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 status_t Parcel::writeInt32Array(size_t len, const int32_t *val) { 621 if (!val) { 622 return writeAligned(-1); 623 } 624 status_t ret = writeAligned(len); 625 if (ret == NO_ERROR) { 626 ret = write(val, len * sizeof(*val)); 627 } 628 return ret; 629 } 630 631 status_t Parcel::writeInt64(int64_t val) 632 { 633 return writeAligned(val); 634 } 635 636 status_t Parcel::writeFloat(float val) 637 { 638 return writeAligned(val); 639 } 640 641 #if defined(__mips__) && defined(__mips_hard_float) 642 643 status_t Parcel::writeDouble(double val) 644 { 645 union { 646 double d; 647 unsigned long long ll; 648 } u; 649 u.d = val; 650 return writeAligned(u.ll); 651 } 652 653 #else 654 655 status_t Parcel::writeDouble(double val) 656 { 657 return writeAligned(val); 658 } 659 660 #endif 661 662 status_t Parcel::writeIntPtr(intptr_t val) 663 { 664 return writeAligned(val); 665 } 666 667 status_t Parcel::writeCString(const char* str) 668 { 669 return write(str, strlen(str)+1); 670 } 671 672 status_t Parcel::writeString8(const String8& str) 673 { 674 status_t err = writeInt32(str.bytes()); 675 // only write string if its length is more than zero characters, 676 // as readString8 will only read if the length field is non-zero. 677 // this is slightly different from how writeString16 works. 678 if (str.bytes() > 0 && err == NO_ERROR) { 679 err = write(str.string(), str.bytes()+1); 680 } 681 return err; 682 } 683 684 status_t Parcel::writeString16(const String16& str) 685 { 686 return writeString16(str.string(), str.size()); 687 } 688 689 status_t Parcel::writeString16(const char16_t* str, size_t len) 690 { 691 if (str == NULL) return writeInt32(-1); 692 693 status_t err = writeInt32(len); 694 if (err == NO_ERROR) { 695 len *= sizeof(char16_t); 696 uint8_t* data = (uint8_t*)writeInplace(len+sizeof(char16_t)); 697 if (data) { 698 memcpy(data, str, len); 699 *reinterpret_cast<char16_t*>(data+len) = 0; 700 return NO_ERROR; 701 } 702 err = mError; 703 } 704 return err; 705 } 706 707 status_t Parcel::writeStrongBinder(const sp<IBinder>& val) 708 { 709 return flatten_binder(ProcessState::self(), val, this); 710 } 711 712 status_t Parcel::writeWeakBinder(const wp<IBinder>& val) 713 { 714 return flatten_binder(ProcessState::self(), val, this); 715 } 716 717 status_t Parcel::writeNativeHandle(const native_handle* handle) 718 { 719 if (!handle || handle->version != sizeof(native_handle)) 720 return BAD_TYPE; 721 722 status_t err; 723 err = writeInt32(handle->numFds); 724 if (err != NO_ERROR) return err; 725 726 err = writeInt32(handle->numInts); 727 if (err != NO_ERROR) return err; 728 729 for (int i=0 ; err==NO_ERROR && i<handle->numFds ; i++) 730 err = writeDupFileDescriptor(handle->data[i]); 731 732 if (err != NO_ERROR) { 733 ALOGD("write native handle, write dup fd failed"); 734 return err; 735 } 736 err = write(handle->data + handle->numFds, sizeof(int)*handle->numInts); 737 return err; 738 } 739 740 status_t Parcel::writeFileDescriptor(int fd, bool takeOwnership) 741 { 742 flat_binder_object obj; 743 obj.type = BINDER_TYPE_FD; 744 obj.flags = 0x7f | FLAT_BINDER_FLAG_ACCEPTS_FDS; 745 obj.handle = fd; 746 obj.cookie = (void*) (takeOwnership ? 