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Diffstat (limited to 'tools/testing/selftests/user_events/ftrace_test.c')
-rw-r--r--tools/testing/selftests/user_events/ftrace_test.c254
1 files changed, 173 insertions, 81 deletions
diff --git a/tools/testing/selftests/user_events/ftrace_test.c b/tools/testing/selftests/user_events/ftrace_test.c
index 404a2713dcae8..eb6904d89f145 100644
--- a/tools/testing/selftests/user_events/ftrace_test.c
+++ b/tools/testing/selftests/user_events/ftrace_test.c
@@ -12,20 +12,16 @@
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
+#include <sys/uio.h>
#include <unistd.h>
#include "../kselftest_harness.h"
-const char *data_file = "/sys/kernel/debug/tracing/user_events_data";
-const char *status_file = "/sys/kernel/debug/tracing/user_events_status";
-const char *enable_file = "/sys/kernel/debug/tracing/events/user_events/__test_event/enable";
-const char *trace_file = "/sys/kernel/debug/tracing/trace";
-const char *fmt_file = "/sys/kernel/debug/tracing/events/user_events/__test_event/format";
-
-static inline int status_check(char *status_page, int status_bit)
-{
- return status_page[status_bit >> 3] & (1 << (status_bit & 7));
-}
+const char *data_file = "/sys/kernel/tracing/user_events_data";
+const char *status_file = "/sys/kernel/tracing/user_events_status";
+const char *enable_file = "/sys/kernel/tracing/events/user_events/__test_event/enable";
+const char *trace_file = "/sys/kernel/tracing/trace";
+const char *fmt_file = "/sys/kernel/tracing/events/user_events/__test_event/format";
static int trace_bytes(void)
{
@@ -106,23 +102,59 @@ err:
return -1;
}
-static int clear(void)
+static bool wait_for_delete(void)
+{
+ int i;
+
+ for (i = 0; i < 1000; ++i) {
+ int fd = open(enable_file, O_RDONLY);
+
+ if (fd == -1)
+ return true;
+
+ close(fd);
+ usleep(1000);
+ }
+
+ return false;
+}
+
+static int clear(int *check)
{
- int fd = open(data_file, O_RDWR);
+ struct user_unreg unreg = {0};
+ int fd;
+
+ unreg.size = sizeof(unreg);
+ unreg.disable_bit = 31;
+ unreg.disable_addr = (__u64)check;
+
+ fd = open(data_file, O_RDWR);
if (fd == -1)
return -1;
- if (ioctl(fd, DIAG_IOCSDEL, "__test_event") == -1)
+ if (ioctl(fd, DIAG_IOCSUNREG, &unreg) == -1)
if (errno != ENOENT)
- return -1;
+ goto fail;
+
+ if (ioctl(fd, DIAG_IOCSDEL, "__test_event") == -1) {
+ if (errno == EBUSY) {
+ if (!wait_for_delete())
+ goto fail;
+ } else if (errno != ENOENT)
+ goto fail;
+ }
close(fd);
return 0;
+fail:
+ close(fd);
+
+ return -1;
}
-static int check_print_fmt(const char *event, const char *expected)
+static int check_print_fmt(const char *event, const char *expected, int *check)
{
struct user_reg reg = {0};
char print_fmt[256];
@@ -130,7 +162,7 @@ static int check_print_fmt(const char *event, const char *expected)
int fd;
/* Ensure cleared */
- ret = clear();
+ ret = clear(check);
if (ret != 0)
return ret;
@@ -142,18 +174,24 @@ static int check_print_fmt(const char *event, const char *expected)
reg.size = sizeof(reg);
reg.name_args = (__u64)event;
+ reg.enable_bit = 31;
+ reg.enable_addr = (__u64)check;
+ reg.enable_size = sizeof(*check);
/* Register should work */
ret = ioctl(fd, DIAG_IOCSREG, &reg);
- close(fd);
-
- if (ret != 0)
+ if (ret != 0) {
+ close(fd);
+ printf("Reg failed in fmt\n");
return ret;
+ }
/* Ensure correct print_fmt */
ret = get_print_fmt(print_fmt, sizeof(print_fmt));
+ close(fd);
+
if (ret != 0)
return ret;
@@ -164,6 +202,7 @@ FIXTURE(user) {
int status_fd;
