| /* |
| * Copyright (C) 2005 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #define LOG_TAG "Parcel" |
| //#define LOG_NDEBUG 0 |
| |
| #include <binder/Parcel.h> |
| |
| #include <binder/IPCThreadState.h> |
| #include <binder/Binder.h> |
| #include <binder/BpBinder.h> |
| #include <utils/Debug.h> |
| #include <binder/ProcessState.h> |
| #include <utils/Log.h> |
| #include <utils/String8.h> |
| #include <utils/String16.h> |
| #include <utils/TextOutput.h> |
| #include <utils/misc.h> |
| #include <utils/Flattenable.h> |
| #include <cutils/ashmem.h> |
| |
| #include <private/binder/binder_module.h> |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <stdint.h> |
| #include <sys/mman.h> |
| |
| #ifndef INT32_MAX |
| #define INT32_MAX ((int32_t)(2147483647)) |
| #endif |
| |
| #define LOG_REFS(...) |
| //#define LOG_REFS(...) ALOG(LOG_DEBUG, "Parcel", __VA_ARGS__) |
| |
| // --------------------------------------------------------------------------- |
| |
| #define PAD_SIZE(s) (((s)+3)&~3) |
| |
| // Note: must be kept in sync with android/os/StrictMode.java's PENALTY_GATHER |
| #define STRICT_MODE_PENALTY_GATHER 0x100 |
| |
| // Note: must be kept in sync with android/os/Parcel.java's EX_HAS_REPLY_HEADER |
| #define EX_HAS_REPLY_HEADER -128 |
| |
| // Maximum size of a blob to transfer in-place. |
| static const size_t IN_PLACE_BLOB_LIMIT = 40 * 1024; |
| |
| // XXX This can be made public if we want to provide |
| // support for typed data. |
| struct small_flat_data |
| { |
| uint32_t type; |
| uint32_t data; |
| }; |
| |
| namespace android { |
| |
| void acquire_object(const sp<ProcessState>& proc, |
| const flat_binder_object& obj, const void* who) |
| { |
| switch (obj.type) { |
| case BINDER_TYPE_BINDER: |
| if (obj.binder) { |
| LOG_REFS("Parcel %p acquiring reference on local %p", who, obj.cookie); |
| static_cast<IBinder*>(obj.cookie)->incStrong(who); |
| } |
| return; |
| case BINDER_TYPE_WEAK_BINDER: |
| if (obj.binder) |
| static_cast<RefBase::weakref_type*>(obj.binder)->incWeak(who); |
| return; |
| case BINDER_TYPE_HANDLE: { |
| const sp<IBinder> b = proc->getStrongProxyForHandle(obj.handle); |
| if (b != NULL) { |
| LOG_REFS("Parcel %p acquiring reference on remote %p", who, b.get()); |
| b->incStrong(who); |
| } |
| return; |
| } |
| case BINDER_TYPE_WEAK_HANDLE: { |
| const wp<IBinder> b = proc->getWeakProxyForHandle(obj.handle); |
| if (b != NULL) b.get_refs()->incWeak(who); |
| return; |
| } |
| case BINDER_TYPE_FD: { |
| // intentionally blank -- nothing to do to acquire this, but we do |
| // recognize it as a legitimate object type. |
| return; |
| } |
| } |
| |
| ALOGD("Invalid object type 0x%08lx", obj.type); |
| } |
| |
| void release_object(const sp<ProcessState>& proc, |
| const flat_binder_object& obj, const void* who) |
| { |
| switch (obj.type) { |
| case BINDER_TYPE_BINDER: |
| if (obj.binder) { |
| LOG_REFS("Parcel %p releasing reference on local %p", who, obj.cookie); |
| static_cast<IBinder*>(obj.cookie)->decStrong(who); |
| } |
| return; |
| case BINDER_TYPE_WEAK_BINDER: |
| if (obj.binder) |
| static_cast<RefBase::weakref_type*>(obj.binder)->decWeak(who); |
| return; |
| case BINDER_TYPE_HANDLE: { |
| const sp<IBinder> b = proc->getStrongProxyForHandle(obj.handle); |
| if (b != NULL) { |
| LOG_REFS("Parcel %p releasing reference on remote %p", who, b.get()); |
| b->decStrong(who); |
| } |
| return; |
| } |
| case BINDER_TYPE_WEAK_HANDLE: { |
| const wp<IBinder> b = proc->getWeakProxyForHandle(obj.handle); |
| if (b != NULL) b.get_refs()->decWeak(who); |
| return; |
| } |
| case BINDER_TYPE_FD: { |
| if (obj.cookie != (void*)0) close(obj.handle); |
| return; |
| } |
| } |
| |
| ALOGE("Invalid object type 0x%08lx", obj.type); |
| } |
| |
| inline static status_t finish_flatten_binder( |
| const sp<IBinder>& binder, const flat_binder_object& flat, Parcel* out) |
| { |
| return out->writeObject(flat, false); |
| } |
| |
| status_t flatten_binder(const sp<ProcessState>& proc, |
| const sp<IBinder>& binder, Parcel* out) |
| { |
| flat_binder_object obj; |
| |
| obj.flags = 0x7f | FLAT_BINDER_FLAG_ACCEPTS_FDS; |
| if (binder != NULL) { |
| IBinder *local = binder->localBinder(); |
| if (!local) { |
| BpBinder *proxy = binder->remoteBinder(); |
| if (proxy == NULL) { |
| ALOGE("null proxy"); |
| } |
| const int32_t handle = proxy ? proxy->handle() : 0; |
| obj.type = BINDER_TYPE_HANDLE; |
| obj.handle = handle; |
| obj.cookie = NULL; |
| } else { |
| obj.type = BINDER_TYPE_BINDER; |
| obj.binder = local->getWeakRefs(); |
| obj.cookie = local; |
| } |
| } else { |
| obj.type = BINDER_TYPE_BINDER; |
| obj.binder = NULL; |
| obj.cookie = NULL; |
| } |
| |
| return finish_flatten_binder(binder, obj, out); |
| } |
| |
| status_t flatten_binder(const sp<ProcessState>& proc, |
| const wp<IBinder>& binder, Parcel* out) |
| { |
| flat_binder_object obj; |
| |
| obj.flags = 0x7f | FLAT_BINDER_FLAG_ACCEPTS_FDS; |
| if (binder != NULL) { |
| sp<IBinder> real = binder.promote(); |
| if (real != NULL) { |
| IBinder *local = real->localBinder(); |
| if (!local) { |
| BpBinder *proxy = real->remoteBinder(); |
| if (proxy == NULL) { |
| ALOGE("null proxy"); |
| } |
| const int32_t handle = proxy ? proxy->handle() : 0; |