1 : 0); 747 return writeObject(obj, true); 748 } 749 750 status_t Parcel::writeDupFileDescriptor(int fd) 751 { 752 int dupFd = dup(fd); 753 if (dupFd < 0) { 754 return -errno; 755 } 756 status_t err = writeFileDescriptor(dupFd, true /*takeOwnership*/); 757 if (err) { 758 close(dupFd); 759 } 760 return err; 761 } 762 763 status_t Parcel::writeBlob(size_t len, WritableBlob* outBlob) 764 { 765 status_t status; 766 767 if (!mAllowFds || len <= IN_PLACE_BLOB_LIMIT) { 768 ALOGV("writeBlob: write in place"); 769 status = writeInt32(0); 770 if (status) return status; 771 772 void* ptr = writeInplace(len); 773 if (!ptr) return NO_MEMORY; 774 775 outBlob->init(false /*mapped*/, ptr, len); 776 return NO_ERROR; 777 } 778 779 ALOGV("writeBlob: write to ashmem"); 780 int fd = ashmem_create_region("Parcel Blob", len); 781 if (fd < 0) return NO_MEMORY; 782 783 int result = ashmem_set_prot_region(fd, PROT_READ | PROT_WRITE); 784 if (result < 0) { 785 status = result; 786 } else { 787 void* ptr = ::mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); 788 if (ptr == MAP_FAILED) { 789 status = -errno; 790 } else { 791 result = ashmem_set_prot_region(fd, PROT_READ); 792 if (result < 0) { 793 status = result; 794 } else { 795 status = writeInt32(1); 796 if (!status) { 797 status = writeFileDescriptor(fd, true /*takeOwnership*/); 798 if (!status) { 799 outBlob->init(true /*mapped*/, ptr, len); 800 return NO_ERROR; 801 } 802 } 803 } 804 } 805 ::munmap(ptr, len); 806 } 807 ::close(fd); 808 return status; 809 } 810 811 status_t Parcel::write(const FlattenableHelperInterface& val) 812 { 813 status_t err; 814 815 // size if needed 816 const size_t len = val.getFlattenedSize(); 817 const size_t fd_count = val.getFdCount(); 818 819 err = this->writeInt32(len); 820 if (err) return err; 821 822 err = this->writeInt32(fd_count); 823 if (err) return err; 824 825 // payload 826 void* const buf = this->writeInplace(PAD_SIZE(len)); 827 if (buf == NULL) 828 return BAD_VALUE; 829 830 int* fds = NULL; 831 if (fd_count) { 832 fds = new int[fd_count]; 833 } 834 835 err = val.flatten(buf, len, fds, fd_count); 836 for (size_t i=0 ; i<fd_count && err==NO_ERROR ; i++) { 837 err = this->writeDupFileDescriptor( fds[i] ); 838 } 839 840 if (fd_count) { 841 delete [] fds; 842 } 843 844 return err; 845 } 846 847 status_t Parcel::writeObject(const flat_binder_object& val, bool nullMetaData) 848 { 849 const bool enoughData = (mDataPos+sizeof(val)) <= mDataCapacity; 850 const bool enoughObjects = mObjectsSize < mObjectsCapacity; 851 if (enoughData && enoughObjects) { 852 restart_write: 853 *reinterpret_cast<flat_binder_object*>(mData+mDataPos) = val; 854 855 // Need to write meta-data? 856 if (nullMetaData || val.binder != NULL) { 857 mObjects[mObjectsSize] = mDataPos; 858 acquire_object(ProcessState::self(), val, this); 859 mObjectsSize++; 860 } 861 862 // remember if it's a file descriptor 863 if (val.type == BINDER_TYPE_FD) { 864 if (!mAllowFds) { 865 return FDS_NOT_ALLOWED; 866 } 867 mHasFds = mFdsKnown = true; 868 } 869 870 return finishWrite(sizeof(flat_binder_object)); 871 } 872 873 if (!enoughData) { 874 const status_t err = growData(sizeof(val)); 875 if (err != NO_ERROR) return err; 876 } 877 if (!enoughObjects) { 878 size_t newSize = ((mObjectsSize+2)*3)/2; 879 size_t* objects = (size_t*)realloc(mObjects, newSize*sizeof(size_t)); 880 if (objects == NULL) return NO_MEMORY; 881 mObjects = objects; 882 mObjectsCapacity = newSize; 883 } 884 885 goto restart_write; 