[src/trunk]: src/tests/lib/libc/sys Extend traceme_vfork_breakpoint in ATF pt...

[kamil <kamil%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/57e20fde529f
branches:  trunk
changeset: 322921:57e20fde529f
user:      kamil <kamil%NetBSD.org@localhost>
date:      Wed May 23 13:51:27 2018 +0000

description:
Extend traceme_vfork_breakpoint in ATF ptrace(2) tests for more scenarios

traceme_vfork_breakpoint used to test SIGTRAP event. Reuse its code for:
SIGSEGV, SIGILL, SIGFPE and SIGBUS.

The SIGILL case is disabled as of now as it required addition of
PTRACE_ILLEGAL_ASM in MD ptrace(2) headers.

Added tests:
 - traceme_vfork_crash_trap
 - traceme_vfork_crash_segv (renamed from traceme_vfork_breakpoint)
 - traceme_vfork_crash_ill (disabled)
 - traceme_vfork_crash_fpe
 - traceme_vfork_crash_bus

All enabled tests pass.

Sponsored by <The NetBSD Foundation>

diffstat:

 tests/lib/libc/sys/t_ptrace_wait.c |  78 +++++++++++++++++++++++++------------
 1 files changed, 53 insertions(+), 25 deletions(-)

diffs (132 lines):

diff -r b56b7ecd447b -r 57e20fde529f tests/lib/libc/sys/t_ptrace_wait.c
--- a/tests/lib/libc/sys/t_ptrace_wait.c        Wed May 23 13:18:09 2018 +0000
+++ b/tests/lib/libc/sys/t_ptrace_wait.c        Wed May 23 13:51:27 2018 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: t_ptrace_wait.c,v 1.51 2018/05/23 01:29:43 kamil Exp $ */
+/*     $NetBSD: t_ptrace_wait.c,v 1.52 2018/05/23 13:51:27 kamil Exp $ */
 
 /*-
  * Copyright (c) 2016 The NetBSD Foundation, Inc.
@@ -27,7 +27,7 @@
  */
 
 #include <sys/cdefs.h>
-__RCSID("$NetBSD: t_ptrace_wait.c,v 1.51 2018/05/23 01:29:43 kamil Exp $");
+__RCSID("$NetBSD: t_ptrace_wait.c,v 1.52 2018/05/23 13:51:27 kamil Exp $");
 
 #include <sys/param.h>
 #include <sys/types.h>
@@ -746,15 +746,8 @@
 
 /// ----------------------------------------------------------------------------
 
-ATF_TC(traceme_vfork_breakpoint);
-ATF_TC_HEAD(traceme_vfork_breakpoint, tc)
-{
-       atf_tc_set_md_var(tc, "descr",
-           "Verify PT_TRACE_ME followed by a software breakpoint in a "
-           "vfork(2)ed child");
-}
-
-ATF_TC_BODY(traceme_vfork_breakpoint, tc)
+static void
+traceme_vfork_crash(int sig)
 {
        pid_t child, wpid;
 #if defined(TWAIT_HAVE_STATUS)
@@ -767,12 +760,27 @@
                DPRINTF("Before calling PT_TRACE_ME from child %d\n", getpid());
                FORKEE_ASSERT(ptrace(PT_TRACE_ME, 0, NULL, 0) != -1);
 
-               DPRINTF("Before executing a software breakpoint\n");
-#ifdef PTRACE_BREAKPOINT_ASM
-               PTRACE_BREAKPOINT_ASM;
-#else
-               /* port me */
-#endif
+               DPRINTF("Before executing a trap\n");
+               switch (sig) {
+               case SIGTRAP:
+                       trigger_trap();
+                       break;
+               case SIGSEGV:
+                       trigger_segv();
+                       break;
+               case SIGILL:
+                       trigger_ill();
+                       break;
+               case SIGFPE:
+                       trigger_fpe();
+                       break;
+               case SIGBUS:
+                       trigger_bus();
+                       break;
+               default:
+                       /* NOTREACHED */
+                       FORKEE_ASSERTX(0 && "This shall not be reached");
+               }
 
                /* NOTREACHED */
                FORKEE_ASSERTX(0 && "This shall not be reached");
@@ -782,12 +790,33 @@
        DPRINTF("Before calling %s() for the child\n", TWAIT_FNAME);
        TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child);
 
-       validate_status_signaled(status, SIGTRAP, 1);
+       validate_status_signaled(status, sig, 1);
 
        DPRINTF("Before calling %s() for the child\n", TWAIT_FNAME);
        TWAIT_REQUIRE_FAILURE(ECHILD, wpid = TWAIT_GENERIC(child, &status, 0));
 }
 
+#define TRACEME_VFORK_CRASH(test, sig)                                         \
+ATF_TC(test);                                                                  \
+ATF_TC_HEAD(test, tc)                                                          \
+{                                                                              \
+       atf_tc_set_md_var(tc, "descr",                                          \
+           "Verify PT_TRACE_ME followed by a crash signal " #sig " in a "      \
+           "vfork(2)ed child");                                                \
+}                                                                              \
+                                                                               \
+ATF_TC_BODY(test, tc)                                                          \
+{                                                                              \
+                                                                               \
+       traceme_vfork_crash(sig);                                               \
+}
+
+TRACEME_VFORK_CRASH(traceme_vfork_crash_trap, SIGTRAP)
+TRACEME_VFORK_CRASH(traceme_vfork_crash_segv, SIGSEGV)
+//TRACEME_VFORK_CRASH(traceme_vfork_crash_ill, SIGILL)
+TRACEME_VFORK_CRASH(traceme_vfork_crash_fpe, SIGFPE)
+TRACEME_VFORK_CRASH(traceme_vfork_crash_bus, SIGBUS)
+
 /// ----------------------------------------------------------------------------
 
 ATF_TC(traceme_vfork_exec);
@@ -5783,12 +5812,7 @@
                FORKEE_ASSERT(raise(sigval) == 0);
 
                DPRINTF("Before raising software breakpoint from child\n");
-
-#ifdef PTRACE_BREAKPOINT_ASM
-               PTRACE_BREAKPOINT_ASM;
-#else
-               /* port me */
-#endif
+               trigger_trap();
 
                DPRINTF("Before exiting of the child process\n");
                _exit(exitval);
@@ -7102,7 +7126,11 @@
        ATF_TP_ADD_TC(tp, traceme_vfork_raise7);
        ATF_TP_ADD_TC(tp, traceme_vfork_raise8);
 
-       ATF_TP_ADD_TC(tp, traceme_vfork_breakpoint);
+       ATF_TP_ADD_TC(tp, traceme_vfork_crash_trap);
+       ATF_TP_ADD_TC(tp, traceme_vfork_crash_segv);
+//     ATF_TP_ADD_TC(tp, traceme_vfork_crash_ill);
+       ATF_TP_ADD_TC(tp, traceme_vfork_crash_fpe);
+       ATF_TP_ADD_TC(tp, traceme_vfork_crash_bus);
 
        ATF_TP_ADD_TC(tp, traceme_vfork_exec);