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#------------------------------------------------------------------------------
# $File: coverage,v 1.3 2021/02/23 00:51:10 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 annotated 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. https://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. https://llvm.org/docs/CoverageMappingFormat.html
# https://llvm.org/docs/doxygen/html/namespacellvm_1_1IndexedInstrProf.html
# https://llvm.org/docs/CommandGuide/llvm-cov.html
# https://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)
|
