Revert "[lit] Support more ulimit options"

This reverts commit 8f1c72d.

This is causing builtbot failures.

https://lab.llvm.org/buildbot/#/builders/23/builds/15030
https://lab.llvm.org/buildbot/#/builders/190/builds/29834

Author: boomanaiden154

llvm/utils/lit/lit/TestRunner.py

@@ -612,10 +612,6 @@ 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]

llvm/utils/lit/lit/builtin_commands/_launch_with_limit.py

@@ -17,10 +17,6 @@ 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)
 

llvm/utils/lit/tests/Inputs/shtest-ulimit/print_limits.py

@@ -2,5 +2,3 @@
 
 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]))

llvm/utils/lit/tests/Inputs/shtest-ulimit/ulimit_okay.txt

@@ -1,6 +1,4 @@
 # 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

llvm/utils/lit/tests/shtest-ulimit.py

@@ -19,11 +19,7 @@
 
 # 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]]