Teagan Strickland
089aeedf56
Removes an unnecessary change to the names of type testing stubs that allowed name collisions to happen. Old commit message: The flag can be used when creating AOT snapshots. The resulting file can be used with package:vm/dwarf/convert.dart to convert DWARF-based stack traces to stack traces with function, file, and line number information. Currently the saved file will be an ELF file with DWARF debugging information, but this is subject to change in the future. To avoid being affected by any changes in format, read the DWARF information from the file using Dwarf.fromFile() in package:vm/dwarf/dwarf.dart. Also adds --dwarf-stack-traces to the VM global flag list, so its value at compilation will be read out of snapshots by the precompiled runtime. Fixes https://github.com/dart-lang/sdk/issues/39512, which was due to a missing compiler::target:: prefix for Instructions::HeaderSize() in BlobImageWriter::WriteText(). Exposes the information suggested in https://github.com/dart-lang/sdk/issues/39490 so that package:vm/dwarf can appropriately convert absolute PC addresses to the correct virtual address for a given DWARF line number program. Bug: https://github.com/dart-lang/sdk/issues/35851 Change-Id: I6723449dceb0b89c054a1f1e70e7acd7749baf14 Cq-Include-Trybots: luci.dart.try:vm-kernel-precomp-linux-release-x64-try,vm-kernel-precomp-android-release-arm64-try,vm-kernel-precomp-mac-release-simarm64-try,vm-kernel-precomp-win-release-x64-try Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/128730 Reviewed-by: Martin Kustermann <kustermann@google.com>
175 lines
4.0 KiB
C++
175 lines
4.0 KiB
C++
// Copyright (c) 2019, 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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#ifndef RUNTIME_PLATFORM_ELF_H_
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#define RUNTIME_PLATFORM_ELF_H_
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#include "platform/globals.h"
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namespace dart {
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namespace elf {
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#pragma pack(push, 1)
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struct ElfHeader {
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uint8_t ident[16];
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uint16_t type;
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uint16_t machine;
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uint32_t version;
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#if defined(TARGET_ARCH_IS_32_BIT)
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uint32_t entry_point;
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uint32_t program_table_offset;
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uint32_t section_table_offset;
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#else
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uint64_t entry_point;
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uint64_t program_table_offset;
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uint64_t section_table_offset;
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#endif
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uint32_t flags;
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uint16_t header_size;
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uint16_t program_table_entry_size;
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uint16_t num_program_headers;
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uint16_t section_table_entry_size;
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uint16_t num_section_headers;
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uint16_t shstrtab_section_index;
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};
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enum class ProgramHeaderType : uint32_t {
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PT_LOAD = 1,
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PT_DYNAMIC = 2,
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PT_PHDR = 6,
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};
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struct ProgramHeader {
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#if defined(TARGET_ARCH_IS_32_BIT)
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ProgramHeaderType type;
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uint32_t file_offset;
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uint32_t memory_offset;
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uint32_t physical_memory_offset;
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uint32_t file_size;
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uint32_t memory_size;
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uint32_t flags;
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uint32_t alignment;
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#else
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ProgramHeaderType type;
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uint32_t flags;
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uint64_t file_offset;
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uint64_t memory_offset;
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uint64_t physical_memory_offset;
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uint64_t file_size;
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uint64_t memory_size;
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uint64_t alignment;
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#endif
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};
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struct SectionHeader {
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#if defined(TARGET_ARCH_IS_32_BIT)
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uint32_t name;
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uint32_t type;
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uint32_t flags;
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uint32_t memory_offset;
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uint32_t file_offset;
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uint32_t file_size;
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uint32_t link;
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uint32_t info;
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uint32_t alignment;
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uint32_t entry_size;
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#else
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uint32_t name;
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uint32_t type;
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uint64_t flags;
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uint64_t memory_offset;
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uint64_t file_offset;
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uint64_t file_size;
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uint32_t link;
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uint32_t info;
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uint64_t alignment;
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uint64_t entry_size;
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#endif
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};
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struct Symbol {
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#if defined(TARGET_ARCH_IS_32_BIT)
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uint32_t name;
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uint32_t value;
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uint32_t size;
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uint8_t info;
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uint8_t other; // Reserved by ELF.
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uint16_t section;
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#else
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uint32_t name;
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uint8_t info;
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uint8_t other; // Reserved by ELF.
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uint16_t section;
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uint64_t value;
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uint64_t size;
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#endif
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};
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#pragma pack(pop)
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static constexpr intptr_t ELFCLASS32 = 1;
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static constexpr intptr_t ELFCLASS64 = 2;
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static const intptr_t EI_DATA = 5;
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static const intptr_t ELFDATA2LSB = 1;
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static const intptr_t ELFOSABI_SYSV = 0;
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static const intptr_t ET_DYN = 3;
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static constexpr intptr_t EF_ARM_ABI_FLOAT_HARD = 0x00000400;
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static constexpr intptr_t EF_ARM_ABI_FLOAT_SOFT = 0x00000200;
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static constexpr intptr_t EF_ARM_ABI = 0x05000000;
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static constexpr intptr_t EM_386 = 3;
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static constexpr intptr_t EM_ARM = 40;
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static constexpr intptr_t EM_X86_64 = 62;
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static constexpr intptr_t EM_AARCH64 = 183;
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static const intptr_t EV_CURRENT = 1;
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static const intptr_t PF_X = 1;
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static const intptr_t PF_W = 2;
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static const intptr_t PF_R = 4;
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static const intptr_t SHT_PROGBITS = 1;
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static const intptr_t SHT_SYMTAB = 2;
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static const intptr_t SHT_STRTAB = 3;
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static const intptr_t SHT_HASH = 5;
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static const intptr_t SHT_NOBITS = 8;
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static const intptr_t SHT_DYNAMIC = 6;
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static const intptr_t SHT_DYNSYM = 11;
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static const intptr_t SHF_WRITE = 0x1;
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static const intptr_t SHF_ALLOC = 0x2;
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static const intptr_t SHF_EXECINSTR = 0x4;
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static const intptr_t SHN_UNDEF = 0;
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static const intptr_t STN_UNDEF = 0;
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static const intptr_t PT_LOAD = 1;
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static const intptr_t PT_DYNAMIC = 2;
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static const intptr_t PT_PHDR = 6;
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static const intptr_t STB_LOCAL = 0;
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static const intptr_t STB_GLOBAL = 1;
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static const intptr_t STT_OBJECT = 1; // I.e., data.
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static const intptr_t STT_FUNC = 2;
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static const intptr_t STT_SECTION = 3;
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static const intptr_t DT_NULL = 0;
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static const intptr_t DT_HASH = 4;
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static const intptr_t DT_STRTAB = 5;
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static const intptr_t DT_SYMTAB = 6;
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static const intptr_t DT_STRSZ = 10;
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static const intptr_t DT_SYMENT = 11;
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} // namespace elf
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} // namespace dart
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#endif // RUNTIME_PLATFORM_ELF_H_
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