ptrace and perf watchpoints can't co-exists if their address range
overlaps. See commit 29da4f91c0c1 ("powerpc/watchpoint: Don't allow
concurrent perf and ptrace events") for more detail. Add selftest
for the same.
Sample o/p:
# ./ptrace-perf-hwbreak
test: ptrace-perf-hwbreak
tags: git_version:powerpc-5.8-7-118-g937fa174a15d-dirty
perf cpu event -> ptrace thread event (Overlapping): Ok
perf cpu event -> ptrace thread event (Non-overlapping): Ok
perf thread event -> ptrace same thread event (Overlapping): Ok
perf thread event -> ptrace same thread event (Non-overlapping): Ok
perf thread event -> ptrace other thread event: Ok
ptrace thread event -> perf kernel event: Ok
ptrace thread event -> perf same thread event (Overlapping): Ok
ptrace thread event -> perf same thread event (Non-overlapping): Ok
ptrace thread event -> perf other thread event: Ok
ptrace thread event -> perf cpu event (Overlapping): Ok
ptrace thread event -> perf cpu event (Non-overlapping): Ok
ptrace thread event -> perf same thread & cpu event (Overlapping): Ok
ptrace thread event -> perf same thread & cpu event (Non-overlapping): Ok
ptrace thread event -> perf other thread & cpu event: Ok
success: ptrace-perf-hwbreak
Signed-off-by: Ravi Bangoria <ravi.bangoria@xxxxxxxxxxxxx>
---
.../selftests/powerpc/ptrace/.gitignore | 1 +
.../testing/selftests/powerpc/ptrace/Makefile | 2 +-
.../powerpc/ptrace/ptrace-perf-hwbreak.c | 659 ++++++++++++++++++
3 files changed, 661 insertions(+), 1 deletion(-)
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-perf-hwbreak.c
diff --git a/tools/testing/selftests/powerpc/ptrace/.gitignore b/tools/testing/selftests/powerpc/ptrace/.gitignore
index 0e96150b7c7e..eb75e5360e31 100644
--- a/tools/testing/selftests/powerpc/ptrace/.gitignore
+++ b/tools/testing/selftests/powerpc/ptrace/.gitignore
@@ -14,3 +14,4 @@ perf-hwbreak
core-pkey
ptrace-pkey
ptrace-syscall
+ptrace-perf-hwbreak
diff --git a/tools/testing/selftests/powerpc/ptrace/Makefile b/tools/testing/selftests/powerpc/ptrace/Makefile
index 8d3f006c98cc..a500639da97a 100644
--- a/tools/testing/selftests/powerpc/ptrace/Makefile
+++ b/tools/testing/selftests/powerpc/ptrace/Makefile
@@ -2,7 +2,7 @@
TEST_GEN_PROGS := ptrace-gpr ptrace-tm-gpr ptrace-tm-spd-gpr \
ptrace-tar ptrace-tm-tar ptrace-tm-spd-tar ptrace-vsx ptrace-tm-vsx \
ptrace-tm-spd-vsx ptrace-tm-spr ptrace-hwbreak ptrace-pkey core-pkey \
- perf-hwbreak ptrace-syscall
+ perf-hwbreak ptrace-syscall ptrace-perf-hwbreak
top_srcdir = ../../../../..
