1 /* 2 * Copyright (C) 2005 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #define LOG_TAG "Parcel" 18 //#define LOG_NDEBUG 0 19 20 #include <binder/Parcel.h> 21 22 #include <binder/IPCThreadState.h> 23 #include <binder/Binder.h> 24 #include <binder/BpBinder.h> 25 #include <binder/ProcessState.h> 26 #include <binder/TextOutput.h> 27 28 #include <utils/Debug.h> 29 #include <utils/Log.h> 30 #include <utils/String8.h> 31 #include <utils/String16.h> 32 #include <utils/misc.h> 33 #include <utils/Flattenable.h> 34 #include <cutils/ashmem.h> 35 36 #include <private/binder/binder_module.h> 37 38 #include <inttypes.h> 39 #include <stdio.h> 40 #include <stdlib.h> 41 #include <stdint.h> 42 #include <sys/mman.h> 43 44 #ifndef INT32_MAX 45 #define INT32_MAX ((int32_t)(2147483647)) 46 #endif 47 48 #define LOG_REFS(...) 49 //#define LOG_REFS(...) ALOG(LOG_DEBUG, "Parcel", __VA_ARGS__) 50 51 // --------------------------------------------------------------------------- 52 53 #define PAD_SIZE(s) (((s)+3)&~3) 54 55 // Note: must be kept in sync with android/os/StrictMode.java's PENALTY_GATHER 56 #define STRICT_MODE_PENALTY_GATHER 0x100 57 58 // Note: must be kept in sync with android/os/Parcel.java's EX_HAS_REPLY_HEADER 59 #define EX_HAS_REPLY_HEADER -128 60 61 // Maximum size of a blob to transfer in-place. 62 static const size_t IN_PLACE_BLOB_LIMIT = 40 * 1024; 63 64 // XXX This can be made public if we want to provide 65 // support for typed data. 66 struct small_flat_data 67 { 68 uint32_t type; 69 uint32_t data; 70 }; 71 72 namespace android { 73 74 void acquire_object(const sp<ProcessState>& proc, 75 const flat_binder_object& obj, const void* who) 76 { 77 switch (obj.type) { 78 case BINDER_TYPE_BINDER: 79 if (obj.binder) { 80 LOG_REFS("Parcel %p acquiring reference on local %p", who, obj.cookie); 81 static_cast<IBinder*>(obj.cookie)->incStrong(who); 82 } 83 return; 84 case BINDER_TYPE_WEAK_BINDER: 85 if (obj.binder) 86 static_cast<RefBase::weakref_type*>(obj.binder)->incWeak(who); 87 return; 88 case BINDER_TYPE_HANDLE: { 89 const sp<IBinder> b = proc->getStrongProxyForHandle(obj.handle); 90 if (b != NULL) { 91 LOG_REFS("Parcel %p acquiring reference on remote %p", who, b.get()); 92 b->incStrong(who); 93 } 94 return; 95 } 96 case BINDER_TYPE_WEAK_HANDLE: { 97 const wp<IBinder> b = proc->getWeakProxyForHandle(obj.handle); 98 if (b != NULL) b.get_refs()->incWeak(who); 99 return; 100 } 101 case BINDER_TYPE_FD: { 102 // intentionally blank -- nothing to do to acquire this, but we do 103 // recognize it as a legitimate object type. 104 return; 105 } 106 } 107 108 ALOGD("Invalid object type 0x%08lx", obj.type); 109 } 110 111 void release_object(const sp<ProcessState>& proc, 112 const flat_binder_object& obj, const void* who) 113 { 114 switch (obj.type) { 115 case BINDER_TYPE_BINDER: 116 if (obj.binder) { 117 LOG_REFS("Parcel %p releasing reference on local %p", who, obj.cookie); 118 static_cast<IBinder*>(obj.cookie)->decStrong(who); 119 } 120 return; 121 case BINDER_TYPE_WEAK_BINDER: 122 if (obj.binder) 123 static_cast<RefBase::weakref_type*>(obj.binder)->decWeak(who); 124 return; 125 case BINDER_TYPE_HANDLE: { 126 const sp<IBinder> b = proc->getStrongProxyForHandle(obj.handle); 127 if (b != NULL) { 128 LOG_REFS("Parcel %p releasing reference on remote %p", who, b.get()); 129 b->decStrong(who); 130 } 131 return; 132 } 133 case BINDER_TYPE_WEAK_HANDLE: { 134 const wp<IBinder> b = proc->getWeakProxyForHandle(obj.handle); 135 if (b != NULL) b.get_refs()->decWeak(who); 136 return; 137 } 138 case BINDER_TYPE_FD: { 139 if (obj.cookie != (void*)0) close(obj.handle); 140 return; 141 } 142 } 143 144 ALOGE("Invalid object type 0x%08lx", obj.type); 145 } 146 147 inline static status_t finish_flatten_binder( 148 const sp<IBinder>& binder, const flat_binder_object& flat, Parcel* out) 149 { 150 return out->writeObject(flat, false); 151 } 152 153 status_t flatten_binder(const sp<ProcessState>& proc, 154 const sp<IBinder>& binder, Parcel* out) 155 { 156 flat_binder_object obj; 157 158 obj.flags = 0x7f | FLAT_BINDER_FLAG_ACCEPTS_FDS; 159 if (binder != NULL) { 160 IBinder *local = binder->localBinder(); 161 if (!local) { 162 BpBinder *proxy = binder->remoteBinder(); 163 if (proxy == NULL) { 164 ALOGE("null proxy"); 165 } 166 const int32_t handle = proxy ? proxy->handle() : 0; 167 obj.type = BINDER_TYPE_HANDLE; 168 obj.handle = handle; 169 obj.cookie = NULL; 170 } else { 171 obj.type = BINDER_TYPE_BINDER; 172 obj.binder = local->getWeakRefs(); 173 obj.cookie = local; 174 } 175 } else { 176 obj.type = BINDER_TYPE_BINDER; 177 obj.binder = NULL; 178 obj.cookie = NULL; 179 } 180 181 return finish_flatten_binder(binder, obj, out); 182 } 183 184 status_t flatten_binder(const sp<ProcessState>& proc, 185 const wp<IBinder>& binder, Parcel* out) 186 { 187 flat_binder_object obj; 188 189 obj.flags = 0x7f | FLAT_BINDER_FLAG_ACCEPTS_FDS; 190 if (binder != NULL) { 191 sp<IBinder> real = binder.promote(); 192 if (real != NULL) { 193 IBinder *local = real->localBinder(); 194 if (!local) { 195 BpBinder *proxy = real->remoteBinder(); 196 if (proxy == NULL) { 197 ALOGE("null proxy"); 198 } 199 const int32_t handle = proxy ? proxy->handle() : 0; 200 obj.type = BINDER_TYPE_WEAK_HANDLE; 201 obj.handle = handle; 202 obj.cookie = NULL; 203 } else { 204 obj.type = BINDER_TYPE_WEAK_BINDER; 205 obj.binder = binder.get_refs(); 206 obj.cookie = binder.unsafe_get(); 207 } 208 return finish_flatten_binder(real, obj, out); 209 } 210 211 // XXX How to deal? In order to flatten the given binder, 212 // we need to probe it for information, which requires a primary 213 // reference... but we don't have one. 214 // 215 // The OpenBinder implementation uses a dynamic_cast<> here, 216 // but we can't do that with the different reference counting 217 // implementation we are using. 