#------------------------------------------------------------------------------ # $File: coverage,v 1.1 2016/06/05 00:26:32 christos Exp $ # xoverage: file(1) magic for test coverage data # File formats used to store test coverage data # 2016-05-21, Georg Sauthoff <mail@georg.so> # - GCC gcno - written by GCC at compile time when compiling with # gcc -ftest-coverage # - GCC gcda - written by a program that was compiled with # gcc -fprofile-arcs # - LLVM raw profiles - generated by a program compiled with # clang -fprofile-instr-generate -fcoverage-mapping ... # - LLVM indexed profiles - generated by # llvm-profdata # - GCOV reports, i.e. the annotated source code # - LCOV trace files, i.e. aggregated GCC profiles # # GCC coverage tracefiles # .gcno file are created during compile time, # while data collected during runtime is stored in .gcda files # cf. gcov-io.h # https://gcc.gnu.org/onlinedocs/gcc-5.3.0/gcc/Gcov-Data-Files.html # Examples: # Fedora 23/x86-64/gcc-5.3.1: 6f 6e 63 67 52 33 30 35 # Debian 8 PPC64/gcc-4.9.2 : 67 63 6e 6f 34 30 39 2a 0 lelong 0x67636e6f GCC gcno coverage (-ftest-coverage), >&3 byte x version %c. >&1 byte x \b%c # big endian 0 belong 0x67636e6f GCC gcno coverage (-ftest-coverage), >&0 byte x version %c. >&2 byte x \b%c (big-endian) # Examples: # Fedora 23/x86-64/gcc-5.3.1: 61 64 63 67 52 33 30 35 # Debian 8 PPC64/gcc-4.9.2 : 67 63 64 61 34 30 39 2a 0 lelong 0x67636461 GCC gcda coverage (-fprofile-arcs), >&3 byte x version %c. >&1 byte x \b%c # big endian 0 belong 0x67636461 GCC gcda coverage (-fprofile-arcs), >&0 byte x version %c. >&2 byte x \b%c (big-endian) # LCOV tracefiles # cf. http://ltp.sourceforge.net/coverage/lcov/geninfo.1.php 0 string TN: >&0 search/64 \nSF:/ LCOV coverage tracefile # Coverage reports generated by gcov # i.e. source code annoted with coverage information 0 string \x20\x20\x20\x20\x20\x20\x20\x20-:\x20\x20\x20\ 0:Source: >&0 search/128 \x20\x20\x20\x20\x20\x20\x20\x20-:\x20\x20\x20\ 0:Graph: >>&0 search/128 \x20\x20\x20\x20\x20\x20\x20\x20-:\x20\x20\x20\ 0:Data: GCOV coverage report # LLVM coverage files # raw data after running a program compiled with: # `clang -fprofile-instr-generate -fcoverage-mapping ...` # default name: default.profraw # magic is: \xFF lprofr \x81 # cf. http://llvm.org/docs/doxygen/html/InstrProfData_8inc_source.html 0 lequad 0xff6c70726f667281 LLVM raw profile data, >&0 byte x version %d # big endian 0 bequad 0xff6c70726f667281 LLVM raw profile data, >&7 byte x version %d (big-endian) # LLVM indexed instruction profile (as generated by llvm-profdata) # magic is: reverse(\xFF lprofi \x81) # cf. http://llvm.org/docs/CoverageMappingFormat.html # http://llvm.org/docs/doxygen/html/namespacellvm_1_1IndexedInstrProf.html # http://llvm.org/docs/CommandGuide/llvm-cov.html # http://llvm.org/docs/CommandGuide/llvm-profdata.html 0 lequad 0x8169666f72706cff LLVM indexed profile data, >&0 byte x version %d # big endian 0 bequad 0x8169666f72706cff LLVM indexed profile data, >&7 byte x version %d (big-endian)