include ../../lib.mk
diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace-perf-hwbreak.c b/tools/testing/selftests/powerpc/ptrace/ptrace-perf-hwbreak.c
new file mode 100644
index 000000000000..fad14f926b98
--- /dev/null
+++ b/tools/testing/selftests/powerpc/ptrace/ptrace-perf-hwbreak.c
@@ -0,0 +1,659 @@
+// SPDX-License-Identifier: GPL-2.0+
+#include <stdio.h>
+#include <string.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include <linux/hw_breakpoint.h>
+#include <linux/perf_event.h>
+#include <asm/unistd.h>
+#include <sys/ptrace.h>
+#include <sys/wait.h>
+#include "ptrace.h"
+
+char data[16];
+
+/* Overlapping address range */
+volatile __u64 *ptrace_data1 = (__u64 *)&data[0];
+volatile __u64 *perf_data1 = (__u64 *)&data[4];
+
+/* Non-overlapping address range */
+volatile __u64 *ptrace_data2 = (__u64 *)&data[0];
+volatile __u64 *perf_data2 = (__u64 *)&data[8];
+
+static unsigned long pid_max_addr(void)
+{
+ FILE *fp;
+ char *line, *c;
+ char addr[100];
+ size_t len = 0;
+
+ fp = fopen("/proc/kallsyms", "r");
+ if (!fp) {
+ printf("Failed to read /proc/kallsyms. Exiting..\n");
+ exit(EXIT_FAILURE);
+ }
+
+ while (getline(&line, &len, fp) != -1) {
+ if (!strstr(line, "pid_max") || strstr(line, "pid_max_max") ||
+ strstr(line, "pid_max_min"))
+ continue;
+
+ strncpy(addr, line, len < 100 ? len : 100);
+ c = strchr(addr, ' ');
+ *c = '\0';
+ return strtoul(addr, &c, 16);
+ }
+ fclose(fp);
+ printf("Could not find pix_max. Exiting..\n");
+ exit(EXIT_FAILURE);
+ return -1;
+}
+
+static void perf_user_event_attr_set(struct perf_event_attr *attr, __u64 addr, __u64 len)
+{
+ memset(attr, 0, sizeof(struct perf_event_attr));
+ attr->type = PERF_TYPE_BREAKPOINT;
+ attr->size = sizeof(struct perf_event_attr);
+ attr->bp_type = HW_BREAKPOINT_R;
+ attr->bp_addr = addr;
+ attr->bp_len = len;
+ attr->exclude_kernel = 1;
+ attr->exclude_hv = 1;
+}
+
+static void perf_kernel_event_attr_set(struct perf_event_attr *attr)
+{
+ memset(attr, 0, sizeof(struct perf_event_attr));
+ attr->type = PERF_TYPE_BREAKPOINT;
+ attr->size = sizeof(struct perf_event_attr);
+ attr->bp_type = HW_BREAKPOINT_R;
+ attr->bp_addr = pid_max_addr();
+ attr->bp_len = sizeof(unsigned long);
+ attr->exclude_user = 1;
+ attr->exclude_hv = 1;
+}
+
+static int perf_cpu_event_open(int cpu, __u64 addr, __u64 len)
+{
+ struct perf_event_attr attr;
+
+ perf_user_event_attr_set(&attr, addr, len);
+ return syscall(__NR_perf_event_open, &attr, -1, cpu, -1, 0);
+}
+
+static int perf_thread_event_open(pid_t child_pid, __u64 addr, __u64 len)
+{
+ struct perf_event_attr attr;
+
+ perf_user_event_attr_set(&attr, addr, len);
+ return syscall(__NR_perf_event_open, &attr, child_pid, -1, -1, 0);
+}
+
+static int perf_thread_cpu_event_open(pid_t child_pid, int cpu, __u64 addr, __u64 len)
+{
+ struct perf_event_attr attr;
+
+ perf_user_event_attr_set(&attr, addr, len);
+ return syscall(__NR_perf_event_open, &attr, child_pid, cpu, -1, 0);
+}
+
+static int perf_thread_kernel_event_open(pid_t child_pid)
+{
+ struct perf_event_attr attr;
+
+ perf_kernel_event_attr_set(&attr);
+ return syscall(__NR_perf_event_open, &attr, child_pid, -1, -1, 0);