218 ALOGE("Unable to unflatten Binder weak reference!"); 219 obj.type = BINDER_TYPE_BINDER; 220 obj.binder = NULL; 221 obj.cookie = NULL; 222 return finish_flatten_binder(NULL, obj, out); 223 224 } else { 225 obj.type = BINDER_TYPE_BINDER; 226 obj.binder = NULL; 227 obj.cookie = NULL; 228 return finish_flatten_binder(NULL, obj, out); 229 } 230 } 231 232 inline static status_t finish_unflatten_binder( 233 BpBinder* proxy, const flat_binder_object& flat, const Parcel& in) 234 { 235 return NO_ERROR; 236 } 237 238 status_t unflatten_binder(const sp<ProcessState>& proc, 239 const Parcel& in, sp<IBinder>* out) 240 { 241 const flat_binder_object* flat = in.readObject(false); 242 243 if (flat) { 244 switch (flat->type) { 245 case BINDER_TYPE_BINDER: 246 *out = static_cast<IBinder*>(flat->cookie); 247 return finish_unflatten_binder(NULL, *flat, in); 248 case BINDER_TYPE_HANDLE: 249 *out = proc->getStrongProxyForHandle(flat->handle); 250 return finish_unflatten_binder( 251 static_cast<BpBinder*>(out->get()), *flat, in); 252 } 253 } 254 return BAD_TYPE; 255 } 256 257 status_t unflatten_binder(const sp<ProcessState>& proc, 258 const Parcel& in, wp<IBinder>* out) 259 { 260 const flat_binder_object* flat = in.readObject(false); 261 262 if (flat) { 263 switch (flat->type) { 264 case BINDER_TYPE_BINDER: 265 *out = static_cast<IBinder*>(flat->cookie); 266 return finish_unflatten_binder(NULL, *flat, in); 267 case BINDER_TYPE_WEAK_BINDER: 268 if (flat->binder != NULL) { 269 out->set_object_and_refs( 270 static_cast<IBinder*>(flat->cookie), 271 static_cast<RefBase::weakref_type*>(flat->binder)); 272 } else { 273 *out = NULL; 274 } 275 return finish_unflatten_binder(NULL, *flat, in); 276 case BINDER_TYPE_HANDLE: 277 case BINDER_TYPE_WEAK_HANDLE: 278 *out = proc->getWeakProxyForHandle(flat->handle); 279 return finish_unflatten_binder( 280 static_cast<BpBinder*>(out->unsafe_get()), *flat, in); 281 } 282 } 283 return BAD_TYPE; 284 } 285 286 // --------------------------------------------------------------------------- 287 288 Parcel::Parcel() 289 { 290 initState(); 291 } 292 293 Parcel::~Parcel() 294 { 295 freeDataNoInit(); 296 } 297 298 const uint8_t* Parcel::data() const 299 { 300 return mData; 301 } 302 303 size_t Parcel::dataSize() const 304 { 305 return (mDataSize > mDataPos ? mDataSize : mDataPos); 306 } 307 308 size_t Parcel::dataAvail() const 309 { 310 // TODO: decide what to do about the possibility that this can 311 // report an available-data size that exceeds a Java int's max 312 // positive value, causing havoc. Fortunately this will only 313 // happen if someone constructs a Parcel containing more than two 314 // gigabytes of data, which on typical phone hardware is simply 315 // not possible. 316 return dataSize() - dataPosition(); 317 } 318 319 size_t Parcel::dataPosition() const 320 { 321 return mDataPos; 322 } 323 324 size_t Parcel::dataCapacity() const 325 { 326 return mDataCapacity; 327 } 328 329 status_t Parcel::setDataSize(size_t size) 330 { 331 status_t err; 332 err = continueWrite(size); 333 if (err == NO_ERROR) { 334 mDataSize = size; 335 ALOGV("setDataSize Setting data size of %p to %d\n", this, mDataSize); 336 } 337 return err; 338 } 339 340 void Parcel::setDataPosition(size_t pos) const 341 { 342 mDataPos = pos; 343 mNextObjectHint = 0; 344 } 345 346 status_t Parcel::setDataCapacity(size_t size) 347 { 348 if (size > mDataCapacity) return continueWrite(size); 349 return NO_ERROR; 350 } 351 352 status_t Parcel::setData(const uint8_t* buffer, size_t len) 353 { 354 status_t err = restartWrite(len); 355 if (err == NO_ERROR) { 356 memcpy(const_cast<uint8_t*>(data()), buffer, len); 357 mDataSize = len; 358 mFdsKnown = false; 359 } 360 return err; 361 } 362 363 status_t Parcel::appendFrom(const Parcel *parcel, size_t offset, size_t len) 364 { 365 const sp<ProcessState> proc(ProcessState::self()); 366 status_t err; 367 const uint8_t *data = parcel->mData; 368 const size_t *objects = parcel->mObjects; 369 size_t size = parcel->mObjectsSize; 370 int startPos = mDataPos; 371 int firstIndex = -1, lastIndex = -2; 372 373 if (len == 0) { 374 return NO_ERROR; 375 } 376 377 // range checks against the source parcel size 378 if ((offset > parcel->mDataSize) 379 || (len > parcel->mDataSize) 380 || (offset + len > parcel->mDataSize)) { 381 return BAD_VALUE; 382 } 383 384 // Count objects in range 385 for (int i = 0; i < (int) size; i++) { 386 size_t off = objects[i]; 387 if ((off >= offset) && (off < offset + len)) { 388 if (firstIndex == -1) { 389 firstIndex = i; 390 } 391 lastIndex = i; 392 } 393 } 394 int numObjects = lastIndex - firstIndex + 1; 395 396 if ((mDataSize+len) > mDataCapacity) { 397 // grow data 398 err = growData(len); 399 if (err != NO_ERROR) { 400 return err; 401 } 402 } 403 404 // append data 405 memcpy(mData + mDataPos, data + offset, len); 406 mDataPos += len; 407 mDataSize += len; 408 409 err = NO_ERROR; 410 411 if (numObjects > 0) { 412 // grow objects 413 if (mObjectsCapacity < mObjectsSize + numObjects) { 414 int newSize = ((mObjectsSize + numObjects)*3)/2; 