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Add a test for sending a signal while stepping a thread via PT_STEP.

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MFC after:	1 week
This commit is contained in:
John Baldwin 2017-10-25 17:23:33 +00:00
parent 4c52a9993b
commit 54cfb29e3a
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=324993
1 changed files with 87 additions and 0 deletions
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87
tests/sys/kern/ptrace_test.c
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@ -3377,6 +3377,92 @@ ATF_TC_BODY(ptrace__PT_ATTACH_with_SBDRY_thread, tc)
ATF_REQUIRE(close(fd) == 0);
}
static void
sigusr1_step_handler(int sig)
{
CHILD_REQUIRE(sig == SIGUSR1);
raise(SIGABRT);
}
/*
* Verify that PT_STEP with a signal invokes the signal before
* stepping the next instruction (and that the next instruction is
* stepped correctly).
*/
ATF_TC_WITHOUT_HEAD(ptrace__PT_STEP_with_signal);
ATF_TC_BODY(ptrace__PT_STEP_with_signal, tc)
{
struct ptrace_lwpinfo pl;
pid_t fpid, wpid;
int status;
ATF_REQUIRE((fpid = fork()) != -1);
if (fpid == 0) {
trace_me();
signal(SIGUSR1, sigusr1_step_handler);
raise(SIGABRT);
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);
ATF_REQUIRE(ptrace(PT_CONTINUE, fpid, (caddr_t)1, 0) == 0);
/* The next stop should report the SIGABRT in the child body. */
wpid = waitpid(fpid, &status, 0);
ATF_REQUIRE(wpid == fpid);
ATF_REQUIRE(WIFSTOPPED(status));
ATF_REQUIRE(WSTOPSIG(status) == SIGABRT);
ATF_REQUIRE(ptrace(PT_LWPINFO, wpid, (caddr_t)&pl, sizeof(pl)) != -1);
ATF_REQUIRE(pl.pl_flags & PL_FLAG_SI);
ATF_REQUIRE(pl.pl_siginfo.si_signo == SIGABRT);
/* Step the child process inserting SIGUSR1. */
ATF_REQUIRE(ptrace(PT_STEP, fpid, (caddr_t)1, SIGUSR1) == 0);
/* The next stop should report the SIGABRT in the signal handler. */
wpid = waitpid(fpid, &status, 0);
ATF_REQUIRE(wpid == fpid);
ATF_REQUIRE(WIFSTOPPED(status));
ATF_REQUIRE(WSTOPSIG(status) == SIGABRT);
ATF_REQUIRE(ptrace(PT_LWPINFO, wpid, (caddr_t)&pl, sizeof(pl)) != -1);
ATF_REQUIRE(pl.pl_flags & PL_FLAG_SI);
ATF_REQUIRE(pl.pl_siginfo.si_signo == SIGABRT);
/* Continue the child process discarding the signal. */
ATF_REQUIRE(ptrace(PT_CONTINUE, fpid, (caddr_t)1, 0) == 0);
/* The next stop should report a trace trap from PT_STEP. */
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_SI);
ATF_REQUIRE(pl.pl_siginfo.si_signo == SIGTRAP);
ATF_REQUIRE(pl.pl_siginfo.si_code == TRAP_TRACE);
/* Continue the child to let it exit. */
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)
{
@ -3428,6 +3514,7 @@ ATF_TP_ADD_TCS(tp)
ATF_TP_ADD_TC(tp, ptrace__parent_terminate_with_pending_sigstop2);
ATF_TP_ADD_TC(tp, ptrace__event_mask_sigkill_discard);
ATF_TP_ADD_TC(tp, ptrace__PT_ATTACH_with_SBDRY_thread);
ATF_TP_ADD_TC(tp, ptrace__PT_STEP_with_signal);
return (atf_no_error());
}