| obj.type = BINDER_TYPE_WEAK_HANDLE; |
| obj.handle = handle; |
| obj.cookie = NULL; |
| } else { |
| obj.type = BINDER_TYPE_WEAK_BINDER; |
| obj.binder = binder.get_refs(); |
| obj.cookie = binder.unsafe_get(); |
| } |
| return finish_flatten_binder(real, obj, out); |
| } |
| |
| // XXX How to deal? In order to flatten the given binder, |
| // we need to probe it for information, which requires a primary |
| // reference... but we don't have one. |
| // |
| // The OpenBinder implementation uses a dynamic_cast<> here, |
| // but we can't do that with the different reference counting |
| // implementation we are using. |
| ALOGE("Unable to unflatten Binder weak reference!"); |
| obj.type = BINDER_TYPE_BINDER; |
| obj.binder = NULL; |
| obj.cookie = NULL; |
| return finish_flatten_binder(NULL, obj, out); |
| |
| } else { |
| obj.type = BINDER_TYPE_BINDER; |
| obj.binder = NULL; |
| obj.cookie = NULL; |
| return finish_flatten_binder(NULL, obj, out); |
| } |
| } |
| |
| inline static status_t finish_unflatten_binder( |
| BpBinder* proxy, const flat_binder_object& flat, const Parcel& in) |
| { |
| return NO_ERROR; |
| } |
| |
| status_t unflatten_binder(const sp<ProcessState>& proc, |
| const Parcel& in, sp<IBinder>* out) |
| { |
| const flat_binder_object* flat = in.readObject(false); |
| |
| if (flat) { |
| switch (flat->type) { |
| case BINDER_TYPE_BINDER: |
| *out = static_cast<IBinder*>(flat->cookie); |
| return finish_unflatten_binder(NULL, *flat, in); |
| case BINDER_TYPE_HANDLE: |
| *out = proc->getStrongProxyForHandle(flat->handle); |
| return finish_unflatten_binder( |
| static_cast<BpBinder*>(out->get()), *flat, in); |
| } |
| } |
| return BAD_TYPE; |
| } |
| |
| status_t unflatten_binder(const sp<ProcessState>& proc, |
| const Parcel& in, wp<IBinder>* out) |
| { |
| const flat_binder_object* flat = in.readObject(false); |
| |
| if (flat) { |
| switch (flat->type) { |
| case BINDER_TYPE_BINDER: |
| *out = static_cast<IBinder*>(flat->cookie); |
| return finish_unflatten_binder(NULL, *flat, in); |
| case BINDER_TYPE_WEAK_BINDER: |
| if (flat->binder != NULL) { |
| out->set_object_and_refs( |
| static_cast<IBinder*>(flat->cookie), |
| static_cast<RefBase::weakref_type*>(flat->binder)); |
| } else { |
| *out = NULL; |
| } |
| return finish_unflatten_binder(NULL, *flat, in); |
| case BINDER_TYPE_HANDLE: |
| case BINDER_TYPE_WEAK_HANDLE: |
| *out = proc->getWeakProxyForHandle(flat->handle); |
| return finish_unflatten_binder( |
| static_cast<BpBinder*>(out->unsafe_get()), *flat, in); |
| } |
| } |
| return BAD_TYPE; |
| } |
| |
| // --------------------------------------------------------------------------- |
| |
| Parcel::Parcel() |
| { |
| initState(); |
| } |
| |
| Parcel::~Parcel() |
| { |
| freeDataNoInit(); |
| } |
| |
| const uint8_t* Parcel::data() const |
| { |
| return mData; |
| } |
| |
| size_t Parcel::dataSize() const |
| { |
| return (mDataSize > mDataPos ? mDataSize : mDataPos); |
| } |
| |
| size_t Parcel::dataAvail() const |
| { |
| // TODO: decide what to do about the possibility that this can |
| // report an available-data size that exceeds a Java int's max |
| // positive value, causing havoc. Fortunately this will only |
| // happen if someone constructs a Parcel containing more than two |
| // gigabytes of data, which on typical phone hardware is simply |
| // not possible. |
| return dataSize() - dataPosition(); |
| } |
| |
| size_t Parcel::dataPosition() const |
| { |
| return mDataPos; |
| } |
| |
| size_t Parcel::dataCapacity() const |
| { |
| return mDataCapacity; |
| } |
| |
| status_t Parcel::setDataSize(size_t size) |
| { |
| status_t err; |
| err = continueWrite(size); |
| if (err == NO_ERROR) { |
| mDataSize = size; |
| ALOGV("setDataSize Setting data size of %p to %d\n", this, mDataSize); |
| } |
| return err; |
| } |
| |
| void Parcel::setDataPosition(size_t pos) const |
| { |
| mDataPos = pos; |
| mNextObjectHint = 0; |
| } |
| |
| status_t Parcel::setDataCapacity(size_t size) |
| { |
| if (size > mDataCapacity) return continueWrite(size); |
| return NO_ERROR; |
| } |
| |
| status_t Parcel::setData(const uint8_t* buffer, size_t len) |
| { |
| status_t err = restartWrite(len); |
| if (err == NO_ERROR) { |
| memcpy(const_cast<uint8_t*>(data()), buffer, len); |
| mDataSize = len; |
| mFdsKnown = false; |
| } |
| return err; |
| } |
| |
| status_t Parcel::appendFrom(const Parcel *parcel, size_t offset, size_t len) |
| { |
| const sp<ProcessState> proc(ProcessState::self()); |
| status_t err; |
| const uint8_t *data = parcel->mData; |
| const size_t *objects = parcel->mObjects; |
| size_t size = parcel->mObjectsSize; |
| int startPos = mDataPos; |
| int firstIndex = -1, lastIndex = -2; |
| |
| if (len == 0) { |
| return NO_ERROR; |
| } |
| |
| // range checks against the source parcel size |
| if ((offset > parcel->mDataSize) |
| || (len > parcel->mDataSize) |
| || (offset + len > parcel->mDataSize)) { |
| return BAD_VALUE; |
| } |
| |
| // Count objects in range |
| for (int i = 0; i < (int) size; i++) { |
| size_t off = objects[i]; |
| if ((off >= offset) && (off < offset + len)) { |
| if (firstIndex == -1) { |
| firstIndex = i; |
| } |
| lastIndex = i; |
| } |
| } |
| int numObjects = lastIndex - firstIndex + 1; |
| |