415 size_t *objects = 416 (size_t*)realloc(mObjects, newSize*sizeof(size_t)); 417 if (objects == (size_t*)0) { 418 return NO_MEMORY; 419 } 420 mObjects = objects; 421 mObjectsCapacity = newSize; 422 } 423 424 // append and acquire objects 425 int idx = mObjectsSize; 426 for (int i = firstIndex; i <= lastIndex; i++) { 427 size_t off = objects[i] - offset + startPos; 428 mObjects[idx++] = off; 429 mObjectsSize++; 430 431 flat_binder_object* flat 432 = reinterpret_cast<flat_binder_object*>(mData + off); 433 acquire_object(proc, *flat, this); 434 435 if (flat->type == BINDER_TYPE_FD) { 436 // If this is a file descriptor, we need to dup it so the 437 // new Parcel now owns its own fd, and can declare that we 438 // officially know we have fds. 439 flat->handle = dup(flat->handle); 440 flat->cookie = (void*)1; 441 mHasFds = mFdsKnown = true; 442 if (!mAllowFds) { 443 err = FDS_NOT_ALLOWED; 444 } 445 } 446 } 447 } 448 449 return err; 450 } 451 452 bool Parcel::pushAllowFds(bool allowFds) 453 { 454 const bool origValue = mAllowFds; 455 if (!allowFds) { 456 mAllowFds = false; 457 } 458 return origValue; 459 } 460 461 void Parcel::restoreAllowFds(bool lastValue) 462 { 463 mAllowFds = lastValue; 464 } 465 466 bool Parcel::hasFileDescriptors() const 467 { 468 if (!mFdsKnown) { 469 scanForFds(); 470 } 471 return mHasFds; 472 } 473 474 // Write RPC headers. (previously just the interface token) 475 status_t Parcel::writeInterfaceToken(const String16& interface) 476 { 477 writeInt32(IPCThreadState::self()->getStrictModePolicy() | 478 STRICT_MODE_PENALTY_GATHER); 479 // currently the interface identification token is just its name as a string 480 return writeString16(interface); 481 } 482 483 bool Parcel::checkInterface(IBinder* binder) const 484 { 485 return enforceInterface(binder->getInterfaceDescriptor()); 486 } 487 488 bool Parcel::enforceInterface(const String16& interface, 489 IPCThreadState* threadState) const 490 { 491 int32_t strictPolicy = readInt32(); 492 if (threadState == NULL) { 493 threadState = IPCThreadState::self(); 494 } 495 if ((threadState->getLastTransactionBinderFlags() & 496 IBinder::FLAG_ONEWAY) != 0) { 497 // For one-way calls, the callee is running entirely 498 // disconnected from the caller, so disable StrictMode entirely. 499 // Not only does disk/network usage not impact the caller, but 500 // there's no way to commuicate back any violations anyway. 501 threadState->setStrictModePolicy(0); 502 } else { 503 threadState->setStrictModePolicy(strictPolicy); 504 } 505 const String16 str(readString16()); 506 if (str == interface) { 507 return true; 508 } else { 509 ALOGW("**** enforceInterface() expected '%s' but read '%s'\n", 510 String8(interface).string(), String8(str).string()); 511 return false; 512 } 513 } 514 515 const size_t* Parcel::objects() const 516 { 517 return mObjects; 518 } 519 520 size_t Parcel::objectsCount() const 521 { 522 return mObjectsSize; 523 } 524 525 status_t Parcel::errorCheck() const 526 { 527 return mError; 528 } 529 530 void Parcel::setError(status_t err) 531 { 532 mError = err; 533 } 534 535 status_t Parcel::finishWrite(size_t len) 536 { 537 //printf("Finish write of %d\n", len); 538 mDataPos += len; 539 ALOGV("finishWrite Setting data pos of %p to %d\n", this, mDataPos); 540 if (mDataPos > mDataSize) { 541 mDataSize = mDataPos; 542 ALOGV("finishWrite Setting data size of %p to %d\n", this, mDataSize); 543 } 544 //printf("New pos=%d, size=%d\n", mDataPos, mDataSize); 545 return NO_ERROR; 546 } 547 548 status_t Parcel::writeUnpadded(const void* data, size_t len) 549 { 550 size_t end = mDataPos + len; 551 if (end < mDataPos) { 552 // integer overflow 553 return BAD_VALUE; 554 } 555 556 if (end <= mDataCapacity) { 557 restart_write: 558 memcpy(mData+mDataPos, data, len); 559 return finishWrite(len); 560 } 561 562 status_t err = growData(len); 563 if (err == NO_ERROR) goto restart_write; 564 return err; 565 } 566 567 status_t Parcel::write(const void* data, size_t len) 568 { 569 void* const d = writeInplace(len); 570 if (d) { 571 memcpy(d, data, len); 572 return NO_ERROR; 573 } 574 return mError; 575 } 576 577 void* Parcel::writeInplace(size_t len) 578 { 579 const size_t padded = PAD_SIZE(len); 580 581 // sanity check for integer overflow 582 if (mDataPos+padded < mDataPos) { 583 return NULL; 584 } 585 586 if ((mDataPos+padded) <= mDataCapacity) { 587 restart_write: 588 //printf("Writing %ld bytes, padded to %ld\n", len, padded); 589 uint8_t* const data = mData+mDataPos; 590 591 // Need to pad at end? 592 if (padded != len) { 593 #if BYTE_ORDER == BIG_ENDIAN 594 static const uint32_t mask[4] = { 595 0x00000000, 0xffffff00, 0xffff0000, 0xff000000 596 }; 597 #endif 598 #if BYTE_ORDER == LITTLE_ENDIAN 599 static const uint32_t mask[4] = { 600 0x00000000, 0x00ffffff, 0x0000ffff, 0x000000ff 601 }; 602 #endif 603 //printf("Applying pad mask: %p to %p\n", (void*)mask[padded-len], 604 // *reinterpret_cast<void**>(data+padded-4)); 605 *reinterpret_cast<uint32_t*>(data+padded-4) &= mask[padded-len]; 606 } 607 608 finishWrite(padded); 609 return data; 610 } 611 612 status_t err = growData(padded); 613 if (err == NO_ERROR) goto restart_write; 614 return NULL; 615 } 616 617 status_t Parcel::writeInt32(int32_t val) 618 { 619 return writeAligned(val); 620 } 621 status_t Parcel::writeInt32Array(size_t len, const int32_t *val) { 622 if (!val) { 623 return writeAligned(-1); 624 } 625 status_t ret = writeAligned(len); 626 if (ret == NO_ERROR) { 627 ret = write(val, len * sizeof(*val)); 628 } 629 return ret; 630 } 631 status_t Parcel::writeByteArray(size_t len, const uint8_t *val) { 632 if (!val) { 633 return writeAligned(-1); 634 } 635 status_t ret = writeAligned(len); 636 if (ret == NO_ERROR) { 637 ret = write(val, len * sizeof(*val)); 638 } 639 return ret; 640 } 641 642 status_t Parcel::writeInt64(int64_t val) 643 { 644 return writeAligned(val); 645 } 646 647 status_t Parcel::writeFloat(float val) 648 { 649 return writeAligned(val); 650 } 651 652 #if defined(__mips__) && defined(__mips_hard_float) 653 654 status_t Parcel::writeDouble(double val) 655 { 656 union { 657 double d; 658 unsigned long long ll; 659 } u; 660 u.d = val; 661 return writeAligned(u.ll); 662 } 663 664 #else 665 666 status_t Parcel::writeDouble(double val) 667 { 668 return writeAligned(val); 669 } 670 671 #endif 672 673 status_t Parcel::writeIntPtr(intptr_t val) 674 { 675 return writeAligned(val); 676 } 677 678 status_t Parcel::writeCString(const char* str) 679 { 680 return write(str, strlen(str)+1); 681 } 682 683 status_t Parcel::writeString8(const String8& str) 684 { 685 status_t err = writeInt32(str.bytes()); 686 // only write string if its length is more than zero characters, 687 // as readString8 will only read if the length field is non-zero. 688 // this is slightly different from how writeString16 works. 689 if (str.bytes() > 0 && err == NO_ERROR) { 690 err = write(str.string(), str.bytes()+1); 691 } 692 return err; 693 } 694 695 status_t Parcel::writeString16(const String16& str) 696 { 697 return writeString16(str.string(), str.size()); 698 } 699 700 status_t Parcel::writeString16(const char16_t* str, size_t len) 701 { 702 if (str == NULL) return writeInt32(-1); 703 704 status_t err = writeInt32(len); 705 if (err == NO_ERROR) { 706 len *= sizeof(char16_t); 707 uint8_t* data = (uint8_t*)writeInplace(len+sizeof(char16_t)); 708 if (data) { 709 memcpy(data, str, len); 710 *reinterpret_cast<char16_t*>(data+len) = 0; 711 return NO_ERROR; 712 } 713 err = mError; 714 } 715 return err; 716 } 717 718 status_t Parcel::writeStrongBinder(const sp<IBinder>& val) 719 { 720 return flatten_binder(ProcessState::self(), val, this); 721 } 722 723 status_t Parcel::writeWeakBinder(const wp<IBinder>& val) 724 { 725 return flatten_binder(ProcessState::self(), val, this); 726 } 727 728 status_t Parcel::writeNativeHandle(const native_handle* handle) 729 { 730 if (!handle || handle->version != sizeof(native_handle)) 731 return BAD_TYPE; 732 733 status_t err; 734 err = writeInt32(handle->numFds); 735 if (err != NO_ERROR) return err; 736 737 err = writeInt32(handle->numInts); 738 if (err != NO_ERROR) return err; 739 740 for (int i=0 ; err==NO_ERROR && i<handle->numFds ; i++) 741 err = writeDupFileDescriptor(handle->data[i]); 742 743 if (err != NO_ERROR) { 744 ALOGD("write native handle, write dup fd failed"); 745 return err; 746 } 747 err = write(handle->data + handle->numFds, sizeof(int)*handle->numInts); 748 return err; 749 } 750 751 status_t Parcel::writeFileDescriptor(int fd, bool takeOwnership) 752 { 753 flat_binder_object obj; 754 obj.type = BINDER_TYPE_FD; 755 obj.flags = 0x7f | FLAT_BINDER_FLAG_ACCEPTS_FDS; 756 obj.handle = fd; 757 obj.cookie = (void*) (takeOwnership ? 1 : 0); 758 return writeObject(obj, true); 759 } 760 761 status_t Parcel::writeDupFileDescriptor(int fd) 762 { 763 int dupFd = dup(fd); 764 if (dupFd < 0) { 765 return -errno; 766 } 767 status_t err = writeFileDescriptor(dupFd, true /*takeOwnership*/); 768 if (err) { 769 close(dupFd); 770 } 771 return err; 772 } 773 774 status_t Parcel::writeBlob(size_t len, WritableBlob* outBlob) 775 { 776 status_t status; 777 778 if (!mAllowFds || len <= IN_PLACE_BLOB_LIMIT) { 779 ALOGV("writeBlob: write in place"); 780 status = writeInt32(0); 781 if (status) return status; 782 783 void* ptr = writeInplace(len); 784 if (!ptr) return NO_MEMORY; 785 786 outBlob->init(false /*mapped*/, ptr, len); 787 return NO_ERROR; 788 } 789 790 ALOGV("writeBlob: write to ashmem"); 791 int fd = ashmem_create_region("Parcel Blob", len); 792 if (fd < 0) return NO_MEMORY; 793 794 int result = ashmem_set_prot_region(fd, PROT_READ | PROT_WRITE); 795 if (result < 0) { 796 status = result; 797 } else { 798 void* ptr = ::mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); 799 if (ptr == MAP_FAILED) { 800 status = -errno; 801 } else { 802 result = ashmem_set_prot_region(fd, PROT_READ); 803 if (result < 0) { 804 status = result; 805 } else { 806 status = writeInt32(1); 807 if (!status) { 808 status = writeFileDescriptor(fd, true /*takeOwnership*/); 809 if (!status) { 810 outBlob->init(true /*mapped*/, ptr, len); 811 return NO_ERROR; 812 } 813 } 814 } 815 } 816 ::munmap(ptr, len); 817 } 818 ::close(fd); 819 return status; 820 } 821 822 status_t Parcel::write(const FlattenableHelperInterface& val) 823 { 824 status_t err; 825 826 // size if needed 827 const size_t len = val.getFlattenedSize(); 828 const size_t fd_count = val.getFdCount(); 829 830 err = this->writeInt32(len); 831 if (err) return err; 832 833 err = this->writeInt32(fd_count); 834 if (err) return err; 835 836 // payload 837 void* const buf = this->writeInplace(PAD_SIZE(len)); 838 if (buf == NULL) 839 return BAD_VALUE; 840 841 int* fds = NULL; 842 if (fd_count) { 843 fds = new int[fd_count]; 844 } 845 846 err = val.flatten(buf, len, fds, fd_count); 847 for (size_t i=0 ; i<fd_count && err==NO_ERROR ; i++) { 848 err = this->writeDupFileDescriptor( fds[i] ); 849 } 850 851 if (fd_count) { 852 delete [] fds; 853 } 854 855 return err; 856 } 857 858 status_t Parcel::writeObject(const flat_binder_object& val, bool nullMetaData) 859 { 860 const bool enoughData = (mDataPos+sizeof(val)) <= mDataCapacity; 861 const bool enoughObjects = mObjectsSize < mObjectsCapacity; 862 if (enoughData && enoughObjects) { 863 restart_write: 864 *reinterpret_cast<flat_binder_object*>(mData+mDataPos) = val; 865 866 // Need to write meta-data? 867 if (nullMetaData || val.binder != NULL) { 868 mObjects[mObjectsSize] = mDataPos; 869 acquire_object(ProcessState::self(), val, this); 870 mObjectsSize++; 871 } 872 873 // remember if it's a file descriptor 874 if (val.type == BINDER_TYPE_FD) { 875 if (!mAllowFds) { 876 return FDS_NOT_ALLOWED; 877 } 878 mHasFds = mFdsKnown = true; 879 } 880 881 return finishWrite(sizeof(flat_binder_object)); 882 } 883 884 if (!enoughData) { 885 const status_t err = growData(sizeof(val)); 886 if (err != NO_ERROR) return err; 887 } 888 if (!enoughObjects) { 889 size_t newSize = ((mObjectsSize+2)*3)/2; 890 size_t* objects = (size_t*)realloc(mObjects, newSize*sizeof(size_t)); 891 if (objects == NULL) return NO_MEMORY; 892 mObjects = objects; 893 mObjectsCapacity = newSize; 894 } 895 896 goto restart_write; 897 } 898 899 status_t Parcel::writeNoException() 900 { 901 return writeInt32(0); 902 } 903 904 void Parcel::remove(size_t start, size_t amt) 905 { 906 LOG_ALWAYS_FATAL("Parcel::remove() not yet implemented!"); 907 } 908 909 status_t Parcel::read(void* outData, size_t len) const 910 { 911 if ((mDataPos+PAD_SIZE(len)) >= mDataPos && (mDataPos+PAD_SIZE(len)) <= mDataSize 912 && len <= PAD_SIZE(len)) { 913 memcpy(outData, mData+mDataPos, len); 914 mDataPos += PAD_SIZE(len); 915 ALOGV("read Setting data pos of %p to %d\n", this, mDataPos); 916 return NO_ERROR; 917 } 918 return NOT_ENOUGH_DATA; 919 } 920 921 const void* Parcel::readInplace(size_t len) const 922 { 923 if ((mDataPos+PAD_SIZE(len)) >= mDataPos && (mDataPos+PAD_SIZE(len)) <= mDataSize 924 && len <= PAD_SIZE(len)) { 925 const void* data = mData+mDataPos; 926 mDataPos += PAD_SIZE(len); 927 ALOGV("readInplace Setting data pos of %p to %d\n", this, mDataPos); 928 return data; 929 } 930 return NULL; 931 } 932 933 template<class T> 934 status_t Parcel::readAligned(T *pArg) const { 935 COMPILE_TIME_ASSERT_FUNCTION_SCOPE(PAD_SIZE(sizeof(T)) == sizeof(T)); 936 937 if ((mDataPos+sizeof(T)) <= mDataSize) { 938 const void* data = mData+mDataPos; 939 mDataPos += sizeof(T); 940 *pArg = *reinterpret_cast<const T*>(data); 941 return NO_ERROR; 942 } else { 943 return NOT_ENOUGH_DATA; 944 } 945 } 946 947 template<class T> 948 T Parcel::readAligned() const { 949 T result; 950 if (readAligned(&result) != NO_ERROR) { 951 result = 0; 952 } 953 954 return result; 955 } 956 957 template<class T> 958 status_t Parcel::writeAligned(T val) { 959 COMPILE_TIME_ASSERT_FUNCTION_SCOPE(PAD_SIZE(sizeof(T)) == sizeof(T)); 960 961 if ((mDataPos+sizeof(val)) <= mDataCapacity) { 962 restart_write: 963 *reinterpret_cast<T*>(mData+mDataPos) = val; 964 return finishWrite(sizeof(val)); 965 } 966 967 status_t err = growData(sizeof(val)); 968 if (err == NO_ERROR) goto restart_write; 969 return err; 970 } 971 972 status_t Parcel::readInt32(int32_t *pArg) const 973 { 974 return readAligned(pArg); 975 } 976 977 int32_t Parcel::readInt32() const 978 { 979 return readAligned<int32_t>(); 980 } 981 982 983 status_t Parcel::readInt64(int64_t *pArg) const 984 { 985 return readAligned(pArg); 986 } 987 988 989 int64_t Parcel::readInt64() const 990 { 991 return readAligned<int64_t>(); 992 } 993 994 status_t Parcel::readFloat(float *pArg) const 995 { 996 return readAligned(pArg); 997 } 998 999 1000 float Parcel::readFloat() const 1001 { 1002 return readAligned<float>(); 1003 } 1004 1005 #if defined(__mips__) && defined(__mips_hard_float) 1006 1007 status_t Parcel::readDouble(double *pArg) const 1008 { 1009 union { 1010 double d; 1011 unsigned long long ll; 1012 } u; 1013 status_t status; 1014 status = readAligned(&u.ll); 1015 *pArg = u.d; 1016 return status; 1017 } 1018 1019 double Parcel::readDouble() const 1020 { 1021 union { 1022 double d; 1023 unsigned long long ll; 1024 } u; 1025 u.ll = readAligned<unsigned long long>(); 1026 return u.d; 1027 } 1028 1029 #else 1030 1031 status_t Parcel::readDouble(double *pArg) const 1032 { 1033 return readAligned(pArg); 1034 } 1035 1036 double Parcel::readDouble() const 1037 { 1038 return readAligned<double>(); 1039 } 1040 1041 #endif 1042 1043 status_t Parcel::readIntPtr(intptr_t *pArg) const 1044 { 1045 return readAligned(pArg); 1046 } 1047 1048 1049 intptr_t Parcel::readIntPtr() const 1050 { 1051 return readAligned<intptr_t>(); 1052 } 1053 1054 1055 const char* Parcel::readCString() const 1056 { 1057 const size_t avail = mDataSize-mDataPos; 1058 if (avail > 0) { 1059 const char* str = reinterpret_cast<const char*>(mData+mDataPos); 1060 // is the string's trailing NUL within the parcel's valid bounds? 