { 496 // For one-way calls, the callee is running entirely 497 // disconnected from the caller, so disable StrictMode entirely. 498 // Not only does disk/network usage not impact the caller, but 499 // there's no way to commuicate back any violations anyway. 500 threadState->setStrictModePolicy(0); 501 } else { 502 threadState->setStrictModePolicy(strictPolicy); 503 } 504 const String16 str(readString16()); 505 if (str == interface) { 506 return true; 507 } else { 508 ALOGW("**** enforceInterface() expected '%s' but read '%s'\n", 509 String8(interface).string(), String8(str).string()); 510 return false; 511 } 512 } 513 514 const size_t* Parcel::objects() const 515 { 516 return mObjects; 517 } 518 519 size_t Parcel::objectsCount() const 520 { 521 return mObjectsSize; 522 } 523 524 status_t Parcel::errorCheck() const 525 { 526 return mError; 527 } 528 529 void Parcel::setError(status_t err) 530 { 531 mError = err; 532 } 533 534 status_t Parcel::finishWrite(size_t len) 535 { 536 //printf("Finish write of %d\n", len); 537 mDataPos += len; 538 ALOGV("finishWrite Setting data pos of %p to %d\n", this, mDataPos); 539 if (mDataPos > mDataSize) { 540 mDataSize = mDataPos; 541 ALOGV("finishWrite Setting data size of %p to %d\n", this, mDataSize); 542 } 543 //printf("New pos=%d, size=%d\n", mDataPos, mDataSize); 544 return NO_ERROR; 545 } 546 547 status_t Parcel::writeUnpadded(const void* data, size_t len) 548 { 549 size_t end = mDataPos + len; 550 if (end < mDataPos) { 551 // integer overflow 552 return BAD_VALUE; 553 } 554 555 if (end <= mDataCapacity) { 556 restart_write: 557 memcpy(mData+mDataPos, data, len); 558 return finishWrite(len); 559 } 560 561 status_t err = growData(len); 562 if (err == NO_ERROR) goto restart_write; 563 return err; 564 } 565 566 status_t Parcel::write(const void* data, size_t len) 567 { 568 void* const d = writeInplace(len); 569 if (d) { 570 memcpy(d, data, len); 571 return NO_ERROR; 572 } 573 return mError; 574 } 575 576 void* Parcel::writeInplace(size_t len) 577 { 578 const size_t padded = PAD_SIZE(len); 579 580 // sanity check for integer overflow 581 if (mDataPos+padded < mDataPos) { 582 return NULL; 583 } 584 585 if ((mDataPos+padded) <= mDataCapacity) { 586 restart_write: 587 //printf("Writing %ld bytes, padded to %ld\n", len, padded); 588 uint8_t* const data = mData+mDataPos; 589 590 // Need to pad at end? 591 if (padded != len) { 592 #if BYTE_ORDER == BIG_ENDIAN 593 static const uint32_t mask[4] = { 594 0x00000000, 0xffffff00, 0xffff0000, 0xff000000 595 }; 596 #endif 597 #if BYTE_ORDER == LITTLE_ENDIAN 598 static const uint32_t mask[4] = { 599 0x00000000, 0x00ffffff, 0x0000ffff, 0x000000ff 600 }; 601 #endif 602 //printf("Applying pad mask: %p to %p\n", (void*)mask[padded-len], 603 // *reinterpret_cast<void**>(data+padded-4)); 604 *reinterpret_cast<uint32_t*>(data+padded-4) &= mask[padded-len]; 605 } 606 607 finishWrite(padded); 608 return data; 609 } 610 611 status_t err = growData(padded); 612 if (err == NO_ERROR) goto restart_write; 613 return NULL; 614 } 615 616 status_t Parcel::writeInt32(int32_t val) 617 { 618 return writeAligned(val); 619 } 620 621 status_t Parcel::writeInt64(int64_t val) 622 { 623 return writeAligned(val); 624 } 625 626 status_t Parcel::writeFloat(float val) 627 { 628 return writeAligned(val); 629 } 630 631 #if defined(__mips__) && defined(__mips_hard_float) 632 633 status_t Parcel::writeDouble(double val) 634 { 635 union { 636 double d; 637 unsigned long long ll; 638 } u; 639 u.d = val; 640 return writeAligned(u.ll); 641 } 642 643 #else 644 645 status_t Parcel::writeDouble(double val) 646 { 647 return writeAligned(val); 648 } 649 650 #endif 651 652 status_t Parcel::writeIntPtr(intptr_t val) 653 { 654 return writeAligned(val); 655 } 656 657 status_t Parcel::writeCString(const char* str) 658 { 659 return write(str, strlen(str)+1); 660 } 661 662 status_t Parcel::writeString8(const String8& str) 663 { 664 status_t err = writeInt32(str.bytes()); 665 // only write string if its length is more than zero characters, 666 // as readString8 will only read if the length field is non-zero. 667 // this is slightly different from how writeString16 works. 