From a64604470591a54239a20c8e1ac19663bce2de49 Mon Sep 17 00:00:00 2001
From: Sagar Karandikar <sagark@eecs.berkeley.edu>
Date: Sun, 16 Oct 2022 17:19:12 -0700
Subject: [PATCH] fix open files issue and bump firesim with various fixes

---
 build-setup.sh            |  1 +
 scripts/fix-open-files.sh | 12 ++++++++++++
 sims/firesim              |  2 +-
 3 files changed, 14 insertions(+), 1 deletion(-)
 create mode 100644 scripts/fix-open-files.sh

diff --git a/build-setup.sh b/build-setup.sh
index 2435705b..8d5d25a5 100755
--- a/build-setup.sh
+++ b/build-setup.sh
@@ -96,4 +96,5 @@ $RDIR/scripts/gen-tags.sh
 cat << EOT >> env.sh
 # line auto-generated by $0
 conda activate $RDIR/.conda-env
+source $RDIR/scripts/fix-open-files.sh
 EOT
diff --git a/scripts/fix-open-files.sh b/scripts/fix-open-files.sh
new file mode 100644
index 00000000..79e12e7a
--- /dev/null
+++ b/scripts/fix-open-files.sh
@@ -0,0 +1,12 @@
+
+# first, check if the system allows sufficient limits (the hard limit)
+HARD_LIMIT=$(ulimit -Hn)
+REQUIRED_LIMIT=16384
+
+if [ "$HARD_LIMIT" -lt "$REQUIRED_LIMIT" ]; then
+    echo "WARNING: Your system does not support an open files limit (the output of 'ulimit -Sn' and 'ulimit -Hn') of at least $REQUIRED_LIMIT, which is required to workaround a bug in buildroot. You will not be able to build a Linux distro with FireMarshal until this is addressed."
+fi
+
+# in any case, set the soft limit to the same value as the hard limit
+ulimit -Sn $(ulimit -Hn)
+
diff --git a/sims/firesim b/sims/firesim
index 37d4fd03..b1abd4b2 160000
--- a/sims/firesim
+++ b/sims/firesim
@@ -1 +1 @@
-Subproject commit 37d4fd03d68af44bfe22712c102ec0c2b361c9f7
+Subproject commit b1abd4b296c84b52eab4270bbe8b7bd835d68cd0