From 8f1c72dcd3fc4bc871bbcd06bfae76510f3714b0 Mon Sep 17 00:00:00 2001
From: Aiden Grossman <aidengrossman@google.com>
Date: Mon, 27 Oct 2025 10:43:56 -0700
Subject: [PATCH] [lit] Support more ulimit options

These are the other options used in compiler-rt that we also need to
support.

Reviewers: arichardson, petrhosek, ilovepi

Reviewed By: ilovepi, arichardson

Pull Request: https://github.com/llvm/llvm-project/pull/165122
---
 llvm/utils/lit/lit/TestRunner.py                          | 4 ++++
 llvm/utils/lit/lit/builtin_commands/_launch_with_limit.py | 4 ++++
 llvm/utils/lit/tests/Inputs/shtest-ulimit/print_limits.py | 2 ++
 llvm/utils/lit/tests/Inputs/shtest-ulimit/ulimit_okay.txt | 2 ++
 llvm/utils/lit/tests/shtest-ulimit.py                     | 4 ++++
 5 files changed, 16 insertions(+)

diff --git a/llvm/utils/lit/lit/TestRunner.py b/llvm/utils/lit/lit/TestRunner.py
index f88314547bb3..a48df097403c 100644
--- a/llvm/utils/lit/lit/TestRunner.py
+++ b/llvm/utils/lit/lit/TestRunner.py
@@ -612,6 +612,10 @@ def executeBuiltinUlimit(cmd, shenv):
         shenv.ulimit["RLIMIT_AS"] = new_limit * 1024
     elif cmd.args[1] == "-n":
         shenv.ulimit["RLIMIT_NOFILE"] = new_limit
+    elif cmd.args[1] == "-s":
+        shenv.ulimit["RLIMIT_STACK"] = new_limit * 1024
+    elif cmd.args[1] == "-f":
+        shenv.ulimit["RLIMIT_FSIZE"] = new_limit
     else:
         raise InternalShellError(
             cmd, "'ulimit' does not support option: %s" % cmd.args[1]
diff --git a/llvm/utils/lit/lit/builtin_commands/_launch_with_limit.py b/llvm/utils/lit/lit/builtin_commands/_launch_with_limit.py
index 33d2d59ff0db..a9dc2595497e 100644
--- a/llvm/utils/lit/lit/builtin_commands/_launch_with_limit.py
+++ b/llvm/utils/lit/lit/builtin_commands/_launch_with_limit.py
@@ -17,6 +17,10 @@ def main(argv):
                 resource.setrlimit(resource.RLIMIT_AS, limit)
             elif limit_str == "RLIMIT_NOFILE":
                 resource.setrlimit(resource.RLIMIT_NOFILE, limit)
+            elif limit_str == "RLIMIT_STACK":
+                resource.setrlimit(resource.RLIMIT_STACK, limit)
+            elif limit_str == "RLIMIT_FSIZE":
+                resource.setrlimit(resource.RLIMIT_FSIZE, limit)
     process_output = subprocess.run(command_args)
     sys.exit(process_output.returncode)
 
diff --git a/llvm/utils/lit/tests/Inputs/shtest-ulimit/print_limits.py b/llvm/utils/lit/tests/Inputs/shtest-ulimit/print_limits.py
index 632f954fa8fd..c732c0429e66 100644
--- a/llvm/utils/lit/tests/Inputs/shtest-ulimit/print_limits.py
+++ b/llvm/utils/lit/tests/Inputs/shtest-ulimit/print_limits.py
@@ -2,3 +2,5 @@ import resource
 
 print("RLIMIT_AS=" + str(resource.getrlimit(resource.RLIMIT_AS)[0]))
 print("RLIMIT_NOFILE=" + str(resource.getrlimit(resource.RLIMIT_NOFILE)[0]))
+print("RLIMIT_STACK=" + str(resource.getrlimit(resource.RLIMIT_STACK)[0]))
+print("RLIMIT_FSIZE=" + str(resource.getrlimit(resource.RLIMIT_FSIZE)[0]))
diff --git a/llvm/utils/lit/tests/Inputs/shtest-ulimit/ulimit_okay.txt b/llvm/utils/lit/tests/Inputs/shtest-ulimit/ulimit_okay.txt
index 4edf1c303a09..d38dc44fa033 100644
--- a/llvm/utils/lit/tests/Inputs/shtest-ulimit/ulimit_okay.txt
+++ b/llvm/utils/lit/tests/Inputs/shtest-ulimit/ulimit_okay.txt
@@ -1,4 +1,6 @@
 # RUN: ulimit -n 50
+# RUN: ulimit -s 256
+# RUN: ulimit -f 5
 # RUN: %{python} %S/print_limits.py
 # Fail the test so that we can assert on the output.
 # RUN: not echo return
diff --git a/llvm/utils/lit/tests/shtest-ulimit.py b/llvm/utils/lit/tests/shtest-ulimit.py
index 09cd475b737c..ba3de8b1bfce 100644
--- a/llvm/utils/lit/tests/shtest-ulimit.py
+++ b/llvm/utils/lit/tests/shtest-ulimit.py
@@ -19,7 +19,11 @@
 
 # CHECK-LABEL: FAIL: shtest-ulimit :: ulimit_okay.txt ({{[^)]*}})
 # CHECK: ulimit -n 50
+# CHECK: ulimit -s 256
+# CHECK: ulimit -f 5
 # CHECK: RLIMIT_NOFILE=50
+# CHECK: RLIMIT_STACK=262144
+# CHECK: RLIMIT_FSIZE=5
 
 # CHECK-LABEL: FAIL: shtest-ulimit :: ulimit_reset.txt ({{[^)]*}})
 # CHECK: RLIMIT_NOFILE=[[BASE_NOFILE_LIMIT]]