diff options
Diffstat (limited to 'tests/sys/kern/ptrace_test.c')
| -rw-r--r-- | tests/sys/kern/ptrace_test.c | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/tests/sys/kern/ptrace_test.c b/tests/sys/kern/ptrace_test.c index be978edf06d4..dede0f84f4aa 100644 --- a/tests/sys/kern/ptrace_test.c +++ b/tests/sys/kern/ptrace_test.c @@ -1549,6 +1549,130 @@ ATF_TC_BODY(ptrace__event_mask, tc) ATF_REQUIRE(errno == ECHILD); } +/* + * Verify that the expected ptrace events are reported for PTRACE_VFORK. + */ +ATF_TC_WITHOUT_HEAD(ptrace__ptrace_vfork); +ATF_TC_BODY(ptrace__ptrace_vfork, tc) +{ + struct ptrace_lwpinfo pl; + pid_t fpid, wpid; + int events, status; + + ATF_REQUIRE((fpid = fork()) != -1); + if (fpid == 0) { + trace_me(); + follow_fork_parent(true); + } + + /* 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_GET_EVENT_MASK, fpid, (caddr_t)&events, + sizeof(events)) == 0); + events |= PTRACE_VFORK; + ATF_REQUIRE(ptrace(PT_SET_EVENT_MASK, fpid, (caddr_t)&events, + sizeof(events)) == 0); + + /* Continue the child ignoring the SIGSTOP. */ + ATF_REQUIRE(ptrace(PT_CONTINUE, fpid, (caddr_t)1, 0) != -1); + + /* The next event should report the end of the vfork. */ + wpid = wait(&status); + 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_VFORK_DONE) != 0); + + ATF_REQUIRE(ptrace(PT_CONTINUE, fpid, (caddr_t)1, 0) != -1); + + wpid = wait(&status); + ATF_REQUIRE(wpid == fpid); + ATF_REQUIRE(WIFEXITED(status)); + ATF_REQUIRE(WEXITSTATUS(status) == 1); + + wpid = wait(&status); + ATF_REQUIRE(wpid == -1); + ATF_REQUIRE(errno == ECHILD); +} + +ATF_TC_WITHOUT_HEAD(ptrace__ptrace_vfork_follow); +ATF_TC_BODY(ptrace__ptrace_vfork_follow, tc) +{ + struct ptrace_lwpinfo pl[2]; + pid_t children[2], fpid, wpid; + int events, status; + + ATF_REQUIRE((fpid = fork()) != -1); + if (fpid == 0) { + trace_me(); + follow_fork_parent(true); + } + + /* Parent process. */ + children[0] = fpid; + + /* The first wait() should report the stop from SIGSTOP. */ + wpid = waitpid(children[0], &status, 0); + ATF_REQUIRE(wpid == children[0]); + ATF_REQUIRE(WIFSTOPPED(status)); + ATF_REQUIRE(WSTOPSIG(status) == SIGSTOP); + + ATF_REQUIRE(ptrace(PT_GET_EVENT_MASK, children[0], (caddr_t)&events, + sizeof(events)) == 0); + events |= PTRACE_FORK | PTRACE_VFORK; + ATF_REQUIRE(ptrace(PT_SET_EVENT_MASK, children[0], (caddr_t)&events, + sizeof(events)) == 0); + + /* Continue the child ignoring the SIGSTOP. */ + ATF_REQUIRE(ptrace(PT_CONTINUE, children[0], (caddr_t)1, 0) != -1); + + /* Wait for both halves of the fork event to get reported. */ + children[1] = handle_fork_events(children[0], pl); + ATF_REQUIRE(children[1] > 0); + + ATF_REQUIRE((pl[0].pl_flags & PL_FLAG_VFORKED) != 0); + + ATF_REQUIRE(ptrace(PT_CONTINUE, children[0], (caddr_t)1, 0) != -1); + ATF_REQUIRE(ptrace(PT_CONTINUE, children[1], (caddr_t)1, 0) != -1); + + /* + * The child can't exit until the grandchild reports status, so the + * grandchild should report its exit first to the debugger. + */ + wpid = waitpid(children[1], &status, 0); + ATF_REQUIRE(wpid == children[1]); + ATF_REQUIRE(WIFEXITED(status)); + ATF_REQUIRE(WEXITSTATUS(status) == 2); + + /* + * The child should report it's vfork() completion before it + * exits. + */ + wpid = wait(&status); + ATF_REQUIRE(wpid == children[0]); + ATF_REQUIRE(WIFSTOPPED(status)); + ATF_REQUIRE(WSTOPSIG(status) == SIGTRAP); + ATF_REQUIRE(ptrace(PT_LWPINFO, wpid, (caddr_t)&pl[0], sizeof(pl[0])) != + -1); + ATF_REQUIRE((pl[0].pl_flags & PL_FLAG_VFORK_DONE) != 0); + + ATF_REQUIRE(ptrace(PT_CONTINUE, children[0], (caddr_t)1, 0) != -1); + + wpid = wait(&status); + ATF_REQUIRE(wpid == children[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) { @@ -1574,6 +1698,8 @@ ATF_TP_ADD_TCS(tp) ATF_TP_ADD_TC(tp, ptrace__ptrace_exec_disable); ATF_TP_ADD_TC(tp, ptrace__ptrace_exec_enable); ATF_TP_ADD_TC(tp, ptrace__event_mask); + ATF_TP_ADD_TC(tp, ptrace__ptrace_vfork); + ATF_TP_ADD_TC(tp, ptrace__ptrace_vfork_follow); return (atf_no_error()); } |