diff options
| -rw-r--r-- | executor/executor_linux.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/executor/executor_linux.h b/executor/executor_linux.h index 73005877d..63c900c5a 100644 --- a/executor/executor_linux.h +++ b/executor/executor_linux.h @@ -73,7 +73,13 @@ static intptr_t execute_syscall(const call_t* c, intptr_t a[kMaxArgs]) { if (c->call) return c->call(a[0], a[1], a[2], a[3], a[4], a[5], a[6], a[7], a[8]); - return syscall(c->sys_nr, a[0], a[1], a[2], a[3], a[4], a[5]); + intptr_t res = syscall(c->sys_nr, a[0], a[1], a[2], a[3], a[4], a[5]); + // Some prctl commands don't respect the normal convention for return values + // (e.g. PR_GET_TIMERSLACK, but there are more) and may produce all possible + // errno values. This conflicts with fallback coverage. + if (!flag_coverage && res == -1 && !strcmp(c->name, "prctl")) + errno = EINVAL; + return res; } static void cover_open(cover_t* cov, bool extra) |