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selftests: breakpoint_test: use ksft_* var arg msg api

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Use ksft_* var arg msg to include strerror() info. in test output. Change
output from child process to use ksft_print_msg() instead of ksft_exit_*
to avoid double counting tests and ensure parent does the incrementing
test counters. Also includes unused variable cleanup.

Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
This commit is contained in:
Shuah Khan 2017-06-29 15:19:47 -06:00
parent ab52a48445
commit 4ca562878b
1 changed files with 16 additions and 12 deletions
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28
tools/testing/selftests/breakpoints/breakpoint_test.c
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@ -16,6 +16,8 @@
#include <signal.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <errno.h>
#include <string.h>
#include "../kselftest.h"
@ -43,7 +45,8 @@ static void set_breakpoint_addr(void *addr, int n)
ret = ptrace(PTRACE_POKEUSER, child_pid,
offsetof(struct user, u_debugreg[n]), addr);
if (ret)
ksft_exit_fail_msg("Can't set breakpoint addr");
ksft_exit_fail_msg("Can't set breakpoint addr: %s\n",
strerror(errno));
}
static void toggle_breakpoint(int n, int type, int len,
@ -103,8 +106,10 @@ static void toggle_breakpoint(int n, int type, int len,
ret = ptrace(PTRACE_POKEUSER, child_pid,
offsetof(struct user, u_debugreg[7]), dr7);
if (ret)
ksft_exit_fail_msg("Can't set dr7");
if (ret) {
ksft_print_msg("Can't set dr7: %s\n", strerror(errno));
exit(-1);
}
}
/* Dummy variables to test read/write accesses */
@ -202,7 +207,7 @@ static void trigger_tests(void)
ret = ptrace(PTRACE_TRACEME, 0, NULL, 0);
if (ret) {
perror("Can't be traced?\n");
ksft_print_msg("Can't be traced? %s\n", strerror(errno));
return;
}
@ -257,7 +262,6 @@ static void trigger_tests(void)
static void check_success(const char *msg)
{
const char *msg2;
int child_nr_tests;
int status;
int ret;
@ -265,7 +269,6 @@ static void check_success(const char *msg)
/* Wait for the child to SIGTRAP */
wait(&status);
msg2 = "Failed";
ret = 0;
if (WSTOPSIG(status) == SIGTRAP) {
@ -274,7 +277,7 @@ static void check_success(const char *msg)
if (child_nr_tests == nr_tests)
ret = 1;
if (ptrace(PTRACE_POKEDATA, child_pid, &trapped, 1))
ksft_exit_fail_msg("Can't poke");
ksft_exit_fail_msg("Can't poke: %s\n", strerror(errno));
}
nr_tests++;
@ -293,7 +296,7 @@ static void launch_instruction_breakpoints(char *buf, int local, int global)
set_breakpoint_addr(dummy_funcs[i], i);
toggle_breakpoint(i, BP_X, 1, local, global, 1);
ptrace(PTRACE_CONT, child_pid, NULL, 0);
sprintf(buf, "Test breakpoint %d with local: %d global: %d",
sprintf(buf, "Test breakpoint %d with local: %d global: %d\n",
i, local, global);
check_success(buf);
toggle_breakpoint(i, BP_X, 1, local, global, 0);
@ -315,8 +318,9 @@ static void launch_watchpoints(char *buf, int mode, int len,
set_breakpoint_addr(&dummy_var[i], i);
toggle_breakpoint(i, mode, len, local, global, 1);
ptrace(PTRACE_CONT, child_pid, NULL, 0);
sprintf(buf, "Test %s watchpoint %d with len: %d local: "
"%d global: %d", mode_str, i, len, local, global);
sprintf(buf,
"Test %s watchpoint %d with len: %d local: %d global: %d\n",
mode_str, i, len, local, global);
check_success(buf);
toggle_breakpoint(i, mode, len, local, global, 0);
}
@ -382,7 +386,7 @@ int main(int argc, char **argv)
pid = fork();
if (!pid) {
trigger_tests();
return 0;
exit(0);
}
child_pid = pid;
@ -393,5 +397,5 @@ int main(int argc, char **argv)
wait(NULL);
return ksft_exit_pass();
ksft_exit_pass();
}