| if ((mDataSize+len) > mDataCapacity) { |
| // grow data |
| err = growData(len); |
| if (err != NO_ERROR) { |
| return err; |
| } |
| } |
| |
| // append data |
| memcpy(mData + mDataPos, data + offset, len); |
| mDataPos += len; |
| mDataSize += len; |
| |
| err = NO_ERROR; |
| |
| if (numObjects > 0) { |
| // grow objects |
| if (mObjectsCapacity < mObjectsSize + numObjects) { |
| int newSize = ((mObjectsSize + numObjects)*3)/2; |
| size_t *objects = |
| (size_t*)realloc(mObjects, newSize*sizeof(size_t)); |
| if (objects == (size_t*)0) { |
| return NO_MEMORY; |
| } |
| mObjects = objects; |
| mObjectsCapacity = newSize; |
| } |
| |
| // append and acquire objects |
| int idx = mObjectsSize; |
| for (int i = firstIndex; i <= lastIndex; i++) { |
| size_t off = objects[i] - offset + startPos; |
| mObjects[idx++] = off; |
| mObjectsSize++; |
| |
| flat_binder_object* flat |
| = reinterpret_cast<flat_binder_object*>(mData + off); |
| acquire_object(proc, *flat, this); |
| |
| if (flat->type == BINDER_TYPE_FD) { |
| // If this is a file descriptor, we need to dup it so the |
| // new Parcel now owns its own fd, and can declare that we |
| // officially know we have fds. |
| flat->handle = dup(flat->handle); |
| flat->cookie = (void*)1; |
| mHasFds = mFdsKnown = true; |
| if (!mAllowFds) { |
| err = FDS_NOT_ALLOWED; |
| } |
| } |
| } |
| } |
| |
| return err; |
| } |
| |
| bool Parcel::pushAllowFds(bool allowFds) |
| { |
| const bool origValue = mAllowFds; |
| if (!allowFds) { |
| mAllowFds = false; |
| } |
| return origValue; |
| } |
| |
| void Parcel::restoreAllowFds(bool lastValue) |
| { |
| mAllowFds = lastValue; |
| } |
| |
| bool Parcel::hasFileDescriptors() const |
| { |
| if (!mFdsKnown) { |
| scanForFds(); |
| } |
| return mHasFds; |
| } |
| |
| // Write RPC headers. (previously just the interface token) |
| status_t Parcel::writeInterfaceToken(const String16& interface) |
| { |
| writeInt32(IPCThreadState::self()->getStrictModePolicy() | |
| STRICT_MODE_PENALTY_GATHER); |
| // currently the interface identification token is just its name as a string |
| return writeString16(interface); |
| } |
| |
| bool Parcel::checkInterface(IBinder* binder) const |
| { |
| return enforceInterface(binder->getInterfaceDescriptor()); |
| } |
| |
| bool Parcel::enforceInterface(const String16& interface, |
| IPCThreadState* threadState) const |
| { |
| int32_t strictPolicy = readInt32(); |
| if (threadState == NULL) { |
| threadState = IPCThreadState::self(); |
| } |
| if ((threadState->getLastTransactionBinderFlags() & |
| IBinder::FLAG_ONEWAY) != 0) { |
| // For one-way calls, the callee is running entirely |
| // disconnected from the caller, so disable StrictMode entirely. |
| // Not only does disk/network usage not impact the caller, but |
| // there's no way to commuicate back any violations anyway. |
| threadState->setStrictModePolicy(0); |
| } else { |
| threadState->setStrictModePolicy(strictPolicy); |
| } |
| const String16 str(readString16()); |
| if (str == interface) { |
| return true; |
| } else { |
| ALOGW("**** enforceInterface() expected '%s' but read '%s'\n", |
| String8(interface).string(), String8(str).string()); |
| return false; |
| } |
| } |
| |
| const size_t* Parcel::objects() const |
| { |
| return mObjects; |
| } |
| |
| size_t Parcel::objectsCount() const |
| { |
| return mObjectsSize; |
| } |
| |
| status_t Parcel::errorCheck() const |
| { |
| return mError; |
| } |
| |
| void Parcel::setError(status_t err) |
| { |
| mError = err; |
| } |
| |
| status_t Parcel::finishWrite(size_t len) |
| { |
| //printf("Finish write of %d\n", len); |
| mDataPos += len; |
| ALOGV("finishWrite Setting data pos of %p to %d\n", this, mDataPos); |
| if (mDataPos > mDataSize) { |
| mDataSize = mDataPos; |
| ALOGV("finishWrite Setting data size of %p to %d\n", this, mDataSize); |
| } |
| //printf("New pos=%d, size=%d\n", mDataPos, mDataSize); |
| return NO_ERROR; |
| } |
| |
| status_t Parcel::writeUnpadded(const void* data, size_t len) |
| { |
| size_t end = mDataPos + len; |
| if (end < mDataPos) { |
| // integer overflow |
| return BAD_VALUE; |
| } |
| |
| if (end <= mDataCapacity) { |
| restart_write: |
| memcpy(mData+mDataPos, data, len); |
| return finishWrite(len); |
| } |
| |
| status_t err = growData(len); |
| if (err == NO_ERROR) goto restart_write; |
| return err; |
| } |
| |
| status_t Parcel::write(const void* data, size_t len) |
| { |
| void* const d = writeInplace(len); |
| if (d) { |
| memcpy(d, data, len); |
| return NO_ERROR; |
| } |
| return mError; |
| } |
| |
| void* Parcel::writeInplace(size_t len) |
| { |
| const size_t padded = PAD_SIZE(len); |
| |
| // sanity check for integer overflow |
| if (mDataPos+padded < mDataPos) { |
| return NULL; |
| } |
| |
| if ((mDataPos+padded) <= mDataCapacity) { |
| restart_write: |
| //printf("Writing %ld bytes, padded to %ld\n", len, padded); |
| uint8_t* const data = mData+mDataPos; |
| |
| // Need to pad at end? |
| if (padded != len) { |
| #if BYTE_ORDER == BIG_ENDIAN |
| static const uint32_t mask[4] = { |
| 0x00000000, 0xffffff00, 0xffff0000, 0xff000000 |
| }; |
| #endif |
| #if BYTE_ORDER == LITTLE_ENDIAN |
| static const uint32_t mask[4] = { |
| 0x00000000, 0x00ffffff, 0x0000ffff, 0x000000ff |
| }; |
| #endif |
