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Add a test for user signal delivery.

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This test verifies we get the correct ptrace event details when a signal
is posted to a traced process from userland.

Reviewed by:	kib (part of D7044)
This commit is contained in:
jhb 2016-07-15 15:28:33 +00:00
parent 35927cc862
commit b9ba852216
1 changed files with 62 additions and 0 deletions
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62
tests/sys/kern/ptrace_test.c
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@ -1355,6 +1355,67 @@ ATF_TC_BODY(ptrace__lwp_events_exec, tc)
ATF_REQUIRE(errno == ECHILD);
}
static void
handler(int sig __unused)
{
}
static void
signal_main(void)
{
signal(SIGINFO, handler);
raise(SIGINFO);
exit(0);
}
/*
* Verify that the expected ptrace event is reported for a signal.
*/
ATF_TC_WITHOUT_HEAD(ptrace__siginfo);
ATF_TC_BODY(ptrace__siginfo, tc)
{
struct ptrace_lwpinfo pl;
pid_t fpid, wpid;
int status;
ATF_REQUIRE((fpid = fork()) != -1);
if (fpid == 0) {
trace_me();
signal_main();
}
/* The first wait() should report the stop from SIGSTOP. */
wpid = waitpid(fpid, &status, 0);
ATF_REQUIRE(wpid == fpid);
ATF_REQUIRE(WIFSTOPPED(status));
ATF_REQUIRE(WSTOPSIG(status) == SIGSTOP);
ATF_REQUIRE(ptrace(PT_CONTINUE, fpid, (caddr_t)1, 0) == 0);
/* The next event should be for the SIGINFO. */
wpid = waitpid(fpid, &status, 0);
ATF_REQUIRE(WIFSTOPPED(status));
ATF_REQUIRE(WSTOPSIG(status) == SIGINFO);
ATF_REQUIRE(ptrace(PT_LWPINFO, wpid, (caddr_t)&pl, sizeof(pl)) != -1);
ATF_REQUIRE(pl.pl_event == PL_EVENT_SIGNAL);
ATF_REQUIRE(pl.pl_flags & PL_FLAG_SI);
ATF_REQUIRE(pl.pl_siginfo.si_code == SI_LWP);
ATF_REQUIRE(pl.pl_siginfo.si_pid == wpid);
ATF_REQUIRE(ptrace(PT_CONTINUE, fpid, (caddr_t)1, 0) == 0);
/* The last event should be for the child process's exit. */
wpid = waitpid(fpid, &status, 0);
ATF_REQUIRE(WIFEXITED(status));
ATF_REQUIRE(WEXITSTATUS(status) == 0);
wpid = wait(&status);
ATF_REQUIRE(wpid == -1);
ATF_REQUIRE(errno == ECHILD);
}
ATF_TP_ADD_TCS(tp)
{
@ -1376,6 +1437,7 @@ ATF_TP_ADD_TCS(tp)
ATF_TP_ADD_TC(tp, ptrace__new_child_pl_syscall_code_thread);
ATF_TP_ADD_TC(tp, ptrace__lwp_events);
ATF_TP_ADD_TC(tp, ptrace__lwp_events_exec);
ATF_TP_ADD_TC(tp, ptrace__siginfo);
return (atf_no_error());
}