1061 const char* eos = reinterpret_cast<const char*>(memchr(str, 0, avail)); 1062 if (eos) { 1063 const size_t len = eos - str; 1064 mDataPos += PAD_SIZE(len+1); 1065 ALOGV("readCString Setting data pos of %p to %d\n", this, mDataPos); 1066 return str; 1067 } 1068 } 1069 return NULL; 1070 } 1071 1072 String8 Parcel::readString8() const 1073 { 1074 int32_t size = readInt32(); 1075 // watch for potential int overflow adding 1 for trailing NUL 1076 if (size > 0 && size < INT32_MAX) { 1077 const char* str = (const char*)readInplace(size+1); 1078 if (str) return String8(str, size); 1079 } 1080 return String8(); 1081 } 1082 1083 String16 Parcel::readString16() const 1084 { 1085 size_t len; 1086 const char16_t* str = readString16Inplace(&len); 1087 if (str) return String16(str, len); 1088 ALOGE("Reading a NULL string not supported here."); 1089 return String16(); 1090 } 1091 1092 const char16_t* Parcel::readString16Inplace(size_t* outLen) const 1093 { 1094 int32_t size = readInt32(); 1095 // watch for potential int overflow from size+1 1096 if (size >= 0 && size < INT32_MAX) { 1097 *outLen = size; 1098 const char16_t* str = (const char16_t*)readInplace((size+1)*sizeof(char16_t)); 1099 if (str != NULL) { 1100 return str; 1101 } 1102 } 1103 *outLen = 0; 1104 return NULL; 1105 } 1106 1107 sp<IBinder> Parcel::readStrongBinder() const 1108 { 1109 sp<IBinder> val; 1110 unflatten_binder(ProcessState::self(), *this, &val); 1111 return val; 1112 } 1113 1114 wp<IBinder> Parcel::readWeakBinder() const 1115 { 1116 wp<IBinder> val; 1117 unflatten_binder(ProcessState::self(), *this, &val); 1118 return val; 1119 } 1120 1121 int32_t Parcel::readExceptionCode() const 1122 { 1123 int32_t exception_code = readAligned<int32_t>(); 1124 if (exception_code == EX_HAS_REPLY_HEADER) { 1125 int32_t header_start = dataPosition(); 1126 int32_t header_size = readAligned<int32_t>(); 1127 // Skip over fat responses headers. Not used (or propagated) in 1128 // native code 1129 setDataPosition(header_start + header_size); 1130 // And fat response headers are currently only used when there are no 1131 // exceptions, so return no error: 1132 return 0; 1133 } 1134 return exception_code; 1135 } 1136 1137 native_handle* Parcel::readNativeHandle() const 1138 { 1139 int numFds, numInts; 1140 status_t err; 1141 err = readInt32(&numFds); 1142 if (err != NO_ERROR) return 0; 1143 err = readInt32(&numInts); 1144 if (err != NO_ERROR) return 0; 1145 1146 native_handle* h = native_handle_create(numFds, numInts); 1147 for (int i=0 ; err==NO_ERROR && i<numFds ; i++) { 1148 h->data[i] = dup(readFileDescriptor()); 1149 if (h->data[i] < 0) err = BAD_VALUE; 1150 } 1151 err = read(h->data + numFds, sizeof(int)*numInts); 1152 if (err != NO_ERROR) { 1153 native_handle_close(h); 1154 native_handle_delete(h); 1155 h = 0; 1156 } 1157 return h; 1158 } 1159 1160 1161 int Parcel::readFileDescriptor() const 1162 { 1163 const flat_binder_object* flat = readObject(true); 1164 if (flat) { 1165 switch (flat->type) { 1166 case BINDER_TYPE_FD: 1167 //ALOGI("Returning file descriptor %ld from parcel %p\n", flat->handle, this); 1168 return flat->handle; 1169 } 1170 } 1171 return BAD_TYPE; 1172 } 1173 1174 status_t Parcel::readBlob(size_t len, ReadableBlob* outBlob) const 1175 { 1176 int32_t useAshmem; 1177 status_t status = readInt32(&useAshmem); 1178 if (status) return status; 1179 1180 if (!useAshmem) { 1181 ALOGV("readBlob: read in place"); 1182 const void* ptr = readInplace(len); 1183 if (!ptr) return BAD_VALUE; 1184 1185 outBlob->init(false /*mapped*/, const_cast<void*>(ptr), len); 1186 return NO_ERROR; 1187 } 1188 1189 ALOGV("readBlob: read from ashmem"); 1190 int fd = readFileDescriptor(); 1191 if (fd == int(BAD_TYPE)) return BAD_VALUE; 1192 1193 void* ptr = ::mmap(NULL, len, PROT_READ, MAP_SHARED, fd, 0); 1194 if (!ptr) return NO_MEMORY; 1195 1196 outBlob->init(true /*mapped*/, ptr, len); 1197 return NO_ERROR; 1198 } 1199 1200 status_t Parcel::read(FlattenableHelperInterface& val) const 1201 { 1202 // size 1203 const size_t len = this->readInt32(); 1204 const size_t fd_count = this->readInt32(); 1205 1206 // payload 1207 void const* const buf = this->readInplace(PAD_SIZE(len)); 1208 if (buf == NULL) 1209 return BAD_VALUE; 1210 1211 int* fds = NULL; 1212 if (fd_count) { 1213 fds = new int[fd_count]; 1214 } 1215 1216 status_t err = NO_ERROR; 1217 for (size_t i=0 ; i<fd_count && err==NO_ERROR ; i++) { 1218 fds[i] = dup(this->readFileDescriptor()); 1219 if (fds[i] < 0) err = BAD_VALUE; 1220 } 1221 1222 if (err == NO_ERROR) { 1223 err = val.unflatten(buf, len, fds, fd_count); 1224 } 1225 1226 if (fd_count) { 1227 delete [] fds; 1228 } 1229 1230 return err; 1231 } 1232 const flat_binder_object* Parcel::readObject(bool nullMetaData) const 1233 { 1234 const size_t DPOS = mDataPos; 1235 if ((DPOS+sizeof(flat_binder_object)) <= mDataSize) { 1236 const flat_binder_object* obj 1237 = reinterpret_cast<const flat_binder_object*>(mData+DPOS); 1238 mDataPos = DPOS + sizeof(flat_binder_object); 1239 if (!nullMetaData && (obj->cookie == NULL && obj->binder == NULL)) { 1240 // When transferring a NULL object, we don't write it into 1241 // the object list, so we don't want to check for it when 1242 // reading. 1243 ALOGV("readObject Setting data pos of %p to %d\n", this, mDataPos); 1244 return obj; 1245 } 1246 1247 // Ensure that this object is valid... 1248 size_t* const OBJS = mObjects; 1249 const size_t N = mObjectsSize; 1250 size_t opos = mNextObjectHint; 1251 1252 if (N > 0) { 1253 ALOGV("Parcel %p looking for obj at %d, hint=%d\n", 1254 this, DPOS, opos); 1255 1256 // Start at the current hint position, looking for an object at 1257 // the current data position. 