886 } 887 888 status_t Parcel::writeNoException() 889 { 890 return writeInt32(0); 891 } 892 893 void Parcel::remove(size_t start, size_t amt) 894 { 895 LOG_ALWAYS_FATAL("Parcel::remove() not yet implemented!"); 896 } 897 898 status_t Parcel::read(void* outData, size_t len) const 899 { 900 if ((mDataPos+PAD_SIZE(len)) >= mDataPos && (mDataPos+PAD_SIZE(len)) <= mDataSize) { 901 memcpy(outData, mData+mDataPos, len); 902 mDataPos += PAD_SIZE(len); 903 ALOGV("read Setting data pos of %p to %d\n", this, mDataPos); 904 return NO_ERROR; 905 } 906 return NOT_ENOUGH_DATA; 907 } 908 909 const void* Parcel::readInplace(size_t len) const 910 { 911 if ((mDataPos+PAD_SIZE(len)) >= mDataPos && (mDataPos+PAD_SIZE(len)) <= mDataSize) { 912 const void* data = mData+mDataPos; 913 mDataPos += PAD_SIZE(len); 914 ALOGV("readInplace Setting data pos of %p to %d\n", this, mDataPos); 915 return data; 916 } 917 return NULL; 918 } 919 920 template<class T> 921 status_t Parcel::readAligned(T *pArg) const { 922 COMPILE_TIME_ASSERT_FUNCTION_SCOPE(PAD_SIZE(sizeof(T)) == sizeof(T)); 923 924 if ((mDataPos+sizeof(T)) <= mDataSize) { 925 const void* data = mData+mDataPos; 926 mDataPos += sizeof(T); 927 *pArg = *reinterpret_cast<const T*>(data); 928 return NO_ERROR; 929 } else { 930 return NOT_ENOUGH_DATA; 931 } 932 } 933 934 template<class T> 935 T Parcel::readAligned() const { 936 T result; 937 if (readAligned(&result) != NO_ERROR) { 938 result = 0; 939 } 940 941 return result; 942 } 943 944 template<class T> 945 status_t Parcel::writeAligned(T val) { 946 COMPILE_TIME_ASSERT_FUNCTION_SCOPE(PAD_SIZE(sizeof(T)) == sizeof(T)); 947 948 if ((mDataPos+sizeof(val)) <= mDataCapacity) { 949 restart_write: 950 *reinterpret_cast<T*>(mData+mDataPos) = val; 951 return finishWrite(sizeof(val)); 952 } 953 954 status_t err = growData(sizeof(val)); 955 if (err == NO_ERROR) goto restart_write; 956 return err; 957 } 958 959 status_t Parcel::readInt32(int32_t *pArg) const 960 { 961 return readAligned(pArg); 962 } 963 964 int32_t Parcel::readInt32() const 965 { 966 return readAligned<int32_t>(); 967 } 968 969 970 status_t Parcel::readInt64(int64_t *pArg) const 971 { 972 return readAligned(pArg); 973 } 974 975 976 int64_t Parcel::readInt64() const 977 { 978 return readAligned<int64_t>(); 979 } 980 981 status_t Parcel::readFloat(float *pArg) const 982 { 983 return readAligned(pArg); 984 } 985 986 987 float Parcel::readFloat() const 988 { 989 return readAligned<float>(); 990 } 991 992 #if defined(__mips__) && defined(__mips_hard_float) 993 994 status_t Parcel::readDouble(double *pArg) const 995 { 996 union { 997 double d; 998 unsigned long long ll; 999 } u; 1000 status_t status; 1001 status = readAligned(&u.ll); 1002 *pArg = u.d; 1003 return status; 1004 } 1005 1006 double Parcel::readDouble() const 1007 { 1008 union { 1009 double d; 1010 unsigned long long ll; 1011 } u; 1012 u.ll = readAligned<unsigned long long>(); 1013 return u.d; 1014 } 1015 1016 #else 1017 1018 status_t Parcel::readDouble(double *pArg) const 1019 { 1020 return readAligned(pArg); 1021 } 1022 1023 double Parcel::readDouble() const 1024 { 1025 return readAligned<double>(); 1026 } 1027 1028 #endif 1029 1030 status_t Parcel::readIntPtr(intptr_t *pArg) const 1031 { 1032 return readAligned(pArg); 1033 } 1034 1035 1036 intptr_t Parcel::readIntPtr() const 1037 { 1038 return readAligned<intptr_t>(); 1039 } 1040 1041 1042 const char* Parcel::readCString() const 1043 { 1044 const size_t avail = mDataSize-mDataPos; 1045 if (avail > 0) { 1046 const char* str = reinterpret_cast<const char*>(mData+mDataPos); 1047 // is the string's trailing NUL within the parcel's valid bounds? 