| //printf("Applying pad mask: %p to %p\n", (void*)mask[padded-len], |
| // *reinterpret_cast<void**>(data+padded-4)); |
| *reinterpret_cast<uint32_t*>(data+padded-4) &= mask[padded-len]; |
| } |
| |
| finishWrite(padded); |
| return data; |
| } |
| |
| status_t err = growData(padded); |
| if (err == NO_ERROR) goto restart_write; |
| return NULL; |
| } |
| |
| status_t Parcel::writeInt32(int32_t val) |
| { |
| return writeAligned(val); |
| } |
| |
| status_t Parcel::writeInt64(int64_t val) |
| { |
| return writeAligned(val); |
| } |
| |
| status_t Parcel::writeFloat(float val) |
| { |
| return writeAligned(val); |
| } |
| |
| #if defined(__mips__) && defined(__mips_hard_float) |
| |
| status_t Parcel::writeDouble(double val) |
| { |
| union { |
| double d; |
| unsigned long long ll; |
| } u; |
| u.d = val; |
| return writeAligned(u.ll); |
| } |
| |
| #else |
| |
| status_t Parcel::writeDouble(double val) |
| { |
| return writeAligned(val); |
| } |
| |
| #endif |
| |
| status_t Parcel::writeIntPtr(intptr_t val) |
| { |
| return writeAligned(val); |
| } |
| |
| status_t Parcel::writeCString(const char* str) |
| { |
| return write(str, strlen(str)+1); |
| } |
| |
| status_t Parcel::writeString8(const String8& str) |
| { |
| status_t err = writeInt32(str.bytes()); |
| // only write string if its length is more than zero characters, |
| // as readString8 will only read if the length field is non-zero. |
| // this is slightly different from how writeString16 works. |
| if (str.bytes() > 0 && err == NO_ERROR) { |
| err = write(str.string(), str.bytes()+1); |
| } |
| return err; |
| } |
| |
| status_t Parcel::writeString16(const String16& str) |
| { |
| return writeString16(str.string(), str.size()); |
| } |
| |
| status_t Parcel::writeString16(const char16_t* str, size_t len) |
| { |
| if (str == NULL) return writeInt32(-1); |
| |
| status_t err = writeInt32(len); |
| if (err == NO_ERROR) { |
| len *= sizeof(char16_t); |
| uint8_t* data = (uint8_t*)writeInplace(len+sizeof(char16_t)); |
| if (data) { |
| memcpy(data, str, len); |
| *reinterpret_cast<char16_t*>(data+len) = 0; |
| return NO_ERROR; |
| } |
| err = mError; |
| } |
| return err; |
| } |
| |
| status_t Parcel::writeStrongBinder(const sp<IBinder>& val) |
| { |
| return flatten_binder(ProcessState::self(), val, this); |
| } |
| |
| status_t Parcel::writeWeakBinder(const wp<IBinder>& val) |
| { |
| return flatten_binder(ProcessState::self(), val, this); |
| } |
| |
| status_t Parcel::writeNativeHandle(const native_handle* handle) |
| { |
| if (!handle || handle->version != sizeof(native_handle)) |
| return BAD_TYPE; |
| |
| status_t err; |
| err = writeInt32(handle->numFds); |
| if (err != NO_ERROR) return err; |
| |
| err = writeInt32(handle->numInts); |
| if (err != NO_ERROR) return err; |
| |
| for (int i=0 ; err==NO_ERROR && i<handle->numFds ; i++) |
| err = writeDupFileDescriptor(handle->data[i]); |
| |
| if (err != NO_ERROR) { |
| ALOGD("write native handle, write dup fd failed"); |
| return err; |
| } |
| err = write(handle->data + handle->numFds, sizeof(int)*handle->numInts); |
| return err; |
| } |
| |
| status_t Parcel::writeFileDescriptor(int fd, bool takeOwnership) |
| { |
| flat_binder_object obj; |
| obj.type = BINDER_TYPE_FD; |
| obj.flags = 0x7f | FLAT_BINDER_FLAG_ACCEPTS_FDS; |
| obj.handle = fd; |
| obj.cookie = (void*) (takeOwnership ? 1 : 0); |
| return writeObject(obj, true); |
| } |
| |
| status_t Parcel::writeDupFileDescriptor(int fd) |
| { |
| int dupFd = dup(fd); |
| if (dupFd < 0) { |
| return -errno; |
| } |
| status_t err = writeFileDescriptor(dupFd, true /*takeOwnership*/); |
| if (err) { |
| close(dupFd); |
| } |
| return err; |
| } |
| |
| status_t Parcel::writeBlob(size_t len, WritableBlob* outBlob) |
| { |
| status_t status; |
| |
| if (!mAllowFds || len <= IN_PLACE_BLOB_LIMIT) { |
| ALOGV("writeBlob: write in place"); |
| status = writeInt32(0); |
| if (status) return status; |
| |
| void* ptr = writeInplace(len); |
| if (!ptr) return NO_MEMORY; |
| |
| outBlob->init(false /*mapped*/, ptr, len); |
| return NO_ERROR; |
| } |
| |
| ALOGV("writeBlob: write to ashmem"); |
| int fd = ashmem_create_region("Parcel Blob", len); |
| if (fd < 0) return NO_MEMORY; |
| |
| int result = ashmem_set_prot_region(fd, PROT_READ | PROT_WRITE); |
| if (result < 0) { |
| status = result; |
| } else { |
| void* ptr = ::mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); |
| if (ptr == MAP_FAILED) { |
| status = -errno; |
| } else { |
| result = ashmem_set_prot_region(fd, PROT_READ); |
| if (result < 0) { |
| status = result; |
| } else { |
| status = writeInt32(1); |
| if (!status) { |
| status = writeFileDescriptor(fd, true /*takeOwnership*/); |
| if (!status) { |
| outBlob->init(true /*mapped*/, ptr, len); |
| return NO_ERROR; |
| } |
| } |
| } |
| } |
| ::munmap(ptr, len); |
| } |
| ::close(fd); |
| return status; |
| } |
| |
| status_t Parcel::write(const Flattenable& val) |
| { |
| status_t err; |
| |
| // size if needed |
| size_t len = val.getFlattenedSize(); |
| size_t fd_count = val.getFdCount(); |
| |
| err = this->writeInt32(len); |
| if (err) return err; |
| |
| err = this->writeInt32(fd_count); |
| if (err) return err; |
| |
| // payload |
| void* buf = this->writeInplace(PAD_SIZE(len)); |
