92 lines
3 KiB
Text
92 lines
3 KiB
Text
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#------------------------------------------------------------------------------
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# $File: coverage,v 1.3 2021/02/23 00:51:10 christos Exp $
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# xoverage: file(1) magic for test coverage data
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# File formats used to store test coverage data
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# 2016-05-21, Georg Sauthoff <mail@georg.so>
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# - GCC gcno - written by GCC at compile time when compiling with
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# gcc -ftest-coverage
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# - GCC gcda - written by a program that was compiled with
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# gcc -fprofile-arcs
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# - LLVM raw profiles - generated by a program compiled with
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# clang -fprofile-instr-generate -fcoverage-mapping ...
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# - LLVM indexed profiles - generated by
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# llvm-profdata
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# - GCOV reports, i.e. the annotated source code
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# - LCOV trace files, i.e. aggregated GCC profiles
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#
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# GCC coverage tracefiles
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# .gcno file are created during compile time,
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# while data collected during runtime is stored in .gcda files
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# cf. gcov-io.h
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# https://gcc.gnu.org/onlinedocs/gcc-5.3.0/gcc/Gcov-Data-Files.html
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# Examples:
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# Fedora 23/x86-64/gcc-5.3.1: 6f 6e 63 67 52 33 30 35
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# Debian 8 PPC64/gcc-4.9.2 : 67 63 6e 6f 34 30 39 2a
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0 lelong 0x67636e6f GCC gcno coverage (-ftest-coverage),
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>&3 byte x version %c.
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>&1 byte x \b%c
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# big endian
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0 belong 0x67636e6f GCC gcno coverage (-ftest-coverage),
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>&0 byte x version %c.
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>&2 byte x \b%c (big-endian)
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# Examples:
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# Fedora 23/x86-64/gcc-5.3.1: 61 64 63 67 52 33 30 35
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# Debian 8 PPC64/gcc-4.9.2 : 67 63 64 61 34 30 39 2a
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0 lelong 0x67636461 GCC gcda coverage (-fprofile-arcs),
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>&3 byte x version %c.
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>&1 byte x \b%c
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# big endian
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0 belong 0x67636461 GCC gcda coverage (-fprofile-arcs),
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>&0 byte x version %c.
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>&2 byte x \b%c (big-endian)
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# LCOV tracefiles
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# cf. http://ltp.sourceforge.net/coverage/lcov/geninfo.1.php
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0 string TN:
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>&0 search/64 \nSF:/ LCOV coverage tracefile
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# Coverage reports generated by gcov
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# i.e. source code annotated with coverage information
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0 string \x20\x20\x20\x20\x20\x20\x20\x20-:\x20\x20\x20\ 0:Source:
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>&0 search/128 \x20\x20\x20\x20\x20\x20\x20\x20-:\x20\x20\x20\ 0:Graph:
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>>&0 search/128 \x20\x20\x20\x20\x20\x20\x20\x20-:\x20\x20\x20\ 0:Data: GCOV coverage report
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# LLVM coverage files
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# raw data after running a program compiled with:
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# `clang -fprofile-instr-generate -fcoverage-mapping ...`
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# default name: default.profraw
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# magic is: \xFF lprofr \x81
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# cf. https://llvm.org/docs/doxygen/html/InstrProfData_8inc_source.html
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0 lequad 0xff6c70726f667281 LLVM raw profile data,
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>&0 byte x version %d
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# big endian
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0 bequad 0xff6c70726f667281 LLVM raw profile data,
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>&7 byte x version %d (big-endian)
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# LLVM indexed instruction profile (as generated by llvm-profdata)
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# magic is: reverse(\xFF lprofi \x81)
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# cf. https://llvm.org/docs/CoverageMappingFormat.html
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# https://llvm.org/docs/doxygen/html/namespacellvm_1_1IndexedInstrProf.html
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# https://llvm.org/docs/CommandGuide/llvm-cov.html
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# https://llvm.org/docs/CommandGuide/llvm-profdata.html
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0 lequad 0x8169666f72706cff LLVM indexed profile data,
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>&0 byte x version %d
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# big endian
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0 bequad 0x8169666f72706cff LLVM indexed profile data,
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>&7 byte x version %d (big-endian)
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