git: ed080d991586 - main - ptrace_test: add test for the PT_ATTACH behavior on sleeping thread
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Date: Fri, 18 Apr 2025 15:33:19 UTC
The branch main has been updated by kib: URL: https://cgit.FreeBSD.org/src/commit/?id=ed080d9915869708a9ab7badc217aff17ebbef6c commit ed080d9915869708a9ab7badc217aff17ebbef6c Author: Konstantin Belousov <kib@FreeBSD.org> AuthorDate: 2025-04-18 12:20:20 +0000 Commit: Konstantin Belousov <kib@FreeBSD.org> CommitDate: 2025-04-18 15:33:12 +0000 ptrace_test: add test for the PT_ATTACH behavior on sleeping thread Reviewed by: markj Sponsored by: The FreeBSD Foundation MFC after: 2 weeks Differential revision: https://reviews.freebsd.org/D49887 --- tests/sys/kern/ptrace_test.c | 61 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+) diff --git a/tests/sys/kern/ptrace_test.c b/tests/sys/kern/ptrace_test.c index de411af6bc40..5dc235eb9200 100644 --- a/tests/sys/kern/ptrace_test.c +++ b/tests/sys/kern/ptrace_test.c @@ -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()); }