668 if (str.bytes() > 0 && err == NO_ERROR) { 669 err = write(str.string(), str.bytes()+1); 670 } 671 return err; 672 } 673 674 status_t Parcel::writeString16(const String16& str) 675 { 676 return writeString16(str.string(), str.size()); 677 } 678 679 status_t Parcel::writeString16(const char16_t* str, size_t len) 680 { 681 if (str == NULL) return writeInt32(-1); 682 683 status_t err = writeInt32(len); 684 if (err == NO_ERROR) { 685 len *= sizeof(char16_t); 686 uint8_t* data = (uint8_t*)writeInplace(len+sizeof(char16_t)); 687 if (data) { 688 memcpy(data, str, len); 689 *reinterpret_cast<char16_t*>(data+len) = 0; 690 return NO_ERROR; 691 } 692 err = mError; 693 } 694 return err; 695 } 696 697 status_t Parcel::writeStrongBinder(const sp<IBinder>& val) 698 { 699 return flatten_binder(ProcessState::self(), val, this); 700 } 701 702 status_t Parcel::writeWeakBinder(const wp<IBinder>& val) 703 { 704 return flatten_binder(ProcessState::self(), val, this); 705 } 706 707 status_t Parcel::writeNativeHandle(const native_handle* handle) 708 { 709 if (!handle || handle->version != sizeof(native_handle)) 710 return BAD_TYPE; 711 712 status_t err; 713 err = writeInt32(handle->numFds); 714 if (err != NO_ERROR) return err; 715 716 err = writeInt32(handle->numInts); 717 if (err != NO_ERROR) return err; 718 719 for (int i=0 ; err==NO_ERROR && i<handle->numFds ; i++) 720 err = writeDupFileDescriptor(handle->data[i]); 721 722 if (err != NO_ERROR) { 723 ALOGD("write native handle, write dup fd failed"); 724 return err; 725 } 726 err = write(handle->data + handle->numFds, sizeof(int)*handle->numInts); 727 return err; 728 } 729 730 status_t Parcel::writeFileDescriptor(int fd, bool takeOwnership) 731 { 732 flat_binder_object obj; 733 obj.type = BINDER_TYPE_FD; 734 obj.flags = 0x7f | FLAT_BINDER_FLAG_ACCEPTS_FDS; 735 obj.handle = fd; 736 obj.cookie = (void*) (takeOwnership ? 1 : 0); 737 return writeObject(obj, true); 738 } 739 740 status_t Parcel::writeDupFileDescriptor(int fd) 741 { 742 int dupFd = dup(fd); 743 if (dupFd < 0) { 744 return -errno; 745 } 746 status_t err = writeFileDescriptor(dupFd, true /*takeOwnership*/); 747 if (err) { 748 close(dupFd); 749 } 750 return err; 751 } 752 753 status_t Parcel::writeBlob(size_t len, WritableBlob* outBlob) 754 { 755 status_t status; 756 757 if (!mAllowFds || len <= IN_PLACE_BLOB_LIMIT) { 758 ALOGV("writeBlob: write in place"); 759 status = writeInt32(0); 760 if (status) return status; 761 762 void* ptr = writeInplace(len); 763 if (!ptr) return NO_MEMORY; 764 765 outBlob->init(false /*mapped*/, ptr, len); 766 return NO_ERROR; 767 } 768 769 ALOGV("writeBlob: write to ashmem"); 770 int fd = ashmem_create_region("Parcel Blob", len); 771 if (fd < 0) return NO_MEMORY; 772 773 int result = ashmem_set_prot_region(fd, PROT_READ | PROT_WRITE); 774 if (result < 0) { 775 status = result; 776 } else { 777 void* ptr = ::mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); 778 if (ptr == MAP_FAILED) { 779 status = -errno; 780 } else { 781 result = ashmem_set_prot_region(fd, PROT_READ); 782 if (result < 0) { 783 status = result; 784 } else { 785 status = writeInt32(1); 786 if (!status) { 787 status = writeFileDescriptor(fd, true /*takeOwnership*/); 788 if (!status) { 789 