Alexander Markov
8e5c172b43
This CL adds internal binary format version to kernel binaries. Kernel readers in the front-end and VM verify that the reader's format version matches the format version in the binary file. This improves detection and diagnostics of stale kernel binary files. Change-Id: Ic69b16057397a84627040bdd6420ffa1852a4b3f Reviewed-on: https://dart-review.googlesource.com/13280 Reviewed-by: Vyacheslav Egorov <vegorov@google.com> Reviewed-by: Jens Johansen <jensj@google.com> Reviewed-by: Kevin Millikin <kmillikin@google.com> Commit-Queue: Alexander Markov <alexmarkov@google.com>
55 lines
1.8 KiB
C++
55 lines
1.8 KiB
C++
// Copyright (c) 2016, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#if !defined(DART_PRECOMPILED_RUNTIME)
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#include "vm/kernel_binary.h"
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#include "platform/globals.h"
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#include "vm/compiler/frontend/kernel_to_il.h"
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#include "vm/flags.h"
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#include "vm/growable_array.h"
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#include "vm/kernel.h"
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#include "vm/os.h"
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namespace dart {
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namespace kernel {
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Program* Program::ReadFrom(Reader* reader) {
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uint32_t magic = reader->ReadUInt32();
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if (magic != kMagicProgramFile) FATAL("Invalid magic identifier");
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uint32_t formatVersion = reader->ReadUInt32();
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if (formatVersion != kBinaryFormatVersion) {
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FATAL2("Invalid kernel binary format version (found %u, expected %u)",
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formatVersion, kBinaryFormatVersion);
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}
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Program* program = new Program();
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program->kernel_data_ = reader->buffer();
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program->kernel_data_size_ = reader->size();
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// Read backwards at the end.
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program->library_count_ = reader->ReadFromIndexNoReset(
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reader->size_, LibraryCountFieldCountFromEnd, 1, 0);
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program->source_table_offset_ = reader->ReadFromIndexNoReset(
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reader->size_,
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LibraryCountFieldCountFromEnd + 1 + program->library_count_ + 1, 4, 0);
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program->name_table_offset_ = reader->ReadUInt32();
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program->string_table_offset_ = reader->ReadUInt32();
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program->main_method_reference_ = NameIndex(reader->ReadUInt32() - 1);
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return program;
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}
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} // namespace kernel
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kernel::Program* ReadPrecompiledKernelFromBuffer(const uint8_t* buffer,
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intptr_t buffer_length) {
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kernel::Reader reader(buffer, buffer_length);
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return kernel::Program::ReadFrom(&reader);
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}
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} // namespace dart
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#endif // !defined(DART_PRECOMPILED_RUNTIME)
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