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c75c8e75b3
During D88827 it was requested to remove the local implementation
of Memory/File Buffers:
// TODO: refactor the buffer classes in LLVM to enable us to use them here
// directly.
This patch uses raw_ostream instead of Buffers. Generally, using streams
could allow us to reduce memory usages. No need to load all data into the
memory - the data could be streamed through a smaller buffer.
Thus, this patch uses raw_ostream as an interface for output data:
Error executeObjcopyOnBinary(CopyConfig &Config,
object::Binary &In,
raw_ostream &Out);
Note 1. This patch does not change the implementation of Writers
so that data would be directly stored into raw_ostream.
This is assumed to be done later.
Note 2. It would be better if Writers would be implemented in a such way
that data could be streamed without seeking/updating. If that would be
inconvenient then raw_ostream could be replaced with raw_pwrite_stream
to have a possibility to seek back and update file headers.
This is assumed to be done later if necessary.
Note 3. Current FileOutputBuffer allows using a memory-mapped file.
The raw_fd_ostream (which could be used if data should be stored in the file)
does not allow us to use a memory-mapped file. Memory map functionality
could be implemented for raw_fd_ostream:
It is possible to add resize() method into raw_ostream.
class raw_ostream {
void resize(uint64_t size);
}
That method, implemented for raw_fd_ostream, could create a memory-mapped file.
The streamed data would be written into that memory file then.
Thus we would be able to use memory-mapped files with raw_fd_ostream.
This is assumed to be done later if necessary.
Differential Revision: https://reviews.llvm.org/D91028
62 lines
1.6 KiB
CMake
62 lines
1.6 KiB
CMake
set(LLVM_LINK_COMPONENTS
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Object
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Option
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Support
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MC
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)
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set(LLVM_TARGET_DEFINITIONS ObjcopyOpts.td)
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tablegen(LLVM ObjcopyOpts.inc -gen-opt-parser-defs)
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add_public_tablegen_target(ObjcopyOptsTableGen)
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set(LLVM_TARGET_DEFINITIONS InstallNameToolOpts.td)
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tablegen(LLVM InstallNameToolOpts.inc -gen-opt-parser-defs)
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add_public_tablegen_target(InstallNameToolOptsTableGen)
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set(LLVM_TARGET_DEFINITIONS BitcodeStripOpts.td)
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tablegen(LLVM BitcodeStripOpts.inc -gen-opt-parser-defs)
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add_public_tablegen_target(BitcodeStripOptsTableGen)
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set(LLVM_TARGET_DEFINITIONS StripOpts.td)
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tablegen(LLVM StripOpts.inc -gen-opt-parser-defs)
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add_public_tablegen_target(StripOptsTableGen)
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add_llvm_tool(llvm-objcopy
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CopyConfig.cpp
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llvm-objcopy.cpp
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COFF/COFFObjcopy.cpp
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COFF/Object.cpp
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COFF/Reader.cpp
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COFF/Writer.cpp
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ELF/ELFConfig.cpp
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ELF/ELFObjcopy.cpp
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ELF/Object.cpp
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MachO/MachOObjcopy.cpp
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MachO/MachOReader.cpp
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MachO/MachOWriter.cpp
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MachO/MachOLayoutBuilder.cpp
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MachO/Object.cpp
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wasm/Object.cpp
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wasm/Reader.cpp
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wasm/Writer.cpp
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wasm/WasmObjcopy.cpp
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DEPENDS
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ObjcopyOptsTableGen
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InstallNameToolOptsTableGen
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StripOptsTableGen
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)
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add_llvm_tool_symlink(llvm-install-name-tool llvm-objcopy)
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add_llvm_tool_symlink(llvm-bitcode-strip llvm-objcopy)
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add_llvm_tool_symlink(llvm-strip llvm-objcopy)
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if(LLVM_INSTALL_BINUTILS_SYMLINKS)
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add_llvm_tool_symlink(objcopy llvm-objcopy)
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add_llvm_tool_symlink(strip llvm-objcopy)
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endif()
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if(LLVM_INSTALL_CCTOOLS_SYMLINKS)
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add_llvm_tool_symlink(install_name_tool llvm-install-name-tool)
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add_llvm_tool_symlink(bitcode_strip llvm-bitcode-strip)
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endif()
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