+}
+
+static int perf_cpu_kernel_event_open(int cpu)
+{
+ struct perf_event_attr attr;
+
+ perf_kernel_event_attr_set(&attr);
+ return syscall(__NR_perf_event_open, &attr, -1, cpu, -1, 0);
+}
+
+static int child(void)
+{
+ int ret;
+
+ ret = ptrace(PTRACE_TRACEME, 0, NULL, 0);
+ if (ret) {
+ printf("Error: PTRACE_TRACEME failed\n");
+ return 0;
+ }
+ kill(getpid(), SIGUSR1); /* --> parent (SIGUSR1) */
+
+ return 0;
+}
+
+static void ptrace_ppc_hw_breakpoint(struct ppc_hw_breakpoint *info, int type,
+ __u64 addr, int len)
+{
+ info->version = 1;
+ info->trigger_type = type;
+ info->condition_mode = PPC_BREAKPOINT_CONDITION_NONE;
+ info->addr = addr;
+ info->addr2 = addr + len;
+ info->condition_value = 0;
+ if (!len)
+ info->addr_mode = PPC_BREAKPOINT_MODE_EXACT;
+ else
+ info->addr_mode = PPC_BREAKPOINT_MODE_RANGE_INCLUSIVE;
+}
+
+static int ptrace_open(pid_t child_pid, __u64 wp_addr, int len)
+{
+ struct ppc_hw_breakpoint info;
+
+ ptrace_ppc_hw_breakpoint(&info, PPC_BREAKPOINT_TRIGGER_RW, wp_addr, len);
+ return ptrace(PPC_PTRACE_SETHWDEBUG, child_pid, 0, &info);
+}
+
+static int test1(pid_t child_pid)
+{
+ int perf_fd;
+ int ptrace_fd;
+ int ret = 0;
+
+ /* Test:
+ * if (new per thread event by ptrace)
+ * if (existing cpu event by perf)
+ * if (addr range overlaps)
+ * fail;
+ */
+
+ perf_fd = perf_cpu_event_open(0, (__u64)perf_data1, sizeof(*perf_data1));
+ if (perf_fd < 0)
+ return -1;
+
+ ptrace_fd = ptrace_open(child_pid, (__u64)ptrace_data1, sizeof(*ptrace_data1));
+ if (ptrace_fd > 0 || errno != ENOSPC)
+ ret = -1;
+
+ close(perf_fd);
+ return ret;
+}
+
+static int test2(pid_t child_pid)
+{
+ int perf_fd;
+ int ptrace_fd;
+ int ret = 0;
+
+ /* Test:
+ * if (new per thread event by ptrace)
+ * if (existing cpu event by perf)
+ * if (addr range does not overlaps)
+ * allow;
+ */
+
+ perf_fd = perf_cpu_event_open(0, (__u64)perf_data2, sizeof(*perf_data2));
+ if (perf_fd < 0)
+ return -1;
+
+ ptrace_fd = ptrace_open(child_pid, (__u64)ptrace_data2, sizeof(*ptrace_data2));
+ if (ptrace_fd < 0) {
+ ret = -1;
+ goto perf_close;
+ }
+ ptrace(PPC_PTRACE_DELHWDEBUG, child_pid, 0, ptrace_fd);
+
+perf_close:
+ close(perf_fd);
+ return ret;
+}
+
+static int test3(pid_t child_pid)
+{
+ int perf_fd;
+ int ptrace_fd;
+ int ret = 0;
+
+ /* Test:
+ * if (new per thread event by ptrace)
+ * if (existing thread event by perf on the same thread)
+ * if (addr range overlaps)
+ * fail;
+ */
+ perf_fd = perf_thread_event_open(child_pid, (__u64)perf_data1,
+ sizeof(*perf_data1));
+ if (perf_fd < 0)
+ return -1;
+
+ ptrace_fd = ptrace_open(child_pid, (__u64)ptrace_data1, sizeof(*ptrace_data1));
+ if (ptrace_fd > 0 || errno != ENOSPC)
+ ret = -1;
+
+ close(perf_fd);
+ return ret;
+}
+
+static int test4(pid_t child_pid)
+{
+ int perf_fd;
+ int ptrace_fd;
+ int ret = 0;
+
+ /* Test:
+ * if (new per thread event by ptrace)
+ * if (existing thread event by perf on the same thread)
+ * if (addr range does not overlaps)
+ * fail;
+ */
+ perf_fd = perf_thread_event_open(child_pid, (__u64)perf_data2,
+ sizeof(*perf_data2));
+ if (perf_fd < 0)
+ return -1;
+
+ ptrace_fd = ptrace_open(child_pid, (__u64)ptrace_data2, sizeof(*ptrace_data2));
