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https://github.com/morgan9e/systemd
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4388541237
gcov provides wrappers for the exec*() calls but there's none for execveat(), which means we lose all coverage prior to the call. To mitigate this, let's add a simple execveat() wrapper in gcov's style[0], which dumps and resets the coverage data when needed. This applies only when we're built with -Dfexecve=true. [0] https://gcc.gnu.org/git/?p=gcc.git;a=blob;f=libgcc/libgcov-interface.c;h=b2ee930864183b78c8826255183ca86e15e21ded;hb=HEAD
48 lines
1.6 KiB
C
48 lines
1.6 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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#pragma once
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extern void __gcov_dump(void);
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extern void __gcov_reset(void);
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/* When built with --coverage (gcov) we need to explicitly call __gcov_dump()
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* in places where we use _exit(), since _exit() skips at-exit hooks resulting
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* in lost coverage.
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*
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* To make sure we don't miss any _exit() calls, this header file is included
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* explicitly on the compiler command line via the -include directive (only
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* when built with -Db_coverage=true)
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*/
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extern void _exit(int);
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static inline _Noreturn void _coverage__exit(int status) {
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__gcov_dump();
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_exit(status);
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}
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#define _exit(x) _coverage__exit(x)
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/* gcov provides wrappers for the exec*() calls but there's none for execveat(),
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* which means we lose all coverage prior to the call. To mitigate this, let's
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* add a simple execveat() wrapper in gcov's style[0], which dumps and resets
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* the coverage data when needed.
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*
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* This applies only when we're built with -Dfexecve=true.
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*
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* [0] https://gcc.gnu.org/git/?p=gcc.git;a=blob;f=libgcc/libgcov-interface.c;h=b2ee930864183b78c8826255183ca86e15e21ded;hb=HEAD
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*/
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extern int execveat(int, const char *, char * const [], char * const [], int);
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static inline int _coverage_execveat(
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int dirfd,
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const char *pathname,
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char * const argv[],
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char * const envp[],
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int flags) {
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__gcov_dump();
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int r = execveat(dirfd, pathname, argv, envp, flags);
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__gcov_reset();
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return r;
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}
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#define execveat(d,p,a,e,f) _coverage_execveat(d, p, a, e, f)
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