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ptrace_test: add test for the PT_ATTACH behavior on sleeping thread

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Reviewed by:	markj
Sponsored by:	The FreeBSD Foundation
MFC after:	2 weeks
Differential revision:	https://reviews.freebsd.org/D49887
This commit is contained in:
Konstantin Belousov 2025-04-18 15:20:20 +03:00
parent fb2ea26f3c
commit ed080d9915
1 changed files with 61 additions and 0 deletions
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61
tests/sys/kern/ptrace_test.c
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@ -28,6 +28,7 @@
#include <sys/elf.h>
#include <sys/event.h>
#include <sys/file.h>
#include <sys/mman.h>
#include <sys/time.h>
#include <sys/procctl.h>
#include <sys/procdesc.h>
@ -4464,6 +4465,65 @@ ATF_TC_BODY(ptrace__reap_kill_stopped, tc)
REQUIRE_EQ(-1, prk.rk_fpid);
}
struct child_res {
struct timespec sleep_time;
int nanosleep_res;
int nanosleep_errno;
};
static const long nsec = 1000000000L;
static const struct timespec ten_sec = {
.tv_sec = 10,
.tv_nsec = 0,
};
static const struct timespec twelve_sec = {
.tv_sec = 12,
.tv_nsec = 0,
};
ATF_TC_WITHOUT_HEAD(ptrace__PT_ATTACH_no_EINTR);
ATF_TC_BODY(ptrace__PT_ATTACH_no_EINTR, tc)
{
struct child_res *shm;
struct timespec rqt, now, wake;
pid_t debuggee;
int status;
shm = mmap(NULL, sizeof(*shm), PROT_READ | PROT_WRITE,
MAP_SHARED | MAP_ANON, -1, 0);
ATF_REQUIRE(shm != MAP_FAILED);
ATF_REQUIRE((debuggee = fork()) != -1);
if (debuggee == 0) {
rqt.tv_sec = 10;
rqt.tv_nsec = 0;
clock_gettime(CLOCK_MONOTONIC_PRECISE, &now);
errno = 0;
shm->nanosleep_res = nanosleep(&rqt, NULL);
shm->nanosleep_errno = errno;
clock_gettime(CLOCK_MONOTONIC_PRECISE, &wake);
timespecsub(&wake, &now, &shm->sleep_time);
_exit(0);
}
/* Give the debuggee some time to go to sleep. */
sleep(2);
REQUIRE_EQ(ptrace(PT_ATTACH, debuggee, 0, 0), 0);
REQUIRE_EQ(waitpid(debuggee, &status, 0), debuggee);
ATF_REQUIRE(WIFSTOPPED(status));
REQUIRE_EQ(WSTOPSIG(status), SIGSTOP);
REQUIRE_EQ(ptrace(PT_DETACH, debuggee, 0, 0), 0);
REQUIRE_EQ(waitpid(debuggee, &status, 0), debuggee);
ATF_REQUIRE(WIFEXITED(status));
REQUIRE_EQ(WEXITSTATUS(status), 0);
ATF_REQUIRE(shm->nanosleep_res == 0);
ATF_REQUIRE(shm->nanosleep_errno == 0);
ATF_REQUIRE(timespeccmp(&shm->sleep_time, &ten_sec, >=));
ATF_REQUIRE(timespeccmp(&shm->sleep_time, &twelve_sec, <=));
}
ATF_TP_ADD_TCS(tp)
{
ATF_TP_ADD_TC(tp, ptrace__parent_wait_after_trace_me);
@ -4532,6 +4592,7 @@ ATF_TP_ADD_TCS(tp)
ATF_TP_ADD_TC(tp, ptrace__procdesc_reparent_wait_child);
ATF_TP_ADD_TC(tp, ptrace__PT_SC_REMOTE_getpid);
ATF_TP_ADD_TC(tp, ptrace__reap_kill_stopped);
ATF_TP_ADD_TC(tp, ptrace__PT_ATTACH_no_EINTR);
return (atf_no_error());
}