[PATCH 1/2] selftests/powerpc: Abort load_unaligned_zeropad on unhandled SEGV

If the load unaligned zeropad test takes a SEGV which can't be handled,
we increment segv_error, print the offending NIP and then return without
taking any further action. In almost all cases this means we'll just
take the SEGV again, and loop eternally spamming the console.

Instead just abort(), it's a fatal error in the test. The test harness
will notice that the child died and print a nice message for us.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
---
 tools/testing/selftests/powerpc/primitives/load_unaligned_zeropad.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/tools/testing/selftests/powerpc/primitives/load_unaligned_zeropad.c b/tools/testing/selftests/powerpc/primitives/load_unaligned_zeropad.c
index 6cae06117b55..cf7a4a114a90 100644
--- a/tools/testing/selftests/powerpc/primitives/load_unaligned_zeropad.c
+++ b/tools/testing/selftests/powerpc/primitives/load_unaligned_zeropad.c

@@ -73,7 +73,6 @@ extern char __stop___ex_table[];
 #error implement UCONTEXT_NIA
 #endif
 
-static int segv_error;
 
 static void segv_handler(int signr, siginfo_t *info, void *ptr)
 {

@@ -95,7 +94,7 @@ static void segv_handler(int signr, siginfo_t *info, void *ptr)
 	}
 
 	printf("No exception table match for NIA %lx ADDR %lx\n", *ip, addr);
-	segv_error++;
+	abort();
 }
 
 static void setup_segv_handler(void)

@@ -145,8 +144,6 @@ static int test_body(void)
 	for (i = 0; i < page_size; i++)
 		FAIL_IF(do_one_test(mem_region+i, i));
 
-	FAIL_IF(segv_error);
-
 	return 0;
 }
 

-- 
2.7.4

If the result returned by load_unaligned_zeropad() doesn't match what we
expect we should fail the test!

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
---
 tools/testing/selftests/powerpc/primitives/load_unaligned_zeropad.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/powerpc/primitives/load_unaligned_zeropad.c b/tools/testing/selftests/powerpc/primitives/load_unaligned_zeropad.c
index cf7a4a114a90..cd7af4e1b65a 100644
--- a/tools/testing/selftests/powerpc/primitives/load_unaligned_zeropad.c
+++ b/tools/testing/selftests/powerpc/primitives/load_unaligned_zeropad.c

@@ -118,8 +118,10 @@ static int do_one_test(char *p, int page_offset)
 
 	got = load_unaligned_zeropad(p);
 
-	if (should != got)
+	if (should != got) {
 		printf("offset %u load_unaligned_zeropad returned 0x%lx, should be 0x%lx\n", page_offset, got, should);
+		return 1;
+	}
 
 	return 0;
 }

-- 
2.7.4

On Thu, 2016-03-11 at 04:41:00 UTC, Michael Ellerman wrote:

If the load unaligned zeropad test takes a SEGV which can't be handled,
we increment segv_error, print the offending NIP and then return without
taking any further action. In almost all cases this means we'll just
take the SEGV again, and loop eternally spamming the console.

Instead just abort(), it's a fatal error in the test. The test harness
will notice that the child died and print a nice message for us.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

Applied to powerpc next.

https://git.kernel.org/powerpc/c/06236f4efb926aa433e2cb3e36e846

cheers

On Thu, 2016-03-11 at 04:41:01 UTC, Michael Ellerman wrote:

If the result returned by load_unaligned_zeropad() doesn't match what we
expect we should fail the test!

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

Applied to powerpc next.

https://git.kernel.org/powerpc/c/997e200182347d2cc7e37bc43eaafe

cheers