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[src/trunk]: src/tests/lib/libc/sys Extend concurrent events test to watchpoints
details: https://anonhg.NetBSD.org/src/rev/0fb373cfb253
branches: trunk
changeset: 744817:0fb373cfb253
user: mgorny <mgorny%NetBSD.org@localhost>
date: Thu Feb 13 15:27:25 2020 +0000
description:
Extend concurrent events test to watchpoints
diffstat:
tests/lib/libc/sys/t_ptrace_wait.c | 63 ++++++++++++++++++++++++++++-----
tests/lib/libc/sys/t_ptrace_x86_wait.h | 16 +++++++-
2 files changed, 66 insertions(+), 13 deletions(-)
diffs (237 lines):
diff -r db1745aee869 -r 0fb373cfb253 tests/lib/libc/sys/t_ptrace_wait.c
--- a/tests/lib/libc/sys/t_ptrace_wait.c Thu Feb 13 15:27:05 2020 +0000
+++ b/tests/lib/libc/sys/t_ptrace_wait.c Thu Feb 13 15:27:25 2020 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: t_ptrace_wait.c,v 1.160 2020/02/13 15:27:05 mgorny Exp $ */
+/* $NetBSD: t_ptrace_wait.c,v 1.161 2020/02/13 15:27:25 mgorny Exp $ */
/*-
* Copyright (c) 2016, 2017, 2018, 2019 The NetBSD Foundation, Inc.
@@ -27,7 +27,7 @@
*/
#include <sys/cdefs.h>
-__RCSID("$NetBSD: t_ptrace_wait.c,v 1.160 2020/02/13 15:27:05 mgorny Exp $");
+__RCSID("$NetBSD: t_ptrace_wait.c,v 1.161 2020/02/13 15:27:25 mgorny Exp $");
#define __LEGACY_PT_LWPINFO
@@ -8622,6 +8622,7 @@
#define THREAD_CONCURRENT_BREAKPOINT_NUM 50
#define THREAD_CONCURRENT_SIGNALS_NUM 50
+#define THREAD_CONCURRENT_WATCHPOINT_NUM 50
/* List of signals to use for the test */
const int thread_concurrent_signals_list[] = {
@@ -8647,6 +8648,7 @@
static pthread_barrier_t thread_concurrent_barrier;
static pthread_key_t thread_concurrent_key;
+static uint32_t thread_concurrent_watchpoint_var = 0;
static void *
thread_concurrent_breakpoint_thread(void *arg)
@@ -8687,10 +8689,20 @@
return NULL;
}
+static void *
+thread_concurrent_watchpoint_thread(void *arg)
+{
+ pthread_barrier_wait(&thread_concurrent_barrier);
+ DPRINTF("Before modifying var from LWP %d\n", _lwp_self());
+ thread_concurrent_watchpoint_var = 1;
+ return NULL;
+}
+
#if defined(__i386__) || defined(__x86_64__)
enum thread_concurrent_sigtrap_event {
TCSE_UNKNOWN,
- TCSE_BREAKPOINT
+ TCSE_BREAKPOINT,
+ TCSE_WATCHPOINT
};
static void
@@ -8701,7 +8713,7 @@
static void
thread_concurrent_test(enum thread_concurrent_signal_handling signal_handle,
- int breakpoint_threads, int signal_threads)
+ int breakpoint_threads, int signal_threads, int watchpoint_threads)
{
const int exitval = 5;
const int sigval = SIGSTOP;
@@ -8711,6 +8723,8 @@
= {{0, 0}};
struct lwp_event_count bp_counts[THREAD_CONCURRENT_BREAKPOINT_NUM]
= {{0, 0}};
+ struct lwp_event_count wp_counts[THREAD_CONCURRENT_BREAKPOINT_NUM]
+ = {{0, 0}};
ptrace_event_t event;
int i;
@@ -8722,12 +8736,14 @@
/* Protect against out-of-bounds array access. */
ATF_REQUIRE(breakpoint_threads <= THREAD_CONCURRENT_BREAKPOINT_NUM);
