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    1 
    2 #------------------------------------------------------------------------------
    3 # $File: coverage,v 1.1 2016/06/05 00:26:32 christos Exp $
    4 # xoverage:  file(1) magic for test coverage data
    5 
    6 # File formats used to store test coverage data
    7 # 2016-05-21, Georg Sauthoff <mail@georg.so>
    8 
    9 
   10 # - GCC gcno - written by GCC at compile time when compiling with
   11 # 	gcc -ftest-coverage
   12 # - GCC gcda - written by a program that was compiled with
   13 #	gcc -fprofile-arcs
   14 # - LLVM raw profiles - generated by a program compiled with
   15 #	clang -fprofile-instr-generate -fcoverage-mapping ...
   16 # - LLVM indexed profiles - generated by
   17 #	llvm-profdata
   18 # - GCOV reports, i.e. the annotated source code
   19 # - LCOV trace files, i.e. aggregated GCC profiles
   20 #
   21 # GCC coverage tracefiles
   22 # .gcno file are created during compile time,
   23 # while data collected during runtime is stored in .gcda files
   24 # cf. gcov-io.h
   25 # https://gcc.gnu.org/onlinedocs/gcc-5.3.0/gcc/Gcov-Data-Files.html
   26 # Examples:
   27 # Fedora 23/x86-64/gcc-5.3.1: 6f 6e 63 67 52 33 30 35
   28 # Debian 8 PPC64/gcc-4.9.2  : 67 63 6e 6f 34 30 39 2a
   29 0	lelong	0x67636e6f	GCC gcno coverage (-ftest-coverage),
   30 >&3	byte	x	version %c.
   31 >&1	byte	x	\b%c
   32 
   33 # big endian
   34 0	belong	0x67636e6f	GCC gcno coverage (-ftest-coverage),
   35 >&0	byte	x	version %c.
   36 >&2	byte	x	\b%c (big-endian)
   37 
   38 # Examples:
   39 # Fedora 23/x86-64/gcc-5.3.1: 61 64 63 67 52 33 30 35
   40 # Debian 8 PPC64/gcc-4.9.2  : 67 63 64 61 34 30 39 2a
   41 0	lelong	0x67636461	GCC gcda coverage (-fprofile-arcs),
   42 >&3	byte	x	version %c.
   43 >&1	byte	x	\b%c
   44 
   45 # big endian
   46 0	belong	0x67636461	GCC gcda coverage (-fprofile-arcs),
   47 >&0	byte	x	version %c.
   48 >&2	byte	x	\b%c (big-endian)
   49 
   50 
   51 # LCOV tracefiles
   52 # cf. http://ltp.sourceforge.net/coverage/lcov/geninfo.1.php
   53 0	string	TN:
   54 >&0	search/64	\nSF:/	LCOV coverage tracefile
   55 
   56 
   57 # Coverage reports generated by gcov
   58 # i.e. source code annoted with coverage information
   59 0	string	\x20\x20\x20\x20\x20\x20\x20\x20-:\x20\x20\x20\ 0:Source:
   60 >&0	search/128	\x20\x20\x20\x20\x20\x20\x20\x20-:\x20\x20\x20\ 0:Graph:
   61 >>&0	search/128	\x20\x20\x20\x20\x20\x20\x20\x20-:\x20\x20\x20\ 0:Data:	GCOV coverage report
   62 
   63 
   64 # LLVM coverage files
   65 
   66 # raw data after running a program compiled with:
   67 # `clang -fprofile-instr-generate -fcoverage-mapping ...`
   68 # default name: default.profraw
   69 # magic is: \xFF lprofr \x81
   70 # cf. http://llvm.org/docs/doxygen/html/InstrProfData_8inc_source.html
   71 0	lequad	0xff6c70726f667281	LLVM raw profile data,
   72 >&0	byte	x	version %d
   73 
   74 # big endian
   75 0	bequad	0xff6c70726f667281	LLVM raw profile data,
   76 >&7	byte	x	version %d (big-endian)
   77 
   78 
   79 # LLVM indexed instruction profile (as generated by llvm-profdata)
   80 # magic is: reverse(\xFF lprofi \x81)
   81 # cf. http://llvm.org/docs/CoverageMappingFormat.html
   82 # http://llvm.org/docs/doxygen/html/namespacellvm_1_1IndexedInstrProf.html
   83 # http://llvm.org/docs/CommandGuide/llvm-cov.html
   84 # http://llvm.org/docs/CommandGuide/llvm-profdata.html
   85 0	lequad	0x8169666f72706cff	LLVM indexed profile data,
   86 >&0	byte	x	version %d
   87 
   88 # big endian
   89 0	bequad	0x8169666f72706cff	LLVM indexed profile data,
   90 >&7	byte	x	version %d (big-endian)
   91