int data_fd;
int enable_fd;
+ int check;
};
FIXTURE_SETUP(user) {
@@ -185,59 +224,69 @@ FIXTURE_TEARDOWN(user) {
close(self->enable_fd);
}
- ASSERT_EQ(0, clear());
+ if (clear(&self->check) != 0)
+ printf("WARNING: Clear didn't work!\n");
}
TEST_F(user, register_events) {
struct user_reg reg = {0};
- int page_size = sysconf(_SC_PAGESIZE);
- char *status_page;
+ struct user_unreg unreg = {0};
reg.size = sizeof(reg);
reg.name_args = (__u64)"__test_event u32 field1; u32 field2";
+ reg.enable_bit = 31;
+ reg.enable_addr = (__u64)&self->check;
+ reg.enable_size = sizeof(self->check);
- status_page = mmap(NULL, page_size, PROT_READ, MAP_SHARED,
- self->status_fd, 0);
+ unreg.size = sizeof(unreg);
+ unreg.disable_bit = 31;
+ unreg.disable_addr = (__u64)&self->check;
/* Register should work */
ASSERT_EQ(0, ioctl(self->data_fd, DIAG_IOCSREG, &reg));
ASSERT_EQ(0, reg.write_index);
- ASSERT_NE(0, reg.status_bit);
- /* Multiple registers should result in same index */
+ /* Multiple registers to the same addr + bit should fail */
+ ASSERT_EQ(-1, ioctl(self->data_fd, DIAG_IOCSREG, &reg));
+ ASSERT_EQ(EADDRINUSE, errno);
+
+ /* Multiple registers to same name should result in same index */
+ reg.enable_bit = 30;
ASSERT_EQ(0, ioctl(self->data_fd, DIAG_IOCSREG, &reg));
ASSERT_EQ(0, reg.write_index);
- ASSERT_NE(0, reg.status_bit);
+
+ /* Multiple registers to same name but different args should fail */
+ reg.enable_bit = 29;
+ reg.name_args = (__u64)"__test_event u32 field1;";
+ ASSERT_EQ(-1, ioctl(self->data_fd, DIAG_IOCSREG, &reg));
+ ASSERT_EQ(EADDRINUSE, errno);
/* Ensure disabled */
self->enable_fd = open(enable_file, O_RDWR);
ASSERT_NE(-1, self->enable_fd);
ASSERT_NE(-1, write(self->enable_fd, "0", sizeof("0")))
- /* MMAP should work and be zero'd */
- ASSERT_NE(MAP_FAILED, status_page);
- ASSERT_NE(NULL, status_page);
- ASSERT_EQ(0, status_check(status_page, reg.status_bit));
-
/* Enable event and ensure bits updated in status */
ASSERT_NE(-1, write(self->enable_fd, "1", sizeof("1")))
- ASSERT_NE(0, status_check(status_page, reg.status_bit));
+ ASSERT_EQ(1 << reg.enable_bit, self->check);
/* Disable event and ensure bits updated in status */
ASSERT_NE(-1, write(self->enable_fd, "0", sizeof("0")))
- ASSERT_EQ(0, status_check(status_page, reg.status_bit));
+ ASSERT_EQ(0, self->check);
/* File still open should return -EBUSY for delete */
ASSERT_EQ(-1, ioctl(self->data_fd, DIAG_IOCSDEL, "__test_event"));
ASSERT_EQ(EBUSY, errno);
- /* Delete should work only after close */
+ /* Unregister */
+ ASSERT_EQ(0, ioctl(self->data_fd, DIAG_IOCSUNREG, &unreg));
+ unreg.disable_bit = 30;
+ ASSERT_EQ(0, ioctl(self->data_fd, DIAG_IOCSUNREG, &unreg));
+
+ /* Delete should have been auto-done after close and unregister */
close(self->data_fd);
- self->data_fd = open(data_file, O_RDWR);
- ASSERT_EQ(0, ioctl(self->data_fd, DIAG_IOCSDEL, "__test_event"));
- /* Unmap should work */
- ASSERT_EQ(0, munmap(status_page, page_size));
+ ASSERT_EQ(true, wait_for_delete());
}
TEST_F(user, write_events) {
@@ -245,11 +294,12 @@ TEST_F(user, write_events) {
struct iovec io[3];
__u32 field1, field2;
int before = 0, after = 0;
- int page_size = sysconf(_SC_PAGESIZE);
- char *status_page;
reg.size = sizeof(reg);
reg.name_args = (__u64)"__test_event u32 field1; u32 field2";
+ reg.enable_bit = 31;
+ reg.enable_addr = (__u64)&self->check;
+ reg.enable_size = sizeof(self->check);
field1 = 1;
field2 = 2;
@@ -261,18 +311,10 @@ TEST_F(user, write_events) {