| if (buf == NULL) |
| return BAD_VALUE; |
| |
| int* fds = NULL; |
| if (fd_count) { |
| fds = new int[fd_count]; |
| } |
| |
| err = val.flatten(buf, len, fds, fd_count); |
| for (size_t i=0 ; i<fd_count && err==NO_ERROR ; i++) { |
| err = this->writeDupFileDescriptor( fds[i] ); |
| } |
| |
| if (fd_count) { |
| delete [] fds; |
| } |
| |
| return err; |
| } |
| |
| status_t Parcel::writeObject(const flat_binder_object& val, bool nullMetaData) |
| { |
| const bool enoughData = (mDataPos+sizeof(val)) <= mDataCapacity; |
| const bool enoughObjects = mObjectsSize < mObjectsCapacity; |
| if (enoughData && enoughObjects) { |
| restart_write: |
| *reinterpret_cast<flat_binder_object*>(mData+mDataPos) = val; |
| |
| // Need to write meta-data? |
| if (nullMetaData || val.binder != NULL) { |
| mObjects[mObjectsSize] = mDataPos; |
| acquire_object(ProcessState::self(), val, this); |
| mObjectsSize++; |
| } |
| |
| // remember if it's a file descriptor |
| if (val.type == BINDER_TYPE_FD) { |
| if (!mAllowFds) { |
| return FDS_NOT_ALLOWED; |
| } |
| mHasFds = mFdsKnown = true; |
| } |
| |
| return finishWrite(sizeof(flat_binder_object)); |
| } |
| |
| if (!enoughData) { |
| const status_t err = growData(sizeof(val)); |
| if (err != NO_ERROR) return err; |
| } |
| if (!enoughObjects) { |
| size_t newSize = ((mObjectsSize+2)*3)/2; |
| size_t* objects = (size_t*)realloc(mObjects, newSize*sizeof(size_t)); |
| if (objects == NULL) return NO_MEMORY; |
| mObjects = objects; |
| mObjectsCapacity = newSize; |
| } |
| |
| goto restart_write; |
| } |
| |
| status_t Parcel::writeNoException() |
| { |
| return writeInt32(0); |
| } |
| |
| void Parcel::remove(size_t start, size_t amt) |
| { |
| LOG_ALWAYS_FATAL("Parcel::remove() not yet implemented!"); |
| } |
| |
| status_t Parcel::read(void* outData, size_t len) const |
| { |
| if ((mDataPos+PAD_SIZE(len)) >= mDataPos && (mDataPos+PAD_SIZE(len)) <= mDataSize) { |
| memcpy(outData, mData+mDataPos, len); |
| mDataPos += PAD_SIZE(len); |
| ALOGV("read Setting data pos of %p to %d\n", this, mDataPos); |
| return NO_ERROR; |
| } |
| return NOT_ENOUGH_DATA; |
| } |
| |
| const void* Parcel::readInplace(size_t len) const |
| { |
| if ((mDataPos+PAD_SIZE(len)) >= mDataPos && (mDataPos+PAD_SIZE(len)) <= mDataSize) { |
| const void* data = mData+mDataPos; |
| mDataPos += PAD_SIZE(len); |
| ALOGV("readInplace Setting data pos of %p to %d\n", this, mDataPos); |
| return data; |
| } |
| return NULL; |
| } |
| |
| template<class T> |
| status_t Parcel::readAligned(T *pArg) const { |
| COMPILE_TIME_ASSERT_FUNCTION_SCOPE(PAD_SIZE(sizeof(T)) == sizeof(T)); |
| |
| if ((mDataPos+sizeof(T)) <= mDataSize) { |
| const void* data = mData+mDataPos; |
| mDataPos += sizeof(T); |
| *pArg = *reinterpret_cast<const T*>(data); |
| return NO_ERROR; |
| } else { |
| return NOT_ENOUGH_DATA; |
| } |
| } |
| |
| template<class T> |
| T Parcel::readAligned() const { |
| T result; |
| if (readAligned(&result) != NO_ERROR) { |
| result = 0; |
| } |
| |
| return result; |
| } |
| |
| template<class T> |
| status_t Parcel::writeAligned(T val) { |
| COMPILE_TIME_ASSERT_FUNCTION_SCOPE(PAD_SIZE(sizeof(T)) == sizeof(T)); |
| |
| if ((mDataPos+sizeof(val)) <= mDataCapacity) { |
| restart_write: |
| *reinterpret_cast<T*>(mData+mDataPos) = val; |
| return finishWrite(sizeof(val)); |
| } |
| |
| status_t err = growData(sizeof(val)); |
| if (err == NO_ERROR) goto restart_write; |
| return err; |
| } |
| |
| status_t Parcel::readInt32(int32_t *pArg) const |
| { |
| return readAligned(pArg); |
| } |
| |
| int32_t Parcel::readInt32() const |
| { |
| return readAligned<int32_t>(); |
| } |
| |
| |
| status_t Parcel::readInt64(int64_t *pArg) const |
| { |
| return readAligned(pArg); |
| } |
| |
| |
| int64_t Parcel::readInt64() const |
| { |
| return readAligned<int64_t>(); |
| } |
| |
| status_t Parcel::readFloat(float *pArg) const |
| { |
| return readAligned(pArg); |
| } |
| |
| |
| float Parcel::readFloat() const |
| { |
| return readAligned<float>(); |
| } |
| |
| #if defined(__mips__) && defined(__mips_hard_float) |
| |
| status_t Parcel::readDouble(double *pArg) const |
| { |
| union { |
| double d; |
| unsigned long long ll; |
| } u; |
| status_t status; |
| status = readAligned(&u.ll); |
| *pArg = u.d; |
| return status; |
| } |
| |
| double Parcel::readDouble() const |
| { |
| union { |
| double d; |
| unsigned long long ll; |
| } u; |
| u.ll = readAligned<unsigned long long>(); |
| return u.d; |
| } |
| |
| #else |
| |
| status_t Parcel::readDouble(double *pArg) const |
| { |
| return readAligned(pArg); |
| } |
| |
| double Parcel::readDouble() const |
| { |
| return readAligned<double>(); |
| } |
| |
| #endif |
| |
| status_t Parcel::readIntPtr(intptr_t *pArg) const |
| { |
| return readAligned(pArg); |
| } |
| |
| |
| intptr_t Parcel::readIntPtr() const |
| { |
| return readAligned<intptr_t>(); |
| } |
| |
| |
| const char* Parcel::readCString() const |
| { |
| const size_t avail = mDataSize-mDataPos; |
| if (avail > 0) { |
| const char* str = reinterpret_cast<const char*>(mData+mDataPos); |
| // is the string's trailing NUL within the parcel's valid bounds? |
| const char* eos = reinterpret_cast<const char*>(memchr(str, 0, avail)); |
| if (eos) { |
