| /* |
| * Copyright 2012, 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. |
| */ |
| |
| #include "Source.h" |
| |
| #include <new> |
| |
| #include <llvm/Bitcode/ReaderWriter.h> |
| #include <llvm/LLVMContext.h> |
| #include <llvm/Linker.h> |
| #include <llvm/Module.h> |
| #include <llvm/Support/MemoryBuffer.h> |
| #include <llvm/Support/system_error.h> |
| |
| #include "BCCContext.h" |
| #include "BCCContextImpl.h" |
| #include "DebugHelper.h" |
| |
| namespace { |
| |
| // Helper function to load the bitcode. This uses "bitcode lazy load" feature to |
| // reduce the startup time. On success, return the LLVM module object created |
| // and take the ownership of input memory buffer (i.e., pInput). On error, |
| // return NULL and will NOT take the ownership of pInput. |
| static inline llvm::Module *helper_load_bitcode(llvm::LLVMContext &pContext, |
| llvm::MemoryBuffer *pInput) { |
| std::string error; |
| llvm::Module *module = llvm::getLazyBitcodeModule(pInput, pContext, &error); |
| |
| if (module == NULL) { |
| ALOGE("Unable to parse the given bitcode file `%s'! (%s)", |
| pInput->getBufferIdentifier(), error.c_str()); |
| } |
| |
| return module; |
| } |
| |
| } // end anonymous namespace |
| |
| namespace bcc { |
| |
| Source *Source::CreateFromBuffer(BCCContext &pContext, |
| const char *pName, |
| const char *pBitcode, |
| size_t pBitcodeSize) { |
| llvm::StringRef input_data(pBitcode, pBitcodeSize); |
| llvm::MemoryBuffer *input_memory = |
| llvm::MemoryBuffer::getMemBuffer(input_data, pName); |
| |
| if (input_memory == NULL) { |
| ALOGE("Unable to load bitcode `%s' from buffer!", pName); |
| return NULL; |
| } |
| |
| llvm::Module *module = helper_load_bitcode(pContext.mImpl->mLLVMContext, |
| input_memory); |
| if (module == NULL) { |
| delete input_memory; |
| return NULL; |
| } |
| |
| Source *result = CreateFromModule(pContext, *module, /* pNoDelete */false); |
| if (result == NULL) { |
| delete module; |
| } |
| |
| return result; |
| } |
| |
| |
| Source *Source::CreateFromFile(BCCContext &pContext, const std::string &pPath) { |
| llvm::OwningPtr<llvm::MemoryBuffer> input_data; |
| |
| llvm::error_code ec = llvm::MemoryBuffer::getFile(pPath, input_data); |
| if (ec != llvm::error_code::success()) { |
| ALOGE("Failed to load bitcode from path %s! (%s)", pPath.c_str(), |
| ec.message().c_str()); |
| return NULL; |
| } |
| |
| llvm::MemoryBuffer *input_memory = input_data.take(); |
| llvm::Module *module = helper_load_bitcode(pContext.mImpl->mLLVMContext, |
| input_memory); |
| if (module == NULL) { |
| delete input_memory; |
| return NULL; |
| } |
| |
| Source *result = CreateFromModule(pContext, *module, /* pNoDelete */false); |
| if (result == NULL) { |
| delete module; |
| } |
| |
| return result; |
| } |
| |
| |
| Source *Source::CreateFromModule(BCCContext &pContext, llvm::Module &pModule, |
| bool pNoDelete) { |
| Source *result = new (std::nothrow) Source(pContext, pModule, pNoDelete); |
| if (result == NULL) { |
| ALOGE("Out of memory during Source object allocation for `%s'!", |
| pModule.getModuleIdentifier().c_str()); |
| } |
| return result; |
| } |
| |
| Source::Source(BCCContext &pContext, llvm::Module &pModule, bool pNoDelete) |
| : mContext(pContext), mModule(&pModule), mNoDelete(pNoDelete) { |
| pContext.addSource(*this); |
| } |
| |
| Source::~Source() { |
| mContext.removeSource(*this); |
| if (!mNoDelete) |
| delete mModule; |
| } |
| |
| bool Source::merge(Source &pSource, bool pPreserveSource) { |
| std::string error; |
| llvm::Linker::LinkerMode mode = |
| ((pPreserveSource) ? llvm::Linker::PreserveSource : |
| llvm::Linker::DestroySource); |
| |
| if (llvm::Linker::LinkModules(mModule, &pSource.getModule(), |
| mode, &error) != 0) { |
| ALOGE("Failed to link source `%s' with `%s' (%s)!", |
| getIdentifier().c_str(), |
| pSource.getIdentifier().c_str(), |
| error.c_str()); |
| return false; |
| } |
| |
| if (!pPreserveSource) { |
| pSource.mNoDelete = true; |
| delete &pSource; |
| } |
| |
| return true; |
| } |
| |
| Source *Source::CreateEmpty(BCCContext &pContext, const std::string &pName) { |
| // Create an empty module |
| llvm::Module *module = |
| new (std::nothrow) llvm::Module(pName, pContext.mImpl->mLLVMContext); |
| |
| if (module == NULL) { |
| ALOGE("Out of memory when creating empty LLVM module `%s'!", pName.c_str()); |
| return NULL; |
| } |
| |
| Source *result = CreateFromModule(pContext, *module, /* pNoDelete */false); |
| if (result == NULL) { |
| delete module; |
| } |
| |
| return result; |
| } |
| |
| const std::string &Source::getIdentifier() const { |
| return mModule->getModuleIdentifier(); |
| } |
| |
| } // namespace bcc |