io[2].iov_base = &field2;
io[2].iov_len = sizeof(field2);
- status_page = mmap(NULL, page_size, PROT_READ, MAP_SHARED,
- self->status_fd, 0);
-
/* Register should work */
ASSERT_EQ(0, ioctl(self->data_fd, DIAG_IOCSREG, &reg));
ASSERT_EQ(0, reg.write_index);
- ASSERT_NE(0, reg.status_bit);
-
- /* MMAP should work and be zero'd */
- ASSERT_NE(MAP_FAILED, status_page);
- ASSERT_NE(NULL, status_page);
- ASSERT_EQ(0, status_check(status_page, reg.status_bit));
+ ASSERT_EQ(0, self->check);
/* Write should fail on invalid slot with ENOENT */
io[0].iov_base = &field2;
@@ -287,13 +329,51 @@ TEST_F(user, write_events) {
ASSERT_NE(-1, write(self->enable_fd, "1", sizeof("1")))
/* Event should now be enabled */
- ASSERT_NE(0, status_check(status_page, reg.status_bit));
+ ASSERT_NE(1 << reg.enable_bit, self->check);
/* Write should make it out to ftrace buffers */
before = trace_bytes();
ASSERT_NE(-1, writev(self->data_fd, (const struct iovec *)io, 3));
after = trace_bytes();
ASSERT_GT(after, before);
+
+ /* Negative index should fail with EINVAL */
+ reg.write_index = -1;
+ ASSERT_EQ(-1, writev(self->data_fd, (const struct iovec *)io, 3));
+ ASSERT_EQ(EINVAL, errno);
+}
+
+TEST_F(user, write_empty_events) {
+ struct user_reg reg = {0};
+ struct iovec io[1];
+ int before = 0, after = 0;
+
+ reg.size = sizeof(reg);
+ reg.name_args = (__u64)"__test_event";
+ reg.enable_bit = 31;
+ reg.enable_addr = (__u64)&self->check;
+ reg.enable_size = sizeof(self->check);
+
+ io[0].iov_base = &reg.write_index;
+ io[0].iov_len = sizeof(reg.write_index);
+
+ /* Register should work */
+ ASSERT_EQ(0, ioctl(self->data_fd, DIAG_IOCSREG, &reg));
+ ASSERT_EQ(0, reg.write_index);
+ ASSERT_EQ(0, self->check);
+
+ /* Enable event */
+ self->enable_fd = open(enable_file, O_RDWR);
+ ASSERT_NE(-1, write(self->enable_fd, "1", sizeof("1")))
+
+ /* Event should now be enabled */
+ ASSERT_EQ(1 << reg.enable_bit, self->check);
+
+ /* Write should make it out to ftrace buffers */
+ before = trace_bytes();
+ ASSERT_NE(-1, writev(self->data_fd, (const struct iovec *)io, 1));
+ after = trace_bytes();
+ ASSERT_GT(after, before);
}
TEST_F(user, write_fault) {
@@ -304,6 +384,9 @@ TEST_F(user, write_fault) {
reg.size = sizeof(reg);
reg.name_args = (__u64)"__test_event u64 anon";
+ reg.enable_bit = 31;
+ reg.enable_addr = (__u64)&self->check;
+ reg.enable_size = sizeof(self->check);
anon = mmap(NULL, l, PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
ASSERT_NE(MAP_FAILED, anon);
@@ -316,7 +399,6 @@ TEST_F(user, write_fault) {
/* Register should work */
ASSERT_EQ(0, ioctl(self->data_fd, DIAG_IOCSREG, &reg));
ASSERT_EQ(0, reg.write_index);
- ASSERT_NE(0, reg.status_bit);
/* Write should work normally */
ASSERT_NE(-1, writev(self->data_fd, (const struct iovec *)io, 2));
@@ -333,24 +415,17 @@ TEST_F(user, write_validator) {
int loc, bytes;
char data[8];
int before = 0, after = 0;
- int page_size = sysconf(_SC_PAGESIZE);
- char *status_page;
-
- status_page = mmap(NULL, page_size, PROT_READ, MAP_SHARED,
- self->status_fd, 0);
reg.size = sizeof(reg);
reg.name_args = (__u64)"__test_event __rel_loc char[] data";
+ reg.enable_bit = 31;
+ reg.enable_addr = (__u64)&self->check;
+ reg.enable_size = sizeof(self->check);
/* Register should work */
ASSERT_EQ(0, ioctl(self->data_fd, DIAG_IOCSREG, &reg));
ASSERT_EQ(0, reg.write_index);
- ASSERT_NE(0, reg.status_bit);
-
- /* MMAP should work and be zero'd */
- ASSERT_NE(MAP_FAILED, status_page);
- ASSERT_NE(NULL, status_page);