| const size_t len = eos - str; |
| mDataPos += PAD_SIZE(len+1); |
| ALOGV("readCString Setting data pos of %p to %d\n", this, mDataPos); |
| return str; |
| } |
| } |
| return NULL; |
| } |
| |
| String8 Parcel::readString8() const |
| { |
| int32_t size = readInt32(); |
| // watch for potential int overflow adding 1 for trailing NUL |
| if (size > 0 && size < INT32_MAX) { |
| const char* str = (const char*)readInplace(size+1); |
| if (str) return String8(str, size); |
| } |
| return String8(); |
| } |
| |
| String16 Parcel::readString16() const |
| { |
| size_t len; |
| const char16_t* str = readString16Inplace(&len); |
| if (str) return String16(str, len); |
| ALOGE("Reading a NULL string not supported here."); |
| return String16(); |
| } |
| |
| const char16_t* Parcel::readString16Inplace(size_t* outLen) const |
| { |
| int32_t size = readInt32(); |
| // watch for potential int overflow from size+1 |
| if (size >= 0 && size < INT32_MAX) { |
| *outLen = size; |
| const char16_t* str = (const char16_t*)readInplace((size+1)*sizeof(char16_t)); |
| if (str != NULL) { |
| return str; |
| } |
| } |
| *outLen = 0; |
| return NULL; |
| } |
| |
| sp<IBinder> Parcel::readStrongBinder() const |
| { |
| sp<IBinder> val; |
| unflatten_binder(ProcessState::self(), *this, &val); |
| return val; |
| } |
| |
| wp<IBinder> Parcel::readWeakBinder() const |
| { |
| wp<IBinder> val; |
| unflatten_binder(ProcessState::self(), *this, &val); |
| return val; |
| } |
| |
| int32_t Parcel::readExceptionCode() const |
| { |
| int32_t exception_code = readAligned<int32_t>(); |
| if (exception_code == EX_HAS_REPLY_HEADER) { |
| int32_t header_start = dataPosition(); |
| int32_t header_size = readAligned<int32_t>(); |
| // Skip over fat responses headers. Not used (or propagated) in |
| // native code |
| setDataPosition(header_start + header_size); |
| // And fat response headers are currently only used when there are no |
| // exceptions, so return no error: |
| return 0; |
| } |
| return exception_code; |
| } |
| |
| native_handle* Parcel::readNativeHandle() const |
| { |
| int numFds, numInts; |
| status_t err; |
| err = readInt32(&numFds); |
| if (err != NO_ERROR) return 0; |
| err = readInt32(&numInts); |
| if (err != NO_ERROR) return 0; |
| |
| native_handle* h = native_handle_create(numFds, numInts); |
| for (int i=0 ; err==NO_ERROR && i<numFds ; i++) { |
| h->data[i] = dup(readFileDescriptor()); |
| if (h->data[i] < 0) err = BAD_VALUE; |
| } |
| err = read(h->data + numFds, sizeof(int)*numInts); |
| if (err != NO_ERROR) { |
| native_handle_close(h); |
| native_handle_delete(h); |
| h = 0; |
| } |
| return h; |
| } |
| |
| |
| int Parcel::readFileDescriptor() const |
| { |
| const flat_binder_object* flat = readObject(true); |
| if (flat) { |
| switch (flat->type) { |
| case BINDER_TYPE_FD: |
| //ALOGI("Returning file descriptor %ld from parcel %p\n", flat->handle, this); |
| return flat->handle; |
| } |
| } |
| return BAD_TYPE; |
| } |
| |
| status_t Parcel::readBlob(size_t len, ReadableBlob* outBlob) const |
| { |
| int32_t useAshmem; |
| status_t status = readInt32(&useAshmem); |
| if (status) return status; |
| |
| if (!useAshmem) { |
| ALOGV("readBlob: read in place"); |
| const void* ptr = readInplace(len); |
| if (!ptr) return BAD_VALUE; |
| |
| outBlob->init(false /*mapped*/, const_cast<void*>(ptr), len); |
| return NO_ERROR; |
| } |
| |
| ALOGV("readBlob: read from ashmem"); |
| int fd = readFileDescriptor(); |
| if (fd == int(BAD_TYPE)) return BAD_VALUE; |
| |
| void* ptr = ::mmap(NULL, len, PROT_READ, MAP_SHARED, fd, 0); |
| if (!ptr) return NO_MEMORY; |
| |
| outBlob->init(true /*mapped*/, ptr, len); |
| return NO_ERROR; |
| } |
| |
| status_t Parcel::read(Flattenable& val) const |
| { |
| // size |
| const size_t len = this->readInt32(); |
| const size_t fd_count = this->readInt32(); |
| |
| // payload |
| void const* buf = this->readInplace(PAD_SIZE(len)); |
| if (buf == NULL) |
| return BAD_VALUE; |
| |
| int* fds = NULL; |
| if (fd_count) { |
| fds = new int[fd_count]; |
| } |
| |
| status_t err = NO_ERROR; |
| for (size_t i=0 ; i<fd_count && err==NO_ERROR ; i++) { |
| fds[i] = dup(this->readFileDescriptor()); |
| if (fds[i] < 0) err = BAD_VALUE; |
| } |
| |
| if (err == NO_ERROR) { |
| err = val.unflatten(buf, len, fds, fd_count); |
| } |
| |
| if (fd_count) { |
| delete [] fds; |
| } |
| |
| return err; |
| } |
| const flat_binder_object* Parcel::readObject(bool nullMetaData) const |
| { |
| const size_t DPOS = mDataPos; |
| if ((DPOS+sizeof(flat_binder_object)) <= mDataSize) { |
| const flat_binder_object* obj |
| = reinterpret_cast<const flat_binder_object*>(mData+DPOS); |
| mDataPos = DPOS + sizeof(flat_binder_object); |
| if (!nullMetaData && (obj->cookie == NULL && obj->binder == NULL)) { |
| // When transferring a NULL object, we don't write it into |
| // the object list, so we don't want to check for it when |
| // reading. |
| ALOGV("readObject Setting data pos of %p to %d\n", this, mDataPos); |
| return obj; |
| } |
| |
| // Ensure that this object is valid... |
| size_t* const OBJS = mObjects; |
| const size_t N = mObjectsSize; |
| size_t opos = mNextObjectHint; |
| |
| if (N > 0) { |
| ALOGV("Parcel %p looking for obj at %d, hint=%d\n", |