1048 const char* eos = reinterpret_cast<const char*>(memchr(str, 0, avail)); 1049 if (eos) { 1050 const size_t len = eos - str; 1051 mDataPos += PAD_SIZE(len+1); 1052 ALOGV("readCString Setting data pos of %p to %d\n", this, mDataPos); 1053 return str; 1054 } 1055 } 1056 return NULL; 1057 } 1058 1059 String8 Parcel::readString8() const 1060 { 1061 int32_t size = readInt32(); 1062 // watch for potential int overflow adding 1 for trailing NUL 1063 if (size > 0 && size < INT32_MAX) { 1064 const char* str = (const char*)readInplace(size+1); 1065 if (str) return String8(str, size); 1066 } 1067 return String8(); 1068 } 1069 1070 String16 Parcel::readString16() const 1071 { 1072 size_t len; 1073 const char16_t* str = readString16Inplace(&len); 1074 if (str) return String16(str, len); 1075 ALOGE("Reading a NULL string not supported here."); 1076 return String16(); 1077 } 1078 1079 const char16_t* Parcel::readString16Inplace(size_t* outLen) const 1080 { 1081 int32_t size = readInt32(); 1082 // watch for potential int overflow from size+1 1083 if (size >= 0 && size < INT32_MAX) { 1084 *outLen = size; 1085 const char16_t* str = (const char16_t*)readInplace((size+1)*sizeof(char16_t)); 1086 if (str != NULL) { 1087 return str; 1088 } 1089 } 1090 *outLen = 0; 1091 return NULL; 1092 } 1093 1094 sp<IBinder> Parcel::readStrongBinder() const 1095 { 1096 sp<IBinder> val; 1097 unflatten_binder(ProcessState::self(), *this, &val); 1098 return val; 1099 } 1100 1101 wp<IBinder> Parcel::readWeakBinder() const 1102 { 1103 wp<IBinder> val; 1104 unflatten_binder(ProcessState::self(), *this, &val); 1105 return val; 1106 } 1107 1108 int32_t Parcel::readExceptionCode() const 1109 { 1110 int32_t exception_code = readAligned<int32_t>(); 1111 if (exception_code == EX_HAS_REPLY_HEADER) { 1112 int32_t header_start = dataPosition(); 1113 int32_t header_size = readAligned<int32_t>(); 1114 // Skip over fat responses headers. Not used (or propagated) in 1115 // native code 1116 setDataPosition(header_start + header_size); 1117 // And fat response headers are currently only used when there are no 1118 // exceptions, so return no error: 1119 return 0; 1120 } 1121 return exception_code; 1122 } 1123 1124 native_handle* Parcel::readNativeHandle() const 1125 { 1126 int numFds, numInts; 1127 status_t err; 1128 err = readInt32(&numFds); 1129 if (err != NO_ERROR) return 0; 1130 err = readInt32(&numInts); 1131 if (err != NO_ERROR) return 0; 1132 1133 native_handle* h = native_handle_create(numFds, numInts); 1134 for (int i=0 ; err==NO_ERROR && i<numFds ; i++) { 1135 h->data[i] = dup(readFileDescriptor()); 1136 if (h->data[i] < 0) err = BAD_VALUE; 1137 } 1138 err = read(h->data + numFds, sizeof(int)*numInts); 1139 if (err != NO_ERROR) { 1140 native_handle_close(h); 1141 native_handle_delete(h); 1142 h = 0; 1143 } 1144 return h; 1145 } 1146 1147 1148 int Parcel::readFileDescriptor() const 1149 { 1150 const flat_binder_object* flat = readObject(true); 1151 if (flat) { 1152 switch (flat->type) { 1153 case BINDER_TYPE_FD: 1154 //ALOGI("Returning file descriptor %ld