diff options
Diffstat (limited to 'libs/utils/Parcel.cpp')
| -rw-r--r-- | libs/utils/Parcel.cpp | 1377 |
1 files changed, 0 insertions, 1377 deletions
diff --git a/libs/utils/Parcel.cpp b/libs/utils/Parcel.cpp deleted file mode 100644 index 0f4b647..0000000 --- a/libs/utils/Parcel.cpp +++ /dev/null @@ -1,1377 +0,0 @@ -/* - * 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 <utils/Parcel.h> - -#include <utils/Binder.h> -#include <utils/BpBinder.h> -#include <utils/Debug.h> -#include <utils/ProcessState.h> -#include <utils/Log.h> -#include <utils/String8.h> -#include <utils/String16.h> -#include <utils/TextOutput.h> -#include <utils/misc.h> - -#include <private/utils/binder_module.h> - -#include <stdio.h> -#include <stdlib.h> -#include <stdint.h> - -#ifndef INT32_MAX -#define INT32_MAX ((int32_t)(2147483647)) -#endif - -#define LOG_REFS(...) -//#define LOG_REFS(...) LOG(LOG_DEBUG, "Parcel", __VA_ARGS__) - -// --------------------------------------------------------------------------- - -#define PAD_SIZE(s) (((s)+3)&~3) - -// 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; - } - } - - LOGD("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; - } - } - - LOGE("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) { - LOGE("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) { - LOGE("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. - LOGE("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; - LOGV("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 > mDataSize) 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(Parcel *parcel, size_t offset, size_t len) -{ - const sp<ProcessState> proc(ProcessState::self()); - status_t err; - uint8_t *data = parcel->mData; - 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; - - // grow data - err = growData(len); - if (err != NO_ERROR) { - return err; - } - - // append data - memcpy(mData + mDataPos, data + offset, len); - mDataPos += len; - mDataSize += len; - - 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++; - - const flat_binder_object* flat - = reinterpret_cast<flat_binder_object*>(mData + off); - acquire_object(proc, *flat, this); - - // take note if the object is a file descriptor - if (flat->type == BINDER_TYPE_FD) { - mHasFds = mFdsKnown = true; - } - } - } - - return NO_ERROR; -} - -bool Parcel::hasFileDescriptors() const -{ - if (!mFdsKnown) { - scanForFds(); - } - return mHasFds; -} - -status_t Parcel::writeInterfaceToken(const String16& interface) -{ - // currently the interface identification token is just its name as a string - return writeString16(interface); -} - -bool Parcel::enforceInterface(const String16& interface) const -{ - String16 str = readString16(); - if (str == interface) { - return true; - } else { - LOGW("**** 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; - LOGV("finishWrite Setting data pos of %p to %d\n", this, mDataPos); - if (mDataPos > mDataSize) { - mDataSize = mDataPos; - LOGV("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) -{ - if ((mDataPos+sizeof(val)) <= mDataCapacity) { -restart_write: - *reinterpret_cast<int32_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::writeInt64(int64_t val) -{ - if ((mDataPos+sizeof(val)) <= mDataCapacity) { -restart_write: - *reinterpret_cast<int64_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::writeFloat(float val) -{ - if ((mDataPos+sizeof(val)) <= mDataCapacity) { -restart_write: - *reinterpret_cast<float*>(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::writeDouble(double val) -{ - if ((mDataPos+sizeof(val)) <= mDataCapacity) { -restart_write: - *reinterpret_cast<double*>(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::writeCString(const char* str) -{ - return write(str, strlen(str)+1); -} - -status_t Parcel::writeString8(const String8& str) -{ - status_t err = writeInt32(str.bytes()); - if (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.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) { - LOGD("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) -{ - flat_binder_object obj; - obj.type = BINDER_TYPE_FD; - obj.flags = 0x7f | FLAT_BINDER_FLAG_ACCEPTS_FDS; - obj.handle = fd; - obj.cookie = (void*)0; - return writeObject(obj, true); -} - -status_t Parcel::writeDupFileDescriptor(int fd) -{ - flat_binder_object obj; - obj.type = BINDER_TYPE_FD; - obj.flags = 0x7f | FLAT_BINDER_FLAG_ACCEPTS_FDS; - obj.handle = dup(fd); - obj.cookie = (void*)1; - return writeObject(obj, true); -} - -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) { - 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; -} - - -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); - LOGV("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); - LOGV("readInplace Setting data pos of %p to %d\n", this, mDataPos); - return data; - } - return NULL; -} - -status_t Parcel::readInt32(int32_t *pArg) const -{ - if ((mDataPos+sizeof(int32_t)) <= mDataSize) { - const void* data = mData+mDataPos; - mDataPos += sizeof(int32_t); - *pArg = *reinterpret_cast<const int32_t*>(data); - return NO_ERROR; - } else { - return NOT_ENOUGH_DATA; - } -} - -int32_t Parcel::readInt32() const -{ - if ((mDataPos+sizeof(int32_t)) <= mDataSize) { - const void* data = mData+mDataPos; - mDataPos += sizeof(int32_t); - LOGV("readInt32 Setting data