outBlob->init(true /*mapped*/, ptr, len); 790 return NO_ERROR; 791 } 792 } 793 } 794 } 795 ::munmap(ptr, len); 796 } 797 ::close(fd); 798 return status; 799 } 800 801 status_t Parcel::write(const FlattenableHelperInterface& val) 802 { 803 status_t err; 804 805 // size if needed 806 const size_t len = val.getFlattenedSize(); 807 const size_t fd_count = val.getFdCount(); 808 809 err = this->writeInt32(len); 810 if (err) return err; 811 812 err = this->writeInt32(fd_count); 813 if (err) return err; 814 815 // payload 816 void* const buf = this->writeInplace(PAD_SIZE(len)); 817 if (buf == NULL) 818 return BAD_VALUE; 819 820 int* fds = NULL; 821 if (fd_count) { 822 fds = new int[fd_count]; 823 } 824 825 err = val.flatten(buf, len, fds, fd_count); 826 for (size_t i=0 ; i<fd_count && err==NO_ERROR ; i++) { 827 err = this->writeDupFileDescriptor( fds[i] ); 828 } 829 830 if (fd_count) { 831 delete [] fds; 832 } 833 834 return err; 835 } 836 837 status_t Parcel::writeObject(const flat_binder_object& val, bool nullMetaData) 838 { 839 const bool enoughData = (mDataPos+sizeof(val)) <= mDataCapacity; 840 const bool enoughObjects = mObjectsSize < mObjectsCapacity; 841 if (enoughData && enoughObjects) { 842 restart_write: 843 *reinterpret_cast<flat_binder_object*>(mData+mDataPos) = val; 844 845 // Need to write meta-data? 846 if (nullMetaData || val.binder != NULL) { 847 mObjects[mObjectsSize] = mDataPos; 848 acquire_object(ProcessState::self(), val, this); 849 mObjectsSize++; 850 } 851 852 // remember if it's a file descriptor 853 if (val.type == BINDER_TYPE_FD) { 854 if (!mAllowFds) { 855 return FDS_NOT_ALLOWED; 856 } 857 mHasFds = mFdsKnown = true; 858 } 859 860 return finishWrite(sizeof(flat_binder_object)); 861 } 862 863 if (!enoughData) { 864 const status_t err = growData(sizeof(val)); 865 if (err != NO_ERROR) return err; 866 } 867 if (!enoughObjects) { 868 size_t newSize = ((mObjectsSize+2)*3)/2; 869 size_t* objects = (size_t*)realloc(mObjects, newSize*sizeof(size_t)); 870 if (objects == NULL) return NO_MEMORY; 871 mObjects = objects; 872 mObjectsCapacity = newSize; 873 } 874 875 goto restart_write; 876 } 877 878 status_t Parcel::writeNoException() 879 { 880 return writeInt32(0); 881 } 882 883 void Parcel::remove(size_t start, size_t amt) 884 { 885 LOG_ALWAYS_FATAL("Parcel::remove() not yet implemented!"); 886 } 887 888 status_t Parcel::read(void* outData, size_t len) const 889 { 890 if ((mDataPos+PAD_SIZE(len)) >= mDataPos && (mDataPos+PAD_SIZE(len)) <= mDataSize) { 891 memcpy(outData, mData+mDataPos, len); 892 mDataPos += PAD_SIZE(len); 893 ALOGV("read Setting data pos of %p to %d\n", this, mDataPos); 894 return NO_ERROR; 895 } 896 return NOT_ENOUGH_DATA; 897 } 898 899 const void* Parcel::readInplace(size_t len) const 900 { 901 if ((mDataPos+PAD_SIZE(len)) >= mDataPos && (mDataPos+PAD_SIZE(len)) <= mDataSize) { 902 const void* data = mData+mDataPos; 903 mDataPos += PAD_SIZE(len); 904 ALOGV("readInplace Setting data pos of %p to %d\n", this, mDataPos); 905 return data; 906 } 907 return NULL; 908 } 909 910 template<class T> 911 status_t Parcel::readAligned(T *pArg) const { 912 COMPILE_TIME_ASSERT_FUNCTION_SCOPE(PAD_SIZE(sizeof(T)) == sizeof(T)); 913 914 if ((mDataPos+sizeof(T)) <= mDataSize) { 915 const void* data = mData+mDataPos; 916 mDataPos += sizeof(T); 917 *pArg = *reinterpret_cast<const T*>(data); 918 return NO_ERROR; 919 } else { 920 return NOT_ENOUGH_DATA; 921 } 922 } 923 924 template<class T> 925 T Parcel::readAligned() const { 926 T result; 927 if (readAligned(&result) != NO_ERROR) { 928 result = 0; 929 } 930 931 return result; 932 } 933 934 template<class T> 935 status_t Parcel::writeAligned(T val) { 936 COMPILE_TIME_ASSERT_FUNCTION_SCOPE(PAD_SIZE(sizeof(T)) == sizeof(T)); 