linux-kernel - [PATCH V2 07/15] selftests/sgx: Dump segments and /proc/self/maps only on failure

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Message-Id: <c8f5ca6be6b040c3924d0d7d79f3eca931671a7f.1635447301.git.reinette.chatre@intel.com>
Date:   Thu, 28 Oct 2021 13:37:32 -0700
From:   Reinette Chatre <reinette.chatre@...el.com>
To:     jarkko@...nel.org, linux-sgx@...r.kernel.org, shuah@...nel.org,
        dave.hansen@...ux.intel.com
Cc:     seanjc@...gle.com, linux-kselftest@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH V2 07/15] selftests/sgx: Dump segments and /proc/self/maps only on failure

From: Jarkko Sakkinen <jarkko@...nel.org>

Logging is always a compromise between clarity and detail. The main use
case for dumping VMA's is when FIXTURE_SETUP() fails, and is less important
for enclaves that do initialize correctly. Therefore, print the segments
and /proc/self/maps only in the error case.

Finally, if a single test ever creates multiple enclaves, the amount of
log lines would become enormous.

Signed-off-by: Jarkko Sakkinen <jarkko@...nel.org>
Acked-by: Dave Hansen <dave.hansen@...ux.intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@...el.com>
---
Changes since V1:
- Add signature from Dave.

 tools/testing/selftests/sgx/main.c | 23 ++++++++++++-----------
 1 file changed, 12 insertions(+), 11 deletions(-)

diff --git a/tools/testing/selftests/sgx/main.c b/tools/testing/selftests/sgx/main.c
index 6858a35fed20..deab02f2f3ce 100644
--- a/tools/testing/selftests/sgx/main.c
+++ b/tools/testing/selftests/sgx/main.c
@@ -127,12 +127,6 @@ FIXTURE_SETUP(enclave)
 		ksft_exit_skip("cannot load enclaves\n");
 	}
 
-	for (i = 0; i < self->encl.nr_segments; i++) {
-		seg = &self->encl.segment_tbl[i];
-
-		TH_LOG("0x%016lx 0x%016lx 0x%02x", seg->offset, seg->size, seg->prot);
-	}
-
 	if (!encl_measure(&self->encl))
 		goto err;
 
@@ -169,6 +163,17 @@ FIXTURE_SETUP(enclave)
 	memset(&self->run, 0, sizeof(self->run));
 	self->run.tcs = self->encl.encl_base;
 
+	return;
+
+err:
+	encl_delete(&self->encl);
+
+	for (i = 0; i < self->encl.nr_segments; i++) {
+		seg = &self->encl.segment_tbl[i];
+
+		TH_LOG("0x%016lx 0x%016lx 0x%02x", seg->offset, seg->size, seg->prot);
+	}
+
 	maps_file = fopen("/proc/self/maps", "r");
 	if (maps_file != NULL)  {
 		while (fgets(maps_line, sizeof(maps_line), maps_file) != NULL) {
@@ -181,11 +186,7 @@ FIXTURE_SETUP(enclave)
 		fclose(maps_file);
 	}
 
-err:
-	if (!sgx_enter_enclave_sym)
-		encl_delete(&self->encl);
-
-	ASSERT_NE(sgx_enter_enclave_sym, NULL);
+	ASSERT_TRUE(false);
 }
 
 FIXTURE_TEARDOWN(enclave)
-- 
2.25.1