1258 if (opos < N) { 1259 while (opos < (N-1) && OBJS[opos] < DPOS) { 1260 opos++; 1261 } 1262 } else { 1263 opos = N-1; 1264 } 1265 if (OBJS[opos] == DPOS) { 1266 // Found it! 1267 ALOGV("Parcel found obj %d at index %d with forward 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 // Look backwards for it... 1275 while (opos > 0 && OBJS[opos] > DPOS) { 1276 opos--; 1277 } 1278 if (OBJS[opos] == DPOS) { 1279 // Found it! 1280 ALOGV("Parcel found obj %d at index %d with backward search", 1281 this, DPOS, opos); 1282 mNextObjectHint = opos+1; 1283 ALOGV("readObject Setting data pos of %p to %d\n", this, mDataPos); 1284 return obj; 1285 } 1286 } 1287 ALOGW("Attempt to read object from Parcel %p at offset %d that is not in the object list", 1288 this, DPOS); 1289 } 1290 return NULL; 1291 } 1292 1293 void Parcel::closeFileDescriptors() 1294 { 1295 size_t i = mObjectsSize; 1296 if (i > 0) { 1297 //ALOGI("Closing file descriptors for %d objects...", mObjectsSize); 1298 } 1299 while (i > 0) { 1300 i--; 1301 const flat_binder_object* flat 1302 = reinterpret_cast<flat_binder_object*>(mData+mObjects[i]); 1303 if (flat->type == BINDER_TYPE_FD) { 1304 //ALOGI("Closing fd: %ld\n", flat->handle); 1305 close(flat->handle); 1306 } 1307 } 1308 } 1309 1310 const uint8_t* Parcel::ipcData() const 1311 { 1312 return mData; 1313 } 1314 1315 size_t Parcel::ipcDataSize() const 1316 { 1317 return (mDataSize > mDataPos ? mDataSize : mDataPos); 1318 } 1319 1320 const size_t* Parcel::ipcObjects() const 1321 { 1322 return mObjects; 1323 } 1324 1325 size_t Parcel::ipcObjectsCount() const 1326 { 1327 return mObjectsSize; 1328 } 1329 1330 void Parcel::ipcSetDataReference(const uint8_t* data, size_t dataSize, 1331 const size_t* objects, size_t objectsCount, release_func relFunc, void* relCookie) 1332 { 1333 size_t minOffset = 0; 1334 freeDataNoInit(); 1335 mError = NO_ERROR; 1336 mData = const_cast<uint8_t*>(data); 1337 mDataSize = mDataCapacity = dataSize; 1338 //ALOGI("setDataReference Setting data size of %p to %lu (pid=%d)\n", this, mDataSize, getpid()); 1339 mDataPos = 0; 1340 ALOGV("setDataReference Setting data pos of %p to %d\n", this, mDataPos); 1341 mObjects = const_cast<size_t*>(objects); 1342 mObjectsSize = mObjectsCapacity = objectsCount; 1343 mNextObjectHint = 0; 1344 mOwner = relFunc; 1345 mOwnerCookie = relCookie; 1346 for (size_t i = 0; i < mObjectsSize; i++) { 1347 size_t offset = mObjects[i]; 1348 if (offset < minOffset) { 1349 ALOGE("%s: bad object offset %zu < %zu\n", 1350 __func__, offset, minOffset); 1351 mObjectsSize = 0; 1352 break; 1353 } 1354 minOffset = offset + sizeof(flat_binder_object); 1355 } 1356 scanForFds(); 1357 } 1358 1359 void Parcel::print(TextOutput& to, uint32_t flags) const 1360 { 1361 to << "Parcel("; 1362 1363 if (errorCheck() != NO_ERROR) { 1364 const status_t err = errorCheck(); 1365 to << "Error: " << (void*)err << " \"" << strerror(-err) << "\""; 1366 } else if (dataSize() > 0) { 1367 const uint8_t* DATA = data(); 1368 to << indent << HexDump(DATA, dataSize()) << dedent; 1369 const size_t* OBJS = objects(); 1370 const size_t N = objectsCount(); 1371 for (size_t i=0; i<N; i++) { 1372 const flat_binder_object* flat 1373 = reinterpret_cast<const flat_binder_object*>(DATA+OBJS[i]); 1374 to << endl << "Object #" << i << " @ " << (void*)OBJS[i] << ": " 1375 << TypeCode(flat->type & 0x7f7f7f00) 1376 << " = " << flat->binder; 1377 } 1378 } else { 1379 to << "NULL"; 1380 } 1381 1382 to << ")"; 1383 } 1384 1385 void Parcel::releaseObjects() 1386 { 1387 const sp<ProcessState> proc(ProcessState::self()); 1388 size_t i = mObjectsSize; 1389 uint8_t* const data = mData; 1390 size_t* const objects = mObjects; 1391 while (i > 0) { 1392 i--; 1393 const flat_binder_object* flat 1394 = reinterpret_cast<flat_binder_object*>(data+objects[i]); 1395 release_object(proc, *flat, this); 1396 } 1397 } 1398 1399 void Parcel::acquireObjects() 1400 { 1401 const sp<ProcessState> proc(ProcessState::self()); 1402 size_t i = mObjectsSize; 1403 uint8_t* const data = mData; 1404 size_t* const objects = mObjects; 1405 while (i > 0) { 1406 i--; 1407 const flat_binder_object* flat 1408 = reinterpret_cast<flat_binder_object*>(data+objects[i]); 1409 acquire_object(proc, *flat, this); 1410 } 1411 } 1412 1413 void Parcel::freeData() 1414 { 1415 freeDataNoInit(); 1416 initState(); 1417 } 1418 1419 void Parcel::freeDataNoInit() 1420 { 1421 if (mOwner) { 1422 //ALOGI("Freeing data ref of %p (pid=%d)\n", this, getpid()); 1423 mOwner(this, mData, mDataSize, mObjects, mObjectsSize, mOwnerCookie); 1424 } else { 1425 releaseObjects(); 1426 if (mData) free(mData); 1427 if (mObjects) free(mObjects); 1428 } 1429 } 1430 1431 status_t Parcel::growData(size_t len) 1432 { 1433 size_t newSize = ((mDataSize+len)*3)/2; 1434 return (newSize <= mDataSize) 1435 ? (status_t) NO_MEMORY 1436 : continueWrite(newSize); 1437 } 1438 1439 status_t Parcel::restartWrite(size_t desired) 1440 { 1441 if (mOwner) { 1442 freeData(); 1443 return continueWrite(desired); 1444 } 1445 1446 uint8_t* data = (uint8_t*)realloc(mData, desired); 1447 if (!data && desired > mDataCapacity) { 1448 mError = NO_MEMORY; 1449 return NO_MEMORY; 1450 } 1451 1452 releaseObjects(); 1453 1454 if (data) { 1455 mData = data; 1456 mDataCapacity = desired; 1457 } 1458 1459 mDataSize = mDataPos = 0; 1460 ALOGV("restartWrite Setting data size of %p to %d\n", this, mDataSize); 1461 ALOGV("restartWrite Setting data pos of %p to %d\n", this, mDataPos); 1462 1463 free(mObjects); 1464 mObjects = NULL; 1465 mObjectsSize = mObjectsCapacity = 0; 1466 mNextObjectHint = 0; 1467 mHasFds = false; 1468 mFdsKnown = true; 1469 mAllowFds = true; 1470 1471 return NO_ERROR; 1472 } 1473 1474 status_t Parcel::continueWrite(size_t desired) 1475 { 1476 // If shrinking, first adjust for any objects that appear 1477 // after the new data size. 1478 size_t objectsSize = mObjectsSize; 1479 if (desired < mDataSize) { 1480 if (desired == 0) { 1481 objectsSize = 0; 1482 } else { 1483 while (objectsSize > 0) { 1484 if (mObjects[objectsSize-1] < desired) 1485 break; 1486 objectsSize--; 1487 } 1488 } 1489 } 1490 1491 if (mOwner) { 1492 // If the size is going to zero, just release the owner's data. 1493 if (desired == 0) { 1494 freeData(); 1495 return NO_ERROR; 1496 } 1497 1498 // If there is a different owner, we need to take 1499 // posession. 