937 938 if ((mDataPos+sizeof(val)) <= mDataCapacity) { 939 restart_write: 940 *reinterpret_cast<T*>(mData+mDataPos) = val; 941 return finishWrite(sizeof(val)); 942 } 943 944 status_t err = growData(sizeof(val)); 945 if (err == NO_ERROR) goto restart_write; 946 return err; 947 } 948 949 status_t Parcel::readInt32(int32_t *pArg) const 950 { 951 return readAligned(pArg); 952 } 953 954 int32_t Parcel::readInt32() const 955 { 956 return readAligned<int32_t>(); 957 } 958 959 960 status_t Parcel::readInt64(int64_t *pArg) const 961 { 962 return readAligned(pArg); 963 } 964 965 966 int64_t Parcel::readInt64() const 967 { 968 return readAligned<int64_t>(); 969 } 970 971 status_t Parcel::readFloat(float *pArg) const 972 { 973 return readAligned(pArg); 974 } 975 976 977 float Parcel::readFloat() const 978 { 979 return readAligned<float>(); 980 } 981 982 #if defined(__mips__) && defined(__mips_hard_float) 983 984 status_t Parcel::readDouble(double *pArg) const 985 { 986 union { 987 double d; 988 unsigned long long ll; 989 } u; 990 status_t status; 991 status = readAligned(&u.ll); 992 *pArg = u.d; 993 return status; 994 } 995 996 double Parcel::readDouble() const 997 { 998 union { 999 double d; 1000 unsigned long long ll; 1001 } u; 1002 u.ll = readAligned<unsigned long long>(); 1003 return u.d; 1004 } 1005 1006 #else 1007 1008 status_t Parcel::readDouble(double *pArg) const 1009 { 1010 return readAligned(pArg); 1011 } 1012 1013 double Parcel::readDouble() const 1014 { 1015 return readAligned<double>(); 1016 } 1017 1018 #endif 1019 1020 status_t Parcel::readIntPtr(intptr_t *pArg) const 1021 { 1022 return readAligned(pArg); 1023 } 1024 1025 1026 intptr_t Parcel::readIntPtr() const 1027 { 1028 return readAligned<intptr_t>(); 1029 } 1030 1031 1032 const char* Parcel::readCString() const 1033 { 1034 const size_t avail = mDataSize-mDataPos; 1035 if (avail > 0) { 1036 const char* str = reinterpret_cast<const char*>(mData+mDataPos); 1037 // is the string's trailing NUL within the parcel's valid bounds? 1038 const char* eos = reinterpret_cast<const char*>(memchr(str, 0, avail)); 1039 if (eos) { 1040 const size_t len = eos - str; 1041 mDataPos += PAD_SIZE(len+1); 1042 ALOGV("readCString Setting data pos of %p to %d\n", this, mDataPos); 1043 return str; 1044 } 1045 } 1046 return NULL; 1047 } 1048 1049 String8 Parcel::readString8() const 1050 { 1051 int32_t size = readInt32(); 1052 // watch for potential int overflow adding 1 for trailing NUL 1053 if (size > 0 && size < INT32_MAX) { 1054 const char* str = (const char*)readInplace(size+1); 1055 if (str) return String8(str, size); 1056 } 1057 return String8(); 1058 } 1059 1060 String16 Parcel::readString16() const 1061 { 1062 size_t len; 1063 const char16_t* str = readString16Inplace(&len); 1064 if (str) return String16(str, len); 1065 ALOGE("Reading a NULL string not supported here."); 1066 return String16(); 1067 } 1068 1069 const char16_t* Parcel::readString16Inplace(size_t* outLen) const 1070 { 1071 int32_t size = readInt32(); 1072 // watch for potential int overflow from size+1 1073 if (size >= 0 && size < INT32_MAX) { 1074 *outLen = size; 1075 const char16_t* str = (const char16_t*)readInplace((size+1)*sizeof(char16_t)); 1076 if (str != NULL) { 1077 return str; 1078 } 1079 } 1080 *outLen = 0; 1081 return NULL; 1082 } 1083 1084 sp<IBinder> Parcel::readStrongBinder() const 1085 { 1086 sp<IBinder> val; 1087 unflatten_binder(ProcessState::self(), *this, &val); 1088 return val; 1089 } 1090 1091 wp<IBinder> Parcel::readWeakBinder() const 1092 { 1093 wp<IBinder> val; 1094 unflatten_binder(ProcessState::self(), *this, &val); 1095 return val; 1096 } 1097 1098 int32_t Parcel::readExceptionCode() const 