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ptrace_test: add test for expanded reporting of syscall args

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(cherry picked from commit 526becbf6e42331e3680d55fe1e9a82e1b56a735)
This commit is contained in:
Konstantin Belousov 2025-03-24 04:44:38 +02:00
parent fdbf48835d
commit ca3222c4fc
1 changed files with 48 additions and 0 deletions
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48
tests/sys/kern/ptrace_test.c
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@ -4161,6 +4161,53 @@ ATF_TC_BODY(ptrace__syscall_args, tc)
REQUIRE_EQ(errno, ECHILD);
}
/*
* Check that syscall info is available whenever kernel has valid td_sa.
* Assumes that libc nanosleep(2) is the plain syscall wrapper.
*/
ATF_TC_WITHOUT_HEAD(ptrace__syscall_args_anywhere);
ATF_TC_BODY(ptrace__syscall_args_anywhere, tc)
{
struct timespec rqt;
struct ptrace_lwpinfo lwpi;
register_t args[8];
pid_t debuggee, wpid;
int error, status;
debuggee = fork();
ATF_REQUIRE(debuggee >= 0);
if (debuggee == 0) {
rqt.tv_sec = 100000;
rqt.tv_nsec = 0;
for (;;)
nanosleep(&rqt, NULL);
_exit(0);
}
/* Give the debuggee some time to go to sleep. */
sleep(2);
error = ptrace(PT_ATTACH, debuggee, 0, 0);
ATF_REQUIRE(error == 0);
wpid = waitpid(debuggee, &status, 0);
REQUIRE_EQ(wpid, debuggee);
ATF_REQUIRE(WIFSTOPPED(status));
REQUIRE_EQ(WSTOPSIG(status), SIGSTOP);
error = ptrace(PT_LWPINFO, debuggee, (caddr_t)&lwpi, sizeof(lwpi));
ATF_REQUIRE(error == 0);
ATF_REQUIRE(lwpi.pl_syscall_code == SYS_nanosleep);
ATF_REQUIRE(lwpi.pl_syscall_narg == 2);
error = ptrace(PT_GET_SC_ARGS, debuggee, (caddr_t)&args[0],
lwpi.pl_syscall_narg * sizeof(register_t));
ATF_REQUIRE(error == 0);
ATF_REQUIRE(args[0] == (register_t)&rqt);
ATF_REQUIRE(args[1] == 0);
error = ptrace(PT_DETACH, debuggee, 0, 0);
ATF_REQUIRE(error == 0);
kill(SIGKILL, debuggee);
}
/*
* Verify that when the process is traced that it isn't reparent
* to the init process when we close all process descriptors.
@ -4477,6 +4524,7 @@ ATF_TP_ADD_TCS(tp)
#endif
ATF_TP_ADD_TC(tp, ptrace__PT_LWPINFO_stale_siginfo);
ATF_TP_ADD_TC(tp, ptrace__syscall_args);
ATF_TP_ADD_TC(tp, ptrace__syscall_args_anywhere);
ATF_TP_ADD_TC(tp, ptrace__proc_reparent);
ATF_TP_ADD_TC(tp, ptrace__procdesc_wait_child);
ATF_TP_ADD_TC(tp, ptrace__procdesc_reparent_wait_child);