From 4f96790cf3ef13bb4e7d070e8c0de09f268ca32e Mon Sep 17 00:00:00 2001
From: "Hui, Chunyang" <sanqian.hcy@antfin.com>
Date: Thu, 16 Jul 2020 09:27:28 +0000
Subject: [PATCH] Fallback to old way for exit process in simulation mode

---
 src/pal/src/pal_api.c     | 11 ++++++++++-
 src/pal/src/pal_enclave.c |  6 ++++++
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/src/pal/src/pal_api.c b/src/pal/src/pal_api.c
index 3863c87b..faf992ad 100644
--- a/src/pal/src/pal_api.c
+++ b/src/pal/src/pal_api.c
@@ -29,10 +29,12 @@ int occlum_pal_init(const struct occlum_pal_attr *attr) {
         errno = EEXIST;
         return -1;
     }
-
+// FIXME
+#ifndef SGX_MODE_SIM
     if (pal_register_sig_handlers() < 0) {
         return -1;
     }
+#endif
 
     if (pal_init_enclave(attr->instance_dir) < 0) {
         return -1;
@@ -53,10 +55,13 @@ int occlum_pal_init(const struct occlum_pal_attr *attr) {
         goto on_destroy_enclave;
     }
 
+// FIXME
+#ifndef SGX_MODE_SIM
     if (pal_interrupt_thread_start() < 0) {
         PAL_ERROR("Failed to start the interrupt thread: %s", errno2str(errno));
         goto on_destroy_enclave;
     }
+#endif
 
     return 0;
 on_destroy_enclave:
@@ -168,10 +173,14 @@ int occlum_pal_destroy(void) {
 
     int ret = 0;
 
+// FIXME
+#ifndef SGX_MODE_SIM
     if (pal_interrupt_thread_stop() < 0) {
         ret = -1;
         PAL_WARN("Cannot stop the interrupt thread: %s", errno2str(errno));
     }
+#endif
+
     if (pal_destroy_enclave() < 0) {
         ret = -1;
         PAL_WARN("Cannot destroy the enclave");
diff --git a/src/pal/src/pal_enclave.c b/src/pal/src/pal_enclave.c
index b117c1a0..e8246937 100644
--- a/src/pal/src/pal_enclave.c
+++ b/src/pal/src/pal_enclave.c
@@ -130,8 +130,14 @@ int pal_init_enclave(const char *instance_dir) {
 }
 
 int pal_destroy_enclave(void) {
+// FIXME: Due to lack of support for enclave interrupt in simulation mode, some programs
+// come across the problem that it can't exit when running in simulation mode. We have to
+// fallback to the old way to exit brutely in simulation mode.
+#ifndef SGX_MODE_SIM
     sgx_destroy_enclave(global_eid);
     global_eid = SGX_INVALID_ENCLAVE_ID;
+#endif
+
     return 0;
 }