diff options
author | Ravi Bangoria | 2019-10-17 15:02:03 +0530 |
---|---|---|
committer | Michael Ellerman | 2019-11-13 16:58:04 +1100 |
commit | 949758a2f4e606a2575b3cfd0ea22c1d4784c673 (patch) | |
tree | c0c26816717c98ca5870abbabdc5a93521f7c4d9 /tools/testing/selftests/powerpc | |
parent | c2837acfbf390c49056b4b412b65ce39977c15df (diff) |
powerpc/watchpoint: Add DAR outside test in perf-hwbreak.c selftest
So far we used to ignore exception if DAR points outside of user
specified range. But now we are ignoring it only if actual load/store
range does not overlap with user specified range. Include selftests
for the same:
# ./tools/testing/selftests/powerpc/ptrace/perf-hwbreak
...
TESTED: No overlap
TESTED: Partial overlap
TESTED: Partial overlap
TESTED: No overlap
TESTED: Full overlap
success: perf_hwbreak
Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20191017093204.7511-7-ravi.bangoria@linux.ibm.com
Diffstat (limited to 'tools/testing/selftests/powerpc')
-rw-r--r-- | tools/testing/selftests/powerpc/ptrace/perf-hwbreak.c | 119 |
1 files changed, 118 insertions, 1 deletions
diff --git a/tools/testing/selftests/powerpc/ptrace/perf-hwbreak.c b/tools/testing/selftests/powerpc/ptrace/perf-hwbreak.c index 200337daec42..c1f324afdbf3 100644 --- a/tools/testing/selftests/powerpc/ptrace/perf-hwbreak.c +++ b/tools/testing/selftests/powerpc/ptrace/perf-hwbreak.c @@ -148,6 +148,121 @@ static int runtestsingle(int readwriteflag, int exclude_user, int arraytest) return 0; } +static int runtest_dar_outside(void) +{ + void *target; + volatile __u16 temp16; + volatile __u64 temp64; + struct perf_event_attr attr; + int break_fd; + unsigned long long breaks; + int fail = 0; + size_t res; + + target = malloc(8); + if (!target) { + perror("malloc failed"); + exit(EXIT_FAILURE); + } + + /* setup counters */ + memset(&attr, 0, sizeof(attr)); + attr.disabled = 1; + attr.type = PERF_TYPE_BREAKPOINT; + attr.exclude_kernel = 1; + attr.exclude_hv = 1; + attr.exclude_guest = 1; + attr.bp_type = HW_BREAKPOINT_RW; + /* watch middle half of target array */ + attr.bp_addr = (__u64)(target + 2); + attr.bp_len = 4; + break_fd = sys_perf_event_open(&attr, 0, -1, -1, 0); + if (break_fd < 0) { + free(target); + perror("sys_perf_event_open"); + exit(EXIT_FAILURE); + } + + /* Shouldn't hit. */ + ioctl(break_fd, PERF_EVENT_IOC_RESET); + ioctl(break_fd, PERF_EVENT_IOC_ENABLE); + temp16 = *((__u16 *)target); + *((__u16 *)target) = temp16; + ioctl(break_fd, PERF_EVENT_IOC_DISABLE); + res = read(break_fd, &breaks, sizeof(unsigned long long)); + assert(res == sizeof(unsigned long long)); + if (breaks == 0) { + printf("TESTED: No overlap\n"); + } else { + printf("FAILED: No overlap: %lld != 0\n", breaks); + fail = 1; + } + + /* Hit */ + ioctl(break_fd, PERF_EVENT_IOC_RESET); + ioctl(break_fd, PERF_EVENT_IOC_ENABLE); + temp16 = *((__u16 *)(target + 1)); + *((__u16 *)(target + 1)) = temp16; + ioctl(break_fd, PERF_EVENT_IOC_DISABLE); + res = read(break_fd, &breaks, sizeof(unsigned long long)); + assert(res == sizeof(unsigned long long)); + if (breaks == 2) { + printf("TESTED: Partial overlap\n"); + } else { + printf("FAILED: Partial overlap: %lld != 2\n", breaks); + fail = 1; + } + + /* Hit */ + ioctl(break_fd, PERF_EVENT_IOC_RESET); + ioctl(break_fd, PERF_EVENT_IOC_ENABLE); + temp16 = *((__u16 *)(target + 5)); + *((__u16 *)(target + 5)) = temp16; + ioctl(break_fd, PERF_EVENT_IOC_DISABLE); + res = read(break_fd, &breaks, sizeof(unsigned long long)); + assert(res == sizeof(unsigned long long)); + if (breaks == 2) { + printf("TESTED: Partial overlap\n"); + } else { + printf("FAILED: Partial overlap: %lld != 2\n", breaks); + fail = 1; + } + + /* Shouldn't Hit */ + ioctl(break_fd, PERF_EVENT_IOC_RESET); + ioctl(break_fd, PERF_EVENT_IOC_ENABLE); + temp16 = *((__u16 *)(target + 6)); + *((__u16 *)(target + 6)) = temp16; + ioctl(break_fd, PERF_EVENT_IOC_DISABLE); + res = read(break_fd, &breaks, sizeof(unsigned long long)); + assert(res == sizeof(unsigned long long)); + if (breaks == 0) { + printf("TESTED: No overlap\n"); + } else { + printf("FAILED: No overlap: %lld != 0\n", breaks); + fail = 1; + } + + /* Hit */ + ioctl(break_fd, PERF_EVENT_IOC_RESET); + ioctl(break_fd, PERF_EVENT_IOC_ENABLE); + temp64 = *((__u64 *)target); + *((__u64 *)target) = temp64; + ioctl(break_fd, PERF_EVENT_IOC_DISABLE); + res = read(break_fd, &breaks, sizeof(unsigned long long)); + assert(res == sizeof(unsigned long long)); + if (breaks == 2) { + printf("TESTED: Full overlap\n"); + } else { + printf("FAILED: Full overlap: %lld != 2\n", breaks); + fail = 1; + } + + free(target); + close(break_fd); + return fail; +} + static int runtest(void) { int rwflag; @@ -172,7 +287,9 @@ static int runtest(void) return ret; } } - return 0; + + ret = runtest_dar_outside(); + return ret; } |