+ if (ptrace_fd < 0) {
+ ret = -1;
+ goto perf_close;
+ }
+ ptrace(PPC_PTRACE_DELHWDEBUG, child_pid, 0, ptrace_fd);
+
+perf_close:
+ close(perf_fd);
+ return ret;
+}
+
+static int test5(pid_t child_pid)
+{
+ int perf_fd;
+ int ptrace_fd;
+ int cpid;
+ int ret = 0;
+
+ /* Test:
+ * if (new per thread event by ptrace)
+ * if (existing thread event by perf on the different thread)
+ * allow;
+ */
+ cpid = fork();
+ if (!cpid) {
+ /* Temporary Child */
+ pause();
+ exit(EXIT_SUCCESS);
+ }
+
+ perf_fd = perf_thread_event_open(cpid, (__u64)perf_data1, sizeof(*perf_data1));
+ if (perf_fd < 0) {
+ ret = -1;
+ goto kill_child;
+ }
+
+ ptrace_fd = ptrace_open(child_pid, (__u64)ptrace_data1, sizeof(*ptrace_data1));
+ if (ptrace_fd < 0) {
+ ret = -1;
+ goto perf_close;
+ }
+
+ ptrace(PPC_PTRACE_DELHWDEBUG, child_pid, 0, ptrace_fd);
+perf_close:
+ close(perf_fd);
+kill_child:
+ kill(cpid, SIGINT);
+ return ret;
+}
+
+static int test6(pid_t child_pid)
+{
+ int perf_fd;
+ int ptrace_fd;
+ int ret = 0;
+
+ /* Test:
+ * if (new per thread kernel event by perf)
+ * if (existing thread event by ptrace on the same thread)
+ * allow;
+ * -- OR --
+ * if (new per cpu kernel event by perf)
+ * if (existing thread event by ptrace)
+ * allow;
+ */
+ ptrace_fd = ptrace_open(child_pid, (__u64)ptrace_data1, sizeof(*ptrace_data1));
+ if (ptrace_fd < 0)
+ return -1;
+
+ perf_fd = perf_thread_kernel_event_open(child_pid);
+ if (perf_fd < 0) {
+ ret = -1;
+ goto ptrace_close;
+ }
+ close(perf_fd);
+
+ perf_fd = perf_cpu_kernel_event_open(0);
+ if (perf_fd < 0) {
+ ret = -1;
+ goto ptrace_close;
+ }
+ close(perf_fd);
+
+ptrace_close:
+ ptrace(PPC_PTRACE_DELHWDEBUG, child_pid, 0, ptrace_fd);
+ return ret;
+}
+
+static int test7(pid_t child_pid)
+{
+ int perf_fd;
+ int ptrace_fd;
+ int ret = 0;
+
+ /* Test:
+ * if (new per thread event by perf)
+ * if (existing thread event by ptrace on the same thread)
+ * if (addr range overlaps)
+ * fail;
+ */
+ ptrace_fd = ptrace_open(child_pid, (__u64)ptrace_data1, sizeof(*ptrace_data1));
+ if (ptrace_fd < 0)
+ return -1;
+
+ perf_fd = perf_thread_event_open(child_pid, (__u64)perf_data1,
+ sizeof(*perf_data1));
+ if (perf_fd > 0 || errno != ENOSPC)
+ ret = -1;
+
+ ptrace(PPC_PTRACE_DELHWDEBUG, child_pid, 0, ptrace_fd);
+ return ret;
+}
+
+static int test8(pid_t child_pid)
+{
+ int perf_fd;
+ int ptrace_fd;
+ int ret = 0;
+
+ /* Test:
+ * if (new per thread event by perf)
+ * if (existing thread event by ptrace on the same thread)
+ * if (addr range does not overlaps)
+ * allow;
+ */
+ ptrace_fd = ptrace_open(child_pid, (__u64)ptrace_data2, sizeof(*ptrace_data2));
+ if (ptrace_fd < 0)
+ return -1;
+
+ perf_fd = perf_thread_event_open(child_pid, (__u64)perf_data2,
+ sizeof(*perf_data2));
+ if (perf_fd < 0) {
+ ret = -1;
+ goto ptrace_close;
+ }
+ close(perf_fd);
+
+ptrace_close:
+ ptrace(PPC_PTRACE_DELHWDEBUG, child_pid, 0, ptrace_fd);
+ return ret;
+}
+
+static int test9(pid_t child_pid)
+{
+ int perf_fd;
+ int ptrace_fd;
+ int cpid;
+ int ret = 0;
+
+ /* Test:
+ * if (new per thread event by perf)
+ * if (existing thread event by ptrace on the other thread)