from parcel %p\n", flat->handle, this); 1155 return flat->handle; 1156 } 1157 } 1158 return BAD_TYPE; 1159 } 1160 1161 status_t Parcel::readBlob(size_t len, ReadableBlob* outBlob) const 1162 { 1163 int32_t useAshmem; 1164 status_t status = readInt32(&useAshmem); 1165 if (status) return status; 1166 1167 if (!useAshmem) { 1168 ALOGV("readBlob: read in place"); 1169 const void* ptr = readInplace(len); 1170 if (!ptr) return BAD_VALUE; 1171 1172 outBlob->init(false /*mapped*/, const_cast<void*>(ptr), len); 1173 return NO_ERROR; 1174 } 1175 1176 ALOGV("readBlob: read from ashmem"); 1177 int fd = readFileDescriptor(); 1178 if (fd == int(BAD_TYPE)) return BAD_VALUE; 1179 1180 void* ptr = ::mmap(NULL, len, PROT_READ, MAP_SHARED, fd, 0); 1181 if (!ptr) return NO_MEMORY; 1182 1183 outBlob->init(true /*mapped*/, ptr, len); 1184 return NO_ERROR; 1185 } 1186 1187 status_t Parcel::read(FlattenableHelperInterface& val) const 1188 { 1189 // size 1190 const size_t len = this->readInt32(); 1191 const size_t fd_count = this->readInt32(); 1192 1193 // payload 1194 void const* const buf = this->readInplace(PAD_SIZE(len)); 1195 if (buf == NULL) 1196 return BAD_VALUE; 1197 1198 int* fds = NULL; 1199 if (fd_count) { 1200 fds = new int[fd_count]; 1201 } 1202 1203 status_t err = NO_ERROR; 1204 for (size_t i=0 ; i<fd_count && err==NO_ERROR ; i++) { 1205 fds[i] = dup(this->readFileDescriptor()); 1206 if (fds[i] < 0) err = BAD_VALUE; 1207 } 1208 1209 if (err == NO_ERROR) { 1210 err = val.unflatten(buf, len, fds, fd_count); 1211 } 1212 1213 if (fd_count) { 1214 delete [] fds; 1215 } 1216 1217 return err; 1218 } 1219 const flat_binder_object* Parcel::readObject(bool nullMetaData) const 1220 { 1221 const size_t DPOS = mDataPos; 1222 if ((DPOS+sizeof(flat_binder_object)) <= mDataSize) { 1223 const flat_binder_object* obj 1224 = reinterpret_cast<const flat_binder_object*>(mData+DPOS); 1225 mDataPos = DPOS + sizeof(flat_binder_object); 1226 if (!nullMetaData && (obj->cookie == NULL && obj->binder == NULL)) { 1227 // When transferring a NULL object, we don't write it into 1228 // the object list, so we don't want to check for it when 1229 // reading. 1230 ALOGV("readObject Setting data pos of %p to %d\n", this, mDataPos); 1231 return obj; 1232 } 1233 1234 // Ensure that this object is valid... 1235 size_t* const OBJS = mObjects; 1236 const size_t N = mObjectsSize; 1237 size_t opos = mNextObjectHint; 1238 1239 if (N > 0) { 1240 ALOGV("Parcel %p looking for obj at %d, hint=%d\n", 1241 this, DPOS, opos); 1242 1243 // Start at the current hint position, looking for an object at 1244 // the current data position. 1245 if (opos < N) { 1246 while (opos < (N-1) && OBJS[opos] < DPOS) { 1247 opos++; 1248 } 1249 } else { 1250 opos = N-1; 1251 } 1252 if (OBJS[opos] == DPOS) { 1253 // Found it! 1254 ALOGV("Parcel found obj %d at index %d with forward search", 1255 this, DPOS, opos); 1256 mNextObjectHint = opos+1; 1257 ALOGV("readObject Setting data pos of %p to %d\n", this, mDataPos); 1258 return obj; 1259 } 1260 1261 // Look backwards for it... 1262 while (opos > 0 && OBJS[opos] > DPOS) { 1263 opos--; 1264 } 1265 if (OBJS[opos] == DPOS) { 1266 // Found it! 1267 ALOGV("Parcel found obj %d at index %d with backward search", 1268 this, DPOS, opos); 1269 mNextObjectHint = opos+1; 1270 ALOGV("readObject Setting data pos of %p to %d\n", this, mDataPos); 