Split elf_writer_debug.cc to several files.
Refactoring only. The file has grown significantly over time,
and it is time to split it so it can be better managed.
Change-Id: Idce0231718add722292f4701df353d5baf31de5f
diff --git a/compiler/debug/elf_gnu_debugdata_writer.h b/compiler/debug/elf_gnu_debugdata_writer.h
new file mode 100644
index 0000000..5c7d1c7
--- /dev/null
+++ b/compiler/debug/elf_gnu_debugdata_writer.h
@@ -0,0 +1,111 @@
+/*
+ * Copyright (C) 2016 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.
+ */
+
+#ifndef ART_COMPILER_DEBUG_ELF_GNU_DEBUGDATA_WRITER_H_
+#define ART_COMPILER_DEBUG_ELF_GNU_DEBUGDATA_WRITER_H_
+
+#include <vector>
+
+#include "arch/instruction_set.h"
+#include "elf_builder.h"
+#include "linker/vector_output_stream.h"
+
+// liblzma.
+#include "7zCrc.h"
+#include "XzCrc64.h"
+#include "XzEnc.h"
+
+namespace art {
+namespace debug {
+
+static void XzCompress(const std::vector<uint8_t>* src, std::vector<uint8_t>* dst) {
+ // Configure the compression library.
+ CrcGenerateTable();
+ Crc64GenerateTable();
+ CLzma2EncProps lzma2Props;
+ Lzma2EncProps_Init(&lzma2Props);
+ lzma2Props.lzmaProps.level = 1; // Fast compression.
+ Lzma2EncProps_Normalize(&lzma2Props);
+ CXzProps props;
+ XzProps_Init(&props);
+ props.lzma2Props = &lzma2Props;
+ // Implement the required interface for communication (written in C so no virtual methods).
+ struct XzCallbacks : public ISeqInStream, public ISeqOutStream, public ICompressProgress {
+ static SRes ReadImpl(void* p, void* buf, size_t* size) {
+ auto* ctx = static_cast<XzCallbacks*>(reinterpret_cast<ISeqInStream*>(p));
+ *size = std::min(*size, ctx->src_->size() - ctx->src_pos_);
+ memcpy(buf, ctx->src_->data() + ctx->src_pos_, *size);
+ ctx->src_pos_ += *size;
+ return SZ_OK;
+ }
+ static size_t WriteImpl(void* p, const void* buf, size_t size) {
+ auto* ctx = static_cast<XzCallbacks*>(reinterpret_cast<ISeqOutStream*>(p));
+ const uint8_t* buffer = reinterpret_cast<const uint8_t*>(buf);
+ ctx->dst_->insert(ctx->dst_->end(), buffer, buffer + size);
+ return size;
+ }
+ static SRes ProgressImpl(void* , UInt64, UInt64) {
+ return SZ_OK;
+ }
+ size_t src_pos_;
+ const std::vector<uint8_t>* src_;
+ std::vector<uint8_t>* dst_;
+ };
+ XzCallbacks callbacks;
+ callbacks.Read = XzCallbacks::ReadImpl;
+ callbacks.Write = XzCallbacks::WriteImpl;
+ callbacks.Progress = XzCallbacks::ProgressImpl;
+ callbacks.src_pos_ = 0;
+ callbacks.src_ = src;
+ callbacks.dst_ = dst;
+ // Compress.
+ SRes res = Xz_Encode(&callbacks, &callbacks, &props, &callbacks);
+ CHECK_EQ(res, SZ_OK);
+}
+
+template <typename ElfTypes>
+static std::vector<uint8_t> MakeMiniDebugInfoInternal(
+ InstructionSet isa,
+ size_t rodata_section_size,
+ size_t text_section_size,
+ const ArrayRef<const MethodDebugInfo>& method_infos) {
+ std::vector<uint8_t> buffer;
+ buffer.reserve(KB);
+ VectorOutputStream out("Mini-debug-info ELF file", &buffer);
+ std::unique_ptr<ElfBuilder<ElfTypes>> builder(new ElfBuilder<ElfTypes>(isa, &out));
+ builder->Start();
+ // Mirror .rodata and .text as NOBITS sections.
+ // It is needed to detected relocations after compression.
+ builder->GetRoData()->WriteNoBitsSection(rodata_section_size);
+ builder->GetText()->WriteNoBitsSection(text_section_size);
+ WriteDebugSymbols(builder.get(), method_infos, false /* with_signature */);
+ WriteCFISection(builder.get(),
+ method_infos,
+ dwarf::DW_DEBUG_FRAME_FORMAT,
+ false /* write_oat_paches */);
+ builder->End();
+ CHECK(builder->Good());
+ std::vector<uint8_t> compressed_buffer;
+ compressed_buffer.reserve(buffer.size() / 4);
+ XzCompress(&buffer, &compressed_buffer);
+ return compressed_buffer;
+}
+
+} // namespace debug
+} // namespace art
+
+#endif // ART_COMPILER_DEBUG_ELF_GNU_DEBUGDATA_WRITER_H_
+