| this, DPOS, opos); |
| |
| // Start at the current hint position, looking for an object at |
| // the current data position. |
| if (opos < N) { |
| while (opos < (N-1) && OBJS[opos] < DPOS) { |
| opos++; |
| } |
| } else { |
| opos = N-1; |
| } |
| if (OBJS[opos] == DPOS) { |
| // Found it! |
| ALOGV("Parcel found obj %d at index %d with forward search", |
| this, DPOS, opos); |
| mNextObjectHint = opos+1; |
| ALOGV("readObject Setting data pos of %p to %d\n", this, mDataPos); |
| return obj; |
| } |
| |
| // Look backwards for it... |
| while (opos > 0 && OBJS[opos] > DPOS) { |
| opos--; |
| } |
| if (OBJS[opos] == DPOS) { |
| // Found it! |
| ALOGV("Parcel found obj %d at index %d with backward search", |
| this, DPOS, opos); |
| mNextObjectHint = opos+1; |
| ALOGV("readObject Setting data pos of %p to %d\n", this, mDataPos); |
| return obj; |
| } |
| } |
| ALOGW("Attempt to read object from Parcel %p at offset %d that is not in the object list", |
| this, DPOS); |
| } |
| return NULL; |
| } |
| |
| void Parcel::closeFileDescriptors() |
| { |
| size_t i = mObjectsSize; |
| if (i > 0) { |
| //ALOGI("Closing file descriptors for %d objects...", mObjectsSize); |
| } |
| while (i > 0) { |
| i--; |
| const flat_binder_object* flat |
| = reinterpret_cast<flat_binder_object*>(mData+mObjects[i]); |
| if (flat->type == BINDER_TYPE_FD) { |
| //ALOGI("Closing fd: %ld\n", flat->handle); |
| close(flat->handle); |
| } |
| } |
| } |
| |
| const uint8_t* Parcel::ipcData() const |
| { |
| return mData; |
| } |
| |
| size_t Parcel::ipcDataSize() const |
| { |
| return (mDataSize > mDataPos ? mDataSize : mDataPos); |
| } |
| |
| const size_t* Parcel::ipcObjects() const |
| { |
| return mObjects; |
| } |
| |
| size_t Parcel::ipcObjectsCount() const |
| { |
| return mObjectsSize; |
| } |
| |
| void Parcel::ipcSetDataReference(const uint8_t* data, size_t dataSize, |
| const size_t* objects, size_t objectsCount, release_func relFunc, void* relCookie) |
| { |
| freeDataNoInit(); |
| mError = NO_ERROR; |
| mData = const_cast<uint8_t*>(data); |
| mDataSize = mDataCapacity = dataSize; |
| //ALOGI("setDataReference Setting data size of %p to %lu (pid=%d)\n", this, mDataSize, getpid()); |
| mDataPos = 0; |
| ALOGV("setDataReference Setting data pos of %p to %d\n", this, mDataPos); |
| mObjects = const_cast<size_t*>(objects); |
| mObjectsSize = mObjectsCapacity = objectsCount; |
| mNextObjectHint = 0; |
| mOwner = relFunc; |
| mOwnerCookie = relCookie; |
| scanForFds(); |
| } |
| |
| void Parcel::print(TextOutput& to, uint32_t flags) const |
| { |
| to << "Parcel("; |
| |
| if (errorCheck() != NO_ERROR) { |
| const status_t err = errorCheck(); |
| to << "Error: " << (void*)err << " \"" << strerror(-err) << "\""; |
| } else if (dataSize() > 0) { |
| const uint8_t* DATA = data(); |
| to << indent << HexDump(DATA, dataSize()) << dedent; |
| const size_t* OBJS = objects(); |
| const size_t N = objectsCount(); |
| for (size_t i=0; i<N; i++) { |
| const flat_binder_object* flat |
| = reinterpret_cast<const flat_binder_object*>(DATA+OBJS[i]); |
| to << endl << "Object #" << i << " @ " << (void*)OBJS[i] << ": " |
| << TypeCode(flat->type & 0x7f7f7f00) |
| << " = " << flat->binder; |
| } |
| } else { |
| to << "NULL"; |
| } |
| |
| to << ")"; |
| } |
| |
| void Parcel::releaseObjects() |
| { |
| const sp<ProcessState> proc(ProcessState::self()); |
| size_t i = mObjectsSize; |
| uint8_t* const data = mData; |
| size_t* const objects = mObjects; |
| while (i > 0) { |
| i--; |
| const flat_binder_object* flat |
| = reinterpret_cast<flat_binder_object*>(data+objects[i]); |
| release_object(proc, *flat, this); |
| } |
| } |
| |
| void Parcel::acquireObjects() |
| { |
| const sp<ProcessState> proc(ProcessState::self()); |
| size_t i = mObjectsSize; |
| uint8_t* const data = mData; |
| size_t* const objects = mObjects; |
| while (i > 0) { |
| i--; |
| const flat_binder_object* flat |
| = reinterpret_cast<flat_binder_object*>(data+objects[i]); |
| acquire_object(proc, *flat, this); |
| } |
| } |
| |
| void Parcel::freeData() |
| { |
| freeDataNoInit(); |
| initState(); |
| } |
| |
| void Parcel::freeDataNoInit() |
| { |
| if (mOwner) { |
| //ALOGI("Freeing data ref of %p (pid=%d)\n", this, getpid()); |
| mOwner(this, mData, mDataSize, mObjects, mObjectsSize, mOwnerCookie); |
| } else { |
| releaseObjects(); |
| if (mData) free(mData); |
| if (mObjects) free(mObjects); |
| } |
| } |
| |
| status_t Parcel::growData(size_t len) |
| { |
| size_t newSize = ((mDataSize+len)*3)/2; |
| return (newSize <= mDataSize) |
| ? (status_t) NO_MEMORY |
| : continueWrite(newSize); |
| } |
| |
| status_t Parcel::restartWrite(size_t desired) |
| { |
| if (mOwner) { |
| freeData(); |
| return continueWrite(desired); |
| } |
| |
| uint8_t* data = (uint8_t*)realloc(mData, desired); |
| if (!data && desired > mDataCapacity) { |
| mError = NO_MEMORY; |
| return NO_MEMORY; |
| } |
| |
| releaseObjects(); |
| |
| if (data) { |
| mData = data; |
| mDataCapacity = desired; |
| } |
| |
| mDataSize = mDataPos = 0; |
| ALOGV("restartWrite Setting data size of %p to %d\n", this, mDataSize); |
| ALOGV("restartWrite Setting data pos of %p to %d\n", this, mDataPos); |
| |
| free(mObjects); |
| mObjects = NULL; |
