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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug gcov-profile/101773] errors when writing to .gcda file are not
 checked
Date: Wed, 04 Aug 2021 14:09:25 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D101773

Martin Li=C5=A1ka <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |WAITING

--- Comment #5 from Martin Li=C5=A1ka <marxin at gcc dot gnu.org> ---
(In reply to Vincent Lef=C3=A8vre from comment #4)
> GCOV_EXIT_AT_ERROR is not documented in the man page.

But we document that in GCC user manual.

>=20
> Anyway, it doesn't seem to work:
>=20
> $ export GCOV_EXIT_AT_ERROR=3D1
> $ printenv GCOV_EXIT_AT_ERROR
> 1
> $ gcc-test -O -fprofile-generate=3Ddir tst.c
> $ ./a.out
> $ echo $?
> 0
> $ ls -l dir/*.gcda
> -rw-r--r-- 1 vlefevre vlefevre 0 2021-08-04 14:48:01
> dir/#home#vlefevre#a-tst.gcda

It works for me:

$ gcc --version
gcc (GCC) 12.0.0 20210804 (experimental)

$ df -h /tmp/ramdisk
Filesystem      Size  Used Avail Use% Mounted on
tmpfs           4.0K  4.0K     0 100% /tmp/ramdisk

$ g++ ~/Programming/tramp3d/tramp3d-v4.ii -fprofile-generate=3D/tmp/ramdisk
$ GCOV_EXIT_AT_ERROR=3D1 ./a.out -n 0
...
libgcov profiling
error:/tmp/ramdisk/#home#marxin#Programming#testcases#a-tramp3d-v4.gcda:Err=
or
writing
profiling:exiting after an error
$ echo $?
1

$ ./a.out -n 0
...
libgcov profiling
error:/tmp/ramdisk/#home#marxin#Programming#testcases#a-tramp3d-v4.gcda:Err=
or
writing
echo $?
0=