From 2faab0064bccdf06a454ba5fc37f2cfeceab78bc Mon Sep 17 00:00:00 2001
From: David Srbecky <dsrbecky@google.com>
Date: Tue, 12 Feb 2019 16:35:48 +0000
Subject: Create libelffile library for ELF file manipulation.

Move some of our tooling to library to make it reusable.

Remove MIPS support from the ELF builder.  This is slightly
easier than making it independent of the runtime.

Bug: 110133331
Test: test.py -b --host
Change-Id: I93343808d0e27ee8e1117e713a2503e8179fc245
---
 compiler/debug/xz_utils.cc | 134 ---------------------------------------------
 1 file changed, 134 deletions(-)
 delete mode 100644 compiler/debug/xz_utils.cc

(limited to 'compiler/debug/xz_utils.cc')

diff --git a/compiler/debug/xz_utils.cc b/compiler/debug/xz_utils.cc
deleted file mode 100644
index 5b36209d2f..0000000000
--- a/compiler/debug/xz_utils.cc
+++ /dev/null
@@ -1,134 +0,0 @@
-/*
- * Copyright (C) 2018 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 "xz_utils.h"
-
-#include <vector>
-#include <mutex>
-
-#include "base/array_ref.h"
-#include "base/bit_utils.h"
-#include "base/leb128.h"
-#include "dwarf/writer.h"
-
-// liblzma.
-#include "7zCrc.h"
-#include "Xz.h"
-#include "XzCrc64.h"
-#include "XzEnc.h"
-
-namespace art {
-namespace debug {
-
-constexpr size_t kChunkSize = kPageSize;
-
-static void XzInitCrc() {
-  static std::once_flag crc_initialized;
-  std::call_once(crc_initialized, []() {
-    CrcGenerateTable();
-    Crc64GenerateTable();
-  });
-}
-
-void XzCompress(ArrayRef<const uint8_t> src, std::vector<uint8_t>* dst) {
-  // Configure the compression library.
-  XzInitCrc();
-  CLzma2EncProps lzma2Props;
-  Lzma2EncProps_Init(&lzma2Props);
-  lzma2Props.lzmaProps.level = 1;  // Fast compression.
-  lzma2Props.lzmaProps.reduceSize = src.size();  // Size of data that will be compressed.
-  lzma2Props.blockSize = kChunkSize;
-  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(const ISeqInStream* p, void* buf, size_t* size) {
-      auto* ctx = static_cast<XzCallbacks*>(const_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(const ISeqOutStream* p, const void* buf, size_t size) {
-      auto* ctx = static_cast<const XzCallbacks*>(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(const ICompressProgress* , UInt64, UInt64) {
-      return SZ_OK;
-    }
-    size_t src_pos_;
-    ArrayRef<const 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);
-
-  // Decompress the data back and check that we get the original.
-  if (kIsDebugBuild) {
-    std::vector<uint8_t> decompressed;
-    XzDecompress(ArrayRef<const uint8_t>(*dst), &decompressed);
-    DCHECK_EQ(decompressed.size(), src.size());
-    DCHECK_EQ(memcmp(decompressed.data(), src.data(), src.size()), 0);
-  }
-}
-
-void XzDecompress(ArrayRef<const uint8_t> src, std::vector<uint8_t>* dst) {
-  XzInitCrc();
-  std::unique_ptr<CXzUnpacker> state(new CXzUnpacker());
-  ISzAlloc alloc;
-  alloc.Alloc = [](ISzAllocPtr, size_t size) { return malloc(size); };
-  alloc.Free = [](ISzAllocPtr, void* ptr) { return free(ptr); };
-  XzUnpacker_Construct(state.get(), &alloc);
-
-  size_t src_offset = 0;
-  size_t dst_offset = 0;
-  ECoderStatus status;
-  do {
-    dst->resize(RoundUp(dst_offset + kPageSize / 4, kPageSize));
-    size_t src_remaining = src.size() - src_offset;
-    size_t dst_remaining = dst->size() - dst_offset;
-    int return_val = XzUnpacker_Code(state.get(),
-                                     dst->data() + dst_offset,
-                                     &dst_remaining,
-                                     src.data() + src_offset,
-                                     &src_remaining,
-                                     true,
-                                     CODER_FINISH_ANY,
-                                     &status);
-    CHECK_EQ(return_val, SZ_OK);
-    src_offset += src_remaining;
-    dst_offset += dst_remaining;
-  } while (status == CODER_STATUS_NOT_FINISHED);
-  CHECK_EQ(src_offset, src.size());
-  CHECK(XzUnpacker_IsStreamWasFinished(state.get()));
-  XzUnpacker_Free(state.get());
-  dst->resize(dst_offset);
-}
-
-}  // namespace debug
-}  // namespace art
-- 
cgit v1.2.3-59-g8ed1b