ATF_REQUIRE(signal_threads <= THREAD_CONCURRENT_SIGNALS_NUM);
+ ATF_REQUIRE(watchpoint_threads <= THREAD_CONCURRENT_WATCHPOINT_NUM);
DPRINTF("Before forking process PID=%d\n", getpid());
SYSCALL_REQUIRE((child = fork()) != -1);
if (child == 0) {
pthread_t bp_threads[THREAD_CONCURRENT_BREAKPOINT_NUM];
pthread_t sig_threads[THREAD_CONCURRENT_SIGNALS_NUM];
+ pthread_t wp_threads[THREAD_CONCURRENT_WATCHPOINT_NUM];
DPRINTF("Before calling PT_TRACE_ME from child %d\n", getpid());
FORKEE_ASSERT(ptrace(PT_TRACE_ME, 0, NULL, 0) != -1);
@@ -8757,7 +8773,8 @@
DPRINTF("Before starting threads from the child\n");
FORKEE_ASSERT(pthread_barrier_init(
&thread_concurrent_barrier, NULL,
- breakpoint_threads + signal_threads) == 0);
+ breakpoint_threads + signal_threads + watchpoint_threads)
+ == 0);
FORKEE_ASSERT(pthread_key_create(&thread_concurrent_key, NULL)
== 0);
@@ -8770,8 +8787,15 @@
FORKEE_ASSERT(pthread_create(&bp_threads[i], NULL,
thread_concurrent_breakpoint_thread, NULL) == 0);
}
+ for (i = 0; i < watchpoint_threads; i++) {
+ FORKEE_ASSERT(pthread_create(&wp_threads[i], NULL,
+ thread_concurrent_watchpoint_thread, NULL) == 0);
+ }
DPRINTF("Before joining threads from the child\n");
+ for (i = 0; i < watchpoint_threads; i++) {
+ FORKEE_ASSERT(pthread_join(wp_threads[i], NULL) == 0);
+ }
for (i = 0; i < breakpoint_threads; i++) {
FORKEE_ASSERT(pthread_join(bp_threads[i], NULL) == 0);
}
@@ -8852,6 +8876,10 @@
*FIND_EVENT_COUNT(bp_counts,
info.psi_lwpid) += 1;
break;
+ case TCSE_WATCHPOINT:
+ *FIND_EVENT_COUNT(wp_counts,
+ info.psi_lwpid) += 1;
+ break;
}
#else
ATF_CHECK_MSG(0, "Unexpected SIGTRAP, si_code=%d\n",
@@ -8883,10 +8911,19 @@
"extraneous bp_counts[%d].lec_count=%d; lec_lwp=%d",
i, bp_counts[i].lec_count, bp_counts[i].lec_lwp);
+ for (i = 0; i < watchpoint_threads; i++)
+ ATF_CHECK_EQ_MSG(wp_counts[i].lec_count, 1,
+ "wp_counts[%d].lec_count=%d; lec_lwp=%d",
+ i, wp_counts[i].lec_count, wp_counts[i].lec_lwp);
+ for (i = watchpoint_threads; i < THREAD_CONCURRENT_WATCHPOINT_NUM; i++)
+ ATF_CHECK_EQ_MSG(wp_counts[i].lec_count, 0,
+ "extraneous wp_counts[%d].lec_count=%d; lec_lwp=%d",
+ i, wp_counts[i].lec_count, wp_counts[i].lec_lwp);
+
validate_status_exited(status, exitval);
}
-#define THREAD_CONCURRENT_TEST(test, sig_hdl, bps, sigs, descr) \
+#define THREAD_CONCURRENT_TEST(test, sig_hdl, bps, sigs, wps, descr) \
ATF_TC(test); \
ATF_TC_HEAD(test, tc) \
{ \
@@ -8895,24 +8932,27 @@
\
ATF_TC_BODY(test, tc) \
{ \
- thread_concurrent_test(sig_hdl, bps, sigs); \
+ thread_concurrent_test(sig_hdl, bps, sigs, wps); \
}
THREAD_CONCURRENT_TEST(thread_concurrent_signals, TCSH_DISCARD,
- 0, THREAD_CONCURRENT_SIGNALS_NUM,
+ 0, THREAD_CONCURRENT_SIGNALS_NUM, 0,
"Verify that concurrent signals issued to a single thread are reported "
"correctly");
THREAD_CONCURRENT_TEST(thread_concurrent_signals_sig_ign, TCSH_SIG_IGN,