+ * allow;
+ */
+ ptrace_fd = ptrace_open(child_pid, (__u64)ptrace_data1, sizeof(*ptrace_data1));
+ if (ptrace_fd < 0)
+ return -1;
+
+ cpid = fork();
+ if (!cpid) {
+ /* Temporary Child */
+ pause();
+ exit(EXIT_SUCCESS);
+ }
+
+ perf_fd = perf_thread_event_open(cpid, (__u64)perf_data1, sizeof(*perf_data1));
+ if (perf_fd < 0) {
+ ret = -1;
+ goto kill_child;
+ }
+ close(perf_fd);
+
+kill_child:
+ kill(cpid, SIGINT);
+ ptrace(PPC_PTRACE_DELHWDEBUG, child_pid, 0, ptrace_fd);
+ return ret;
+}
+
+static int test10(pid_t child_pid)
+{
+ int perf_fd;
+ int ptrace_fd;
+ int ret = 0;
+
+ /* Test:
+ * if (new per cpu event by perf)
+ * if (existing thread event by ptrace on the same thread)
+ * if (addr range overlaps)
+ * fail;
+ */
+ ptrace_fd = ptrace_open(child_pid, (__u64)ptrace_data1, sizeof(*ptrace_data1));
+ if (ptrace_fd < 0)
+ return -1;
+
+ perf_fd = perf_cpu_event_open(0, (__u64)perf_data1, sizeof(*perf_data1));
+ if (perf_fd > 0 || errno != ENOSPC)
+ ret = -1;
+
+ ptrace(PPC_PTRACE_DELHWDEBUG, child_pid, 0, ptrace_fd);
+ return ret;
+}
+
+static int test11(pid_t child_pid)
+{
+ int perf_fd;
+ int ptrace_fd;
+ int ret = 0;
+
+ /* Test:
+ * if (new per cpu event by perf)
+ * if (existing thread event by ptrace on the same thread)
+ * if (addr range does not overlap)
+ * allow;
+ */
+ ptrace_fd = ptrace_open(child_pid, (__u64)ptrace_data2, sizeof(*ptrace_data2));
+ if (ptrace_fd < 0)
+ return -1;
+
+ perf_fd = perf_cpu_event_open(0, (__u64)perf_data2, sizeof(*perf_data2));
+ if (perf_fd < 0) {
+ ret = -1;
+ goto ptrace_close;
+ }
+ close(perf_fd);
+
+ptrace_close:
+ ptrace(PPC_PTRACE_DELHWDEBUG, child_pid, 0, ptrace_fd);
+ return ret;
+}
+
+static int test12(pid_t child_pid)
+{
+ int perf_fd;
+ int ptrace_fd;
+ int ret = 0;
+
+ /* Test:
+ * if (new per thread and per cpu event by perf)
+ * if (existing thread event by ptrace on the same thread)
+ * if (addr range overlaps)
+ * fail;
+ */
+ ptrace_fd = ptrace_open(child_pid, (__u64)ptrace_data1, sizeof(*ptrace_data1));
+ if (ptrace_fd < 0)
+ return -1;
+
+ perf_fd = perf_thread_cpu_event_open(child_pid, 0, (__u64)perf_data1, sizeof(*perf_data1));
+ if (perf_fd > 0 || errno != ENOSPC)
+ ret = -1;
+
+ ptrace(PPC_PTRACE_DELHWDEBUG, child_pid, 0, ptrace_fd);
+ return ret;
+}
+
+static int test13(pid_t child_pid)
+{
+ int perf_fd;
+ int ptrace_fd;
+ int ret = 0;
+
+ /* Test:
+ * if (new per thread and per cpu event by perf)
+ * if (existing thread event by ptrace on the same thread)
+ * if (addr range does not overlap)
+ * allow;
+ */
+ ptrace_fd = ptrace_open(child_pid, (__u64)ptrace_data2, sizeof(*ptrace_data2));
+ if (ptrace_fd < 0)
+ return -1;
+
+ perf_fd = perf_thread_cpu_event_open(child_pid, 0, (__u64)perf_data2, sizeof(*perf_data2));
+ if (perf_fd < 0) {
+ ret = -1;
+ goto ptrace_close;
+ }
+ close(perf_fd);
+
+ptrace_close:
+ ptrace(PPC_PTRACE_DELHWDEBUG, child_pid, 0, ptrace_fd);
+ return ret;
+}
+
+static int test14(pid_t child_pid)
+{
+ int perf_fd;
+ int ptrace_fd;
+ int cpid;
+ int ret = 0;
+
+ /* Test:
+ * if (new per thread and per cpu event by perf)
+ * if (existing thread event by ptrace on the other thread)