pos of %p to %d\n", this, mDataPos); - return *reinterpret_cast<const int32_t*>(data); - } - return 0; -} - - -status_t Parcel::readInt64(int64_t *pArg) const -{ - if ((mDataPos+sizeof(int64_t)) <= mDataSize) { - const void* data = mData+mDataPos; - mDataPos += sizeof(int64_t); - *pArg = *reinterpret_cast<const int64_t*>(data); - LOGV("readInt64 Setting data pos of %p to %d\n", this, mDataPos); - return NO_ERROR; - } else { - return NOT_ENOUGH_DATA; - } -} - - -int64_t Parcel::readInt64() const -{ - if ((mDataPos+sizeof(int64_t)) <= mDataSize) { - const void* data = mData+mDataPos; - mDataPos += sizeof(int64_t); - LOGV("readInt64 Setting data pos of %p to %d\n", this, mDataPos); - return *reinterpret_cast<const int64_t*>(data); - } - return 0; -} - -status_t Parcel::readFloat(float *pArg) const -{ - if ((mDataPos+sizeof(float)) <= mDataSize) { - const void* data = mData+mDataPos; - mDataPos += sizeof(float); - LOGV("readFloat Setting data pos of %p to %d\n", this, mDataPos); - *pArg = *reinterpret_cast<const float*>(data); - return NO_ERROR; - } else { - return NOT_ENOUGH_DATA; - } -} - - -float Parcel::readFloat() const -{ - if ((mDataPos+sizeof(float)) <= mDataSize) { - const void* data = mData+mDataPos; - mDataPos += sizeof(float); - LOGV("readFloat Setting data pos of %p to %d\n", this, mDataPos); - return *reinterpret_cast<const float*>(data); - } - return 0; -} - -status_t Parcel::readDouble(double *pArg) const -{ - if ((mDataPos+sizeof(double)) <= mDataSize) { - const void* data = mData+mDataPos; - mDataPos += sizeof(double); - LOGV("readDouble Setting data pos of %p to %d\n", this, mDataPos); - *pArg = *reinterpret_cast<const double*>(data); - return NO_ERROR; - } else { - return NOT_ENOUGH_DATA; - } -} - - -double Parcel::readDouble() const -{ - if ((mDataPos+sizeof(double)) <= mDataSize) { - const void* data = mData+mDataPos; - mDataPos += sizeof(double); - LOGV("readDouble Setting data pos of %p to %d\n", this, mDataPos); - return *reinterpret_cast<const double*>(data); - } - return 0; -} - - -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); - LOGV("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); - LOGE("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; -} - - -native_handle* Parcel::readNativeHandle(native_handle* (*alloc)(void*, int, int), void* cookie) 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; - if (alloc == 0) { - size_t size = sizeof(native_handle) + sizeof(int)*(numFds + numInts); - h = (native_handle*)malloc(size); - h->version = sizeof(native_handle); - h->numFds = numFds; - h->numInts = numInts; - } else { - h = alloc(cookie, numFds, numInts); - if (h->version != sizeof(native_handle)) { - return 0; - } - } - - 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) { - if (alloc == 0) { - free(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: - //LOGI("Returning file descriptor %ld from parcel %p\n", flat->handle, this); - return flat->handle; - } - } - return BAD_TYPE; -} - -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. - LOGV("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) { - LOGV("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! - LOGV("Parcel found obj %d at index %d with forward search", - this, DPOS, opos); - mNextObjectHint = opos+1; - LOGV("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! - LOGV("Parcel found obj %d at index %d with backward search", - this, DPOS, opos); - mNextObjectHint = opos+1; - LOGV("readObject Setting data pos of %p to %d\n", this, mDataPos); - return obj; - } - } - LOGW("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) { - //LOGI("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) { - //LOGI("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; - //LOGI("setDataReference Setting data size of %p to %lu (pid=%d)\n", this, mDataSize, getpid()); - mDataPos = 0; - LOGV("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) { - //LOGI("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; - LOGV("restartWrite Setting data size of %p to %d\n", this, mDataSize); - LOGV("restartWrite Setting data pos of %p to %d\n", this, mDataPos); - - free(mObjects); - mObjects = NULL; - mObjectsSize = mObjectsCapacity = 0; - mNextObjectHint = 0; - mHasFds = false; - mFdsKnown = 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)); - } - //LOGI("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; - LOGV("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 { - mDataSize = desired; - LOGV("continueWrite Setting data size of %p to %d\n", this, mDataSize); - if (mDataPos > desired) { - mDataPos = desired; - LOGV("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)) { - LOGE("continueWrite: %d/%p/%d/%d", mDataCapacity, mObjects, mObjectsCapacity, desired); - } - - mData = data; - mDataSize = mDataPos = 0; - LOGV("continueWrite Setting data size of %p to %d\n", this, mDataSize); - LOGV("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; - LOGV("initState Setting data size of %p to %d\n", this, mDataSize); - LOGV("initState Setting data pos of %p to %d\n", this, mDataPos); - mObjects = NULL; - mObjectsSize = 0; - mObjectsCapacity = 0; - mNextObjectHint = 0; - mHasFds = false; - mFdsKnown = 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; -} - -}; // namespace android |