1099 { 1100 int32_t exception_code = readAligned<int32_t>(); 1101 if (exception_code == EX_HAS_REPLY_HEADER) { 1102 int32_t header_start = dataPosition(); 1103 int32_t header_size = readAligned<int32_t>(); 1104 // Skip over fat responses headers. Not used (or propagated) in 1105 // native code 1106 setDataPosition(header_start + header_size); 1107 // And fat response headers are currently only used when there are no 1108 // exceptions, so return no error: 1109 return 0; 1110 } 1111 return exception_code; 1112 } 1113 1114 native_handle* Parcel::readNativeHandle() const 1115 { 1116 int numFds, numInts; 1117 status_t err; 1118 err = readInt32(&numFds); 1119 if (err != NO_ERROR) return 0; 1120 err = readInt32(&numInts); 1121 if (err != NO_ERROR) return 0; 1122 1123 native_handle* h = native_handle_create(numFds, numInts); 1124 for (int i=0 ; err==NO_ERROR && i<numFds ; i++) { 1125 h->data[i] = dup(readFileDescriptor()); 1126 if (h->data[i] < 0) err = BAD_VALUE; 1127 } 1128 err = read(h->data + numFds, sizeof(int)*numInts); 1129 if (err != NO_ERROR) { 1130 native_handle_close(h); 1131 native_handle_delete(h); 1132 h = 0; 1133 } 1134 return h; 1135 } 1136 1137 1138 int Parcel::readFileDescriptor() const 1139 { 1140 const flat_binder_object* flat = readObject(true); 1141 if (flat) { 1142 switch (flat->type) { 1143 case BINDER_TYPE_FD: 1144 //ALOGI("Returning file descriptor %ld from parcel %p\n", flat->handle, this); 1145 return flat->handle; 1146 } 1147 } 1148 return BAD_TYPE; 1149 } 1150 1151 status_t Parcel::readBlob(size_t len, ReadableBlob* outBlob) const 1152 { 1153 int32_t useAshmem; 1154 status_t status = readInt32(&useAshmem); 1155 if (status) return status; 1156 1157 if (!useAshmem) { 1158 ALOGV("readBlob: read in place"); 1159 const void* ptr = readInplace(len); 1160 if (!ptr) return BAD_VALUE; 1161 1162 outBlob->init(false /*mapped*/, const_cast<void*>(ptr), len); 1163 return NO_ERROR; 1164 } 1165 1166 ALOGV("readBlob: read from ashmem"); 1167 int fd = readFileDescriptor(); 1168 if (fd == int(BAD_TYPE)) return BAD_VALUE; 1169 1170 void* ptr = ::mmap(NULL, len, PROT_READ, MAP_SHARED, fd, 0); 1171 if (!ptr) return NO_MEMORY; 1172 1173 outBlob->init(true /*mapped*/, ptr, len); 1174 return NO_ERROR; 1175 } 1176 1177 status_t Parcel::read(FlattenableHelperInterface& val) const 1178 { 1179 // size 1180 const size_t len = this->readInt32(); 1181 const size_t fd_count = this->readInt32(); 1182 1183 // payload 1184 void const* const buf = this->readInplace(PAD_SIZE(len)); 1185 if (buf == NULL) 1186 return BAD_VALUE; 1187 1188 int* fds = NULL; 1189 if (fd_count) { 1190 fds = new int[fd_count]; 1191 } 1192 1193 status_t err = NO_ERROR; 1194 for (size_t i=0 ; i<fd_count && err==NO_ERROR ; i++) { 1195 fds[i] = dup(this->readFileDescriptor()); 1196 if (fds[i] < 0) err = BAD_VALUE; 1197 } 1198 1199 if (err == NO_ERROR) { 1200 err = val.unflatten(buf, len, fds, fd_count); 1201 } 1202 1203 if (fd_count) { 1204 delete [] fds; 1205 } 1206 1207 return err; 1208 } 1209 const flat_binder_object* Parcel::readObject(bool nullMetaData) const 1210 { 1211 const size_t DPOS = mDataPos; 1212 if ((DPOS+sizeof(flat_binder_object)) <= mDataSize) { 1213 const flat_binder_object* obj 1214 = reinterpret_cast<const flat_binder_object*>(mData+DPOS); 1215 mDataPos = DPOS + sizeof(flat_binder_object); 1216 if (!nullMetaData && (obj->cookie == NULL && obj->binder == NULL)) { 1217 // When transferring a NULL object, we don't write it into 1218 // the object list, so we don't want to check for it when 1219 // reading. 1220 ALOGV("readObject Setting data pos of %p to %d\n", this, mDataPos); 1221 return obj; 1222 } 1223 1224 // Ensure that this object is valid... 