| mObjectsSize = mObjectsCapacity = 0; |
| mNextObjectHint = 0; |
| mHasFds = false; |
| mFdsKnown = true; |
| mAllowFds = true; |
| |
| return NO_ERROR; |
| } |
| |
| status_t Parcel::continueWrite(size_t desired) |
| { |
| // If shrinking, first adjust for any objects that appear |
| // after the new data size. |
| size_t objectsSize = mObjectsSize; |
| if (desired < mDataSize) { |
| if (desired == 0) { |
| objectsSize = 0; |
| } else { |
| while (objectsSize > 0) { |
| if (mObjects[objectsSize-1] < desired) |
| break; |
| objectsSize--; |
| } |
| } |
| } |
| |
| if (mOwner) { |
| // If the size is going to zero, just release the owner's data. |
| if (desired == 0) { |
| freeData(); |
| return NO_ERROR; |
| } |
| |
| // If there is a different owner, we need to take |
| // posession. |
| uint8_t* data = (uint8_t*)malloc(desired); |
| if (!data) { |
| mError = NO_MEMORY; |
| return NO_MEMORY; |
| } |
| size_t* objects = NULL; |
| |
| if (objectsSize) { |
| objects = (size_t*)malloc(objectsSize*sizeof(size_t)); |
| if (!objects) { |
| mError = NO_MEMORY; |
| return NO_MEMORY; |
| } |
| |
| // Little hack to only acquire references on objects |
| // we will be keeping. |
| size_t oldObjectsSize = mObjectsSize; |
| mObjectsSize = objectsSize; |
| acquireObjects(); |
| mObjectsSize = oldObjectsSize; |
| } |
| |
| if (mData) { |
| memcpy(data, mData, mDataSize < desired ? mDataSize : desired); |
| } |
| if (objects && mObjects) { |
| memcpy(objects, mObjects, objectsSize*sizeof(size_t)); |
| } |
| //ALOGI("Freeing data ref of %p (pid=%d)\n", this, getpid()); |
| mOwner(this, mData, mDataSize, mObjects, mObjectsSize, mOwnerCookie); |
| mOwner = NULL; |
| |
| mData = data; |
| mObjects = objects; |
| mDataSize = (mDataSize < desired) ? mDataSize : desired; |
| ALOGV("continueWrite Setting data size of %p to %d\n", this, mDataSize); |
| mDataCapacity = desired; |
| mObjectsSize = mObjectsCapacity = objectsSize; |
| mNextObjectHint = 0; |
| |
| } else if (mData) { |
| if (objectsSize < mObjectsSize) { |
| // Need to release refs on any objects we are dropping. |
| const sp<ProcessState> proc(ProcessState::self()); |
| for (size_t i=objectsSize; i<mObjectsSize; i++) { |
| const flat_binder_object* flat |
| = reinterpret_cast<flat_binder_object*>(mData+mObjects[i]); |
| if (flat->type == BINDER_TYPE_FD) { |
| // will need to rescan because we may have lopped off the only FDs |
| mFdsKnown = false; |
| } |
| release_object(proc, *flat, this); |
| } |
| size_t* objects = |
| (size_t*)realloc(mObjects, objectsSize*sizeof(size_t)); |
| if (objects) { |
| mObjects = objects; |
| } |
| mObjectsSize = objectsSize; |
| mNextObjectHint = 0; |
| } |
| |
| // We own the data, so we can just do a realloc(). |
| if (desired > mDataCapacity) { |
| uint8_t* data = (uint8_t*)realloc(mData, desired); |
| if (data) { |
| mData = data; |
| mDataCapacity = desired; |
| } else if (desired > mDataCapacity) { |
| mError = NO_MEMORY; |
| return NO_MEMORY; |
| } |
| } else { |
| if (mDataSize > desired) { |
| mDataSize = desired; |
| ALOGV("continueWrite Setting data size of %p to %d\n", this, mDataSize); |
| } |
| if (mDataPos > desired) { |
| mDataPos = desired; |
| ALOGV("continueWrite Setting data pos of %p to %d\n", this, mDataPos); |
| } |
| } |
| |
| } else { |
| // This is the first data. Easy! |
| uint8_t* data = (uint8_t*)malloc(desired); |
| if (!data) { |
| mError = NO_MEMORY; |
| return NO_MEMORY; |
| } |
| |
| if(!(mDataCapacity == 0 && mObjects == NULL |
| && mObjectsCapacity == 0)) { |
| ALOGE("continueWrite: %d/%p/%d/%d", mDataCapacity, mObjects, mObjectsCapacity, desired); |
| } |
| |
| mData = data; |
| mDataSize = mDataPos = 0; |
| ALOGV("continueWrite Setting data size of %p to %d\n", this, mDataSize); |
| ALOGV("continueWrite Setting data pos of %p to %d\n", this, mDataPos); |
| mDataCapacity = desired; |
| } |
| |
| return NO_ERROR; |
| } |
| |
| void Parcel::initState() |
| { |
| mError = NO_ERROR; |
| mData = 0; |
| mDataSize = 0; |
| mDataCapacity = 0; |
| mDataPos = 0; |
| ALOGV("initState Setting data size of %p to %d\n", this, mDataSize); |
| ALOGV("initState Setting data pos of %p to %d\n", this, mDataPos); |
| mObjects = NULL; |
| mObjectsSize = 0; |
| mObjectsCapacity = 0; |
| mNextObjectHint = 0; |
| mHasFds = false; |
| mFdsKnown = true; |
| mAllowFds = true; |
| mOwner = NULL; |
| } |
| |
| void Parcel::scanForFds() const |
| { |
| bool hasFds = false; |
| for (size_t i=0; i<mObjectsSize; i++) { |
| const flat_binder_object* flat |
| = reinterpret_cast<const flat_binder_object*>(mData + mObjects[i]); |
| if (flat->type == BINDER_TYPE_FD) { |
| hasFds = true; |
| break; |
| } |
| } |
| mHasFds = hasFds; |
| mFdsKnown = true; |
| } |
| |
| // --- Parcel::Blob --- |
| |
| Parcel::Blob::Blob() : |
| mMapped(false), mData(NULL), mSize(0) { |
| } |
| |
| Parcel::Blob::~Blob() { |
| release(); |
| } |
| |
| void Parcel::Blob::release() { |
| if (mMapped && mData) { |
| ::munmap(mData, mSize); |
| } |
| clear(); |
| } |
| |
| void Parcel::Blob::init(bool mapped, void* data, size_t size) { |
| mMapped = mapped; |
| mData = data; |
| mSize = size; |
| } |
| |
| void Parcel::Blob::clear() { |
| mMapped = false; |
| mData = NULL; |
| mSize = 0; |
| } |
| |
| }; // namespace android |