- ASSERT_EQ(0, status_check(status_page, reg.status_bit));
+ ASSERT_EQ(0, self->check);
io[0].iov_base = &reg.write_index;
io[0].iov_len = sizeof(reg.write_index);
@@ -369,7 +444,7 @@ TEST_F(user, write_validator) {
ASSERT_NE(-1, write(self->enable_fd, "1", sizeof("1")))
/* Event should now be enabled */
- ASSERT_NE(0, status_check(status_page, reg.status_bit));
+ ASSERT_EQ(1 << reg.enable_bit, self->check);
/* Full in-bounds write should work */
before = trace_bytes();
@@ -409,71 +484,88 @@ TEST_F(user, print_fmt) {
int ret;
ret = check_print_fmt("__test_event __rel_loc char[] data",
- "print fmt: \"data=%s\", __get_rel_str(data)");
+ "print fmt: \"data=%s\", __get_rel_str(data)",
+ &self->check);
ASSERT_EQ(0, ret);
ret = check_print_fmt("__test_event __data_loc char[] data",
- "print fmt: \"data=%s\", __get_str(data)");
+ "print fmt: \"data=%s\", __get_str(data)",
+ &self->check);
ASSERT_EQ(0, ret);
ret = check_print_fmt("__test_event s64 data",
- "print fmt: \"data=%lld\", REC->data");
+ "print fmt: \"data=%lld\", REC->data",
+ &self->check);
ASSERT_EQ(0, ret);
ret = check_print_fmt("__test_event u64 data",
- "print fmt: \"data=%llu\", REC->data");
+ "print fmt: \"data=%llu\", REC->data",
+ &self->check);
ASSERT_EQ(0, ret);
ret = check_print_fmt("__test_event s32 data",
- "print fmt: \"data=%d\", REC->data");
+ "print fmt: \"data=%d\", REC->data",
+ &self->check);
ASSERT_EQ(0, ret);
ret = check_print_fmt("__test_event u32 data",
- "print fmt: \"data=%u\", REC->data");
+ "print fmt: \"data=%u\", REC->data",
+ &self->check);
ASSERT_EQ(0, ret);
ret = check_print_fmt("__test_event int data",
- "print fmt: \"data=%d\", REC->data");
+ "print fmt: \"data=%d\", REC->data",
+ &self->check);
ASSERT_EQ(0, ret);
ret = check_print_fmt("__test_event unsigned int data",
- "print fmt: \"data=%u\", REC->data");
+ "print fmt: \"data=%u\", REC->data",
+ &self->check);
ASSERT_EQ(0, ret);
ret = check_print_fmt("__test_event s16 data",
- "print fmt: \"data=%d\", REC->data");
+ "print fmt: \"data=%d\", REC->data",
+ &self->check);
ASSERT_EQ(0, ret);
ret = check_print_fmt("__test_event u16 data",
- "print fmt: \"data=%u\", REC->data");
+ "print fmt: \"data=%u\", REC->data",
+ &self->check);
ASSERT_EQ(0, ret);
ret = check_print_fmt("__test_event short data",
- "print fmt: \"data=%d\", REC->data");
+ "print fmt: \"data=%d\", REC->data",
+ &self->check);
ASSERT_EQ(0, ret);
ret = check_print_fmt("__test_event unsigned short data",
- "print fmt: \"data=%u\", REC->data");
+ "print fmt: \"data=%u\", REC->data",
+ &self->check);
ASSERT_EQ(0, ret);
ret = check_print_fmt("__test_event s8 data",
- "print fmt: \"data=%d\", REC->data");
+ "print fmt: \"data=%d\", REC->data",
+ &self->check);
ASSERT_EQ(0, ret);
ret = check_print_fmt("__test_event u8 data",
- "print fmt: \"data=%u\", REC->data");
+ "print fmt: \"data=%u\", REC->data",
+ &self->check);
ASSERT_EQ(0, ret);
ret = check_print_fmt("__test_event char data",
- "print fmt: \"data=%d\", REC->data");
+ "print fmt: \"data=%d\", REC->data",
+ &self->check);
ASSERT_EQ(0, ret);
ret = check_print_fmt("__test_event unsigned char data",
- "print fmt: \"data=%u\", REC->data");
+ "print fmt: \"data=%u\", REC->data",
+ &self->check);
ASSERT_EQ(0, ret);
ret = check_print_fmt("__test_event char[4] data",
- "print fmt: \"data=%s\", REC->data");
+ "print fmt: \"data=%s\", REC->data",
+ &self->check);
ASSERT_EQ(0, ret);
}
generated by cgit v1.2.3 (git 2.39.1) at 2025-08-14 17:07:23 +0000