1225 size_t* const OBJS = mObjects; 1226 const size_t N = mObjectsSize; 1227 size_t opos = mNextObjectHint; 1228 1229 if (N > 0) { 1230 ALOGV("Parcel %p looking for obj at %d, hint=%d\n", 1231 this, DPOS, opos); 1232 1233 // Start at the current hint position, looking for an object at 1234 // the current data position. 1235 if (opos < N) { 1236 while (opos < (N-1) && OBJS[opos] < DPOS) { 1237 opos++; 1238 } 1239 } else { 1240 opos = N-1; 1241 } 1242 if (OBJS[opos] == DPOS) { 1243 // Found it! 1244 ALOGV("Parcel found obj %d at index %d with forward search", 1245 this, DPOS, opos); 1246 mNextObjectHint = opos+1; 1247 ALOGV("readObject Setting data pos of %p to %d\n", this, mDataPos); 1248 return obj; 1249 } 1250 1251 // Look backwards for it... 1252 while (opos > 0 && OBJS[opos] > DPOS) { 1253 opos--; 1254 } 1255 if (OBJS[opos] == DPOS) { 1256 // Found it! 1257 ALOGV("Parcel found obj %d at index %d with backward search", 1258 this, DPOS, opos); 1259 mNextObjectHint = opos+1; 1260 ALOGV("readObject Setting data pos of %p to %d\n", this, mDataPos); 1261 return obj; 1262 } 1263 } 1264 ALOGW("Attempt to read object from Parcel %p at offset %d that is not in the object list", 1265 this, DPOS); 1266 } 1267 return NULL; 1268 } 1269 1270 void Parcel::closeFileDescriptors() 1271 { 1272 size_t i = mObjectsSize; 1273 if (i > 0) { 1274 //ALOGI("Closing file descriptors for %d objects...", mObjectsSize); 1275 } 1276 while (i > 0) { 1277 i--; 1278 const flat_binder_object* flat 1279 = reinterpret_cast<flat_binder_object*>(mData+mObjects[i]); 1280 if (flat->type == BINDER_TYPE_FD) { 1281 //ALOGI("Closing fd: %ld\n", flat->handle); 1282 close(flat->handle); 1283 } 1284 } 1285 } 1286 1287 const uint8_t* Parcel::ipcData() const 1288 { 1289 return mData; 1290 } 1291 1292 size_t Parcel::ipcDataSize() const 1293 { 1294 return (mDataSize > mDataPos ? mDataSize : mDataPos); 1295 } 1296 1297 const size_t* Parcel::ipcObjects() const 1298 { 1299 return mObjects; 1300 } 1301 1302 size_t Parcel::ipcObjectsCount() const 1303 { 1304 return mObjectsSize; 1305 } 1306 1307 void Parcel::ipcSetDataReference(const uint8_t* data, size_t dataSize, 1308 const size_t* objects, size_t objectsCount, release_func relFunc, void* relCookie) 1309 { 1310 freeDataNoInit(); 1311 mError = NO_ERROR; 1312 mData = const_cast<uint8_t*>(data); 1313 mDataSize = mDataCapacity = dataSize; 1314 //ALOGI("setDataReference Setting data size of %p to %lu (pid=%d)\n", this, mDataSize, getpid()); 1315 mDataPos = 0; 1316 ALOGV("setDataReference Setting data pos of %p to %d\n", this, mDataPos); 1317 mObjects = const_cast<size_t*>(objects); 1318 mObjectsSize = mObjectsCapacity = objectsCount; 1319 mNextObjectHint = 0; 1320 mOwner = relFunc; 1321 mOwnerCookie = relCookie; 1322 scanForFds(); 1323 } 1324 1325 void Parcel::print(TextOutput& to, uint32_t flags) const 1326 { 1327 to << "Parcel("; 1328 1329 if (errorCheck() != NO_ERROR) { 1330 const status_t err = errorCheck(); 1331 to << "Error: " << (void*)err << " \"" << strerror(-err) << "\""; 1332 } else if (dataSize() > 0) { 1333 const uint8_t* DATA = data(); 1334 to << indent << HexDump(DATA, dataSize()) << dedent; 1335 const size_t* OBJS = objects(); 1336 const size_t N = objectsCount(); 1337 for (size_t i=0; i<N; i++) { 1338 const flat_binder_object* flat 1339 = reinterpret_cast<const flat_binder_object*>(DATA+OBJS[i]); 1340 to << endl << "Object #" << i << " @ " << (void*)OBJS[i] << ": " 1341 << TypeCode(flat->type & 0x7f7f7f00) 1342 << " = " << flat->binder; 1343 } 1344 } else { 1345 to << "NULL"; 1346 } 1347 1348 to << ")"; 1349 } 1350 1351 void Parcel::releaseObjects() 1352 { 1353 const sp<ProcessState> proc(ProcessState::self()); 1354 size_t i = mObjectsSize; 