1500 uint8_t* data = (uint8_t*)malloc(desired); 1501 if (!data) { 1502 mError = NO_MEMORY; 1503 return NO_MEMORY; 1504 } 1505 size_t* objects = NULL; 1506 1507 if (objectsSize) { 1508 objects = (size_t*)malloc(objectsSize*sizeof(size_t)); 1509 if (!objects) { 1510 free(data); 1511 1512 mError = NO_MEMORY; 1513 return NO_MEMORY; 1514 } 1515 1516 // Little hack to only acquire references on objects 1517 // we will be keeping. 1518 size_t oldObjectsSize = mObjectsSize; 1519 mObjectsSize = objectsSize; 1520 acquireObjects(); 1521 mObjectsSize = oldObjectsSize; 1522 } 1523 1524 if (mData) { 1525 memcpy(data, mData, mDataSize < desired ? mDataSize : desired); 1526 } 1527 if (objects && mObjects) { 1528 memcpy(objects, mObjects, objectsSize*sizeof(size_t)); 1529 } 1530 //ALOGI("Freeing data ref of %p (pid=%d)\n", this, getpid()); 1531 mOwner(this, mData, mDataSize, mObjects, mObjectsSize, mOwnerCookie); 1532 mOwner = NULL; 1533 1534 mData = data; 1535 mObjects = objects; 1536 mDataSize = (mDataSize < desired) ? mDataSize : desired; 1537 ALOGV("continueWrite Setting data size of %p to %d\n", this, mDataSize); 1538 mDataCapacity = desired; 1539 mObjectsSize = mObjectsCapacity = objectsSize; 1540 mNextObjectHint = 0; 1541 1542 } else if (mData) { 1543 if (objectsSize < mObjectsSize) { 1544 // Need to release refs on any objects we are dropping. 1545 const sp<ProcessState> proc(ProcessState::self()); 1546 for (size_t i=objectsSize; i<mObjectsSize; i++) { 1547 const flat_binder_object* flat 1548 = reinterpret_cast<flat_binder_object*>(mData+mObjects[i]); 1549 if (flat->type == BINDER_TYPE_FD) { 1550 // will need to rescan because we may have lopped off the only FDs 1551 mFdsKnown = false; 1552 } 1553 release_object(proc, *flat, this); 1554 } 1555 size_t* objects = 1556 (size_t*)realloc(mObjects, objectsSize*sizeof(size_t)); 1557 if (objects) { 1558 mObjects = objects; 1559 } 1560 mObjectsSize = objectsSize; 1561 mNextObjectHint = 0; 1562 } 1563 1564 // We own the data, so we can just do a realloc(). 1565 if (desired > mDataCapacity) { 1566 uint8_t* data = (uint8_t*)realloc(mData, desired); 1567 if (data) { 1568 mData = data; 1569 mDataCapacity = desired; 1570 } else if (desired > mDataCapacity) { 1571 mError = NO_MEMORY; 1572 return NO_MEMORY; 1573 } 1574 } else { 1575 if (mDataSize > desired) { 1576 mDataSize = desired; 1577 ALOGV("continueWrite Setting data size of %p to %d\n", this, mDataSize); 1578 } 1579 if (mDataPos > desired) { 1580 mDataPos = desired; 1581 ALOGV("continueWrite Setting data pos of %p to %d\n", this, mDataPos); 1582 } 1583 } 1584 1585 } else { 1586 // This is the first data. Easy! 1587 uint8_t* data = (uint8_t*)malloc(desired); 1588 if (!data) { 1589 mError = NO_MEMORY; 1590 return NO_MEMORY; 1591 } 1592 1593 if(!(mDataCapacity == 0 && mObjects == NULL 1594 && mObjectsCapacity == 0)) { 1595 ALOGE("continueWrite: %d/%p/%d/%d", mDataCapacity, mObjects, mObjectsCapacity, desired); 1596 } 1597 1598 mData = data; 1599 mDataSize = mDataPos = 0; 1600 ALOGV("continueWrite Setting data size of %p to %d\n", this, mDataSize); 1601 ALOGV("continueWrite Setting data pos of %p to %d\n", this, mDataPos); 1602 mDataCapacity = desired; 1603 } 1604 1605 return NO_ERROR; 1606 } 1607 1608 void Parcel::initState() 1609 { 1610 mError = NO_ERROR; 1611 mData = 0; 1612 mDataSize = 0; 1613 mDataCapacity = 0; 1614 mDataPos = 0; 1615 ALOGV("initState Setting data size of %p to %d\n", this, mDataSize); 1616 ALOGV("initState Setting data pos of %p to %d\n", this, mDataPos); 1617 mObjects = NULL; 1618 mObjectsSize = 0; 1619 mObjectsCapacity = 0; 1620 mNextObjectHint = 0; 1621 mHasFds = false; 1622 mFdsKnown = true; 1623 mAllowFds = true; 1624 mOwner = NULL; 1625 } 1626 1627 void Parcel::scanForFds() const 1628 { 1629 bool hasFds = false; 1630 for (size_t i=0; i<mObjectsSize; i++) { 1631 const flat_binder_object* flat 1632 = reinterpret_cast<const flat_binder_object*>(mData + mObjects[i]); 1633 if (flat->type == BINDER_TYPE_FD) { 1634 hasFds = true; 1635 break; 1636 } 1637 } 1638 mHasFds = hasFds; 1639 mFdsKnown = true; 1640 } 1641 1642 // --- Parcel::Blob --- 1643 1644 Parcel::Blob::Blob() : 1645 mMapped(false), mData(NULL), mSize(0) { 1646 } 1647 1648 Parcel::Blob::~Blob() { 1649 release(); 1650 } 1651 1652 void Parcel::Blob::release() { 1653 if (mMapped && mData) { 1654 ::munmap(mData, mSize); 1655 } 1656 clear(); 1657 } 1658 1659 void Parcel::Blob::init(bool mapped, void* data, size_t size) { 1660 mMapped = mapped; 1661 mData = data; 1662 mSize = size; 1663 } 1664 1665 void Parcel::Blob::clear() { 1666 mMapped = false; 1667 mData = NULL; 1668 mSize = 0; 1669 } 1670 1671 }; // namespace android 1672