1271 return obj; 1272 } 1273 } 1274 ALOGW("Attempt to read object from Parcel %p at offset %d that is not in the object list", 1275 this, DPOS); 1276 } 1277 return NULL; 1278 } 1279 1280 void Parcel::closeFileDescriptors() 1281 { 1282 size_t i = mObjectsSize; 1283 if (i > 0) { 1284 //ALOGI("Closing file descriptors for %d objects...", mObjectsSize); 1285 } 1286 while (i > 0) { 1287 i--; 1288 const flat_binder_object* flat 1289 = reinterpret_cast<flat_binder_object*>(mData+mObjects[i]); 1290 if (flat->type == BINDER_TYPE_FD) { 1291 //ALOGI("Closing fd: %ld\n", flat->handle); 1292 close(flat->handle); 1293 } 1294 } 1295 } 1296 1297 const uint8_t* Parcel::ipcData() const 1298 { 1299 return mData; 1300 } 1301 1302 size_t Parcel::ipcDataSize() const 1303 { 1304 return (mDataSize > mDataPos ? mDataSize : mDataPos); 1305 } 1306 1307 const size_t* Parcel::ipcObjects() const 1308 { 1309 return mObjects; 1310 } 1311 1312 size_t Parcel::ipcObjectsCount() const 1313 { 1314 return mObjectsSize; 1315 } 1316 1317 void Parcel::ipcSetDataReference(const uint8_t* data, size_t dataSize, 1318 const size_t* objects, size_t objectsCount, release_func relFunc, void* relCookie) 1319 { 1320 freeDataNoInit(); 1321 mError = NO_ERROR; 1322 mData = const_cast<uint8_t*>(data); 1323 mDataSize = mDataCapacity = dataSize; 1324 //ALOGI("setDataReference Setting data size of %p to %lu (pid=%d)\n", this, mDataSize, getpid()); 1325 mDataPos = 0; 1326 ALOGV("setDataReference Setting data pos of %p to %d\n", this, mDataPos); 1327 mObjects = const_cast<size_t*>(objects); 1328 mObjectsSize = mObjectsCapacity = objectsCount; 1329 mNextObjectHint = 0; 1330 mOwner = relFunc; 1331 mOwnerCookie = relCookie; 1332 scanForFds(); 1333 } 1334 1335 void Parcel::print(TextOutput& to, uint32_t flags) const 1336 { 1337 to << "Parcel("; 1338 1339 if (errorCheck() != NO_ERROR) { 1340 const status_t err = errorCheck(); 1341 to << "Error: " << (void*)err << " \"" << strerror(-err) << "\""; 1342 } else if (dataSize() > 0) { 1343 const uint8_t* DATA = data(); 1344 to << indent << HexDump(DATA, dataSize()) << dedent; 1345 const size_t* OBJS = objects(); 1346 const size_t N = objectsCount(); 1347 for (size_t i=0; i<N; i++) { 1348 const flat_binder_object* flat 1349 = reinterpret_cast<const flat_binder_object*>(DATA+OBJS[i]); 1350 to << endl << "Object #" << i << " @ " << (void*)OBJS[i] << ": " 1351 << TypeCode(flat->type & 0x7f7f7f00) 1352 << " = " << flat->binder; 1353 } 1354 } else { 1355 to << "NULL"; 1356 } 1357 1358 to << ")"; 1359 } 1360 1361 void Parcel::releaseObjects() 1362 { 1363 const sp<ProcessState> proc(ProcessState::self()); 1364 size_t i = mObjectsSize; 1365 uint8_t* const data = mData; 1366 size_t* const objects = mObjects; 1367 while (i > 0) { 1368 i--; 1369 const flat_binder_object* flat 1370 = reinterpret_cast<flat_binder_object*>(data+objects[i]); 1371 release_object(proc, *flat, this); 1372 } 1373 } 1374 1375 void Parcel::acquireObjects() 1376 { 1377 const sp<ProcessState> proc(ProcessState::self()); 1378 size_t i = mObjectsSize; 1379 uint8_t* const data = mData; 1380 size_t* const objects = mObjects; 1381 while (i > 0) { 1382 i--; 1383 const flat_binder_object* flat 1384 = reinterpret_cast<flat_binder_object*>(data+objects[i]); 1385 acquire_object(proc, *flat, this); 1386 } 1387 } 1388 1389 void Parcel::freeData() 1390 { 1391 