1355 uint8_t* const data = mData; 1356 size_t* const objects = mObjects; 1357 while (i > 0) { 1358 i--; 1359 const flat_binder_object* flat 1360 = reinterpret_cast<flat_binder_object*>(data+objects[i]); 1361 release_object(proc, *flat, this); 1362 } 1363 } 1364 1365 void Parcel::acquireObjects() 1366 { 1367 const sp<ProcessState> proc(ProcessState::self()); 1368 size_t i = mObjectsSize; 1369 uint8_t* const data = mData; 1370 size_t* const objects = mObjects; 1371 while (i > 0) { 1372 i--; 1373 const flat_binder_object* flat 1374 = reinterpret_cast<flat_binder_object*>(data+objects[i]); 1375 acquire_object(proc, *flat, this); 1376 } 1377 } 1378 1379 void Parcel::freeData() 1380 { 1381 freeDataNoInit(); 1382 initState(); 1383 } 1384 1385 void Parcel::freeDataNoInit() 1386 { 1387 if (mOwner) { 1388 //ALOGI("Freeing data ref of %p (pid=%d)\n", this, getpid()); 1389 mOwner(this, mData, mDataSize, mObjects, mObjectsSize, mOwnerCookie); 1390 } else { 1391 releaseObjects(); 1392 if (mData) free(mData); 1393 if (mObjects) free(mObjects); 1394 } 1395 } 1396 1397 status_t Parcel::growData(size_t len) 1398 { 1399 size_t newSize = ((mDataSize+len)*3)/2; 1400 return (newSize <= mDataSize) 1401 ? (status_t) NO_MEMORY 1402 : continueWrite(newSize); 1403 } 1404 1405 status_t Parcel::restartWrite(size_t desired) 1406 { 1407 if (mOwner) { 1408 freeData(); 1409 return continueWrite(desired); 1410 } 1411 1412 uint8_t* data = (uint8_t*)realloc(mData, desired); 1413 if (!data && desired > mDataCapacity) { 1414 mError = NO_MEMORY; 1415 return NO_MEMORY; 1416 } 1417 1418 releaseObjects(); 1419 1420 if (data) { 1421 mData = data; 1422 mDataCapacity = desired; 1423 } 1424 1425 mDataSize = mDataPos = 0; 1426 ALOGV("restartWrite Setting data size of %p to %d\n", this, mDataSize); 1427 ALOGV("restartWrite Setting data pos of %p to %d\n", this, mDataPos); 1428 1429 free(mObjects); 1430 mObjects = NULL; 1431 mObjectsSize = mObjectsCapacity = 0; 1432 mNextObjectHint = 0; 1433 mHasFds = false; 1434 mFdsKnown = true; 1435 mAllowFds = true; 1436 1437 return NO_ERROR; 1438 } 1439 1440 status_t Parcel::continueWrite(size_t desired) 1441 { 1442 // If shrinking, first adjust for any objects that appear 1443 // after the new data size. 1444 size_t objectsSize = mObjectsSize; 1445 if (desired < mDataSize) { 1446 if (desired == 0) { 1447 objectsSize = 0; 1448 } else { 1449 while (objectsSize > 0) { 1450 if (mObjects[objectsSize-1] < desired) 1451 break; 1452 objectsSize--; 1453 } 1454 } 1455 } 1456 1457 if (mOwner) { 1458 // If the size is going to zero, just release the owner's data. 1459 if (desired == 0) { 1460 freeData(); 1461 return NO_ERROR; 1462 } 1463 1464 // If there is a different owner, we need to take 1465 // posession. 1466 uint8_t* data = (uint8_t*)malloc(desired); 1467 if (!data) { 1468 mError = NO_MEMORY; 1469 return NO_MEMORY; 1470 } 1471 size_t* objects = NULL; 1472 1473 if (objectsSize) { 1474 objects = (size_t*)malloc(objectsSize*sizeof(size_t)); 1475 if (!objects) { 1476 free(data); 1477 1478 mError = NO_MEMORY; 1479 return NO_MEMORY; 1480 } 1481 1482 // Little hack to only acquire references on objects 1483 // we will be keeping. 1484 size_t oldObjectsSize = mObjectsSize; 1485 mObjectsSize = objectsSize; 1486 acquireObjects(); 1487 mObjectsSize = oldObjectsSize; 1488 } 1489 1490 if (mData) { 1491 memcpy(data, mData, mDataSize < desired ? mDataSize : desired); 1492 } 1493 if (objects && mObjects) { 1494 memcpy(objects, mObjects, objectsSize*sizeof(size_t)); 1495 } 1496 //ALOGI("Freeing data ref of %p (pid=%d)\n", this, getpid()); 1497 mOwner(this, mData, mDataSize, mObjects, mObjectsSize, mOwnerCookie); 1498 mOwner = NULL; 1499 1500 mData = data; 1501 mObjects = objects; 1502 mDataSize = (mDataSize < desired) ? mDataSize : desired; 1503 ALOGV("continueWrite Setting data size of %p to %d\n", this, mDataSize); 1504 mDataCapacity = desired; 1505 mObjectsSize = mObjectsCapacity = objectsSize; 1506 mNextObjectHint = 0; 1507 1508 } else if (mData) { 1509 if (objectsSize < mObjectsSize) { 1510 // Need to release refs on any objects we are dropping. 