[PATCH v8 3/5] selftests/sgx: Dump enclave memory map

Jarkko Sakkinen
2021-06-10T08:30:37Z

Often, it's useful to check whether /proc/self/maps looks sane when
dealing with memory mapped objects, especially when they are JIT'ish
dynamically constructed objects. Therefore, dump "/dev/sgx_enclave"
matching lines from the memory map in FIXTURE_SETUP().

Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
---
tools/testing/selftests/sgx/main.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)

diff --git a/tools/testing/selftests/sgx/main.c b/tools/testing/selftests/sgx/main.c
index 6da19b6bf287..14030f8b85ff 100644
--- a/tools/testing/selftests/sgx/main.c
+++ b/tools/testing/selftests/sgx/main.c
@@ -117,6 +117,8 @@ FIXTURE_SETUP(enclave)
Elf64_Sym *sgx_enter_enclave_sym = NULL;
struct vdso_symtab symtab;
struct encl_segment *seg;
+ char maps_line[256];
+ FILE *maps_file;
unsigned int i;
void *addr;

@@ -167,6 +169,18 @@ FIXTURE_SETUP(enclave)
memset(&self->run, 0, sizeof(self->run));
self->run.tcs = self->encl.encl_base;

+ maps_file = fopen("/proc/self/maps", "r");
+ if (maps_file != NULL) {
+ while (fgets(maps_line, sizeof(maps_line), maps_file) != NULL) {
+ maps_line[strlen(maps_line) - 1] = '\0';
+
+ if (strstr(maps_line, "/dev/sgx_enclave"))
+ TH_LOG("%s", maps_line);
+ }
+
+ fclose(maps_file);
+ }
+
err:
if (!sgx_enter_enclave_sym)
encl_delete(&self->encl);
--
2.31.1