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Merged
boomanaiden154 merged 7 commits into from
Oct 30, 2025
Merged

[lit] Add support for setting limits to unlimited #165123

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59560a5
[𝘀𝗽𝗿] initial version
boomanaiden154 Oct 25, 2025
6687582
[𝘀𝗽𝗿] changes to main this commit is based on
boomanaiden154 Oct 25, 2025
d34141d
fix
boomanaiden154 Oct 26, 2025
e314eaa
[𝘀𝗽𝗿] changes introduced through rebase
boomanaiden154 Oct 27, 2025
cd1e869
rebase
boomanaiden154 Oct 27, 2025
cc7503a
[𝘀𝗽𝗿] changes introduced through rebase
d0k Oct 30, 2025
4c3f0cf
feedback
boomanaiden154 Oct 30, 2025
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19 changes: 15 additions & 4 deletions llvm/utils/lit/lit/TestRunner.py
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Original file line number Diff line number Diff line change
Expand Up @@ -600,20 +600,31 @@ def executeBuiltinUmask(cmd, shenv):

def executeBuiltinUlimit(cmd, shenv):
"""executeBuiltinUlimit - Change the current limits."""
if os.name != "posix":
try:
# Try importing the resource module (available on POSIX systems) and
# emit an error where it does not exist (e.g., Windows).
import resource
except ImportError:
raise InternalShellError(cmd, "'ulimit' not supported on this system")
if len(cmd.args) != 3:
raise InternalShellError(cmd, "'ulimit' requires two arguments")
try:
new_limit = int(cmd.args[2])
if cmd.args[2] == "unlimited":
new_limit = resource.RLIM_INFINITY
else:
new_limit = int(cmd.args[2])
except ValueError as err:
raise InternalShellError(cmd, "Error: 'ulimit': %s" % str(err))
if cmd.args[1] == "-v":
shenv.ulimit["RLIMIT_AS"] = new_limit * 1024
if new_limit != resource.RLIM_INFINITY:
new_limit = new_limit * 1024
shenv.ulimit["RLIMIT_AS"] = new_limit
elif cmd.args[1] == "-n":
shenv.ulimit["RLIMIT_NOFILE"] = new_limit
elif cmd.args[1] == "-s":
shenv.ulimit["RLIMIT_STACK"] = new_limit * 1024
if new_limit != resource.RLIM_INFINITY:
new_limit = new_limit * 1024
shenv.ulimit["RLIMIT_STACK"] = new_limit
elif cmd.args[1] == "-f":
shenv.ulimit["RLIMIT_FSIZE"] = new_limit
else:
Expand Down
6 changes: 6 additions & 0 deletions llvm/utils/lit/tests/Inputs/shtest-ulimit/ulimit_unlimited.txt
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@@ -0,0 +1,6 @@
# RUN: ulimit -f 5
# RUN: %{python} %S/print_limits.py
# RUN: ulimit -f unlimited
# RUN: %{python} %S/print_limits.py
# Fail the test so that we can assert on the output.
# RUN: not echo return
8 changes: 7 additions & 1 deletion llvm/utils/lit/tests/shtest-ulimit.py
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Expand Up @@ -11,7 +11,7 @@
# RUN: not %{lit} -a -v %{inputs}/shtest-ulimit --order=lexical \
# RUN: | FileCheck -DBASE_NOFILE_LIMIT=%{readfile:%t.nofile_limit} %s

# CHECK: -- Testing: 3 tests{{.*}}
# CHECK: -- Testing: 4 tests{{.*}}

# CHECK-LABEL: FAIL: shtest-ulimit :: ulimit-bad-arg.txt ({{[^)]*}})
# CHECK: ulimit -n
Expand All @@ -25,3 +25,9 @@

# CHECK-LABEL: FAIL: shtest-ulimit :: ulimit_reset.txt ({{[^)]*}})
# CHECK: RLIMIT_NOFILE=[[BASE_NOFILE_LIMIT]]

# CHECK-LABEL: FAIL: shtest-ulimit :: ulimit_unlimited.txt ({{[^)]*}})
# CHECK: ulimit -f 5
# CHECK: RLIMIT_FSIZE=5
# CHECK: ulimit -f unlimited
# CHECK: RLIMIT_FSIZE=-1
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