1511 const sp<ProcessState> proc(ProcessState::self()); 1512 for (size_t i=objectsSize; i<mObjectsSize; i++) { 1513 const flat_binder_object* flat 1514 = reinterpret_cast<flat_binder_object*>(mData+mObjects[i]); 1515 if (flat->type == BINDER_TYPE_FD) { 1516 // will need to rescan because we may have lopped off the only FDs 1517 mFdsKnown = false; 1518 } 1519 release_object(proc, *flat, this); 1520 } 1521 size_t* objects = 1522 (size_t*)realloc(mObjects, objectsSize*sizeof(size_t)); 1523 if (objects) { 1524 mObjects = objects; 1525 } 1526 mObjectsSize = objectsSize; 1527 mNextObjectHint = 0; 1528 } 1529 1530 // We own the data, so we can just do a realloc(). 1531 if (desired > mDataCapacity) { 1532 uint8_t* data = (uint8_t*)realloc(mData, desired); 1533 if (data) { 1534 mData = data; 1535 mDataCapacity = desired; 1536 } else if (desired > mDataCapacity) { 1537 mError = NO_MEMORY; 1538 return NO_MEMORY; 1539 } 1540 } else { 1541 if (mDataSize > desired) { 1542 mDataSize = desired; 1543 ALOGV("continueWrite Setting data size of %p to %d\n", this, mDataSize); 1544 } 1545 if (mDataPos > desired) { 1546 mDataPos = desired; 1547 ALOGV("continueWrite Setting data pos of %p to %d\n", this, mDataPos); 1548 } 1549 } 1550 1551 } else { 1552 // This is the first data. Easy! 1553 uint8_t* data = (uint8_t*)malloc(desired); 1554 if (!data) { 1555 mError = NO_MEMORY; 1556 return NO_MEMORY; 1557 } 1558 1559 if(!(mDataCapacity == 0 && mObjects == NULL 1560 && mObjectsCapacity == 0)) { 1561 ALOGE("continueWrite: %d/%p/%d/%d", mDataCapacity, mObjects, mObjectsCapacity, desired); 1562 } 1563 1564 mData = data; 1565 mDataSize = mDataPos = 0; 1566 ALOGV("continueWrite Setting data size of %p to %d\n", this, mDataSize); 1567 ALOGV("continueWrite Setting data pos of %p to %d\n", this, mDataPos); 1568 mDataCapacity = desired; 1569 } 1570 1571 return NO_ERROR; 1572 } 1573 1574 void Parcel::initState() 1575 { 1576 mError = NO_ERROR; 1577 mData = 0; 1578 mDataSize = 0; 1579 mDataCapacity = 0; 1580 mDataPos = 0; 1581 ALOGV("initState Setting data size of %p to %d\n", this, mDataSize); 1582 ALOGV("initState Setting data pos of %p to %d\n", this, mDataPos); 1583 mObjects = NULL; 1584 mObjectsSize = 0; 1585 mObjectsCapacity = 0; 1586 mNextObjectHint = 0; 1587 mHasFds = false; 1588 mFdsKnown = true; 1589 mAllowFds = true; 1590 mOwner = NULL; 1591 } 1592 1593 void Parcel::scanForFds() const 1594 { 1595 bool hasFds = false; 1596 for (size_t i=0; i<mObjectsSize; i++) { 1597 const flat_binder_object* flat 1598 = reinterpret_cast<const flat_binder_object*>(mData + mObjects[i]); 1599 if (flat->type == BINDER_TYPE_FD) { 1600 hasFds = true; 1601 break; 1602 } 1603 } 1604 mHasFds = hasFds; 1605 mFdsKnown = true; 1606 } 1607 1608 // --- Parcel::Blob --- 1609 1610 Parcel::Blob::Blob() : 1611 mMapped(false), mData(NULL), mSize(0) { 1612 } 1613 1614 Parcel::Blob::~Blob() { 1615 release(); 1616 } 1617 1618 void Parcel::Blob::release() { 1619 if (mMapped && mData) { 1620 ::munmap(mData, mSize); 1621 } 1622 clear(); 1623 } 1624 1625 void Parcel::Blob::init(bool mapped, void* data, size_t size) { 1626 mMapped = mapped; 1627 mData = data; 1628 mSize = size; 1629 } 1630 1631 void Parcel::Blob::clear() { 1632 mMapped = false; 1633 mData = NULL; 1634 mSize = 0; 1635 } 1636 1637 }; // namespace android 1638