freeDataNoInit(); 1392 initState(); 1393 } 1394 1395 void Parcel::freeDataNoInit() 1396 { 1397 if (mOwner) { 1398 //ALOGI("Freeing data ref of %p (pid=%d)\n", this, getpid()); 1399 mOwner(this, mData, mDataSize, mObjects, mObjectsSize, mOwnerCookie); 1400 } else { 1401 releaseObjects(); 1402 if (mData) free(mData); 1403 if (mObjects) free(mObjects); 1404 } 1405 } 1406 1407 status_t Parcel::growData(size_t len) 1408 { 1409 size_t newSize = ((mDataSize+len)*3)/2; 1410 return (newSize <= mDataSize) 1411 ? (status_t) NO_MEMORY 1412 : continueWrite(newSize); 1413 } 1414 1415 status_t Parcel::restartWrite(size_t desired) 1416 { 1417 if (mOwner) { 1418 freeData(); 1419 return continueWrite(desired); 1420 } 1421 1422 uint8_t* data = (uint8_t*)realloc(mData, desired); 1423 if (!data && desired > mDataCapacity) { 1424 mError = NO_MEMORY; 1425 return NO_MEMORY; 1426 } 1427 1428 releaseObjects(); 1429 1430 if (data) { 1431 mData = data; 1432 mDataCapacity = desired; 1433 } 1434 1435 mDataSize = mDataPos = 0; 1436 ALOGV("restartWrite Setting data size of %p to %d\n", this, mDataSize); 1437 ALOGV("restartWrite Setting data pos of %p to %d\n", this, mDataPos); 1438 1439 free(mObjects); 1440 mObjects = NULL; 1441 mObjectsSize = mObjectsCapacity = 0; 1442 mNextObjectHint = 0; 1443 mHasFds = false; 1444 mFdsKnown = true; 1445 mAllowFds = true; 1446 1447 return NO_ERROR; 1448 } 1449 1450 status_t Parcel::continueWrite(size_t desired) 1451 { 1452 // If shrinking, first adjust for any objects that appear 1453 // after the new data size. 1454 size_t objectsSize = mObjectsSize; 1455 if (desired < mDataSize) { 1456 if (desired == 0) { 1457 objectsSize = 0; 1458 } else { 1459 while (objectsSize > 0) { 1460 if (mObjects[objectsSize-1] < desired) 1461 break; 1462 objectsSize--; 1463 } 1464 } 1465 } 1466 1467 if (mOwner) { 1468 // If the size is going to zero, just release the owner's data. 1469 if (desired == 0) { 1470 freeData(); 1471 return NO_ERROR; 1472 } 1473 1474 // If there is a different owner, we need to take 1475 // posession. 1476 uint8_t* data = (uint8_t*)malloc(desired); 1477 if (!data) { 1478 mError = NO_MEMORY; 1479 return NO_MEMORY; 1480 } 1481 size_t* objects = NULL; 1482 1483 if (objectsSize) { 1484 objects = (size_t*)malloc(objectsSize*sizeof(size_t)); 1485 if (!objects) { 1486 free(data); 1487 1488 mError = NO_MEMORY; 1489 return NO_MEMORY; 1490 } 1491 1492 // Little hack to only acquire references on objects 1493 // we will be keeping. 1494 size_t oldObjectsSize = mObjectsSize; 1495 mObjectsSize = objectsSize; 1496 acquireObjects(); 1497 mObjectsSize = oldObjectsSize; 1498 } 1499 1500 if (mData) { 1501 memcpy(data, mData, mDataSize < desired ? mDataSize : desired); 1502 } 1503 if (objects && mObjects) { 1504 memcpy(objects, mObjects, objectsSize*sizeof(size_t)); 1505 } 1506 //ALOGI("Freeing data ref of %p (pid=%d)\n", this, getpid()); 1507 mOwner(this, mData, mDataSize, mObjects, mObjectsSize, mOwnerCookie); 1508 mOwner = NULL; 1509 1510 mData = data; 1511 mObjects = objects; 1512 mDataSize = (mDataSize < desired) ? mDataSize : desired; 1513 ALOGV("continueWrite Setting data size of %p to %d\n", this, mDataSize); 1514 mDataCapacity = desired; 1515 mObjectsSize = mObjectsCapacity = objectsSize; 1516 mNextObjectHint = 0; 1517 1518 } else if (mData) { 1519 if (objectsSize < mObjectsSize) { 1520 // Need to release refs on any objects we are dropping. 