Date: Mon, 27 Apr 2020 21:19:46 +0000 (UTC) From: John Baldwin <jhb@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r360393 - stable/12/tests/sys/kern Message-ID: <202004272119.03RLJkBt081750@repo.freebsd.org>
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Author: jhb Date: Mon Apr 27 21:19:46 2020 New Revision: 360393 URL: https://svnweb.freebsd.org/changeset/base/360393 Log: MFC 350014: Add a test for PT_GET_SC_ARGS. Modified: stable/12/tests/sys/kern/ptrace_test.c Directory Properties: stable/12/ (props changed) Modified: stable/12/tests/sys/kern/ptrace_test.c ============================================================================== --- stable/12/tests/sys/kern/ptrace_test.c Mon Apr 27 20:37:11 2020 (r360392) +++ stable/12/tests/sys/kern/ptrace_test.c Mon Apr 27 21:19:46 2020 (r360393) @@ -3927,6 +3927,86 @@ ATF_TC_BODY(ptrace__PT_LWPINFO_stale_siginfo, tc) } /* + * 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); +} + +/* * Verify that when the process is traced that it isn't reparent * to the init process when we close all process descriptors. */ @@ -4041,6 +4121,7 @@ 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); ATF_TP_ADD_TC(tp, ptrace__proc_reparent); return (atf_no_error());
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