+ * allow;
+ */
+ ptrace_fd = ptrace_open(child_pid, (__u64)ptrace_data1, sizeof(*ptrace_data1));
+ if (ptrace_fd < 0)
+ return -1;
+
+ cpid = fork();
+ if (!cpid) {
+ /* Temporary Child */
+ pause();
+ exit(EXIT_SUCCESS);
+ }
+
+ perf_fd = perf_thread_cpu_event_open(cpid, 0, (__u64)perf_data1,
+ sizeof(*perf_data1));
+ if (perf_fd < 0) {
+ ret = -1;
+ goto kill_child;
+ }
+ close(perf_fd);
+
+kill_child:
+ kill(cpid, SIGINT);
+ ptrace(PPC_PTRACE_DELHWDEBUG, child_pid, 0, ptrace_fd);
+ return ret;
+}
+
+static int do_test(const char *msg, int (*fun)(pid_t arg), pid_t arg)
+{
+ int ret;
+
+ ret = fun(arg);
+ if (ret)
+ printf("%s: Error\n", msg);
+ else
+ printf("%s: Ok\n", msg);
+ return ret;
+}
+
+char *desc[14] = {
+ "perf cpu event -> ptrace thread event (Overlapping)",
+ "perf cpu event -> ptrace thread event (Non-overlapping)",
+ "perf thread event -> ptrace same thread event (Overlapping)",
+ "perf thread event -> ptrace same thread event (Non-overlapping)",
+ "perf thread event -> ptrace other thread event",
+ "ptrace thread event -> perf kernel event",
+ "ptrace thread event -> perf same thread event (Overlapping)",
+ "ptrace thread event -> perf same thread event (Non-overlapping)",
+ "ptrace thread event -> perf other thread event",
+ "ptrace thread event -> perf cpu event (Overlapping)",
+ "ptrace thread event -> perf cpu event (Non-overlapping)",
+ "ptrace thread event -> perf same thread & cpu event (Overlapping)",
+ "ptrace thread event -> perf same thread & cpu event (Non-overlapping)",
+ "ptrace thread event -> perf other thread & cpu event",
+};
+
+static int test(pid_t child_pid)
+{
+ int ret = TEST_PASS;
+
+ ret |= do_test(desc[0], test1, child_pid);
+ ret |= do_test(desc[1], test2, child_pid);
+ ret |= do_test(desc[2], test3, child_pid);
+ ret |= do_test(desc[3], test4, child_pid);
+ ret |= do_test(desc[4], test5, child_pid);
+ ret |= do_test(desc[5], test6, child_pid);
+ ret |= do_test(desc[6], test7, child_pid);
+ ret |= do_test(desc[7], test8, child_pid);
+ ret |= do_test(desc[8], test9, child_pid);
+ ret |= do_test(desc[9], test10, child_pid);
+ ret |= do_test(desc[10], test11, child_pid);
+ ret |= do_test(desc[11], test12, child_pid);
+ ret |= do_test(desc[12], test13, child_pid);
+ ret |= do_test(desc[13], test14, child_pid);
+
+ return ret;
+}
+
+static void get_dbginfo(pid_t child_pid, struct ppc_debug_info *dbginfo)
+{
+ if (ptrace(PPC_PTRACE_GETHWDBGINFO, child_pid, NULL, dbginfo)) {
+ perror("Can't get breakpoint info");
+ exit(-1);
+ }
+}
+
+static int ptrace_perf_hwbreak(void)
+{
+ int ret;
+ pid_t child_pid;
+ struct ppc_debug_info dbginfo;
+
+ child_pid = fork();
+ if (!child_pid)
+ return child();
+
+ /* parent */
+ wait(NULL); /* <-- child (SIGUSR1) */
+
+ get_dbginfo(child_pid, &dbginfo);
+ SKIP_IF(dbginfo.num_data_bps <= 1);
+
+ ret = perf_cpu_event_open(0, (__u64)perf_data1, sizeof(*perf_data1));
+ SKIP_IF(ret < 0);
+ close(ret);
+
+ ret = test(child_pid);
+
+ ptrace(PTRACE_CONT, child_pid, NULL, 0);
+ return ret;
+}
+
+int main(int argc, char *argv[])
+{
+ return test_harness(ptrace_perf_hwbreak, "ptrace-perf-hwbreak");
+}
--
2.27.0