1521 const sp<ProcessState> proc(ProcessState::self()); 1522 for (size_t i=objectsSize; i<mObjectsSize; i++) { 1523 const flat_binder_object* flat 1524 = reinterpret_cast<flat_binder_object*>(mData+mObjects[i]); 1525 if (flat->type == BINDER_TYPE_FD) { 1526 // will need to rescan because we may have lopped off the only FDs 1527 mFdsKnown = false; 1528 } 1529 release_object(proc, *flat, this); 1530 } 1531 size_t* objects = 1532 (size_t*)realloc(mObjects, objectsSize*sizeof(size_t)); 1533 if (objects) { 1534 mObjects = objects; 1535 } 1536 mObjectsSize = objectsSize; 1537 mNextObjectHint = 0; 1538 } 1539 1540 // We own the data, so we can just do a realloc(). 1541 if (desired > mDataCapacity) { 1542 uint8_t* data = (uint8_t*)realloc(mData, desired); 1543 if (data) { 1544 mData = data; 1545 mDataCapacity = desired; 1546 } else if (desired > mDataCapacity) { 1547 mError = NO_MEMORY; 1548 return NO_MEMORY; 1549 } 1550 } else { 1551 if (mDataSize > desired) { 1552 mDataSize = desired; 1553 ALOGV("continueWrite Setting data size of %p to %d\n", this, mDataSize); 1554 } 1555 if (mDataPos > desired) { 1556 mDataPos = desired; 1557 ALOGV("continueWrite Setting data pos of %p to %d\n", this, mDataPos); 1558 } 1559 } 1560 1561 } else { 1562 // This is the first data. Easy! 1563 uint8_t* data = (uint8_t*)malloc(desired); 1564 if (!data) { 1565 mError = NO_MEMORY; 1566 return NO_MEMORY; 1567 } 1568 1569 if(!(mDataCapacity == 0 && mObjects == NULL 1570 && mObjectsCapacity == 0)) { 1571 ALOGE("continueWrite: %d/%p/%d/%d", mDataCapacity, mObjects, mObjectsCapacity, desired); 1572 } 1573 1574 mData = data; 1575 mDataSize = mDataPos = 0; 1576 ALOGV("continueWrite Setting data size of %p to %d\n", this, mDataSize); 1577 ALOGV("continueWrite Setting data pos of %p to %d\n", this, mDataPos); 1578 mDataCapacity = desired; 1579 } 1580 1581 return NO_ERROR; 1582 } 1583 1584 void Parcel::initState() 1585 { 1586 mError = NO_ERROR; 1587 mData = 0; 1588 mDataSize = 0; 1589 mDataCapacity = 0; 1590 mDataPos = 0; 1591 ALOGV("initState Setting data size of %p to %d\n", this, mDataSize); 1592 ALOGV("initState Setting data pos of %p to %d\n", this, mDataPos); 1593 mObjects = NULL; 1594 mObjectsSize = 0; 1595 mObjectsCapacity = 0; 1596 mNextObjectHint = 0; 1597 mHasFds = false; 1598 mFdsKnown = true; 1599 mAllowFds = true; 1600 mOwner = NULL; 1601 } 1602 1603 void Parcel::scanForFds() const 1604 { 1605 bool hasFds = false; 1606 for (size_t i=0; i<mObjectsSize; i++) { 1607 const flat_binder_object* flat 1608 = reinterpret_cast<const flat_binder_object*>(mData + mObjects[i]); 1609 if (flat->type == BINDER_TYPE_FD) { 1610 hasFds = true; 1611 break; 1612 } 1613 } 1614 mHasFds = hasFds; 1615 mFdsKnown = true; 1616 } 1617 1618 // --- Parcel::Blob --- 1619 1620 Parcel::Blob::Blob() : 1621 mMapped(false), mData(NULL), mSize(0) { 1622 } 1623 1624 Parcel::Blob::~Blob() { 1625 release(); 1626 } 1627 1628 void Parcel::Blob::release() { 1629 if (mMapped && mData) { 1630 ::munmap(mData, mSize); 1631 } 1632 clear(); 1633 } 1634 1635 void Parcel::Blob::init(bool mapped, void* data, size_t size) { 1636 mMapped = mapped; 1637 mData = data; 1638 mSize = size; 1639 } 1640 1641 void Parcel::Blob::clear() { 1642 mMapped = false; 1643 mData = NULL; 1644 mSize = 0; 1645 } 1646 1647 }; // namespace android 1648
