llvmorg-github-actions[bot] wrote:
<!--LLVM PR SUMMARY COMMENT--> @llvm/pr-subscribers-lldb Author: Yao Qi (qiyao) <details> <summary>Changes</summary> target.dict gives the mutator the magic bytes and required keys for every object file format. Without a seed dictionary, blind mutation essentially never lands the exact multi-byte magic these formats gate on. Assisted-by: claude --- Full diff: https://github.com/llvm/llvm-project/pull/221348.diff 2 Files Affected: - (modified) lldb/tools/lldb-fuzzer/lldb-target-fuzzer/CMakeLists.txt (+1) - (added) lldb/tools/lldb-fuzzer/lldb-target-fuzzer/target.dict (+52) ``````````diff diff --git a/lldb/tools/lldb-fuzzer/lldb-target-fuzzer/CMakeLists.txt b/lldb/tools/lldb-fuzzer/lldb-target-fuzzer/CMakeLists.txt index c71b2731ef769..39b1e69f86b3b 100644 --- a/lldb/tools/lldb-fuzzer/lldb-target-fuzzer/CMakeLists.txt +++ b/lldb/tools/lldb-fuzzer/lldb-target-fuzzer/CMakeLists.txt @@ -23,6 +23,7 @@ if(TARGET lldb-target-fuzzer) COMMENT "Running the LLDB target fuzzer..." WORKING_DIRECTORY ${CMAKE_BINARY_DIR}/fuzzer-artifacts/target-artifacts COMMAND $<TARGET_FILE:lldb-target-fuzzer> -artifact_prefix=target- + -dict=${CMAKE_CURRENT_SOURCE_DIR}/target.dict USES_TERMINAL ) set_target_properties(fuzz-lldb-target PROPERTIES FOLDER "LLDB/Fuzzer") diff --git a/lldb/tools/lldb-fuzzer/lldb-target-fuzzer/target.dict b/lldb/tools/lldb-fuzzer/lldb-target-fuzzer/target.dict new file mode 100644 index 0000000000000..a597537981f32 --- /dev/null +++ b/lldb/tools/lldb-fuzzer/lldb-target-fuzzer/target.dict @@ -0,0 +1,52 @@ +# Magic bytes for the object file. +# +# libFuzzer only understands the \\, \" and \xAB escapes, so \x0a below is a +# newline. + +# ELF, with EI_CLASS and EI_DATA: CreateInstance rejects the file unless +# AddressSizeInBytes says 4 or 8. +elf64_le="\x7fELF\x02\x01\x01" +elf32_le="\x7fELF\x01\x01\x01" +elf64_be="\x7fELF\x02\x02\x01" +elf_et_core="\x04\x00" +# e_phnum sentinel that moves the real count into section 0's sh_info. +elf_pn_xnum="\xff\xff" + +# Mach-O, both bitnesses and byte orders, plus the universal container. +macho_magic_64="\xcf\xfa\xed\xfe" +macho_magic_32="\xce\xfa\xed\xfe" +macho_cigam_64="\xfe\xed\xfa\xcf" +macho_cigam_32="\xfe\xed\xfa\xce" +fat_magic="\xca\xfe\xba\xbe" +fat_magic_64="\xca\xfe\xba\xbf" + +# PE needs both the DOS stub magic and the signature e_lfanew points at. +dos_magic="MZ" +pe_signature="PE\x00\x00" + +# Bare COFF is recognised by its machine field alone. +coff_amd64="\x64\x86" +coff_i386="\x4c\x01" +coff_arm64="\x64\xaa" + +# XCOFF::MagicNumber, read big endian. +xcoff32="\x01\xdf" +xcoff64="\x01\xf7" + +wasm_magic="\x00asm" +wasm_version="\x01\x00\x00\x00" + +# The first two lines Breakpad's Header::parse wants. +breakpad_module="MODULE \x0a" +breakpad_info="INFO CODE_ID \x0a" + +# The three required keys of ObjectFileJSON's header (triple, uuid, type), +# plus "symbols" from its optional body. +json_open="{\"triple\":" +json_uuid="\"uuid\":" +json_type="\"type\":" +json_symbols="\"symbols\":" + +# Object containers. +bsd_archive="!<arch>\x0a" +big_archive="<bigaf>\x0a" `````````` </details> https://github.com/llvm/llvm-project/pull/221348 _______________________________________________ lldb-commits mailing list [email protected] https://lists.llvm.org/cgi-bin/mailman/listinfo/lldb-commits
