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Date: Wed, 28 Jun 2017 01:47:04 +0900
From: Paul Elder <paul.elder@...t.edu>
To: Shuah Khan <shuahkh@....samsung.com>, panand@...hat.com,
will.deacon@....com, labath@...gle.com
Cc: linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] selftests: breakpoints: convert breakpoint_test_arm64
test to TAP13
On 06/28/2017 01:04 AM, Shuah Khan wrote:
> Convert breakpoint_test_arm64 output to TAP13 format.
>
> Signed-off-by: Shuah Khan <shuahkh@....samsung.com>
> ---
> .../selftests/breakpoints/breakpoint_test_arm64.c | 114 ++++++++++++++-------
> 1 file changed, 79 insertions(+), 35 deletions(-)
>
> diff --git a/tools/testing/selftests/breakpoints/breakpoint_test_arm64.c b/tools/testing/selftests/breakpoints/breakpoint_test_arm64.c
> index fa6d57af5217..d13bd0dea13e 100644
> --- a/tools/testing/selftests/breakpoints/breakpoint_test_arm64.c
> +++ b/tools/testing/selftests/breakpoints/breakpoint_test_arm64.c
> @@ -41,20 +41,27 @@ static volatile uint8_t var[96] __attribute__((__aligned__(32)));
> static void child(int size, int wr)
> {
> volatile uint8_t *addr = &var[32 + wr];
> + char msg_buf[512];
>
> if (ptrace(PTRACE_TRACEME, 0, NULL, NULL) != 0) {
> - perror("ptrace(PTRACE_TRACEME) failed");
> - _exit(1);
> + snprintf(msg_buf, sizeof(msg_buf),
> + "ptrace(PTRACE_TRACEME) failed: %s\n",
> + strerror(errno));
> + ksft_exit_fail_msg(msg_buf);
> }
>
> if (raise(SIGSTOP) != 0) {
> - perror("raise(SIGSTOP) failed");
> - _exit(1);
> + snprintf(msg_buf, sizeof(msg_buf),
> + "raise(SIGSTOP) failed: %s\n",
> + strerror(errno));
> + ksft_exit_fail_msg(msg_buf);
> }
>
> if ((uintptr_t) addr % size) {
> - perror("Wrong address write for the given size\n");
> - _exit(1);
> + snprintf(msg_buf, sizeof(msg_buf),
> + "Wrong address write for the given size: %s\n",
> + strerror(errno));
> + ksft_exit_fail_msg(msg_buf);
> }
> switch (size) {
> case 1:
> @@ -90,6 +97,7 @@ static bool set_watchpoint(pid_t pid, int size, int wp)
> const unsigned int control = byte_mask << 5 | type << 3 | enable;
> struct user_hwdebug_state dreg_state;
> struct iovec iov;
> + char msg_buf[512];
>
> memset(&dreg_state, 0, sizeof(dreg_state));
> dreg_state.dbg_regs[0].addr = (uintptr_t)(addr - offset);
> @@ -101,10 +109,15 @@ static bool set_watchpoint(pid_t pid, int size, int wp)
> return true;
>
> if (errno == EIO) {
> - ksft_exit_skip("ptrace(PTRACE_SETREGSET, NT_ARM_HW_WATCH) "
> - "not supported on this hardware\n");
> + snprintf(msg_buf, sizeof(msg_buf),
> + "ptrace(PTRACE_SETREGSET, NT_ARM_HW_WATCH) not supported on this hardware: %s\n",
> + strerror(errno));
> + ksft_exit_skip(msg_buf);
> }
> - perror("ptrace(PTRACE_SETREGSET, NT_ARM_HW_WATCH) failed");
> + snprintf(msg_buf, sizeof(msg_buf),
> + "ptrace(PTRACE_SETREGSET, NT_ARM_HW_WATCH) failed: %s\n",
> + strerror(errno));
> + ksft_test_result_fail(msg_buf);
> return false;
> }
>
> @@ -114,9 +127,14 @@ static bool run_test(int wr_size, int wp_size, int wr, int wp)
> siginfo_t siginfo;
> pid_t pid = fork();
> pid_t wpid;
> + char buf[512];
> + char buf2[512];
>
> if (pid < 0) {
> - perror("fork() failed");
> + snprintf(buf, sizeof(buf),
> + "fork() failed: %s\n",
> + strerror(errno));
> + ksft_test_result_fail(buf);
> return false;
> }
> if (pid == 0)
> @@ -124,15 +142,22 @@ static bool run_test(int wr_size, int wp_size, int wr, int wp)
>
> wpid = waitpid(pid, &status, __WALL);
> if (wpid != pid) {
> - perror("waitpid() failed");
> + snprintf(buf, sizeof(buf),
> + "waitpid() failed: %s\n",
> + strerror(errno));
> + ksft_test_result_fail(buf);
> return false;
> }
> if (!WIFSTOPPED(status)) {
> printf("child did not stop\n");
> + snprintf(buf, sizeof(buf),
> + "child did not stop: %s\n",
> + strerror(errno));
> + ksft_test_result_fail(buf);
> return false;
> }
> if (WSTOPSIG(status) != SIGSTOP) {
> - printf("child did not stop with SIGSTOP\n");