- 0, THREAD_CONCURRENT_SIGNALS_NUM,
+ 0, THREAD_CONCURRENT_SIGNALS_NUM, 0,
"Verify that concurrent signals issued to a single thread are reported "
"correctly and passed back to SIG_IGN handler");
THREAD_CONCURRENT_TEST(thread_concurrent_signals_handler, TCSH_HANDLER,
- 0, THREAD_CONCURRENT_SIGNALS_NUM,
+ 0, THREAD_CONCURRENT_SIGNALS_NUM, 0,
"Verify that concurrent signals issued to a single thread are reported "
"correctly and passed back to a handler function");
THREAD_CONCURRENT_TEST(thread_concurrent_breakpoints, TCSH_DISCARD,
- THREAD_CONCURRENT_BREAKPOINT_NUM, 0,
+ THREAD_CONCURRENT_BREAKPOINT_NUM, 0, 0,
+ "Verify that concurrent breakpoints are reported correctly");
+THREAD_CONCURRENT_TEST(thread_concurrent_watchpoints, TCSH_DISCARD,
+ 0, 0, THREAD_CONCURRENT_WATCHPOINT_NUM,
"Verify that concurrent breakpoints are reported correctly");
#endif /*defined(TWAIT_HAVE_STATUS)*/
@@ -9509,6 +9549,7 @@
ATF_TP_ADD_TC(tp, thread_concurrent_signals_handler);
#if defined(__i386__) || defined(__x86_64__)
ATF_TP_ADD_TC(tp, thread_concurrent_breakpoints);
+ ATF_TP_ADD_TC(tp, thread_concurrent_watchpoints);
#endif
#endif
diff -r db1745aee869 -r 0fb373cfb253 tests/lib/libc/sys/t_ptrace_x86_wait.h
--- a/tests/lib/libc/sys/t_ptrace_x86_wait.h Thu Feb 13 15:27:05 2020 +0000
+++ b/tests/lib/libc/sys/t_ptrace_x86_wait.h Thu Feb 13 15:27:25 2020 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: t_ptrace_x86_wait.h,v 1.20 2020/02/13 15:27:05 mgorny Exp $ */
+/* $NetBSD: t_ptrace_x86_wait.h,v 1.21 2020/02/13 15:27:25 mgorny Exp $ */
/*-
* Copyright (c) 2016, 2017, 2018, 2019 The NetBSD Foundation, Inc.
@@ -3572,9 +3572,15 @@
dr7.bits.global_dr0_breakpoint = 1;
dr7.bits.condition_dr0 = 0; /* exec */
dr7.bits.len_dr0 = 0;
+ /* use DR1 for watchpoints */
+ dr7.bits.global_dr1_breakpoint = 1;
+ dr7.bits.condition_dr1 = 1; /* write */
+ dr7.bits.len_dr1 = 3; /* 4 bytes */
r.dr[7] = dr7.raw;
r.dr[0] = (long)(intptr_t)check_happy;
+ r.dr[1] = (long)(intptr_t)&thread_concurrent_watchpoint_var;
DPRINTF("dr0=%" PRIxREGISTER "\n", r.dr[0]);
+ DPRINTF("dr1=%" PRIxREGISTER "\n", r.dr[1]);
DPRINTF("dr7=%" PRIxREGISTER "\n", r.dr[7]);
DPRINTF("Call SETDBREGS for LWP %d\n", lwpid);
@@ -3597,9 +3603,12 @@
DPRINTF("dr6=%" PRIxREGISTER ", dr7=%" PRIxREGISTER "\n",
r.dr[6], r.dr[7]);
- ATF_CHECK_MSG(r.dr[6] & 1, "lwp=%d, got DR6=%" PRIxREGISTER,
+ ATF_CHECK_MSG(r.dr[6] & 3, "lwp=%d, got DR6=%" PRIxREGISTER,
info->psi_lwpid, r.dr[6]);
+ /* Handle only one event at a time, we should get
+ * a separate SIGTRAP for the other one.
+ */
if (r.dr[6] & 1) {
r.dr[6] &= ~1;
@@ -3613,6 +3622,9 @@
r.dr[7] = dr7.raw;
ret = TCSE_BREAKPOINT;
+ } else if (r.dr[6] & 2) {
+ r.dr[6] &= ~2;
+ ret = TCSE_WATCHPOINT;
}
DPRINTF("Call SETDBREGS for LWP %d\n", info->psi_lwpid);
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