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Add a test for PT_GET_SC_ARGS.

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Reviewed by:	kib
MFC after:	1 month
Sponsored by:	DARPA
Differential Revision:	https://reviews.freebsd.org/D20899
This commit is contained in:
jhb 2019-07-15 21:26:55 +00:00
parent 895d57ec60
commit 64ee41ff55
1 changed files with 81 additions and 0 deletions
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81
tests/sys/kern/ptrace_test.c
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@ -3904,6 +3904,86 @@ ATF_TC_BODY(ptrace__PT_LWPINFO_stale_siginfo, tc)
ATF_REQUIRE(errno == ECHILD);
}
/*
* A simple test of PT_GET_SC_ARGS.
*/
ATF_TC_WITHOUT_HEAD(ptrace__syscall_args);
ATF_TC_BODY(ptrace__syscall_args, tc)
{
struct ptrace_lwpinfo pl;
pid_t fpid, wpid;
register_t args[2];
int events, status;
ATF_REQUIRE((fpid = fork()) != -1);
if (fpid == 0) {
trace_me();
kill(getpid(), 0);
exit(1);
}
/* 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);
/*
* Continue the process ignoring the signal, but enabling
* syscall entry traps.
*/
ATF_REQUIRE(ptrace(PT_TO_SCE, fpid, (caddr_t)1, 0) == 0);
/*
* The next stop should be the syscall entry from getpid().
*/
wpid = waitpid(fpid, &status, 0);
ATF_REQUIRE(wpid == fpid);
ATF_REQUIRE(WIFSTOPPED(status));
ATF_REQUIRE(WSTOPSIG(status) == SIGTRAP);
ATF_REQUIRE(ptrace(PT_LWPINFO, wpid, (caddr_t)&pl, sizeof(pl)) != -1);
ATF_REQUIRE(pl.pl_flags & PL_FLAG_SCE);
ATF_REQUIRE(pl.pl_syscall_code == SYS_getpid);
ATF_REQUIRE(ptrace(PT_CONTINUE, fpid, (caddr_t)1, 0) == 0);
/*
* The next stop should be the syscall entry from kill().
*/
wpid = waitpid(fpid, &status, 0);
ATF_REQUIRE(wpid == fpid);
ATF_REQUIRE(WIFSTOPPED(status));
ATF_REQUIRE(WSTOPSIG(status) == SIGTRAP);
ATF_REQUIRE(ptrace(PT_LWPINFO, wpid, (caddr_t)&pl, sizeof(pl)) != -1);
ATF_REQUIRE(pl.pl_flags & PL_FLAG_SCE);
ATF_REQUIRE(pl.pl_syscall_code == SYS_kill);
ATF_REQUIRE(pl.pl_syscall_narg == 2);
ATF_REQUIRE(ptrace(PT_GET_SC_ARGS, wpid, (caddr_t)args,
sizeof(args)) != -1);
ATF_REQUIRE(args[0] == wpid);
ATF_REQUIRE(args[1] == 0);
/* Disable syscall tracing and continue the child to let it exit. */
ATF_REQUIRE(ptrace(PT_GET_EVENT_MASK, fpid, (caddr_t)&events,
sizeof(events)) == 0);
events &= ~PTRACE_SYSCALL;
ATF_REQUIRE(ptrace(PT_SET_EVENT_MASK, fpid, (caddr_t)&events,
sizeof(events)) == 0);
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) == 1);
wpid = wait(&status);
ATF_REQUIRE(wpid == -1);
ATF_REQUIRE(errno == ECHILD);
}
ATF_TP_ADD_TCS(tp)
{
@ -3965,6 +4045,7 @@ ATF_TP_ADD_TCS(tp)
ATF_TP_ADD_TC(tp, ptrace__PT_CONTINUE_different_thread);
#endif
ATF_TP_ADD_TC(tp, ptrace__PT_LWPINFO_stale_siginfo);
ATF_TP_ADD_TC(tp, ptrace__syscall_args);
return (atf_no_error());
}