> + ksft_test_result_fail("child did not stop with SIGSTOP\n");
> return false;
> }
>
> @@ -140,42 +165,58 @@ static bool run_test(int wr_size, int wp_size, int wr, int wp)
> return false;
>
> if (ptrace(PTRACE_CONT, pid, NULL, NULL) < 0) {
> - perror("ptrace(PTRACE_SINGLESTEP) failed");
> + snprintf(buf, sizeof(buf),
> + "ptrace(PTRACE_SINGLESTEP) failed: %s\n",
> + strerror(errno));
> + ksft_test_result_fail(buf);
> return false;
> }
>
> alarm(3);
> wpid = waitpid(pid, &status, __WALL);
> if (wpid != pid) {
> - perror("waitpid() failed");
> + snprintf(buf2, sizeof(buf2),
> + "waitpid() failed: %s\n",
> + strerror(errno));
> + ksft_test_result_fail(buf2);
> return false;
> }
> alarm(0);
> if (WIFEXITED(status)) {
> - printf("child did not single-step\t");
> + ksft_test_result_fail("child did not single-step\t");
> return false;
> }
> if (!WIFSTOPPED(status)) {
> - printf("child did not stop\n");
> + ksft_test_result_fail("child did not stop\n");
> return false;
> }
> if (WSTOPSIG(status) != SIGTRAP) {
> - printf("child did not stop with SIGTRAP\n");
> + ksft_test_result_fail("child did not stop with SIGTRAP\n");
> return false;
> }
> if (ptrace(PTRACE_GETSIGINFO, pid, NULL, &siginfo) != 0) {
> perror("ptrace(PTRACE_GETSIGINFO)");
> + snprintf(buf2, sizeof(buf2),
> + "ptrace(PTRACE_GETSIGINFO): %s\n",
> + strerror(errno));
> + ksft_test_result_fail(buf2);
> return false;
> }
> if (siginfo.si_code != TRAP_HWBKPT) {
> - printf("Unexpected si_code %d\n", siginfo.si_code);
> + snprintf(buf2, sizeof(buf2),
> + "Unexpected si_code %d\n",
> + siginfo.si_code);
> + ksft_test_result_fail(buf2);
> return false;
> }
>
> kill(pid, SIGKILL);
> wpid = waitpid(pid, &status, 0);
> if (wpid != pid) {
> - perror("waitpid() failed");
> + snprintf(buf2, sizeof(buf2),
> + "waitpid() failed: %s\n",
> + strerror(errno));
> + ksft_test_result_fail(buf2);
> return false;
> }
> return true;
> @@ -192,6 +233,9 @@ int main(int argc, char **argv)
> struct sigaction act;
> int wr, wp, size;
> bool result;
> + char msg_buf[512];
> +
> + ksft_print_header();
>
> act.sa_handler = sigalrm;
> sigemptyset(&act.sa_mask);
> @@ -200,14 +244,15 @@ int main(int argc, char **argv)
> for (size = 1; size <= 32; size = size*2) {
> for (wr = 0; wr <= 32; wr = wr + size) {
> for (wp = wr - size; wp <= wr + size; wp = wp + size) {
> - printf("Test size = %d write offset = %d watchpoint offset = %d\t", size, wr, wp);
> + snprintf(msg_buf, sizeof(msg_buf),
> + "Test size = %d write offset = %d watchpoint offset = %d\t",
> + size, wr, wp);
> result = run_test(size, MIN(size, 8), wr, wp);
> - if ((result && wr == wp) || (!result && wr != wp)) {
> - printf("[OK]\n");
> - ksft_inc_pass_cnt();
> - } else {
> - printf("[FAILED]\n");
> - ksft_inc_fail_cnt();
> + if ((result && wr == wp) ||
> + (!result && wr != wp))
> + ksft_test_result_pass(msg_buf);
> + else {
> + ksft_test_result_fail(msg_buf);
> succeeded = false;
> }
> }
> @@ -215,19 +260,18 @@ int main(int argc, char **argv)
> }
>
> for (size = 1; size <= 32; size = size*2) {
> - printf("Test size = %d write offset = %d watchpoint offset = -8\t", size, -size);
> -
> - if (run_test(size, 8, -size, -8)) {
> - printf("[OK]\n");
> - ksft_inc_pass_cnt();
> - } else {
> - printf("[FAILED]\n");
> - ksft_inc_fail_cnt();
> + snprintf(msg_buf, sizeof(msg_buf),
> + "Test size = %d write offset = %d watchpoint offset = -8\t",
> + size, -size);
> +
> + if (run_test(size, 8, -size, -8))
> + ksft_test_result_pass(msg_buf);
> + else {
> + ksft_test_result_fail(msg_buf);
> succeeded = false;
> }
> }
>
> - ksft_print_cnts();
> if (succeeded)
> ksft_exit_pass();
> else
>
I would like to remind you that all ksft_* output functions append a newline character already,
so no need to add them.
Otherwise I think this patch is good.
Thank you,
Paul
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