From 819c27507466a0dcd836d7deebe0775b8f3f5e96 Mon Sep 17 00:00:00 2001 From: Evan Benn Date: Fri, 4 Nov 2022 17:00:40 +1100 Subject: tests: Detect llvm coverage run and redirect to real I/O functions Code coverage writes data to disk, we need to use real io functions at this point so that the data is really written. BUG=b:187647884 BRANCH=None TEST=llvm-profdata merge -sparse default.profraw -o default.profdata TEST=llvm-cov show ./flashrom_unit_tests -instr-profile=default.profdata --format=html --output-dir=. Change-Id: I21cc1d631e92fa19006b967e85676f108e80b307 Signed-off-by: Evan Benn Reviewed-on: https://review.coreboot.org/c/flashrom/+/69267 Reviewed-by: Anastasia Klimchuk Tested-by: build bot (Jenkins) --- Documentation/building.md | 11 +++++++++++ tests/io_real.c | 17 ++++++++++++++++- tests/tests.c | 2 ++ tests/wraps.h | 2 ++ 4 files changed, 31 insertions(+), 1 deletion(-) diff --git a/Documentation/building.md b/Documentation/building.md index 81daeb06..e25482e5 100644 --- a/Documentation/building.md +++ b/Documentation/building.md @@ -60,6 +60,17 @@ ninja -C buildcov test ninja -C buildcov coverage ``` +#### llvm +https://clang.llvm.org/docs/SourceBasedCodeCoverage.html +``` +env CFLAGS="-fprofile-instr-generate -fcoverage-mapping" CC=clang meson setup buildclangcov +env LLVM_PROFILE_FILE=default.profraw ninja -C buildclangcov test +cd buildclangcov +llvm-profdata merge -sparse default.profraw -o default.profdata +llvm-cov show ./flashrom_unit_tests -instr-profile=default.profdata --format=html --output-dir=. +open index.html +``` + ## System specific information ### Ubuntu / Debian (Linux) * __linux-headers__ are version specific diff --git a/tests/io_real.c b/tests/io_real.c index 9f9e9d6d..429027fb 100644 --- a/tests/io_real.c +++ b/tests/io_real.c @@ -25,6 +25,12 @@ static int io_real_open(void *state, const char *pathname, int flags, mode_t mod return __real_open(pathname, flags, mode); } +static FILE *io_real_fopen(void *state, const char *pathname, const char *mode) +{ + LOG_ME; + return __real_fopen(pathname, mode); +} + static FILE *io_real_fdopen(void *state, int fd, const char *mode) { LOG_ME; @@ -36,13 +42,21 @@ static size_t io_real_fwrite(void *state, const void *ptr, size_t size, size_t n return __real_fwrite(ptr, size, nmemb, fp); } +static int io_real_fclose(void *state, FILE *fp) +{ + LOG_ME; + return __real_fclose(fp); +} + /* Mock ios that defer to the real io functions. * These exist so that code coverage can print to real files on disk. */ static const struct io_mock real_io = { .iom_open = io_real_open, + .iom_fopen = io_real_fopen, .iom_fwrite = io_real_fwrite, .iom_fdopen = io_real_fdopen, + .iom_fclose = io_real_fclose, }; /* Return 0 if string ends with suffix. */ @@ -58,6 +72,7 @@ static int check_suffix(const char *string, const char *suffix) void maybe_unmock_io(const char *pathname) { const char *gcov_suffix = ".gcda"; - if (!check_suffix(pathname, gcov_suffix)) + const char *llvm_cov_suffix = ".profraw"; + if (!check_suffix(pathname, gcov_suffix) || !check_suffix(pathname, llvm_cov_suffix)) io_mock_register(&real_io); } diff --git a/tests/tests.c b/tests/tests.c index b11f6421..a1dcacae 100644 --- a/tests/tests.c +++ b/tests/tests.c @@ -170,6 +170,7 @@ int __wrap_read(int fd, void *buf, size_t sz) FILE *__wrap_fopen(const char *pathname, const char *mode) { LOG_ME; + maybe_unmock_io(pathname); if (get_io() && get_io()->iom_fopen) return get_io()->iom_fopen(get_io()->state, pathname, mode); return not_null(); @@ -178,6 +179,7 @@ FILE *__wrap_fopen(const char *pathname, const char *mode) FILE *__wrap_fopen64(const char *pathname, const char *mode) { LOG_ME; + maybe_unmock_io(pathname); if (get_io() && get_io()->iom_fopen) return get_io()->iom_fopen(get_io()->state, pathname, mode); return not_null(); diff --git a/tests/wraps.h b/tests/wraps.h index 92b0c42c..6cc95677 100644 --- a/tests/wraps.h +++ b/tests/wraps.h @@ -36,6 +36,7 @@ int __wrap_ioctl(int fd, unsigned long int request, ...); int __wrap_write(int fd, const void *buf, size_t sz); int __wrap_read(int fd, void *buf, size_t sz); FILE *__wrap_fopen(const char *pathname, const char *mode); +FILE *__real_fopen(const char *pathname, const char *mode); FILE *__wrap_fopen64(const char *pathname, const char *mode); FILE *__wrap_fdopen(int fd, const char *mode); FILE *__real_fdopen(int fd, const char *mode); @@ -59,6 +60,7 @@ int __wrap_setvbuf(FILE *fp, char *buf, int type, size_t size); int __wrap_fprintf(FILE *fp, const char *fmt, ...); int __wrap___vfprintf_chk(FILE *fp, const char *fmt, va_list args); int __wrap_fclose(FILE *fp); +int __real_fclose(FILE *fp); int __wrap_feof(FILE *fp); int __wrap_ferror(FILE *fp); void __wrap_clearerr(FILE *fp); -- cgit v1.2.3